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Article
Publication date: 11 September 2019

Tobias Kolb, Reza Elahi, Jan Seeger, Mathews Soris, Christian Scheitler, Oliver Hentschel, Jan Tremel and Michael Schmidt

The purpose of this paper is to analyse the signal dependency of the camera-based coaxial monitoring system QMMeltpool 3D (Concept Laser GmbH, Lichtenfels, Germany) for laser…

565

Abstract

Purpose

The purpose of this paper is to analyse the signal dependency of the camera-based coaxial monitoring system QMMeltpool 3D (Concept Laser GmbH, Lichtenfels, Germany) for laser powder bed fusion (LPBF) under the variation of process parameters, position, direction and layer thickness to determine the capability of the system. Because such and similar monitoring systems are designed and presented for quality assurance in series production, it is important to present the dominant signal influences and limitations.

Design/methodology/approach

Hardware of the commercially available coaxial monitoring QMMeltpool 3D is used to investigate the thermal emission of the interaction zone during LPBF. The raw images of the camera are analysed by means of image processing to bypass the software of QMMeltpool 3D and to gain a high level of signal understanding. Laser power, scan speed, laser spot diameter and powder layer thickness were varied for single-melt tracks to determine the influence of a parameter variation on the measured sensory signals. The effects of the scan direction and position were also analysed in detail. The influence of surface roughness on the detected sensory signals was simulated by a machined substrate plate.

Findings

Parameter variations are confirmed to be detectable. Because of strong directional and positional dependencies of the melt-pool monitoring signal a calibration algorithm is necessary. A decreasing signal is detected for increasing layer thickness. Surface roughness is identified as a dominating factor with major influence on the melt-pool monitoring signal exceeding other process flaws.

Research limitations/implications

This work was performed with the hardware of a commercially available QMMeltpool 3D system of an LPBF machine M2 of the company Concept Laser GmbH. The results are relevant for all melt-pool monitoring research activities connected to LPBF, as well as for end users and serial production.

Originality/value

Surface roughness has not yet been revealed as being one of the most important origins for signal deviations in coaxial melt-pool monitoring. To the best of the authors’ knowledge, the direct comparison of influences because of parameters and environment has not been published to this extent. The detection, evaluation and remelting of surface roughness constitute a plausible workflow for closed-loop control in LPBF.

Details

Rapid Prototyping Journal, vol. 26 no. 1
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 4 August 2023

Hamid Asnaashari, Abbas Sheikh Aboumasoudi, Mohammad Reza Mozaffari and Mohammad Reza Feylizadeh

The application of correct contractor selection strategies leads to the selection of a qualified contractor and, as a result, the on-time delivery of the project with the desired…

134

Abstract

Purpose

The application of correct contractor selection strategies leads to the selection of a qualified contractor and, as a result, the on-time delivery of the project with the desired quality and within the predetermined budgetary constraints. For this reason, evaluating and qualifying contractors before reviewing the proposed prices has been considered an important issue. One factor that disrupts the project completion process and the failure to achieve pre-planned goals effectively is the occurrence of contractors' disputes and claims in projects. To this end, the present study explores claim-reduction strategies for selecting effective contractors in an uncertain environment to reduce possible problems.

Design/methodology/approach

The two-step grey data envelopment analysis (GDEA) approach was used to measure efficiency as a powerful tool in selecting efficient contractors during tenders. This approach can extend the applications of multi-criteria decision-making (MCDM) models. In other words, given some uncertainties, the unavailability of some data, and the problems with the DEA model, the two-step GDEA model was used to rank the contractors. The data confirmed the satisfactory outcomes from the selected model.

Findings

The preliminary assessment of contractors is a pre-tendering process and a step in categorizing contractors, excluding contractors lacking required qualifications, and selecting efficient contractors. At first, it will help the employer to exclude inexperienced and unqualified contractors, save resources and time, reduce threats, replace opportunities with threats, and reduce material and non-material costs during the completion of the project until the projects are put into operation. Consequently, this approach reduces claims to a minimum level and increases the organization's effective material and non-material profit.

Originality/value

Oil and gas plans and projects have a significant, sensitive, and decisive role in the economic, social, political, cultural, infrastructural, and all-round development of Iran; This is while most of the financial resources needed to implement the development and programs across the country come from oil revenues. Studies have indicated that despite the importance of these plans and projects, many of them are not completed successfully, and this causes irreparable losses to the country's economy and development in various fields.

Highlight

  1. The findings of this study can be used by organizations to select more effective contractors to assign projects and plans to them.

  2. The preliminary assessment of contractors is a pre-tendering process and a step in categorizing contractors, excluding contractors who lack required qualifications, and finally selecting efficient contractors.

  3. At first, it will help the employer to exclude inexperienced and unqualified contractors, save resources and time, reduce threats, replace opportunities with threats, and reduce material and non-material costs during the completion of the project until the projects are put into operation.

  4. This approach also gives credit to the employer during the execution period and contributes to assessing unqualified contractors and reducing the temptation to hand over the project to an unqualified contractor but with a lower bid price.

  5. Consequently, this approach reduces claims to a minimum level and increases the effective material and non-material profit of the organization.

  6. Moreover, it provides an extra-organizational evaluation for contractors, motivating them to upgrade their capabilities and optimally allocate material and non-material resources, especially human resources.

The findings of this study can be used by organizations to select more effective contractors to assign projects and plans to them.

The preliminary assessment of contractors is a pre-tendering process and a step in categorizing contractors, excluding contractors who lack required qualifications, and finally selecting efficient contractors.

At first, it will help the employer to exclude inexperienced and unqualified contractors, save resources and time, reduce threats, replace opportunities with threats, and reduce material and non-material costs during the completion of the project until the projects are put into operation.

This approach also gives credit to the employer during the execution period and contributes to assessing unqualified contractors and reducing the temptation to hand over the project to an unqualified contractor but with a lower bid price.

Consequently, this approach reduces claims to a minimum level and increases the effective material and non-material profit of the organization.

Moreover, it provides an extra-organizational evaluation for contractors, motivating them to upgrade their capabilities and optimally allocate material and non-material resources, especially human resources.

Details

Grey Systems: Theory and Application, vol. 13 no. 4
Type: Research Article
ISSN: 2043-9377

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Book part
Publication date: 10 December 2018

Seyed Mohammad Moghimi

Abstract

Details

Principles and Fundamentals of Islamic Management
Type: Book
ISBN: 978-1-78769-674-7

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Article
Publication date: 28 August 2009

Parisa Shojaei, Mohammad Reza Maleki and Rafat Bagherzadeh

Hospitals are all required to be prepared against crisis, while according to studies, most hospitals are not prepared enough to encounter disaster problems. Therefore, each…

477

Abstract

Purpose

Hospitals are all required to be prepared against crisis, while according to studies, most hospitals are not prepared enough to encounter disaster problems. Therefore, each hospital should have an established programme to face earthquake and other catastrophes. This paper aims to investigate this issue.

Design/methodology/approach

This descriptive study was carried out in teaching hospitals of Iran University of Medical Sciences. Data collection was done using a checklist including general information, as well as information on demography, security, supplies and equipment, evacuation and communication. This procedure was done through observation and interview with hospital managers, etc. and the data were analyzed by SPSS software.

Findings

In the hospitals four dimensions of planning were studied and the following mean scores were obtained. On security, Hazrat Rasul hospital scored the highest (88.4) while Navab Safavi, Haftome Tir and Ali Asghar hospitals scored the lowest (51.4). On supplies and equipment, Navab Safavi and Haftome Tir hospitals obtained the highest score (66.6) and Hasheminejad, Shafa Yahyaeian, Firoozgar and Hazrat Rasul hospitals got the lowest score (60.0). On evacuation, Hazrat Rasul and Haftome Tir hospitals scored the highest and lowest respectively (64.2), (47.0). On communication, Hasheminejad hospital scored the highest (63.2) while Firoozgar hospital scored the lowest (36.6). In general from among ten hospitals under study the most and the least prepared hospitals were Hazrat Rasul and Navab Safavi respectively (65.65), (54.3).

Originality/value

The paper shows that most hospitals under study were not prepared enough against crisis and communication is found to be the weakest aspect although it is regarded as a basic principle in planning. Hazrat Rasul hospital was well prepared against crisis due to its disaster plan.

Details

Disaster Prevention and Management: An International Journal, vol. 18 no. 4
Type: Research Article
ISSN: 0965-3562

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Article
Publication date: 5 January 2022

Dilara Begum and Md. Hasinul Elahi

The purpose of this paper is to discuss the East West University Library’s (EWUL’s) response to COVID-19 situation through their transformation to digital services. The paper…

1280

Abstract

Purpose

The purpose of this paper is to discuss the East West University Library’s (EWUL’s) response to COVID-19 situation through their transformation to digital services. The paper tries to explain how these digital library services support the user community of East West University (EWU) in online teaching and access to information resources.

Design/methodology/approach

This paper describes the EWUL’s several digital services that are used to meet the needs of its user community during the COVID-19 pandemic. The reflective practice approach has been undertaken for this study on the basis of the authors’ personal experiences working at an academic library. The authors used the reflective practice approach to assess the library’s practice during crisis situation, make the use of technological interventions in service providing and also to re-innovate the digital services for future.

Findings

During the pandemic, the library shifted all the possible physical or on-site services to digital services, i.e. online resource facilities and remote access to these, federated searching, Web online public access catalog, engaging users through social media, specialized knowledge space, online document delivery, article on request, information literacy training, virtual reference service, etc. The user engagement in all these services is also notable.

Research limitations/implications

The nature of this study is limited to the COVID-19 pandemic and within a particular geographic location.

Practical implications

This paper has implications and possible applications for other university libraries in developing countries, which intends to transform their services into digital for ensuring better service quality for their respective user community.

Originality/value

This paper makes a valuable contribution to the literature on how a private university library of a developing country is responding to pandemics such as COVID-19.

Details

Digital Library Perspectives, vol. 38 no. 3
Type: Research Article
ISSN: 2059-5816

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Article
Publication date: 7 November 2008

M. Shah Alam Khan

Bangladesh is one of the most disaster‐prone countries in the world. Natural disasters adversely affect the country's economy and deter its development. Thus preparedness for the…

5685

Abstract

Purpose

Bangladesh is one of the most disaster‐prone countries in the world. Natural disasters adversely affect the country's economy and deter its development. Thus preparedness for the disasters, along with effective prevention and mitigation measures, is imperative for sustainable development of the country. The purpose of this paper is to examine the present state of disaster preparedness in the country with special attention to the more frequent and damaging disasters – flood and cyclone.

Design/methodology/approach

A detailed study of the effects of natural disasters, disaster prevention and mitigation measures, and institutional setting for disaster preparedness was undertaken.

Findings

Plans and programs have been formulated to manage natural disasters. In a “Cyclone Preparedness Program”, trained volunteers facilitate emergency response and proper use of the multi‐purpose shelters. Within an institutional framework for disaster management, several Non‐Government Organizations (NGOs) work for disaster preparedness alongside the government organizations. Their formal and nonformal education programs on disaster preparedness have a common objective of promoting resilient and sustainable communities.

Practical implications

Planning and design of structural interventions for prevention and mitigation of natural disasters should be done more carefully to avoid adverse impacts on the environment. A participatory approach is essential in this process. Education and awareness‐building programs need wider and easier access to the people.

Originality/value

The paper concludes that the institutional arrangement for cyclone preparedness and response is unique and efficient, and that participation of NGOs in the preparedness program contributes significantly toward sustainable development. These lessons will be important for development planning in other sectors.

Details

Disaster Prevention and Management: An International Journal, vol. 17 no. 5
Type: Research Article
ISSN: 0965-3562

Keywords

Available. Open Access. Open Access
Article
Publication date: 18 December 2024

Reza Marvi, Pantea Foroudi and Maria Teresa Cuomo

This paper aims to explore the intersection of artificial intelligence (AI) and marketing within the context of knowledge management (KM). It investigates how AI technologies…

731

Abstract

Purpose

This paper aims to explore the intersection of artificial intelligence (AI) and marketing within the context of knowledge management (KM). It investigates how AI technologies facilitate data-driven decision-making, enhance business communication, improve customer personalization, optimize marketing campaigns and boost overall marketing effectiveness.

Design/methodology/approach

This study uses a quantitative and systematic approach, integrating citation analysis, text mining and co-citation analysis to examine foundational research areas and the evolution of AI in marketing. This comprehensive analysis addresses the current gap in empirical investigations of AI’s influence on marketing and its future developments.

Findings

This study identifies three main perspectives that have shaped the foundation of AI in marketing: proxy, tool and ensemble views. It develops a managerially relevant conceptual framework that outlines future research directions and expands the boundaries of AI and marketing literature within the KM landscape.

Originality/value

This research proposes a conceptual model that integrates AI and marketing within the KM context, offering new research trajectories. This study provides a holistic view of how AI can enhance knowledge sharing, strategic planning and decision-making in marketing.

Details

Journal of Knowledge Management, vol. 29 no. 11
Type: Research Article
ISSN: 1367-3270

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Book part
Publication date: 10 December 2018

Seyed Mohammad Moghimi

Abstract

Details

Organizational Behavior Management
Type: Book
ISBN: 978-1-78769-678-5

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Article
Publication date: 31 March 2023

Mohammad Reza Zahedi, Shayan Naghdi Khanachah and Shirin Papoli

The purpose of this study paper is to identify and prioritize the factors affecting the knowledge flow in high-tech industries.

203

Abstract

Purpose

The purpose of this study paper is to identify and prioritize the factors affecting the knowledge flow in high-tech industries.

Design/methodology/approach

This research is applied in terms of purpose and descriptive-survey in terms of data collection method. This research has been done in a qualitative–quantitative method. In the qualitative part, due to the nature of the data in this study, expert interviews have been used. The sample studied in this research includes 35 managers and expert professors with experience in the field of knowledge management working in universities and high-tech industries who have been selected by the method of snowball. In the quantitative part, the questionnaire tool and DANP multivariate decision-making method have been used.

Findings

In this study, a multicriteria decision-making technique using a combination of DEMATEL and ANP (DANP) was used to identify and prioritize the factors affecting the knowledge flow in high-tech industries. In this study, the factors affecting the knowledge flow, including 8 main factors and 31 subfactors, were selected. Human resources, organizational structure, organizational culture, knowledge communication, knowledge management tools, knowledge characteristics, laws, policies and regulations and financial resources were effective in improving knowledge flow, respectively.

Originality/value

By studying the research, it was found that the study area is limited, and the previous work has remained at the level of documentation and little practical use has been done. In previous research, the discussion of knowledge flow has not been very open, and doing incomplete work causes limited experiences and increases cost and time wastage, and parallel work may also occur. Therefore, to complete the knowledge management circle and fully achieve the research objectives, as well as to make available and transfer the experiences of people working in this field and also to save time and reduce costs, the contents and factors of previous models have been counted. It is designed for high-tech industries, a model for the flow of knowledge.

Details

Journal of Science and Technology Policy Management, vol. 15 no. 5
Type: Research Article
ISSN: 2053-4620

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Article
Publication date: 29 July 2024

Arash Arianpoor, Saba Sabah Dheyab Al-Ani and Hameed Mohsin Khayoon

This study aims to provide a qualitative framework for satisfactory sustainable education for international accounting students using a meta-synthetic approach.

47

Abstract

Purpose

This study aims to provide a qualitative framework for satisfactory sustainable education for international accounting students using a meta-synthetic approach.

Design/methodology/approach

To determine the components and indicators of satisfactory sustainable education for international accounting students, a meta-synthesis allows for the attainment of the objectives of study. In the first phase of study, international related literature was reviewed (n = 2,176). After several screenings for measuring the quality of the related literature including Critical Appraisals Skills Program (CASP), the total number of selected papers was 48, and 2,128 were excluded.

Findings

The present research proposed a comprehensive conceptual model for sustainable education and international accounting students’ satisfaction, with seven components and 63 indicators. To assess the credibility of phases, the indicators were presented to five experts independently. The reliability of the proposed conceptual model was tested using Cohen’s Kappa coefficient and analyzed in SPSS. Kappa’s coefficient showed that the agreement level was high and the reliability was high too.

Originality/value

Sustainable education and student satisfaction are crucial for maintaining a competitive international education market. There are ongoing debates about accounting education, particularly accreditation challenges and the need for clear regulations on academic interaction with practice. Accounting education has also been criticized for being outdated, promoting surface-level learning and neglecting the development of broader skills in university graduates. Therefore, it is important to understand sustainable education for international accounting students. The present study aims to identify the aspects of accounting educational services that international accounting students perceive important for increasing satisfaction. This research provides empirical evidence and suggests potential avenues for future research in other countries.

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