How Much do Heavy Quarks Thermalize in a Heavy Ion Collision?

We investigate the thermalization of charm quarks in high energy heavy ion collisions. To this end, we calculate the diffusion coefficient in the perturbative Quark Gluon Plasma and relate it to collisional energy loss and momentum broadening. We then use these transport properties to formulate a Langevin model for the evolution of the heavy quark spectrum in the hot medium. The model is strictly valid in the non-relativistic limit and for all velocities \gamma v < \alphas^{-1/2} to leading logarithm in $T/m_D$. The corresponding Fokker-Planck equation can be solved analytically for a Bjorken expansion and the solution gives a simple estimate for the medium modifications of the heavy quark spectrum as a function of the diffusion coefficient. Finally we solve the Langevin equations numerically in a hydrodynamic simulation of the heavy ion reaction. The results of this simulation are the medium modifications of the charm spectrum $R_{AA}$ and the expected elliptic flow $v_2(p_T)$ as a function of the diffusion coefficient.Comment: 34 pages, 9 figures. Inculdes a detailed comparison with Boltzmann simulation

The Law School\u27s Role in Post-J.D. Specialty Education

As members of a profession which is largely self-policing, attorneys must find ways to protect the public by identifying the areas of practice that require special expertise and by ensuring that those who hold themselves out as specialists possess the necessary expertise. Simply because one claims a specialty or even practices a specialty does not mean that he has the requisite competence to practice in the field. Because one is presently competent in a specialty does not mean that he will continue to practice and maintain his competence and keep abreast of new techniques and developments. Certainly the profession should not be satisfied with the threat of malpractice claims as the only means to regulate this aspect of a lawyer\u27s practice. The profession must establish certification requirements for specialty practice, and the law schools must be willing to accept primary responsibility for educating those attorneys who wish to satisfy these requirements and engage in such a practice

Alien Registration- Campbell, Guy O. (Hebron, Oxford County)

https://digitalmaine.com/alien_docs/21075/thumbnail.jp

A Comparative Study of the Scholastic Ability of South Dakota High School Seniors in Their Self-selected Occupational Groups as Evidenced by the State-wide ACE Test Results in 1952

The major study was to discover the general character of fourteen selected groups from the high-school seniors of South Dakota who took the ACE tests and filled in the personal data in the Fall of 1952. Eleven of these groups were occupations; one group was those who indicated college academic majors; one group was made up of those boys and girls who put in some form of military service as their tentative occupational choice, and the final one was composed of those boys and girls who gave no vocational choice. The median was used as the measure of central tendency and semi-interquartile range as a measure of variability. The first minor study was a breakdown of the teaching group into two groups of boys and one or girls. The one group or men indicating coaching and the other, teaching as their profession. This information also made it possible to compare the total group or men with the group of women teaching. The second minor study was made to compare those with professional or vocational choices with the group indicating no vocational choice made. This sub study included comparisons of the two sub groups of the no vocational choice category. One part was made up of those who indicated they were going to college. The other part failed to indicate any post-high-school training intended