Buckling behavior of cold-formed C/Z-section purlins incorporating the effects of diaphragm and the screw location

2019 ◽  
Vol 23 (6) ◽  
pp. 1114-1128
Author(s):  
Na Yang ◽  
Fan Bai
Keyword(s):  
Mechanical Performance ◽  
Buckling Load ◽  
Biaxial Bending ◽  
Distortional Buckling ◽  
Limit States ◽  
Buckling Behavior ◽  
Proposed Model ◽  
Flexural Torsional Buckling ◽  
The Impact ◽  
The Relationship

This article presents a study on the impact of the screw location and the diaphragm effects on the buckling behavior of the simply supported C/Z-section purlins under wind uplift loadings. The diaphragm effects provided by the sheeting and the warping-torsional effect induced by load eccentricity are taken into account in the differential equations of the nonlinear twisting flexural-torsional model. The biaxial bending moments, bi-moments, as well as the flexural-torsional buckling load of the purlin can be numerically obtained with the proposed model. The global, local, and distortional buckling interaction behavior and the limit states capacities are formulated based on the modified Direct Strength Method. The effects of both the restraints provided by the sheeting and impact of the screw location on the mechanical performance of the purlins are evaluated with the proposed method. The relationship between the buckling load and rotational restraint stiffness is also provided. The proposed methodology will contribute to the assessment of buckling capacity of purlin-sheeting systems.

scholarly journals Review of the relationship between aggregates geology and Los Angeles and micro-Deval tests

2021 ◽  
Vol 80 (3) ◽  
pp. 1963-1980
Author(s):  
Solomon Adomako ◽  
Christian John Engelsen ◽  
Rein Terje Thorstensen ◽  
Diego Maria Barbieri
Keyword(s):  
Los Angeles ◽  
Crystal Size ◽  
Grain Shape ◽  
Mechanical Performance ◽  
Pore Space ◽  
Construction Material ◽  
Engineering Properties ◽  
Coarse Grained ◽  
The Impact ◽  
The Relationship

AbstractRock aggregates constitute the enormous volume of inert construction material used around the globe. The petrologic description as igneous, sedimentary, and metamorphic types establishes the intrinsic formation pattern of the parent rock. The engineering properties of these rocks vary due to the differences in the transformation process (e.g. hydrothermal deposits) and weathering effect. The two most common mechanical tests used to investigate the performance of aggregates are the Los Angeles (LA) and micro-Deval (MD) tests. This study reviewed the geological parameters (including mineralogy, grain and crystal size, grain shape, and porosity) and the relationship to Los Angeles and micro-Deval tests. It was found that high content of primary minerals in rocks (e.g. quartz and feldspar) is a significant parameter for performance evaluation. Traces of secondary and accessory minerals also affect the performance of rocks, although in many cases it is based on the percentage. Furthermore, some studies showed that the effect of mineralogic composition on mechanical strength is not sufficient to draw final conclusions of mechanical performance; therefore, the impact of other textural characteristics should be considered. The disposition of grain size and crystal size (e.g. as result of lithification) showed that rocks composed of fine-grain textural composition of ≤ 1 mm enhanced fragmentation and wear resistance than medium and coarse grained (≥ 1 mm). The effect of grain shape was based on convex and concave shapes and flat and elongated apexes of tested samples. The equidimensional form descriptor of rocks somehow improved resistance to impact from LA than highly flat and elongated particles. Lastly, the distribution of pore space investigated by means of the saturation method mostly showed moderate (R = 0.50) to strong (R = 0.90) and positive correlations to LA and MD tests.

The Impact of Defense Investment on Economic Growth in the Perspective of Time Series

2014 ◽  
Vol 5 (4) ◽  
pp. 44-58
Author(s):  
Bin Pan ◽  
Shih-Yung Wei ◽  
Xuanhua Xu ◽  
Wei-Chiang Hong
Keyword(s):  
Economic Growth ◽  
Growth Rate ◽  
Private Investment ◽  
Investment Risk ◽  
Demand And Supply ◽  
Economic Growth Rate ◽  
Proposed Model ◽  
Endogenous Growth Model ◽  
The Impact ◽  
The Relationship

By considering the demand and supply effects of defense investment and the uncertainty of the stochastic process of the production and defense investment, this study proposes a stochastic endogenous growth model to explore the impact of defense investment on economic growth. The results suggest that the relationship between defense investment and economic growth rate is nonlinear and obtains the optimal percentage of defense investment to maximize economic growth. Moreover, the impact of defense investment volatility on economic growth rate is subject to production and defense investment interference term's covariance and representative private investment risk preference. Finally, the empirical data are used to illustrate the applicability of the proposed model.

scholarly journals Follower emotional intelligence

2019 ◽  
Vol 48 (5) ◽  
pp. 1239-1260
Author(s):  
J. Irudhaya Rajesh ◽  
Verma Prikshat ◽  
Paul Shum ◽  
L. Suganthi
Keyword(s):  
Emotional Intelligence ◽  
Structural Equation ◽  
Theoretical Perspective ◽  
Self Report ◽  
Content Type ◽  
Proposed Model ◽  
One Step ◽  
Cognitive Speed ◽  
The Impact ◽  
The Relationship

Purpose The purpose of this paper is to understand the impact of transformational leadership (TL) on follower emotional intelligence (EI) and examine the potential mediation role played by follower EI in the relationship between TL and follower outcomes (i.e. growth satisfaction in the job and job stress (JS)). Design/methodology/approach Data were obtained through survey using questionnaire collected from 908 employees who worked across six different sectors, i.e. manufacturing, IT, healthcare, hospitality, educational and public services in Southern India. The mediation model proposed in this study was tested using structural equation modelling and bootstrapping method. Findings The relationship between TL and Follower EI was significant. Follower EI was found to partially mediate the relationship between TL and followers’ growth satisfaction in job. Contrary to expectations, the follower EI did not significantly predict JS in this study and hence the follower EI did not mediate in the proposed model. However, follower EI and growth satisfaction in the job jointly mediated the relationship between TL and follower JS fully. Research limitations/implications Self-report bias about supervisors’ TL behaviours and followers’ own EI assessment and collection of data from the mono-source (subordinate self-report) might have impacted the results of this study. Moreover, some items were negatively worded and reverse coded as cognitive speed bumps to restrain the respondent’s tendency to rush through answering the survey questionnaire. Practical implications This study established a partial and joint mediation of follower EI on the relationship between TL and follower outcomes. Basing on these findings, this study highlights the need for the practitioners to better understand the importance of EI training for the leaders in the organisations for obtaining better outcomes in the followers. Social implications The study establishes the fact that the attunement of transformational leaders’ EI and follower EI help leaders as well as followers to guide their behaviour towards positive outcomes. Originality/value This study is among the first to examine the impact of TL on follower EI and the potential mediation of follower EI between TL and follower outcomes. From a theoretical perspective, this study is one step closer to fully understand the intervening process between TL and follower outcomes.

scholarly journals The impact of organizational culture on innovation for the development of tourism SMEs in the municipality of Caborca, Sonora

2019 ◽  
pp. 1-11
Author(s):  
Javier Saucedo-Monarque ◽  
Oscar Ernesto Hernández-Ponce ◽  
Luis Enrique Valdez-Juárez
Keyword(s):  
Organizational Culture ◽  
Explanatory Power ◽  
Measurement Instrument ◽  
Logit Analysis ◽  
Chi Square ◽  
Proposed Model ◽  
Independent Variable ◽  
The Impact ◽  
The Relationship ◽  
Structured Questionnaire

The results presented in this study related the factor of organizational culture with innovation for the development of small tourist businesses (SMEs) in the municipality of Caborca, Sonora. For which an exploratory analysis of the model, was made to subsequently analyze the Association of variables through the model of the Chi-square and thus be able to check the predictive and explanatory power of the same by means of Probit and Logit analysis. The collection of data was used as measurement instrument a structured questionnaire was administered to managers or entrepreneurs of tourism SMEs in the municipality of Caborca, Sonora. Where was the reliability of the instrument for measuring, the R² and significance of the model Chi square statistical analysis was used to identify the relationship and association between the variables of the proposed model, obtaining the coefficient Gamma with a strong correlation between the variables, as well as Gamma, Probit and Logit values, acceptable values for the relationship between the dependent variable and the independent variable was observed. A higher rate and robustness of prediction of the variables with acceptable significance was also obtained.

scholarly journals The impact of Supervisor Support towards Extra-Role Behavior

2019 ◽  
Vol 8 (4) ◽  
pp. 5109-5113
Keyword(s):  
Organizational Climate ◽  
Supervisor Support ◽  
Model Analysis ◽  
Instrumental Support ◽  
Employee Outcomes ◽  
Role Behavior ◽  
Proposed Model ◽  
The Impact ◽  
The Relationship

Effective supervisor support consists of two main features: emotional and instrumental support. Recent studies from the perspective of organizational climate which focus on the execution of such features among supervisors has a significant impact towards positive employee outcomes especially in their extra-role behavior. Even though this relationship has been widely explored, the role of supervisor support as a vital construct is still less discussed in the organizational climate literature. Therefore, this research was conduct to investigate the relationship between supervisor support and extra-role behavior. The data was collected using survey on 113 executives and non-executives from a telecommunication organization. The findings from the SmartPLS model analysis revealed that, extra-role behavior contributed to 31% variance on the proposed model. This shows that the ability of supervisors to provide emotional and instrumental support to employees has led to an increase in their extra-role behavior in the organization. The implications of this study in relation to theories, methodologies and organizational practitioners are also discussed.

scholarly journals Multi-lane Changing Model with Coupling Driving Intention and Inclination

2017 ◽  
Vol 29 (2) ◽  
pp. 185-192 ◽  
Author(s):  
Jiangfeng Wang ◽  
Chang Gao ◽  
Zhouyuan Zhu ◽  
Xuedong Yan
Keyword(s):  
Risk Factor ◽  
Lane Changing ◽  
Traffic Demand ◽  
Average Speed ◽  
Slowing Down ◽  
Behavioural Characteristics ◽  
Proposed Model ◽  
Density Flow ◽  
The Impact ◽  
The Relationship

Considering the impact of drivers’ psychology and behaviour, a multi-lane changing model coupling driving intention and inclination is proposed by introducing two quantitative indices of intention: strength of lane changing and risk factor. According to the psychological and behavioural characteristics of aggressive drivers and conservative drivers, the safety conditions for lane changing are designed respectively. The numerical simulations show that the proposed model is suitable for describing the traffic flow with frequent lane changing, which is more consistent with the driving behaviour of drivers in China. Compared with symmetric two-lane cellular automata (STCA) model, the proposed model can improve the average speed of vehicles by 1.04% under different traffic demands when aggressive drivers are in a higher proportion (the threshold of risk factor is 0.4). When the risk factor increases, the average speed shows the polarization phenomenon with the average speed slowing down in big traffic demand. The proposed model can reflect the relationship among density, flow, and speed, and the risk factor has a significant impact on density and flow.

The impact of entertainment and social interaction with salespeople on mall shopper satisfaction

2019 ◽  
Vol 47 (2) ◽  
pp. 94-110 ◽  
Author(s):  
Maher Georges Elmashhara ◽  
Ana Maria Soares
Keyword(s):  
Social Interaction ◽  
Emotional States ◽  
Content Type ◽  
Mediating Role ◽  
Proposed Model ◽  
The Social ◽  
Shopping Experience ◽  
The Impact ◽  
The Relationship ◽  
Practical Implications

Purpose The purpose of this paper is to understand the role played by emotional states in the relationship between entertainment and social interaction with salespeople and shopper satisfaction. Design/methodology/approach The proposed model was tested using a survey-based study, with a sample size of 318 mall shoppers. Findings The results indicate that pleasure and dominance are mediators in the relationship between entertainment and social interaction with salespeople and mall shopper satisfaction. Moreover, regarding the direct relations, entertainment directly influences satisfaction, while social interaction does not. Practical implications The results have practical implications for mall managers and mall developers. Specifically, entertainment can be used to attract shoppers and to enhance their satisfaction with the overall shopping experience. Practical suggestions to this end are offered. Originality/value This study’s contribution is twofold: first, this study adds to research by addressing the gap in research regarding shopper emotional states. Specifically, it addresses the mediating role played by emotional states of shoppers on the impact of entertainment and social interaction in satisfaction. Second, the study concentrates on the role of salespeople by focusing on the social aspects of the interaction.

Examining the Impact of Web 2.0 Applications on Knowledge Management Performance

2016 ◽  
pp. 1257-1277
Author(s):  
Scott Buechler ◽  
Richard Hartshorne ◽  
Haya Ajjan
Keyword(s):  
Knowledge Management ◽  
Web 2.0 ◽  
Knowledge Workers ◽  
Internal Communication ◽  
Management Performance ◽  
Proposed Model ◽  
Managerial Implications ◽  
Pls Analysis ◽  
The Impact ◽  
The Relationship

There has been an increasing interest in the use of Web 2.0 applications to enhance the effectiveness of internal communication and improve knowledge management within the organization. However, extant Web 2.0 research has focused on the implementation, adaption patterns, and benefits, and little has been done to empirically examine the determinants of continuance use of Web 2.0 within the organization and its impact on knowledge performance. The objective of this study is to empirically examine the impact of both hedonic and utilitarian performance on the intention of knowledge workers to continue to use Web 2.0 applications within an organization, and then investigate the influence of the continuance use decision on knowledge management performance. The proposed model is tested using a survey of knowledge workers using Web 2.0 applications in their organizations. The results of the PLS analysis empirically validate the relationship between antecedents, continuance use, and knowledge management performance. Research and managerial implications of our findings are presented.

Examining the Impact of Web 2.0 Applications on Knowledge Management Performance

2014 ◽  
pp. 90-110
Author(s):  
Scott Buechler ◽  
Richard Hartshorne ◽  
Haya Ajjan
Keyword(s):  
Knowledge Management ◽  
Web 2.0 ◽  
Knowledge Workers ◽  
Internal Communication ◽  
Management Performance ◽  
Proposed Model ◽  
Managerial Implications ◽  
Pls Analysis ◽  
The Impact ◽  
The Relationship

There has been an increasing interest in the use of Web 2.0 applications to enhance the effectiveness of internal communication and improve knowledge management within the organization. However, extant Web 2.0 research has focused on the implementation, adaption patterns, and benefits, and little has been done to empirically examine the determinants of continuance use of Web 2.0 within the organization and its impact on knowledge performance. The objective of this study is to empirically examine the impact of both hedonic and utilitarian performance on the intention of knowledge workers to continue to use Web 2.0 applications within an organization, and then investigate the influence of the continuance use decision on knowledge management performance. The proposed model is tested using a survey of knowledge workers using Web 2.0 applications in their organizations. The results of the PLS analysis empirically validate the relationship between antecedents, continuance use, and knowledge management performance. Research and managerial implications of our findings are presented.

Impact of Employer Branding on Employee Engagement in BPO Sector in India With the Mediating Effect of Person-Organisation Fit

2020 ◽  
Vol 11 (3) ◽  
pp. 59-73
Author(s):  
Poonam Chawla
Keyword(s):  
Employee Engagement ◽  
Global Economy ◽  
Structural Equation ◽  
Mediating Effect ◽  
Employer Branding ◽  
Comprehensive Strategy ◽  
Proposed Model ◽  
Value Propositions ◽  
The Impact ◽  
The Relationship

With human capital emerging as a sustainable source of strategic advantage organisations are focusing on developing employee value propositions which consistently engage their workforce so that they can proactively contribute towards the achievement of organisational goals. This research investigates the impact of employer branding strategy (a mechanism used by organisations to engage competent talent) on employee engagement whilst simultaneously measuring the mediating effect of person-organization (P-O) fit. The study analyses a sample of 296 employees working in the BPO sector (offshore call centres) in India. The proposed model is tested with the help of structural equation modelling. The findings of the research highlight that employer branding has an affirmative relationship with P-O fit and employee engagement. The findings also reveal that P-O effect has a partial mediating effect on the relationship between employer branding and employee engagement. It can be deduced that employer branding is a comprehensive strategy which can be used by employers to engage employees. Thus, in a global economy where a talented workforce is scarce and has plenty of choices available to them, firms can use employer branding as a strategic opportunity to enhance employee engagement.

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