Resistive communications based on neuristors

Memristors are passive elements that allow us to store information using a single element per bit. However, this is not the only utility of the memristor. Considering the physical chemical structure of the element used, the memristor can function at the same time as memory and as a communication unit. This paper presents a new approach to the use of the memristor and develops the concept of resistive communication

On Finite Rank Deformations of Wigner Matrices

We study the distribution of the outliers in the spectrum of finite rank deformations of Wigner random matrice under the assumption that the off-diagonal matrix entries have uniformly bounded fifth moment and the diagonal entries have uniformly bounded third moment. Using our recent results on the fluctuation of resolvent entries [31],[28], and ideas from [9], we extend results by M.Capitaine, C.Donati-Martin, and D.F\'eral [12], [13].Comment: accepted for publication in Annales de l'Institut Henri Poincar\'e (B) Probabilit\'es et Statistique

Memories of the Great War: An Analysis of Jackson Purchase Veterans’ Oral Histories of WWI

The First World War affected the lives of millions, creating collective memories of hardships, uncertainty, political tension, and animosity toward foreign enemies. In the United States, World War I was a turning point in the nation’s growth and development, but on a smaller scale it was a critical historical moment in the individual lives of the veterans who served. This research project will showcase the experiences of the Jackson Purchase’s WWI veterans with an emphasis on their perceptions during the war, their reasons for enlisting, the countless once-in-a-lifetime experiences they had along the way, the hardships they faced, and the remarkable clarity of their memory years after the fact. Regardless of their race, religious beliefs, or hometowns, the Purchase’s WWI veterans were linked through their strong sense of duty, love for their families, and attachment to their homes. The project is primarily based on the oral history collections of Murray State’s Pogue Special Collections Library, notably the Jackson Purchase Oral History Project’s interviews, conducted in the late 1970s and 1980s, of octogenarian WWI veterans. Their memories of the war and accounts of life in the Purchase Area in the early 20th century are strikingly clear and well-delivered considering the interviewees’ advanced age. The remarkable uniqueness of Pogue Library’s WWI oral history collection served as the inspiration for this project

To devour the land of Mkwawa: colonial violence and the German-Hehe War in East Africa, c.1884-1914

To Devour the Land of Mkwawa: Colonial Violence and the German-Hehe War in East Africa focuses on the German-Hehe War, which raged across the Southern Highlands of what is now Tanzania in the 1890s, and is based on archival and field research done in Berlin, Freiburg, Dar es Salaam, and Iringa. The central question of the dissertation is nature of imperial violence in the African context, in this case perpetrated by German-led colonial forces in their attempt to subdue the large, martially proficient Hehe conquest state, which was similar other states based on the Zulu model. The extreme brutality and destruction that characterized this nearly decade-long campaign resulted not simply from some sort of “special path” of the German Empire or some sort of culturally encoded national pathology, but rather arose from the interplay of conditions and exigencies “on the spot” in East Africa and broader, overlapping circuits of violence that connected processes and events across the globe. I also seek to destabilize the traditional binary of omnipotent European invaders and passive African victims—indeed, the Hehe under Chief Mkwawa were highly effective killers and administrators whose tenacious resistance to the Germans itself brought forth extreme responses from German colonial forces. My work is transnational and comparative: it is the former insofar as the violence that characterized the Hehe-German War was the result of and drew on several concurrent developments that transcended national or other established political boundaries. It is the latter in that I explicitly compare the Hehe-German War with other cases of intense colonial violence across Africa and Asia in order to illuminate what is specific about both the German imperial experience and about the powerful Hehe Mfecane State. These events are a part of world history, not just East African or German history, and they offer one an opportunity to explore the larger issue of how violence and warfare—particularly irregular, asymmetrical warfare—shaped and continue to shape our world

Characterization of a Method for Inverse Heat Conduction Using Real and Simulated Thermocouple Data

It is often impractical to instrument the external surface of high-speed vehicles due to the aerothermodynamic heating. Temperatures can instead be measured internal to the structure using embedded thermocouples, and direct and inverse methods can then be used to estimate temperature and heat flux on the external surface. Two thermocouples embedded at different depths are required to solve direct and inverse problems, and filtering schemes are used to reduce noise in the measured data. Accuracy in the estimated surface temperature and heat flux is dependent on several factors. Factors include the thermocouple location through the thickness of a material, the sensitivity of the surface solution to the error in the specified location of the embedded thermocouples, and the sensitivity to the error in thermocouple data. The effect of these factors on solution accuracy is studied using the methodology discussed in the work of Pizzo, et. al.1 A numerical study is performed to determine if there is an optimal depth at which to embed one thermocouple through the thickness of a material assuming that a second thermocouple is installed on the back face. Solution accuracy will be discussed for a range of embedded thermocouple depths. Moreover, the sensitivity of the surface solution to (a) the error in the specified location of the embedded thermocouple and to (b) the error in the thermocouple data are quantified using numerical simulation, and the results are discussed

Single Port Donor Nephrectomy

In 2007, Rane presented the first single port nephrectomy for a small non-functioning kidney at the World Congress of Endourology. Since that time, the use of single port surgery for nephrectomy has expanded to include donor nephrectomy. Over the next two years the technique was adopted for many others types of nephrectomies to include donor nephrectomy. We present our technique for single port donor nephrectomy using the Gelpoint device. We have successfully performed this surgery in over 100 patients and add this experience to our experience of over 1000 laparoscopic nephrectomies. With the proper equipment and technique, single port donor nephrectomy can be performed safely and effectively in the majority of live donors. We have found that our operative times and most importantly our transplant outcomes have not changed significantly with the adoption of the single port donor nephrectomy. We believe that single port donor nephrectomy represents a step forward in the care of living donors

Progress with the LOFAR Imaging Pipeline

One of the science drivers of the new Low Frequency Array (LOFAR) is large-area surveys of the low-frequency radio sky. Realizing this goal requires automated processing of the interferometric data, such that fully calibrated images are produced by the system during survey operations. The LOFAR Imaging Pipeline is the tool intended for this purpose, and is now undergoing significant commissioning work. The pipeline is now functional as an automated processing chain. Here we present several recent LOFAR images that have been produced during the still ongoing commissioning period. These early LOFAR images are representative of some of the science goals of the commissioning team members.Comment: 11 pages, 6 figures. Accepted for publication in proceedings of "ISKAF2010 Science Meeting", PoS(ISKAF2010)05

Fluctuations of Matrix Entries of Regular Functions of Wigner Matrices

We study the fluctuations of the matrix entries of regular functions of Wigner random matrices in the limit when the matrix size goes to infinity. In the case of the Gaussian ensembles (GOE and GUE) this problem was considered by A.Lytova and L.Pastur in J. Stat. Phys., v.134, 147-159 (2009). Our results are valid provided the off-diagonal matrix entries have finite fourth moment, the diagonal matrix entries have finite second moment, and the test functions have four continuous derivatives in a neighborhood of the support of the Wigner semicircle law.Comment: minor corrections; the manuscript will appear in the Journal of Statistical Physic