The resin-flowing model in prepreg lamination of print circuit board

Circuit World ◽  
2019 ◽  
Vol 45 (2) ◽  
pp. 86-92
Author(s):  
Shitao Liu ◽  
Rong Cui ◽  
Hongwei Cao ◽  
Jinhong Qiu
Keyword(s):  
Theoretical Model ◽  
Pressure Gradient ◽  
Print Circuit Board ◽  
Design Methodology ◽  
Darcy’S Law ◽  
Darcy's Law ◽  
Circuit Board ◽  
Content Type ◽  
Starvation Risk ◽  
Increased Pressure

Purpose This paper aims to show a resin-flowing model based on Darcy’s law to display the flowing properties of prepreg during lamination. The conformity between the model and experimental results demonstrates that it can provide a guideline on print circuit board (PCB) lamination. Design/methodology/approach Based on the theoretical derivations of Darcy’s law, this paper made an analysis on the flow of prepreg in the pressing process, according to which a theoretical model, namely, resin-flowing model was further formulated. Findings This paper establishes a resin-flowing model, according to which two experiment-verified conclusions can be drawn: first, the resin-flowing properties of material A and B can be improved when the heating rate is between 1.5 and 2.5 min/°C; second, increased pressure gradient can add the amount of flowing resin, mainly featured by increasing pressure and reducing filled thickness of prepreg. Originality/value This model provides guidance on setting lamination parameters for most kinds of prepregs and decreasing starvation risk for PCB production.

Robotic system design and development for automated dismantling of PCB waste

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ioan Doroftei ◽  
Daniel Chirita ◽  
Ciprian Stamate ◽  
Stelian Cazan ◽  
Carlos Pascal ◽  
...  
Keyword(s):  
Design Methodology ◽  
Printed Circuit Board ◽  
Vision System ◽  
Electronic Waste ◽  
Robotic System ◽  
Circuit Board ◽  
Short Introduction ◽  
Content Type ◽  
Printed Circuit ◽  
System A

Purpose The mass electronics sector is one of the most critical sources of waste, in terms of volume and content with dangerous effects on the environment. The purpose of this study is to provide an automated and accurate dismantling system that can improve the outcome of recycling. Design/methodology/approach Following a short introduction, the paper details the implementation layout and highlights the advantages of using a custom architecture for the automated dismantling of printed circuit board waste. Findings Currently, the amount of electronic waste is impressive while manual dismantling is a very common and non-efficient approach. Designing an automatic procedure that can be replicated, is one of the tasks for efficient electronic waste recovery. This paper proposes an automated dismantling system for the advanced recovery of particular waste materials from computer and telecommunications equipment. The automated dismantling architecture is built using a robotic system, a custom device and an eye-to-hand configuration for a stereo vision system. Originality/value The proposed approach is innovative because of its custom device design. The custom device is built using a programmable screwdriver combined with an innovative rotary dismantling tool. The dismantling torque can be tuned empirically.

scholarly journals A first-person theory of documentation

2019 ◽  
Vol 75 (1) ◽  
pp. 190-212 ◽  
Author(s):  
Tim Gorichanaz
Keyword(s):  
Theoretical Model ◽  
Design Methodology ◽  
Analytical Tool ◽  
First Person ◽  
Visual Artists ◽  
Art Making ◽  
Content Type ◽  
Person Perspective ◽  
Practical Implications ◽  
Person Experience

Purpose The purpose of this paper is to first articulate and then illustrate a descriptive theoretical model of documentation (i.e. document creation) suitable for analysis of the experiential, first-person perspective. Design/methodology/approach Three models of documentation in the literature are presented and synthesized into a new model. This model is then used to understand the findings from a phenomenology-of-practice study of the work of seven visual artists as they each created a self-portrait, understood here as a form of documentation. Findings A number of themes are found to express the first-person experience of art-making in these examples, including communicating, memories, reference materials, taking breaks and stepping back. The themes are discussed with an eye toward articulating what is shared and unique in these experiences. Finally, the themes are mapped successfully to the theoretical model. Research limitations/implications The study involved artists creating self-portraits, and further research will be required to determine if the thematic findings are unique to self-portraiture or apply as well to art-making, to documentation generally, etc. Still, the theoretical model developed here seems useful for analyzing documentation experiences. Practical implications As many activities and tasks in contemporary life can be conceptualized as documentation, this model provides a valuable analytical tool for better understanding those experiences. This can ground education and management decisions for those involved. Originality/value This paper makes conceptual and empirical contributions to document theory and the study of the information behavior of artists, particularly furthering discussions of information and document experience.

Individual unlearning, organizational unlearning and strategic flexibility

2019 ◽  
Vol 14 (1) ◽  
pp. 2-18 ◽  
Author(s):  
Xiangyang Wang ◽  
Ying Qi ◽  
Yingxin Zhao
Keyword(s):  
Theoretical Model ◽  
Survey Data ◽  
Design Methodology ◽  
Mediating Effect ◽  
Strategic Flexibility ◽  
Content Type ◽  
Positive Effects ◽  
The Relationship

PurposeThe purpose of this paper is to explore the relationship between unlearning and strategic flexibility from the down-up change perspective.Design/methodology/approachDrawing on the routine-updating process, this study builds a theoretical model and examines it using survey data from 233 firms in China.FindingsUnlearning is the enabler to strategic flexibility. Specifically, individual unlearning and organizational unlearning both have positive effects on strategic flexibility. Organizational unlearning exerts a partly mediating effect on the relationship between individual unlearning and strategic flexibility.Originality/valueThe paper examines the different mechanisms of individual and organizational unlearning on strategic flexibility and suggests that unlearning is a useful method or approach for strategic flexibility. In addition, this study is useful to help managers or practitioners determine how to embrace strategic flexibility by unlearning.

Inclusive leadership: new age leadership to foster organizational inclusion

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sunaina Chetan Kuknor ◽  
Shubhasheesh Bhattacharya
Keyword(s):  
Theoretical Model ◽  
Literature Review ◽  
Human Resources ◽  
Design Methodology ◽  
Human Resources Development ◽  
Inclusive Leadership ◽  
Content Type ◽  
Set Up ◽  
The Relationship ◽  
Practical Implications

Purpose This paper aims to investigate the relationship between inclusive leadership (IL) and organizational inclusion (OI) in literature and explores the contribution of IL and OI in human resources development (HRD). Design/methodology/approach The systematic literature review was undertaken from peer-reviewed journals. In total, 68 articles were critically analyzed to be included in the review highlighting the relationship between IL and OI. Findings The paper provides insights into leader behaviors that foster IL and how it differs from other styles of leadership. The paper also proposes a theoretical model to show the relationship between IL and OI. Practical implications The study will facilitate creating awareness in practitioners and academicians who think inclusion is mostly concerned with disabled learners, which is misleading. The paper will help the concerned stakeholders to formulate HRD practices to foster an inclusive culture at work. Originality/value The paper explores an area less researched and is among the few review papers investigating through the relationship between IL and OI and how they impact HRD practices in an organizational set-up.

How to develop spiritual awareness in the organization

2014 ◽  
Vol 33 (8/9) ◽  
pp. 871-890 ◽  
Author(s):  
Snehal Shah ◽  
Anil Sachdev
Keyword(s):  
Theoretical Model ◽  
Empirical Evidence ◽  
Potential Application ◽  
Design Methodology ◽  
Practical Wisdom ◽  
Content Type ◽  
Spiritual Awareness ◽  
Level Of Consciousness ◽  
Preliminary Support

Purpose – The purpose of this paper is to propose a theoretical model that leverages the practical wisdom of the Panch-Kosa framework of yogic philosophy to develop an awareness of spirituality in the organization. It also provides quasi-quantitative empirical evidence to demonstrate its potential application. Design/methodology/approach – A survey was designed and administered in four different organizations. Correlation, ANOVA and χ2 analysis were conducted to explore the applicability of the proposed framework. Findings – The results indicate that values, as reflected in the physical aspects of an organization such as its logo, symbols and organizational elements characterized as “practice of Fair Governance” and “HR Effectiveness”, influence employee-related outcomes. Further, the study found that when there is a perfect “alignment” between an organization's intent to honor values and its corresponding actions, employees perceive the highest levels of holistic engagement. Research limitations/implications – This study has an implication on how to leverage practical wisdom from Hindu philosophy to enable individuals and organizations to transform to a higher level of consciousness. Originality/value – The paper has ventured into an uncharted territory of integrating the yogic framework of Panch-Kosa to the organizational elements and has provided preliminary support for its applicability in organizations. Moreover, it operationalizes the notion of alignment between organization's value-centric strategy and actions and its impact on employee-related outcomes.

Do financial constraints moderate the relationship between innovation subsidies and firms' R&D investment?

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Enrique Acebo ◽  
José-Ángel Miguel-Dávila ◽  
Mariano Nieto
Keyword(s):  
Theoretical Model ◽  
Design Methodology ◽  
Financial Constraints ◽  
Point Of View ◽  
Economic Data ◽  
Content Type ◽  
Marginal Effects ◽  
The Relationship ◽  
D Investment ◽  
Innovation Policies

PurposeThe purpose of this paper is to analyse whether the effect of innovation subsidies on firms' R&D investment varies depending on whether the firm is suffering from financial constraints.Design/methodology/approachTo address this analysis, the authors provide a theoretical model and test their hypothesis using an econometric analysis of an unbalanced panel of 3,865 innovative Spanish firms during 2010–2017. They employ the SABI database to obtain firms' financial and economic data and incorporate firms' MORE financial rating. Specifically, the authors use the GMM-SYS technique to regress and measure the marginal effects of innovation subsidies size on firms' R&D investment and the influence of firms' financial constraints.FindingsThe results of this work indicate that financial constraints negatively moderate the effect of subsidies on R&D investment; that is, those firms that receive a subsidy and suffer financial constraints invest less in R&D projects than those which also receive the subsidy and do not suffer financial constraints. Besides, this work found that innovation subsidies alone do not significantly increase firms' R&D investment.Originality/valueFrom a neoclassical point of view, the existence of financial constraints is the justification of public innovation policies. However, due to the difficulty of measuring financial constraints, innovation literature has abandoned the analysis of this crucial variable. This work reintroduces this vital variable and analyses how it interacts with innovation subsidies on firms' R&D investment.

Helping coworkers only when I have more? Integrating social comparison, attribution and conservation of resources theories

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shih Yung Chou ◽  
Katelin Barron ◽  
Charles Ramser
Keyword(s):  
Theoretical Model ◽  
Social Comparison ◽  
Design Methodology ◽  
Helping Behavior ◽  
Personal Resources ◽  
Conservation Of Resources ◽  
Content Type ◽  
Managerial Implications ◽  
Attribution Theories ◽  
Comparative Nature

Purpose Drawing upon conservation of resources (COR) and attribution theories, prior research in helping behavior has mainly focused on an independent view of the helper’s personal resources. This perspective, however, falls short of capturing the comparative nature of personal resources and attributions in a helping context. The purpose of this paper is, therefore, to develop a theoretical model that helps predict employees’ decisions to help or not to help. Design/methodology/approach A theoretical model was developed by integrating social comparison, COR and attribution theories. Findings The theoretical model proposes the following. First, when employees perceive that they have fewer personal resources than a coworker who needs help, they are less likely to help. Second, when employees perceive that they have more personal resources than a coworker who needs help, they make causal attributions as to why the coworker failed to deploy personal resources. Finally, when employees have more personal resources than a coworker who needs help, they are more likely to help if they make situational, unstable and uncontrollable attributions to the coworker’s failure to deploy personal resources. Originality/value This paper extends the literature by offering a theoretical model that emphasizes comparisons and attributions of personal resources in a helping context. Additionally, this paper offers several managerial implications that help managers manage helping behavior effectively.

A response to Kreiger and Zhovtobryukh

2014 ◽  
Vol 7 (2) ◽  
pp. 106-108
Author(s):  
Andre L. Delbecq
Keyword(s):  
Theoretical Model ◽  
North American ◽  
Design Methodology ◽  
Strategic Leadership ◽  
International Survey ◽  
Health Organizations ◽  
Content Type ◽  
Dynamic Leadership ◽  
Published Paper

Purpose – The purpose of this paper is to provide a brief response to Mark Kriger, Yuriy Zhovtobryukh, (2013) “Rethinking strategic leadership: stars, clans, teams and networks”, Journal of Strategy and Management, Vol. 6 No. 4, pp. 411-432. Design/methodology/approach – This paper provides a response to a previously published paper “Rethinking strategic leadership: stars, clans, teams and networks”, Journal of Strategy and Management, Vol. 6 No. 4, pp. 411-432 and illustrates the implications for leadership evolution in North American health organizations. Findings – In Mark Kriger, Yuriy Zhovtobryukh, (2013) “Rethinking strategic leadership: stars, clans, teams and networks”, Journal of Strategy and Management, Vol. 6 No. 4, pp. 411-432 the authors provide a theoretical model of contemporary leadership suggesting an evolution from “Single Actor Leadership” toward “Dynamic Leadership Networks.” This response to the paper illustrates how their conceptualization serves as a rich observational prism for understanding leadership evolution within North American healthcare organizations.Summative echoes are also observed in an international survey of leaders reported by the IBM foundation. These deductive and illustrative observations reinforce the salience of Kreiger and Zhovtobryukh model's as a timely conceptual lens for scholarly efforts seeking to explore contemporary leadership. Originality/value – Highlights how the aforementioned paper provides a conceptual lens through which to explore contemporary leadership in a scholarly context.

Consumers’ intention to donate to two children’s charity brands: a comparison of Barnardo’s and BBC Children in Need

2015 ◽  
Vol 24 (2) ◽  
pp. 134-146 ◽  
Author(s):  
Nina Michaelidou ◽  
Milena Micevski ◽  
Nikoletta Theofania Siamagka
Keyword(s):  
Theoretical Model ◽  
Design Methodology ◽  
Brand Image ◽  
The Other ◽  
Content Type ◽  
Non Profit ◽  
Income Levels ◽  
For Profit ◽  
Consumer Intentions ◽  
The Impact

Purpose – This paper aims to examine consumers’ non-profit brand image, brand typicality and past behaviour as determinants of intention to donate to two children charity brands. Design/methodology/approach – Data for this study were obtained from two separate studies via a questionnaire, both in the context of two children charities, one for Barnardo’s and the other for BBC Children in Need charity. A theoretical model is developed, tested and compared across the two charity brands. Findings – Findings highlight that different factors influence intentions to donate time and money according to the charity brand. Brand typicality is a key determinant of time donations, while the impact of non-profit brand image dimensions on time and money donations differs across the two charities. Past behaviour affects intentions to donate money in both charities but impacts time donations in only one of the two charities investigated. Research limitations/implications – The study examines specific dimensions of non-profit brand image across two different charity brands and offers theoretical insights about the value of brand image in a non-for profit context in shaping consumer outcomes (i.e. consumer intentions to donate). Originality/value – The study sheds further light into the notion of typicality put forward by Michel and Rieunier (2012) for two children’s charity brands that differ in terms of their strength and income levels and examined past behaviour as a determinant to donate to charity brands.

scholarly journals Friend and foe? Self-deception in organisations

2019 ◽  
Vol 38 (2) ◽  
pp. 130-140
Author(s):  
Joana Kuntz ◽  
Erlend Dehlin
Keyword(s):  
Theoretical Model ◽  
Design Methodology ◽  
Critical Reflection ◽  
Well Being ◽  
System Justification ◽  
Organisational Development ◽  
Content Type ◽  
Embedded Model ◽  
Relational Factors ◽  
Psychological Mechanism

Purpose Self-deception is generally deemed an adaptive psychological mechanism that ensures well-being, a sense of identity and social advancement. However, self-deception becomes maladaptive in organised environments that undermine the critical thinking essential to development and change. The purpose of this paper is to advance a theoretical model of self-deception, specifying and contextualising its intrapersonal and relational components in organisations. Further, it provides guidelines for practitioners to identify self-deception tactics, and minimise maladaptive self-deception. Design/methodology/approach Drawing on affective coping, system justification and self-categorisation theories, the paper illustrates how the interplay of intrapersonal and relational factors with organisational practices explain self-deception. Findings Maladaptive self-deception is pervasive in organisations that deter critical reflection, and intensify motivated biases to self-enhance and self-protect. Originality/value This paper proposes a socially and organisationally embedded model of self-deception, specifies how self-deception develops and manifests in organisations, and suggests ways of identifying and managing self-deception towards positive organisational development and change.

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