On Stability For Nonstationary M/M/N/N + R Queue

We consider nonstationary M/M/N/N + R queueing model and obtain the first bounds of stability

Lasing of donor-bound excitons in ZnSe microdisks

Excitons bound to flourine atoms in ZnSe have the potential for several quantum optical applications. Examples include optically accessible quantum memories for quantum information processing and lasing without inversion. These applications require the bound-exciton transitions to be coupled to cavities with high cooperativity factors, which results in the experimental observation of low-threshold lasing. We report such lasing from fluorine-doped ZnSe quantum wells in 3 and 6 micron microdisk cavities. Photoluminescence and selective photoluminescence spectroscopy confirm that the lasing is due to bound-exciton transitions.Comment: 4 pages, 3 figures; introduction rewritte

SOCIAL CONSCIOUSNESS AS A SUBJECT OF PHILOSOPHY AND THE HUMANITIES

Social consciousness studies are essential to humanities provided by the university program. This is of particular importance as a part of the philosophical course since only philosophy regards social consciousness as a whole system. Forms and levels of social consciousness are in the foreground. Each form is stressed to be manifested at all levels although to different degrees. The status of science remains controversial. Scientific consciousness and ordinary consciousness must be distinguished. It is rather difficult for students and post-graduates to understand what social psychology means and what kind of role it plays in public life. Ideology takes a special place in social consciousness structure. We should pay particular attention to it. Correlation between social, group and individual consciousness is a serious problem. Learning of this theme is of educative and practical importance. It favors the skills of joint activity in students' group encouraging to overcome fragmentariness typical of some young people consciousness and to form consistent thinking in its turn. We should dwell on the question of values both on theoretical and practical levels. The concept of a possible conflict of values is of great practical importance. On the one hand modern person is engaged in global processes and shares "all-human" values, on the other - being grown up in some ethno-cultural environment he shares the values of the ethnic group. Trying to solve the intrapersonal conflict, students form creative attitude to education and upbringing. Comprehension of what values are and why they clash with each other will help students to become subjects of intercultural interaction. The question of what humanism is and how to put it into practice will be raised over again