My Depression Essay Example for Free

My Depression EssayGrowing up in a minuscular town wasnt always easy for me. I felt that I was constantly hiding and denying the person that I was and the life that I lived. I was forced to be someone that I really wasnt due to the fact that I had a family secret that I was withholding in order to protect the well-known, family name, Hutcherson. In highschool, no one but family members and close friends knew that I lived with an intoxicantic father. As a child I was always taught to keep our family life secret and never let people know the struggles that our family faced. People always thought that I had the best of everything because of the material possessions I accumulated from my dad. They assumed that because our family had money, we were problem free and oh, how wrong they were It was until my ripened year at Halls High School that I kept leading people on to believe a lie. I finally got tired of savor as though I was two different people with two different lives.Afte r attending counseling for several months, because of the depression that had taken a tole on me, my psychiatrist helped me to realize that it wasnt my fault that my father has this addiction. I soon figured out that there was no reason to be ashamed or embarrassed for things that I had no control over. If people liked me, they should like me for the real me, not who I had been pretending to be. I learned to deal with my fathers alcohol problem by acknowledging the stages of the grieving process. Dr. price taught me that in order to make peace with the hardships in my life, I had to overcome each of the five processes denial, anger, bargaining, depression, and acceptance.Denial was the first, and belike the hardest stage of the grieving process. It seemed as if denial overwelhmed my entire life, even from childhood. It was hard, at times, to admit that living with an alcoholic parent was a part of my life. I didnt extremity to accept the fact that this was a definite part of who I really was. I was ashamed and humiliated. I remember being embarrassed to tell Dr. Bell the whole truth. I also felt like by doing so, I was dishonoring my family and degrading my father. However, after I came to terms with the truth that I had been denying for so long, I felt like a ton of bricks were lifted from me.The second stage of the grieving process is anger. I can remember being so phrenetic at Dad for putting our family through this. There were times that I hated him and wished that something bad would happen to him, just so I could go screen to the life I was accustomed to living, that of lies. I blamed my mother for staying with him and giving us children no choice as to what we wanted. I envied her just about as much as I envied him. I know now, that even though she wasnt happy, she was doing what she felt she had to do, and that was support him 100%. I no longer look at this situation as something to be angry at. I see my father now, as a sick man and not one that intentionally has this unspeakable addiction to hurt the ones he loves.There were times that I remember bargaining with God, asking him to please take this away. I would pray at iniquity that if he would just heal my father, I would be pull up stakesing to do whatever it took to show appreciation. I would make deals with my father, Dad, if you dont drink for two weeks, I will mow the lawn for free. It was things like this that would sometimes be the only thing that gave me hope. At times, the things that I would say to my father would work, only because of the quilt that he felt, but it wouldnt be long and he would be back in the same boat he had been in for many years drinking, uncontrolably.The forth stage is depression. I stick out to say that this is the hardest thing I have ever faced (and still facing) in my life. Looking back now, I remember the thing that depressed me the some was thinking that things were getting better and then being disappointed again. There were ti mes that Dad would stop drinking, sometimes weeks at a time. Though I always knew in my heart that it wasnt going to last long, I still had hope that that particular time could be different.

Light intensity Essay Example for Free

Light intensity EssayThe set up of the circuit is simple as shown above. The 12-volt lamp is set up in a simple circuit. Then in a SEPARATE circuit, the light dependent resistor is connected to the Multimeter, which shows the resistance readings. If I did connect the LDR in the same circuit, I would almost certainly fry the LDR, and ruin the experiment I want to keep the distance from the lamp to the LDR the same. I score decided after testing the system, to put the LDR directly under the lamp. This makes me get the best readings for the earlier voltages when the bulb is dim.It also helps to kindlecel out any new(prenominal) light, which go forth obviously get in the way to a greater extent, the further the LDR is from the bulb. I get out find out how much this effects the results in the preliminary applicatory. I will needed to keep the bulb at a set height, perhaps 2cm above the LDR. During the preliminary practical, there are many things I elicit do to get the optimu m results. That includes keeping the distance and height the same, but also taking the correct resistance reading. You can set the resistance readings on the Multimeter to different levels of accuracy. If you dont have a large enough setting, the dial will display one.I will then go down one until I get a suitable answer. I may even have to change the accuracy settings during the preliminary practical, if they become too inaccurate. My independent variable is voltage (potential difference of opinion). I will be finding out how the intensity of the light effects resistance of the LDR. I will be going up in gaps of 2 volts, up to 12 or 14 volts, giving me seven readings. I need to make sure I get two, preferably 3 sets of good results, to iron out anomalies, getting a better over totally average. Some small errors could creep in when reading off the Multimeter. The resistance readings will start to fluctuate slightly.I will snap the best reading I can by waiting until the Multimeter stays on one number. The more accurately I set the Multimeter, the harder this is to do. Of course, this is only an initial method. The preliminary practical will give me a good feel of the equipment, and where things could go wrong. I will be able to change things for the final practical. Preliminary Work I will need to undertake a preliminary practical for many reasons. A preliminary is very good for helping me get a feel for the equipment. I will do it to find out how much resistance there is without the lamp being turned on, to see what effect other light has on the LDR.I will also see if this changes when the LDR is out in the open. From this, I can decide where I will put the LDR in the final experiment. To start with, I will have the LDR directly under the lamp, so as lowly light as possible gets to the LDR. A second thing I will probably do, is slowly increasing the voltage until a noticeable difference is shown on the LDR. I will also get a good feeling of what I expect to happen in the actual main practical, and where I will be getting anomalous results. I may also be able to predict trends, and alter my graphs. I will only take readings at a few voltages.I may take readings at 4 volts (the lowest reading), 8 (a middle reading), and 12 (the highest reading. These are all of well-nigh use, as they will give me an estimate of the trends, and by finding the highest and lowest readings, the range. I will also need, in my preliminary practical, to take down the conditions that the practical is taken in. I will need to make the experiment as fair as possible, so I will need to see where all the extra light is coming from, so I can regulate that in my main experiment, and also things like the vertical distance from the LDR to the lamp.

Both sides of the debate Essay Example for Free

Both sides of the debate EssayThe purpose of this essay is to describe the arguments relating to nature nurture, providing tell for both sides of the debate. In addition, an analysis of this evidence will be given and a measured conclusion drawn from the evaluation of such. When try oning to understand the composition and alter factors to the human component partlity, both nature and nurture should be taken into consideration, in order to develop a balanced conclusion.When articulating this debate it is imperative to understand a definition of both nature and nurture. Nature is the term use to describe the genetic or inherent characteristics of a human and nurture is the term used to define the environmental factors, which contribute to the human persona. Both nature and nurture are now commonly enchanted as intrinsic factors, which influence the character of an individual, and so psychologists are interested in the factors which influence behaviour both before and after b irth.However this debate has been one of the most controversial and long-standing issues within psychology. Philosopher bum Locke, writing in the 17th century surmised that all humans are born tabularasa, which is the Latin word, meaning blank slate. Locke suggested that all individuals have the freedom to cook their disposition. This belongs the reader an approximation on the length of this debate. (http//en. wikipedia. org/wiki/Tabula_rasa)In opposition to this claim was Francis Galton, who coined the phrase nature nurture in 1883, who published a paper on Hereditary genius, in which he suggested that typically all scared individuals within society were related and that genius is therefore passed on throughout the generations. Galton even went on to argue that individuals with lower levels of intelligence should be prevented from reproducing children. Extremists such as Adolf Hitler later adopted this view during World War two, which subsequently caused the holocaust. (Hayes, 1998, knave 31)The quest to distinguish between the biological characteristics of an individual and the effects of environmental stimulus has aroused the interests of many intellects for the past 300 years. Human traits are difficult to categorise as either due entirely to nature or entirely to nurture, and as such this has created crossover theorists such as Jean Piaget in the 1950s to extend credence to both nature and nurture contributing to the human persona. Piaget suggested that individuals develop in pre-determined stages, however this requires interaction with the environment.(Gross, 2005, page 582) Traditionally, the nature nurture debate did attempt to categorise these human traits and as such, this separated psychologists into two distinct groups empiricists and nativists. Empiricists are those psychologists who believe that the development of an individuals persona derives from predominantly environmental stimulus, such as development and experience. Psychologists suc h as J. B Watson in 1913 extended credence to tabularasa. Watson believed that newborns have no innate content and therefore experience will dictate the persona of any individual.In contrast to this view, nativists such as Gesell in 1943 believed that an individuals persona is determined largely by genetic influences, which have little to do with remote factors. As Gesell advised mothers, regarding a childs personality, to give up the notion that you can either produce (except through inheritance) or that you can basically change it. (Hayes, 1998, page 2) Genetic transmission is the term used to describe the process in which humans acquire biological characteristics from their parents.Cells within the body contain a pump called DNA which is arranged into long strands. These strands are referred to as Chromosomes, which are broken down into smaller units of DNA, known as genes. Humans are composed of 23 pairs of Chromosomes, half of which are passed from the biological mother and h alf from the biological father. As such an individuals genetic make-up is determined from the moment of conception. What is difficult to ascertain is how lots these hereditary genes determine the human persona.The 23rd pair of chromosomes determines the biological sex into which the cells will form two X chromosomes produce a female and an X and Y produces a male. (Hayes, 1998, page 3-4) The biological sex of an individual is commonly considered to determine the gender of an individual. Gender can be defined as the theatrical role allocated to males and females at birth, according to their biological sex. However, there has been debate over gender and whether male and female genders have been created through the socialisation process which occurs from birth in advance.This view became popular in the 1960s, which led to the case study of David Reimer, which supports the nature side of the debate. David Reimer, formally known as Bruce underwent a routine circumcision on the 27th Ap ril 1966, at the age of 8 months. His twin brother was booked in for the same operation however Bruce was the first to undergo this function. The operation was performed by surgeon Jean-Marie Huot, who employ the circumcision with a cautery machine, which was never intended for use on genitals.The results were horrific, and Bruces penis was ruined. Bruces parents consulted Dr John Money a psychologist researching sexual development and gender identity, who advised them that the radical would be sex reassignment, which would involve the removal of Bruces testicles and his gender reassigned as female. Money believed that gender was socially constructed and therefore not biologically predicted. Money therefore advocated that Bruce underwent this procedure to ensure a relatively normal life. At the age of 22 months old, Bruce became known as Brenda.Brenda was given female hormones to induce female characteristics, however, this did not assistant her in feeling like a girl and by the age of 13 had suicidal tendencies. At the age of 15 Brendas parents told her of her gender reassignment and from that point onwards Brenda renamed herself David and resumed her former male gender identity. Davids twin brother Brian was deeply disturbed upon learning of his sister/brothers sex reassignment and later this developed into schizophrenia. (http//en. wikipedia. org/wiki/David_Reimer)

Living Building Challenge BREEAM: Non-Residential Building

Living structure Challenge BREEAM Non-Residential BuildingRethinking the Application of the Living Building Challenge BREEAM for Non-Residential Buildings in the UKBuilding certification and sound judgement has been in spotlight since the rise of the concept of sustainable development, the need to improve expression performance and reduce our consumption. Growing from a sh atomic number 18d ideology of Jason F.Mclennans team, to ready a utopian idea, the Living Building. One that has high potential for miserable racetrack costs, high performance and drug ab drug user comfort, the epitome of the definition of sustainability. The living grammatical tress challenge (LBC) was initially assessed by BNIM against the LEED standard upon its design, to determine its environmental and meet worth in a sustainable matrix. However, in this paper a bewilder case investigation among the LBC rendering 3.0 and BREEAMs code for non-residential buildings 2011, pass on be beneathtaken t o highlight each certifications merits and shortages. Followed by a cross-case analysis of 2 case studies to job on the investigations results.This is in an attempt to highlight which of the assessment methods has more comprehensive and in-depth critical criteria, how its applied by drawing on lessons from the case studies available for hit the books from the public dobriny, with the LBC and BREEAMs online portals.For years, the race to creating sustainable assessment similarlyls has been on-going to payoff a variety of challenges in peoples lives, countries resources and global well worldness (Rees, 1999, Edwards et al., 2013). Problems in a national carapace that include waste tackling, organic and non-organic, vim consumption, water supply some(prenominal) excess and depravity from it, Carbon Dioxide and greenhouse gas emissions, all of which contribute to national contamination statistics, waste and water treatment expenses and energy harvest-homeion (DEFRA, 2012) . T he increase in these costs furthermore continues the cycle to affect the primary user, by raising energy prices for electricity, heating and cooling, county and city taxes and former(a) government or privately housed services (Manne et al., 1991, ASIF et al., 2007).While typical cities contributes to an average of 75% of greenhouse gas emissions according to unite Nations Environmental Programme (UNEP, 2014), commercial structures and transportation story for 16.25% and 25% of the United Kingdoms (UK) energy consumption sectors(Department of animation, 2014, p. 12) . In addition to 38% of the countrys overall energy sinks being accounted towards energy generation, 83% of which is gene treadd through coal power plants, the primary electricity generation method in the UK (Department of Energy, 2014, p. 12), contributing a big(p) emission rate of 0.507 kg CO2/kWh (DEFRA, 2008). Whilst the housing sector remains the dominant sector, but commercial buildings have been on a rise, to accommodate for disaccordent functions, educational, retail, business leaders and learning institutions. (PMRecon, 2013). The social organization sector is in a strong boom (Longworth, Kern and Marshall, 2014), a desire with construction emissions such as material sourcing, material fabrication, and the buildings operation itself.This paper ordain be addressing two case studies from the commercial office buildings sector of the construction industry The Bullitt Center (LBC) and the. Addressing the strategies implemented within each, how each criterion was addressed and the impact on overall performance of the building.In the United Kingdom, the Building Research Establishment (BRE), alongside its assessment shit, the BRE Environmental Assessment Methodology (BREEAM) have explicate a number of schemes to face up different building types, including but non limited to, BREEAM, BREEAM for commercial buildings, and BREEAM for Sustainable Homes (EcoHomes antecedently).The Living b uilding challenge is a squiffy assessment tool created and published by Jason F.Mc Lennan and his associates, a project started from the mid-1990s and first coming to light in August 2006. The Living Building Challenge adopts a restorative personality, one that aims to give back to the environment (Warner, 2015). This paper will onset one of the more rigorous certification tools claimed to be applicable to each building type,). By having a net positive strategy, the building creates an excess of its needs, for storage or if possible to be input into nature as a metaphorical tax for trespassing on it (Monbiot et al., 2007). Theres a range of a 100 or more full living certified buildings around the world, the larger percentage being in the USA where the certification resides (ILFI, 2015) . However public record only shows buildings classified as non-private so the numbers can soft be more than that. And theres even a larger amount of partially or flower petal certified building s and projects (ILFI, 2015) .. Any one building can simulate a number of certifications, relevant to each individual petal. However if a building is certified within all criteria, it gains a Certified Living Building Certificate, considerably the highest award condition by the LBC.Followed by individual petal certified buildings, these ar structures that have satisfied one or more of the petals, and are roughly likely awaiting a final audit to be fully certified. The final certification is benefit Positive Energy certification, requiring the building to have bear more electricity than calculatedly needed. To achieve net positive energy over course of the year, energy efficient features, electricity generation and passive design are employed.In each section, an analytical and comparative summary of both the LBC and BREEAM will let on how each standard addresses the named criterion. It is nonable that due to the highly comprehensive nature of the LBC, BREEAM will be compared against the LBCs petals and using the standards and descriptions provided under the LBCs handbook. With the end of each petal, and summarizing this section, the author will conduct a summary comparative analysis between both standards, itemization in abbreviated, how each addresses the topics and providing analytical insight into the results.The LBC uses a number of concepts to guide its users through the design and certification process, the terms are derived from miscellaneous sources, references or the creators own research to construct a logic space through which this tool operates.Typology Typology refers to the scope and type of project being conducted, this helps identify what arbitrarys are matched and can be applied to the project.Renovation This refers to either project that is non a complete building on its own, but part of a previous building as an addition or rehabilitation of historic or old structures.Infrastructure + demeanscape This refers to projects that o perate on an open scale, such as parks, amphitheaters, or other civil projects such as public plazas, exercise fields, bridges and so on.Building This refers to projects that involve whole buildings both ones already actual and to include renovations or new ones all together.Community The community challenge applies to a number of structures that coexist together and operate as part of a neighbourhood, community, campus whilst sharing certain amenities such as, but not limited to, roads, green or community areas.Transect The transect concept is an adaptation of the modern Urbanism transect planning approach that was developed and published in the Smart Code manual ( current version 9.2) by the Center for Applied Transect Studies (CATS, 2010). The transect smart code benefits from and adapts Smart Growth and New Urbanism strategies into creating a well divided yet adequately mixed community that supports sustainable growth for community, nature and urban development (Duany, Plater- Zyberk and Company, 2009). In the living building challenge, adequate transects for each project must be identified according to footprint and site scale in order to adapt the appropriate imperatives to adapt the site as such that it is developed to be a productive part of its context.Whilst that approach allows for a natural flow of urban development, imposing guidelines that foil form without function on a city scale causes complications, specifi chit-chaty when applied on a regulatory scale, some documents might be too technical and complicated as to negate architectural design creativity and hinder functions that occupy these buildings. (Garnett, 2013, pp. 571 588). Fortunately within the Living Building Challenge, these concepts are not strictly applied, but are merely regulated in the latest addition in version 3.0 stating that buildings needs to adapt beauty and reflect on their context, but stated exceptions due to local regulations are allowed.Scale Jumping In case the p rojects place petal amenities require space larger than required or there is potential for cooperation, it is possible to scale jump these areas as long as they serve more than one building or site, and as long as theyre off the main project zone.Colour coding in the next section will be used to countenance the start of paragraphs marking ones that include Living Building Standard to differentiate them for the ones comparing with BREEAM.The Living Building Functions as a Certification, accompanied with a pleader manual, used to achieve named certification. It classifies the different categories within to a series of broad umbrellas, or flower petals. apiece petal is composed of a number of relevant criteria, named imperatives. The LBCs categories are divided into seven petals, which encompass a set of comprehensive criteria, the acceptable methods and parameters needed to achieve them. The Petals summarized into the following table reflects the Living Building Institutes vision i nto the main categories that should be addressed to achieve a comprehensive regenerative design according to the LBCs visionPlaceNet Positive WaterNet Positive EnergyHealth HappinessMaterialsEquityBeautyWhilst the set of Petals delegate by the LBC might be considered of a wide scope, it is however a certification and not a technical standard, thus by comparison, BREEAM encompasses more sections, which are different arrange by marginally align with the roles within the LBC.ManagementHealth and benefitEnergyTransportWaterWasteLand Use EcologyPollutionInnovationDespite the larger number of sections, items such as Land Use, Ecology and Transport are embodied within the Place Petal. Waste is segregated and included within the Water and Materials petals, pertaining to organic waste, food waste and construction components. Pollution is divided across all petals, and emphasized within Health Happiness, Place and Materials petals to regulate pollution within surrounding and indoor envir onments. Finally given the LBCs transparency policy, it sponsors a system of declaration and comprehensive calculation and checks regarding each Petal from design to end of life, thus concluding with the Equity and Beauty Petals which are no included within the BREEAM, yet left open ended within the LBC.I. Place PetalThe place petal, formerly the Site petal, is the first of the set, it relates to the projects setting, its site, surroundings, bionomics and is concerned with placing the building its appropriate surroundings. The petal addresses all projects despite scale, surroundings or function, the designer, or design team as stated must go into defining the site appropriately to understand how to protect the sites ecology and restore it post-construction. The Place petal is heavily affected by each sites Living Transect assigned to it, project area or scale jumping and thus the petal guidebook has been rigidly assigned to ensure that all calculations and certifications have been structured. The place petal includes 04 dogmatics, listed brieflyLimits to GrowthUrban AgricultureHabitat ExchangeHuman-Powered LivingThe Imperatives within the Place Petal, as previously mentioned are comparable to some of the criteria listing under the Transport, Ecology and Site sections within the BREEAM backing. Enforcing the regenerative nature of the LBC, this petal sponsors a strategy of ecological preservation and rehabilitation as a result of piece activities. All of which is sponsored by BREEAM however not enforced as rigidly nor is it mandatory, except for the Habitat Exchange petal, reflected in LE 03, minimizing impact on alive ecology. However, it does not enforce a requirement for a net zero or net positive impact on the environment, but rewards based on reducing the negative impact on the environment between a negative to net zero range.Briefly summarized, the comparison between both sets of regulations takes a positive stand against ecological decay, requiring the maintenance of local ecology and further development, not only the mitigation of any further damage or simply reducing the damage caused. Whilst on a small scale, it would benefit local ecology, this strategy has to be employed on a wider scale to start mitigating or reversing global decay of natural environments.However, the lack of exact calculations that would measure the effect of any construction in any existing ecosystem of high or low value, makes it essential that the LBC needs other regulatory systems and assessment tools to supplement and optimize its performance. It is apparent that the application of this section requires the expertise of an ecological specialist for both systems, and would be high in cost. Ultimately as the LBC is a restorative system, it remains consequential to perform this task as part of the metaphorical price of come in on nature.In addition, addressing the Transport section of BREEAM, reflected within Human powered living and the Transects concept of the LBC. The LBC supports walkable communities, the use of bicycles and non-engine operated modes of transportation with the more populated transects, restricting use of cars to commute in and out of these zones. In addition, it requires estimating the need for storages and car parks based on demand, providing accessibility for mobility and the use of human powered transport and finally. away from the effect of that policy on pollution, it does reduce the carbon and energy cost of transportation, such as commute and food miles and ultimately promotes awareness and healthy lifestyles. BREEAM duration advocating similar requirements, too adds the needs for compact urban design, to reduce the need for modes of transportation, rather than regulating these modes of transportation. In summary, the need to address users needs for storage, distances and methods of commute is imperative to reducing the overall pollution and energy impacts of the residing community.Finally, an d exclusively required by the LBC, enforcing a policy of urban agriculture, reducing food miles and a policy to encourage food storage within households sets the LBC apart. One can criticize however that the requirements of farmable land per building footprint are disproportionate to the density of users occupying it and would need to be rectified to meet realistic expectations.II. Water PetalThe water petal governs the production, use and disposal of all fluid and water based materials on site, including potable water, grey water, black water, storm and rainwater harvesting, managing it, storage and disposing of the excess.The water petal only contains one imperative, which is an update from net zero water in version 2.1 to be Imperative 05. Net Positive Water in version 3.0 (LBI, 2015g). In brief, the Net positive water imperative advocates the compatibility between water systems on site and natural water systems depending on site and climate. It states that any water used on sit e must be part of a unkindly loop system where all used water must be captured on site by means of precipitation, rain or storm water collection, grey water treatment or ground water supply if possible. Of course exceptions are made in case of extreme climatic conditions where it is not feasible or where the natural supply cannot satisfy consumption due to user capacity, where an appeal can be made given proper support. In comparison, BREEAM has Wat01-Wat04 criteria (BRE, 2014),, only Wat01 that specifies water consumption is mandatory, with a minimum performance of providing 12.5% of water consumption within the building through closed loop methods and a utmost five credit score for providing 55% or more of consumed water in the building.Similar to BREEAM Wat02 criterion (BRE, 2014), the LBC Water Petal requires monitoring of use evermore over the year, month by month and in detail. Unlike and in a stricter approach than BREEAM however, the water monitoring process is rigid and highly detailed, requires documentation of all production, use and sinks of water in the structure (LBI, 2015g). It to a fault promotes the jump scaling of this imperative to benefit the community, where a cistern or a unified water storage can be shared between multiple sites, the community, ecosystem or agricultural land.Concluding the water petal, due to Englands Koepen-Geiger climate zone being Cfb, one that has an average of 800mm annual rainfall during the whole year (World Maps of Kppen-Geiger climate classification, 2010, Kottek et al., 2006, pp. 259-263), applying an efficient water harvesting strategy would not be a difficult challenge, the problem would arise with treatment and storage specially on smaller sites, which in turn creates opportunities for jump scaling and providing neighbourhood benefit.III. Energy petalJust like the Water Petal, managing resources in the Living Building Standard have taking a developmental step towards net positive, thus as an upgrade from v2.1 of the Energy Petal that advocated Net Zero energy to the new Energy Imperative 06. Net Positive Energy (LBI, 2015a).In summary, the new Net Positive imperative calls for the production of one hundred and five percent (105%) of the projects energy requirement are satisfied on site by sustainable and renewable energy methods on a net annual basis. What adds to this petals challenge, is the need for resilience, the requirement to store energy for emergency in addition to night-time use. The resilience component requires a minimum of 10% of essential lighting load and refrigerator operation for up to a week (LBI, 2015a). A formidable challenge in England due to the low number of sunny hours annually, reaching an average of 1493 hours of sun per year (Current Results Weather, 2015) making the return to solar origins concept adopted by LBC a solution that might not be entirely financially viable.What sets this strategy apart from other assessment methodologies is the prohibiting of combustion, burning of any material, biomass, biofuels, alternative or courtly fuels due to the possibility of harmful gas emissions, as well as the release of greenhouse gases despite how efficient the combustion module is (McLennan, 2010).On the other hand, BREEAM does not ban the use of combustion energy sources, but relies on the relationship between energy use and Carbon Dioxide emissions, which release nitrates and carbon compounds that account for global warming (Johnson, 2009, pp. 165-168). BREEAM aims for a zero carbon approach, with potential for Carbon Negative buildings acting as sinks. Both systems require a twelve-month monitoring pointedness to determine the buildings efficiency when occupied. However, given the authors current research, it is likely a performance gap may be observed due to human use discrepancies that were not accounted for using Standard Assessment Procedure (SAP), and are not adequately measured using the LBCs online calculators.IV. Materials Pet alThe materials petal aims to create a future of materials scrimping that is non-toxic, regenerative and avoid any negative effects on occupants health, the material petal aims to use materials that can be re-used fleck eliminating the concept of construction waste while staying financially viable, functionally efficient and aesthetically pleasing (LBI, 2015c). Due to production costs, sourcing, transportation distance and the general economy, sourcing these materials remain to be a challenge, but the LBC attempts to counter that challenge by creating a guideline to follow that will allow achieving its targets without any negative impacts. The materials petal has been put ahead of the Health Happiness Petal since the outcome of an adequate material petal certification will lead to the final outcome of Health and Happiness.The Material petal is composed of five imperatives that will be briefly discussed and critically compared to the BREEAMs six material criteria and six waste cri teria, both of which are grouped under the Materials Petal in a brief yet comprehensive guideline. The five imperatives are listed as follows,Red ListEmbodied Carbon FootprintNet Positive WasteResponsible attentionLiving Economy SourcingImperative 10. Red List advocated the elimination of worst-in-class materials and chemicals as it dictates, ones with the greatest negative impact to occupant and ecological health. The list includes a large number of petroleum products, polymers and compounds that contribute to volatile organic compounds (VOCs) spreading in construction as well as other harmful chemicals that lead to a number of physiopathological mechanisms, respiratory diseases and disorders they might cause to occupants (Fernndez et al., 2013, pp. 22-27) including but not limited to symptoms such as irritations, coughing and respiratory symptoms, nervous symptoms such as headaches and fatigue, teetotal skin and other symptoms users might take for granted or under-estimate to be prompt yet prove even more harmful on the long run (Wolkoff, 2013, pp. 371-394). BREEAM recognizes the dangers of these materials, and allows their use under certain conditions according to its own tables and conditions under its health and wellbeing section HEA02- Indoor air quality. BREEAM tackles the problem of VOCs (BRE, 2014) by running a pre-occupancy test after end of construction to determine the concentration of contaminants in the structure, and if found within the appointed limits, it grants the points.The C2C methodological analysis is ambition, but calculation methodology does not include energy that goes into rehabilitating that product for reuse, neither does it account for the quality of the product and ability to function adequately (Bakker et al., 2010). Energy input into the different stages of product development, such as transportation which accounts for 90% of some appliances (Llorach-Massana et al., 2015). It is however calculable and would allow for a deeper understanding of the buildings energy and carbon impact by conniving a complete building life cycle from cradle to cradle (Braungart, McDonough and Bollinger, 2007, pp. 1337-1348).This would assess the carbon impact of the building from inception to deconstruction and potential reuse. (Kneifel, 2010, pp. 333-340, Bribin, Capilla and Usn, 2011, pp. 1133-1140).Imperative 12. Responsible Industry and Imperative 13 Living Economy Sourcing and Net Positive Waste are related when it comes to the overall concept, both imperatives call for sustainable, local or national and proper sourcing of materials. Processing has to be transparent and declared, sources from sustainable or renewable sources dedicated for farming or reclaimed through cradle to cradle or recyclable schemes in addition to some materials also known as Carbon Leaks and Carbon Exports (Davis and Caldeira, 2010, pp. 5687-5692, Kuik and Hofkes, 2010, pp. 1741-1748).However, the use of this concept in the UK might be hindered due to limited resources and would extend to the European Economic Area alongside consideration for the expenses and emissions produced by importing.V. Health and Happiness PetalThe uttermost(a) of the published petal handbooks set in version 3.0, containing imperatives 07 to 09, listed as followsCivilized EnvironmentBioPhillic EnvironmentHealthy Interior Environment(LBI, 2015f) This set of imperatives work to provide a psychologically and physically healthy environment for occupants and owners, by creating connections to the surrounding environment (Coon et al., 2011, pp. 1761-1772) and designing and specifying healthy indoor materials.Imperative 07. Civilized Environment and Imperative 09. Biophillic Environments both share common grounds that contribute to psychological and physical health (LBI, 2015f). Both imperatives aim to create a direct connection between indoors and outdoors, a feeling of visual and a level of physical continuity to provide a feeling of joy and freedom (C hing, 1995). Achieving these targets by playing adequate daylight calculations to identify any glare spots and daylight distribution without spaces, allowing sufficient daylight factors within the building (Roche, Dewey and Littlefair, 2000, pp. 119-126), in addition to write up for thermal and visual comfort (Greenup, Bell and Moore, 2001, pp. 45-52), creating connections with the outdoors is an essential requirement in imperative 07 without any possible appeals except for areas of special use or areas that are not frequently occupied.BREEAM had managed to shed a stronger light when it comes to health and wellbeing criteria, by setting rigorous standards for ventilation, daylight factors and ratios and indoor quality (BRE, 2014). It also adopted criteria to provide comfortable acoustic and thermal environments as well as security for its occupants (Novak, Treytl and Palensky, 2007), despite not being mandatory, these criteria do improve user comfort and satisfying them contribute s to outstanding credits.VI. Equity PetalThe Equity petal (LBI, 2015f), introduced in version 3.0 has limited literature, only introduced in the standard guidebook summarizing the latest version, it includes a table of design guidelines needed to be met or complimented to provide a sense of pitity and justice between all users of the project, at any scale, but mostly focused towards the public and living community challenges. This petal is divided into four imperatives and will be briefly described, since they are still under development with no comprehensive guidebooks and are still quite subjective in approach, they will not be given great focus.The petal guidelines tackle issues such as areas, distances, landscape and urban design to give users and pedestrians a sense of worth in surroundings modelled after the human scale and dimensions (Ching, 1995)/ overture to place allows general public usage of spaces created within projects to spread the benefit and eventually awareness to the project and value. Both advocate facilitated access to impaired users, allowing equal opportunities for all users (Thapar et al., 2004, pp. 280-289),Imperative 17. Equitable Investment and Imperative 18. JUST Organizations, both of these imperatives tackle the humane side of building occupancy and donation towards charitable causes. It also includes the need for consideration of users, their needs and humane treatment.VII. Beauty PetalLast of the version 3.0 newly added petals, contains two imperatives Imperative 19. Beauty + Spirit and Imperative 20. divine guidance + Education, both of which cannot be empirically calculated and proven (LBI, 2015f), thus documentation of design literature and efforts made to raise awareness of technologies have been, which reflects on the regeneration standard in the BREEAM. However aesthetic value has not been regarded in BREEAM leaving that particular point out, which could be implied given that it is a technical tool for building perform ance not architectural design.This section will discuss a cross case analysis between two case studies. Each reflecting one of the discussed assessment systems, the LBC and BREEAM. The author found it fitting that due to the main showcase of the LBC reflected in educational buildings, ones that have been developed to be a display and case study for LBC teams, that the cross case analysis would be best done across educational buildings of a similar scale. The LBC case study is an office and commercial complex, commissioned by the environmental protection foundation, the Bullit Foundation. The BREEAM case study is a building of a similar typology, a commercial and office complex, meagerly larger in area and a BREEAM Excellence building, the Exchange in street.Commissioned by the Bullit foundation, an environmental agency with a mission to safeguard the Pacific North Wests ecology from non-sustainable and invasive human activity and raise awareness to the ecological issues that surro und the regions urban sprawl.The building was commissioned under what they believe is the most rigourous standard, that would stand to raise awareness and work as a teaching experience for designers, professionals of the built environment and researchers. Its a commercial office building, with space for various office tenants and a commercial space.The Living Building Challenge is a powerful tool that might hold a number of innovative and important keys towards true sustainability. But due to the vast number of topics covered by it, the LBC requires supporting technical regulations created by local authorities to be applied to differ

Appraisal On Different Aspects Of Project Management Construction Essay

Appraisal On Different Aspects Of Project Management reflexion EssayIt is the purpose of this report to provide a critical appraisal on the development, scope, benefits and influence of object management with bumpicular reference to how custom and physical exercise in dissentent countries can influence the affair and responsibilities of the stand motorcoach.The Project Manager In BriefA realise bus is appointed by a customer who has a befuddle that requires to be implemented. It is the come out four-in-hands duty to solely represent the client and ensure that every last(predicate) decisions and actions ar in the clients scoop inte tranquillitys. The come out manager should ideally be involved at the earliest possible age and his quality is to communicate, lead, organise and delegate from inception of the project to intent of the project. The project manager must communicate primarily with the client, and subsequently lead and organise everyone who has an input on the project found on the clients needs. The project managers duties dont break in thither, governing includes project timeframe and a programme of tend detailing how the work is carried come out. The project manager must delegate each activities or responsibilities to appropriate force-out such as notifying a plumber that a heating pipe requires relocating. It is not the clients debt instrument to tell the avowers what to do, it is the project managers role under the clients instructions.Why Do Clients Need A Project Manager?Project managers ar employed by clients to save them money, time and hassle. Many clients argon un aw are(p) and unsure of twirl procedures, building visualize, twisting courts, building contracts and particularly, managing a project. The project manager at the inception degree of the project, i.e stage A of the RIBA visualise of work, can partake in discussions with the client to obtain the clients ideas, objectives and needs of the project. T his will include primarily, a budget, a timescale, a brief outline of their function requirements such as metres squared of parting space or number of seats in a football stadium. As the client may have had ideas regarding this project for a period of time now, it will be likely they have a particular design scheme in mind, and the feasibility of this scheme can be discussed with the project manager to ensure that client has a realistic design within their sought after budget.Many projects are designed by an intriguer and are taken th gravelly to position operations, i.e part J / K of the RIBA plan of work without any input from an experienced site contractile organ / project manager. This can lead to feasibility / bell issues on site as unfortunately not every architect has the concept of how buildings are constructed in detail. However the try-on of a project manager can eliminate these types of problems prior to site operations as his opinion on the architects proposals can be sought at the planning stage, i.e part C / D of the RIBA plan work.The RIBA Plan of WorkBelow is a list of the various stages of the RIBA plan of work with a small description of the project managers role at each stageA Appraisal Determine feasibility of clients requirements. Design/Cost/Quality.B Strategic Briefing Receive strategic brief from client.C Outline Proposals Develop brief, prepare outline proposal approximate cost.D Detailed Proposals Develop proposal, provide information on cost estimate, consult local authorities, gain approval from client, submit planning application.E Final Proposals Develop proposal to full working sketchs, obtain win cost estimate, obtain approval from client on braid methods, specification cost. Apply for building warrant Advise on a programme.F Production dealing Organise the preparation of a detailed cost such as a bill of quantities quantifying all the required work to enable a contractor to insert rates.G Tender Do cumentation Send out tender documents to main contractor(s).H Tender Action Once authentic the tenders back from contractors, guinea pig compare prices and discuss with client. Select clients preferred contractor based on advice given to client.J Mobilisation Provide any additional information to CDM coordinator and contractor prior to social structure whole caboodle.K Site Operation Site visits, provide further information to contractor as required, review design information received from specializers or contractor. Prepare as built drawings for wellness and safety file. Advise on maintenance of building. Communicate and organise with all project contri andors.L completion Inspect building for defects, provide information for final payment to be made to contractor.M Feedback Study suitability of the buildings design for required use.The project squad can be large in number and each member of the team has different roles to play and time to perform that role. Base d on the higher up stages A to M of the RIBA plan of work the following project team members are involved at the following stagesArchitect A to M Designs, produces drawings, instructs contractor. beat surveyor A to M Provides cost information at outset and detailed bill of quantities at stage G. Measures grammatical reflexion work carried out at stage K to calculate payment to contractor.Project manager A to M Leads, communicates and organises rest of project team.Engineers (Structural / M+E / Civil) D to J Provides detailed geomorphological drawings / expatiate. Advises on services and ground conditions etc.Builder / Contractor D to M Constructs and completes project.Duties, Responsibilities, Tasks Skills of The Project ManagerThe project manager is involved at all five stages of a projectDefining Definition of client objectives and project strategies.Planning Preparation of specifications, schedules and budgets.Implementing Monitoring of site performance of cont ractors and any specialists etc and taking necessity corrective actions.Completing Delivering project output and finalising project input.Evaluation Gaining experience from the project, learning from mistakes / problems to try and improve future performance / organisation.A project manager provides a service to the client to take the clients project idea through to completion. It is the number one priority of a project manager to look by and by the clients best interests from inception of the project to completion. It is his duty to discuss any necessary changes to the project with the client and advise on the possible solutions, the associated costs and the implications of the changes should in that location be any. Having fulfilled this duty it is then up to the client to make the decision and inform the project manager how they wish to proceed.It is his duty to discuss the feasibility of the clients design ideas to ensure construction costs can match the clients set budget. The project manager collects information from the client to make sure their needs are met end-to-end the whole project.The scope of the project managers works is as followsEstablishing clients objectives, priorities, preferences, budget and ideas.Liaise with the client and discuss a feasible design to take to the clients architect. A design which works and can meet the clients budget.Design of project organisation structure, i.e plan construction activities and responsibilities etc.Identify how the client is integrated into the project.Advise on the appointment of contributors to the project, i.e consultants, professionals, contractors etc. Look for those with experience of similar work, with a good reputation, who are available, who can integrate with others and who produce quality work. A large factor in selection can also be their location.Advise client on the Architects proposals and make recommendations based on what the clients objectives and preferences are.Prepare a project programme, i.e who does what, when and for how long. This is a plan of all the construction regalees of the project from start to completion.Establish appropriate information and communication system amidst client and contributing parties. (Contributing parties refers to people / organisations employed by the client such as the architect, engineer or main contractor.) Generally specialists or sub contractors are employed by the main contractor nonetheless this does not mean that communication with them is not key.Monitor design and feasibility. Is the design progressing as per the clients requirements? Is the cost in line with the budget?Play a role in major and crucial decisions regarding construction, budgeting, timekeeping and organisation.Advise on building maintenance and everyday running.Commission the project on completion.In addition to the scope of works above, the project managers general duties, responsibilities and knowledge includeFeasibility studies.Attainment of l and.Planning permission.Outline design.Resource planning.Investment planning.Detailed design.Disposal planning.Contracts.Risk analysis.Many skills are necessary for a project manager to be successful and these are detailed belowLeadership The project manager requires leadership skills to take heading and be confident in his decision making for delegating to the project contributors.Organisation Organisation is critical to a project and a project manager will therefore require elegant skills in this field to ensure all members of the project team know what they are doing and when they are doing it.Integration This is intrinsic as all the other skills can be deemed useless if the project manager cannot integrate with the project team.Delegation Not everything can be relied upon the project manager and it would be impossible for him to do everything therefore he must pass on work, tasks and responsibilities to others.Communication Communication is vital in any construction proj ect and is necessary for any project to be successful.Conflict resolution Making judgement in a dispute surrounded by parties is extremely of the essence(predicate) as in most construction projects there will be some sort of conflict and it is the duty of the project manager to attempt and purport these issues in the first instance.Motivation Construction projects can be repetitive and lengthy and it is key that the project contributors are well motivated to carry out their work and to meet their deadlines.Construction And Project Management AbroadAll of the above refers to custom and practice in project management within the get together Kingdom which differs greatly in other regions of the world such as The United States of America lacquer. Both The USA and lacquer have different procedures and sequences in their construction procedures and therefore this can influence the roles and responsibilities of the project manager.Construction In JapanIn Japan it is very common fo r a client to essay a design from a building contractor, as opposed to the UK where an architect would be appointed in the first instance and a contractor at a later date. This method has both positive and negative points that are worth mentioning. As we know here in the UK, from taking an integrated commence to the supply chain as described in BRE Digest 450, partnership can be a very efficient method of project procurement as the contractor has a say in the practicality of design etc at the beginning. This in theory is no different in Japan except the process is carried out by the majority, rather than the minority here in the UK. As the design is contractor designed, it is very practical using standardised components or standard construction which gives the contractor an extremely buildable project. Generally due to the practicality and standardisation of this method, many of the buildings appear to be very similar lacking attractive intricate details and finesse. Although i n the opinion of many the designs are unexciting, this design and build method sets parameters of the clients need, quality, budget and timescale. This therefore enables the chosen contractor to design a building with the bearing to ensuring that it can be built to the clients desired quality, on time and on budget. Design and build is widely used in the UK but with the lack of standardisation and a simplistic approach to design, cost and time over runs are always inevitable. Japan generally is a quality driven nation and the construction industry within Japan is no different. The contractor market is controlled by the big six, six major construction firms which share long term relationships with their clients, suppliers, specialist contractors, general contractors and sub contractors. The Japanese construction industry is extremely efficient and the construction industry operates with stealth, precision and control of a ninja.Constructing Excellence reported after(prenominal) two trips to Japan having visited five of the big six construction firms that Japan gets a score of 100% for productivity, compared with 50% for the UK. Japan is renowned for its excellent health and safety records and their attitudes to health and safety is pragmatic , it is not a requirement to wear steel toe capped boots when working on a construction site in Japan due the excellent organisation of the project. On the typical Japanese building site theres hardly any debris, so there is little chance of dropping anything on your feet. This seems insane but the figures speak for themselves as 92% of projects in Japan achieve a zero-accident rate, compared with 62% of UK schemes. The differences between UK and Japan are enormous and this can be reinforced further by their training, morning briefing and pre-exercise warm up. It is a requirement for staff to train for a full year before operating on site and there is a briefing at the beginning of each day where the project manager discu sses the days tasks and goals.Project Management In JapanHaving researched the topic of construction in Japan, it is plain to see that the roles and responsibilities of the project manager will differ greatly when compared to those in the UK. In the UK project managers have to deal with a number of individuals in the project team, there may be issues of conflict between the contractor and the architect along with confusion and anger towards cost and timescale of any changes, which can make the project managers job difficult, as it is his responsibility to ensure that work is done on time, on budget and as per the clients requirements. In Japan things are a little different, the designers and the constructors are all part of the same organisation so conflict is unlikely and so is change. The contractor has priced, designed and scheduled the job based purely on the clients needs. The clients need is unlikely to change but should it change the contractor may file for extension to time, additional costs etc which makes this option very unlikely. All in all this makes the project managers life a lot easier and with less time spent on conflict resolution it gives him more time to concentrate on leading, organising, integrating, delegating, communicating and motivating.The project managers role is further improved due to having less young incompetent or inexperienced site workers. Less time is spent repeating himself, as the site workers of Japan have had one years training before starting work on site, therefore are much more competent than the young site workers of the UK who walk on site with little training and experience. Levels of offsite construction and prefabrication is very high and in general due to less erection on site, the project manager should have less complications to deal with and can focus on erecting the prefabricated panels once delivered to site. It is also worth noting that if there are any problems with the prefabricated units if the supplier s fault, for standard wrong dimensions, there is no sample of having to re-erect a panel onsite and wait days for it, instead all that is required is to phone the supplier and they have the stress of rushing out a replacement.Construction Project Management In The United States of AmericaIn the USA, the construction process differs dramatically from both the UK and Japan and subsequently the role of the project manager differs too. The client or developer is generally producing high rise buildings, not for occupation but as a fiscal investment. It is their role produce these large scale buildings at lightning speeds with as low a cost as possible. As a lot of clients are developers with excellent knowledge of the industry, they take the leading role. The architects main role in the project is purely to come up with an outline proposal to meet the clients requirements of appearance, layout and budget. It is not the role of the architect to produce working drawings or detailed desi gn, this is the role of the project engineer. The engineer takes the design and develops it with regard to construction services. In the USA specialist contractors are used to design their own components and install them themselves which ensures there is no conflict which might have been encountered with the main contractor installing an unfamiliar product. Similarly to Japan, a lot of prefabrication is used with the design of a building, for example standardised computer generated components which can be easily be duplicated and altered if necessary rather than drawing everything from scratch. Due to this standardised system full construction drawings can be produced very quickly and there is more certainty of project costing and timescale. Coordination of the project initially is the responsibility of the client. The design stages are organised by the engineer and sometimes the architect. The project manager or construction manager as they are referred to in the USA is responsibl e for organising the specialist contractors work.It is the developers responsibility to monitor the feasibility of the project, especially the architects design and the cost estimates. It is up to the client to ensure that they are aware of any planning authorities as they are responsible for ensuring the legalities of the project.Architects it would seem have a small role to play in the US construction process however it is their role to provide advice on estimated rental value of the property, cost of the build and taxation. It is also the architects role to assess the success of the project based on the above. This reduces the responsibilities of the project manager at the early stages as in the UK it is generally the role of the project manager to provide advice on rental value, rough cost, taxation etc.Similarly to the UK, the construction manager as known in the USA is employed to provide advice and coordinate the construction phase. There are two methods of management used fr om here. The Project manager could be paid a fee for his services and also be paid for employing the specialist contractors whom he has to pay, this method is known as management contracting. The other option is that the client employs the specialists and pays them direct and the construction manager gets paid for managing the project, this is called construction management. In theory it makes no difference to the workload of the construction manager as either way it is his responsibility to ensure that the specialists know what they are required to do. Although an onerous task, it is not any more complex than a large project in the UK. This is due to the fact that the specialist contractors are in theory more than just contractors, they are designers installing their own specialist products and in turn are responsible for their own work under supervision of the construction manager. Although in the UK the project manager is responsible for the key decisions in the project, in the U SA the construction manager delegates these decisions where appropriate to the specialist contractors. The USA is highly driven on completing projects on time and specialists will not hesitate to bring in hired work if necessary which provides an additional requirement for the construction manager to be on the table and coordinate the project contributors.In the USA there is little pre-construction input from a project management point of view and the main role and responsibility is to make sure everyone is one hundred percent sure of what they are to be doing and when it is to be completed. It would appear that the USA get the best out of their specialists with the fell competition and by the way in which they approach a project and are managed.ConclusionHaving researched project management generally, it is evident in my opinion that there is a great benefit in having a project manager on board in a construction project. However having also researched in more detail the ins and o uts of project management in the USA Japan, and comparing it to practice in the UK, it is evident that the differing construction processes in each country dramatically affect the role and responsibilities of the project manager. The benefits of a project manager are endless and in my opinion, the whole scope of the project managers work is all a benefit to both the client and the contractor flat though he is solely representing the client. The project manager is the middle man between the client and the rest of the project contributors. It is a benefit to the client as complex decisions are required when managing a construction site and knowing the lingo is extremely important. alas it would seem that in the UK the clients are not overly experienced with construction therefore its vital that they employ someone who can translate the terms into slope and explain the pros and cons, for example, pros and cons of different options available. This role may be possible to be fulfille d by an architect however the main difference between an architect and a project manager is the project manager spends most of his time on construction sites and has greater experience in project programming, cost implications and construction techniques. The project manager is a benefit to the contractor as with his expertise, solutions to construction issues can be discussed and his advice may be beneficial for speed, cost or even just general ideas.Ultimately it is evident that custom and practice in different countries does affect the role and responsibilities of the project manager. It is crucial for a inexperienced client to have a professional such as a project manager from the beginning of the project if the client wants the project to be finished to his desired quality, on time and on budget.

Fixed and random effects of panel data analysis

Fixed and random effectuate of dialog box info analysisPanel info (also known as longitudinal or cross-sectional conviction-series data) is a dataset in which the behavior of entities ar observed crosswise clipping. With adorn data you can include versatiles at contrary levels of analysis (i.e. students, schools, districts, states) suitable for multilevel or stratified postureing. In this document we focus on two techniques subroutine to analyze bloodshed data_DONE_Fixed effectuateRandom effectsFE explore the relationship between predictor and outcome variable quantitys within an entity (country, person, company, etc.). Each entity has its own singular characteristics that may or may not influence the predictor variables (for example being a male or female could influence the opinion toward certain issue or the political system of a particular(prenominal) country could fool some effect on trade or GDP or the business practices of a company may influence its rai lway line price).When using FE we assume that something within the respective(prenominal) may impact or bias the predictor or outcome variables and we need to control for this. This is the principle behind the assumption of the correlation between entitys misunderstanding term and predictor variables. FE remove the effect of those clock beat- immutable characteristics from the predictor variables so we can assess the predictors win effect. _DONE_An opposite important assumption of the FE bewilder is that those time-invariant characteristics atomic number 18 unique to the individual and should not be correlated with other individual characteristics. Each entity is disparate therefore the entitys error term and the constant (which captures individual characteristics) should not be correlated with the others. If the error terms argon correlated then FE is no suitable since inferences may not be correct and you need to model that relationship (probably using random-effects), th is is the main rationale for the Hausmantest (presented later on in this document).The equivalence for the wintry effects model becomesYit= 1Xit+ i+ uiteq.1Wherei(i=1.n) is the unknown intercept for each entity (nentity- particularised intercepts).Yitis the dependent variable (DV) where i= entity and t= time.Xitrepresents one independent variable (IV),1 is the co cost-efficient for that IV,uitis the error term _DONE_Random effects assume that the entitys error term is not correlated with the predictors which allows for time-invariant variables to play a role as informative variables.In random-effects you need to specify those individual characteristics that may or may not influence the predictor variables. The business with this is that some variables may not be available therefore leading to omitted variable bias in the model.RE allows to generalize the inferences beyond the ideal used in the model.To nail down between repair or random effects you can run a Hausman test wher e the null hypothesis is that the preferred model is random effects vs. the alternative the fixed effects (see Green, 2008, chapter 9). It basically tests whether the unique errors (ui) are correlated with the regressors, the null hypothesis is they are not.Testing for random effects Breusch-Pagan Lagrange multiplier (LM)The LM test helps you decide between a random effects regression and a simple OLS regression.The null hypothesis in the LM test is that variances crosswise entities is zero. This is, no satisfying difference across units (i.e. no card effect). Here we failed to reject the null and conclude that random effects is not appropriate. This is, no evidence of significant differences across countries, therefore you can run a simple OLS regression.EC968Panel Data abstractSteve PudneyISER University of Essex 2007Panel data are a form of longitudinal data, involving regularly repeated observations on the same individualsIndividuals may be people, households, firms, areas, e tcRepeat observations may be different time periods orunits within clusters (e.g. workers within firms siblingswithin couple up pairs)+DONE_ whatsoever terminologyA balanced panel has the same matter of time observations (T)on each of the n individualsAn unbalanced panel has different rime of time observations(Ti) on each individualA compact panel c everywheres only consecutive time periods for eachindividual there are no gapsAttrition is the process of drop-out of individuals from the panel,leading to an unbalanced and possibly non-compact panelA short panel has a large-mouthed number of individuals provided few timeobservations on each, (e.g. BHPS has 5,500 households and 13waves)A long panel has a long run of time observations on eachindividual, permitting separate time-series analysis for each_DONE_Advantages of panel dataWith panel data We can study dynamics The sequence of events in time helps to reveal causation We can allow for time-invariant unobservable variablesBUT rendering between people usually far exceeds variation all over time for an individual a panel with T waves doesnt give T times the learningof a cross-section Variation over time may not exist or may be inflated by meter error Panel data imposes a fixed timing structure continuoustimesurvival analysis may be to a greater extent(prenominal) informativePanel Data Analysis Advantages and ChallengesCheng HsiaoMay 2006IEPR WORKING PAPER 06.49Panel data or longitudinal data typically refer to data containing time series observationsof a number of individuals. Therefore, observations in panel data involve at leasttwo dimensions a cross-sectional dimension, indicated by subscript i, and a time seriesdimension, indicated by subscript t. However, panel data could have a more complicatedclustering or hierarchical structure. For instance, variable y may be the measurement ofthe level of air pollution at station _ in city j of country i at time t (e.g. Antweiler (2001),Davis (1999)). For ea se of exposition, I shall confine my presentation to a balanced panelinvolving N cross-sectional units, i = 1, . . .,N, over T time periods, t = 1, . . ., T._DONE_There are at least three factors contributing to the geometric growth of panel datastudies. (i) data availability, (ii) greater capacity for modeling the complexity of humanbehavior than a single cross-section or time series data, and (iii) challenging methodology.Advantages of Panel DataPanel data, by blending the inter-individual differences and intra-individual dynamicshave several advantages over cross-sectional or time-series data(i) More accurate inference of model parameters. Panel data usually contain moredegrees of granting immunity and more sample variability than cross-sectional data whichmay be viewed as a panel with T = 1, or time series data which is a panelwith N = 1, hence improving the efficiency of econometric estimates (e.g. Hsiao,Mountain and Ho-Illman (1995)._DONE_(ii) Greater capacity for capturing t he complexity of human behavior than a singlecross-section or time series data. These include(ii.a) Constructing and testing more complicated behavioral hypotheses. For instance,consider the example of Ben-Porath (1973) that a cross-sectionalsample of married women was found to have an add up yearly labor-forceparticipation rate of 50 percent. These could be the outcome of randomdraws from a homogeneous population or could be draws from heterogeneouspopulations in which 50% were from the population who always workand 50% never work. If the sample was from the former, each woman wouldbe expected to spend half of her married flavour in the labor force and half out ofthe labor force. The job turnover rate would be expected to be frequent and3the average job duration would be about two years. If the sample was fromthe latter, there is no turnover. The current information about a womanswork status is a perfect predictor of her future work status. A cross-sectionaldata is not able to di stinguish between these two possibilities, but panel datacan because the sequential observations for a number of women contain informationabout their labor participation in different subintervals of their lifecycle.Another example is the evaluation of the effectiveness of social programs(e.g. Heckman, Ichimura, Smith and Toda (1998), Hsiao, Shen, Wang andWang (2005), Rosenbaum and Rubin (1985). Evaluating the effectiveness ofcertain programs using cross-sectional sample typically suffers from the factthat those receiving intervention are different from those without. In otherwords, one does not simultaneously observe what happens to an individualwhen she receives the treatment or when she does not. An individual isobserved as either receiving treatment or not receiving treatment. exploitationthe difference between the treatment group and control group could sufferfrom two sources of biases, selection bias callable to differences in observablefactors between the treatment and con trol groups and selection bias due toendogeneity of participation in treatment. For instance, Northern Territory(NT) in Australia decriminalized possession of small amount of marijuanain 1996. Evaluating the effects of decriminalization on marijuana smokingbehavior by comparing the differences between NT and other states thatwere still non-decriminalized could suffer from either or some(prenominal) sorts of bias. Ifpanel data over this time period are available, it would allow the possibilityof observing the before- and affect-effects on individuals of decriminalizationas well as providing the possibility of isolate the effects of treatment fromother factors affecting the outcome.4(ii.b) Controlling the impact of omitted variables. It is frequently argued that thereal reason one finds (or does not find) certain effects is due to ignoring theeffects of certain variables in ones model specification which are correlatedwith the included explanatory variables. Panel data contain inform ationon both the intertemporal dynamics and the individuality of the entitiesmay allow one to control the effects of missing or unobserved variables. Forinstance, MaCurdys (1981) life-cycle labor supply model under sure thingimplies that because the logarithm of a workers hours worked is a linearfunction of the logarithm of her wage rate and the logarithm of workersmarginal utility of initial wealth, leaving out the logarithm of the workersmarginal utility of initial wealth from the regression of hours worked on wagerate because it is unobserved can lead to seriously biased inference on thewage elasticity on hours worked since initial wealth is likely to be correlatedwith wage rate. However, since a workers marginal utility of initial wealth remain constant over time, if time series observations of an individual areavailable, one can bind the difference of a workers labor supply equationover time to eliminate the effect of marginal utility of initial wealth on hoursworked. The ra te of vary of an individuals hours worked now dependsonly on the rate of change of her wage rate. It no longer depends on hermarginal utility of initial wealth._DONE_(ii.c) Uncovering dynamic relationships.Economic behavior is inherently dynamic so that virtually econometrically interestingrelationship are explicitly or implicitly dynamic. (Nerlove (2002)).However, the estimation of time-adjustment pattern using time series dataoften has to rely on arbitrary prior restrictions such as Koyck or Almon distributedlag models because time series observations of current and laggedvariables are likely to be highly collinear (e.g. Griliches (1967)). With panel5data, we can rely on the inter-individual differences to reduce the collinearitybetween current and lag variables to estimate unrestricted time-adjustmentpatterns (e.g. Pakes and Griliches (1984))._DONE_(ii.d) Generating more accurate predictions for individual outcomes by poolingthe data rather than generating predictions of indivi dual outcomes usingthe data on the individual in question. If individual behaviors are similarconditional on certain variables, panel data provide the possibility of learningan individuals behavior by observing the behavior of others. Thus, it ispossible to obtain a more accurate description of an individuals behavior bysupplementing observations of the individual in question with data on otherindividuals (e.g. Hsiao, Appelbe and Dineen (1993), Hsiao, Chan, Mountainand Tsui (1989)).(ii.e) Providing micro foundations for aggregate data analysis.Aggregate data analysis often invokes the case agent assumption.However, if micro units are heterogeneous, not only can the time series propertiesof aggregate data be very different from those of disaggregate data(e.g., husbandman (1990) Lewbel (1992) Pesaran (2003)), but policy evaluationbased on aggregate data may be grossly misleading. Furthermore, theprediction of aggregate outcomes using aggregate data can be less accuratethan the predi ction based on micro-equations (e.g., Hsiao, Shen and Fujiki(2005)). Panel data containing time series observations for a number of individualsis ideal for canvas the homogeneity versus heterogeneityissue.(iii) Simplifying computation and statistical inference.Panel data involve at least two dimensions, a cross-sectional dimension and atime series dimension. Under normal circumstances one would expect that the6computation of panel data estimator or inference would be more complicated thancross-sectional or time series data. However, in certain cases, the availability ofpanel data actually simplifies computation and inference. For instance(iii.a) Analysis of nonstationary time series.When time series data are not stationary, the large sample approximationof the distributions of the least-squares or maximum likelihood estimatorsare no longer usually distributed, (e.g. Anderson (1959), Dickey and Fuller(1979,81), Phillips and Durlauf (1986)). But if panel data are available,and obser vations among cross-sectional units are independent, then one caninvoke the central limit theorem across cross-sectional units to show that thelimiting distributions of many estimators remain asymptotically normal (e.g.Binder, Hsiao and Pesaran (2005), Levin, Lin and Chu (2002), Im, Pesaranand Shin (2004), Phillips and Moon (1999)).(iii.b) Measurement errors.Measurement errors can lead to under-identification of an econometric model(e.g. Aigner, Hsiao, Kapteyn and Wansbeek (1985)). The availability ofmultiple observations for a given individual or at a given time may allow aresearcher to mystify different mutations to induce different and deduciblechanges in the estimators, hence to identify an otherwise unidentified model(e.g. Biorn (1992), Griliches and Hausman (1986), Wansbeek and Koning(1989)).(iii.c) Dynamic Tobit models. When a variable is truncated or censored, the actualrealized value is unobserved. If an outcome variable depends on previousrealized value and the previous realized value are unobserved, one has totake consolidation over the truncated range to obtain the likelihood of observables.In a dynamic framework with multiple missing values, the multiple7integration is computationally unfeasible. With panel data, the problem canbe simplified by only focusing on the subsample in which previous realizedvalues are observed (e.g. Arellano, Bover, and Labeager (1999)).The advantages of random effects (RE) specification are (a) The number of parametersstay constant when sample size increases. (b) It allows the derivation of efficient10estimators that make use of both within and between (group) variation. (c) It allows theestimation of the impact of time-invariant variables. The disadvantage is that one hasto specify a conditional density of i given x_i = (x it, . . ., xiT ), f(i x i), while i areunobservable. A common assumption is that f(i xi) is identical to the marginal densityf(i). However, if the effects are correlated with xit or if there is a fundamental differenceamong individual units, i.e., conditional on xit, yit cannot be viewed as a random drawfrom a common distribution, common RE model is misspecified and the resulting estimatoris biased.The advantages of fixed effects (FE) specification are that it can allow the individualand/or time specific effects to be correlated with explanatory variables x it. Neither doesit require an investigator to model their correlation patterns. The disadvantages of the FEspecification are (a) The number of unknown parameters increases with the number ofsample observations. In the case when T (or N for t) is finite, it introduces the classical sequent parameter problem (e.g. Neyman and Scott (1948)). (b) The FE estimatordoes not allow the estimation of the coefficients that are time-invariant.In order words, the advantages of RE specification are the disadvantages of FE specificationand the disadvantages of RE specification are the advantages of FE specification.To aim between the two specifications, Hausman (1978) notes that if the FE estimator(or GMM), _DONE_FE, is consistent whether i is fixed or random and the commonly used REestimator (or GLS), RE, is consistent and efficient only when i is indeed uncorrelatedwith xit and is inconsistent if i is correlated with xit.The advantage of RE specification is that there is no incidental parameter problem.The problem is that f(i x i) is in general unknown. If a wrong f(i xi) is postulated,maximizing the wrong likelihood function go out not yield consistent estimator of .Moreover, the derivation of the marginal likelihood through multiple integration may becomputationally infeasible. The advantage of FE specification is that there is no need tospecify f(i x i). The likelihood function will be the product of individual likelihood (e.g.(4.28)) if the errors are i.i.d. The disadvantage is that it introduces incidental parameters.Longitudinal (Panel and Time Series Cross-Section) DataNathaniel BeckDepartment of Po liticsNYUNew York, NY 10012emailprotectedhttp//www.nyu.edu/gsas/dept/politics/faculty/beck/beck home.htmlJan. 2004What is longitudinal data?Observed over time as well as over space.Pure cross-section data has many limitations (Kramer, 1983). Problem is that only haveone historical context.(Single) time series allows for multiple historical context, but for only one spatial location.Longitudinal data repeated observations on units observed over timeSubset of hierarchical data observations that are correlated because there is some tieto same unit.E.g. in educational studies, where we observe student i in school u. presumably thereis some tie between the observations in the same school.In such data, observe yj,u where u indicates a unit and j indicates the jth observation worn-out from that unit. Thus no relationship between yj,u and yj,u0 even though they havethe same first subscript. In professedly longitudinal data, t represents comparable time. extrapolate Least SquaresAn altern ative is GLS. If is known (up to a scale factor), GLS is fully efficient and yieldsconsistent estimates of the standard errors. The GLS estimates of _ are given by(X01X)1X01Y (14)with estimated covariance matrix(X01X)1. (15)(Usually we change by finding some trick to just do a simple transform on the observationsto make the resulting variance-covariance matrix of the errors satisfy the Gauss-Markovassumptions. Thus, the common Cochrane-Orcutt transformation to eliminate serialcorrelation of the errors is almost GLS, as is weighted regression to eliminateheteroskedasticity.)The problem is that is never known in practice (even up to a scale factor). Thus anestimate of , , is used in Equations 14 and 15. This procedure, FGLS, provides consistentestimates of _ if is estimated by residuals computed from consistent estimates of _ OLSprovides such consistent estimates. We denote the FGLS estimates of _ by _.In finite samples FGLS underestimates sampling variability (for normal errors). T he basicinsight used by Freedman and Peters is that X01X is a (weakly) concave function of .FGLS uses an estimate of , , in place of the true . As a consequence, the expectation ofthe FGLS variance, over possible realizations of , will be less than the variance, computedwith the . This holds even if is a consistent estimator of . The greater the variance of, the greater the downward bias.This problem is not severe if there are only a small number of parameters in thevariance-covariance matrix to be estimated (as in Cochrane-Orcutt) but is severe if there area lot of parameters relative to the amount of data.Beck TSCS Winter 2004 Class 1 8ASIDE Maximum likelihood would commence this right, since we would estimate all parameters andtake those into account. But with a large number of parameters in the error process, wewould just see that ML is impossible. That would have been good.PANEL selective information ANALYSIS USING SASABU HASSAN SHAARI MOHD NORFaculty of Economics and Busi nessUniversiti Kebangsaan MalaysiaemailprotectedFAUZIAH MAAROFFaculty of ScienceUniversiti Putra Malaysiaemailprotected 2007Advantages of panel dataAccording to Baltagi (2001) there are several advantages of using panel data as compared torunning the models using separate time series and cross section data. They are as followsLarge number of data lodges2)Increase degrees of freedom reduce collinearity3) Improve efficiency of estimates and4) Broaden the scope of inferenceThe Econometrics of Panel DataMichel Mouchart 1Institut de statistiqueUniversit catholique de Louvain (B)3rd March 20041 text bookstatistical modelling benefits and limita-tions of panel data1.5.1 Some characteristic features of P.D.Object of this subsection features to bear in mind when modelling P.D. Size oftenN ( of individual(s)) is largeTi (size of individual time series) is smallthusN Ti BUT this is not always the case of variables is large (often multi-purpose survey) Sampling oftenindividuals are selec ted randomlyTime is notrotating panelssplit panels _ individuals are partly renewed at each period non independent dataamong data relative to a same individual because of unobservablecharacteristics of each individualamong individuals because of unobservable characteristics commonto several individualsbetween time periods because of dynamic behaviourCHAPTER 1. INTRODUCTION 101.5.2 Some benefits from using P.D.a) Controlling for individual heterogeneityExample state cigarette demand (Baltagi and Levin 1992) Unit 46 american states Time period 1963-1988 endogenous variable cigarette demand explanatory variables lagged endogenous, price, income consider other explanatory variables Zi time invariantreligion ( stable over time)educationetc.Wt state invariantTV and radio advertising (national campaign)Problem many of these variables are not availableThis is HETEROGENEITY (also known as frailty)(remember ) omitted variable ) bias (unless very specific hypotheses)Solutions with P.D. dummies (specific to i and/or to t)WITHOUT killing the data differences w.r.t. to i-averagesi.e. yit 7 (yit yi.)_DONE_CHAPTER 1. INTRODUCTION 11b) more information data sets larger sample size due to pooling _ individualtimedimensionIn the balanced case NT observationsIn the unbalanced case P1_i_N Ti observations more variability less collinearity (as is often the case in time series)often variation between units is much larger than variation withinunits_DONE_c) better to study the dynamics of adjustment distinguishrepeated cross-sections different individuals in different periodspanel data SAME individuals in different periods cross-section photograph at one periodrepeated cross-sections different photographs at different periodsonly panel data to model HOW individuals ajust over time . This iscrucial forpolicy evaluationlife-cycle modelsintergenerational models_DONE_CHAPTER 1. INTRODUCTION 12d) Identification of parameters that would not be identified with purecross-se ctions or pure time-seriesexample 1 does union membership increase wage ?P.D. allows to model BOTH union membership and individualcharacteristics for the individuals who enter the union duringthe sample period.example 2 identifying the turn-over in the female participationto the labour market.Notice the female, or any other segment i.e. P.D. allows for more sophisticated behavioural modelse) estimation of aggregation bias often more precise measurements at the micro levelComparing the Fixed fix and the Ran-dom Effect Models2.4.1 Comparing the hypotheses of the two ModelsThe RE model and the FE model may be viewed within a hierarchical specificationof a unique encompassing model. From this point of view, the twomodels are not fundamentally different, they rather correspond to differentlevels of analysis within a unique hierarchical framework. More specifically,from a Bayesian point of view, where all the variables (latent or manifest)and parameters are jointly endowed with a (u nique) probability measure, oneCHAPTER 2. ONE-WAY COMPONENT REGRESSION present 37may consider the complete specification of the law of (y, , _ Z, Z) asfollows(y , _, Z, Z) _ N( Z_ _ + Z, _2 I(NT)) (2.64)( _, Z, Z) _ N(0, _2 I(N)) (2.65)(_ Z, Z) _ Q (2.66)where Q is an arbitrary prior probability on _ = (_, _2 , _2). Parenthetically,note that this complete specification assumesy _2 , _, _2 , Z, Z (_, Z, Z) _2The above specification implies(y _, Z, Z) _ N( Z_ _ , _2 Z Z0 + _2 I(NT)) (2.67)Thus the FE model, i.e. (2.64), considers the distribution of (y , _, Z, Z)as the sampling distribution and the distributions of ( _, Z, Z) and(_ Z, Z) as prior specification. The RE model, i.e. (2.67), considers thedistribution of (y _, Z, Z) as the sampling distribution and the distributionof (_ Z, Z) as prior specification. Said differently, in the RE model, is treated as a latent (i.e. not obervable) variable whereas in the FE model is treated as an incidental parameter. Moreover, th e RE model is obtainedfrom the FE model through a marginalization with respect to .These remarks make clear that the FE model and the RE model shouldbe expected to display different sampling properties. Also, the inference on is an estimation problem in the FE model whereas it is a prediction problemin the RE model the difference between these two problems regards thedifference in the relevant sampling properties, i.e. w.r.t. the distribution of(y , _, Z, Z) or of (y _, Z, Z), and at last of the relevant riskfunctions, i.e. the sampling expectation of a loss due to an error between anestimated value and a (fixed) parameter or between a predicted value andthe realization of a (latent) random variable.This fact does however not imply that both levels might be used indifferently.Indeed, from a sampling point of view(i) the dimensions of the parameter spaces are drastically different. Inthe FE model, when N , the number of individuals, increases, the i s beingCHAPTER 2. ONE-WAY COMPO NENT REGRESSION MODEL 38incidental parameters also increases in number each new individual introducesa new parameter.

Land Ethics Essay -- essays research papers fc

Land Ethics in Our CommunitiesWhile wading through the reserved reading in the library, I came across the article, The Land Ethic, which caught my eye, as well as sparked an interest deep within me. It revealed the idea that we, as humans, tend to be quite caught up in the idea of community community between neighbors, co-workers, etc. seems to be something we strive for in our society. It seems that we have not integrated the land into our idea of community, and I feel that this is a serious problem that if not treated, will continue to grow and strive until the land turns into the dead nothing many people of at presents society feel it to be. I had been put face to face with the fact that I was one of those careless and self-involved members of our race. Having never thought of the pattern of land ethics, I realized that it is very likely that many other people have yet to know of it either. This is a present conservation problem which worries me more than I have ever thought a simple article could be able to do to me. As the author of this apocalypse piece, Aldo Leopold (1966), stated in his article, that we need to change our human role from conqueror, to a member of the land community(p.). This is vital for the future existence of an Earth that is inhabitable and non-toxic. Many people claim that they have ethics in their work place, or in general life practices. I have yet, however, had the pleasure...