نتایج جستجو برای: three basic points

تعداد نتایج: 1725606  

2008
Satoshi Nishimoto Mitsuhiro Arikawa

We study three-leg antiferromagnetic Heisenberg model with the periodic boundary conditions in the rung direction. Since the rungs form regular triangles, spin frustration is induced. We use the density-matrix renormalization group method to investigate the ground state. We find that the spin excitations are always gapped to remove the spin frustration as long as the rung coupling is nonzero. W...

Journal: :Journal of Differential Equations 1996

Journal: :Linear Algebra and its Applications 1985

Journal: :Mathematics of Computation 1993

Journal: :Canadian University Music Review 1982

Journal: :J. Scheduling 2014
Eun-Seok Kim Celia A. Glass

Periodic scheduling has many attractions for wireless telecommunications. It offers energy saving where equipment can be turned off between transmissions, and high-quality reception through the elimination of jitter, caused by irregularity of reception. However, perfect periodic schedules, in which each (of n) client is serviced at regular, prespecified intervals, are notoriously difficult to c...

رضوانفر, محمدرضا, رفیعی, محمد, طلایی, افسانه, یادگاری, نسرین,

Background and Aim: Vitamin D has a basic role in bone development and metabolism. Regarding high prevalence of vitamin D deficiency in Iran, we aimed to investigate its point prevalence in Arak, Iran and determine a cut-off point for vitamin D deficiency in the region. Materials and Methods: In a cross-sectional study,420 adolescents (220 girls, 200 boys) aged 10-16 years old were selected usi...

Introduction: This study embarked on the evaluation of the quality of curriculum of general medicine in Baqiyatallah University based on Iranian national and WFME global standards. Method: A survey study was designed using a valid and reliable questionnaire based on Basic Standards for undergraduate general medicine curriculum in Iran as well as WFME standards. Data were collected from faculty...

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