586 research outputs found

    Using Mentoring Enactment Theory To Explore How Saudis Receive Mentorship In Public Sector Organizations With Vision 2030

    Get PDF
    This study explored mentoring relationships inside Saudi’s public sector organizations by applying Mentoring Enactment Theory (MET), developed by Kalbfleisch (2002), which explored the relationships between mentors and proteges in an informal professional way. Relationships based on this theory are considered unique, and mentors and proteges have close relationships (Kalbfleisch, 2007). This study focused on Saudi employees on public sector organizations (N = 505) and what their perception about informal mentoring relationships in their workplace environment. Informal mentoring relationships in public sector organizations of Saudi Arabia was what this study was developed to explore using MET focusing on the informal mentorship between employees. Initiation and maintenance (trust, support, conflict) were specially considered to explore the mentoring relationships in public sector organizations. A quantitative method (survey) has been used to gain Saudi perceptions and thoughts about informal mentoring relationships

    The Degree of Application of Teachers in the First Basic Seminar in Jordan for Teaching Strategies to Teach Reading Comprehension in Arabic in the Light of RAMP Program

    Get PDF
    The study aims to identify the degree of application of the early learner teachers of the strategies of teaching reading comprehension in the Arabic language in light of the RAMP program. The sample consisted of 150 teachers from 39 schools in Ramtha, Jordan, and the results were analyzed using the SPSS software, where the two researchers followed (the descriptive approach) for the purpose of the study. The results showed the teachers' knowledge of the strategies of teaching reading comprehension, the comprehensiveness of its application, and the positive impact it has on the students, where they showed active learning, which contributed to raising their level of comprehension of texts. The results also showed that there are no statistically significant differences which affect the teacher in teaching reading comprehension strategies due to gender, experience, and gender by experience. At the end of the study, a series of proposals and recommendations were presented

    Retrocaval ureter: a report on two neonates

    Get PDF
    Retrocaval ureter is a relatively rare anomaly that usually manifests in the third or the fourth decade of life. Its symptoms are because of ureteric obstruction, caused extrinsically by an abnormal inferior vena cava, intrinsically by ureteric hypoplasia, or both. Surgery is needed for symptomatic patients and involves transection and relocation of the ureter anterior to the inferior vena cava. We report here two neonates as might be very early diagnosed who needed surgery to correct a retrocaval ureter. Keywords: hydronephrosis, retrocaval ureter, neonate

    THERMODYNAMIC ANALYSIS OF A COMBINED SOLID OXIDE FUEL CELL WITH A STEAM TURBINE POWER PLANT FOR MARINE APPLICATIONS

    Get PDF
    The paper presents a combined system to be operated in ship power plants. The system consists of a solid oxide fuel cell (SOFC) and a steam turbine system which utilizes the energy transported with the exhaust gas leaving the fuel cell. The analyzed variant of the combined cycle includes a SOFC and a steam turbine with a single-pressure waste heat boiler. The calculations are performed for two types of SOFC, tubular and planar, each of power output of 18 MW. The assumptions and limits used in the calculations are also presented. The energy optimization of the entire combined ship power plant is carried out, only from a thermodynamic view point. Technical and economic aspects are not taken into consideration. It is found that a high overall efficiency approaching 60% may be achieved with an optimum configuration using SOFC system. The combined system would also reduce emissions, fuel consumption, and improve the total system efficiency

    Ecology of Arabidopsis thaliana : local adaptation and interaction with herbivores

    Get PDF
    As first step the impact of herbivory and abiotic factors on population dynamics of Arabidopsis thaliana were studied. Ceutorhynchus atomus and C. contractus were identified as the major insect herbivores on A. thaliana population, reducing seed production by more than 40%. Mortality from February to April was identified as a key- factor. Next, variation in morphological and life history trait and sutability of A. thaliana as food for weevils for A. thaliana population growing in the dune and inland habitat were studied. These variatioan were genetically and environmentally based. Plants at its home site had the highest fitness, which demonstrates adaptation to local environment. To examine the cause of differences in plant defense we compared herbivory on fruits with data on glucosinolate concentration of seeds, collected in the field. Fruit damage by adult weevils and their larvae was not correlated with field concentration of glucosinolates. We conclude that other factors might also be involved in defense against herbivory by the weevils. Finally, to test if glucosinolates evolve as a contrasting selection pressure by different herbivores we look if the generalist herbivore Spodoptera exigua and the specialist herbivores Plutella xylostella were differently affected by chemical compounds in the leaves. No significant correlations were found between larval weight of P. xylostella and glucosinolates in the leaves but glucosinolates negatively correlated with larval weight of S. exigua. We suggest that generalist herbivores may play a major role in this process.UBL - phd migration 201

    Elastic neural network method for load prediction in cloud computing grid

    Get PDF
    Cloud computing still has no standard definition, yet it is concerned with Internet or network on-demand delivery of resources and services. It has gained much popularity in last few years due to rapid growth in technology and the Internet. Many issues yet to be tackled within cloud computing technical challenges, such as Virtual Machine migration, server association, fault tolerance, scalability, and availability. The most we are concerned with in this research is balancing servers load; the way of spreading the load between various nodes exists in any distributed systems that help to utilize resource and job response time, enhance scalability, and user satisfaction. Load rebalancing algorithm with dynamic resource allocation is presented to adapt with changing needs of a cloud environment. This research presents a modified elastic adaptive neural network (EANN) with modified adaptive smoothing errors, to build an evolving system to predict Virtual Machine load. To evaluate the proposed balancing method, we conducted a series of simulation studies using cloud simulator and made comparisons with previously suggested approaches in the previous work. The experimental results show that suggested method betters present approaches significantly and all these approaches

    Evaluation of the microstructure and mechanical properties of a new modified cast and laser-melted AA7075 alloy

    Get PDF
    The mechanical properties and microstructure of as-cast and homogenized AA7075 were investigated. This alloy was modified by adding transition elements 0.3%Sc + 0.5%Zr, 1%Ti + 0.2%B, and 1%Fe + 1%Ni for use in additive manufacturing applications. After adding Ti + B and Sc + Zr, the structure became uniform and finer with the formation of the Al3(Sc, Zr) and TiB2 phases. Coarse structures were obtained with the formation of an extremely unfavorable morphology, close to a needle-like structure when Fe + Ni was added. The mechanical properties of the modified alloys were increased compared to those of the standard alloy, where the best ultimate tensile strength (UTS) and yield strength (YS) were obtained in the AA7075-TiB alloy compared to the standard alloy in as-cast and homogenized conditions, and the highest hardness value was provided by Fe + Ni additives. The effect of the laser melting process on the microstructure and mechanical properties was investigated. Single laser melts were performed on these alloys using 330 V and a scanning speed of 8 mm/s. During the laser melting, the liquation of the alloying elements occurred due to non-equilibrium solidification. A change in the microstructures was observed within the melt zone and heat-affected zone (HAZ). The hardness of the laser-melted zone (LMZ) after adding the modification elements was increased in comparison with that of the standard alloy. Corrosion testing was performed using a solution of 100 mL distilled water, 3.1 g NaCl, and 1 mL HCl over 5, 10, and 30 min and 1 and 2 h. The corrosion resistance of the alloy modified with FeNi was low because of the non-uniform elemental distribution along the LMZ, but in the case of modification with ScZr and TiB, the corrosion resistance was better compared to that of the standard alloy. © 2019 by the authors.Ministry of Science and Higher Education of the Russian FederationThe author (Asmaa M. Khalil) gratefully acknowledges financial support from the Ministry of Science and Higher Education of the Russian Federation in the framework of Increase Competitiveness Program of MISiS (Support project for young research engineers)
    corecore