scholarly journals A Study of The Developing Archimedes Screw as A Turbine

Author(s):  
Dewi Puspita Sari ◽  
M.A. Ade Saputra ◽  
Imam Syofii ◽  
Dendy Adanta

Electricity plays an imperative role in improving the rural or remote community economic growth and quality of life. The pico hydro type Archimedes screw turbine (AST) is considered an independent power plant in rural or remote areas. The advantages of the AST are friendly to aquatic biota, the high and stable efficiency (electrical efficiency of 30% to 49%), and can operate in a run of river conditions. However, although this technology has been studied ± two decades, there is still no theory explaining the relationship between conversion energy, the geometry of screws, and efficiency. Therefore, the development of Archimedes screw focuses on the role of a converter water energy categorized as the environmentally friendly power plant. Thus, this paper aims to describe the future work required for the AST so that the basic principles and empirical theories are found. Based on reviews, the AST design can use Rorres and Muller & Senior analysis, AC generators with a pulley and toothed belt transmission systems, and do not immerse the outflow bucket side in the water. Furthermore, for AST to be better, several studies need to be done such as the method of manufacturing precision screws, the effect bubbles in the bucket and how to avoid them, determination optimum of the head and screw length using the slope angle, and investigation of the ratio of the inlet velocity with the angular velocity of a wheel on performance to avoid overflow leakage due to loading.

2020 ◽  
Vol 17 (6) ◽  
pp. 76-91
Author(s):  
E. D. Solozhentsev

The scientific problem of economics “Managing the quality of human life” is formulated on the basis of artificial intelligence, algebra of logic and logical-probabilistic calculus. Managing the quality of human life is represented by managing the processes of his treatment, training and decision making. Events in these processes and the corresponding logical variables relate to the behavior of a person, other persons and infrastructure. The processes of the quality of human life are modeled, analyzed and managed with the participation of the person himself. Scenarios and structural, logical and probabilistic models of managing the quality of human life are given. Special software for quality management is described. The relationship of human quality of life and the digital economy is examined. We consider the role of public opinion in the management of the “bottom” based on the synthesis of many studies on the management of the economics and the state. The bottom management is also feedback from the top management.


Author(s):  
Inmaculada García-Martínez ◽  
José María Augusto Landa ◽  
Samuel P. León

(1) Background: Academic engagement has been reported in the literature as an important factor in the academic achievement of university students. Other factors such as emotional intelligence (EI) and resilience have also been related to students’ performance and quality of life. The present study has two clearly delimited and interrelated objectives. First, to study the mediational role that engagement plays in the relationship between EI and resilience on quality of life. Secondly, and similarly, to study the mediational role of engagement in the relationship between EI and resilience, but in this case on academic achievement. (2) Methods: For this purpose, four scales frequently used in the literature to measure emotional intelligence, resilience, academic engagement and quality of life were administered to 427 students of the University of Jaén undertaking education degrees. In addition, students were asked to indicate their current average mark as a measure of academic performance. Two mediational models based on structural equations were proposed to analyse the relationships between the proposed variables. (3) Results: The results obtained showed that emotional intelligence and resilience directly predicted students’ life satisfaction, but this direct relationship did not result in academic performance. In addition, and assuming a finding not found so far, engagement was shown to exert an indirect mediational role for both life satisfaction and academic performance of students. (4) Conclusions: The findings of the study support the importance of engagement in the design and development of instructional processes, as well as in the implementation of any initiative.


2016 ◽  
Vol 27 (4) ◽  
pp. 520-533 ◽  
Author(s):  
Catherine Henshall ◽  
Sheila Greenfield ◽  
Nicola Gale

This article explores the relationship between cancer survivors’ use of self-management practices and their search for normality. Using Frank’s illness narratives and other theoretical literature on normality in chronic illness, it draws on findings from a qualitative study to explore different ways cancer survivors use self-management practices to re-establish normality in their lives post-cancer. The findings suggest that “normality” represents different things to cancer survivors. We suggest that normality in survivorship is not a static concept but is fluid, and at certain times, cancer survivors may display some or all of these different versions of normality. The findings show that self-management practices can help cancer survivors experiment with different health and lifestyle processes to help support their “normal” daily lifestyle activities, quality of life, and well-being.


Author(s):  
Hassan Gharayagh Zandi ◽  
Sahar Zarei ◽  
Mohammad Ali Besharat ◽  
Davoud Houminiyan sharif abadi ◽  
Ahmad Bagher Zadeh

Coaching has often been viewed as a context within which coaches operate to largely bring about changes in athlete’s performance and flourishing. One key factor to successful outcomes in coaching is the quality of the relationship between coaches and athletes. The coach–athlete relationship is at the heart of coaching; however, limited studies have been conducted on its antecedents. The aim of this study was to investigate the relationship between coaches’ forgiveness and perceived relationship quality toward their athletes through verifying the mediating role of interpersonal behaviors of coaches. A total of 270 Iranian coaches participated in the survey, and the data sets were analyzed using structural equation modeling. Results revealed that forgiveness positively predicted the coaches’ perceived relationship quality with their athletes, and this pathway was mediated by the coaches’ interpersonal behaviors.


Author(s):  
Kosara Gotseva ◽  

The scientific report aims to highlight the positive interaction between technology and hotel guests. The relationship between technology and customer experience is examined. The role of innovation as a tool for enhancing the positive experience of tourists is highlighted. The focus is on digital applications and their relationship to satisfaction. The main global trends that demonstrate the impact of hotel automation on visitor satisfaction are outlined. Attention has been focused on research from recent years. The author defends the thesis that guests seek interaction with automation as it directly affects the quality of service and thus enhances their positive experience. Innovation is a key tool for creating a quality experience.


2016 ◽  
Vol 10 (3) ◽  
pp. 117
Author(s):  
Omid Ahmadi ◽  
Abdolali Keshtegar ◽  
Mohammad Ghasemi

<p>The goal of the present paper is to analyze the effect of personnel's education and psychological competence on<br />quality of service. The mediation role of organizational competence in Ministry of the Interior is of<br />descriptive-correlational method. To do that, the standard questionnaire psychological competence by Spriters<br />(1995), personnel education and quality of service by Deher (2015) and organizational commitment by Alen and<br />Mier (1990) were used. The statistical population of the research includes all personnel of Ministry of the<br />Interior which are 1600 subjects. Based on Cochran's formula, 3100 subjects were selected randomly. In order to<br />analyze data the Pearson's correlation test and structural equation of data analysis were used by SPSS and AMOS<br />software. The findings of the research indicate that personnel's education has a positive effect on organizational<br />competence and quality of service (with Alpha level of 0.05). Moreover, the psychological competence is<br />positively affect the quality of service (with Alpha level of 0.05) and organizational commitment affect the<br />quality of service. Finally, it was revealed that the personnel training through organizational commitment affect<br />the quality of service. But, psychological competence does not affect the quality of service through<br />organizational commitment. Moreover, psychological competence does not affect the organizational commitment.<br />The significance levelof the model turned out to be more than the first type error (0.05). This shows that the<br />significant adaption of the estimated model with the present research model. Furthermore, the AGFI and GFI<br />indicators are more than the estimated value (0.9). These indicators show that the model has a capability in<br />estimating the ratio of each factor.</p>


2019 ◽  
Vol 20 (2) ◽  
pp. 105-115
Author(s):  
Suprihadi Suprihadi ◽  
Muh. Syafei

The dual-role of the students of English Education Department Teacher Training and Education Faculty Muria Kudus University as both English language learners and language users gets them to be autonomous, effective, efficient, and strategic readers. The objective of this research is to investigate the relationship between quality of the reading strategy and academic achievement of the students. The subjects of this research were 104 students of EED UMK comprising of all semesters taken randomly. The instrument used was closed-ended questionnaire. The result of this research reveals that there is no relationship between quality of the reading strategy and academic achievement, meaning that the quality of reading strategy does not influence the academic achievement of the students. Implikasions and recommendations for the institution and for further research were proposed.


2020 ◽  
Vol 3 (1) ◽  
pp. 107
Author(s):  
Peter Wekesa Wamalwa ◽  
Edwin Nyongesa Masibo

Teacher education programme is a critical component of education and the life of any society. It normally lays the very foundations of the society. It spurs and pushes the various aspects of development in the society through well-established culture and character of such a society. But for this programme of education to perform this development function efficiently it must be well designed, developed and constantly reformed and modernized so as to keep it abreast with the emerging issues both in education and society. This process is only possible through the conduct of regular studies in education and society to establish new developments and also facilitate the generation of relevant innovations to promote the quality of Teacher education programme. However, there is no evidence that such a process has ever been initiated and conducted in Teacher education programme since the inception of this programme in modern Africa. This paper is designed to explore the importance of Teacher education programme in modern Africa, the relationship between Teacher education programme and development in modern Africa, the roe of this programme in modern Africa, strategies of harnessing the programme for development in modern Africa and the challenges of the programme in modern Africa. This narrative is likely to shade light on the need of Teacher education programme in development in modern Africa and the role of innovative research in this process. Hence, set in motion the desired development in modern Africa.


Author(s):  
Lilian Otaye ◽  
Wilson Wong

Purpose – The purpose of this paper is to explore the contours of fairness by showing how different facets of fairness impact three important employee outcomes (job satisfaction, turnover intention and employer advocacy) and examining the mediating role of quality of management and leadership (through perceptions of both senior management and the quality of exchange with immediate supervisors) in attenuating negative impacts of unfairness on these outcomes. The study extends the concept of fairness beyond the traditional focus on organizational justice and models the mediating role of leadership on the relationship between (un)fairness and the three employee-level outcomes in a sample of employees representative of the UK workforce. Design/methodology/approach – Data were obtained from a nationally representative sample of 2,067 employees in the UK. Exploratory factor analysis and then confirmatory factor analysis is used to refine three unfairness factors and address their dimensionality of the unfairness scale and then multiple regression analysis is used to test a fairness-leadership-employee performance outcome model. Findings – Results of multiple regression analysis revealed that both trust in leadership and leader-member exchange partially mediate the relationship between organizational (un)fairness and job satisfaction, advocacy and turnover intention, respectively. Practical implications – The findings highlight the important role that leaders play in influencing the relationship between perception of unfairness and employee outcomes. This has implications for both theory and practice as it suggests that the pattern of inclusion that leaders create through the relationships that they develop with their followers has a significant impact on the relationship between unfairness and the work outcomes. They not only must manage traditional perceptions of justice, but also the assessments employees make about trust in management judgements and the perceived consequences of such judgements. Originality/value – In an environment where perceptions of unfairness are becoming both more endemic but also more complex, the study shows that both senior leaders and immediate supervisors have important agency in managing negative consequences. Through the measurement of satisfaction, turnover intention and employer advocacy it also provides potential links to link fairness into the engagement literature.


2017 ◽  
Vol 38 (5) ◽  
pp. 696-711 ◽  
Author(s):  
Decha Dechawatanapaisal

Purpose The purpose of this paper is to investigate the mediating effect of organizational embeddedness in the relationship between quality of work life (QWL) and turnover under a foundation of conservation of resources theory. Design/methodology/approach Data were collected from 422 healthcare professionals through a questionnaire survey, and analyzed by means of a confirmatory factor analysis and structural equation modeling. Findings The results indicate that organizational embeddedness has a negative impact on employees’ intention to leave, and on actual turnover. For QWL perception, career opportunities, work life balance, and job characteristics are positive and significant predictors of organizational embeddedness. In addition, organizational embeddedness plays an intermediary role that mediates the relationship between the three components of QWL mentioned earlier and turnover intention, and also between the factor of career opportunities and actual turnover. Research limitations/implications The current research took place within two healthcare organizations. Replicating the study in a variety of business sectors or professions with a larger sample of subjects would be useful for the generalizability of the findings. Practical implications Organizations may improve their retention of employees by offering intrinsic resources that can be obtained from the social contexts of the individual through human resource management system, e.g., growth opportunities, a healthy and caring work life quality. Such motivational resources then develop a sense of obligation toward their places of employment, which influences their intention to stay or leave. Originality/value This study examines the mediating role of organizational embeddedness between employees’ perception of their work life quality and their desire and behavior to withdraw, which is an area of inquiry that has not been fully investigated in the literature.


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