Unveiling the Mediating Role of Personality: Exploring the Nexus between Transformational Leadership and Work Stress in Public Organizations

Rohana Ahmad,Mohd Fo’ad Sakdan,Halimah Abdul Manaf 충남대학교 아시아여론연구소 2024 Asian journal for public opinion research Vol.12 No.1

This study investigates the interplay between transformational leadership, personality, and work stress in public organizations, focusing on public servants in Putrajaya, Kuala Lumpur. Data from 702 public servants in Putrajaya, Kuala Lumpur, out of 800 distributed questionnaires, were analyzed. Rigorous analysis employed a structural equation model (SEM) with partial least squares (PLS-SEM) methodology. Our empirical analysis challenges the conventional belief of a positive correlation between transformational leadership and work stress in public organizations, revealing no direct link between transformational leadership and increased work stress in this context. Our study highlights a significant positive correlation between personality and work stress among public servants, emphasizing the role of individual personality characteristics in shaping work-related stress levels. Finally, personality emerged as a crucial mediator in the transformational leadership-work stress relationship, indicating that transformational leadership indirectly influences work stress through its impact on personality. This underscores the importance of considering personality as a mediating factor in understanding the transformational leadership-work stress dynamic in public organizations. In summary, our research provides insights into the relationship between transformational leadership, personality, and work stress in public organizations. These findings challenge conventional assumptions, emphasize individual differences in stress levels, and underscore the mediating role of personality in addressing work stress among public servants.

AOFOG Introduction

( Rohana Haththotuwa ) 대한산부인과학회 2023 서울심포지움 Vol.28 No.-

Classical natural ovine scrapie prions detected in practical volumes of blood by lamb and transgenic mouse bioassays

Rohana P. Dassanayake,Thomas C. Truscott,Dongyue Zhuang,David A. Schneider,Sally A. Madsen-Bouterse,Alan J. Young,James B. Stanton,William C. Davis,Katherine I. O’Rourke 대한수의학회 2015 Journal of Veterinary Science Vol.16 No.2

Scrapie is diagnosed antemortem in sheep by detecting misfolded isoforms of prion protein (PrPSc) in lymphoid follicles of the rectal mucosa and nictitating membranes. Assay sensitivity is limited if (a) the biopsy is collected early during disease development, (b) an insufficient number of follicles is collected, or (c) peripheral accumulation of PrPSc is reduced or delayed. A blood test would be convenient for mass live animal scrapie testing. Currently approved techniques, however, have their own detection limits. Novel detection methods may soon offer a non-animal-based, rapid platform with detection sensitivities that rival the prion bioassay. In anticipation, we sought to determine if diseased animals could be routinely identified with a bioassay using B lymphocytes isolated from blood sample volumes commonly collected for diagnostic purposes in small ruminants. Scrapie transmission was detected in five of six recipient lambs intravenously transfused with B lymphocytes isolated from 5∼10 mL of blood from a naturally scrapie-infected sheep. Additionally, scrapie transmission was observed in 18 ovinized transgenic Tg338 mice intracerebrally inoculated with B lymphocytes isolated from 5∼10 mL of blood from two naturally scrapie-infected sheep. Based on our findings, we anticipate that these blood sample volumes should be of diagnostic value.

Complications of embryo transfer and ovum retrieval in ART

( Rohana Haththotuwa ) 대한산부인과학회 2018 서울심포지움 Vol.23 No.-

Hybrid nanogenerator and enhancement of water–solid contact electrification using triboelectric charge supplier

Wijewardhana, K. Rohana,Shen, Tian-Zi,Jayaweera, E.N.,Shahzad, Amir,Song, Jang-Kun Elsevier 2018 Nano energy Vol.52 No.-

<P><B>Abstract</B></P> <P>Artificially embedded surface charges can dramatically improve the output energy of water–solid contact electrification devices, but the embedded charges easily escape or are cancelled out by adsorption of opponent ions in ambient conditions. Here, we demonstrate a hybrid energy harvesting nanogenerator by combing water–solid and solid–solid contact electrification schemes. It consists of a water–solid contact electrification device and wind-fluttering ribbons that regularly supplies triboelectric surface charges on the solid surface and hence, the high density of surface charges can remain on the surface. This scheme can enhance the harvesting energy by up to a factor of 30 during rain. Moreover, the fluttering ribbons independently collect electric energy from mild winds without rain. This scheme provides a facile, cost-effective, and robust approach to enhance the energy-harvesting efficiency of a water–solid contact electrification device and to combine the energy harvesting from simultaneous rain and wind.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hybrid nanogenerator combining an EDL device and triboelectric ribbons was demonstrated. </LI> <LI> The hybrid nanogenerator produces electricity in both rainy and windy conditions. </LI> <LI> Wind-driven ribbons provides triboelectric charges, producing 30-times more electricity. </LI> <LI> It provides a solution to enhance the electrification efficiency in water–solid nanogenerators. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Energy harvesting using air bubbles on hydrophobic surfaces containing embedded charges

Wijewardhana, K. Rohana,Shen, Tian-Zi,Song, Jang-Kun Elsevier 2017 APPLIED ENERGY Vol.206 No.-

<P>Technology to harvest electrical power from waste micro-mechanical energy is increasingly in demand. A promising approach lies in manipulating the electrical double layer on hydrophobic surfaces; however, the underlying mechanism is still unclear. Here, we demonstrate that ascending air bubbles in water can produce electrical power in a mode similar to other systems that use descending water droplets. Although the two systems, which are analogous to electrons and holes in semiconductors, are similar in fundamental principle, their detailed electrification mechanisms are significantly different. In the air bubble system, only the pre-existing charges on the surface are involved. However, electrification in the water droplet system is dominated by triboelectric charges accumulated on the surface over time. An air bubble can produce a maximum of nine times more energy than a water droplet due to its advantages in terms of its geometry, hydrodynamics, and electro-circuitry. We also suggest an innovative approach to improve energy-harvesting efficiency using artificially embedded charges.</P>

Electrophoretic assembly and topological weaving of crumpled two-dimensional sheets with entangled defect loops

Wijewardhana, K. Rohana,Shen, Tian-Zi,Vengatesan, M.R.,Kim, Joosung,Lee, Hyoyoung,Song, Jang-Kun Elsevier 2017 Carbon Vol.119 No.-

<P>Transport, relocation, and self-assembly of nano and microparticles in colloidal systems are highly demanded in nanotechnology, photonics, microfluidics, and biotechnology; topological charges can provide an effective means for these purposes. We report that crumpled two-dimensional (2D) graphene oxide (GO) particle sheets in nematic fields can serve as a nest for complicated topological defect loops, which, in turn, provide mobility and inter-adhesiveness to the GO particles. The application of electric fields actuated the GO particles orthogonally, inducing their coalescence into large radial clusters upon absorption of other GO particles. In contrast, in the isotropic phase, where no topological defects existed, the GO particles electrostatically repelled each other owing to the presence of surface charges with equal sign. We also demonstrate that predesigned shallow surface trenches on a substrate can anchor seed GO particles, which attract other GO particles to create a macroscopic structure along the trench. (C) 2017 Elsevier Ltd. All rights reserved.</P>

Polyaniline supported nanocomposite cation exchanger: Synthesis, characterization and applications for the efficient removal of Pb2+ ion from aqueous medium

Rani Bushra,Mu. Naushad,Rohana Adnan,Zeid A. AlOthman,Mohd Rafatullah 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

Polyaniline Sn(IV) tungstomolybdate nanocomposite (PSTM) was synthesized by sol–gel method. Thephysico-chemical properties of PSTM were studied using FTIR, TGA, XRD, SEM, and TEM. The materialwas successfully used for the removal of Pb2+. Batch experiments were performed as a function of variousexperimental parameters such as effect of pH (2–8), contact time (5–60 min), initial Pb2+ concentration(10–30 mg L 1) and temperature (20–50 8C). The removal rate of Pb2+ using PSTM was fast andequilibrium established within 50 min. Kinetic studies showed better applicability for pseudo-firstordermodel. The values of thermodynamic parameters (DG8, DH8 and DS8) were also computed.

Association between household food insecurity and nutritional outcomes among children in Northeastern of Peninsular Malaysia

Ihab Ali Naser,Rohana Jalil,Wan Manan Wan Muda,Wan Suriati Wan Nik,Zalilah Mohd Shariff,Mohamed Rusli Abdullah 한국영양학회 2014 Nutrition Research and Practice Vol.8 No.3

BACKGROUND/OBJECTIVES: The purpose of the study was to investigate the relationship between household food insecurity and nutritional status of children in low-income households. A cross sectional study involved a survey of households (n = 223) receiving the financial assistance. SUBJECTS/METHODS: Eligible mothers that fulfilled the inclusion criteria such as non-pregnant, non-lactating mothers, aged 18 to 55 years with their youngest children aged 2 to 12 years, were purposively selected. The Radimer/Cornell hunger and food-insecurity instrument was administered and children’s height and weight were measured. RESULTS: About 16.1% of the households were food secure, while 83.9% experienced some kind of food insecurity. Out of food insecure category, 29.6% households were food insecure, 19.3% women were individual food insecure and 35.0% fell into the child hunger category. Education of the mother (P = 0.047), household size (P = 0.024), number of children (P = 0.024), number of children going to school (P = 0.048), total monthly income (P < 0.001), income per capital (P < 0.001), number of household members contributing to the income (P = 0.018) and food expenditure (P = 0.006) were significant risk factors for household food insecurity. The prevalence of underweight, stunting and wasting in children were 61.0%, 61.4% and 30.6% respectively. Based on multinomial logistic regression, children in food-insecure households were 2.15 times more likely to be underweight and three times to be stunted than children in the food-secure households. CONCLUSIONS: The findings suggest that household food insecurity is associated with the nutritional status of the children in the rural area of Northeastern Peninsular Malaysia.

Understanding Dieting and Previous Weight Loss Attempts among Overweight and Obese Participants: Insights into My Body Is Fit and Fabulous at Work Program

Tengku Alina Tengku Ismail,Rohana Abdul Jalil,Wan Rosli Wan Ishak,Noor Fadzlina Hamid,Wan Suriati Wan Nik,Hamid Jan Jan Mohamed,Nor Haslina Mohd,Wan Nor Arifin,Wan Mohd Izani Wan Mohamed,Mohd Ismail I 대한가정의학회 2018 Korean Journal of Family Medicine Vol.39 No.1

Background: A qualitative study providing an in-depth exploration of people’s view and the increasing burden of overweight and obesity is required. This study aimed to explore the understanding of dieting and previous experi-ences on weight loss attempts among overweight and obese government employees in Kelantan, Malaysia, prior to recruitment into the intervention program.Methods: Thirteen focus group discussions involving 129 participants from a weight-loss intervention program were conducted within the first 1 month of recruitment. These discussions were moderated by two trained re-searchers in the Malay language and assisted by an interview guide. They were audio-recorded and transcribed verbatim. A thematic analysis was performed, and codes and themes from each discussion were constructed.Results: The participants understood dieting with various meanings, including skipping meals and removing rice from daily diets. They applied numerous methods to lose weight and achieved various outcomes. Health and ap-pearance, social support, and compliance with current trends were the factors motivating these participants to lose weight. Their determination to lose weight was limited by lack of self-control and motivation, experiences of un-pleasant effects, influence on weight, and environmental and health factors.Conclusion: Real-life weight loss experiences and perceptions provided relevant insights into current weight loss management strategies. Some of these issues and misunderstandings should be emphasized in weight loss strate-gies during health promotion.