Experiments on quantum wells in tilted fields have stimulated several groups to investigate semiclassical theories for the current fluctuations. As a result, there is now a sort of “Zoo” of different types of trajectories (Periodic Orbits, Normal Orbits, Central Closed Orbits, Ghost Periodic Orbits, Saddle Orbits, Minimal Orbits) which have all been used to analyse these experimental spectra. Here we review briefly the semiclassical descriptions for this system and discuss which types of trajectories are most appropriate in those regimes where (...) one cannot use Periodic Orbits. We conclude that using either Saddle Orbits (SOs) or Minimal Orbits (MOs) yields excellent agreement with experiment and quantal calculations. We also investigate the damping of the amplitudes of POs (or other semiclassical trajectories). In these scaling systems, different experiments on wells of variable dimensions can correspond to the same classical dynamics and even the same effective ℏ. The trajectory associated with the experimental current oscillation is unchanged: the only significant alteration is a re-scaling of the period T of the PO, affecting only the amplitude damping factors τe−T/τ due to incoherent processes in the experiment. By comparing measurements of the same period-doubling feature of the current in 85 nm and 120 nm wells we can probe the value of τ from the change in the PO (or SO/MO) amplitudes which are estimated from the experiment. (shrink)

Memoirs and papers presented at a conference held on the occasion of the 90th birthday of the Mongolian philosopher Ts. Balkhaajav.

This study investigated the importance of socioeconomic factors such as education, income, religion, family structure and residence in explaining the increased risk of mortality among vulnerable populations aged less than 20 years in Rio de Janeiro, Brazil. Data used were from the 1991 Brazilian Demographic Census and comprised 121,060 women aged 15–49 residing in Rio de Janeiro. Two alternative statistical methods were used to calculate the risk of death: the widely used Brass method (an indirect estimate which assesses population risks) (...) and a case-control study (which assesses individual risks). The study also focused on the importance of indicators of human and social capital, the lack of which may explain the higher risk of death among children and adolescents. Lack of education was found to be a major determinant of mortality at young ages. Residence in a favela (shantytown), families in which mothers were the head of the family, and a lower median level of income were found to be significant determinants of mortality among vulnerable populations in Brazil. However, religion was not found to be as important a predictor of high mortality. (shrink)

"This book is a Festschrift volume in honour of Prof. Trichur S. Rukmani that reflects the plethora of issues which she studied in her scholastic life. It includes twenty-four essays by distinguished scholars on various classical and contemporary issues pertaining to Indian studies. While the volume discusses current research in the field of Yoga -- Prof. Rukmani's primary research field -- it also invites further reflection on other areas of Indian thought which have attracted her attention in the course of (...) her long and fruitful academic career. The volume is divided thematically into six sections. The first two sections deal with the interpretation of the Yoga, Vedanta and Gaudiya-Vaishnava traditions, exploring issues of hermeneutics, methodology and philosophical analysis. The third section addresses issues of continuity within the Indian tradition and includes essays on tantric Shaivism, Mimamsa and the Bhagavad-Gita. The next two sections feature essays on the Sanskrit philosophical discourse, grammar, epic literature and renunciation in the Indian tradition. The last section of the volume takes up issues of contemporary relevance such as the insights from the Hindu tradition towards environmental ethics, the Svadhyaya movement and its dharmic ecology, non-violence, gender, cultural identity as well as syncretism."--Publisher description. (shrink)

В монографии рассматриваются возможности применения обобщенной релевантной логики к проблеме моделирования рассуждений. Для научных работников, аспирантов, студентов, специалистов в философской логике, аргументации и компьютерной науке.

Set in 2029, The Education of Sam Sanders tells the story of an 8th grader searching for meaning in his school experiences. In a public school system beset by the finality and rigidity of standardized tests and curriculums, Sam Sanders, with the help of his teacher and mother, defies the system and creates something new: a curriculum that enlightens rather than categorizes students. In this hopeful yet frightening look at an educational future not too far from our own, we encounter (...) the high cost of inquiry-oriented learning and the even higher cost of a system that suppresses it. (shrink)

Introduction At some point in your life you will have told a lie and have been believed. You will have deceived the person to whom you lied. ...

Mongolian philosophy in the post-communism period.

t. 1. Klassicheskai︠a︡ algebra.--t. 2. Matematicheskai︠a︡ logika i obshchai︠a︡ teorii︠a︡ algebraicheskikh sistem.