Feasibility investigation of a low-temperature, variable infrared source. Horizon definition study

Feasibility of low temperature, variable infrared source - calibration of instrumentation used in defining earth horizo

Cosmological horizon entropy and generalised second law for flat Friedmann Universe

We discuss the generalized second law (GSL) and the constraints imposed by it for two types of Friedmann universes. The first one is the Friedmann universe with radiation and a positive cosmological constant, and the second one consists of non-relativistic matter and a positive cosmological constant. The time evolution of the event horizon entropy and the entropy of the contents within the horizon are analyses in an analytical way by obtaining the Hubble parameter. It is shown that the GSL constraint the temperature of both the radiation and matter of the Friedmann universe. It is also shown that, even though the net entropy of the radiation (or matter) is decreasing at sufficiently large times as the universe expand, it exhibit an increase during the early times when universe is decelerating. That is the entropy of the radiation within the comoving volume is decreasing only when the universe has got an event horizon.Comment: 15 pages, 9 figure

Multi-camera Realtime 3D Tracking of Multiple Flying Animals

Automated tracking of animal movement allows analyses that would not otherwise be possible by providing great quantities of data. The additional capability of tracking in realtime - with minimal latency - opens up the experimental possibility of manipulating sensory feedback, thus allowing detailed explorations of the neural basis for control of behavior. Here we describe a new system capable of tracking the position and body orientation of animals such as flies and birds. The system operates with less than 40 msec latency and can track multiple animals simultaneously. To achieve these results, a multi target tracking algorithm was developed based on the Extended Kalman Filter and the Nearest Neighbor Standard Filter data association algorithm. In one implementation, an eleven camera system is capable of tracking three flies simultaneously at 60 frames per second using a gigabit network of nine standard Intel Pentium 4 and Core 2 Duo computers. This manuscript presents the rationale and details of the algorithms employed and shows three implementations of the system. An experiment was performed using the tracking system to measure the effect of visual contrast on the flight speed of Drosophila melanogaster. At low contrasts, speed is more variable and faster on average than at high contrasts. Thus, the system is already a useful tool to study the neurobiology and behavior of freely flying animals. If combined with other techniques, such as `virtual reality'-type computer graphics or genetic manipulation, the tracking system would offer a powerful new way to investigate the biology of flying animals.Comment: pdfTeX using libpoppler 3.141592-1.40.3-2.2 (Web2C 7.5.6), 18 pages with 9 figure

A Fresh Start: Surveillance Tech and The Modern Law Firm

The legal community is rapidly evolving: firms are more beholden to clients than ever, associates are growing more competitive with one another, and younger firm employees are more willing than ever to subject themselves to surveillance from their employers. These evolutions come alongside a boom in surveillance technology. Tech companies now provide services that can track every keystroke a lawyer makes on a company computer, analyze the content of their computer screens, or even develop algorithms to measure employee productivity. How does the modern law firm respond to these new technologies? How do they weigh their obligations to clients with the privacy considerations of their employees? This Note examines these key questions and makes a comment about the honor of the legal profession along the way

The Richmond Bread Riot of 1863: Class, Race, and Gender in the Urban Confederacy

Confederate war clerk, J.B. Jones\u27s description of the Richmond Bread Riot of 1863, clearly highlights the suffering which permeated the urban centers of the Confederacy by the midpoint of the Civil War. The production and transportation of goods became increasingly difficult in the war torn nation. Inflation undermined the value of Confederate currency and made it difficult for those on fixed wages to provide for themselves and their families. The influx of thousands of refugees into Richmond created a deficit of housing in the city and raised the already inflated prices of goods. By 1863, most citizens remarked that they found it almost impossible to feed themselves. As Emory M. Thomas has observed, “a nation of farmers could indeed go hungry.” Although the Confederates ended 1862 militarily on a high note with the victory at Fredericksburg in December, the staggering casualties at Antietam and the ensuing Emancipation Proclamation combined to create undercurrents of doubt in the fledgling nation. The military\u27s performance, however vital to the Confederacy\u27s hope for survival, did not affect the lives of the citizens on the home front to the extent that the government\u27s domestic policies did. In fact, much of the Confederacy\u27s legislation, passed in the opening months of 1863, only accentuated whatever feelings of resentment existed at the end of the previous year. In pursuit of success on the battlefield, the Confederacy abandoned many of the principles on which the nation had been founded. The Richmond Bread Riot demonstrated that Confederate domestic legislation and treasury policies combined to create a level of discontent on the home front which spurred people to step outside traditional notions regarding gender roles and social norms

Dialoging A Successful Pedagogy for Embedded Tutors

Over the past three years, Rider University’s Student Success Center Writing Lab has implemented an embedded tutor program for composition courses. Tutors attend class, participate in class discussions, facilitate writing workshops in class, and hold drop-in hours for students (in addition to tutors’ Writing Lab hours). The Embedded Tutor (ET) program, facilitated by Jenny Scudder (who is also the Writing Lab Director), has been successful in helping students complete skills-based courses and connect to academic support services. Initial assessment of the ET program supports the inclusion of the tutor in a skills-based course. While an ET’s training is similar to a tutor who works solely in the Writing Lab, there are key additions that are vital to the tutors’—and the program’s—succesUniversity Writing Cente

Some Tests for Checking the Efficiency of a High School Curriculum

A thesis submitted to the department of Education and the faculty of the Graduate School of the University of Kansas in partial fulfillment for the degree of Master of Arts

The crystal and molecular structure of Hydridotetrakis(diethyl phenylphosphonite)cobalt(I)

An X-ray structure determination of the title compound shows that the co-ordination about the cobalt atom is approximately trigonal bipyramidal; n.m.r. data indicate that the complex is non-rigid in solution