561 research outputs found
Generalized coherent states for solvable quantum systems with degenerate discrete spectra and their nonclassical properties
In this paper, the generalized coherent state for quantum systems with
degenerate spectra is introduced. Then, the nonclassicality features and
number-phase entropic uncertainty relation of two particular degenerate quantum
systems are studied. Finally, using the Gazeau-Klauder coherent states
approach, time evolution of some of the nonclassical properties of the coherent
states corresponding to the considered physical systems are discussed.Comment: 17 pages, 10 figures,Physica A: Statistical Mechanics and its
Applications, Article in Pres
Impact of acceptance and commitment-based psychoeducation on the adjustment of expressed emotion in families of patients with bipolar disorder
Background: Expressed emotion is one of the key factors resulting in relapse of psychiatric disorders. Expressed emotion is a critical, hostile and emotionally over-involved attitude that relatives have toward a family member with such disorder. Since stress from the expressed emotion leads to relapse in person with a disorder, the present study aimed to investigate the effect of mental training based on the acceptance and commitment on the regulation of expressed emotion in families of patients with bipolar disorder. Materials and Methods: This quasi-experimental study was carried out on families of patients with bipolar disorder referring to Kargarnejad hospital (Kashan, Iran). The purposive sampling method was used to select the participants. As an intervention acceptance and commitment-based psychoeducation of the families was held in 10 sessions. Expressed emotion questionnaire was completed by relatives pre- and post-intervention. Results: The results showed that the level of expressed emotion reduced after the intervention in families of patients with bipolar disorder (P<0.001). A significant reduction was observed in the level of expressed emotion in all four subscales (negative attitudes, tolerance/expectations, harassment and intervention and emotional response) (P<0.001). Conclusion: Family psychoeducation based on the acceptance and commitment can be effective in the regulation of expressed emotion in families of patients suffering from bipolar disorder
Magnetoexcitons in quantum-ring structures: a novel magnetic interference effect
A novel magnetic interference effect is proposed for a neutral, but
polarizable exciton in a quantum ring with a finite width. The magnetic
interference effect originates from the nonzero dipole moment in the exciton.
The ground state of exciton acquires a nonzero angular momentum with increasing
normal magnetic field. This leads to the suppression of the photoluminescence
in defined windows of the magnetic field.Comment: 6 pages, 2 figures, Proceed. EP2DS, 2001 (Physica E
Age and growth of the Mesopotamian barb, Capoeta damascina, in central Iran
Age and growth of Mesopotamian barb, Capoeta damascina, were studied in the Zayandehrud River, in central Iran, from March 2007 to April 2008. Among the 689 specimens studied, age groups in males ranged from 1+ to 9+ and that in females ranged from 1+ to 10+. The sex ratio (1 M: 1.6 F) was not significantly different from 1:1 ratio. Maximum fork length and weight was 39 cm and 1.115 g for males and 54.2 cm and 2.340 g for females. In all age classes, females were larger than males. The most frequent age groups were 3+ in males and 4+ in females. The highest value for condition factor was observed in June. The growth of C. damascina was described by von Bertalanffy growth curve as k=0.01, L_∞=56.2 cm, t_0=-0.63 for males and k = 0.05, L_∞=117.1 cm and t_0= -0.43 years for females. The length-weigh relationship was described as W=0.0169L^2.95 (r^2 =0.98) for males and as W=0.0155L2.99 (r^2 =0.99) for females, indicating an isometric growth pattern in both sexes. Growth performance index φ` was estimated as 5.73 for males and 6.53 for females, indicating a faster growth rate in females
System Reliability Evaluation Using Concurrent Multi-Level Simulation of Structural Faults
This paper provides a methodology that leverages state-of-the-art techniques for efficient fault simulation of structural faults together with transaction level modeling. This way it is possible to accurately evaluate the impact of the faults on the entire hardware/software syste
Efficient Simulation of Structural Faults for the Reliability Evaluation at System-Level
In recent technology nodes, reliability is considered a part of the standard design ¿ow at all levels of embedded system design. While techniques that use only low-level models at gate- and register transfer-level offer high accuracy, they are too inefficient to consider the overall application of the embedded system. Multi-level models with high abstraction are essential to efficiently evaluate the impact of physical defects on the system. This paper provides a methodology that leverages state-of-the-art techniques for efficient fault simulation of structural faults together with transaction-level modeling. This way it is possible to accurately evaluate the impact of the faults on the entire hardware/software system. A case study of a system consisting of hardware and software for image compression and data encryption is presented and the method is compared to a standard gate/RT mixed-level approac
The effect of radiotherapy and chemotherapy on osmotic fragility of red blood cells and plasma levels of malondialdehyde in patients with breast cancer
Background: Gamma radiation effects on the erythrocyte membrane from three different functional parts, lipid bilayer, cytoskeleton and protein components. When the red cell membrane is exposed to radiation, it loses its integrity and hemoglobin leaks out. In addition, irradiation leads to lipid peroxidation and the products of this process, leading to hemolysis. The aim of the present study was to measure osmotic fragility (OF) of red blood cells and malondialdehyde (MDA) levels as a marker of oxidative injury in breast cancer patients treated with radiation and chemotherapy. Materials and Methods: The OF test was performed using different concentrations of a salt solution. The measurement of MDA was done with chemical methods.11 The sampling was taken during three stages of treatment: first sample was taken before starting chemotherapy, the second sample was taken before radiation therapy and the third sample was taken after radiotherapy. Results: No statistically significant differences between levels of MDA in these three stages of treatment were observed. However, the comparison of mean levels of MDA showed an increase after radiotherapy. The OF rate did not show significant difference (P > 0.05) during the stages of treatment. Conclusion: In a standard treatment program of radiotherapy and chemotherapy lipid peroxidation level and OF do not significantly increase. © 2014 Greater Poland Cancer Centre
Counting flags in triangle-free digraphs
Motivated by the Caccetta-Haggkvist Conjecture, we prove that every digraph
on n vertices with minimum outdegree 0.3465n contains an oriented triangle.
This improves the bound of 0.3532n of Hamburger, Haxell and Kostochka. The main
new tool we use in our proof is the theory of flag algebras developed recently
by Razborov.Comment: 19 pages, 7 figures; this is the final version to appear in
Combinatoric
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