Atmospheric Stability and Instability

Stability (or atmospheric stability) refers to airs tendency to either rise and create storms (instability), or to resist vertical movement (stability). The simplest way to understand how stability works is to imagine a parcel of air having a thin, flexible cover that allows it to expand but prevents the air inside from mixing with the surrounding air—as is true of a party balloon. Next, imagine that we take the balloon and force it up into the atmosphere. Since air pressure decreases with altitude, the balloon will relax and expand, and its temperature will therefore decrease. If the parcel were cooler than the surrounding air, it would be heavier (since cool air is denser than warm air); and if allowed to do so, it would sink back down to the ground. Air of this type is said to be stable. On the other hand, if we lifted our imaginary balloon and the air within it was warmer, and hence, less dense than its surrounding air, it would continue to rise until it reached a point where its temperature and that of its surroundings were equal. This type of air is classified as unstable. Lapse Rates: A Measure of Stability But meteorologists dont have to watch a balloons behavior every time they want to know atmospheric stability. They can arrive at the same answer simply by measuring the actual air temperature at various heights; this measure is called the environmental lapse rate (the term lapse having to do with temperatures decline). If the environmental lapse rate is steep—as is true when the air near the ground is significantly warmer than the air aloft—then one knows the atmosphere is unstable. But if the lapse rate is small, meaning theres relatively little change in temperature, its a good indication of a stable atmosphere. The most stable conditions occur during a temperature inversion when temperature increases (rather than decreases) with height. The easiest way to determine atmospheric stability at a glance is by using an atmospheric sounding. Edited by Tiffany Means.

American Dream in A Raisin in the Sun by Lorraine Hansberry

Picture this: A husband and wife, two kids, a dog, and a nice house with a white picket fence. This was the cliche American dream. It is what most people think of when they think of the American Dream. The definition of American dream is the ideals of freedom, equality, and opportunity traditionally held to be available to every american. Well does it exist? If people work hard enough towards the dream yes, it does still exist. Moving on from the big picture, two contributions of the American dream are personal happiness and material comfort. For example, material comfort and personal happiness in A Raisin in the Sun is Mamas dream of her buying a nice house with a yard Travis could play in during the summertime also with a nice little garden for herself and money gets put away towards Beneathas school.(Hansberry 44) That is her dream that she will be able to achieve when the check arrives. But, she wants a nice house in a white neighborhood while she has a small apartments now. Mama wants a yard where Travis can play, not play with a rat in a concrete jungle. She also is going to pay for Beneathas medical schooling which she couldnt pay for before the check arrived. Another example of personal happiness and material comfort is in the article  ¨Dream Believer. ¨ Milt Campbell was the  ¨First African American to win Olympic decathlon... he had also been a noteworthy swimmer, professional football player, motivational speaker...and is known for positive attitude. Those wereShow MoreRelated The American Dream in A Raisin in the Sun by Lorraine Hansberry1020 Words   |  5 Pages â€Å"Check coming today?† The Life Insurance check that Mama will soon be receiving is the source of all the dreams in the Younger family. A major argument that Lorraine Hansberry makes in her play A Raisin in the Sun is the importance of dreams. Dreams are what each member of the Younger family is driven by. Mama wants to have her own home in a nice part of town; she does n ot want her children growing up in a place with rats. Walter wants to have a successful business so he can surpass the povertyRead MoreChasing the American Dream in A Raisin in the Sun by Lorraine Hansberry972 Words   |  4 Pages Chasing the American Dream in A Raisin in the Sun A Raisin in the Sun is a play about an African-American family living on the South Side of Chicago in the 1950s. This family is going through many struggles, both within the family and financially. The family is awaiting an insurance check. The story focuses on the individual dreams of each family member and what they want to do with the money. The family struggles to mend their family issues along with deciding what they will do with the money.Read MoreEssay on Compare Contrast a Raisin in the Sun1026 Words   |  5 PagesCompare and Contrast A Raisin In The Sun Essay In the play, A Raisin in the Sun, by Lorraine Hansberry, and 1961 movie written by Lorraine Hansberry and presented by Columbia pictures, one of the most important themes is the American Dream. Many of the characters have hopes and dreams. They all strive towards their goals throughout. However, many of the characters have different dreams that clash with each other. Problems seem to arise when different people’s dreams conflict with one anotherRead MoreLorraine Hansberrys A Raisin in the Sun1260 Words   |  6 Pagesinevitable, people still dream of catching a mirage. There is a fine line that separates those who are oblivious to this fact, and to those who are aware and accept this knowledge. The people who are oblivious represent those who are ignorant of the fact that their dream will be deferred. This denial is the core of the concept used in A Raisin in the Sun by Lorraine Hansberry. The perception of the American Dream is one that is highly subjective, but every individual dream ends in its own defermentRead MoreThe Great Playwright s Life Story2415 Words   |  10 PagesBefore the relatively short life of Lorraine Hansberry tragically ended, the African-American playwright distinguished herself in American theatre and literature as she creatively and unknowingly challenged the views of African-American life, among other inescapable issues of the nation and the world, on the theatrical stage. The great playwright’s life story began on May 19, 1930. Although born during a time of hardship introduced by the Great Depression, Hansberry grew up rather comfortably in a middle-classRead MoreTimeless Themes A Raisin in the Sun by Lorraine Hansberry1306 Words   |  6 PagesOne of the most notable plays on the topic of racial minorities and family issues, A Raisin in the Sun by Lorraine Hansberry, has continued to be popular since it was written in 1959. The play is about an African American family, consisting of five members, who live i n Southside Chicago during the post-World-War-Two era. The Younger family is crowded in a tiny, worn, and shabby apartment and they are fairly poor. They never have much surplus money until Walter’s father, and Mama’s husband, died andRead MoreGreat American Play By Lorraine Hansberry Essay1476 Words   |  6 PagesIntro: Opportunity and inequality have been portrayed in America since It’s existence. In this great American play written by Lorraine Hansberry, A Raisin in the Sun, Opportunity for the Younger family is being told without the death of a relative or family member, money will always be a complication when reaching for higher possibilities. As, said in the second paragraph of the Declaration of Independence, â€Å"We hold these truths to be self-evident, that all men are created equal.† But if all menRead More Racism and the American Dream in Hansberry’s A Raisin in the Sun1340 Words   |  6 PagesA Raisin in the Sun is written by a famous African- American play write, Lorraine Hansberry, in 1959. It was a first play written by a black woman and directed by a black man, Lloyd Richards, on Broadway in New York. The story of A Raisin in the Sun is based on Lorraine Hansberry’s own early life experiences, from which she and her whole family had to suffer, in Chica go. Hansberry’s father, Carol Hansberry, also fought a legal battle against a racial restrictive covenant that attempted to stop African-Read MoreRacial Segregation, By Lorraine Hansberry1248 Words   |  5 Pagesbut dreams – but He did give us children to make the dreams seem worthwhile,† once stated by Lorraine Hansberry. Racial segregation has been a huge topic in our society. Believe it or not, just a few decades ago African American people did not have the basic equality rights that white citizens were given. Something as simple as having a dream to become an author seemed out of reach; even impossible some might have said. Living in this kind of a world was unfortunately a reality for Lorraine HansberryRead MoreLorraine Hansberry1192 Words   |  5 PagesLorraine Hansberrys A Raisin in the Sun The characters in Lorraine Hansberrys play are very significant in understanding the play. The characters are examples of they way Lorraine lived day by day her live when she was a kid. The success of the play was brought out by the characters and her way of keeping our interest with each one of them. They characters are very critical in understanding the play. There were four main characters that made the play a sellout, Lena, Ruth, Beneatha and Walter

The Patriot Movie Free Essays

The Patriot Movie The Patriot movie has been a great movie. All the scenes were incredible and others were devastating. Having to watch this history movie has become one of my favorite movies with the scenes that I have chosen. We will write a custom essay sample on The Patriot Movie or any similar topic only for you Order Now My first scene I chose was actually a very sad part of the movie. It was when Benjamins 2nd oldest son was shot by one of the British cruel leaders. He was killed because he was trying to free his oldest son Gabriel and was shot instead. After that, Benjamin became upset because the British leader ended up ordering to kill the wounded American’s and burned his house down. He got his sons, the guns and went after them to get his oldest son. They ended up killing all the soldiers and made sure they all died and ended up freeing his son from getting executed. The reaction I got from this part of the movie was very shocking that they would kill a kid and burn down a whole house. It’s also shocking that they were allowed to do all that. What I liked about it though was that he went after his son and did not care about what he had to do, he just had to decide it and go after it. The second scene I chose was when Gabriel went to the church and tried to ask for people to join. At the church the pastor asked for him to leave and was trying to make him leave but he wouldn’t. Anne, his future wife ends up helping him and convinces everyone to let him talk and started talking about how everyone is always talking about helping, independence and freedom. That they should act upon what they believe and help. After all that I like that he asked her father if he can write to her while he is at war. My reaction to this was very interesting how she defended him and actually helped him get the people’s attention. How she spoke up to everyone and just what was her opinion and what she thought was right. I just felt it was right and that she used her freedom of speech and spoke up The third scene I have chosen was when Benjamin tricked the soldiers and took his back by talking to the British commander. Tavington got very angry and found out about 7 soldiers homes and went after Benjamins family. His family ended up noticing and hid, some of the American soldiers showed up and took his family while others fought the rest of the British soldiers. By this time I was really interested in this part and was glad that they ended up hiding. I was shocked most of the movie but this part was another main one. It was shocking when I was expecting them to catch one of his younger sons under the table. The fourth scene would be when Gabriel’s wife goes home after their marriage and shows up to the British soldiers gathering her whole village in a temple. The soldiers locked them in and burned it. Later on Gabriel went and found everything and could not find his wife so he went after Tavington and ended up getting killed by him. I felt so sad when this happened. I was very confident at first, happy that Tavington was getting killed until he turned around and stabbed Gabriel. A Very disappointing feeling and shocked once more. The last and fifth scene was when they were all fighting against each other. And most of his close soldiers were dieing and when he found Tavington they got into a big fight. Tavington almost killed Benjamin, but Benjamin ended up switching it around. I knew it was going to end in a positive way but at that moment I was just curious of what else could of happened. I didn’t think that Benjamin was going to get out of that death and it shocked me the most. Very shocking movie. My reaction to this whole movie was a lot of twisted feelings. It was a very sad, shocking movie and I couldn’t really predict on what would happen next. It has to be one of my favorite war movies and I’m glad I watched it. I would definitely recommend it to someone who was in a history class to watch it. I’m glad it ended in a good note and was just surprised in all the twisted things it had and was just disappointed on who did not make it to the end. A good movie, with a good end. How to cite The Patriot Movie, Papers

Zero Energy Project In Home Construction †MyAssignmenthelp.com

Question: Discuss about the Zero Energy Project In Home Construction. Answer: Introduction The zero-energy building is the total amount of energy which has been used by the building based on the amount of renewable energy. This tends to contribute towards the less overall greenhouse gas to the atmosphere. The net zero energy has been mainly about the energy which is for the operations that handles the consumption related to daily energy with maintenance. Along with this, all the energy related to the wastes and the disposals is evaluated for the on-site supply. (Attia et al., 2013). This also means that big savings for the bigger profit and buyers for the construction business. The concept of zero energy project also has many resources for the cost effective zero energy home in building as well as in design. Low carbon construction materials The low carbon bricks, green concrete, green tile and the recycled metals are some of the possible materials for the low carbon construction. The low carbon buildings have been mainly for reducing the emissions of the GHG (Green House Gas) which is mainly released at the time of construction, operation, renovation and the deconstruction process. Hence, the materials which are required for the manufacturing needs to be properly used with recycling the same, reducing the material quantity. The usage of the solar, wind, low impact hydro is some of the measures which could be able to reduce the emissions of GHG. A proper development and usage of the green power, carbon offsets and the GHG reductions help in measuring and handling the reports to reduce the building emissions with adopting the strategies which are effective. To accomplish the effective use of energy along with zero energy design completely departs in significant manner from traditional construction practice. (da Graa et al ., 2012). There is sophisticated 3D based building energy focus on the low carbon bricks with the rolling out for the mass production where the fly ash is a fine glass powder which consists of silica, iron and alumina. The green concrete is to form the conventional concrete that has been mainly set with the different by-products. (Deng et al., 2014). They are substituted with the aggregates of the washed copper slag, granite by the recycling with demolished debris. There is a proper recycling of the metals with production process that is highly carbon intensive. The life cycle performance of metal products could be set to reduce the production energy with working over maintaining the properties. The utilisation of the metal products without completely recycling helps in re-moulding to the different and new products like the columns of the steel or any beam. Innovative construction process The innovative construction process could be through minimising the material which is used for the construction with completely recycling and reusing the product. This is set with effectiveness and working towards the use of the renewable energy. Some of the innovation could be in the grid optimisation, storage of energy and working over the connections where the electricity is produced from the natural gas or the electric standards. They are for the on-site energy generation which tends to exceed the building energy requirements where there has been excess of the production offsets with excess demands that results in the net energy consumption which is 0. Since almost 41% percent of energy used in US is for the buildings, if net zero energy building become utterly ubiquitous, there will be a major decrease in US consumption of fossil fuel energy (Doiron et al., 2011). The use of the designs like the high-performance envelopes, air barrier systems, daylighting, sun controlling and shading devices. A proper evaluation needs to be for the passive solar heating and the natural ventilation as well. This will further immensely reduce the environmental damage and assist in reducing the greenhouse based gas emissions. To ensure people completely acknowledge the threat associated with climate and therefore the importance of net zero energy construction comes into picture. Management of operative energy consumption and consumption behaviour It is important to focus on the non-domestic buildings which account for the carbon dioxide emissions. Here, the consumption could be from housing both the energy supply and the household demand for energy. This could be managed through the energy efficiency which is affected by building an envelope and appliances along with installing the heating and cooling systems. The effective management of the energy systems and the appliances operate in home with the decarbonisation of the energy supply. This is important for the for the generation and storage options. The smart grids effectively take hold of the small-scale generators into the network. The housing energy performance works over the number of factors which include the airtightness of shell, insulative capacity of the shell, thermal bridging, heating and cooling of the systems. For passive house, a building need to focus on the different conditions like the designing and the material. The total primary energy consumption for hea ting, hot water and electricity should be more than 120Kwh/m2 (Kapsalaki and Leal, 2011). The central heating, ventilation and the air conditions system (HVAC) is considered to be used in the large buildings with the major impact on the space heating, cooling and the ventilation demands. This is set to achieve the higher energy performance with time sensitivity to the building heating and cooling the energy needs. The energy evaluation methodology is based on quantifying and working over the assess of effectiveness and economic benefits. This will help in setting the barriers to the energy savings as well. Choice of renewable energy systems The solar photovoltaic is considered the clean and the cost competitive energy source which is considered important for the PV panels. This also require a lesser maintenance where the technology is attractive with costs of PV systems that tends to decrease in the recent times. They are also for building and occupy the unused rooftop areas. The use of the car parking space is set with producing the energy with proper protection to the cars and the individuals. Here, PV installation is to integrate the building architecture with building integrated photovoltaics. They are depending upon how the system will be able to cover the energy needs of the building. This also includes the different technical potential which cover 50% of the rooftops with photovoltaics. (Leckner and Zmeureanu, 2011). Moreover, the concept of daylighting along with skylights can further provide hundred percent of daytime illumination within the parameters of home. Night-time illumination is normally done with LED based lighting that uses almost one third or even less power than any incandescent lights without adding any unwanted level of heat (Torcellini, et al., 2006). Recycle and reuse The main of the concept is sustainable construction along with green building and sustainable architecture which is used with resources in a more effective manner and also reduce the building negative influence on the culture. (Marszal et al., 2011). There are some of the unique things which could be recycled or reused like the wooden wall panel, stackable chairs, doors, shelving and the green roof plants. The main goal is to incorporate the sustainability through the lifecycle of renovation with the reduced carbon footprint to achieve the net zero energy goal. The renovation in the building will be also for the promotion of best practices in sustainability and creative recycling. (Thomas and Duffy, 2013). With the renewable, onsite thermal energy, there are some effective use of biomass and the other similar products which could be used for the space heating, service water heating etc. The zero-waste landfill is about the diversion of the waste from the disposal for the landfill. The business is about the handling the waste with reducing the material consumption and waste with proper reusing of the materials, recycling, compositing and using the different anaerobic digestion. This will facilitate a proper designing and managing of the products and processes in an effective manner. Conclusion The concept of net zero energy performance along in high performance homes take help from a number and kind of materials as well as construction practices which is not found in the traditional form of construction. The designers as well as the architects may or may not discuss specific energy based details or can further neglect to make specific decision associated with the energy based performance strategies at the time of design phase and the outcome is with the added costs for the builders (Voss et al., 2011). For gaining success in zero energy projects, the designers and architects together with construction team must get familiar with all the steps to cost effective zero energy home construction and pay special significance to design strategies along with discussing them in detail on the design plans as required. References Attia, S., Hamdy, M., OBrien, W. and Carlucci, S., 2013. Assessing gaps and needs for integrating building performance optimization tools in net zero energy buildings design.Energy and Buildings,60, pp.110-124. da Graa, G.C., Augusto, A. and Lerer, M.M., 2012. Solar powered net zero energy houses for southern Europe: Feasibility study.Solar Energy,86(1), pp.634-646. Deng, S., Wang, R.Z. and Dai, Y.J., 2014. How to evaluate performance of net zero energy buildingA literature research.Energy,71, pp.1-16. Doiron, M., OBrien, P.E.W., Athienitis, A. and Eng, P., 2011. Energy performance, comfort and lessons learned from a near net-zero energy solar house.ASHRAE Transactions,117(2), pp.1-12. Kapsalaki, M. and Leal, V., 2011. Recent progress on net zero energy buildings.Advances in Building Energy Research,5(1), pp.129-162. Kolokotsa, D.E.K.D., Rovas, D., Kosmatopoulos, E. and Kalaitzakis, K., 2011. A roadmap towards intelligent net zero-and positive-energy buildings.Solar Energy,85(12), pp.3067-3084. Leckner, M. and Zmeureanu, R., 2011. Life cycle cost and energy analysis of a Net Zero Energy House with solar combisystem.Applied Energy,88(1), pp.232-241. Marszal, A.J., Heiselberg, P., Bourrelle, J.S., Musall, E., Voss, K., Sartori, I. and Napolitano, A., 2011. Zero Energy BuildingA review of definitions and calculation methodologies.Energy and buildings,43(4), pp.971-979. Thomas, W.D. and Duffy, J.J., 2013. Energy performance of net-zero and near net-zero energy homes in New England.Energy and Buildings,67, pp.551-558. Torcellini, P., Pless, S., Deru, M. and Crawley, D., 2006. Zero energy buildings: a critical look at the definition.National Renewable Energy Laboratory and Department of Energy, US. Voss, K., Musall, E. and Lichtme, M., 2011. From low-energy to Net Zero-Energy Buildings: status and perspectives.Journal of Green building,6(1), pp.46-57.