Concurrence for multipartite states

We construct a generalized concurrence for general multipartite states based on local W-class and GHZ-class operators. We explicitly construct the corresponding concurrence for three-partite states. The construction of the concurrence is interesting since it is based on local operators.Comment: 5 page

General pure multipartite entangled states and the Segre variety

In this paper, we construct a measure of entanglement by generalizing the quadric polynomial of the Segre variety for general multipartite states. We give explicit expressions for general pure three-partite and four-partite states. Moreover, we will discuss and compare this measure of entanglement with the generalized concurrence.Comment: 5 page

Perihelion advance and trajectory of charged test particles in Reissner-Nordstrom field via the higher-order geodesic deviations

By using the higher-order geodesic deviation equations for charged particles, we apply the method described by Kerner et.al. to calculate the perihelion advance and trajectory of charged test particles in the Riessner-Nordstrom spacetime. The effect of charge on the perihelion advance is studied and compared the results with those obtained earlier via the perturbation method. The advantage of this approximation method is to provide a way to calculate the perihelion advance and orbit of planets in the vicinity of massive and compact objects without considering Newtonian and post-Newtonian approximation.Comment: 12 pages, 1 figur

Nursing students’ viewpoints about problems of clinical education

Background:Clinical training is fundamental part of nursing education program and causes the student to apply the theoretical knowledge in caring for patients. The nature and duties of nursing in community is such a special issue that doubles the sensitivity of coordination between theoretical courses and clinical services. About half of nursing and midwifery training time is spent on clinical training but there are many factors that affect the process of clinical education. Therefore the aim of this study is assessing the problems of clinical training in nursing students in clinical environments in Nursing and Midwifery faculty of Isfahan. Methods:This descriptive analytical study was performed on 75 nursing students in their last term. A two-part questionnaire included questions on demographic information and factors to assess clinical training problems in six major areas of problems: problems related to learner, clinical instructor, clinical environment, patient, educational program and clinical evaluation. Data analysis was performed in SPSS software. Results:After analyzing the data the following results were obtained: most of the problems were related to the clinical instructor 78%, learners 73%, clinical environment 71%, clinical training program 66%, clinical evaluation 60% and patient-related problems 43%. Conclusions:Results of this article showed that there are problems in clinical training in nursing, especially in fields that are related to learner and clinical instructor. Due to the fact that Clinical Education is the fundamental part of clinical training and in this type of training, students in interaction with instructors and the environment, apply the learned concepts in the clinical field, by understanding nursing and midwifery clinical education problems, the planners will be able to design good educational programs to increase the quality of health services to all people. Therefore, to reach this goal there is a need to more assessment and continuous clinical evaluation processes

Nursing Students’ viewpoints about Problems of Clinical education

Background:Clinical training is fundamental part of nursing education program and causes the student to apply the theoretical knowledge in caring for patients. The nature and duties of nursing in community is such a special issue that doubles the sensitivity of coordination between theoretical courses and clinical services. About half of nursing and midwifery training time is spent on clinical training but there are many factors that affect the process of clinical education. Therefore the aim of this study is assessing the problems of clinical training in nursing students in clinical environments in Nursing and Midwifery faculty of Isfahan. Methods:This descriptive analytical study was performed on 75 nursing students in their last term. A two-part questionnaire included questions on demographic information and factors to assess clinical training problems in six major areas of problems: problems related to learner, clinical instructor, clinical environment, patient, educational program and clinical evaluation. Data analysis was performed in SPSS software. Results:After analyzing the data the following results were obtained: most of the problems were related to the clinical instructor 78%, learners 73%, clinical environment 71%, clinical training program 66%, clinical evaluation 60% and patient-related problems 43%. Conclusions:Results of this article showed that there are problems in clinical training in nursing, especially in fields that are related to learner and clinical instructor. Due to the fact that Clinical Education is the fundamental part of clinical training and in this type of training, students in interaction with instructors and the environment, apply the learned concepts in the clinical field, by understanding nursing and midwifery clinical education problems, the planners will be able to design good educational programs to increase the quality of health services to all people. Therefore, to reach this goal there is a need to more assessment and continuous clinical evaluation processes

Statistical Confirmation of a Stellar Upper Mass Limit

We derive the expectation value for the maximum stellar mass (m_max) in an ensemble of N stars, as a function of the IMF upper-mass cutoff (m_up) and N. We statistically demonstrate that the upper IMF of the local massive star census observed thus far in the Milky Way and Magellanic Clouds clearly exhibits a universal upper mass cutoff around 120 - 200 M_sun for a Salpeter IMF, although the result is more ambiguous for a steeper IMF.Comment: PDF, 5 pages, 4 figures. Accepted to the Astrophysical Journal Letter

An experimental demonstration of single photon nonlocality

In this letter we experimentally implement a single photon Bell test based on the ideas of S. Tan et al. [Phys. Rev. Lett., vol. 66, 252 (1991)] and L. Hardy [Phys. Rev. Lett.,vol. 73, 2279 (1994)]. A double heterodyne measurement is used to measure correlations in the Fock space spanned by zero and one photons. Local oscillators used in the correlation measurement are distributed to two observers by co-propagating it in an orthogonal polarization mode. This method eliminates the need for interferometrical stability in the setup, consequently making it a robust and scalable method.Comment: 4 pages, 3 figures, revtex4 forma

Correspondence Between Classical and Quantum Theory by ff-Deformed Coherent State

Generalized $f$-coherent state approach in deformation quantization framework is investigated by using a $\ast$-eigenvalue equation. For this purpose we introduce a new Moyal star product called $f$-star product, so that by using this ${\ast}_{f}$-eigenvalue equation one can obtain exactly the spectrum of a general Hamiltonian of a deformed system.Comment: Presented in QTRF-6, June 11-14, 2012-Swede