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Alias Ahmad Nabeil,Mokti Khalid,Ibrahim Mohd Yusof,Saupin Sahipudin,Madrim Mohd Faizal 대한가정의학회 2023 Korean Journal of Family Medicine Vol.44 No.6
Elderly abuse and neglect are among the primary public health problems linked to global demographic changes in the population, impacting not only the well-being of the elderly but also the growth of the nation or economy. This article discusses the effects of elder abuse and neglect on population health from the national and international perspectives through a narrative review of previously published articles on the concept of aging, the prevalence of elderly abuse and neglect, its risk factors and effects, and finally measures, legal perspectives, and recommenda-tions to curb it. Interventions in Malaysia and selected nations, including Indonesia, South Korea, the United States, Australia, and Hong Kong, are examined. This issue is important as the majority of countries are moving toward be-ing elderly populations. Improving global surveillance and the monitoring of instances is essential to inform policy actions to prevent elder abuse. In addition, a thorough assessment of the identified risk factors for violence and steps to prevent violence is required.
Alias, Azrita,Rahim, Nasrudin Abd.,Hussain, Mohamed Azlan The Korean Institute of Power Electronics 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.5
The modified sinusoidal pulse-width modulation (SPWM) is one of the PWM techniques used in three-phase AC-DC buck converters. The modified SPWM works without the current sensor (the converter is current sensorless), improves production of sinusoidal AC current, enables obtainment of near-unity power factor, and controls output voltage through modulation gain (ranging from 0 to 1). The main problem of the modified SPWM is the huge starting current and voltage (during transient) that results from a large step change from the reference voltage. When the load changes, the output voltage significantly drops (through switching losses and non-ideal converter elements). The single-input single-output (SISO) approach with minor-loop voltage feedback controller presented here overcomes this problem. This approach is created on a theoretical linear model and verified by discrete-model simulation on MATLAB/Simulink. The capability and effectiveness of the SISO approach in compensating start-up current/voltage and in achieving zero steady-state error were tested for transient cases with step-changed load and step-changed reference voltage for linear and non-linear loads. Tests were done to analyze the transient performance against various controller gains. An experiment prototype was also developed for verification.
( Alias Khalaf ),( Balasubramaniyan Jaya Bharathi ),( Neelamegarajan Rajesh ) 한국수학교육학회 2023 純粹 및 應用數學 Vol.30 No.3
The aim of this paper is to study the concept of s-topological d-algebras which is a d-algebra supplied with a certain type of topology that makes the binary operation defined on it d-topologically continuous. This concept is a generalization of the concept of topological d-algebra. We obtain several properties of s-topological d-algebras.
Azrita Alias,Nasrudin Abd. Rahim,Mohamed Azlan Hussain 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.5
The modified sinusoidal pulse-width modulation (SPWM) is one of the PWM techniques used in three-phase AC?DC buck converters. The modified SPWM works without the current sensor (the converter is current sensorless), improves production of sinusoidal AC current, enables obtainment of near-unity power factor, and controls output voltage through modulation gain (ranging from 0 to 1). The main problem of the modified SPWM is the huge starting current and voltage (during transient) that results from a large step change from the reference voltage. When the load changes, the output voltage significantly drops (through switching losses and non-ideal converter elements). The single-input single-output (SISO) approach with minor-loop voltage feedback controller presented here overcomes this problem. This approach is created on a theoretical linear model and verified by discrete-model simulation on MATLAB/Simulink. The capability and effectiveness of the SISO approach in compensating start-up current/voltage and in achieving zero steady-state error were tested for transient cases with step-changed load and step-changed reference voltage for linear and non-linear loads. Tests were done to analyze the transient performance against various controller gains. An experiment prototype was also developed for verification.
Qadir Bux alias Imran Latif,Ismail Abdul Rahman,Ahmad Mujahid Ahmad Zaidi,Kamran Latif 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.1
Penetration is the basic element of designing protective concrete structure against the local impact damage of hard missile. Impactenergy is the dominant cause of damage in moving accidents. When hard projectile collides with concrete target, it is the impactenergy of the projectile that makes concrete target to deform. Therefore, it is vital to study critical impact energy required to causespenetration. An analytical model is developed to predict the required critical impact energy for maximum penetration without reareffects in concrete slabs when it is impacted with hard projectile. The nose shape factor Ni also has been introduced with inclusion ofempirical friction factor Nf, as modification in Chen & Li nose shape factor for ogive nose hard projectile. The newly developedanalytical model and nose shape factor Ni is examined for CRH = 2.0, CRH = 3.0, and CRH = 4.25. It was found that the predictedresults from analytical model with nose shape Ni are in close relation with experimental data in all cases as compared to predictedresults with traditional Li and Chen nose shape N*. In, General, the analytical model generates encouraging prediction which isconsistent and follows a general trend of experimental results.
M. Anwar Alias,Khalida Muda,Augustine Chioma Affam,Azmi Aris,Normala Hashim 대한환경공학회 2017 Environmental Engineering Research Vol.22 No.1
This study investigated the effect of various cations (Ca<SUP>2+</SUP>, Mg<SUP>2+</SUP>, Al<SUP>3+</SUP>, Mn<SUP>2+</SUP>, Zn<SUP>2+</SUP>) on the autoaggregation (AAg) and surface hydrophobicity (SHb) of three different bacteria (Brevibacillus panacihumi strain (ZB1), Lysinibacillus fusiformis strain (ZB2) and Enterococcus faecalis strain (ZL)) using a 2-level factorial design. The AAg ratio was measured from the changes in the absorbance of the media. Results show that ZB2 had maximum AAg for the three bacteria investigated. A microscopic clustering of cells was observed when Ca<SUP>2+</SUP> was added to ZB2. The AAg was in the range of 62%, 58% and 34% for ZB2, ZB1 and ZL, respectively and correlated to the SHb. The aggregation and SHb of the microbial cells increased with increasing ionic strength due to the repulsive steric or overlap forces between the polymer covered surfaces. Ca<SUP>2+</SUP> demonstrated a more significant effect on aggregation and SHb of microbial cells due to an attractive binding force.
Influence of Filler Loading on Properties of Polyvinyl Alcohol and Eggshell Powder Biocomposite
Nur Fazreen Alias,Hanafi Ismail 한국고분자학회 2021 폴리머 Vol.45 No.2
Biocomposite films made up of polyvinyl alcohol (PVA) and eggshell powder (ESP) were prepared by solution casting method. The physical propertiess, mechanical properties and biodegradability of biocomposites were studied based on various ESP loading (0 to 40 wt%). From raw material characterization, ESP was found to have similar composition to the calcium carbonate, which is widely used as filler in polymer composites. It was found that the tensile properties decreased with increasing ESP loading, attributed from poor interfacial adhesion and ESP agglomeration as proven by field emission scanning electron microscope (FE-SEM) micrographs. Water absorption and water vapour transmission were enhanced with addition of ESP. The biocomposite shows higher biodegradability in both soil burial and natural weathering with increasing ESP loading.
Profiling Bartonella infection and its associated risk factors in shelter cats in Malaysia
Nurul Najwa Ainaa Alias 대한수의학회 2023 Journal of Veterinary Science Vol.24 No.3
Background: Poor disease management and irregular vector control could predispose sheltered animals to disease such as feline Bartonella infection, a vector-borne zoonotic disease primarily caused by Bartonella henselae. Objectives: This study investigated the status of Bartonella infection in cats from eight (n = 8) shelters by molecular and serological approaches, profiling the CD4:CD8 ratio and the risk factors associated with Bartonella infection in shelter cats. Methods: Bartonella deoxyribonucleic acid (DNA) was detected through polymerase chain reaction (PCR) targeting 16S-23S rRNA internal transcribed spacer gene, followed by DNA sequencing. Bartonella IgM and IgG antibody titre, CD4 and CD8 profiles were detected using indirect immunofluorescence assay and flow cytometric analysis, respectively. Results: B. henselae was detected through PCR and sequencing in 1.0% (1/101) oral swab and 2.0% (1/50) cat fleas, while another 3/50 cat fleas carried B. clarridgeiae. Only 18/101 cats were seronegative against B. henselae, whereas 30.7% (31/101) cats were positive for both IgM and IgG, 8% (18/101) cats had IgM, and 33.7% (34/101) cats had IgG antibody only. None of the eight shelters sampled had Bartonella antibody-free cats. Although abnormal CD4:CD8 ratio was observed in 48/83 seropositive cats, flea infestation was the only significant risk factor observed in this study. Conclusions: The present study provides the first comparison on the Bartonella spp. antigen, antibody status and CD4:CD8 ratio among shelter cats. The high B. henselae seropositivity among shelter cats presumably due to significant flea infestation triggers an alarm of whether the infection could go undetectable and its potential transmission to humans.