ORCID Profile
0000-0002-3568-9579
Current Organisation
Sultan Zainal Abidin University
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Publisher: Springer International Publishing
Date: 2021
Publisher: Wiley
Date: 30-05-2016
Abstract: The aim of this systematic review is to evaluate the radiation dose reduction achieved using iterative reconstruction (IR) compared to filtered back projection (FBP) in coronary CT angiography (CCTA) and assess the impact on diagnostic image quality. A systematic search of seven electronic databases was performed to identify all studies using a developed keywords strategy. A total of 14 studies met the criteria and were included in a review analysis. The results showed that there was a significant reduction in radiation dose when using IR compared to FBP (P 0.05). The mean ± SD difference of image noise, signal-noise ratio (SNR) and contrast-noise ratio (CNR) were 1.05 ± 1.29 HU, 0.88 ± 0.56 and 0.63 ± 1.83 respectively. The mean ± SD percentages of overall image quality scores were 71.79 ± 12.29% (FBP) and 67.31 ± 22.96% (IR). The mean ± SD percentages of coronary segment analysis were 95.43 ± 2.57% (FBP) and 97.19 ± 2.62% (IR). In conclusion, this review analysis shows that CCTA with the use of IR leads to a significant reduction in radiation dose as compared to the use of FBP. Diagnostic image quality of IR at reduced dose (30-41%) is comparable to FBP at standard dose in the diagnosis of CAD.
Publisher: Wiley
Date: 03-07-2018
DOI: 10.1002/JMRS.292
Publisher: Emerald
Date: 04-03-2019
Abstract: The purpose of this paper is to investigate whether formal authority of the HR department has any impact on line managers’ evaluations of HR department effectiveness. Two studies were conducted in Vietnam. Study 1 comprised a survey of 405 line managers to test the hypothesized model. Study 2 comprised a survey conducted with 155 line managers validated the findings from Study 1. Structural equation modeling and PROCESS macro were used to analyze the data. Line managers’ perceptions of the HR department’s formal authority had a positive and indirect impact on HR department effectiveness through the HR department’s strategic involvement and influence. Public sector line managers tended to perceive their HR departments as possessing a higher level of formal authority than did their private sector counterparts. This study extends the theory of political influence as it applies to the HR department. Specifically, the study provides empirical evidence of the influences of an organization’s political conditions on the perceptions of HR department effectiveness. This study also contributes to the extant literature on HRM in Vietnam by showing how Vietnam’s HR departments can utilize power and influence in accordance with specific ownership types. Public sector HR managers could establish their formal authority among stakeholders as a way to enhance the recognition of HR department effectiveness. This can be done by relying on the presence of the traditional bureaucratic characteristics of the public sector which confer the HR department with formal authority. The study contributes an understanding of the determinants of HR department effectiveness in the context of Vietnam. Research findings show that highly formal authority practices in the public sector affect the way line managers perceive the strategic involvement of the HR department. The more formal the authority, the more the public sector HR department is perceived to be involved in the strategic management process. Thus, formal authority is a prerequisite that public sector HR departments need to signal its importance among line managers. To have a long-term influencing role in the organization, the HR department in the public sector needs to develop its political and influencing skills. In contrast to this, the private sector HR department needs to develop a strategic partnership with line managers in order to increase its influence and perceived effectiveness.
Publisher: MDPI AG
Date: 12-12-2022
DOI: 10.3390/BUILDINGS12122196
Abstract: Innovation research in construction has almost exclusively focused on economic and technological innovation. In contrast, the emerging concept of social innovation has been largely ignored. This is despite the global growth of social procurement policies which incentivize construction firms to innovate in providing employment opportunities for equity-seeking groups. While there is an emerging body of research which is starting to explore innovative employment pathways into construction for certain equity-seeking groups such as women, refugees and Indigenous people, there has been relatively little research into employment pathways for people with a disability. Addressing this gap in research, this paper reports the results of a critical scoping review of Web of Science, Scopus, PubMed and Google Scholar publications on the employment of people with disability in construction. Using the Preferred Reporting Items for Systematic reviews (PRISMA-ScR) approach, extant research was mapped across seven themes of hiring disability practices. Results indicate that research into the employment of people with disability in construction internationally remains nascent with significant knowledge gaps compared to mainstream disability employment research. These key gaps include: barriers to employment based on the lived experiences of people with disability seeking employment in construction the facilitation of cross-sector relationships with organizations that support people with disability into employment the reduction of biases, ingrained stigmas and inequalities in recruitment practices for people with disability and the role of informal norms and practices in undermining formal laws, regulations and policies designed to reduce barriers to employment. The scoping review also identifies a methodological gap in the research reviewed by highlighting the need for more construction research designs to include people with disability as prioritized research participants as well as research investigators and to adopt phenomenological and interpretive approaches which respect the lived experiences of people with a disability seeking work in the construction industry.
Publisher: Emerald
Date: 22-04-0030
DOI: 10.1108/IJEBR-06-2021-0482
Abstract: This paper examines how some specific psychological characteristics and stress levels of small and medium-sized enterprise (SME) key decision-makers (founders/managers) (KDMs) influence firm goal attainment based on two firm aspiration types. This study hypothesizes that perceived resilience, social skills (self-promotion, ingratiation, expressiveness, social adaptability), and stress of SME KDMs will differently influence firm performance goal achievement based on firm historical versus social aspirations. IBM AMOS v27 is used to test these hypotheses on survey data of 267 Australian SME KDMs. The study reveals that KDMs’ perceived resilience, social skills and stress differentially impact the achievement of firm performance goals when selecting firm-level historical and social aspirations. Resilience and some specific social skills can even have a detrimental effect on achieving firm goals when applying historical and social aspirations. Historical aspirations are based on the firm’s performance history, while social aspirations are based on the performance of a reference group of competitor firms. The differences in the relationship between these characteristics and the two aspiration types are also explained. Furthermore, the study reveals the important role of perceived stress levels in achieving firm performance goals, using both aspiration types. This study is the first to investigate how the perceived use of some specific psychological characteristics of SME KDMs influence the ability to meet firm performance goals based on the discretionary use of historical and social aspirations and the relationship between these aspiration types. In this context, the paper explains the reasons for the differences and similarities in their use. Thus, this study provides an important empirical contribution to research on the emergent domain of micro-foundational SME goals.
Publisher: Wiley
Date: 27-03-2020
DOI: 10.1002/JMRS.387
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Publisher: Oxford University Press (OUP)
Date: 09-09-2022
DOI: 10.1093/RPD/NCAC182
Abstract: The aim of this study was to investigate the current radiation doses for CT examinations throughout a state in Malaysia and, based on this data, to propose local diagnostic reference levels (DRLs) for the most common CT examinations. A study was conducted in three of the four hospitals that have provided CT services throughout the state. A survey booklet was designed to facilitate collection of pertinent CT scan data. The following information were extracted and recorded for each study: tube voltage, tube current, number of scans phases, CT dose index volume (CTDIvol) and dose length product (DLP). Proposed local DRLs of CT brain and thorax were up to 12% lower than the current national DRLs. However, an increase of DLP (median value) for CT abdomen was also found as compared to the 75th percentile of national DRLs. Therefore, considerable optimisation should be made to achieve a better dose reduction.
Publisher: Wiley
Date: 30-04-2018
DOI: 10.1002/JMRS.279
Publisher: Wiley
Date: 13-07-2020
DOI: 10.1002/ACM2.12977
Publisher: Bentham Science Publishers Ltd.
Date: 09-2021
DOI: 10.2174/1573405617666210127101101
Abstract: Digital mammograms with appropriate image enhancement techniques will improve breast cancer detection, and thus increase the survival rates. The objectives of this study were to systematically review and compare various image enhancement techniques in digital mammograms for breast cancer detection. A literature search was conducted with the use of three online databases namely, Web of Science, Scopus, and ScienceDirect. Developed keywords strategy was used to include only the relevant articles. A Population Intervention Comparison Outcomes (PICO) strategy was used to develop the inclusion and exclusion criteria. Image quality was analyzed quantitatively based on peak signal-noise-ratio (PSNR), Mean Squared Error (MSE), Absolute Mean Brightness Error (AMBE), Entropy, and Contrast Improvement Index (CII) values. Nine studies with four types of image enhancement techniques were included in this study. Two studies used histogram-based, three studies used frequency-based, one study used fuzzy-based and three studies used filter-based techniques. All studies reported PSNR values whilst only four studies reported MSE, AMBE, Entropy, and CII values. Filter-based was the highest PSNR values of 78.93, among other types. For MSE, AMBE, Entropy, and CII values, the highest were frequency-based (7.79), fuzzy-based (93.76), filter-based (7.92), and frequency-based (6.54) respectively. In summary, image quality for each image enhancement technique is varied, especially for breast cancer detection. In this study, the frequency-based of Fast Discrete Curvelet Transform (FDCT) via the UnequiSpaced Fast Fourier Transform (USFFT) shows the most superior among other image enhancement techniques.
Publisher: SAGE Publications
Date: 06-02-2022
DOI: 10.1177/02662426211049503
Abstract: ‘Ad hoc organising’ is becoming an increasingly important topic in the growing literature on disrupted contexts. It is viewed as an emergent, largely unpredictable phenomenon. However, few theoretical frameworks exist for understanding how small and medium-sized enterprises (SMEs) engage in ad hoc organising, via the convergence of people and organisations, to alleviate suffering in a disrupted context. In this inductive, theory-building, multiple case study, we explore the way collective agency in an SME emerges in the process of ad hoc organising. Our findings identify two overlapping micro-processes that enable collective agency in a disrupted context: building collective efficacy and initiating communal coping. Together, these micro-processes lead to SME leaders achieving collective outcomes for the community in ad hoc organising. We discuss these findings in relation to the literature on ad hoc organising and SMEs in disrupted contexts.
Publisher: IOP Publishing
Date: 08-2021
DOI: 10.1088/1757-899X/1173/1/012065
Abstract: Digital mammograms are commonly used for breast screening, especially to aid the detection of cancer. However, digital mammograms suffer with low contrast images due to the low exposure factors used. This paper presents a novel image enhancement technique for digital mammogram images known as Fuzzy Clipped Contrast-Limited Adaptive Histogram Equalization with Anisotropic Diffusion Filter (FC-CLAHE-ADF). This proposed FC-CLAHE-ADF has adopted a fuzzy-based and histogram-based image enhancement technique where it can further reduce the noise of the digital mammograms while preserving the contrast and brightness. A total of six digital mammograms were retrieved from Mammographic Image Analysis Society (MIAS) open-source database. The performance of FC-CLAHE-ADF was compared to Recursive Mean-Separate Histogram Equalization (RMSHE), Fast Discrete Curvelet Transform via Unequally Spaced Fast Fourier Transform (FDCT-USFFT), and FC-CLAHE only. In summary, this novel FC-CLAHE-ADF has provided the most superior results, among other selected enhancement techniques. The resulting images have been able to demonstrate breast lesions better.
Publisher: SAGE Publications
Date: 10-2013
DOI: 10.1002/PMJ.21366
Abstract: This research addresses the competencies organizations use through project manager job advertisements. We develop a list of project manager job competencies break down the competency components into knowledge, skills, and abilities and conduct a comparative analysis of the use of these competencies. We examine the online contents of project manager job advertisements in the public domain. Analysis shows that industry job advertisements emphasize “soft skills” and competencies in a manner different than that in the literature. Additionally, differences are found across countries and between industries. Implications from the findings highlight the incongruent dissemination of project manager competencies, regional and industrial demands, and the recruitment of project managers.
Publisher: Universiti Sultan Zainal Abidin
Date: 31-12-2021
DOI: 10.37231/AJMB.2021.5.S1.447
Abstract: Abdominal radiography is beneficial in a variety of clinical situations. Prior to the introduction of multiplanar imaging, it was considered as the main examination for gastrointestinal pathology. However, the radiation dose received is considered high since it is equivalent to the dose of at least 75 chest radiographs. Personnel including staff or relatives may be required to assist patients in many conditions, increasing unnecessary radiation and the likelihood of radiation-induced cancer. The purpose of this study was to determine the radiation dose received by personnel when eyes and thyroid are exposed during abdominal radiography. The Rando and body phantoms were used to represent personnel and patients in this experimental approach. The dose was measured as entrance surface dose (ESD) by using TLD-100, which was positioned at the Rando phantom's eyes and thyroid. The study included a total of twenty exposures, five times at each of four distinct sites. The mean doses (eyes/thyroid in mGy) were (0.083/0.081), (0.090/0.087), (0.093/0.092), and (0.092/0.089), respectively, at locations 1, 2, 3, and 4. The results indicated that there was no correlation between organ and location affecting ESD measurement (p=0.960). There was no significant difference in dose between the two organs (p=0.355), with the mean difference in the eyes being 0.002 more than in the thyroid. The proximity of the eyes to the tube source contributed for the increased dose observed at the eyes. Though ESD was substantial for location pairings 1 vs. 3 (p=0.001) and 1 vs. 4 (p=0.015) owing to the anode-cathode phenomena. In conclusion, personnel should avoid the tube source and cathode region, since they give a greater dose of radiation, particularly when the personnel are closest to the patient and does not have eyes or thyroid protection.
Publisher: Informa UK Limited
Date: 02-2010
Publisher: Informa UK Limited
Date: 05-09-2021
Publisher: UNIMAS Publisher
Date: 31-10-2021
Abstract: Women with breast cancer have a high risk of death. Digitised mammograms can be used to detect the early stage of breast cancer. However, digitised mammograms suffer low contrast appearances that may lead to misdiagnosis. This paper proposes a Computer-Aided Diagnosis (CAD) system of automated classification of breast cancer lesions using a modified image processing technique of Fuzzy Anisotropic Diffusion Histogram Equalization Contrast Adaptive Limited (FADHECAL) incorporated with Multilevel Otsu Thresholding on digitised mammograms. Four main blocks were used in this CAD system, namely (i) Pre-processing and Enhancement block (ii) Segmentation block (iii) Region of Interests (ROIs) Extraction block and (iv) Classification block. The CAD system was tested on 30 digitised mammograms retrieved from the Mini-Mammographic Image Analysis Society (MIAS) database with various degrees of severity and background tissues. The proposed CAD system showed a high accuracy of 96.67% for the detection of breast cancer lesions.
No related grants have been discovered for Kamarul Amin Abdullah.