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Fulltext Heroin addiction: the past and future

Noor Zurani, M.H.R., Hussain, H., Rusdi, A.R., Muhammad Muhsin, A.Z.

Malaysian Journal of Psychiatry, 2008;17(2):1-6.
MyJurnal

Substance misuse, in particular heroin addiction contributes to health and social problems. Although effective medical treatment was available, earlier efforts confined the treatment of heroin addicts to in-house rehabilitation which required them to be estranged from the community and their families for 2 years. The in-house rehabilitative programme, implemented for at least three decades has produced low abstinence rates. On the other hand, being ‘away’ meant that many heroin addicts faced employment problems and family relationship difficulties upon completing the in-house rehabilitation. However, recently, the concerted efforts by various government and non-government organisations, and the acknowledgement that heroin addiction is a medical illness has resulted in a revamp to approaching treatment of heroin addiction. At present, methadone substitution programmes have been offered as part of treatment programme for heroin addicts in Malaysia. This new programme has been shown to be effective in treating heroin addiction and would need support and cooperation from all groups involved.
Fulltext Introduction to robotics agriculture in pest control: a review

Hassan, Ahmed, Abdul Shukor Juraimi, Muhammad Saiful Ahmad Hamdani

The Pertanika Journal of Scholarly Research Reviews, 2016;2(2):80-93.
MyJurnal

Agriculture is one of the latest industries that uses robotic technologies. Cultivation of crops
with high yield and quality can be enhanced when technological sustenance is involved. Pests are
nuisance and cannot be completely eliminated, but with effective control and management. damages
caused by pests could be minimized below economic threshold. Automation in agriculture is stable and
accurate and is mainly incorporated in mechanized farming system. However its numerous application in
different agricultural practices is not well noticed. Hence this paper attempts to provide profound
awareness on robotic technology in agriculture. Robots could have a specific or multiple functions and,
most commonly, they are made up of five basic components; sensors, effectors, actuators, controller and
arms. Use of automation in weeding, weed mapping, micro spraying, seeding, irrigation and harvesting
are progressions which promote sustainable agriculture and food security. In future, solar robots with
battery inverter may be invented.
Fulltext Utilization of Bracing Arms as Additional Reinforcement in Pultruded Glass Fiber-Reinforced Polymer Composite Cross-Arms: Creep Experimental and Numerical Analyses

Asyraf MRM, Ishak MR, Sapuan SM, Yidris N

Polymers (Basel), 2021 Feb 19;13(4).
PMID: 33669491 DOI: 10.3390/polym13040620

The application of pultruded glass fiber-reinforced polymer composites (PGFRPCs) as a replacement for conventional wooden cross-arms in transmission towers is relatively new. Although numerous studies have conducted creep tests on coupon-scale PGFRPC cross-arms, none had performed creep analyses on full-scale PGFRPC cross-arms under actual working load conditions. Thus, this work proposed to study the influence of an additional bracing system on the creep responses of PGFRPC cross-arms in a 132 kV transmission tower. The creep behaviors and responses of the main members in current and braced PGFRPC cross-arm designs were compared and evaluated in a transmission tower under actual working conditions. These PGFRPC cross-arms were subjected to actual working loads mimicking the actual weight of electrical cables and insulators for a duration of 1000 h. The cross-arms were installed on a custom test rig in an open area to simulate the actual environment of tropical climate conditions. Further creep analysis was performed by using Findley and Burger models on the basis of experimental data to link instantaneous and extended (transient and viscoelastic) creep strains. The addition of braced arms to the structure reduced the total strain of a cross-arm's main member beams and improved elastic and viscous moduli. The addition of bracing arms improved the structural integrity and stiffness of the cross-arm structure. The findings of this study suggested that the use of a bracing system in cross-arm structures could prolong the structures' service life and subsequently reduce maintenance effort and cost for long-term applications in transmission towers.
Occurrence of Enterocytozoon hepatopenaei (EHP) infection on Penaeus vannamei in one rearing cycle

Wan Sajiri WMH, Borkhanuddin MH, Kua BC

Dis Aquat Organ, 2021 Mar 11;144:1-7.
PMID: 33704087 DOI: 10.3354/dao03571

The microsporidian parasite Enterocytozoon hepatopenaei (EHP) is an emerging problem in the marine shrimp industry, primarily in Asian countries such as China, Thailand, India, Malaysia, Indonesia, and Vietnam. A screening was conducted to investigate the prevalence of EHP after a fixed period of culturing for 1 rearing cycle in 3 states of Malaysia. The screening stages covered Penaeus vannamei post larvae (PL) and after 14-30, 31-50, 51-70, and 71-90 d of culture in 1 production cycle. A total of 279 samples were amplified using a PCR assay targeting the gene encoding a spore wall protein (SWP) of EHP. The EHP infection was initially detected in the hatchery and increased to 96.6% after the shrimp were transferred to the pond. The positive EHP sequence showed 91 to 100% similarity to sequences from India, Thailand, Vietnam, Indonesia, and Latin America. EHP infection increased throughout 1 rearing cycle due to factors such as the cannibalistic feeding habits of shrimp and the presence of unknown vectors or carriers of EHP in the culture ponds. Hence, the finding from the current study will be fundamental for other studies concerning EHP.
Fulltext Evaluation of extra virgin olive oil adulteration with edible oils using ATR-FTIR spectroscopy

Nuraznee Mashodi, Nurul Yani Rahim, Norhayati Muhammad, Saliza Asman

Malaysian Journal of Applied Sciences, 2020;5(1):35-44.
MyJurnal

Extra virgin olive oil (EVOO) is categorized as expensive oil due to high-quality nutritional value. Unfortunately, EVOO is easily adulterated with other low-quality edible oils. Therefore, this study was done to differentiate and analyze the adulteration of EVOO with other edible oils using Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy. The study was used several edible oils included canola oil, corn oil, sunflower oil, and soybean oil as an adulterant for EVOO. The adulterant EVOO samples were prepared by mixing with dissimilar concentrations of the solely edible oils (20 %, 40 %, 60 % and 80 % (v/v)). The main functional groups of EVOO and other edible oils are O-H, C-H, C=C and C=O groups were assigned around 3500 cm-1, 2925 cm-1, 3006 cm-1 and 1745 cm-1 wavenumbers, respectively. From the comparison of EVOO and other adulterant edibles oil spectra, it showed that the EVOO has the lowest absorbance intensity at around 3006 cm-1 represented double bond which is closely related to the composition of oil sample. The adulteration of EVOO was evaluated by analysing the changes in the absorbance based on the linear regression analysis graph of the bands at 3006 and 2925 cm-1 and the limit of detection (LOD) was measured. The graph of A3008/A2925 with good relative coefficients (R2) and lower LOD is more favourable than the linear regression graph of A3006 versus percentage of edible oils added in EVOO. This study showed that ATR-FTIR spectroscopy is a convenient tool for analysing the adulteration of EVOO.
Fulltext Hematocrit change as a predictor of readmission for decompensated heart failure: a retrospective single centre study

Zulastri MAM, Hafidz MI, Ismail MD, Zuhdi ASM

Rev Cardiovasc Med, 2021 Jun 30;22(2):505-512.
PMID: 34258919 DOI: 10.31083/j.rcm2202058

In patients with acute heart failure (AHF), hemoconcentration has been suggested as a surrogate for volume changes (AHF). However, literatures comparing the outcome of AHF patients that achieved hemoconcentration during hospitalization with those that do not are limited. The aim of this research is to see if achieving hemoconcentration prior to discharge is linked to a lower risk of re-admission in AHF patients. 124 patients hospitalized in the Cardiology Unit, University Malaya Medical Centre (UMMC) for AHF between November 2019 and November 2020 were enrolled. Information on patients' clinical characteristics, laboratory values and in-hospital treatments were collected through electronic medical record. At admission and discharge, the change in hematocrit (HCT) levels was calculated, and patients were stratified based on two quantiles of delta HCT, either discharged with hemoconcentration (ΔHCT >1.5%) or without hemoconcentration (ΔHCT ≤1.5%). The study's outcome was AHF readmission after a 90-day follow-up period. Readmission was significantly associated with ejection fraction (p = 0.032) and HCT change (p = 0.005). Consecutively, logistic regression performed revealed that patients with haemoconcentration were 78.3% less likely to be readmitted than those without haemoconcentration (OR = 0.217, p = 0.003, 95% CI = 0.078-0.605) and Patients with a lower ejection fraction have a threefold greater chance of being readmitted than those with a preserved ejection fraction (OR = 3.316, p = 0.022, 95% CI = 1.188-9.256). In conclusion, among patients hospitalized and discharged for AHF, those that (i) do not achieve haemoconcentration and (ii) patients with a reduced ejection fraction were more likely to be readmitted with acute heart failure. Therefore, optimising patients' haematocrit levels prior to discharge may potentially reduce rehospitalizations among heart failure patients.
Fulltext Correction: The Fast Health Interoperability Resources (FHIR) Standard: Systematic Literature Review of Implementations, Applications, Challenges and Opportunities

Ayaz M, Pasha MF, Alzahrani MY, Budiarto R, Stiawan D

JMIR Med Inform, 2021 Aug 17;9(8):e32869.
PMID: 34403353 DOI: 10.2196/32869

[This corrects the article DOI: 10.2196/21929.].
Fulltext Social & behavioral risk factors and early childhood caries – a cross-sectional study on preschool children in Shah Alam

Norashikin,Yusof,, Luqman,Arif,Muhammad,Ghazali,, Nur,Shahirah,Zulkifle,

Compendium of Oral Science, 2021;8(1):12-17.
MyJurnal

ABSTRACT
Introduction: Early childhood caries (ECC) remains a major challenge among the 5-6 year olds in Malaysia
with a caries prevalence of 71.3% as indicated in the last survey of preschool children in 2015. Studies have
shown that behavior and income status can influence development of ECC. Objectives: The aim of this study
was to measure the caries prevalence among 2 – 5 years old preschool children and to study the association of
parents’ socio behavioral factors on ECC. Materials and methods: 140 preschool children participated in this
study. Parents were given a set of structured questionnaires and oral examination was conducted on their children
after receiving consent. Results: Findings showed prevalence of dental caries was 50.1% with mean dft score
of 2.51. There was significant association between dental caries and children drinking formula milk and sweet
drinks in their bottles: (p
Fulltext Prevalence of Pediculosis and Its Predictors among Urban Primary School Children in Kuantan, Pahang

Muhammad Rusyaidi Azali, Nor Faiza Mohd Tohit,, Razman Mohd Rus

IIUM Medical Journal Malaysia, 2019;18(102):28-0.
MyJurnal

Pediculosis capitis among primary school children is always known as the problem of the lower socio-economic class and rural communities. It carries significant consequences to the school children and caregivers. Limited studies have been conducted among the urban populations. Thus, this study aims to investigate the prevalence and predictors of Pediculosis capitis among Urban primary school children in Kuantan. Materials and method: An analytical cross-sectional study using cluster random sampling was carried out in Kuantan, Pahang, Malaysia. A selfadministered validated questionnaire was issued to the participants with purpose to collect socio-demographic data related to age, gender and factors that associated with head lice infestations among primary school children from standard one to six. It was then followed by hair and scalp examination by a well-trained examiners to check the infestation status. The results were analyzed using the chi-squared test and logistic regression analysis. Results: A total of 1347 students from 5 schools were included in this study. Majority of them were males (53.6%), Malays (61.0%), household income between RM1000-RM2999 (32.1%). The overall prevalence was 9.1% (n=122). Multivariate analysis showed that predictors for pediculosis capitis were female gender (OR= 6.02, 95% CI= 2.97-12.21), Indian ethnicity (OR= 5.55 , 95% CI=3.26-9.45), sibling of more than 5 (OR= 2.72 , 95% CI=1.04-7.12) and contact with infested person (OR=2.42, 95% CI=1.58-3.71). Conclusion: The prevalence of Pediculosis capitis among urban primary school children in Kuantan, Pahang is endemic (9.1%) and predictors are female genders, Indian ethnicity, having siblings of more than 5 and contact with infested person. Hence, preventive measures are necessary to reduce the transmission of head lice among school children.
Fulltext Effectiveness of Smartphone Application in Improving Knowledge on Under-Five Childhood Immunization Schedule amongst Parents in Selected Nurseries

Mohammad Farhan Rusli, Nor Afiah Mohd Zulkefli, Muhammad Hanafiah Juni

IIUM Medical Journal Malaysia, 2019;18(102):2-0.
MyJurnal

Knowledge on under-five childhood immunization has been identified as a key factor in determining understanding and compliance to the schedule. Understanding the current levels of knowledge and introducing a health intervention to improve the level will benefit the population to be healthier and reduce morbidity. Materials and Method: A quasi-experimental study was conducted in nurseries in Putrajaya and Cyberjaya, Malaysia from January 2016 to January 2018. 98 respondents from Putrajaya were given the technology based intervention and 98 from Cyberjaya were the wait-listed control group. Respondents answered a validated, self-administered questionnaire at baseline, immediate post-intervention and 3 months post-intervention that were specifically targeted to examine their levels of knowledge on under five childhood intervention. Results: Data was analysed using Statistical Package for Social Science (SPSS) Version 23. The level of knowledge at baseline was 58.9% for the intervention group and 61.7% for the control group with no significant difference between both groups (p=0.651). Immediate post intervention showed a significant difference (p
Fulltext Systematic Review on The Effectiveness of Using Carbon Monoxide Measurement in Smoking Cessation Interventio

Muhammad Adil Zainal Abidin,, Hayati Kadir @ Shahar, Rosliza Abdul Manaf

IIUM Medical Journal Malaysia, 2019;18(102):52-0.
MyJurnal

Carbon monoxide measurement is one of the biomedical risk assessments in smoking cessation. With the advancement in medical devices, risk assessment among smoker using carbon monoxide can be an effective intervention for quit smoking. A systematic review was conducted on the effectiveness of using carbon monoxide measurement in smoking cessation intervention. Material and methods: A systematic review and narrative synthesis were done using PRISMA guideline. A broad database search on English literature was conducted including Medline, PubMed, Scopus and Science Direct from 2008 till 2017. Additional studies were also searched through snowballing technique by searching the bibliographies of selected studies. Five studies met the criteria with two studies were done in clinical settings while the other was done at population settings. The studies were conducted in the United States of America, United Kingdom and South Korea. All study were two-arm randomized controlled trials with variation in the outcome measurement mainly intention to quit, quit attempt and smoking abstinence. There was also variation in the duration of follow up ranging from 1 week to 12 months. Results: Only three studies found statistically significant increased in motivation or intention to quit smoking but only at 1 month follow up. All five study found no significant difference in frequency of quit attempt or smoking abstinence. Most of the studies recruited participants based on voluntary participation thus limiting the generalizability of the results. Conclusions: The present review has found limited studies on the effect of carbon monoxide measurement intervention for quit smoking. It may only be beneficial at the motivational level and not translated into behavioural changes. However, the effect too was short term and not sustained in the long term.
Fulltext A Comparative Study on Suitability of Model-Free and Model-Fitting Kinetic Methods to Non-Isothermal Degradation of Lignocellulosic Materials

Mahmood H, Shakeel A, Abdullah A, Khan MI, Moniruzzaman M

Polymers (Basel), 2021 Jul 29;13(15).
PMID: 34372105 DOI: 10.3390/polym13152504

The thermal kinetic modeling is crucial for development of sustainable processes where lignocellulosic fuels are a part of chemical system and their thermal degradation eventuates. In this paper, thermal decomposition of three lignocellulosic materials (bagasse, rice husk, and wheat straw) was obtained by the thermogravimetric (TG) technique and kinetics was analyzed by both model-fitting and isoconversional (model-free) methods to compare their effectiveness. Two models selected from each class include Arrhenius and Coats-Redfern (model-fitting), and Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) (model-free). The formal model-fitting approach simulating the thermal decomposition of solids by assuming a fixed mechanism was found to be unduly facile. However, activation energy (E) values calculated from two model-fitting techniques were considerably different from each other with a percentage difference in the range of 1.36% to 7.65%. Particularly, both model-fitting methods predicted different reaction mechanism for thermal disintegration of lignocellulosic materials (two-dimensional diffusion (D2) by Arrhenius and one-dimensional diffusion (D1) by Coat-Redfern method). Conversely, the model-free routine offers a transformation of mechanism and activation energy values throughout reaction and is, therefore, more authentic to illustrate the complexity of thermal disintegration of lignocellulosic particles. Based on the model-free kinetic analysis, the lignocellulosic materials may be devised in following order of activation energy: rice husk > bagasse > wheat straw, by both KAS and FWO methods with a percentage difference no more than 0.84% for fractional conversion up to 0.7. Isoconversional approach could be recommended as more realistic and precise for modeling non-isothermal kinetics of lignocellulosic residues compared to model-fitting approach.
Fulltext Review on the Control of Waterborne Diseases –The Islamic Approach.

Muhammad Lokman Md Isa, Afzan Mat Yusof, Mohammed Abdullah Jainul

IIUM Medical Journal Malaysia, 2018;17(102):137-140.
MyJurnal

Introduction: Scarcity of fresh water is currently blighting the population of the least developed countries around the world. According to WHO, waterborne diseases accounts for 4.1% of total disability adjusted life years (DALYs) with a mortality rate of 1.8 million per year. Numerous pathogens and chemicals may be the potential sources of water contamination that leads to waterborne diseases in humans. Some pathogens are only active and express disease whilst within the host. The aim of this article is to identify the cause of water-borne diseases and how to control it from the Islamic perspective. Material and Methods: In this review we had compiled the latest scientific findings related to waterborne diseases and integrated them with Islamic approach of cleanliness. There are many Hadithsof the Prophet (peace be upon him) (PBUH) regarding methods of cleanliness with scientific background to control waterborne diseases. Water pollution may be a natural process, men made, intentional or accidental. More often than not, man are infected after accidently consuming or coming in contact with contaminated water Results: Scientific literature search reveals that individual hygiene and sanitation is the most prominent way to prevent waterborne diseases. In Islam, Prophet Muhammad (PBUH) puts a great emphasize on purification in terms of personal cleanliness and made it mandatory to follow rule to remain pure both physically and spiritually. Conclusions: Sunnaticapproaches of cleanliness may hinder waterborne disease.
Fulltext The Fast Health Interoperability Resources (FHIR) Standard: Systematic Literature Review of Implementations, Applications, Challenges and Opportunities

Ayaz M, Pasha MF, Alzahrani MY, Budiarto R, Stiawan D

JMIR Med Inform, 2021 07 30;9(7):e21929.
PMID: 34328424 DOI: 10.2196/21929

BACKGROUND: Information technology has shifted paper-based documentation in the health care sector into a digital form, in which patient information is transferred electronically from one place to another. However, there remain challenges and issues to resolve in this domain owing to the lack of proper standards, the growth of new technologies (mobile devices, tablets, ubiquitous computing), and health care providers who are reluctant to share patient information. Therefore, a solid systematic literature review was performed to understand the use of this new technology in the health care sector. To the best of our knowledge, there is a lack of comprehensive systematic literature reviews that focus on Fast Health Interoperability Resources (FHIR)-based electronic health records (EHRs). In addition, FHIR is the latest standard, which is in an infancy stage of development. Therefore, this is a hot research topic with great potential for further research in this domain.
OBJECTIVE: The main aim of this study was to explore and perform a systematic review of the literature related to FHIR, including the challenges, implementation, opportunities, and future FHIR applications.
METHODS: In January 2020, we searched articles published from January 2012 to December 2019 via all major digital databases in the field of computer science and health care, including ACM, IEEE Explorer, Springer, Google Scholar, PubMed, and ScienceDirect. We identified 8181 scientific articles published in this field, 80 of which met our inclusion criteria for further consideration.
RESULTS: The selected 80 scientific articles were reviewed systematically, and we identified open questions, challenges, implementation models, used resources, beneficiary applications, data migration approaches, and goals of FHIR.
CONCLUSIONS: The literature analysis performed in this systematic review highlights the important role of FHIR in the health care domain in the near future.
Stimulation of Innate and Adaptive Immune Cells with Graphene Oxide and Reduced Graphene Oxide Affect Cancer Progression

Yunus MA, Ramli MM, Osman NH, Mohamed R

Arch Immunol Ther Exp (Warsz), 2021 Jul 29;69(1):20.
PMID: 34327598 DOI: 10.1007/s00005-021-00625-6

Sole nanomaterials or nanomaterials bound to specific biomolecules have been proposed to regulate the immune system. These materials have now emerged as new tools for eliciting immune-based therapies to treat various cancers. Graphene, graphene oxide (GO) and reduced GO (rGO) are the latest nanomaterials among other carbon nanotubes that have attracted wide interest among medical industry players due to their extraordinary properties, inert-state, non-toxic and stable dispersion in a various solvent. Currently, GO and rGO are utilized in various biomedical application including cancer immunotherapy. This review will highlight studies that have been carried out in elucidating the stimulation of GO and rGO on selected innate and adaptive immune cells and their effect on cancer progression to shed some insights for researchers in the development of various GO- and rGO-based immune therapies against various cancers.
Fulltext Effect of small-sided games rule changes on time spent in different intensity zones, frequency of technical actions and distance covered during soccer training

Muhammad Taufiq Cheng Abdullah, Kok, Lian-Yee, Chee, Chen-Soon

Movement Health & Exercise, 2020;9(2):71-84.
MyJurnal

Purpose: The efficacy of SSGs has been difficult to assess as researchers have used a wide-ranging number of players, pitch dimensions and game rules, making comparisons complicated. Therefore, this study compared four SSG rules [one (SSG1T), two (SSG2T), three (SSG3T), and unlimited touches (SSGFT)] on time spent in different heart-rate (HR) intensity zones, frequency of technical actions and distance covered involving the starting 11 players and the reserve goalkeeper of a national soccer league team. Methods: The participants (age: 24.3±4.0 yr; height: 171.2±5.9 cm: weight: 61.9±7.4 kg) were measured for previously mentioned dependent variables during each SSG format. Results: Analysis found no significant difference among the four SSGs formats [F(3, 27) = 2.897, p = .053] for time spent in the low-intensity zone, but significant differences were observed for time spent in moderate [F(3, 27) = 13.642, p = .001] and high [F(3, 27) = 13.431, p = .001] intensity zones. Significantly more time was spent in the high intensity zone [F(3, 27) = 13.431, p = .001] when players performed SSG2T and SSGFT when compared SSG1T (p = .002 and p = .009) respectively. SSG1T induced most unsuccessful passing [F(3,27) = 500.498, p = .001] but no differences was observed among SSG2T, SSG3T and SSGFT. SSG2T, SSG3T and SSG3T obtained significantly more shots on goal shots on goal [F(3,27) = 25.398, p = .001], with SSGFT achieving higher numbers than the other three formats. There were no significant differences in goals scored (p = .537) and distance covered (p = 0.574) for all SSG formats. Conclusion: The main findings of this study revealed that all four SSG formats stimulated moderate to high heart rate intensities that could induce positive aerobic and anaerobic adaptations depending on frequency of technical actions and players’ skill level. Therefore, coaches could select specific SSG formats to help players achieved intended intensity and technical objectives programmed for different phases of periodized training.
Fulltext A new Multi Sine-Cosine algorithm for unconstrained optimization problems

Rehman MZ, Khan A, Ghazali R, Aamir M, Nawi NM

PLoS One, 2021;16(8):e0255269.
PMID: 34358237 DOI: 10.1371/journal.pone.0255269

The Sine-Cosine algorithm (SCA) is a population-based metaheuristic algorithm utilizing sine and cosine functions to perform search. To enable the search process, SCA incorporates several search parameters. But sometimes, these parameters make the search in SCA vulnerable to local minima/maxima. To overcome this problem, a new Multi Sine-Cosine algorithm (MSCA) is proposed in this paper. MSCA utilizes multiple swarm clusters to diversify & intensify the search in-order to avoid the local minima/maxima problem. Secondly, during update MSCA also checks for better search clusters that offer convergence to global minima effectively. To assess its performance, we tested the MSCA on unimodal, multimodal and composite benchmark functions taken from the literature. Experimental results reveal that the MSCA is statistically superior with regards to convergence as compared to recent state-of-the-art metaheuristic algorithms, including the original SCA.
Optimization of Progressive Freezing for Residual Oil Recovery from a Palm Oil-Water Mixture (POME Model)

Anuar MAM, Amran NA, Ruslan MSH

ACS Omega, 2021 Feb 02;6(4):2707-2716.
PMID: 33553888 DOI: 10.1021/acsomega.0c04897

Oil and grease remain the dominant contaminants in the palm oil mill effluent (POME) despite the conventional treatment of POME. The removal of residual oil from palm oil-water mixture (POME model) using the progressive freezing process was investigated. An optimization technique called response surface methodology (RSM) with the design of rotatable central composite design was applied to figure out the optimum experimental variables generated by Design-Expert software (version 6.0.4. Stat-Ease, trial version). Besides, RSM also helps to investigate the interactive effects among the independent variables compared to one factor at a time. The variables involved are coolant temperature, XA (4-12 °C), freezing time, XB (20-60 min), and circulation flow, XC (200-600 rpm). The statistical analysis showed that a two-factor interaction model was developed using the obtained experimental data with a coefficient of determination (R2) value of 0.9582. From the RSM-generated model, the optimum conditions for extraction of oil from the POME model were a coolant temperature of 6 °C in 50 min freezing time with a circulation flowrate of 500 rpm. The validation of the model showed that the predicted oil yield and experimental oil yield were 92.56 and 93.20%, respectively.
Fulltext Mapping healthy aisles in Makassar city, Indonesia: implications for community empowerment

Palutturi S, Saleh LM, Rachmat M, Malek JA

Gac Sanit, 2021 4 10;35 Suppl 1:S42-S45.
PMID: 33832624 DOI: 10.1016/j.gaceta.2020.12.012

OBJECTIVE: The purpose of this paper was to map healthy aisles in Makassar City and how its implication is for community empowerment.
METHOD: This research was a descriptive survey. One hundred and sixty aisles in Rappocini and Ujung Tanah Sub-Districts, Makassar were surveyed.
RESULTS: The development of healthy aisles is under maintenance of Puskesmas (Public Health Center) consisting of 20 aisles of 117 aisles in Puskesmas Kassi-Kassi and 3 aisles of 43 aisles in Puskesmas Pattingalloang. Ten healthy aisles indicators were established: aisles's cleanliness, beauty, drainage, garbage transportation, utilization, Siskamling (neighborhood security system), Non-Smoking Area (Kawasan Tanpa Rokok=KTR), active Posyandu (Integrated Health Post), the presence of educational media and the existence of working groups (Pokja).
CONCLUSIONS: Based on 10 healthy aisles indicators, aspects of beauty, educational media, and aisles work group activity need to be strengthened, while others need to be maintained and even improved.
Fulltext Computational analysis of fluid flow past a bluff body at low Reynolds number in different apex angle

Jusoh, M.Z.M., Nur Ain, A.R, Muhammad Wafi Md Nor

ESTEEM Academic Journal, 2020;16(2):65-74.
MyJurnal

A computational fluid dynamic analysis (CFD) is presented in the study of low Reynolds number fluid flow moving past bluff bodies. The study is focusing on the understanding of the effects of the apex-angles orientation on the flow structure and related occurring force. The apex-angle both facing upstream and downstream were computationally investigated. The simulation results of the cylinder solid are compared with available experimental data to justify the results and the model used. Results obtained in the present work were Strouhal number, drag coefficient, and Fast Fourier Transform (FFT). The study had found that the value of the drag force is increasing directly proportional to the apex angle. In contrast, the value of Strouhal number inversely proportional to the increasing of the apex angle. This was due to the flow over a cylinder creating a vortex shedding in the wake region which influenced the flow separation of fluid. Through the changing on orientation of the apex angle, it was also found that the characteristic linear dimension of the geometry will also be changed, thus affecting the flow pattern.

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