2,167 research outputs found
Summary and recommendations on nuclear electric propulsion technology for the space exploration initiative
A project in Nuclear Electric Propulsion (NEP) technology is being established to develop the NEP technologies needed for advanced propulsion systems. A paced approach has been suggested which calls for progressive development of NEP component and subsystem level technologies. This approach will lead to major facility testing to achieve TRL-5 for megawatt NEP for SEI mission applications. This approach is designed to validate NEP power and propulsion technologies from kilowatt class to megawatt class ratings. Such a paced approach would have the benefit of achieving the development, testing, and flight of NEP systems in an evolutionary manner. This approach may also have the additional benefit of synergistic application with SEI extraterrestrial surface nuclear power applications
A Visual Typology of Abandonment in Rural America: From End-of-Life to Treading Water, Recycling, Renaissance, and Revival
The contemporary American rural landscape reflects a mix of ongoing economic changes in agricultural land use, population change, and built environments. The mix depends on past and recent change which represent landscapes of memory and silence to those experiencing economic and demographic renaissance. We develop a typology of five stages that reflect the contemporary rural scene and conduct field transects in Northwest Iowa and Central Maine. Features of the dynamics in rural America are evident in photographs of residences, land use changes, and commercial structure. The study calls for additional studies on rural settlement populations, economies, and society in dierent environmental settings
Wedlocked
For as long as marriage has existed in the United States, divorce has been its necessary opposite. So strong is the need for divorce that the Supreme Court has suggested it is a fundamental right, and every state in the country allows access to no-fault divorce. For opposite-sex couples, legally ending their marriage is possible as a matter of right. For married same-sex couples, however, state DoMAs (Defense of Marriage Acts) have been a stumbling block – preventing access to divorce in some states. Same-sex couples in numerous states are being told by attorneys and judges that they cannot terminate their legal marriage. In a word, these couples are wedlocked.This article proceeds in three parts. Part I will address the question: “Who needs divorce?” The answer: Everyone who is in a legal marriage in which they no longer wish to remain a party. Part I of this article discusses the importance of divorce to married couples who no longer share their lives, and sets out the array of intractable issues that arise when a couple – whether opposite-sex or same-sex – is unable to end a marriage. Part II addresses the question: “Do courts have subject-matter jurisdiction over same-sex divorce?” The answer: Yes. In the vast majority of states, nothing has stripped state courts of general jurisdiction of the power to exercise subject-matter jurisdiction over a same-sex divorce. Part III addresses the question: “Can a court grant a same-sex divorce?” The answer: Yes. Again, the vast majority of state DoMAs neither explicitly nor implicitly prevents a court from granting a divorce to same-sex couples. Part IV takes on the question: “How can a same-sex couple get a divorce?” This Part explains how a court can grant a same-sex divorce by applying the residency state’s divorce statute, the divorce statute of the marrying state, or by granting equitable relief. Finally, Part V asks the question: “Are courts required to grant same-sex divorce?” The answer: Yes. Part V asserts that denying same-sex couples access to divorce violates due process and equal protection. These constitutional provisions require states to provide access to divorce to same-sex couples to prevent them from remaining wedlocked
FEASIBILITY OF AN OKLAHOMA FRESH GREENS AND COWPEAS PACKING COOPERATIVE
Oklahoma's green producers are not benefiting from a growing fresh market. In order to seize the opportunities offered by the growing fresh market for leafy greens, investment in packing facilities have been evaluated. To make use of these facilities during summer months, the addition of a cowpea shelling enterprise is considered. A business plan for a new generation cooperative is estimated using an updated version of "The Packing Simulation Model" (PACKSIM) The business associates PACKSIM with @RISK®, to incorporate risks in the financial analysis.Agribusiness,
Forecasting Police Calls during Peak Times for the City of Cleveland
For a period of time, professors from the Cleveland State University worked closely with the City of Cleveland Police Department. This partnership resulted in access to police records cataloging all emergency 911 calls for the city since 1995. Here, we describe forecasting approaches that can be used by the Police Department based on hourly 911 calls in the years 2001 to 2003 throughout the city during peak call time: the third shift during summer months. This case study is appropriate for class discussions in advanced courses in statistics to explore the application of time series analysis techniques
When Your Body is Your Business
Surrogacy in the United States is a multi-million dollar industry in which well paid professionals seek out highly specialized women to fulfill the difficult job of being a surrogate. Surrogates enter lengthy contracts in which they agree, in intricate detail, to provide a service for significant compensation - surrogates are paid well over $22 million dollars a year. This article argues that surrogates are also professionals in this for-profit industry and are required to report surrogacy compensation as income. As a corollary, surrogates may deduct most of their surrogacy related expenses as business deductions. Being a surrogate is a highly personal service and the expenses the surrogate incurs - such as for maternity clothes or medical care - are typically seen as nondeductible personal ones, but when your body is your business, the personal is business
When Your Body is Your Business
Surrogacy in the United States is a multi-million dollar industry in which well paid professionals seek out highly specialized women to fulfill the difficult job of being a surrogate. Surrogates enter lengthy contracts in which they agree, in intricate detail, to provide a service for significant compensation - surrogates are paid well over $22 million dollars a year. This article argues that surrogates are also professionals in this for-profit industry and are required to report surrogacy compensation as income. As a corollary, surrogates may deduct most of their surrogacy related expenses as business deductions. Being a surrogate is a highly personal service and the expenses the surrogate incurs - such as for maternity clothes or medical care - are typically seen as nondeductible personal ones, but when your body is your business, the personal is business
Cross Border Business Cycle Impacts on the El Paso Housing Market
There is comparatively little empirical evidence regarding the impacts of cross border business cycle fluctuations on metropolitan housing markets located near international boundaries. This study examines the impacts of economic conditions in Mexico on sales of existing single-family houses in El Paso, Texas. Anecdotal evidence suggests that these impacts are fairly notable. Annual frequency data from the University of Texas at El Paso Border Region Modeling Project are used to test this possibility. Results indicate that solid empirical evidence of such a linkage is elusive.Business Cycles, Border Housing Markets
Spheromak formation and sustainment studies at the sustained spheromak physics experiment using high-speed imaging and magnetic diagnostics
A high-speed imaging system with shutter speeds as fast as 2 ns and double frame capability has been used to directly image the formation and evolution of the sustained spheromak physics experiment (SSPX) [E. B. Hooper et al., Nucl. Fusion 39, 863 (1999)]. Reproducible plasma features have been identified with this diagnostic and divided into three groups, according to the stage in the discharge at which they occur: (i) breakdown and ejection, (ii) sustainment, and (iii) decay. During the first stage, plasma descends into the flux conserver shortly after breakdown and a transient plasma column is formed. The column then rapidly bends and simultaneously becomes too dim to photograph a few microseconds after formation. It is conjectured here that this rapid bending precedes the transfer of toroidal to poloidal flux. During sustainment, a stable plasma column different from the transient one is observed. It has been possible to measure the column diameter and compare it to CORSICA [A. Tarditi et al., Contrib. Plasma Phys. 36, 132 (1996)], a magnetohydrodynamic equilibrium reconstruction code which showed good agreement with the measurements. Elongation and velocity measurements were made of cathode patterns also seen during this stage, possibly caused by pressure gradients or EĂ—B drifts. The patterns elongate in a toroidal-only direction which depends on the magnetic-field polarity. During the decay stage the column diameter expands as the current ramps down, until it eventually dissolves into filaments. With the use of magnetic probes inserted in the gun region, an X point which moved axially depending on current level and toroidal mode number was observed in all the stages of the SSPX plasma discharge
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