Coupled-channels Faddeev AGS calculation of K−ppnK^{-}ppn and K−pppK^{-}ppp quasi-bound states

Using separable $\bar{K}N-\pi\Sigma$ potentials in the Faddeev equations, we calculated the binding energies and widths of the $K^{-}pp$, $K^{-}ppn$ and $K^{-}ppp$ quasi-bound states on the basis of three- and four-body Alt-Grassberger-Sandhas equations in the momentum representation. One- and two-pole version of $\bar{K}N-\pi\Sigma$ interaction are considered and the dependence of the resulting few-body energy on the two-body $\bar{K}N-\pi\Sigma$ potential was investigated. The $s$-wave [3+1] and [2+2] sub-amplitudes are obtained by using the Hilbert-Schmidt expansion procedure for the integral kernels. As a result, we found a four-body resonance of the $K^{-}ppn$ and $K^{-}ppp$ quasi-bound states with a binding energy in the range $B_{K^{-}ppn}\sim{55-70}$ and $B_{K^{-}ppp}\sim{90-100}$ MeV, respectively. The calculations yielded full width of $\Gamma_{K^{-}ppn}\sim{16-20}$ and $\Gamma_{K^{-}ppp}\sim{7-20}$ MeV.Comment: 16 pages, 4 figure

Educational Ethics in Academic Environment: Medical Students' Perspectives

Background and Objective: Educational ethics imply values such as honesty, reliance on one's own personal effort, not to abuse the efforts of others, and respect the dignity and respect for others. Students are faced with different situations in which they show various moral and immoral behaviors. This study aimed to explore medical students' viewpoints and experiences at Golestan University of Medical Sciences about ethics in academic environment in 2013. Materials and Methods: In this qualitative study a purposive sampling was used with maximum variation and 12 medical students participated in the research. Data was gathered using semi-structured interviews. At least an open question "When I say ethics in education or educational environment, what comes to your mind" was repeated in all the interviews. The interviews recorded and transcribed line by line and then analyzed according to "conventional content analysis" method. Results: "Respecting teacher dignity", "preserving dignity of classroom", "respecting and maintaining dignity for classmates", "seeking for knowledge and sciences” emerged as the main themes of the current study. Conclusion: University students considered learning environment as a sacred place; conforming its expected rules and ethics would be mandatory. Abnormal behavior causes not only loss of students dignity but also could be harmful to the calmness of educational atmosphere and may evoke different unpleasant pessimistic ideas about such academic environment

GASA-JOSH: a Hybrid Evolutionary-Annealing Approach for Job-Shop Scheduling Problem

The job-shop scheduling problem is well known for its complexity as an NP-hard problem. We have considered JSSPs with an objective of minimizing makespan. In this paper, we develope a hybrid approach for solving JSSPs called GASA-JOSH. In GASA-JOSH, the population is divided in non-cooperative groups. Each group must refer to a method pool and choose genetic algorithm or simulated annealing to solve the problem. The best result of each group is maintained in a solution set, and then the best solution to the whole population is chosen among the elements of the solution set and reported as outcome. The proposed approach have been compared with other algorithms for job-shop scheduling and evaluated with satisfactory results on a large set of JSSPs derived from classical job-shop scheduling benchmarks. We have solved 23 benchmark problems and compared results obtained with a number of algorithms established in the literature

An Effective Multi-Population Based Hybrid Genetic Algorithm for Job Shop Scheduling Problem

The job shop scheduling problem is a well known practical planning problem in the manufacturing sector. We have considered the JSSP with an objective of minimizing makespan. In this paper, a multi-population based hybrid genetic algorithm is developed for solving the JSSP. The population is divided in several groups at first and the hybrid algorithm is applied to the disjoint groups. Then the migration operator is used. The proposed approach, MP-HGA, have been compared with other algorithms for job-shop scheduling and evaluated with satisfactory results on a set of JSSPs derived from classical job-shop scheduling benchmarks. We have solved 15 benchmark problems and compared results obtained with a number of algorithms established in the literature. The experimental results show that MP-HGA could gain the best known makespan in 13 out of 15 problems

رفتارهای نامحترمانه در محیط کار پرستاران: یک مطالعه کیفی Uncivil Behaviors in Nursing Workplace: A Qualitative Study

مقدمه: رفتارهای نامحترمانه در محیط‌های بالینی تهدید آمیز می‌باشند و منجر به خطر انداختن سلامت پرستاران و بیماران در محیط‌های بالینی و درمانی می‌گردد. نتایج نامطلوب آن با عدم رضایت شغلی و ترک محل کار همراه است. این مطالعه با هدف تبیین رفتارهای نامحترمانه در محیط کار پرستاران انجام شده است روش کار: در این مطالعه کیفی پنجاه نفر از پرستاران شاغل در مرکز آموزشی درمانی تحت پوشش دانشگاه علوم پزشکی گلستان با روش نمونه گیری مبتنی بر هدف و با حداکثر تنوع مورد بررسی قرار گرفتند. داده‌ها از طریق مصاحبه‌های نیمه ساختار تا رسیدن به اشباع داده‌ها جمع آوری و با رویکرد تحلیل محتوای کیفی مرسوم تحلیل شدند یافته‌ها: 80 درصد مشارکت کنندگان زن، با سابقه کار 3 تا 20 سال بوده‌اند. رفتار نامحترمانه با مفاهیم "حقارت"، "پرخاشگری کلامی- غیر کلامی"، "تهدید"، "سرزنش شدن"، "نادیده گرفتن توانمندی‌ها"، "مشارکت داده نشدن"، در تعامل با همکاران، مافوق، پزشک، بیماران، همراهان، کادر خدماتی همراه بوده است. مشارکت کنندگان رفتار نامحترمانه از همراهان را در طیفی از خفیف تا شدید تجربه کردند و آن را بسیار تنش زا می‌دانستند در حالی که توهین از جانب بیمار را کمتر شخصی می‌پندارند و به دلیل وضعیت سلامتی و استرس بیمار آن را بهتر تحمل می‌کنند. مشارکت کنندگان همواره بهترین راه مقابله برای پاسخ به رفتار نامحترمانه را نمی‌دانستند، با مسبب رفتار توهین آمیز مقابله‌ای نمی‌کردند یا آن رفتار را گزارش نمی‌کردند نتیجه گیری: یافته‌ها نشان داد رفتارهای نامحترمانه به درجات و در ابعاد مختلف در محیط کاری پرستاران رخ می‌دهد و تداوم چنین رفتارها و احساس عدم وجود منابع حمایتی می‌تواند سبب سبب یاس از حرفه کاری و استرس گرد

Local stabilisation of polar order at charged antiphase boundaries in antiferroelectric (Bi_0.85Nd_0.15)(Ti_0.1Fe_0.9)O₃

Observation of an unusual, negatively-charged antiphase boundary in (Bi<sub>0.85</sub>Nd<sub>0.15</sub>)(Ti<sub>0.1</sub>Fe<sub>0.9</sub>)O<sub>3</sub> is reported. Aberration corrected scanning transmission electron microscopy is used to establish the full three dimensional structure of this boundary including O-ion positions to ~ ± 10 pm. The charged antiphase boundary stabilises tetragonally distorted regions with a strong polar ordering to either side of the boundary, with a characteristic length scale determined by the excess charge trapped at the boundary. Far away from the boundary the crystal relaxes into the well-known Nd-stabilised antiferroelectric phase

A study on the ethical components of nursing practice (moral distress, ethical sensitivity, ethical decision)

This paper is an applied research in terms of objective and a descriptive research in terms of method. Having prepared the research plan, a questionnaire was designed based on goals and hypotheses of the research and was sent to the statistical universe. Also this paper is a field research in terms of data collection. As regards theoretical bases of the research, library data collection method has been applied. So, the required data has been gathered by referring to the related references, books, libraries and so on. To design a questionnaire and gather the opinions of the statistical universe members, field study method and researcher-made questionnaire have been used. The statistical universe comprises nurses and head of ICU and head nurses of Najmieh Hospital in Tehran. The respondents were selected by random sampling method. Also to estimate sample size, Morgan table was applied. The statistical universe consists of 65 members and according to the table, 56 questionnaires were determined for the research. So 60 questionnaires were sent and 58 ones were returned. Face and content validity of the research tool were approved by experts. The test reliability was estimated 0.777 by calculating Cronbach's alpha coefficient. In this paper, factor analysis based on partial least squares structural equations method has been applied to analyze more important factors and coefficients, estimate independent variables coefficients and even determine effectiveness of each independent variable on each other and determine appropriateness of the questions and their coefficients in explaining the related index. The main result of this paper presents a proper model for the relation of effective variables on nurse performance by using regression model. © IDOSI Publications, 2014

Novel nanorod precipitate formation in neodymium and titanium codoped bismuth ferrite

The discovery of unusual nanorod precipitates in bismuth ferrite doped with Nd and Ti is reported. The atomic structure and chemistry of the nanorods are determined using a combination of high angle annular dark field imaging, electron energy loss spectroscopy, and density functional calculations. It is found that the structure of the BiFeO3 matrix is strongly modified adjacent to the precipitates; the readiness of BiFeO3 to adopt different structural allotropes in turn explains why such a large axial ratio, uncommon in precipitates, is stabilized. In addition, a correlation is found between the alignment of the rods and the orientation of ferroelastic domains in the matrix, which is consistent with the system's attempt to minimize its internal strain. Density functional calculations indicate a finite density of electronic states at the Fermi energy within the rods, suggesting enhanced electrical conductivity along the rod axes, and motivating future investigations of nanorod functionalities