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Fulltext Synergetic Effect of Surfactant Concentration, Salinity, and Pressure on Adsorbed Methane in Shale at Low Pressure: An Experimental and Modeling Study

Abdulelah H, Negash BM, Yekeen N, Al-Hajri S, Padmanabhan E, Al-Yaseri A

ACS Omega, 2020 Aug 18;5(32):20107-20121.
PMID: 32832765 DOI: 10.1021/acsomega.0c01738

The influence of an anionic surfactant, a cationic surfactant, and salinity on adsorbed methane (CH4) in shale was assessed and modeled in a series of systematically designed experiments. Two cases were investigated. In case 1, the crushed Marcellus shale samples were allowed to react with anionic sodium dodecyl sulfate (SDS) and brine. In case 2, another set of crushed Marcellus shale samples were treated with cetyltrimethylammonium bromide (CTAB) and brine. The surfactant concentration and salinity of brine were varied following the Box-Behnken experimental design. CH4 adsorption was then assessed volumetrically in the treated shale at varying pressures (1-50 bar) and a constant temperature of 30 °C using a pressure equilibrium cell. Mathematical analysis of the experimental data yielded two separate models, which expressed the amount of adsorbed CH4 as a function of SDS/CTAB concentration, salinity, and pressure. In case 1, the highest amount of adsorbed CH4 was about 1 mmol/g. Such an amount was achieved at 50 bar, provided that the SDS concentration is kept close to its critical micelle concentration (CMC), which is 0.2 wt %, and salinity is in the range of 0.1-20 ppt. However, in case 2, the maximum amount of adsorbed CH4 was just 0.3 mmol/g. This value was obtained at 50 bar and high salinity (∼75 ppt) when the CTAB concentration was above the CMC (>0.029 wt %). The findings provide researchers with insights that can help in optimizing the ratio of salinity and surfactant concentration used in shale gas fracturing fluid.

Matched MeSH terms: Research Design
Fulltext Acceptability and Feasibility of Online, Asynchronous Photovoice with Key Populations and People Living with HIV

Earnshaw VA, Cox J, Wong PL, Saifi R, Walters S, Azwa I, et al.

AIDS Behav, 2023 Jul;27(7):2055-2069.
PMID: 36463390 DOI: 10.1007/s10461-022-03938-5

Photovoice is an action-oriented qualitative method involving photography and story-telling. Although photovoice yields a powerful form of data that can be leveraged for research, intervention, and advocacy, it has arguably been underutilized within HIV research. Online, asynchronous photovoice methods represent a promising alternative to traditional in-person methods, yet their acceptability and feasibility with key populations and people living with HIV (PLWH) have yet to be explored. The current study describes the methods and evaluation of an online, asynchronous photovoice project conducted with 34 members of key populations and PLWH in Malaysia in 2021. A HIPAA-compliant website incorporating a series of instructional videos was created to facilitate participant engagement and data collection. Quantitative and qualitative indicators suggest that participants found the project to be highly acceptable and feasible. Online, asynchronous photovoice methods hold potential for increasing the scale of this powerful and versatile qualitative research method with key populations and PLWH.

Matched MeSH terms: Research Design
Changes in Thai sexual behavior lower HIV spread

AIDS Wkly Plus, 1997 Jun 2.
PMID: 12347937
Matched MeSH terms: Research Design
Indonesia and Vietnam may face AIDS pandemic

AIDS Wkly Plus, 1996 Oct 28.
PMID: 12320487
Matched MeSH terms: Research Design
Migrant workers spreading HIV in Southeast Asia

AIDS Wkly Plus, 1996 Oct 21.
PMID: 12320478
Matched MeSH terms: Research Design
Fulltext Impact of medical student well-being workshop on the medical students’ stress level: a preliminary study

Ahmad Fuad Abdul Rahim, Muhamad Saiful Bahri Yusoff

ASEAN Journal of Psychiatry, 2010;11(1):56-63.
MyJurnal

Objective: Medical training has always been regarded as a highly stressful environment to students. This article described a preliminary data on impact of a stress-management programme on medical students’ stress level. Methods: This is a quasi-experimental before after comparison study design. The programme was run over half-day and convenient sampling method was applied. Sample size as calculated for this preliminary study was 38. The 12 items General Health Questionnaire (GHQ-12) was administered prior to the
programme and four months later. Data was analysed using SPSS version 12. Results: 34 participants were involved in this study. This study found that there was a significant difference in participants’ GHQ-12 scores before and after the programme (p

Matched MeSH terms: Research Design
Fulltext Investigating the relationship between post- traumatic stress disorder (PTSD) symptoms and emotional intelligence among adolescent refugees from the Middle East

Siti Raudzah Ghazali

ASEAN Journal of Psychiatry, 2014;15(2):220-224.
MyJurnal

Objective: The objective of this study was to establish the relationship between symptoms of PTSD and various scores of emotional intelligence scales. This study employed a cross-sectional research design. Participants were recruited from the local community health centre in Dearborn, Michigan, USA. The Child Posttraumatic Stress Reaction Index (CPTS-RI) measured the presence of PTSD symptoms and the Adolescents Multifactor Emotional Intelligence Scale (AMEIS) measured emotional intelligence. Results: The findings suggest an inverse relationship between PTSD severity and emotional intelligence. The PTSD score was negatively correlated with all AMEIS subscales. Two significant negative correlations were found in the tasks of using emotion and understanding emotion. Conclusion: Findings suggest that individuals with severe PTSD symptoms appear to lack the abilities to understand and use emotions. These findings might be useful in identifying factors that may contribute to decreasing the severity of PTSD symptoms of these children. Implications of the findings were discussed, and recommendations for future research are presented. ASEAN Journal of Psychiatry, Vol. 15 (2), July - December 2014: 220-224.

Matched MeSH terms: Research Design
Fulltext Coping styles and Stroop test in non-clinical sample: exploring the associations and predictors of cognitive styles

Chang, Teo Yong, Nasir Yusoff, Begum, Tahamina

ASEAN Journal of Psychiatry, 2015;16(1):75-83.
MyJurnal

Objective: Literatures on factors influencing performance of the Stroop interference have been elusive on coping styles. Past investigations of coping influence on Stroop test have been indirect and inconclusive due to variability of multidimensional coping models and application of different Stroop test. The concept of constricted versus flexible or broad cognitive style have linked personality and coping styles to Stroop performance. The objective of this study was to determine the associations of coping styles with Stroop resistance towards interference (Stroop RI) and subsequently determine the predictors of Stroop performance. Methods: This was a cross-sectional community research design study with purposive sampling. In this study, the self-administered Brief COPE inventory questionnaires and Stroop Test were performed among 205 undergraduate medical students. Results: Findings revealed that behavioural disengagement (r=-0.361), dysfunctional coping (r=-0.355), self-blame (r = 0.222), and substance abuse (r = -0.173) showed negative correlation and proven strong association with Stroop RI. Further multiple regression analyses identified behavioural disengagement (R2 = 0.13), and dysfunctional coping (R2 = 0.024) as significant predictors for interference. Conclusion: Coping styles have implication on Stroop test exhibited in varied cognitive styles. Integrating coping styles factor on Stroop test has glimpsed the future direction of other neuropsychological assessment batteries on the importance of profiling individualistic baseline norms. ASEAN Journal of Psychiatry, Vol. 16 (1): January – June 2015: XX XX.

Matched MeSH terms: Research Design
Fulltext Predictors of life satisfaction among family caregivers of hospitalized first-ever stroke patients in Kelantan

Noor Aini Hussain, Mohamed Rusli Abdullah, Abdul Rahman Esa, Muzaimi Mustapha, Nasir Yusoff

ASEAN Journal of Psychiatry, 2014;15(2):164-175.
MyJurnal

Objective: The involvement of families in assisting health professionals in providing care for their family members who suffer a stroke during hospitalization is common in Malaysia. Family caregivers are accountable in providing for the first-ever stroke survivor’s needs, including maintaining functional improvements gained in rehabilitation and the long-term well-being of the stroke survivors. The objective of this study was to determine the predictors of life satisfaction among family caregivers of hospitalized first-ever stroke patients. Methods: This was a cross-sectional community research design study with purposive sampling. It involved 102 family caregivers of hospitalized first-ever stroke patients of two tertiary hospitals in Kelantan. The Bakas Caregiving Outcomes Score (BCOS) was used to measure life satisfaction. Multiple linear regression was used to determine the predictors of life satisfaction. Results: Out of 102 respondents, 21 were males and 81 were females with age range of 16 to 76 years. Significant predictors of life satisfaction of caregivers while caring for their hospitalized first-ever stroke family members were caregivers’ health (β: -2.875, 95%CI: -5.725, -0.025, p = 0.048), patients’ age (β: - 4.251, 95% CI: - 6.379, -2.123, p

Matched MeSH terms: Research Design
Fulltext Linking psychological traits with criminal behaviour: a review

Mohammad Rahim Kamaluddin, Nadiah Syariani Md Sharif, Azizah Othman, Khaidzir Hj Ismail, Geshina Ayu Mat Saat

ASEAN Journal of Psychiatry, 2015;16(2):135-147.
MyJurnal

Apart from environmental and social factors, psychological traits is largely linked with criminal and delinquent behaviour. The purpose of this article is to review four critical psychological traits of individuals that may lead to criminal behaviour in a nutshell. Methods: An archival research methodology was employed in this study where relevant search for literatures on these four psychological traits was made across search engines such as Google Scholar with relevant articles selected for this review. The literatures were microscopically reviewed in order to demonstrate the linkage between psychological traits and criminal behaviour. Results: Four psychological traits: personality trait, low selfcontrol, aggression behaviour, and cognitive distortion were chosen to address such linkages. All these four traits were discussed thoroughly in relation to crime and criminality contexts. Conclusion: It is crucial to understand the role of these traits and in-depth understanding of each psychological trait with relation of criminal behaviour offers an opportunity to the public at large to expand their knowledge on the importance of practicing and equipping oneself with healthy psychological traits to hinder from criminal and delinquent acts. ASEAN Journal of Psychiatry, Vol. 16 (2): July – December 2015: XX XX.

Matched MeSH terms: Research Design
Fulltext Application of statistical experimental designs for optimization of medium composition in biodegradation of procion red MX-8B

Khadijah, O., Lee, K.K., Abdullah, M.F.F.

ASM Science Journal, 2010;4(2):103-112.
MyJurnal

Two sequential statistical experimental designs were used to screen and investigate the dependence of the amount of biodegradation of Procion Red MX-8B (PR-MX8B) on the fermentation variables. Fourteen factors were screened using the Plackett-Burman design. Among these factors, the most significant variables which included yeast extract, corn steep solids and starch influencing PR-MX8B decolourisation were statistically elucidated for optimization. The optimum concentrations of 5.00 g/l yeast extract, 2.99 g/l starch and 1.89 g/l corn steep solids were predicted by applying the Box-Behnken design to the second order polynomial model fitted to the results obtained. The best predicted optimal conditions verified experimentally yielded 72.11% while the predicted value from the polynomial model was 79.17%. The experimental values were in good agreement with the predicted values with a 90.81% degree of accuracy.

Matched MeSH terms: Research Design
Fulltext Manufacturing process variability:a review

Djauhari, M.A.

ASM Science Journal, 2011;5(2):123-137.
MyJurnal

Almost a half century after it was introduced, Wilks’ statistic has come into application in industrial manufacturing process variability monitoring. This is an important breakthrough in the way experts monitor the variability of manufacturing processes which is vital in modern industry. It leaves behind the traditional practice characterized by the use of sample size n which equals 1, if the process variability monitoring is based on individual observations and is greater than the number of variables p if one works with subgroup observations. The use of Wilks’ statistic allows us to work with n < p. This paper contains a review on process variability monitoring based on individual observations. First, some historical backgrounds of process variability monitoring in the general scheme was reviewed before it was revealed where the philosophy of Wilks’ statistic could be further interpreted. Subsequently it was indicated that the way to monitor the process variability depended on how the variability itself was measured. Finally, a new statistic for detecting the shift in variability based on individual observations was introduced and then a new control chart was proposed. The performance of the proposed chart as compared with Wilks chart, was quite promising. Therefore, some recommendations were given to better understand the history of manufacturing process variability.

Matched MeSH terms: Research Design
Fulltext Consequences of local culinary memorable experience: Evidence from TikTok influencers

Shoukat MH, Selem KM, Elgammal I, Ramkissoon H, Amponsah M

Acta Psychol (Amst), 2023 Aug;238:103962.
PMID: 37356362 DOI: 10.1016/j.actpsy.2023.103962

Underpinned by integrating self-determination and source credibility theories (SCT), this paper investigates the focal roles of memorable local food experiences (MLX) and travel influencer endorsement (TIE) on revisit intention. A questionnaire was used to collect data from 513 TikTok influencers (individuals who frequently post videos on TikTok and have a large number of followers). A purposive sampling technique is used to collect data from TikTok influencers who create videos about food tourism in Pakistan. SmartPLS 4.4 was used with PLS-SEM. The empirical results suggest a positive and significant linkage of culinary memorable experience factors with MLX. The focal effects of MLX and TIE on revisit intention are significantly positive. Our findings further revealed that MLX partially mediated the linkage of culinary memorable experience factors with revisit intention, while TIE strengthened the positive relationship between MLX and revisit intention. The study's findings influence travel agents, local food providers, and marketing specialists who develop marketing strategies for local food tourism and online trip purchasing.

Matched MeSH terms: Research Design
Fulltext Hepatocellular carcinoma with disseminated skeletal muscle metastasis

Rahim EA, Noh MS, Ngah NA, Suraini MS, Yusof MM

Acta Radiol Open, 2017 Jul;6(7):2058460117716705.
PMID: 28811928 DOI: 10.1177/2058460117716705

Hepatocellular carcinoma (HCC) is the commonest primary tumor of the liver and carries a poor prognosis when diagnosed late or left untreated. Treatment relies heavily on the stage of the tumor when diagnosed. Extrahepatic metastasis is known to occur; these are mainly reported via autopsy studies or isolated case reports. Knowledge of extrahepatic metastasis is crucial in order to avoid unnecessary surgery. We report a rare case of a patient at our center, diagnosed to have HCC, who underwent treatment successfully, only to come back with extrahepatic metastasis to the skeletal muscles.

Matched MeSH terms: Research Design
Restocking and stock enhancement of marine invertebrate fisheries

Bell JD, Munro JL, Nash WJ, Rothlisberg PC, Loneragan NR, Ward RD, et al.

Adv. Mar. Biol., 2005;49:xi-374.
PMID: 16503428
Matched MeSH terms: Research Design
Fulltext Perspective: Peer Evaluation of Recommendations for CONSORT Guidelines for Randomized Controlled Trials in Nutrition

Weaver C, Ahles S, Murphy KJ, Shyam S, Cade J, Plat J, et al.

Adv Nutr, 2023 Nov 21.
PMID: 37996044 DOI: 10.1016/j.advnut.2023.100154

Creating effective dietary guidance requires a rigorous evidence base that is predominantly developed from robust clinical trials or large-scale cohort studies, with the quality of the data available depending on the completeness and accuracy of their reporting. An international group of academics from 14 institutions in 12 different countries and on 5 continents, working on behalf of the Federation of European Nutrition Societies within its "Improving Standards in the Science of Nutrition" initiative, reviewed the Consolidated Standards of Reporting Trials (CONSORT) statement checklist as it pertains to nutrition trials. This perspective piece documents the procedure followed to gain input and consensus on the checklist previously published by this group, including its presentation and interrogation at the International Union of Nutritional Sciences International Congress of Nutrition 2022 (IUNS-ICN 22), inputs from a survey of journal editors, and its piloting on 8 nutrition trials of diverse designs. Overall, the initiative has been met with considerable enthusiasm. At IUNS-ICN 22, refinements to our proposal were elicited through a World Café method discussion with participating nutrition scientists. The contributing journal editors provided valuable insights, and the discussion led to the development of a potential tool specific to assess adherence to the proposed nutrition extension checklist. The piloting of the proposed checklist provided evidence from real-life studies that reporting of nutrition trials can be improved. This initiative aims to stimulate further discussion and development of a CONSORT-nutrition-specific extension.

Matched MeSH terms: Research Design*
Semai Senoi mortality: Two-census method

Fix AG

Am J Hum Biol, 1989;1(4):471-477.
PMID: 28514106 DOI: 10.1002/ajhb.1310010410

The mortality pattern of a subpopulation of Semai Senoi of Malaysia is studied by using a two-census method. The method yields abridged life tables for both sexes as well as an estimate of the birth rate. The life tables show that Semai mortality is reduced compared to estimates based on stable population methods for the population prior to 1969. Increased health care availability seems to account for this lower mortality.

Matched MeSH terms: Research Design
Increased Beat-to-Beat Blood Pressure Variability Is Associated With Impaired Cognitive Function

Asmuje NF, Mat S, Goh CH, Myint PK, Tan MP

Am J Hypertens, 2022 Dec 08;35(12):998-1005.
PMID: 36153737 DOI: 10.1093/ajh/hpac107

BACKGROUND: Emerging evidence has linked visit-to-visit, day-to-day and 24-h ABPM blood pressure variability (BPV) with cognitive impairment. Few studies have, however, considered beat-to-beat BPV. This study, therefore, evaluated the relationship between beat-to-beat BPV and cognitive function among community-dwellers aged 55 years and over.
METHODS: Data was obtained from the Malaysian Elders Longitudinal Research (MELoR) study, which employed random stratified sampling from three parliamentary constituencies within the Klang Valley. Beat-to-beat blood pressure (BP) was recorded using non-invasive BP monitoring (TaskforceTM, CNSystems). Low frequency (LF), high frequency (HF) and low-to-high frequency (LF:HF) ratio for BPV were derived using fast Fourier transformation. Cognition was evaluated using the Montreal Cognitive Assessment (MoCA) test, and categorized into normal aging, mild impairment and moderate-to-severe impairment.
RESULTS: Data from 1,140 individuals, mean age (SD) 68.48 (7.23) years, were included. Individuals with moderate-to-severe impairment had higher HF-BPV for systolic (SBP) and diastolic (DBP) blood pressure compared to individuals within the normal aging group [OR (95% CI) = 2.29 (1.62-3.24)] and [OR (95% CI) = 1.80 (1.32-2.45)], while HF-SBPV [OR (95% CI) = 1.41 (1.03-1.93)] but not HF-DBPV was significantly higher with mild impairment compared to normal aging after adjustments for potential confounders. Moderate-to-severe impairment was associated with significantly lower LF:HF-SBPV [OR (95% CI) = 0.29 (0.18-0.47)] and LF:HF-DBPV [OR (95% CI) = 0.49 (0.34-0.72)], while mild impairment was associated with significantly lower LF:HF-SBPV [OR (95% CI) = 0.52 (0.34-0.80)] but not LF:HF-DBPV [OR (95% CI) = 0.81 (0.57-1.17)], compared to normal aging with similar adjustments.
CONCLUSION: Higher HF-BPV, which indicates parasympathetic activation, and lower LF:HF-BPV, which addresses sympathovagal balance, were observed among individuals with moderate-to-severe cognitive impairment. Future studies should determine whether BPV could be a physiological marker or modifiable risk factor for cognitive decline.

Matched MeSH terms: Research Design*
Knowledge, attitude, and practice of white coat use among medical students during clinical practice (LAUNDERKAP): A cross-sectional study

Chan CK, Lam TY, Mohanavel L, Ghani JA, Anuar ASK, Lee CJ, et al.

Am J Infect Control, 2024 Jan;52(1):35-40.
PMID: 37423404 DOI: 10.1016/j.ajic.2023.06.022

BACKGROUND: Recent studies found white coats to be reservoirs for bacteria and medical students did not conform to proper hygiene measures when using these white coats. We investigated the knowledge, attitude, and practice (KAP) of medical students toward white coat use in clinical settings (LAUNDERKAP).
METHODS: A validated, online-based survey was disseminated to 670 students from four Malaysian medical schools via random sampling. Scores were classified into good, moderate, or poor knowledge and practice, and positive, neutral, or negative attitude. Mann-Whitney U and Kruskal-Wallis tests were used to analyze the relationship between demographic variables and knowledge, attitude, and practice scores.
RESULTS: A total of 492/670 students responded (response rate: 73.4%). A majority showed negative attitudes (n = 246, 50%), poor knowledge (n = 294, 59.8%), and moderate practice (n = 239, 48.6%). Senior and clinical year students had more negative attitudes. Male students had higher knowledge, while students from private medical schools and preclinical years had better practice. There was a significant relationship between attitude and practice (r = 0.224, P

Matched MeSH terms: Research Design
The split-mouth investigation and statistical computation

Gadde P, Arunachalam S, Sharan J

Am J Orthod Dentofacial Orthop, 2022 Nov;162(5):591-592.
PMID: 37830531 DOI: 10.1016/j.ajodo.2022.07.017
Matched MeSH terms: Research Design*

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