279,601 research outputs found
Perspectives of Ultra Cold Atoms Trapped in Magnetic Micro Potentials
Recent work on magnetic micro traps for ultracold atoms is briefly reviewed.
The basic principles of operation are described together with the loading
methods and some of the realized trap geometries. Experiments are discussed
that study the interaction between atoms and the surface of micro traps as well
as the dynamics of ultracold gases in wave guides are discussed. The results
allow for an outlook towards future directions of research
Recommended from our members
All-Inorganic Metal Halide Perovskite Nanocrystals: Opportunities and Challenges.
The past decade has witnessed the growing interest in metal halide perovskites as driven by their promising applications in diverse fields. The low intrinsic stability of the early developed organic versions has however hampered their widespread applications. Very recently, all-inorganic perovskite nanocrystals have emerged as a new class of materials that hold great promise for the practical applications in solar cells, photodetectors, light-emitting diodes, and lasers, among others. In this Outlook, we first discuss the recent developments in the preparation, properties, and applications of all-inorganic metal halide perovskite nanocrystals, with a particular focus on CsPbX3, and then provide our view of current challenges and future directions in this emerging area. Our goal is to introduce the current status of this type of new materials to researchers from different areas and motivate them to explore all the potentials
An Examination of Social Adaptation Processes of Vietnamese Adolescents
The purpose of the study was to examine the factors that affect the ways in which Vietnamese youth feel about themselves and their place in society. More specifically, the purpose was to determine the relationship between sociocultural factors (L e. language proficiency, length of residence, socioeconomic class, ethnic identity, and cultural continuity) and such person-oriented variables as depression and alienation. Thrity-one college and fifteen high school students responded to a series of questions about themselves, family, relationships, personality, and achievement motivation. It was found that perceived problems with one\u27s ethnic group, cultural continuity, and parental attitudes toward schooling significantly predicted depression. Degree of attachment to one\u27s ethnic community, English speaking and writing abilities, and outlets for derpession tended to predict future outlook or feelings of hope versus alienation. Several variables were highly predictive of acculturation. Some of those variables are native language ability, English speaking and writing ability, outlets for depression, and perceived problems with one\u27s ethnic group. Implications of the findings for Vietnamese youth and future directions are discussed
Advancing the Role of Food Processing for Improved Integration in Sustainable Food Chains
Food scientists need to work together with agriculturists, nutritionists, civil society, and governments to develop an integrative approach to feed a growing population sustainably. Current attention on food sustainability mainly concentrates on production agriculture and on nutrition, health, and well-being. Food processing, the necessary conversion of raw materials to edible, functional, and culturally acceptable food products, is an important link between production and consumption within the food value chain. Without increased attention to the role of food processing for a maintainable food supply, we are unlikely to succeed in addressing the mounting challenges in delivering sustainable diets for all people. The objective is to draw on multidisciplinary insights to demonstrate why food processing is integral to a future food supply. We aim to exemplify the importance of essential relevant sustainability indicators and impact assessment for developing informed strategies to feed the world within planetary boundaries. We provide a brief outlook on sustainable food sources, review food processing, and recommend future directions. We highlight the challenges and suggest strategies for improving the sustainability of food systems, to hopefully provide a catalyst for considering implementable initiatives for improving food and nutrition security
Strategies for Universal Prevention of Depression in Adolescents
Background: The occurrence of depressive disorders in adolescence is of high individual and social
importance because of their prevalence and persistence into adulthood and their co-morbidity with other
psychological disorders and psychosocial problems. International researchers have recognized the
seriousness of depressive disorders in adolescence and thus have been involved in the development and
evaluation of prevention programs.
Methods: This article will present the difficulties encountered in prevention research with adolescents and
in the determination of prevention program efficacy. The main focus will be an overview of current
prevention programs and their efficacy with special attention paid to programs featured in the German
language literature. Finally, this article will highlight future directions for prevention research.
Conclusions: In spite of some critical points, there appears to be a positive outlook for depression
prevention programs for adolescents. There is currently support for universal depression prevention
programs that may be incorporated into school settings and on which future research may build. It is
expected that the methodological problems highlighted in this article may be corrected in the next few
years, which may result in more effective, easily integrated programs and a more thorough understanding
of adolescent depression
Nonequilibrium phenomena in high Landau levels
Developments in the physics of 2D electron systems during the last decade
have revealed a new class of nonequilibrium phenomena in the presence of a
moderately strong magnetic field. The hallmark of these phenomena is
magnetoresistance oscillations generated by the external forces that drive the
electron system out of equilibrium. The rich set of dramatic phenomena of this
kind, discovered in high mobility semiconductor nanostructures, includes, in
particular, microwave radiation-induced resistance oscillations and
zero-resistance states, as well as Hall field-induced resistance oscillations
and associated zero-differential resistance states. We review the experimental
manifestations of these phenomena and the unified theoretical framework for
describing them in terms of a quantum kinetic equation. The survey contains
also a thorough discussion of the magnetotransport properties of 2D electrons
in the linear response regime, as well as an outlook on future directions,
including related nonequilibrium phenomena in other 2D electron systems.Comment: 60 pages, 41 figure
- …