scholarly journals Unravelling the Mechanisms that Drive the Performance of Photocatalytic Hydrogen Production

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 901
Author(s):  
Sergio San Martín ◽  
Maria J. Rivero ◽  
Inmaculada Ortiz
Keyword(s):  
Charge Transfer ◽  
Hydrogen Production ◽  
Deep Understanding ◽  
Water Remediation ◽  
Future Research ◽  
Process Variables ◽  
New Materials ◽  
Industrial Level ◽  
The Relationship ◽  
Transfer Mechanisms

The increasing interest and applications of photocatalysis, namely hydrogen production, artificial photosynthesis, and water remediation and disinfection, still face several drawbacks that prevent this technology from being fully implemented at the industrial level. The need to improve the performance of photocatalytic processes and extend their potential working under visible light has boosted the synthesis of new and more efficient semiconductor materials. Thus far, semiconductor–semiconductor heterojunction is the most remarkable alternative. Not only are the characteristics of the new materials relevant to the process performance, but also a deep understanding of the charge transfer mechanisms and the relationship with the process variables and nature of the semiconductors. However, there are several different charge transfer mechanisms responsible for the activity of the composites regardless the synthesis materials. In fact, different mechanisms can be carried out for the same junction. Focusing primarily on the photocatalytic generation of hydrogen, the objective of this review is to unravel the charge transfer mechanisms after the in-depth analyses of already reported literature and establish the guidelines for future research.

Research of Knowledge Transfer Mechanisms and Environmental Uncertaint towards Renewable Energy in Thailand

2014 ◽  
Vol 522-524 ◽  
pp. 1850-1852
Author(s):  
Chun Wang Tsou ◽  
Pakarapong Supakarapongkul ◽  
Saksit Pornjirattikal ◽  
Yin Tsuo Huang
Keyword(s):  
Knowledge Transfer ◽  
Competitive Advantage ◽  
Environmental Uncertainty ◽  
Project Managers ◽  
Dynamic Capability ◽  
Future Research ◽  
Knowledge Transfers ◽  
Energy Companies ◽  
The Relationship ◽  
Transfer Mechanisms

This explanatory research explores the relationship among environmental uncertainty, knowledge transfers mechanisms, dynamic capability, and competitive advantage. A total of 235 project managers employed by energy companies in Thailand were invited to participate in the study. The findings indicated that (a) through knowledge transfer mechanisms, project teams could develop an energy enterprises core competence and build its competitive advantage, (b) the relationship between environmental uncertainty and knowledge transfer mechanisms is negative, and (c) dynamic capability and competitive advantage have a positive relationship. The limitations of the study regarding generalization, and recommendations for future research to replicate the study in other countries, are also included.

Orientation Specific Thermal Properties of Polyimide Film

2000 ◽  
Vol 123 (3) ◽  
pp. 273-277 ◽  
Author(s):  
Robert J. Samuels ◽  
Nancy E. Mathis
Keyword(s):  
Thermal Conductivity ◽  
Heat Dissipation ◽  
Polyimide Film ◽  
New Materials ◽  
Polyimide Films ◽  
Nondestructive Technique ◽  
Theoretical Understanding ◽  
First Time ◽  
The Relationship ◽  
Transfer Mechanisms

The present study examines the relationship between thermal conductivity and planarity in polyimide films. The samples tested were specially prepared to range in orientation from three dimensionally random to highly planar. The molecular structure and orientation of the polyimide film have been characterized by polarizing microscope techniques, while the thermal conductivity measurements were done using a new rapid nondestructive technique. This correlation represents the first time thermal conductivity has been measured by modified hot wire techniques and related to the internal structure of polyimide. This work contributes to a deeper theoretical understanding of thermal conductivity and heat transfer mechanisms as they relate to orientation. Thermal conductivity evaluation could provide a new tool in the arsenal of structural characterization techniques. This relationship between thermal conductivity and orientation is key for applications of directional heat dissipation in the passive layers of chip assemblies. Such a correlation has potential to speed the development cycles of new materials during formulation as well as assure properties during production.

Review on the Research of Dynamic Characteristics for Spacecraft Solar Arrays

2013 ◽  
Vol 584 ◽  
pp. 261-267
Author(s):  
Ze Hao Pan ◽  
Jia Ning Wu ◽  
Shao Ze Yan ◽  
Jie Liang Zhao
Keyword(s):  
Dynamic Characteristics ◽  
Damping Ratio ◽  
Solar Array ◽  
Future Research ◽  
New Materials ◽  
Thermally Induced ◽  
Solar Arrays ◽  
Research Areas ◽  
Multiple Dimensions ◽  
The Relationship

In this paper, a review of developments in the dynamic characteristics of traditional and inflatable solar array is presented. Three major aspects that affect the dynamic behavior of solar array are reviewed: component flexibility, joint clearance and thermally induced vibration. Important results and methods of exploring the dynamic characteristics of inflatable solar array are discussed. Future research areas in dynamic characteristics of solar array are identified as damping mechanism of inflatable structure, the relationship between pressurization level and damping ratio, application of more advanced contact model, dynamic characteristics of solar array made of new materials and consideration of deformation in multiple dimensions.

Leanness and agility: a comparative theoretical view

2017 ◽  
Vol 117 (1) ◽  
pp. 149-165 ◽  
Author(s):  
Nesrine Eltawy ◽  
David Gallear
Keyword(s):  
Systematic Review ◽  
Supply Chain ◽  
Supply Chains ◽  
Conceptual Framework ◽  
Deep Understanding ◽  
Future Research ◽  
Content Type ◽  
Comparative Review ◽  
Concept Review ◽  
The Relationship

Purpose The purpose of this paper is to compare and distinguish between two salient means for improving the management of, and leveraging the effectiveness of, supply chains. Leanness and agility have been considered recently as prominent and successful means for competing. The paper examines the literature on leanness and agility thinking including their definitions, importance and practices. The paper also highlights the argument surrounding the relationship direction between these two concepts. Design/methodology/approach A systematic comparative review was conducted on the lean literature and agility literature at three levels: manufacturing, organisation and supply chain. The systematic review on the lean concept has been conducted based on articles published over the last two decades. The agility concept review was conducted based on the articles published from its inception in 1991 through early 2016. Findings A conceptual framework is presented following the in-depth review. The conceptual framework sets out the input, operational practice and output elements necessary for both philosophies to take root successfully. A discussion based on the review of the literature on the direction of the relationship between leanness and agility is also presented, and should also be included in any future empirical testing of the conceptual framework. Research limitations/implications The paper is based on a systematic review which extends previous research as it has been conducted in a detailed and clear systematic manner which enables a deep understanding of the similarities and differences between leanness and agility philosophies from an operational perspective: inputs, operational and outcomes elements. Future research is required to empirically test the conceptual relationships. Practical implications Companies are constantly searching for ways to improve their supply chains. This paper seeks to provide a deep understanding for lean and agility philosophies as important means for achieving this goal. This has been conducted by clarifying the differences, similarities and the direction of the relationship that may exist between these two approaches as means for improving a company’s supply chain. Originality/value Based on a systematic review on leanness and agility philosophies, a conceptual framework exploring the differences and similarities between both philosophies from an operational systematic perspective is presented.

Symptoms of Alcohol Dependence Predict Suicide Ideation Among Alaskan Undergraduates

Crisis ◽  
2016 ◽  
Vol 37 (3) ◽  
pp. 232-235 ◽  
Author(s):  
Christopher R. DeCou ◽  
Monica C. Skewes
Keyword(s):  
Depressive Symptoms ◽  
Alcohol Consumption ◽  
Alcohol Dependence ◽  
Suicide Ideation ◽  
Alcohol Problems ◽  
Future Research ◽  
Causal Mechanism ◽  
Students At Risk ◽  
The Relationship ◽  
Alcohol Related Problems

Abstract. Background: Previous research has demonstrated an association between alcohol-related problems and suicidal ideation (SI). Aims: The present study evaluated, simultaneously, alcohol consequences and symptoms of alcohol dependence as predictors of SI after adjusting for depressive symptoms and alcohol consumption. Method: A sample of 298 Alaskan undergraduates completed survey measures, including the Young Adult Alcohol Consequences Questionnaire, the Short Alcohol Dependence Data Questionnaire, and the Beck Depression Inventory – II. The association between alcohol problems and SI status was evaluated using sequential logistic regression. Results: Symptoms of alcohol dependence (OR = 1.88, p < .05), but not alcohol-related consequences (OR = 1.01, p = .95), emerged as an independent predictor of SI status above and beyond depressive symptoms (OR = 2.39, p < .001) and alcohol consumption (OR = 1.08, p = .39). Conclusion: Alcohol dependence symptoms represented a unique risk for SI relative to alcohol-related consequences and alcohol consumption. Future research should examine the causal mechanism behind the relationship between alcohol dependence and suicidality among university students. Assessing the presence of dependence symptoms may improve the accuracy of identifying students at risk of SI.

The Relationship Between Interoception and Metacognition

2016 ◽  
Vol 30 (2) ◽  
pp. 76-86 ◽  
Author(s):  
Judith Meessen ◽  
Verena Mainz ◽  
Siegfried Gauggel ◽  
Eftychia Volz-Sidiropoulou ◽  
Stefan Sütterlin ◽  
...  
Keyword(s):  
Memory Performance ◽  
Memory Task ◽  
Demographic Characteristics ◽  
Metacognitive Awareness ◽  
Interoceptive Awareness ◽  
Future Research ◽  
Heartbeat Perception ◽  
Interoceptive Accuracy ◽  
The Relationship

Abstract. Recently, Garfinkel and Critchley (2013) proposed to distinguish between three facets of interoception: interoceptive sensibility, interoceptive accuracy, and interoceptive awareness. This pilot study investigated how these facets interrelate to each other and whether interoceptive awareness is related to the metacognitive awareness of memory performance. A sample of 24 healthy students completed a heartbeat perception task (HPT) and a memory task. Judgments of confidence were requested for each task. Participants filled in questionnaires assessing interoceptive sensibility, depression, anxiety, and socio-demographic characteristics. The three facets of interoception were found to be uncorrelated and interoceptive awareness was not related to metacognitive awareness of memory performance. Whereas memory performance was significantly related to metamemory awareness, interoceptive accuracy (HPT) and interoceptive awareness were not correlated. Results suggest that future research on interoception should assess all facets of interoception in order to capture the multifaceted quality of the construct.

The Relationship Between Leader–Member Exchange and Employees’ Proactive Behaviors

2019 ◽  
Vol 18 (2) ◽  
pp. 106-111
Author(s):  
Fong-Yi Lai ◽  
Szu-Chi Lu ◽  
Cheng-Chen Lin ◽  
Yu-Chin Lee
Keyword(s):  
Hierarchical Linear Modeling ◽  
Future Research ◽  
Leader Member Exchange ◽  
Voice Behavior ◽  
Linear Modeling ◽  
Team Members ◽  
Member Exchange ◽  
Multi Temporal ◽  
The Relationship ◽  
Practical Implications

Abstract. The present study proposed that, unlike prior leader–member exchange (LMX) research which often implicitly assumed that each leader develops equal-quality relationships with their supervisors (leader’s LMX; LLX), every leader develops different relationships with their supervisors and, in turn, receive different amounts of resources. Moreover, these differentiated relationships with superiors will influence how leader–member relationship quality affects team members’ voice and creativity. We adopted a multi-temporal (three wave) and multi-source (leaders and employees) research design. Hypotheses were tested on a sample of 227 bank employees working in 52 departments. Results of the hierarchical linear modeling (HLM) analysis showed that LLX moderates the relationship between LMX and team members’ voice behavior and creative performance. Strengths, limitations, practical implications, and directions for future research are discussed.

Coping Humor as a Mediator Between Emotional Intelligence and Job Satisfaction

2017 ◽  
Vol 16 (3) ◽  
pp. 155-159 ◽  
Author(s):  
Peizhen Sun ◽  
Jennifer J. Chen ◽  
Hongyan Jiang
Keyword(s):  
Job Satisfaction ◽  
Emotional Intelligence ◽  
Future Research ◽  
Satisfaction Scale ◽  
Primary School Teachers ◽  
Mediating Role ◽  
Regulation Of Emotion ◽  
The Relationship ◽  
Overall Job Satisfaction

Abstract. This study investigated the mediating role of coping humor in the relationship between emotional intelligence (EI) and job satisfaction. Participants were 398 primary school teachers in China, who completed the Wong Law Emotional Intelligence Scale, Coping Humor Scale, and Overall Job Satisfaction Scale. Results showed that coping humor was a significant mediator between EI and job satisfaction. A further examination revealed, however, that coping humor only mediated two sub-dimensions of EI (use of emotion and regulation of emotion) and job satisfaction. Implications for future research and limitations of the study are discussed.

Workplace Ostracism and Its Negative Outcomes

2016 ◽  
Vol 15 (4) ◽  
pp. 143-151 ◽  
Author(s):  
Xiaoming Zheng ◽  
Jun Yang ◽  
Hang-Yue Ngo ◽  
Xiao-Yu Liu ◽  
Wengjuan Jiao
Keyword(s):  
Affective Commitment ◽  
Psychological Capital ◽  
Intention To Leave ◽  
Future Research ◽  
Conservation Of Resources ◽  
Negative Consequences ◽  
Negative Outcomes ◽  
Workplace Ostracism ◽  
Using Data ◽  
The Relationship

Abstract. Workplace ostracism, conceived as to being ignored or excluded by others, has attracted the attention of researchers in recent years. One essential topic in this area is how to reduce or even eliminate the negative consequences of workplace ostracism. Based on conservation of resources (COR) theory, the current study assesses the relationship between workplace ostracism and its negative outcomes, as well as the moderating role played by psychological capital, using data collected from 256 employees in three companies in the northern part of China. The study yields two important findings: (1) workplace ostracism is positively related to intention to leave and (2) psychological capital moderates the effect of workplace ostracism on affective commitment and intention to leave. This paper concludes by discussing the implications of these findings for organizations and employees, along with recommendations for future research.

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