Evidence for new unidentified TeV gamma-ray sources from angularly-correlated hot-spots observed by independent TeV gamma-ray sky surveys

We have examined the directional cross-correlation of statistical `hot-spots' between a Northern Sky TeV Gamma Ray Survey by the Milagro Observatory and a similar survey by the Tibet Array. We find the directions of these hot-spots are angularly uncorrelated between the two surveys for large angular separations (Delta theta > 4 degrees), but there appears to be a statistically significant correlation between hot-spot directions for Delta theta < 1.5 degrees. Independent simulations indicate the chance probability for the occurrence of this correlation is approximately 10^-4, implying the existence of one or more previously unobserved TeV gamma-ray sources in these directions. The data sets are consistent with both point-like sources or diffuse sources with extent of 1 - 2 degrees.Comment: 12 pages, 2 figures, 3 tables. Submitted to Astrophysical Journal Letter

An optimal controller based on linear approximation of an acoustical test facility, part B Final report

Optimal digital controller based on linear approximation of acoustical test facility, for determining effects of supersonic rocket engine noise on vehicle surfac

Classical Robustness of Quantum Unravellings

We introduce three measures which quantify the degree to which quantum systems possess the robustness exhibited by classical systems when subjected to continuous observation. Using these we show that for a fixed environmental interaction the level of robustness depends on the measurement strategy, or unravelling, and that no single strategy is maximally robust in all ways.Comment: 8 Pages, 2 figures, Version 2. Minor changes to wording for clarification and some references added. Accepted for publication in Europhysics Letter

Shock wave interaction with porous compressible foams

Two foams, a polyether (density 32.5 kg/m3) and a polyester (density 38 kg/m3) foam were tested in a shock tube to analyze the interaction of a normal shock wave and a compressible porous material. The foam specimens were placed in the shock tube test section! the foam being bounded by two steel walis, two glass windows and a solid back plate. The compression chamber of the shock tube was pressurized and the diaphragm separating the compression chamber and the expansion chamber was ruptured, thus producing a normal shock wave which travels down the shock tube and strikes the foam. Piezoelectric pressure transducers 'vvera used to record the pressure before, alongside and behind the foam. A complete set of schlieren photographs, recording the interaction of the incident shock wave and the porous material were taken for each foam. A method ,tortracking the path of particles of foam (path photographs) was developed. Combining the information obtained from the pressure records, schlieren photographs and path photographs a complete picture of the shock wave foam interaction was developed. All the gas waves were identified and analyzed, A foam wave (velocity 90 m/s) travelling through the skeleton of the material was discovered. A physical model was developed to explain the high pressure recorded behind the foam. This model is based upon the foam being compressed and forming an almost solid piston, thus forcing the trapped gas into a diminishing volume and creating a high pressure behind the foam. The theoretical analyses of Monti (30), Gel'fand (20) and IBvozdeva (22) were analyz.ed and compared. The general finding was that for the range of incident mach numbers 1.~i1 to 1.46 Monti's analysis under predicts the reflected Mach number by 3 % and Gel'fand's analysis over predicts the reflected Mach number by 6 %. The coefficient of pressure increase (the ratio of the maximum pressure recorded behind the foam to the equivalent pressure recorded during ~he reflection of a shock wave from a solid wall) as predicted iJy Gvoz.deva's ane.lysisfor the polyether foam lies wjthin the scatter of the experimental results. However for the polyester foam Gvozdeva's analysis under predicts the coefficient of pressure increase by 15%.GR 201

How Richard and Wanda Help Me Teach a GL-D-flagged First Year Seminar

My goal was to design an FYS that challenges students to ponder deeply about issues of race, ethnicity, gender and other diversities via a means infused with a léger de main. Comedy Cubed (which this year morphs to Of Humanity and Humor ), most of the time, succeeded in doing this. I will be sharing assignments, including stand-up video clips, student comments, and, hopefully, Hope College junior Brother Chris Jones, who served as a TA

A-2 Intimate Partner Violence and Substance Abuse: Male and Female Perpetrators

Domestic violence has been a pervasive, long-standing problem in our society, likely for as long as society has been around. In the United States, it wasn’t until 1871 that the first state (Alabama) rescinded the “husbandly” right to physically punish their wives. Societal views on relationship violence have since changed significantly. Male perpetrators of intimate partner violence have been the focus of studies since the 1970’s when domestic violence started gaining attention in literature and in popular culture. Contrary to popular belief, females have been found to be more likely to initiate violence. Female intimate partner violence perpetration rates have been found to be equal or higher than males in some studies. Substance abuse problems, like intimate partner violence, has also come to impact people from all walks of life. Some researchers claim there is sufficient evidence to demonstrate a causal relationship between substance abuse and intimate partner violence. Researchers have found that approximately half of those with substance abuse problems have committed some form of intimate partner violence and half of those in batterer intervention programs have substance abuse problems. That rate is approximately five times higher than that of the general population, making those who abuse substances a high-risk population for intimate partner violence. This presentation will be a literature review that is the basis of a Masters Thesis research study

#ForTheCulture: Generation Z and the Future of Legal Education

Generation Z, with a birth year between 1995 and 2010, is the most diverse generational cohort in U.S. history and is the largest segment of our population. Gen Zers hold progressive views on social issues and expect diversity and minority representation where they live, work, and learn. American law schools, however, are not known for their diversity, or for being inclusive environments representative of the world around us. This culture of exclusion has led to an unequal legal profession and academy, where less than 10 percent of the population is non-white. As Gen Zers bring their demands for inclusion, and for a legal education that will prepare them to tackle social justice issues head on, they will encounter an entirely different culture—one that is completely at odds with their expectations. This paper adds depth and perspective to the existing literature on Generation Z in legal education by focusing on their social needs and expectations, recognizing them as critical drivers of legal education and reform. To provide Gen Z students with a legal education that will enable them to make a difference for others—a need deeply connected to their motivators and beliefs—law school culture must shift. Reimagining, reconstituting, and reconfiguring legal education to create a culture of inclusion and activism will be essential and necessary. Engaging in this work “for the culture” means getting serious about diversifying our profession by abandoning exclusionary hiring metrics, embedding social justice throughout the law school curriculum, and adopting institutional accountability measures to ensure that these goals are met. Gen Zers are accustomed to opposing institutions that are rooted in inequality; law schools can neither afford, nor ignore the opposition any longer. We must begin reimagining legal education now—and do it, for the culture

An analysis of inherent role conflicts in the governance of Michigan charter school boards contracting with full-service, for-profit private management companies

The analysis of inherent role conflicts in the governance of Michigan charter school boards contracting with full-service, for-profit private management companies provided quantitative and qualitative perspectives of experienced board members. These perspectives included their view of board governance and how responsibilities are divided and shared with for-profit private management companies. The triangulated analysis included three major sources of data: quantitative research, qualitative research, and a qualitative contractual analysis that provided the essence of the contracts between charter school boards of directors and their contracted for-profit private management companies. The theoretical framework that grounded this analysis was inclusive of three theories: agency theory, stewardship theory, and contract failure theory. These theories were collectively grounded in economic, psychological, and sociological foundations. The theories synergistically illustrated a framework of potentially inherent conflicts in the relationship between the agent and client. The charter school boards (client) relationships with the full-service for-profit private management companies (agent) encompassed the complexities of non-profit entities working side-by-side with private for-profit entities. This relationship creates anomalies that contribute to confusion, tensions, and factors that result in governance conflicts, which affect the operations of charter schools. The anomalies were a phenomenon of parallel governance, which is covertly impacting the governance of charter schools

These Brutal Indignities: The Case for Crimes Against Humanity in Black America

There is nothing we can do. Not guilty. No indictment. There is nothing we can do. As cases of violence and police killings of Black Americans continue to rise, there\u27s nothing we can do seems like the default response from the American justice system. Despite the evidence, police officers enjoy the protection of qualified immunity to insulate them from the consequences of their deadly actions. Prosecutors, who often work closely with police, decline to press criminal charges, or if charges are raised, they rarely lead to convictions. Instead of protecting its citizens from violence and loss of life, the American legal system serves as a barrier for Black people seeking accountability. The international legal system is not much better. If Black Americans seek remedy and relief from the United Nations, an international organization founded to maintain peace and protect human rights, they receive the same response. By failing to officially condemn the ongoing human rights violations occurring in the United States, the UN has indicated that there is nothing it can do either. Meanwhile, the atrocities, which I argue amount to Crimes Against Humanity against Black Americans, continue. This paper analyzes historic and modem instances of murder, persecution, and other inhumane acts, committed by the members of the U.S. government and individual actors against Black Americans. In it, I argue not just that these acts are Crimes Against Humanity, but that the known perpetrators of the attack against Black Americans are being insulated by American Exceptionalism, a barrier to justice and accountability, if ever there was one. We say again, now: We will submit no further to the brutal indignities being practiced against us; we will not be intimidated, and most certainly not eliminated... We Charge Genocide not only of the past but of the future. And we swear: it must not, it shall not, it will not happen to our people. Ossie Davi