scholarly journals State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

2020 ◽  
Vol 12 (4) ◽  
pp. 1676 ◽  
Author(s):  
Zaher Mundher Yaseen ◽  
Ameen Mohammed Salih Ameen ◽  
Mohammed Suleman Aldlemy ◽  
Mumtaz Ali ◽  
Haitham Abdulmohsin Afan ◽  
...  
Keyword(s):  
Pressure Fluctuation ◽  
Draft Tube ◽  
Hydropower Plant ◽  
Francis Turbine ◽  
Future Research ◽  
Research Directions ◽  
Operation Costs ◽  
Hydropower Plants ◽  
Future Research Directions ◽  
The Relationship

Dam and powerhouse operation sustainability is a major concern from the hydraulic engineering perspective. Powerhouse operation is one of the main sources of vibrations in the dam structure and hydropower plant; thus, the evaluation of turbine performance at different water pressures is important for determining the sustainability of the dam body. Draft tube turbines run under high pressure and suffer from connection problems, such as vibrations and pressure fluctuation. Reducing the pressure fluctuation and minimizing the principal stress caused by undesired components of water in the draft tube turbine are ongoing problems that must be resolved. Here, we conducted a comprehensive review of studies performed on dams, powerhouses, and turbine vibration, focusing on the vibration of two turbine units: Kaplan and Francis turbine units. The survey covered several aspects of dam types (e.g., rock and concrete dams), powerhouse analysis, turbine vibrations, and the relationship between dam and hydropower plant sustainability and operation. The current review covers the related research on the fluid mechanism in turbine units of hydropower plants, providing a perspective on better control of vibrations. Thus, the risks and failures can be better managed and reduced, which in turn will reduce hydropower plant operation costs and simultaneously increase the economical sustainability. Several research gaps were found, and the literature was assessed to provide more insightful details on the studies surveyed. Numerous future research directions are recommended.

Personal Digital Collections

2011 ◽  
pp. 285-304 ◽  
Author(s):  
Paul F. Marty ◽  
Scott Sayre ◽  
Silvia Filippini Fantoni
Keyword(s):  
Cultural Heritage ◽  
System Design ◽  
Lessons Learned ◽  
Future Research ◽  
Digital Collections ◽  
Research Directions ◽  
Digital Collection ◽  
Future Research Directions ◽  
Museum Websites ◽  
The Relationship

Personal digital collections systems, which encourage visitors to museum websites to create their own personal collections out of a museum’s online collections, are the latest trend in personalization technologies for museums and other cultural heritage organizations. This chapter explores the development, implementation, and evaluation of different types of personal digital collection interfaces on museum websites, from simple bookmarking applications to sophisticated tools that support high levels of interactivity and the sharing of collections. It examines the potential impact of these interfaces on the relationship between museums and their online visitors, explores the possible benefits of involving users as co-creators of digital cultural heritage, and offers an analysis of future research directions and best practices for system design, presenting lessons learned from more than a decade of design and development of personal digital collections systems on museum websites.

Hacia una conclusión

2020 ◽  
pp. 322-330
Author(s):  
Allison Margaret Bigelow
Keyword(s):  
Research Ethics ◽  
Indigenous Studies ◽  
Future Research ◽  
Research Directions ◽  
Theoretical Approaches ◽  
Colonial Archives ◽  
History Of ◽  
Future Research Directions ◽  
Historical Silences ◽  
The Relationship

This chapter reviews the major methodological and theoretical approaches used in Mining Language, at once concluding the book and gesturing toward future research directions in the fields of history of colonial science and technology and Indigenous Studies. Specifically, it reflects on the relationship between history and literary studies within these intersecting fields. By reflecting on what colonial archives say and do not say, the conclusion argues for the importance of research ethics and methods that confront, acknowledge, and respond to historical silences.

HOW IS THE PROTESTANT WORK ETHIC RELATED TO THE NEED FOR COGNITION? A FACTOR ANALYTIC ANSWER

2002 ◽  
Vol 30 (8) ◽  
pp. 741-750 ◽  
Author(s):  
Andrew N. Christopher ◽  
Jason R. Jones
Keyword(s):  
Work Ethic ◽  
Need For Cognition ◽  
Hard Work ◽  
Protestant Work Ethic ◽  
Future Research ◽  
Research Directions ◽  
Factor Analytic ◽  
Future Research Directions ◽  
The Protestant Work Ethic ◽  
The Relationship

To examine the relationship between the Protestant work ethic (PWE) and the need for cognition (NFC), 210 Americans completed the Mirels and Garrett (1971) PWE scale and the Cacioppo, Petty, and Kao (1984) NFC scale. Although there was no relationship between the composite PWE scale and NFC, there were relationships between two of three PWE factors and NFC. Specifically, correlational analyses revealed that the PWE factor of hard work as a means to success was negatively related to NFC, whereas the PWE factor of antileisure was positively related to NFC. Results are discussed with respect to the multidimensional structure of various PWE measures. Issues concerning the multifaceted nature of the PWE and future research directions are also considered.

Fulfillment of Sport Spectator Motives: The Mediation Effect of Well-Being

2013 ◽  
Vol 41 (9) ◽  
pp. 1421-1433 ◽  
Author(s):  
TzuShuo Ryan Wang ◽  
Sophia D. Min ◽  
Suk Kyu Kim
Keyword(s):  
Word Of Mouth ◽  
Well Being ◽  
Mediation Effect ◽  
Future Research ◽  
Research Directions ◽  
Revisit Intention ◽  
Future Research Directions ◽  
Sport Spectator ◽  
The Relationship

Spectator motives have been conventionally used to explain sport spectator behavior, such as word-of-mouth recommendations and revisit intention. A review of the literature suggests that the predictability of spectator motives is both inconsistent and context dependent. We proposed that these factors can be reconciled by directly examining the role of spectator well-being in the relationship between spectator motives and repatronage behavior. Our findings revealed that spectator well-being significantly mediates the effects of 5 motives, that is, achievement, aesthetics, knowledge, family, and escape, on sport spectator revisit intention and word-of-mouth recommendations. Future research directions are also discussed.

Parental Warmth and Hostility as Related to Sex Differences in Children's Achievement Orientation

1977 ◽  
Vol 1 (3) ◽  
pp. 229-246 ◽  
Author(s):  
Rebecca Oxford Manley
Keyword(s):  
Sex Differences ◽  
Critical Review ◽  
Future Research ◽  
Parental Warmth ◽  
Achievement Orientation ◽  
Research Directions ◽  
Children's Achievement ◽  
Future Research Directions ◽  
Relationship Of ◽  
The Relationship

This article is a critical review of studies concerning the relationship of parental warmth and hostility to sex-related differences in children's achievement orientation. Parental warmth seemed to operate differently upon girls' and boys' achievement orientation in most of the studies cited. Moderate but not high maternal warmth and even slight hostility were related to strong achievement∗ orientation in girls, while high maternal nurturance and affection were associated with strong achievement orientation in boys. However, the article warns against assuming a simple causal relationship between parental warmth and sex-related differences in children's achievement orientation. Achievement theories, two main parental dimensions, and future research directions are also discussed.

Multi-Dimensional Religiosity and Volunteering in Contemporary Taiwan

2015 ◽  
Vol 43 (4) ◽  
pp. 466-487 ◽  
Author(s):  
Shigenori Terazawa
Keyword(s):  
Case Studies ◽  
Religious Participation ◽  
Future Research ◽  
Research Directions ◽  
Future Research Directions ◽  
The Relationship ◽  
Positive Determinant

While most of the existing research on religion and volunteering has been conducted in Western, predominantly Christian settings, how religion and volunteering are related in non-Western, non-Christian societies have not yet been sufficiently studied. Recently more and more researchers are becoming more interested in religion and volunteering in Taiwan and are conducting case studies on the Tzu Chi Association. However, the relationship between multi-dimensional religiosity and volunteering in Taiwan has not yet been examined. This study attempts to contribute to this literature by analysing one of the most extensive sampling surveys in Taiwan. I found that (1) various kinds of religiosity in Taiwan, other than belonging to Buddhist organisations, have different effects on both religious and secular volunteering; (2) religious volunteering and secular volunteering were different with respect to their correlation with multi-dimensional religiosity; (3) religious participation is a significant factor in promoting respondent’s religious volunteering but it is not a significant factor on respondent’s secular volunteering; (4) some religiosities, such as belief in spirits and karmic charity, are negative determinants of volunteering; and (5) spiritual behaviour is a significant and positive determinant of both religious volunteering and secular volunteering. In addition, the implications and future research directions are discussed.

scholarly journals Perfectionism and Burnout During the COVID-19 Crisis: A Two-Wave Cross-Lagged Study

2021 ◽  
Vol 11 ◽  
Author(s):  
Paola Spagnoli ◽  
Carmela Buono ◽  
Liliya Scafuri Kovalchuk ◽  
Gennaro Cordasco ◽  
Anna Esposito
Keyword(s):  
Structural Equation ◽  
Assessment Tool ◽  
Factor Model ◽  
Equation Modeling ◽  
Future Research ◽  
Research Directions ◽  
Predictive Role ◽  
Future Research Directions ◽  
The Relationship

The current study aims at examining the relationship between the perfectionism two-factor model (i.e., concerns and strivings) and burnout dimensions measured by using the BAT (Burnout Assessment Tool) through a longitudinal study. A two-wave cross-lagged study was conducted using path analysis in SEM (Structural Equation Modeling) of 191 workers. Results confirmed the predictive role of perfectionistic concerns on the burnout dimensions, whereas perfectionistic strivings were not significantly related, suggesting that perfectionism should be monitored by employers and clinicians to prevent employee burnout. Limitations and future research directions are envisaged.

scholarly journals Herding Behaviour in Investment Decision Making: A Review

2019 ◽  
pp. 1-12 ◽  
Author(s):  
Palak Dewan ◽  
Khushdeep Dharni
Keyword(s):  
Review Paper ◽  
Investment Decision ◽  
Future Research ◽  
Research Directions ◽  
Concise Review ◽  
Investment Decision Making ◽  
Future Research Directions ◽  
Fundamental Value ◽  
Relationship Of ◽  
The Relationship

Herding denotes how individuals act together in a group without any centralized direction. Herding is widely studied as it drives asset prices away from the fundamental value and there are concerns it leads to volatility, destabilizes the market and increases the fragility of the financial market. In this paper, a concise review of the literature of herding is provided.  Various types of herding, its significance and occurrences along with the determinants are discussed. Various approaches used for measuring herding have been reviewed.  The relationship of herding along with other variables such as market conditions, volatility, and liquidity is reviewed and studied. For the purpose of drafting the review paper, 79 papers for over three decades have been consulted.  Further, future research directions are included for the benefit of the academicians, researchers and policymakers.

scholarly journals Examining the Relationship between Firm Resources and Firm Performance: An Insight into the Airline Industry

2011 ◽  
Vol 2 (1) ◽  
pp. 27-49
Author(s):  
Evangelos Syrigos ◽  
Lida Kyrgidou
Keyword(s):  
Airline Industry ◽  
Performance Outcomes ◽  
Future Research ◽  
Business Success ◽  
Firm Resources ◽  
Research Directions ◽  
Resource Based View ◽  
Future Research Directions ◽  
Entrepreneurial Activities ◽  
The Relationship

Several scholars have pointed to the benefits that can be acquired by the combination of strategic and entrepreneurial activities with the aim of creating wealth and increased performance outcomes (e.g. Ireland et al., 2003; Sirmon et al., 2007; Monsen and Boss, 2009). In this vein, we employ the Resource-Based View (RBV) of the firm and examine whether the balanced implementation of both opportunity and advantage-seeking activities enhances the relationship between a firm’s resources and its performance outcomes. Using panel data from the airline industry, our findings reveal important implications for business success and for future research directions.

scholarly journals Mini-Review of Studies Testing the Cardiorespiratory Hypothesis With Near-Infrared Spectroscopy (NIRS): Overview and Perspectives

2021 ◽  
Vol 15 ◽  
Author(s):  
Nounagnon Frutueux Agbangla ◽  
Pauline Maillot ◽  
Damien Vitiello
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Cerebral Oxygenation ◽  
Future Research ◽  
Brain Oxygenation ◽  
Research Directions ◽  
Future Research Directions ◽  
And Function ◽  
The Relationship

The cardiorespiratory hypothesis (CH) is one of the hypotheses used by researchers to explain the relationship between cardiorespiratory fitness and cognitive performance during executive functions. Despite the indubitable beneficial effect of training on brain blood flow and function that may explain the link between physical fitness and cognition and the recognition of the near-infrared spectroscopy (NIRS) as a reliable tool for measuring brain oxygenation, few studies investigated the CH with NIRS. It is still not well understood whether an increase in brain flow by training is translated into an increase in cerebral oxygenation. Thus, the objective of this mini-review was to summarize main results of studies that investigated the CH using the NIRS and to propose future research directions.

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