Fluid intake, hydration status and its association with cognitive function among adolescents in Petaling Perdana, Selangor, Malaysia

Serene En Hui Tung,Yi Zhang Ch’ng,Thaneswary V Karnan,Pei Nee Chong,Jamil Osman Zubaidah,Yit Siew Chin 한국영양학회 2020 Nutrition Research and Practice Vol.14 No.5

BACKGROUND/OBJECTIVES: A cross-sectional study was undertaken to evaluate fluid intake and hydration status in association with cognitive function among 230 adolescents (10–14 years of age) in Petaling Perdana, Selangor, Malaysia. SUBJECTS/METHODS: Urine color was used to measure hydration status, while fluid intake was assessed using the 15-item beverage intake questionnaire. Cognitive function was assessed using the Wechsler Intelligence Scale for Children, Fourth Edition. RESULTS: More than half of the adolescents were mildly or moderately dehydrated (59.6%) and only one-third (33.0%) were well hydrated. Among the daily fluid types, intakes of soft drinks (r = −0.180; P = 0.006), sweetened tea (r = −0.184; P = 0.005) and total sugar-sweetened beverages (SSBs) (r = −0.199; P = 0.002) were negatively correlated with cognitive function. In terms of hydration status, cognitive function score was significantly higher (F-ratio = 4.102; P = 0.018) among hydrated adolescents (100.38 ± 12.01) than in dehydrated (92.00 ± 13.63) counterparts. Hierarchical multiple linear regression analysis, after adjusting for socio-demographic factors, showed that soft drinks (β = −0.009; P < 0.05) and sweetened tea (β = −0.019; P < 0.05) negatively predicted cognitive function (ΔR2 = 0.044). When further control for sources of fluid, hydration status (β = −2.839; P < 0.05) was shown to negatively predict cognitive function (ΔR2 = 0.021). The above variables contributed 20.1% of the variance in cognitive function. CONCLUSIONS: The results highlight the links between fluid intake (soft drinks, sweetened tea, total SSBs) and hydration status with cognitive function in adolescents. Interventions aimed at decreasing the consumption of SSBs and increasing hydration status through healthy fluid choices, such as water, could improve cognitive performance in adolescents.

Predictive value of post-operative drain amylase levels for post-operative pancreatic fistula

Tang Ee Ling Serene,Shelat Vishalkumar G,Junnarkar Sameer Padmakumar,Huey Cheong Wei Terence,Low Jee Keem,Wang Bei,Woon Wei Liang Winston 한국간담췌외과학회 2018 Annals of hepato-biliary-pancreatic surgery Vol.22 No.4

Backgrounds/Aims: Traditionally, surgically placed pancreatic drains are removed, at the discretion of the operating surgeon. Moving towards enhanced recovery after surgery (ERAS), we looked for predictors for early drain removal. The purpose of this paper was to establish which postoperative days’ (POD) drain amylase is most predictive against post-operative pancreatic fistula (POPF). Methods: We conducted a retrospective study of 196 patients who underwent pancreatic resection at our institute from January 2006 to October 2013. Drain amylase levels were routinely measured. The International Study Group of Pancreatic Fistula (ISGPF) definition of POPF, and clinical severity grading were used. Results: 5.1% (10 of 196) patients developed ISGPF Grades B and C POPF. Negative predictive value of developing significant POPF, if drain amylase values were low on PODs 1 and 3 was 98.7% (95% CI: 0.93-1.00). This translated to confidence in removing surgically placed pancreatic drains, at POD 1 and 3 when drain amylase values are low. Conclusions: Patients with low drain amylase values on POD 1 and 3, are unlikely to develop POPF and may have pancreatic drains removed earlier.

The Effects of Wire Geometry and Wire Layout on Wire Sweep Performance using LQFP Packages in Transfer Mold

Siti Sofiyah Skh Ali,Bee Chin Ang,Serene Teh Seoh Hian 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.

Transfer molding is the most effective method for molding encapsulation for semiconductor packaging due to low maintenance costand high production yield. Wire sweep is a critical moldability issue as excessive wire sweep will contact neighbouring wires, causingelectrical short that consequently leads to electrical failure of the package. Wire sweep characterization was carried out with variouswire locations, mold flow directions, wire lengths, wire pitches and wire angles on Low Quad Flat Packages (LQFP). JMP statisticalanalysis was performed to determine the significant factors and correlations of wire sweep performance. It was found that wire lengthhas the most significant correlation with wire sweep percentage. The four wires, two at the bottom-left and top-right (and hencedesignated as corner 2 and 4, respectively) exhibited the worst wire sweep when the mold gate was located at the top-left corner ofthe package. The wire sweep performance of seven wire layouts with varying wire lengths were also investigated. The results haverevealed and proven that the two wires (corner 2 and 4, respectively) exhibited a higher wire sweep percentage. Overall, it was foundthat wire X4 has the highest wire sweep deflection.

Problematic Use of Internet Among Indonesia University Students: Psychometric Evaluation of Bergen Social Media Addiction Scale and Internet Gaming Disorder Scale-Short Form

Iqbal Pramukti,Ira Nurmala,Siti R. Nadhiroh,Serene En Hui Tung,Wan Ying Gan,Yan-Li Siaw,Yung-Ning Yang,Mark D. Griffiths,Chung-Ying Lin,Amir H. Pakpour 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.12

Objective Social media addiction and internet gaming disorder may cause mental health problems among a minority of university students. The Bergen Social Media Addiction Scale (BSMAS) and the 9-item Internet Gaming Disorder Scale-Short Form (IGDS9-SF) are commonly used worldwide. However, they have not been translated or validated into Indonesian. The present study aimed to translate and validate the BSMAS and IGDS9-SF in an Indonesian context among young adults.Methods A multi-center, web-based cross-sectional study was conducted among 458 university students (74% female; mean age 22.5 years) in Indonesia from June to December 2021. The BSMAS and IGDS9-SF were translated into Indonesian. Internal consistency (using Cronbach’s α and McDonald’s ω) and factor structure (using confirmatory factor analysis) of the two instruments were examined. Concurrent validity of BSMAS and IGDS9-SF was examined using their correlations with two external concepts: nomophobia and psychological distress.Results Internal consistency of the Indonesian BSMAS and IGDS9-SF were both acceptable (Cronbach’s α=0.80 and 0.90; McDonald’s ω=0.86 and 0.92). Both instruments were unidimensional with good factor loadings (0.54–0.78 for BSMAS; 0.63–0.79 for IGDS9-SF). Moreover, BSMAS and IGDS9-SF had stronger associations with nomophobia (r=0.58 and 0.12; p<0.001) than with psychological distress (r=0.43 and 0.15; p<0.001).Conclusion The Indonesian versions of the BSMAS and IGDS9-SF had good psychometric properties in terms of linguistic validity, unidimensionality, and reliability. The findings indicate the tools are appropriate for assessing the risk of social media addiction and internet gaming disorder among university students in Indonesia.

Novel continuous ultrasonic contactor system for CO2 absorption: Parametric and optimization study

Siti Munirah Mhd Yusof,Kok Keong Lau,Azmi Mohd Shariff,Wee Horng Tay,Nur Farhana Ajua Mustafa,Serene Sow Mun Lock 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-

High frequency ultrasonic-assisted absorption in a batch system has shown significant enhancement forCO2 removal. Nevertheless, its performance in continuous mode has yet to be studied. A novel continuoushigh frequency ultrasonic contactor system for CO2 capture has been developed to study the effect of gasflow rate (15–25 SLPM), liquidflow rate (0.1–0.5 SLPM), pressure (10–50 bar) and voltage (0–30 V) on theabsorption performance. A validated quadratic model was developed, and the optimum condition wasidentified using central composite design coupled with response surface methodology. Based on theresults, current system demonstrated better absorption performance as compared to other contactors.

Food security and diet quality among urban poor adolescents in Kuala Lumpur, Malaysia

Janice Ee Fang Tay,Satvinder Kaur,Wui Wui Tham,Wan Ying Gan,Nik Norasma Che Ya,Choon Hui Tan,Serene En Hui Tung 한국영양학회 2023 Nutrition Research and Practice Vol.17 No.2

BACKGROUND/OBJECTIVES: This study aimed to examine the food security status of urban poor adolescents and its association with diet quality. SUBJECTS/METHODS: A cross-sectional survey was conducted among 188 adolescents aged 13–18 yrs living in Kuala Lumpur, Malaysia. Household food insecurity and dietary intake data were collected using the Radimer/Cornell hunger and food insecurity instrument and 2-day 24-h dietary recalls, respectively. Diet quality was determined using the Malaysian Healthy Eating Index (HEI). Weight and height were measured and body mass index-for-age, as well as height-for-age z scores were calculated. RESULTS: The present study revealed that 47.9% of the adolescents experienced household food insecurity, 24.5% experienced individual food insecurity, 18.6% household food security, and 9.0% child hunger. The mean score of diet quality was 56.83 ± 10.09, with a significantly lower HEI score among food insecure adolescents (household food insecure, individual food insecure, and child hunger) than household food secure adolescents (P = 0.001). The differences between food secure and food insecure households were found to be significant for energy (P = 0.001) and nutrients including proteins (P = 0.006), carbohydrates (P = 0.005), dietary fiber (P = 0.001), folate (P < 0.001), and vitamin C (P = 0.006). The multiple linear regression showed that adolescents who experienced food insecurity (β = −0.328; P = 0.003) were found to be significantly associated with poor diet quality (F = 2.726; P < 0.01), wherein 13.3% of the variation in the diet quality was explained by the food security status. CONCLUSIONS: Experiencing food insecurity contributed to poor diet quality among urban poor adolescents. Further longitudinal studies are needed to comprehensively understand this association to improve food insecurity and diet quality among urban poor communities.

SOLVING RESOURCE CONSTRAINED MULTIPLE ALTERNATIVE PROJECT SCHEDULING PROBLEMS WITH TIME AND RESOURCE BASED OBJECTIVES

Seren Ozmehmet Tasan,Mitsuo Gen 한국경영과학회 2008 한국경영과학회 학술대회논문집 Vol.2008 No.5

In a multiple project environment, where there also exists alternative ways for performing each project, a new type of problem called resource constrained multiple project scheduling problem with alternative projects (rcmPSP/aP) forms. The rc-mPSP/aP may be viewed as a network of projects which also involves project alternatives. When dealing with alternative projects, there are two approaches, i.e., hierarchic and the monolithic approach. Traditionally, almost all of the researchers are using hierarchic approach. The hierarchical approach partitions the problem into a hierarchy of two subproblems, i.e. alternative project selection and scheduling, where the first one tries to identify the best alternative among projects (simplifies the problem into a rc-mPSP) and then the second one tries to solve the rc-mPSP using only these alternative projects. Therefore, in this approach, since the researchers are eliminating some features of the whole problem before scheduling procedure, the problem in these academic researches is losing its integrity. In this research, we are planning to apply a monolithic approach which considers these two sub-problems together. The monolithic approach formulates the problem as an exclusive scheduling problem and tries to solve the rcmPSP/ aP. Particularly, a genetic algorithm (GA) approach will be constructed in order to solving rcmPSP/ aP efficiently. Since there exist two sub-problems in rc-mPSP/aP, a multistage GA is going to be constructed to reflect the sub-problems together in the exclusive problem. Finally, time and resource based objective functions are going to be used together to evaluate the performance of the proposed monolithic multistage GA approach.

SOLVING RESOURCE CONSTRAINED MULTIPLE ALTERNATIVE PROJECT SCHEDULING PROBLEMS WITH TIME AND RESOURCE BASED OBJECTIVES

Seren Ozmehmet Tasan,Mitsuo Gen 대한산업공학회 2008 대한산업공학회 춘계학술대회논문집 Vol.2008 No.5

In a multiple project environment, where there also exists alternative ways for performing each project, a new type of problem called resource constrained multiple project scheduling problem with alternative projects (rcmPSP/aP) forms. The rc-mPSP/aP may be viewed as a network of projects which also involves project alternatives. When dealing with alternative projects, there are two approaches, i.e., hierarchic and the monolithic approach. Traditionally, almost all of the researchers are using hierarchic approach. The hierarchical approach partitions the problem into a hierarchy of two subproblems, i.e. alternative project selection and scheduling, where the first one tries to identify the best alternative among projects (simplifies the problem into a rc-mPSP) and then the second one tries to solve the rc-mPSP using only these alternative projects. Therefore, in this approach, since the researchers are eliminating some features of the whole problem before scheduling procedure, the problem in these academic researches is losing its integrity. In this research, we are planning to apply a monolithic approach which considers these two sub-problems together. The monolithic approach formulates the problem as an exclusive scheduling problem and tries to solve the rcmPSP/ aP. Particularly, a genetic algorithm (GA) approach will be constructed in order to solving rcmPSP/ aP efficiently. Since there exist two sub-problems in rc-mPSP/aP, a multistage GA is going to be constructed to reflect the sub-problems together in the exclusive problem. Finally, time and resource based objective functions are going to be used together to evaluate the performance of the proposed monolithic multistage GA approach.

Effect of sintering programs and surface treatments on monolithic zirconia

Seren Nur Dokuzlu,Meryem Gülce Subaşı 대한치과보철학회 2024 The Journal of Advanced Prosthodontics Vol.16 No.1

Purpose. To investigate the effect of sintering programs and surface treatments on surface properties, phase transformation and flexural strength of monolithic zirconia. Materials and Methods. Zirconia specimens were sintered using three distinct sintering programs [classic (C), speed (S), and superspeed (SS)] (n = 56, each). One sample from each group underwent scanning electron microscopy (SEM) and grain size analysis following sintering. Remaining samples were divided into five subgroups (n = 11) based on the surface treatments: control (CL), polish (P), glaze (G), grind + polish (GP), and grind + glaze (GG). One sample from each subgroup underwent SEM analysis. Remaining samples were thermally aged. Monoclinic phase volume, surface roughness, and three-point flexural strength were measured. Monoclinic phase volume and surface roughness were analyzed by Kruskal-Wallis and Dunn tests. Flexural strength was analyzed by two-way ANOVA and Weibull analysis. The relationships among the groups were analyzed using Spearman’s correlation analysis. Results. Sintering program, surface treatment, and sintering × surface treatment (P ≤ .010) affected the monoclinic phase volume, whereas the type of surface treatment and sintering × surface treatment affected the surface roughness (P < .001). Type of sintering program or surface treatment did not affect the flexural strength. Weibull analysis revealed no significant differences between the m and σo values. Monoclinic phase volume was positively correlated with surface roughness in the SGG and SSP groups. Conclusion. After sintering monolithic zirconia in each of the three sintering programs, each of the surface treatments can be used. However, for surface quality and aging resistance, G or GG can be recommended as a surface finishing method.

Chronobiology Revisited in Psychiatric Disorders: From a Translational Perspective

Simge Seren Kirlioglu,Yasin Hasan Balcioglu 대한신경정신의학회 2020 PSYCHIATRY INVESTIGATION Vol.17 No.8

Objective Several lines of evidence support a relationship between circadian rhythms disruption in the onset, course, and maintenance of mental disorders. Despite the study of circadian phenotypes promising a decent understanding of the pathophysiologic or etiologic mechanisms of psychiatric entities, several questions still need to be addressed. In this review, we aimed to synthesize the literature investigating chronobiologic theories and their associations with psychiatric entities. Methods The Medline, Embase, PsycInfo, and Scopus databases were comprehensively and systematically searched and articles published between January 1990 and October 2019 were reviewed. Different combinations of the relevant keywords were polled. We first introduced molecular elements and mechanisms of the circadian system to promote a better understanding of the chronobiologic implications of mental disorders. Then, we comprehensively and systematically reviewed circadian system studies in mood disorders, schizophrenia, and anxiety disorders. Results Although subject characteristics and study designs vary across studies, current research has demonstrated that circadian pathologies, including genetic and neurohumoral alterations, represent the neural substrates of the pathophysiology of many psychiatric disorders. Impaired HPA-axis function-related glucocorticoid rhythm and disrupted melatonin homeostasis have been prominently demonstrated in schizophrenia and other psychotic disorders, while alterations of molecular expressions of circadian rhythm genes including CLOCK, PER, and CRY have been reported to be involved in the pathogenesis of mood disorders. Conclusion Further translational work is needed to identify the causal relationship between circadian physiology abnormalities and mental disorders and related psychopathology, and to develop sound pharmacologic interventions.