24 research outputs found
The Impact of ethical leadership on job stress and occupation turnover intention in nurses of hospitals affiliated to Shahrekord University of Medical Sciences
زمینه و هدف: رهبری اخلاقی، زمینه تعهد و وفاداری کارکنان را فراهم می سازد و زمانی که کارکنان به رهبرانشان اعتماد داشته باشند، استرس کاری در میان آنان کاهش یافته و تصمیم جدی مبنی بر ترک خدمت نخواهند داشت. این پژوهش با هدف درک آثار رهبری اخلاقی بر قصد ترک خدمت پرستاران و بررسی میزان استرس کاری به عنوان یک متغیر میانجی در میان رهبری اخلاقی و قصد ترک خدمت آنان صورت گرفته است. روش بررسی: در این مطالعه توصیفی- همبستگی، تعداد 180 نفر از پرستاران شاغل در بیمارستان های دانشگاه علوم پزشکی شهرکرد به صورت تصادفی طبقه ای متناسب با حجم جامعه انتخاب شدند. ابزار گردآوری داده ها شامل پرسشنامه استاندارد رهبری اخلاقی، استرس کاری و قصد ترک خدمت بود. یافته ها: نتایج پژوهش نشان داد که بین رهبری اخلاقی و قصد ترک خدمت رابطه منفی و معنی دار و بین استرس کاری و قصد ترک خدمت رابطه مثبت و معنی داری وجود دارد (به ترتیب 0/58- =β= 0/66 ،β و 0/05>P)؛ همچنین بین رهبری اخلاقی و استرس کاری رابطه منفی و معنی داری مشاهده شد (0/05> P و 29/0- =β). نتیجه گیری: رهبری اخلاقی می تواند باعث کاهش استرس کاری پرستاران و در نتیجه کاهش قصد ترک خدمت آن ها شود؛ لذا مدیران می توانند با گسترش فرهنگ ارزش های اخلاقی و کاهش عوامل استرس زای شغلی باعث افزایش اعتماد، وفاداری و تعهد سازمانی پرستاران و در نتیجه کاهش ترک خدمت آن ها گردند
The impact of information technology on organizations maturity of public and non-public hospitals in Isfahan
زمینه و هدف: یکی از مهمترین حوزه های کاربرد فناوری اطلاعات حوزه بهداشت و درمان می باشد. مطالعات نشان می دهند که فناوری اطلاعات می تواند اثرات شگرفی بر بلوغ بیمارستان ها داشته باشد. در این پژوهش سعی شده است به تاثیر فعالیت های فناوری اطلاعات بر سطوح بلوغ بیمارستان های دولتی و غیردولتی شهر اصفهان پرداخته شود. روش بررسی: این پژوهش به روش توصیفی تحلیلی در سال 1393 انجام گردید. جامعه پژوهش شامل مسئولان و کارشناسان فناوری اطلاعات بیمارستانهای دولتی وغیر دولتی شهر اصفهان به تعداد 164 نفر بود. ابزارگردآوری اطلاعات در این مطالعه پرسشنامه سنجش فعالیت های فناوری اطلاعات و سنجش بلوغ سازمانی شامل مولفه های نوآوری، بهبود دادن و پشتیبانی بود که روایی و پایایی آن تایید گردید. داده ها توسط نرم افزار های17 spss و لیزرل با استفاده از شاخص های آماری توصیفی و آزمون های فریدمن ، مدلسازی معادلات ساختاری و رگرسیون مورد تجزیه و تحلیل قرار گرفتند. یافته ها: میانگین و انحراف معیار متغیر فناوری اطلاعات66/0 ± 21/3 و مولفه های بلوغ سازمانی شامل نوآوری78/0 ± 25/3 ، بهبود دادن67/0 ± 48/3 و پشتیبانی66/0± 22/3 بود. نتایج این مطالعه نشان داد متغیر فن آوری اطلاعات به ترتیب بیشترین پیش بینی را برای متغیرهای پشتیبانی، بهبود دادن، نو آوری و بلوغ سازمانی داشت. نتیجه گیری: فعالیت های فناوری اطلاعات می تواند سازمان را به سمت سازمانی بلوغ یافته هدایت نموده و در پشتیبانی، نوآوری و بهبود سازمان نقش موثری را ایفا نماید. بنابراین به مدیران پیشنهاد می شود با اقداماتی نظیر استفاده از نیروی متخصص و دارای دانش فنی، در زمینه فناوری اطلاعات و سیستم های اطلاعاتی ،تشکیل کمیته راهبردی فناوری اطلاعات و ... تجدید نظر به عمل آورند
Hydrothermal analysis of Ag and CuO hybrid NPs suspended in mixture of water 20%+EG 80% between two concentric cylinders
This paper investigates the mixture of hybrid nanofluid (NF) flow between two concentric cylinders numerically. Ethylene glycol (80%) and water (20%) comprise the base fluid. Additionally, copper oxide (CuO) and silver (Ag) NPs are added. The hybrid NF flows between the two coaxial cylinders is studied. The inner cylinder is fixed and the outer cylinder is rotating. A radial magnetic field also affects fluid flow, and joule heating joule heating is also considered. The transformed system of nonlinear ordinary differential equations is solved numerically using the fifth-order Runge-Kutta method. Numerical solutions are obtained for fluid velocity and velocity gradient, fluid temperature and temperature gradient, pressure, surface friction coefficient and Nusselt number under the influence of different variables. The computer code is validated by comparing the variation of temperature of hybrid nanofluid with the numerical published data, a good agreement was observed. As the magnetic field parameter is increased, the fluid's velocity reduces. The fluid temperature increases as the magnetic field parameter and Brinkman number were increased. The skin friction coefficient increases with the enhancement of volume percentage and the magnetic field parameter. The Nusselt number rises with increasing of the magnetic field and Brinkman number
Vitamin D supplementation and risk of hypercalciuria in stone formers
Introduction. Whether administrating of vitamin D supplements increases the risk of hypercalciuria is still unanswered. The aim of the present study was to determine whether use of vitamin D supplementation might increase the risk of hypercalciuria. Methods and Materials. This interventional study was conducted on 30 who suffered from vitamin D insufficiency and deficiency and also had a history of nephrolithiasis. The patients were treated with vitamin D supplement (50000 units per week for 2 months and then every 2 weeks until the end of the 3rd month). Serum and urinary biomarkers were measured at baseline and 3 months after start of vitamin D therapy. Results. Administrating vitamin D supplement for 3 months led to a significant increase in serum level of 25-hydroxyvitamin D from 10.4 ± 4.2 ng/mL to 44.0 ± 10.7 ng/mL (P <.001). Also, the median level of serum parathyroid hormone was significantly reduced from 53 ng/L (interquartile range, 22 ng/L to 163 ng/L) to 38 ng/L (interquartile range, 16 ng/L to 102 ng/L; P <.001). There was also a significant increase in urinary citrate after using vitamin D supplement compared with the baseline from 341 mg (interquartile range, 90 mg to 757 mg) to 411 mg (interquartile range, 115 mg to 1295 mg; P =.045). Comparing biochemical parameters between the groups who developed 15 and greater and less than 15 increase in urinary calcium showed no significant difference after treatment. Conclusions. The use of vitamin D supplements in conventional dose in patients with vitamin D deficiency may not lead to increased risk of hypercalciuria. © 2019, Iranian Society of Nephrology. All rights reserved
Unsteady time-dependent incompressible Newtonian fluid flow between two parallel plates by homotopy analysis method (HAM), homotopy perturbation method (HPM) and collocation method (CM)
Analytical and numerical analyses have performed to study the problem of the flow of incompressible Newtonian fluid between two parallel plates approaching or receding from each other symmetrically. The Navier–Stokes equations have been transformed into an ordinary differential equation using a similarity transformation. The powerful analytical methods called collocation method (CM), the homotopy perturbation method (HPM), and the homotopy analysis method (HAM) have been used to solve nonlinear differential equations. It has been attempted to show the capabilities and wide-range applications of the proposed methods in comparison with a type of numerical analysis as fourth-order Runge–Kutta numerical method in solving this problem. Also, velocity fields have been computed and shown graphically for various values of physical parameters. The objective of the present work is to investigate the effect of Reynolds number and suction or injection characteristic parameter on the velocity field. Keywords: Homotopy analysis method (HAM), Collocation method (CM), Homotopy perturbation method (HPM), Parallel porous plates, Unsteady flo
Epidemiology of culture-negative peritonitis in iranian patients on continuous ambulatory peritoneal dialysis
Introduction. Culture-negative peritonitis is a major challenge in the treatment of peritonitis in continuous ambulatory peritoneal dialysis (CAPD). This study aimed to evaluate the culture-negative peritonitis in patients from the Iranian CAPD Registry. Materials and Methods. Data of 1472 patients from 26 CAPD centers were analysed. Peritonitis was defined as any clinical suspicion together with peritoneal leukocyte count of 100/mL and more. Results. The patients had been on PD for a mean of 500 ± 402 days. There were a total of 660 episodes of peritonitis observed among 299 patients (peritonitis rate of 1 episode in 34.1 patient-months). Excluding patients with both negative and positive culture results, there were 391 episodes of peritonitis in 220 patients (174 culturepositive episodes in 97 patients and 217 culture-negative episodes in 123). The 1- to 4-year patient survival rates were 85, 75, 69, and 59 for the patients with culture-positive peritonitis, and 92, 78, 73 and 63 for the patients with culture-negative peritonitis, respectively (P =.34). The technique survival rates were 90, 57, 42, and 27 and 95, 85, 74, and 40, respectively (P =.001). On follow-up, there were higher rates of active PD patients, lower rates of PD dropouts, and higher rates of kidney transplantation in patients with culture-negative peritonitis compared to those with culture-positive peritonitis. Conclusions. In our patients, the prevalence of culture-negative peritonitis was high (55.9). Patient survival with culture-negative peritonitis was comparable to those with culture-positive peritonitis and technique survival was higher among those with culturenegative peritonitis