Examining the relationship between Organizational Justice and Organizational Citizenship Behavior at Islamic Azad University in Ardabil province

The main subject of this research is significant relationship between details of organizational justice and citizenship behavior, or not, what is the relation between organizational justice and citizenship behavior? For this reason, we investigate organizational justice and citizenship behavior. The organizational justice dimensions (distributive justice, procedural justice, interpersonal justice, informational justice) along with organizational citizenship behaviors constructs form the basis of the hypotheses. This study is based on a correlation and the statistical population consists of all the academy members as well as employees of Islamic Azad University Branches of Ardebil province. According to Cochran sample volume method , 246 persons has been selected from 1067 persons. In order to collect information , a questionnaire containing 24 questions was designed an distributed among the sample members. Finally , 222 completed questionnaire was collected. Statistical validity is confirmed by the authorities and the reliability coefficients for organizational justice questionnaire 94% and for Organizational Citizenship Behavior questionnaire93%. The results of the statistical analysis within the framework of correlation coefficient show that among the organizational justice and its dimensions(distributive justice, procedural justice, interpersonal justice, informational justice) has a significant relationship with organizational citizenship behaviors of employees

DISTRIBUTION NETWORK OPERATION WITH SOLAR PHOTOVOLTAIC AND ENERGY STORAGE TECHNOLOGY

Among distributed energy resources, solar photovoltaic (PV) generation has the largest penetration in the distribution networks. Serving electric vehicles (EV) with renewable resource generation would further reduce the carbon footprint of the energy supply chain for electric vehicles. However, the integration of solar PV and EVs in the unbalanced distribution network introduces several challenges including voltage fluctuations, voltage imbalances, reverse power flow, and protection devices’ malfunctions. The uncertainties associated with solar PV integration and electric vehicles operation require significant effort to develop accurate optimization methodologies in the unbalanced distribution systems operation. In this thesis, in order to cope with the uncertainties, we first developed a two-stage optimization problem, to identify the feasible dispatch margins of photovoltaic generation considering the distribution network operation constraints. The dispatch margins of photovoltaic generation are quantified considering the worst-case realization of demand in the distribution network. The linear and the second-order cone mathematical problem formulation is procured to solve the optimal power flow problem. Second, a data-driven distributionally robust optimization framework is proposed for the operation of the unbalanced distribution network considering the uncertainties associated with the interconnected EV fleets and solar PV generation, and the proposed framework leverages the column-and-constraint generation approach. Moreover, to minimize the operation cost and improve the ramping flexibility, a continuous-time optimization problem, is developed and reformulated to a linear programming problem using Bernstein polynomials. Here, a generalized exact linear reformulation of the data-driven distributionally robust optimization is used to capture the worst-case probability distribution of the net demand uncertainties. Furthermore, in this thesis, an interconnection of multi microgrids (MGs) technology is considered a promising solution to handle the variability of the distributed renewable energy resources and improve the energy resilience in the distribution network. The coordination among the microgrids in the distribution network could improve the operation cost, reliability, and security of the distribution network. Therefore, an adaptive robust distributed optimization framework is developed for the operation of a distribution network with interconnected microgrids considering the uncertainties in demand and solar PV generation

A cascading risk model for the failure of the concrete spillway of the Toddbrook dam, England during the August 2019 flooding

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The Explanation of the Role of Organizational Intelligence and Organizational Agility in the Formation of Goal Oriented Commitment

The main purpose of this study was the explanation of the role of organizational Intelligence and organizational agility in the formation of goal oriented commitment. The population was 311 employees of Social Security Hospital in Ardabil. We determined the amount of the sample size using Cochran sampling method when the statistical sample is 172 of these employees which have been selected through the simple random sampling method. To gathering of data, we used questionnaire with 40 items. In order to analyze the data resulted from collected questionnaires deductive and descriptive statistical methods are used. Also, we used Kolmogorov-Smirnov and Durbin Watson Tests to normality of test data.  And to test the hypothesis of the research we used Pearson Correlation and liner Multi-Regression. Findings show that organizational Intelligence and organizational agility have a positive relationship with goal oriented commitment at Social Security Hospital

Dry Eye Syndrome

Our understanding of keratoconjunctivitis sicca (KCS), also known as dry eye syndrome, has been changed over recent years. Until lately, the condition was thought to be merely due to aqueous tear insufficiency. Today, it is understood that KCS is a multifactorial disorder due to inflammation of the ocular surface and lacrimal gland, neurotrophic deficiency and meibomian gland dysfunction. This change in paradigm has led to the development of new and more effective medications

The Effect of Mitomycin-C on Corneal Endothelial Cells after Photorefractive Keratectomy

Purpose: To evaluate short-term changes in central corneal endothelial cell density and morphology after photorefractive keratectomy (PRK) with mitomycin-C (MMC) 0.02% in patients with moderate myopia. Methods: In this prospective interventional case series, patients with moderate myopia (spherical equivalent refractive error from ‑4.0 to ‑8.0 D) underwent PRK with a single intraoperative application of MMC 0.02% for 40 seconds. Specular microscopy was performed preoperatively and repeated 6 months after surgery to determine changes in central corneal endothelial cell density (ECD), mean cell area (MCA) and coefficient of variation in cell size (CV). Results: Overall, 42 eyes of 21 participants with mean age of 26.2±6.3 years underwent surgery. Mean preoperative spherical equivalent refractive error was ‑5.2}1.2 D which was reduced to ‑0.4}0.5 D postoperatively (P < 0.001). Mean ECD was reduced insignificantly from 2,920±363 cells/mm2 preoperatively to 2,802±339 cells/mm2 postoperatively (P = 0.59). Similarly, there was no significant change in MCA or CV at six months (P = 0.76 and 0.52, respectively). Conclusion: Application of MMC 0.02% for 40 seconds during PRK in patients with moderate myopia did not significantly affect central corneal endothelial cell density and morphology after a 6 month follow up period

Current Approaches for Management of Postpenetrating Keratoplasty Astigmatism

A successful corneal graft requires both clarity and an acceptable refraction. A clear corneal graft may be an optical failure if high astigmatism limits visual acuity. Intraoperative measures to reduce postkeratoplasty astigmatism include round and central trephination of cornea with an adequate size, appropriate sutures with evenly distributed tension, and perfect graft-host apposition. Suture manipulation has been described for minimising early postoperative astigmatism. If significant astigmatism remains after suture removal, which cannot be corrected by optical means, then further surgical procedures containing relaxing incisions, compression sutures, laser refractive surgery, insertion of intrastromal corneal ring segments, wedge resection, and toric intraocular lens implantation can be performed. When astigmatism cannot be reduced using one or more abovementioned approaches, repeat penetrating keratoplasty should inevitably be considered. However, none of these techniques has emerged as an ideal one, and corneal surgeons may require combining two or more approaches to exploit the maximum advantages