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Article
Publication date: 9 June 2022

Afaq Ahmad, Zahoor Ahmad, Abdullah Ullah, Naveed Ur Ur Rehman, Muhammad Israr, Muhammad Zia, Haider Ali and Ataur Rahman

This study aims to investigate and compare the characteristics of three topologies of moving-magnet linear oscillating actuator (LOA) based on their mover position. Positive…

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Abstract

Purpose

This study aims to investigate and compare the characteristics of three topologies of moving-magnet linear oscillating actuator (LOA) based on their mover position. Positive aspects and consequences of every topology are demonstrated. Three topologies of axially magnetized moving-magnet LOA; outer mover, inner mover (IM) and dual stator (DS) are designed and examined. Due to its characteristically high thrust density and more mechanical strength, axially magnetized tubular permanent magnets (PMs) are used in these topologies.

Design/methodology/approach

LOAs are designed and optimized using parametric sweep, in term of design parameters and output parameters like thrust force, stroke and operating resonance frequency of the LOA. All the pros and cons of each topology are investigated and compared. Output parameters of the LOAs are compared using same size of the investigated LOAs. Mover mass, which plays a vital role in resonant operation, is analyzed for IM and DS designs. Investigated LOAs are compared with conventional designs of LOA for compressor in refrigeration system with regards of motor constant, stroke and thrust per PM mass.

Findings

This paper analyzes three topologies of moving-magnet LOAs. The basic difference between investigated LOAs is the radius of tubular-shaped mover from its central axis. All the design parameters are compared and concluded that thrust per PM mass of IMLOA is maximum. OMLOA provides maximum motor constant of value 180 N/A. DSLOA provides thrust force with motor constant 120 N/A and required intermediate materials of PMs. All the three designs give the best results in terms of motor constant and thrust per PM mass, compared to conventional designs of LOA.

Originality/value

This paper determines the impact of mover position from its central axis in a tubular-shaped moving-magnet LOA. This work is carried out in correspondence of latest papers of LOA.

Details

World Journal of Engineering, vol. 20 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

Book part
Publication date: 23 December 2010

Ataur Rahman Belal, Md. Rezaul Kabir, Stuart Cooper, Prasanta Dey, Niaz Ahmed Khan, Taiabur Rahman and Mohobbot Ali

Purpose – In this article, we examine the nature and the extent of corporate environmental and climate change disclosures in Bangladesh.Design/methodology/approach – For this…

Abstract

Purpose – In this article, we examine the nature and the extent of corporate environmental and climate change disclosures in Bangladesh.

Design/methodology/approach – For this purpose, we have undertaken a content analysis of annual reports related to the year 2008 and websites of the 100 largest companies (according to market capitalization) listed on the Dhaka Stock Exchange. We have used 24 content analysis categories to capture the relevant disclosures related to climate change and other environmental issues.

Findings – Key findings of our analysis suggest that the level of environmental and climate change disclosures is very low in Bangladesh. Although 91% of companies made disclosures in at least one category, most companies disclosed information only on the “energy usage” category, which is a mandatory requirement. Even fewer companies made disclosures in the specific areas of climate change. No disclosure was made in the significant categories such as GHG emissions. The second most popular category related to climate change was adaptation measures. Among the other environmental disclosures, a significant finding is that only 5% of (website 6%) companies disclosed that they had an effluent treatment plant. Closer examination of the nature of disclosures suggests that most of the disclosures are positive and descriptive in nature.

Originality/value – As far as we are aware, this is the first study of its kind in Bangladesh which systematically examines corporate climate change disclosures as a particular focus of research.

Details

Research in Accounting in Emerging Economies
Type: Book
ISBN: 978-0-85724-452-9

Keywords

Content available
Article
Publication date: 1 April 2004

264

Abstract

Details

Disaster Prevention and Management: An International Journal, vol. 13 no. 2
Type: Research Article
ISSN: 0965-3562

Article
Publication date: 12 June 2007

Ataur Rahman Belal and David L. Owen

This paper seeks to respond to recent calls for more engagement‐based studies of corporate social reporting (CSR) practice by examining the views of corporate managers on the…

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Abstract

Purpose

This paper seeks to respond to recent calls for more engagement‐based studies of corporate social reporting (CSR) practice by examining the views of corporate managers on the current state of, and future prospects for, social reporting in Bangladesh.

Design/methodology/approach

The paper uses a series of interviews with senior managers from 23 Bangladeshi companies representing the multinational, domestic private and public sectors.

Findings

Key findings are that the main motivation behind current reporting practice lies in a desire on the part of corporate management to manage powerful stakeholder groups, whilst perceived pressure from external forces, notably parent companies' instructions and demands from international buyers, is driving the process forward. In the latter context it appears that adoption of international social accounting standards and codes is likely to become more prevalent in the future. Reservations are expressed as to whether such a passive compliance strategy is likely to achieve much in the way of real changes in corporate behaviour, particularly when Western developed standards and codes are imposed without consideration of local cultural, economic and social factors. Indeed, such imposition could be regarded as little more than an example of the erection of non‐tariff trade barriers rather than representing any meaningful move towards empowering indigenous stakeholder groups.

Originality/value

The paper contributes to the literature on CSR in developing countries where there is a distinct lack of engagement‐based published studies.

Details

Accounting, Auditing & Accountability Journal, vol. 20 no. 3
Type: Research Article
ISSN: 0951-3574

Keywords

Article
Publication date: 1 July 2001

Ataur Rahman Belal

Most of the corporate social reporting (CSR) studies conducted so far have been in the context of developed countries. Very few studies are available on the CSR practices in…

6416

Abstract

Most of the corporate social reporting (CSR) studies conducted so far have been in the context of developed countries. Very few studies are available on the CSR practices in developing countries. Given the different socio‐economic context of developing countries it is argued that it is important to learn about the CSR practices in those countries. This study reports the results of a survey of CSR practices in Bangladesh. The main contribution of this paper is that in addition to measuring the extent and volume of disclosures by using content analysis, it explores the socio‐political and economic context in which these disclosures take place.

Details

Managerial Auditing Journal, vol. 16 no. 5
Type: Research Article
ISSN: 0268-6902

Keywords

Article
Publication date: 1 May 2023

Bobby Hajjaj

Recent academic work on leadership has focused largely on organizational leadership. This study takes a close look at political leadership, especially that given to popular…

Abstract

Purpose

Recent academic work on leadership has focused largely on organizational leadership. This study takes a close look at political leadership, especially that given to popular movements, and delineates a new model of transformational leadership.

Design/methodology/approach

The current study borrows models from organizational leadership research and applies them to a specific case study to reveal critical concepts underlying transformational leadership. Application of these models to Bangladesh's founding father, Bangabandhu Sheikh Mujibur Rahman, during the two decades of the 1950 and 1960s, shows potential for a new flexible framework for transformational leadership with added significance on leader–follower relatedness, socio-historical context and charisma.

Findings

This study presents clear evidence on the nature of leadership in popular movements and using a specific case study elucidates that movements pick leaders who meet distinct criteria specific to the movement, including a vision that resounds with key follower-groups and prototypicality.

Research limitations/implications

This study presents a new lens under which political and popular leadership can be studied, focusing away from person, political party or rational choice and voting behavior-based ideas of political leadership.

Originality/value

The findings reveal the importance of seeking new ways to fit leadership theory with burgeoning social phenomenon.

Book part
Publication date: 1 December 2009

Ataur Rahman Belal and Mahmood Momin

Purpose – Previous reviews of Corporate Social Reporting (CSR) literature have tended to focus on developed economies. The aim of this study is to extend reviews of CSR literature…

Abstract

Purpose – Previous reviews of Corporate Social Reporting (CSR) literature have tended to focus on developed economies. The aim of this study is to extend reviews of CSR literature to emerging economies.

Design/methodology/approach – A desk-based research method, using a classification framework of three categories.

Findings – Most CSR studies in emerging economies have concentrated on the Asia-Pacific and African regions and are descriptive in nature, used content analysis methods and measured the extent and volume of disclosures contained within the annual reports. Such studies provide indirect explanation of the reasons behind CSR adoption, but of late, a handful of studies have started to probe managerial motivations behind CSR directly through in-depth interviews finding that CSR agendas in emerging economies are largely driven by external forces, namely pressures from parent companies, international market and international agencies.

Originality/value – This is the first review and analysis of CSR studies from the emerging economy perspective. Following this analysis, the authors have identified some important future research questions.

Details

Accounting in Emerging Economies
Type: Book
ISBN: 978-1-84950-626-7

Book part
Publication date: 9 March 2021

Sudipta Jha and Ataur Rahman

In this study, we would like to examine the export prospect of India in the era of neo-protectionism. This particular era is characterized by increased used of trade barriers…

Abstract

In this study, we would like to examine the export prospect of India in the era of neo-protectionism. This particular era is characterized by increased used of trade barriers mainly by the large economies and a very sluggish growth in world export as a whole. Our study shows that both tariff and non-tariff barriers as well as world income affect India’s exports significantly. And, India as of 2017–2018, exports nearly 40% of its exportable to the developed world. So, the present era is not very encouraging for India. As a strategic response, it may try to re-orient its exports from more restrictive developed countries like European Union to countries like Japan, which are much less restrictive, as complete re-orientation from developed to developing world is not possible.

Details

Global Tariff War: Economic, Political and Social Implications
Type: Book
ISBN: 978-1-80071-314-7

Keywords

Content available
Book part
Publication date: 9 March 2021

Abstract

Details

Global Tariff War: Economic, Political and Social Implications
Type: Book
ISBN: 978-1-80071-314-7

Content available
Book part
Publication date: 23 December 2010

Abstract

Details

Research in Accounting in Emerging Economies
Type: Book
ISBN: 978-0-85724-452-9

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