scholarly journals Study on Axial Clearance Size and Leakage of Canned Motor Pump under Axial Force Self-Balance State

2022 ◽  
Vol 2160 (1) ◽  
pp. 012082
Author(s):  
Faye Jin ◽  
Ran Tao ◽  
Ruofu Xiao

Abstract Canned motor pump is widely used in chemical industry. Due to the particularity of its application, it is necessary to ensure that the medium does not leak completely. If the axial force of impeller is too large, it will directly affect the performance of canned motor pump. Therefore, the floating impeller could be used in the pump to balance the axial force. In this paper, the relationship between axial clearance and leakage rate at the key part of canned motor pump is studied by means of numerical calculation and experimental verification. It is found that the fitting curve is highly consistent with the calculated value, which provided a good theoretical basis for further study of axial clearance control axial force and experimental axial force self-balance. In addition, the leakage rate increases with the increase of axial clearance. The static pressure in the axial clearance first increases and then decreases with the decrease of radius, and the maximum static pressure value is about 10.5% ∼ 15.8% near the clearance inlet. This study is of great significance to the theoretical research on the self-balance state of axial force of impeller.

2021 ◽  
Vol 12 (3) ◽  
Author(s):  
Natalya Fontalova ◽  
Yulia Ryumkina

The article examines the relationship between the need for power and the system of life meanings among modern youth. The needs for power and the systems of life meanings of young men and women are compared. The theoretical basis of the research consists of scientific and theoretical approaches of psychologists to understanding the need for power, as well as approaches to the study of life meanings. Theoretical research methods and techniques are analysis and systematization of psychological literature on the research problem. Empirical methods are survey and testing: methodology "Research of the system of life meanings" by V.Yu. Kotlyakov. The technique allows to determine the content of value system and the sequence of its representation in the system of life meanings. Methodology test questionnaire "Motive of power" by E.P. Ilyina is aimed to determine a person's ability to exercise their will despite the resistance of other people. Statistical methods are methods of quantitative and qualitative analysis of empirical data. As a result of the empirical study the authors formulated and proposed recommendations for psychological support of young people. The results of the study made it possible to clarify the relationship between the need for power and the system of life meanings in modern youth.


1993 ◽  
Vol 2 (3) ◽  
pp. 52-55 ◽  
Author(s):  
Michael Collins ◽  
Robert McDonald ◽  
Robert Stanley ◽  
Timothy Donovan ◽  
C. Frank Bonebrake

This report describes an unusual and persistent dysphonia in two young women who had taken a therapeutic regimen of isotretinoin for intractable acne. We report perceptual and instrumental data for their dysphonia, and pose a theoretical basis for the relationship of dysphonia to this drug. We also provide recommendations for reducing the risk of acquiring a dysphonia during the course of treatment with isotretinoin.


Author(s):  
V. Tusheva

The determinants of value orientations of a teacher of higher artistic education are identified, qualitative and instrumental properties of a teacher’s consciousness are determined, the relationship between value and sense-bearing processes at the level of cultural and personal senses and outlook priorities correlated with the main messages of postnonclassical science are revealed in the article on the bases of humanistic personally oriented paradigm. Different vectors of deployment of consciousness (self-consciousness) as a teacher’s personal formation in artistic education are considered, the positions which lay the theoretical basis for the development of value and sense-oriented learning, its multicultural, pedagogical and individual-personal contexts are formulated.


Author(s):  
Natalia Popova

The concept of Europeanization has become quite fashionable in EU studies in recent years. It is often used for the analysis of the relations between the EU and non-member states. The aim of the article is to examine the possibilities of its application in explaining the relationship between the EU and Ukraine. The structure of the article is as follows: firstly, the concept of Europeanization is defined considering such two disputable issues as distinguishing among concepts of Europeanization and European integration as well as Europeanization and EU-ization. Next, the evolution of the theoretical research of Europeanization and definition of this concept are analyzed. Two main mechanisms of Europeanization (conditionality and socialization) are examined. The author considers main approaches to the analysis of the "external" Europeanization emphasizing the concept of "external governance". Three groups of factors which influence the effectiveness of Europeanization are briefly analyzed. And finally, the peculiarities of application of the Europeanization concept to the Ukraine-EU relations are outlined. Keywords: EU, Ukraine, Europeanization, EU-ization, ‘external’ Europeanization, conditionality, socialization, concept of ‘external governance’


2021 ◽  
pp. 106591292110072
Author(s):  
Michael Tesler

This article argues that the unusually large and persistent association between Islamophobia and opposition to President Obama helped make attitudes about Muslims a significant, independent predictor of Americans’ broader partisan preferences. After detailing the theoretical basis for this argument, the article marshals repeated cross-sectional data, two panel surveys, and a nationally representative survey experiment, to test its hypotheses. The results from those analyses show the following: (1) attitudes about Muslims were a significantly stronger independent predictor of voter preferences for congress in 2010–2014 elections than they were in 2004–2008; (2) attitudes about Muslims were a significantly stronger independent predictor of mass partisanship during Obama’s presidency than they were beforehand; and (3) experimentally connecting Obama to Democratic congressional candidates significantly increased the relationship between anti-Muslim sentiments and Americans’ preferences for Republican congressional candidates. The article concludes with a discussion of the implications of these results for American politics in the Trump era.


2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Dexin Shen ◽  
Lingao Ju ◽  
Fenfang Zhou ◽  
Mengxue Yu ◽  
Haoli Ma ◽  
...  

AbstractProstate cancer (PCa) is one of the most commonly diagnosed human cancers in males. Nearly 191,930 new cases and 33,330 new deaths of PCa are estimated in 2020. Androgen and androgen receptor pathways played essential roles in the pathogenesis of PCa. Androgen depletion therapy is the most used therapies for primary PCa patients. However, due to the high relapse and mortality of PCa, developing novel noninvasive therapies have become the focus of research. Melatonin is an indole-like neurohormone mainly produced in the human pineal gland with a prominent anti-oxidant property. The anti-tumor ability of melatonin has been substantially confirmed and several related articles have also reported the inhibitory effect of melatonin on PCa, while reviews of this inhibitory effect of melatonin on PCa in recent 10 years are absent. Therefore, we systematically discuss the relationship between melatonin disruption and the risk of PCa, the mechanism of how melatonin inhibited PCa, and the synergistic benefits of melatonin and other drugs to summarize current understandings about the function of melatonin in suppressing human prostate cancer. We also raise several unsolved issues that need to be resolved to translate currently non-clinical trials of melatonin for clinic use. We hope this literature review could provide a solid theoretical basis for the future utilization of melatonin in preventing, diagnosing and treating human prostate cancer.


SAGE Open ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 215824402110095
Author(s):  
Jakub Dostál

The economic value of volunteering is an increasingly important part of volunteering management. It has become part of public policies. Some requests for proposals (RFP) enable nonprofits to include the value of volunteer time in compulsory co-financing. These RFP include the European Economic Area (EEA) Grants and Norway Grants. This article addresses the relationship in the value of volunteering, also called in-kind volunteering contributions. The research includes two case studies of finances from EEA and Norway Grants in the Czech Republic: the Czech NGO Programme, responsible for allocating grants between 2009 and 2014, and the Active Citizens Fund, responsible for allocating grants between 2014 and 2021. They share elements through the EEA and Norway Grants rules. However, they use different types of specialist replacement wages. The article summarizes the arguments for including in-kind volunteering contributions. It presents the possible values of these contributions in the selected cases, including the relationship between the type of volunteering and the number of hours necessary to achieve these values. The article defines the theoretical basis for calculating the value of in-kind volunteer contributions and illustrates this with real examples of allocations from EEA and Norway Grants.


2021 ◽  
pp. 1-13
Author(s):  
Hajar Boutmaghzoute ◽  
Karim Moustaghfir

BACKGROUND: This study builds on the little guidance in the existing literature to analyze the relationship between employee-oriented CSR actions and employee retention in a business context, while using Freeman stakeholders’ model as a theoretical research framework. This research also aims to shed light on significant behavioral factors facilitating the relationship between CSR endeavors and turnover rate. OBJECTIVE: This paper builds on the existing research gap in the literature and suggests that behavioral factors, including job satisfaction, organizational identification, and motivation facilitate the relationship between employee-oriented CSR actions and employee retention, which contributes to laying the foundations of a theoretical framework that has the potential to advance both theoretical and practitioner debates and disentangle the complexity of such a relationship, while offering strategically-focused development venues in CSR and HRM fields. METHODS: This research uses a single case study design to ensure an in-depth and detailed analysis of the phenomenon under scrutiny, while relying on a triangulation methodology for data collection, including a questionnaire used as exploratory approach, interviews to generate explanatory data, and archival data to bring confirmatory insights. Data analysis followed the procedures of a deductive approach. RESULTS: The research results show a positive relationship between employee-oriented CSR actions and employee retention, while demonstrating the facilitating role of job satisfaction, organizational identification, and motivation in moderating such a relationship. The findings also stress the importance of framing CSR interventions within the organization’s strategy and goals, while ensuring employee participation in such decision making processes to maximize the effect of CSR interventions on employee commitment and reduce turnover. CONCLUSIONS: This research has the potential to better clarify the nature of the relationship involving CSR interventions, from an employee perspective, retention, and turnover, while laying the foundations of a theoretical framework linking such constructs and other behavioral factors that underpin and support such a relationship. Building on the study’s findings and assumptions, future research is needed to gain a more comprehensive understanding of how HR-related CSR actions affect behavioral performance dimensions, resulting in employee commitment and retention. Future research should also consider multiple case study, multicultural, and ethnographic approaches for the sake of generalizability and theory building.


2012 ◽  
Vol 209-211 ◽  
pp. 23-27
Author(s):  
Gang Lv

This paper mainly discusses the important role of the Chinese ancient view –“harmony between man and nature” in modern design. It focuses on the analysis of popular concepts of “environment orientation” and “people orientation” in environmental design, and holds the view that the concept of “harmony of man and nature” makes up for the deficiencies of the first two. In dealing with the relationship between man and himself or nature, the concept of “harmony between man and nature” offers a good theoretical basis which will surely become new ethics and standard in design.


2021 ◽  
pp. 1-21
Author(s):  
Tahrima Ferdous ◽  
Muhammad Ali ◽  
Erica French

Abstract Flexible work practices (FWPs) give employees some control over when and where they work. Using boundary theory and role balance theory, this study proposes and tests a mediation model focusing on how the relationships between FWPs usage and employee outcomes (i.e., wellbeing and turnover intention) are mediated by work−life balance (WLB). It also tests the moderating role of employee age on the relationship between WLB and employee outcomes using socioemotional selectivity theory. The model was tested using survey data from 293 employees of an Australian for-profit organization. The findings indicate that FWPs usage is positively associated with WLB, WLB is positively associated with wellbeing and negatively with turnover intentions, and WLB partially mediates the relationships between FWPs usage and employee outcomes. The results provide partial support that employee age moderates the relationship between WLB and turnover intentions. Theoretical, research and practical contributions are discussed.


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