The Theory Of Gentrification Essay Example | Topics and Well Written Essays - 1250 words

The Theory Of Gentrification - Essay Example The theory of gentrification and the rent gap (Smith 1979), suggests there has been a great deal of pressure for change in some parts of the city. This paper argues that history matters to how gentrification unfolds in Boston and this explains the pressures that have led to change in that Boston’s gentrifying neighborhoods. Smith (1979, 538) states that after a period of sustained deterioration, many cities in America are experiencing gentrification of certain central city neighborhoods. He states that the initial signs of revival in the 1950s grew in 1960s and by 1970s had caused widespread gentrification that affected most of the older cities in the country. The earlier issues of sustained deterioration acted that occurred in American cities over time shows a historical aspect that influenced the changes in terms of gentrification in the country. The signs of revival that were recorded in the American cities between the 1950s and the 1960s represent the pressures that led to the cities’ gentrifying neighborhoods. Lewis (1979, 23) states, â€Å"History matters to the structure and look of a landscape. We inherit a landscape, which forms the basis for any changes, or developments we subsequently make. Change itself is uneven (historically lumpy).† Lewis clearly shows that history contributes to the manner in which a landscape changes. A landscape cannot just change without an influence. There must be some past issues that influence how a city changes. The history might be desirable or not but either of them influences how a city changes. If the history is desirable, it will contribute to positive change in terms of improvement from the past. However, if the history is undesirable, it will influence the city to change considerably aiming for desirable outcomes. However, this does not mean that the change must be consistent because generally, change is uneven. In Boston, for instance, history has played a major factor in terms of is gentrification. Originally, the city was a forested land.

Miss Evers’ Boys portrays the emotional effects Essay Example for Free

Miss Evers’ Boys portrays the emotional effects Essay Miss Evers’ Boys portrays the emotional effects of one of the most amoral instances of governmental experimentation on humans ever perpetrated. It depicts the government’s involvement in research targeting a group of African American males (â€Å"The Tuskegee Experiment†), while simultaneously exploring the depths of human tragedy and suffering that result, as seen through the eyes of Eunice Evers. The viewer watches as a seemingly innocuous program progresses into a full-blown ethical catastrophe—all the while taking Miss Evers through a moral journey, with her decisions having ramifications on the life and well-being of her best friends—her â€Å"boys. † I. Structure This movie deals with the ethical considerations present in human experimentation. The government, wanting to mimic the Oslo Experiments, intends to study a population of AfricanAmericans inflicted with syphilis. The movie takes place in alternate settings, transitioning between a 1973 Senatorial hearing and the site of the actual study in Alabama, beginning in 1932 and moving forward. Miss Eunice Evers, a nurse at a local Tuskegee hospital, is the centerpiece of the movie. II. Setting Plot Summary With an ominous lead-in quote, Miss Evers’ Boys begins to tell the tale of an emotionally courageous young woman and her struggle to protect her â€Å"children. † Within the first few frames  of the movie, the viewer is automatically entrenched into the already tenuous history of racial tension in America—except, this time, under the auspices of segregation founded upon disease. The movie begins, placing the viewer as an observer of a 1973 U. S. Senate Hearing, where we are first introduced to Miss Eunice Evers. Miss Evers is testifying as a nurse, one who took the nurse’s oath to protect the health of those in her care. The claimed Senatorial goal is to discover the truth underlying the â€Å"Tuskegee Study. † Miss Evers worked in the study from 19321972. The movie progresses throughout the course of the hearing, with testimony by Miss Evers and reminiscent scenes telling the tale of the study. In the beginning, Miss Evers firmly supports the goal of the initial plan—to provide care and treatment to those suffering from syphilis. â€Å"It was the dawn of a new day,† explains Miss Evers. At this point (pre-study), she believes that the government is sending her patients, and her city, the best funding and medical support available. The viewer is then introduced to Miss Evers’ Boys—a folk music group. 1 The musicians (four of them) are the first patients to provide blood samples, one of them being Caleb, an eventual love-interest of Miss Evers. Each of the men test positive for syphilis. At this point in the movie, everyone (including Miss Evers) is still under that assumption that â€Å"bad blood† is the culprit for the disease. Ultimately, the funding for the initial study disintegrates. After a visit to Washington, various gentlemen confront Dr. Brodus, the head doctor in Tuskegee, with an offer for a new rationale for funding. The gentlemen explain their intentions of studying the African-American population, much like the Caucasian population in the Oslo Experiments (1891-1910). The government then reveals the true nature of the experiment—the proposed study of untreated African-Americans dealing with syphilis. 1 The government promises future treatment and The group names their band after Miss Evers when she drives them to their first musical show. 2 proclaims the future potential of the Tuskegee Experiment, appealing to Dr. Brodus’ pride. Dr. Brodus agrees, naming the study, The Tuskegee Study of Untreated Syphilis in The Negro Male. 412 men, afflicted with syphilis, participate in the study. In a telling interaction involving one of the first patients, Miss Evers suggests that the doctors explain to the study group that they are providing â€Å"back shots. † Through her deceit, Miss Evers thus begins to involve herself in the â€Å"treatment. † The tension she feels manifests itself in her facial features; the viewer can see her apprehension in this instance and throughout the movie. She is torn, but yet continues to help Dr. Brodus conduct the study. As 6-months turns into years, Miss Evers continues to hide the secret behind the study. She urges the men to continue the study, in hope of future treatment—treatment that never comes, even through the eventual availability of penicillin. Miss Evers’ ultimate decision as to how she deals with the care and treatment of her â€Å"boys† will be left to the viewer. With the journey, however, comes a tumultuous story, exposing the hypocrisy of the United States Government through the eyes of Eunice Evers. Throughout the movie, as an audience, we want Miss Evers to defy all conventions and simply provide the necessary medicine to the patients. Yet, she struggles throughout with the pros and cons of such a decision. On one hand, she wants to support the experiment; yet, on the other, she wants to protect and comfort her friends. As we finally see in the end, as seen through Miss Evers’ unique perspective, while one may question Miss Evers, it is the Senators themselves, and the government agents before them, who prove to be more worthy of moral appraisal. III.

Up-Gradient Particle Flux driven by Flow-to-Fluctuation

Up-Gradient Particle Flux driven by Flow-to-Fluctuation Up-Gradient Particle Flux driven by Nonlinear Flow-to-Fluctuation Energy Transfer in a cylindrical plasma device Lang Cui Chapter 1 Introduction and Background 1.1 Fusion 1.1.1 Fusion reaction Nuclear fusion is one of the most promising options for generating large amounts of carbon-free energy in the future. Fusion is the process that heats the Sun and all other stars, where atomic nuclei collide together and release energy. To get energy from fusion, gas from a combination of types of hydrogen – deuterium and tritium – is heated to very high temperatures (100 million degrees Celsius). Controlled fusion may be an attractive future energy options. There are several types of fusion reactions. Most involve the isotopes of hydrogen called deuterium and tritium [1]: So far most promising method for fusion achievement is considered to through reaction by Eqn. (1.3) due to the fact that this reaction needs least energy and has largest nuclear cross section. As shown in Figure 1.1, every fusion reaction can provide 17.6 MeV nuclear energy of which 3.5 MeV is carried by ÃŽ ± particles (helium nuclei) and the rest is carried by the neutron. Since both deuterium and tritium nuclei are carrying positive charges, we need to heat deuterium and tritium to a sufficiently high temperature (~ 10 keV) in order that thermal velocities of nuclei are high enough to overcome the Coulomb repulsion force to produce the fusion reaction. In fact, fusion reaction whether or not can be realized is given by the famous Lawson criterion [2]: is the ion density, showing how good the particles are confined; is the energy confinement time, measuring the rate of the system loses energy to the environment. There also exists a minimum value of the energy confinement time defined as ratio of the total energy of the plasma to power loss []: Figure 1‑1 the schematic of deuterium-tritium fusion reaction 1.1.2 Magnetic Confinement There are two ways to achieve the temperatures and pressures necessary for hydrogen fusion to take place: Magnetic confinement uses magnetic and electric fields to heat and squeeze the hydrogen plasma. The most promising device for this is the ‘tokamak, a Russian word for a ring-shaped magnetic chamber. The ITER project in France is using this method. Inertial confinement uses laser beams or ion beams to squeeze and heat the hydrogen plasma. Scientists are studying this experimental approach at the National Ignition Facility of Lawrence Livermore Laboratory in the United States. Moreover, it is practically impossible to attain in the laboratory density levels near the ones in the star-centers. It is more feasible for controlled fusion purposes to work at low gas densities and increase the temperature to values considerably higher than that in the center of the sun. At these high temperatures all matter is in the plasma state, consists of a gas of charged particles that experience electromagnetic interactions and can be confined by a magnetic field of appropriate geometry. As shown in Figure 1.2, the motion of electrically charged particles is constrained by a magnetic field. When a uniform magnetic field is applied the charged particles will follow spiral paths encircling the magnetic lines of force. The motion of the particles across the magnetic field lines is restricted and so is the access to the walls of the container.[] Figure 1‑2 When a single charged particle subject to a force is presented in an externally imposed magnetic field, the charged particle (ion/electron) will gyrate around the magnetic field lines. At the position of the guiding center, the charged particle will drift with a velocity which can be calculated from the fluid momentum equation, . The force can be due to an electric field ( drift), gravitational field, curvature drift ( drift) .etc. when there is a collection of charged particles, the force can also be a mean pressure gradient which can lead the particles to a diamagnetic drift with . The diamagnetic drift depends to the sign of the charge the particles carried, thus we expect to find a diamagnetic current in azimuthal direction and opposing the original magnetic field. 1.2 Drift wave turbulence and transport 1.2.1 Overview of Drift wave turbulence It is known that drift waves result from the interaction between the dynamics perpendicular and parallel to the magnetic field due to the combined effects of spatial gradients, ion inertia, and electron parallel motion. Here â€Å"drift† refers to the diamagnetic drifts (perpendicular to both density gradient and magnetic field) due to dominant pressure gradient with a small finite and . Derivation of drift wave dispersion relation can be found in many text books and review papers [1-3]. The experimental work performed in this dissertation was considered cool collisional plasma. An assumption is often made that , where is the drift wave frequency, and are the ion and electron thermal speed separately. Since drift waves have finite , electrons can move along magnetic field lines establishing a thermodynamic equilibrium among themselves. While the ion motions can be neglected. As a result, Landan damping is negligible. In absent of resonant particles, phase velocity distributions may reach to a fluid description of electrons and ions. We may apply the 2D fluid model to describe the system. Accounting for the fast gyromotion along magnetic field of the electrons for density and velocity , we have where is the electron pressure and denotes the direction parallel to magnetic field. By taking the limit and, a plane wave solution of the potential, we can then obtain the Boltzmann relation for electrons: where and are the equilibrium electron density and temperature, . The schematics showing the physical mechanism of an electron drift wave can be seen in Figure 1.3. where the density perturbation is positive, the potential perturbation is positive. Similarly, where the density perturbation is negative, the potential perturbation is negative. The resulting electric field will cause a drift in the x direction. Since there is a gradient in the x direction, the drift will bring plasma of different density to a fixed point. Along with the quasi-neutrality condition, we can find the drift wave dispersion: We notice that the drift waves travel with the electron diamagnetic drift velocity. Here the density and potential perturbations are in phase with a zero growth rate. Thus the plasma is stable. Figure 1‑3 Physical mechanism of a drift wave The fundamental property of electrostatic plasma turbulence is the drift wave frequency range in the absence of dissipation is often described by the Hasegawa-Mima Equations [4-6]. However, most experimental plasma condition is collisional like ours. Thus we are introducing a collisional drift-wave model described by Hasegawa-Wakatani equations, which derived from the same density continuity equation and electron momentum equation, but includes the electron parallel dissipation and the modifications of ion-neutral drag [4,7]. In a cylindrical geometry such as our machine, this model is written as two coupled dimensionless equations: where = is the â€Å"adiabatic parameter† and is the normalized ion viscosity. We note here the density is normalized with , the potential with , time with , distance with , gyroradius. Here is the wavenumber parallel to magnetic field, is the electron collision frequency. Typically, the plasma is characterized by the ratio between the spatial scale of the collective modes () and the scale of the plasma (). HW model introduces the two main components to describe a weak drift wave turbulence system: linear instability driving mechanism and nonlinear damping for turbulence saturation. For , parallel collisions are negligible thus the drift waves are linearly stable. Eqn. (1.11) and (1.12) will be reduced to the Hasegawa-Mima model: For , this model goes to the hydrodynamic limit and reduces to the 2D Euler fluid equations. Our experiments condition is satisfied with . In the presence of dissipation of the parallel electron motion (electrons can lose momentum to the background plasma as they move parallel to the magnetic field), the corresponding dissipation will cause a finite phase shift between density and potential fluctuations. As a result of the phase shift, the Boltzmann relation is no longer valid with : Here the phase shift is the key for instability. The dispersion relation becomes: where and . By solving for , we obtain As we can see from Eqn. (1.16), the growth rate is always positive for a limited range of wavenumbers. This can be also understood from Fig. 1-3 that the phase shift causes drift velocity outwards where the plasma is already shifted outward. Hence the perturbation grows. The dissipation of parallel electron motion can occur via several different processes such as wave-particle interactions and electron-ion Coulomb collisions. 1.2.2 Particle transport The energy losses observed in magnetic confinement devices are much greater than predicted by neoclassical transport theory and usually attributed to the presence of small-scale plasma turbulence. It is well known that spatial gradients in the plasma lead to collective modes called drift waves, which have wave numbers in the range of the observed density fluctuations. Drift waves in magnetized plasmas can produce various transports such as particle transport, momentum transport and kinetic energy transport. The magnetized plasma will convect around the maximum and minimum of density variations. [1]F.F.Chen, Introduction to plasma physics and controlled fusion Second edition Volume 1: Plasma (Plenum Press, New York, 1984), second edn., Vol. 1. [2]R. H. L. Hans R. Griem, Methods of Experimental Physics, Part A (Academic Press, New York and London, 1970). [3]F. F. Chen, Phys Fluids 8, 1323 (1965). [4]P. H. Diamond, A. Hasegawa, and K. Mima, Plasma Phys Contr F 53 (2011). [5]K. Mima and A. Hasegawa, Phys Fluids 21, 81 (1978). [6]Z. Yan, University of California, San Diego, 2008. [7]N. A. Gondarenko and P. N. Guzdar, Geophys Res Lett 26, 3345 (1999).

The Grapes of Wrath by John Steinbeck Essay -- farm, tractors, land own

The bright colors and nice shirts all grab your attention at the store, but how did the cotton, grain, or wheat in the products come to be? In Steinbeck’s The Grapes of Wrath, mechanization brings capitalism and other unintended consequences, leads to the decision for land owners of whether to run a business using greed or virtue, and separates the working class. Steinbeck starts The Grapes of Wrath by showing the Joad family who had just been removed from their farm. The Joads are one family of a monstrous number of families to be removed from their farms. They were raised on the land, some died on the land, and they were with approximately seven million families that lived on farms in the same day (â€Å"U.S. AGRICULTURAL POLICY,† 10). The banks told the Farmers’ Association to lower the overhead of all agricultural products by employing possibly one or two men to take the place of sixteen other men. The owner of the land had the choice to both get rich and be extremely wealthy by profiting off the loss and pain of others or to become one who is taken advantage of and becoming hungry and poor. One of the main unintended consequences of employing one man to drive the tractor was a loss of contact to the land. The land owners became completely separated from their land. The people who farmed in the same way as the Joads lived for the land, and they lived because of the land. This relationship between farmer and land was destroyed due to the introduction of the tractor to the land. Land owners no longer knew when they needed to give the land a break, and for this reason many pieces of land became totally dust and truly became unformidable to any type of farming. This overuse of the land led to what we know as the Dust B... ...reed which totally annihilated the working class’s bond of unity. If the working class had united maybe they would not have been so very miserable for such a long time. Maybe the Dustbowl would have never happened. Works Cited â€Å"Article III.† The Harvest Gypsies: On the Road to the Grapes of Wrath. Charles Wollenberg, ed. Berkeley: Heyday Books, 1988. â€Å"Article IV.† The Harvest Gypsies: On the Road to the Grapes of Wrath. Charles Wollenberg, ed. Berkeley: Heyday Books, 1988. Harvey, John, John Crowley, and Jack Hayes. U.S. Government. Department of Agriculture. Face of Rural America. 1975. Steinbeck, John. The Grapes of Wrath. 1939. Eds. Peter Lisca with Kevin Hearle. New York: Viking,1997. Rasmussen, Wayne D.. "The Challenge of Change." Trans. Array U.S. Agriculture in a Global Economy. 1985. "U.S. AGRICULTURAL POLICY." The Reference Shelf. 38. New York: 1966.

Ghost Story of the Landon House Essay examples -- Urban Legends Ghost

Landon House: Urbana, Maryland Urban legends and ghost stories play an important role in society. Supernatural and â€Å"uncanny† events are evident in the folklore of every culture. Stories of the supernatural, such as ghosts and magic, are typically passed down as oral traditions from generation to generation. With the advent of mass media, such as television and the Internet, ghost stories can become easily popularized. The realm of ghost stories and urban legends is divided among skeptics and believers. However, â€Å"the lack of verification in no way diminishes the appeal urban legends have for us,† (Brunvand 2). Whether one believes in ghosts or not, it is not uncommon for some people to blame peculiar happenings on the supernatural. This is not unlike the unexplained chill that goes up you spine or makes the hair stand up on the back of your neck. Regardless whether a ghost story is fantastical or ostensibly based in truth, the overall impact of the story on the listeners depends on t he delivery of the orator. When prompted for a ghost story or urban legend of our town, my girlfriend pointed to the Landon House as a source for several ghost stories and supernatural happenings. I was told this story while driving back from the movie theater at about one A.M. The route back to our homes ironically leads past the Landon House. We both also live approximately one mile from it. As we turned off the highway, onto the deserted back roads, she began the story: For as long as anyone can remember, late at night at the Landon house a white figure of an old woman carrying a candle has been seen walking through the hallways of the second floor. Passersby claim to witness the flicker of a candle in a window long after the fina... ... story and compare it to those that already exist. As any story gets passed along, the minor components will always vary with the stable elements will remaining the same. The symbols in the Landon House ghost story, specifically the old woman, the civil war soldiers, and the dogs, show that our society believes that repeated actions transcend time, that death leaves its mark, and that disturbing the peace of spirits tends to â€Å"awaken† them. Works Cited Brunvand, Jan Harold. The Vanishing Hitchhiker: American Urban Legends & Their Meanings. New York: W. W. Norton, 1981. Cannon, Timothy L., Nancy Whitmore. Ghosts and Legends of Frederick County. Frederick, Maryland: Studio 20 Inc., 1979. Dunne, Patrick. "Ghost Stories Haunt Landon House." The Frederick Newspost 27 Oct. 2005. 6 Apr. 2008 http://www.gazette.net/stories/102705/newmnew200912_31894.shtml.

The Dynamics of Power in South Africa and Palestine :: South Africa Palestine Power Essays

The Dynamics of Power in South Africa and Palestine For over a hundred years, whites consolidated their power in predominantly black South Africa. In the last fifty years, Israelis have played a major hand in dispersing and oppressing the Palestinian people. Edward Said believes that â€Å"The relationship between Occident and Orient is a relationship of power, of domination, of varying degrees of a complex hegemony† (Orientalism 133). Though the geographic reference of this quotation seems less applicable to South Africa, Said’s intuition into the complexity of race relations between oppressors and the oppressed still rings true. Nadine Gordimer’s two short stories, â€Å"Once Upon a Time† and â€Å"The Moment Before the Gun Went Off,† and Edward Said’s work â€Å"After the Last Sky: Palestinian Lives† describe the power structures in South Africa and Palestine, respectively. Both authors clearly depict situations in which one group wields disproportionate authority in its relationship with another group. This parallel confusedly meets the oblique disparities between black/white and Jew/non-Jew interaction. In the exclusive context of Gordimer’s two short stories and Said’s piece, the hegemonies in South Africa and in Palestine are maintained in similar fashion, but with greatly differing results. Both black South Africans and Palestinians are forced to live in segregated, poor communities and are subject to dehumanizing legislation. Gordimer’s story, â€Å"Once Upon a Time,† speaks of economic and racial segregation explicitly: â€Å"There were riots, but they were outside the city, where a people of another color were quartered† (Gordimer 25). The classism and condescension of the white residents is clear as they recall with contempt those black robbers who snagged stores of fine alcohol: â€Å"the thieves wouldn’t even have been able to appreciate what it was they were drinking† (27). Moreover, they speak disdainfully of the unemployed blacks who spoiled â€Å"a beautiful suburb† (27) â€Å"only by their presence† (27). As Said painfully depicts, Palestinians find themselves in a very similar position in a system of â€Å"virtual apartheid† (Said 142). He describes the process through which Palestinians are â€Å"herded into new camps† (19) and their â€Å"identity is confined to frightened little islands in an inhospitable environment of superior military force† (19). Said paints a sad picture of the poor and destitute nature of life in the Palestinian refugee camps. Physical and economic segregation leaves both black South Africans and Palestinians on the outside, looking in. A critical difference between the power hierarchies in these two countries lies in the level of integration and the nature of the interaction between oppressors and the oppressed.

Why I Chose Cheer

Simmons 1-6-10 1st block Risky Business Recall an occasion when you took a risk that you now know was the right thing to do. University of Pennsylvania Taking risks is part of life. Some risks don’t end up in your favor, but there can be times where everything works out for you. One such risk for me was trying out for high school cheer. Doing this was taking a chance because making the squad is a difficult task. After being a cheerleader in junior high, I knew this was a serious plunge, but I was eager to take it. Now that I have been on the squad for almost three years, I know it was one of the best choices I’ve ever made. This experience has brought me so much. I’ve learned the importance of teamwork, friendship, and perseverance. Cheerleading exposes you to teamwork at its extremes. When a person is being thrown into the air, there is an immense chance that someone could suffer an injury. To prevent injury, the entire squad must function together and concentrate. Everyone one of us is working to achieve a common goal, which can vary from perfecting our routine to winning a competition. None of us can fulfill our job as cheerleaders on our own. We must all to perform together. Another aspect that is nearly synonymous with teamwork is friendship. When you spend so much time with your squad, you all become extremely close. During practice, you fall short and triumph together, which creates a strong relationship. Unlike football or basketball, everyone plays all the time. No one sits out, and there is no offseason. Whether things are successful or difficult, it’s all a bonding experience. Everything that happens brings you closer to your fellow cheerleaders. Perseverance is a large portion of this sport. You have to be determined to master new skills. There are days that will seem like you can’t quit falling, but you have to keep picking yourself up, which is not always the easy. You’ll want to relinquish, but you have to constantly push yourself to be better and always deliver you best effort. Risk taking is good for you. It may not always turn out the best way possible in your opinion, but it happens every day. Becoming a cheerleader was a great choice, and I’m so fortunate to have made the squad.