Interaction of laser beams with carbon textile materials

2015 ◽  
Vol 27 (5) ◽  
pp. 720-737
Author(s):  
Milesa Ž Sreckovic ◽  
Branka Kaludjerovic ◽  
Aleksander G Kovacevic ◽  
Aleksandar Bugarinovic ◽  
Dragan Družijanic
Keyword(s):  
Textile Industry ◽  
Laser Beams ◽  
Future Research ◽  
Process Conditions ◽  
Laser Applications ◽  
Content Type ◽  
Textile Materials ◽  
Different Types ◽  
Fs Laser ◽  
Fabric Materials

Purpose – The purpose of this paper is to present the results of interaction occurring during the exposition of some specific carbon textile materials obtained in laboratory conditions to beams of various laser types. Design/methodology/approach – Carbon fabric materials – fiber, felt and cloth – obtained from different precursor materials and prepared at various process conditions (oxidized, partially carbonized, carbonized, graphitized), were exposed to pulses of various lasers (Nd3+: YAG, alexandrite, ruby). Findings – Depending on the laser power, plasma and destructive phenomena occurred. In the case of an interaction between a Nd3+: YAG laser beam and specimens of thickness in millimeter range, the authors have estimated the threshold of the energy density for drilling and discussed the possible models of the interaction. Research limitations/implications – The results have implications in the estimations of quality as well as in the improvement of material processing, giving some new light to the changes of mechanical and optical constants of the material, as well as to the changes of carbon groups of the material, which would be useful for different types of modeling. Future research will be in the interaction of laser beams with various textile materials, where the investigation would cover the microstructure changes and the implications on cloth cutting and welding, concerning the damages as well as relief structures, specially renew for fs laser regimes. Originality/value – The area of laser applications in the textile industry is supported by scientific and applicative exploration. However, fewer results are concerned with deep introspection into the microstructure of the damages considering the laser interaction with carbon fiber and other carbon-based textiles.

scholarly journals Advantages and potential challenges of data management in e-maintenance

2019 ◽  
Vol 25 (3) ◽  
pp. 378-396 ◽  
Author(s):  
Arian Razmi-Farooji ◽  
Hanna Kropsu-Vehkaperä ◽  
Janne Härkönen ◽  
Harri Haapasalo
Keyword(s):  
Data Management ◽  
Design Methodology ◽  
Management Practices ◽  
Future Research ◽  
Conceptual Approach ◽  
Content Type ◽  
Different Types ◽  
Maintenance Systems ◽  
Industry Leader ◽  
Practical Implications

Purpose The purpose of this paper is twofold: first, to understand data management challenges in e-maintenance systems from a holistically viewpoint through summarizing the earlier scattered research in the field, and second, to present a conceptual approach for addressing these challenges in practice. Design/methodology/approach The study is realized as a combination of a literature review and by the means of analyzing the practices on an industry leader in manufacturing and maintenance services. Findings This research provides a general understanding over data management challenges in e-maintenance and summarizes their associated proposed solutions. In addition, this paper lists and exemplifies different types and sources of data which can be collected in e-maintenance, across different organizational levels. Analyzing the data management practices of an e-maintenance industry leader provides a conceptual approach to address identified challenges in practice. Research limitations/implications Since this paper is based on studying the practices of a single company, it might be limited to generalize the results. Future research topics can focus on each of mentioned data management challenges and also validate the applicability of presented model in other companies and industries. Practical implications Understanding the e-maintenance-related challenges helps maintenance managers and other involved stakeholders in e-maintenance systems to better solve the challenges. Originality/value The so-far literature on e-maintenance has been studied with narrow focus to data and data management in e-maintenance appears as one of the less studied topics in the literature. This research paper contributes to e-maintenance by highlighting the deficiencies of the discussion surrounding the perspectives of data management in e-maintenance by studying all common data management challenges and listing different types of data which need to be acquired in e-maintenance systems.

Accessing resources for service innovation – the critical role of network relationships

2014 ◽  
Vol 25 (1) ◽  
pp. 2-29 ◽  
Author(s):  
Helena Rusanen ◽  
Aino Halinen ◽  
Elina Jaakkola
Keyword(s):  
Critical Role ◽  
Service Innovation ◽  
Innovation Process ◽  
Research Strategy ◽  
Future Research ◽  
Theoretical Understanding ◽  
Resource Access ◽  
Content Type ◽  
External Resources ◽  
Different Types

Purpose – This paper aims to explore how companies access resources through network relationships when developing service innovations. The paper identifies the types of resource that companies seek from other actors and examines the nature of relationships and resource access strategies that can be applied to access each type of resource. Design/methodology/approach – A longitudinal, multi-case study is conducted in the field of technical business-to-business (b-to-b) services. An abductive research strategy is applied to create a new theoretical understanding of resource access. Findings – Companies seek a range of resources through different types of network relationships for service innovation. Four types of resource access strategies were identified: absorption, acquisition, sharing, and co-creation. The findings show how easily transferable resources can be accessed through weak relationships and low-intensity collaboration. Access to resources that are difficult to transfer, instead, necessitates strong relationships and high-intensity collaboration. Research limitations/implications – The findings are valid for technical b-to-b services, but should also be tested for other kinds of innovations. Future research should also study how actors integrate the resources gained through networks in the innovation process. Practical implications – Managers should note that key resources for service innovation may be accessible through a variety of actors and relationships ranging from formal arrangements to miscellaneous social contacts. To make use of tacit resources such as knowledge, firms need to engage in intensive collaboration. Originality/value – Despite attention paid to network relationships, innovation collaboration, and external resources, previous research has neither linked these issues nor studied their mutual contingencies. This paper provides a theoretical model that characterizes the service innovation resources accessible through different types of relationships and access strategies.

Assessment of flight dynamic and static aeroelastic behaviors for jet transport aircraft subjected to instantaneous high g-loads

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yonghu Wang ◽  
Ray C. Chang ◽  
Wei Jiang
Keyword(s):  
Numerical Approach ◽  
Future Research ◽  
Inspection Method ◽  
Content Type ◽  
Flight Data ◽  
Transport Aircraft ◽  
Different Types ◽  
Static Aeroelasticity ◽  
Safety Operation ◽  
Structural Inspection

Purpose The purpose of this paper is to present a quick inspection method based on the post-flight data to examine static aeroelastic behavior for transport aircraft subjected to instantaneous high g-loads. Design/methodology/approach In the present study, the numerical approach of static aeroelasticity and two verified cases will be presented. The non-linear unsteady aerodynamic models are established through flight data mining and the fuzzy-logic modeling of artificial intelligence techniques based on post-flight data. The first and second derivatives of flight dynamic and static aeroelastic behaviors, respectively, are then estimated by using these aerodynamic models. Findings The flight dynamic and static aeroelastic behaviors with instantaneous high g-load for the two transports will be analyzed and make a comparison study. The circumstance of turbulence encounter of the new twin-jet is much serious than that of four-jet transport aircraft, but the characteristic of stability and controllability for the new twin-jet is better than those of the four-jet transport aircraft; the new twin-jet transport is also shown to have very small aeroelastic effects. The static aeroelastic behaviors for the two different types can be assessed by using this method. Practical implications As the present study uses the flight data stored in a quick access recorder, an intrusive structural inspection of the post-flight can be avoided. A tentative conclusion is to prove that this method can be adapted to examine the static aeroelastic effects for transport aircraft of different weights, different sizes and different service years in tracking static aeroelastic behavior of existing different types of aircraft. In future research, one can consider to have more issues of other types of aircraft with high composite structure weight. Originality/value This method can be used to assist airlines to monitor the variations of flight dynamic and static aeroelastic behaviors as a complementary tool for management to improve aviation safety, operation and operational efficiency.

scholarly journals Co-creation of services: an online network perspective

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Reihaneh Bidar ◽  
Alistair Barros ◽  
Jason Watson
Keyword(s):  
Future Research ◽  
Structured Interviews ◽  
Final Model ◽  
Content Type ◽  
Creation Process ◽  
Online Networks ◽  
Environmental Stimuli ◽  
Value Perception ◽  
Value Perceptions ◽  
Different Types

PurposeIn the co-creation process from a network perspective, service is produced, designed, and evaluated entirely by the actors with dynamic roles and with less participation by the firm's employees in the service process. The purpose of this paper is to develop a theoretical model that represents environmental stimuli and value perceptions that contribute to service co-creation behaviour in an online network.Design/methodology/approachA total of 36 semi-structured interviews were conducted with members of two online programming communities – GitHub and Stack Overflow co-creators, with the data analysed using thematic analysis. The stimulus-organism-response model guided the development of the final model.FindingsSocial influence and trust are influential in actor value perceptions, including primary and network value, the interplay of which leads actors to co-production, supportive, and administrative behaviour. Environmental factors do not directly drive actors; rather it is the value that initiates and drives actors, which, by extension, initiates and drives the co-creation of services.Research limitations/implicationsThe service co-creation behaviour model provides a basis for future research in the co-creation and co-destruction context to model behaviours within the online network organisation setting and thereby enable improvement of such systems. This model can be operationalised in a network environment through design features.Originality/valueThis paper provides a rich understanding of environmental stimuli and value perception factors that contribute to the co-creation of services, and identifies different types of behaviours in dynamic online networks. This paper presents a new model of different types of behaviours emerging from actor participation in the co-creation process.

Trust, risk and transaction intention in consumer-to-consumer e-marketplaces

2019 ◽  
Vol 119 (2) ◽  
pp. 331-350 ◽  
Author(s):  
Kangning Wei ◽  
Yuzhu Li ◽  
Yong Zha ◽  
Jing Ma
Keyword(s):  
Qualitative Study ◽  
Perceived Risk ◽  
Design Methodology ◽  
Future Research ◽  
Trust Building ◽  
Content Type ◽  
Online Transactions ◽  
Starting Point ◽  
Different Types ◽  
Practical Implications

Purpose The purpose of this paper is to compare the relative impacts of trust and risk on individual’s transaction intention in consumer-to-consumer (C2C) e-marketplaces from both the buyers’ and the sellers’ perspectives. Design/methodology/approach Two surveys were used to collect data regarding buyers’ and sellers’ perceptions and transaction intentions at a typical C2C e-marketplace. Partial least squares was used to analyze the data. A complementary qualitative study was conducted to triangulate the results from the quantitative study. Findings Institution-based trust (IBT) exerts a stronger influence on transaction intentions for buyers than for sellers. Sellers perceive a stronger impact of trust in intermediary (TII) than buyers on transaction intentions. The impacts of perceived risk in transactions are not different between buyers and sellers. Furthermore, IBT mediates the impacts of TII and perceived risk on transaction intentions for buyers. Research limitations/implications The results indicate that the impacts of trust and risk on transaction intention in e-marketplaces do differ between buyers and sellers. This suggests a need to further investigate the buyer–seller difference in online transactions. Practical implications Intermediaries need to focus on different types of trust-building mechanisms when attracting buyers and sellers to make transactions in the e-marketplace. Originality/value C2C e-marketplaces cannot survive without participation from both buyers and sellers. Most prior research is conducted from the buyers’ perspective. This research sets a starting point for future research to further explore the differences between buyers’ and sellers’ behavior in C2C e-commerce environments.

When love becomes hate: how different consumer-brand relationships interact with crises to influence consumers' reactions

2020 ◽  
Vol 25 (3) ◽  
pp. 357-375 ◽  
Author(s):  
Liang Ma
Keyword(s):  
Public Relations ◽  
Crisis Communication ◽  
Behavioral Intentions ◽  
Structural Equation ◽  
Equation Modeling ◽  
Future Research ◽  
Brand Relationships ◽  
Content Type ◽  
Different Types ◽  
Buffering Effects

PurposeA well-accepted proposition in the literature of corporate strategic communication and public relations is that consumer-brand relationships (CBRs) affect corporate crisis communication. However, it is inconclusive whether CBRs protect or work against brands, because both buffering effects and love-becomes-hate effects have been found. This study attempts to explain and bridge the seemingly inconsistent findings by clarifying the effects of different types of CBRs in different brand transgressions.Design/methodology/approachRe-conceptualizing CBRs into non-identifying relationships and identifying relationships, this study examined the possible interaction effects of CBRs and crises on consumers' attitudes and emotions, which then influence their behavioral intentions. A three-step multi-group structural equation modeling (SEM) was used to analyze the data collected from an online experiment with nearly 900 consumers of two brands.FindingsAlthough non-identifying relationships offer buffering effects, identifying relationships primarily offer love-becomes-hate effects by intensifying negative emotions such as anger and disappointment, which in turn affect consumers' behavioral intentions. Such patterns hold regardless of whether a crisis directly threatens the core meaning of the brand.Originality/valueThis study clarifies the effects of different types of CBRs in crises and shows that deep psychological connections (i.e. identifying relationships) offer love-becomes-hate effects. It suggests that one promising future research direction for crisis communication and public relations scholars is to examine how to mitigate such love-becomes-hate effects so that brands can keep their loyal consumers.

Expert cues: how expert reviewers are perceived online

2020 ◽  
Vol 30 (4/5) ◽  
pp. 531-556 ◽  
Author(s):  
Anna Naujoks ◽  
Martin Benkenstein
Keyword(s):  
Design Methodology ◽  
Online Reviews ◽  
The Other ◽  
Future Research ◽  
Review Author ◽  
Content Type ◽  
Source Expertise ◽  
Different Types ◽  
Practical Implications

PurposeThe purpose of this paper is to explore different types of source expertise and how they influence perceived message quality. Consumers face the challenge to identify valuable online reviews. Source expertise as a signal of message quality can be displayed differently, depending on website layout, operator and review author.Design/methodology/approachTwo scenario-based experiments were conducted questioning 135 and 275 participants. They investigate the effect of different types of expert reviewers on perceived message quality and also examine the interplay of source expertise and source trustworthiness.FindingsThe findings reveal that the different types of expert reviewers differ in perceived expertise and their impact on perceived message quality. Claims of expertise induce the highest perceived expertise compared to the other expert types and non-experts, but are perceived as less trustworthy.Research limitations/implicationsFuture research should examine the influence of the expert types across different product and service categories and could also include moderating influences that reflect how consumers process expert cues differently.Practical implicationsCues that signal high expertise and high trustworthiness are likely to deliver the most valuable online reviews. This should be incorporated in the website's layout to help consumers find valuable information.Originality/valueThe approach of this research is novel in that it undertakes comparisons between three types of expert cues and non-experts. It also addresses the interplay of source expertise and trustworthiness and examines the effect on message quality.

Environmental comfort based (ECB) methodology as a tool for preparing Kaizen application in a catering service company

2018 ◽  
Vol 30 (4) ◽  
pp. 281-295 ◽  
Author(s):  
Carmen Jaca ◽  
Marta Ormazabal ◽  
Elisabeth Viles ◽  
Javier Santos
Keyword(s):  
Future Research ◽  
Content Type ◽  
Worker Participation ◽  
Different Types ◽  
Framework Approach ◽  
Improvement Programs ◽  
A Company ◽  
Participatory Analysis ◽  
Practical Implications ◽  
Research Recommendations

Purpose The purpose of this paper is to develop a methodology that is based on the concept of environmental comfort and can serve as a tool that can help companies and employees to implement Kaizen projects. This methodology focuses on the worker’s participation in analyzing and developing improvements related to their workplace. Design/methodology/approach This research is focused on the development of a methodology that encourages worker participation in improvement activities, through the analysis of their working conditions. For this purpose, the proposed methodology was developed in accordance with the dimensions of workplace comfort proposed by Vischer. The employees start working on the analysis of problems and their solutions through the logical framework approach, as it is a tool that encourages worker participation and consensus. The developed methodology was applied in a company, with three different groups of people, which enabled the authors to test its utility. Findings The findings reveal that the proposed methodology is effective in initiating workers in the path of Kaizen. The employees who applied this methodology were able to propose improvement actions that addressed the problems and opportunities that they had previously detected. Moreover, the questionnaire that was used to validate the methodology and was administered to employees shows that the methodology is useful in preparing them for adopting continuous improvement (CI) programs. Research limitations/implications The methodology presented in this paper has been applied and evaluated by a small number of employees. These limitations suggest future research recommendations. Practical implications This participatory methodology could be used by different types of companies to initiate employees on the path of CI, even if they are not familiar with improvement programs or methodologies. In addition, its use could improve the capabilities of employees in areas such as participatory analysis, problem identification and proposal of objectives. These capabilities are necessary in any Kaizen project. As a result of the application of this methodology, the companies could obtain a list of areas of improvement related to their work and propose actions to work on. Originality/value The paper presents the use of environmental comfort in the workplace as the first step in accomplishing a Kaizen project, with a focus on the employee involvement and consensus.

scholarly journals Age effects on juvenile homicide perpetration

2015 ◽  
Vol 5 (3) ◽  
pp. 163-176 ◽  
Author(s):  
Laura Hammond ◽  
Maria Ioannou
Keyword(s):  
Design Methodology ◽  
Research Literature ◽  
Future Research ◽  
Offender Treatment ◽  
Content Type ◽  
The Public ◽  
Age Related ◽  
Different Types ◽  
Juvenile Homicide ◽  
Media Reports

Purpose – In order to address a notable gap in the research literature, the purpose of this paper is to examine age-related differences in juvenile homicide perpetration. Design/methodology/approach – Data on 150 juvenile homicide offenders and their offences was derived from material available within the public domain, including media reports, case studies, court reports and previously published studies. Comparisons were then made between those aged 14 and under (n=63) and those aged 14-17 (n=87) across a range of offender, victim and offence-related variables. Findings – There were no significant differences between the child (U-14) and adolescent (14-17) offender samples on any of the measured variables. The two groups had similar backgrounds, selected similar types of victims, had comparable breakdowns of different types of victim-offender relationship and had similar patterns of weapon use. Research limitations/implications – The fact that the two groups did not differ significantly has notable implications in practical and applied domains. By identifying risk factors for juvenile homicide perpetration, findings open up a range of possibilities for identification, investigation and intervention. In addition, findings might inform the development of offender treatment and rehabilitation programmes. Key limitations relate to the quality and quantity of data employed. Ways of remedying these weaknesses in future research are addressed. Originality/value – This is the first study to directly compare child and adolescent perpetrators of homicide over a broad range of offender, victim and offence attributes.

scholarly journals INNOVATIVE LASER TECHNOLOGY IN TEXTILE INDUSTRY: MARKING AND ENGRAVING

2017 ◽  
Vol 3 ◽  
pp. 15
Author(s):  
Yordanka Angelova ◽  
Silvija Mežinska ◽  
Lyubomir Lazov
Keyword(s):  
Textile Industry ◽  
Textile Processing ◽  
Laser Applications ◽  
Laser Marking ◽  
Sand Blasting ◽  
Laser Technology ◽  
Textile Materials ◽  
Laser Technologies ◽  
Innovative Solution

The advent of laser technology in textiles industry has established a new innovative solution, which successfully prevents some of the weaknesses in the conventional technologies. Lasers are being used in Laser Marking (Only the surface of fabric is processed, fading), Laser Engraving (Controlled cutting to depth). It has been used extensively as the replacement of some conventional dry processes like sand blasting, hand sanding, destroying, and grinding etc., which are potentially harmful and disadvantageous for the environment. The article considers some innovative laser technologies, such as marking and engraving on various textile materials. The laser applications for leather and textile processing were analysed. The report overviews systems and ways of laser marking and engraving implementations. Classification of markings was proposed. The advantages of laser marking and engraving technologies in textile fields were pointed.

Sign in / Sign up

Export Citation Format

Share Document