Penn Arts & Sciences

The University of Pennsylvania School of Arts and Sciences forms the foundation of the scholarly excellence that has established Penn as one of the world's leading research universities. We teach students across all 12 Penn schools, and our academic departments span the reach from anthropology and biology to sociology and South Asian studies.

Members of the Penn Arts & Sciences faculty are leaders in creating new knowledge in their disciplines and are engaged in nearly every area of interdisciplinary innovation. They are regularly recognized with academia's highest honors, including membership in prestigious societies like the National Academy of Sciences, the American Association for the Advancement of Science, the American Academy of Arts and Sciences, and the American Philosophical Society, as well as significant prizes such as MacArthur and Guggenheim Fellowships.

The educational experience offered by Penn Arts & Sciences is likewise recognized for its excellence. The School's three educational divisions fulfill different missions, united by a broader commitment to providing our students with an unrivaled education in the liberal arts. The College of Arts and Sciences is the academic home of the majority of Penn undergraduates and provides 60 percent of the courses taken by students in Penn's undergraduate professional schools. The Graduate Division offers doctoral training to over 1,300 candidates in more than 30 graduate programs. And the College of Liberal and Professional Studies provides a range of educational opportunities for lifelong learners and working professionals.

 

 

Filters

1960 - 1969371970 - 1979232
269
Reset filters

Settings

Start date: 1960 × End date: 1979 ×

Search results

Now showing 1 - 10 of 269
  • Publication
    Strategies of Evaluating Police Performance
    (1972) Furstenberg, Frank F
    Police in this country have never been immune from public criticism. But during the past decade negative reaction has increased markedly, both in intensity and in frequency of expression. Chronic grievances—corruption, strained relations with minority groups, ineffectualness in combating crime—have resurfaced (some would say they were never submerged), and new concerns over the growth of unions and politicization of police forces have arisen. While the police still enjoy a great deal of popular support, there are indications that, at least in certain segments of the population, a reevaluation of their image may be taking place.
  • Publication
  • Publication
    News and Notes
    (1973)
  • Publication
    Volume 1, Issue 1
    (1973)
  • Publication
  • Publication
    Spin-Wave Spectra of Yttrium and Gadolinium Iron Garnet
    (1963-12-15) Harris, A. Brooks
    The problem of deducing the values of the exchange integrals in yttrium and gadolinium iron garnet from measurements of the magnetization and the magnetic contribution to the specific heat at low temperatures is considered. For these garnets the spin-wave normal modes can be found by solving the semiclassical equations of motion which give rise to a set of n simultaneous linear equations, where n is the number of magnetically inequivalent ions in the unit cell. Expressions for the thermodynamic functions at low temperatures in terms of the frequencies of the normal modes are given assuming the validity of the spin-wave approximation. It is argued that the temperature variation of the frequency of these normal modes on the macroscopic properties can be completely accounted for without considering the zero point energy explicitly. Due to the size of the unit cell, the equations for the frequencies of the normal modes can only be solved numerically for general values of k. Such solutions are obtained for k lying along a [111] direction for various values of the exchange integrals, and the thermodynamic functions corresponding to these choices of parameters are calculated. In the case of yttrium iron garnet, the value of D, the coefficient of a2k2 in the acoustic dispersion law, is reliably known and fixes one linear combination of Jaa, Jad, and Jdd. By comparing our calculations with the magnetization data of Solt, it was established that Jaa/Jad=0.2, but since the magnetization was not very sensitive to variations of the ratio Jdd/Jad its value could not be estimated precisely. Taking Jdd/Jad=0.2 gives Jaa=Jdd=6.35 cm−1 and Jad=31.8 cm−1. For GdIG the specific heat data below 20°K is not very much influenced by the exact values of the iron-iron exchange integrals which were taken to be those quoted above for yttrium iron garnet. Again one combination of Jac and Jdc is known from the calorimetric determination of the single ion splitting. By comparing the specific heat data below 5°K with calculations for various values of Jac/Jdc it was possible to determine Jac and Jdc separately: Jdc=7.00 cm−1 and Jac=1.75 cm−1. These values are about 25% larger than what one would expect using the Weiss molecular field approximation.
  • Publication
  • Publication
    On the Anatomy of Ambidextrous Anthropologists
    (1978) Dexter, Ralph W
  • Publication
    Musical Instruments from Benin
    (1971) Ben-Amos, Dan
  • Publication