Scopus 2020
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Publication Metadata only Sphere-like and flake-like ZnO immobilized on pineapple leaf fibers as easy-to-recover photocatalyst for the degradation of congo red(2020-01-01) Siraprapha Deebansok; Taweechai Amornsakchai; Pannagorn Sae-Ear; Punnama Siriphannon; Siwaporn Meejoo Smith; King Mongkut's Institute of Technology Ladkrabang; Mahidol University© 2020 Elsevier Ltd. This work reports immobilization of ZnO photocatalyst on very fine pineapple leaf fiber (PALFs) by a by polyelectrolyte coating method, for the removal of colored pollutants from water stream, allowing for simple recovery after use. It also emphasizes on the effect of defect structure containing in ZnO of hierarchical sphere-like and flake-like morphologies on the color removal performance. The photocatalytic activity of ZnO/PALFs for degradation of congo red (CR) dye was examined under static (dark) and UV/visible irradiation conditions, and effective color removal (>95 %) was achieved, as the results of adsorption and photo-oxidation processes. Results from photoluminescence and X-ray photoelectron spectroscopy suggested that the sphere-like ZnO, bearing zinc vacancies (VZn), zinc interstitials (Zni), singly ionized oxygen vacancies (Vo+), and oxygen vacancies (Vo), has superior photocatalytic activity up to 3.6 times compared to that of flake-like ZnO. With the recyclability up to 3 cycles (>84 % color removal efficiencies), the ZnO immobilized on PALFs have shown a great promise as an easy-to-recover photocatalyst for the removal of colored pollutants in wastewater treatment processes.Publication Metadata only Development of a fluorescent distance-based paper device using loop-mediated isothermal amplification to detect: Escherichia coli in urine(2020-12-21) Natkrittaya Saengsawang; Toon Ruang-Areerate; Piyanate Kesakomol; Thanyapit Thita; Mathirut Mungthin; Wijitar Dungchai; Mahidol University; King Mongkut s University of Technology Thonburi; Phramongkutklao College of Medicine© 2021 The Royal Society of Chemistry. The highly sensitive and selective determination of Escherichia coli (E. coli) in urine was achieved using a SYBR™ safe loop-mediated isothermal amplification (LAMP) method with a distance-based paper device. New primers set specific to multi-copy the 16s rRNA gene of E. coli were designed and used in this study. The detection sensitivity of these primers was higher than in related work and they could be incorporated with a low-cost paper-based device to quantify E. coli in urine at a concentration lower than 101 CFU mL-1. Regarding standard artificial urine, a linear range of a 10-fold dilution of E. coli concentration (105-100 CFU mL-1) with an R-square value (R2) = 0.9823 was observed directly using a fluorescent migratory distance of the 4 μL reaction mixture in the detection zone under blue light without the need for postreaction staining process. Based on the device, E. coli infection could be significantly categorized into 3 groups; none, light, and heavy levels, which is beneficial for UTI diagnosis. Hence, this paper-based device is suitable for use with the SYBR™ Safe-LAMP assay to semi-quantify E. coli, especially in resource-limited settings due to advantages of low cost, simple fabrication and operation, and no requirement for sophisticated instruments, as well as its disposability and portability.Publication Metadata only Chromatographical profiles and microscopical characteristics of four Callicarpa species leaf samples collected in Thailand(2020-12-08) P. Sithisarn; S. Muensaen; S. Jarikasem; Thailand Institute of Scientific and Technological Research (TISTR); Mahidol University© 2020 International Society for Horticultural Science. All rights reserved. The genus Callicarpa is a large and widespread genus in the family Lamiaceae. In Thailand, 12 species of Callicarpa have been identified with the presence of remarkable therapeutic effects, such as the treatment of abdominal troubles, amenorrhea, wounds, and asthma. Phytochemical and microscopical profiles of the leaf samples from four Callicarpa plants in Thailand; C. arborea Roxb., C. candicans (Burm. f.) Hochr., C. longifolia Lam., and C. rubella Lindl. were evaluated by chromatographic and microscopic techniques. Thin layer chromatographic (TLC) and high performance liquid chromatographic (HPLC) analysis suggested that all Callicarpa leaf methanol extracts showed similar chromatographic patterns with the major compounds corresponding to oleanolic acid and β-sitosterol. Only the leaf extract from C. candicans showed the presence of callicarpone, the compound that was previously reported to promote strong piscicidal effect. Microscopic analysis of plant powders showed that all selected Callicarpa leaf samples contained similar preliminary cells including epidermis, trichomes, fragments of lamina, and mesophyll layers. Six types of trichome; uni- and multi-cellular covering, stellate, candelabra, biramous/two-armed, and peltate glandular trichomes were found in these four selected Callicarpa leaves in different sizes and amounts. Therefore, the number, size, and type of the trichome could be used to differentiate Callicarpa species by microscopic technique. The information about the chromatographic fingerprints and microscopic characteristics from this study could be a guidance for quality control and setting up the specification of Callicarpa plant raw materials and extracts in the future.Publication Metadata only Getting to know one's role in team through personality-based clustering(2020-11-04) Jidapa Kraisangka; Wudhichart Sawangphol; Punnawich Rojcharoenpreeda; Chosita Tangchadakorn; Mathas Vechjatuporn; Chanya Limpasitiponm; Panumas Itthisaeng; Sirapat Boonwan; Mahidol University; AIS Academy Assessment CenterCopyright © JCSSE 2020 - 17th International Joint Conf. on Computer Science and Software Engineering. Matching a person to the right job with the right role has been a challenge for any organizations. In addition to the general criteria from the resume, we can use personality data from the personality test to identify the suitable role of an employee in the team. In this paper, we explore the characteristic of roles in the team through the personality-based clustering. Data from the personality assessment of the 573 anonymous employees were used in the analysis. After the series of experiments, we obtained the optimal model with k-mean algorithm (k = 3). We further verified the clusters with the psychologists to identify the role of each employee in the team characterized by each cluster. As a result, together with the psychologist research team, we identified three main roles in a team, including logicians, supporters, and adapters.Publication Metadata only Heuristic algorithms for surveyor standby location planning with multiple plans(2020-01-01) Rawee Suwandechochai; Wasin Padungwech; Mahidol University; Science© 2020, North Atlantic University Union NAUN. All rights reserved. This paper concerns a location problem which arises from an auto insurance company which aims to meet customers’ satisfaction by sending their surveyors to accident locations as promptly as possible. The goal of the problem is to find a suitable set of locations at which the surveyors stand by and to determine coverage area for each standby location by using heuristic algorithms. One challenge of this problem is that the number and locations of accidents can vary from time to time and may not be evenly distributed over a given time horizon. In this paper, a computational study is conducted to make a comparison between standby location planning strategies that involve one and two plans. For the strategies with two plans, several strategies for deciding when to switch between the plans are investigated. Experimental studies suggest that using multiple standby location plan throughout the time horizon can improve the efficiency of surveyors in terms of their total distance. Moreover, compared with usual rules of splitting dates such as weekdays versus weekends, the total distance can be reduced by switching between the location plans according to classification of dates by k-means clustering based on historical data of accident frequencies on each day.Publication Metadata only Individual learning effectiveness based on cognitive taxonomies and constructive Alignment(2020-11-16) Phat Huu Nguyen; Preecha Tangworakitthaworn; Lester Gilbert; University of Southampton; Mahidol University© 2020 IEEE. Online learning is becoming increasingly popular and used in many academic disciplines due to its advantages, where learners can access courses from anywhere and at any time. Besides benefits, online learning may have limitations, such as slow response times when bandwidth is limited, or inflexible one-size-fits-all content without regard for the learner's background or knowledge state. This paper presents an approach to more flexible online learning, where recommended learning paths are derived from the results of learning activities and assessment tasks. The proposed paths comprise multiple intended learning outcome (ILO) nodes based upon and sequenced according to Bloom's taxonomies and Biggs' principles of constructive alignment (PCA).Publication Metadata only The discount factor for expected fundamentals: Evidence from a panel of 25 exchange rates(2020-01-01) Phornchanok Cumperayot; Roy Kouwenberg; Chulalongkorn University; Erasmus School of Economics; Mahidol University© 2020 CEPII (Centre d'Etudes Prospectives et d'Informations Internationales), a center for research and expertise on the world economy In asset pricing models the exchange rate is the discounted present value of expected economic fundamentals. Engel and West (2005) demonstrate that the well-known weak link between exchange rates and fundamentals, such as money supply, output, inflation and interest rates, is an implication of the model if the discount factor is close to one. Empirical evidence so far is limited. In this paper we estimate the discount factor in the money income model and the Taylor rule model for a large cross-section of 25 currencies, in the period 2001–2018. The results confirm that, on average, the discount factor is indeed close to one, while the estimate is lower for currencies of developing economies and at longer forecast horizons.Publication Metadata only AdversarialQR: An adversarial patch in QR code format(2020-08-26) Aran Chindaudom; Prarinya Siritanawan; Karin Sumongkayothin; Kazunori Kotani; Mahidol University; Japan Advanced Institute of Science and Technology© 2020 IEEE. In this paper, we present a method to camouflage an attack on image recognition system by using an adversarial patch embedded on a scan-ready QR code. Adversarial patch refers to a class of a real-world attack on a machine learning system that adds a 'patch' onto the image. However, unlike existing methods, they are highly conspicuous to human perception. As these attacks are performed in the real world, they require users to manipulate the scene. However, not only the patch catches the attention of the classification system but also bystanders' attention as well. We believe that forcing the adversarial patch into the form of a scan-ready QR code can conceal its primary reason to exist in the scene. The main challenge of the research is the process of forcing an adversarial patch into a scan-ready QR code while trying to retain as much information for the patch to work as a real-world adversarial example. The experiments had been done to investigate trade-off compared to training the patch in different shapes.Publication Metadata only Effect of paclobutrazol on growth of young potted flame tree (Delonix regia (Hook.) Raf.)(2020-12-08) P. Srikoat; A. Pichakum; P. Boonkorkaew; N. Pichakum; Kasetsart University; Mahidol University© 2020 International Society for Horticultural Science. All rights reserved. The planting of street trees is a common feature to support a good urban environment. The negative interaction between tree roots and construction results in sidewalk damage often happening especially in cities in tropic regions, due to the long period of seasonal growth. Thus the technique for retarding growth should be investigated. This study aimed to evaluate the effect of paclobutrazol (PBZ) application on growth responses in a young flame tree (Delonix regia (Hook.) Raf.). Uniform five-months-old seedlings were cultured in a plastic pot and once applied as a soil drench at 0 (control), 2, 4, and 8 g active ingredient (a.i.). The study was done at a plant nursery of Kasetsart University, Bangkok, Thailand (N 13.847531; E 100.571396). Six and half months later, shoot and root growths were evaluated. In PBZ treated plants progressively short shoot length was found and vice versa to dose increase. High dose PBZ at 4 and 8 g a.i. reduced total root length; however, low dose; 2 g a.i. enlarged instead. The concentration at 4 g a.i. significantly affected the reduction in root length with acceptable shoot performances. Soil applied with PBZ might be a potential way to retard growth performance for street trees.Publication Metadata only Effects of Concentration and Temperature on Corrosion and Scale Inhibitive Behavior of Uncaria gambir Extract for Low-Carbon Steel in Cooling-Water Solution(2020-11-01) Jiraphan Pleanteangthume; Manthana Jariyaboon; Mahidol University© 2020, Allerton Press, Inc. Abstract: The corrosion inhibition property of the Uncaria gambir extract (UGE) for the low-carbon steel was investigated in a prepared cooling-water solution using gravimetric analysis and potentiodynamic polarization measurements. Anticorrosive effectiveness was tested at the UGE concentrations of 0–1500 ppm and temperatures of 40–60°C. The CaCO3 scale inhibition performance was evaluated following NACE standard TM 0374-2007 and ASTM D511-03. The surface morphology was analyzed by scanning electron microscopy. It was found that increasing the UGE concentration increased its anticorrosive effectiveness. A 70% corrosion inhibition efficiency and a 31% CaCO3 scale inhibition efficiency were observed during the use of 1500 ppm UGE. A change in the morphology of CaCO3 precipitate was observed due to the adsorption of the UGE, which suppressed the regular growth process. Increasing temperature decreased the effectiveness of the UGE. A higher corrosion potential and a reduction of anodic reactivity were also observed. The UGE acted as anodic inhibitor and conformed the Langmuir adsorption isotherm.Publication Metadata only Botanical garden and plant diversity conservation in China(2020-12-08) S. J. Pei; K. Thammasiri; Z. W. Yang; Kunming Institute of Botany Chinese Academy of Sciences; Mahidol University© 2020 International Society for Horticultural Science. All rights reserved. The worldwide contribution of Chinese plants can be simply explained by its rich plant diversity and domestication of cultivated plants in global agriculture development and botanical garden plants. China has recorded 32,096 native species of higher plants belonging to 3,156 genera and 323 families, of which 50% are endemic to China. China with its ancient civilization has developed a wide variety of cultivated plants in agriculture, horticulture, and forestry, at least 136 cultivated plants originated from China, making up 20% of the world total cultivated plants (666 species) around the world for their economic importance. The history of botanical gardens in China can be traced back to 2,000 years ago during the Han Dynasty. Modern botanical gardens in China have been developed over 138 years, up to 2015, there are 191 botanical gardens established all over China. So far 197,517 plant taxa maintained in 142 botanical gardens' 99,771 ha for ex situ conservation. Botanical gardens play an important role of botanical research in introduction and acclimatization of plants, development of new crops and domestication of plants for landscape construction in supporting for sustainable development of China. The third important function of botanical gardens is to serve as a popular public education institutions for plant conservation and botanical knowledge dissemination through garden plants in different living plant collections and training programs, so as to contribute to a national strategy of eco-civilization construction in China.Publication Metadata only An Investigation of the Relationship Among Medical Center’s Image, Service Quality, and Patient Loyalty(2020-01-01) Chanchai Phonthanukitithaworn; Phaninee Naruetharadhol; Nathatenee Gebsombut; Raoyrin Chanavirut; Wanwipada Onsa-ard; Pawanrut Joomwanta; Zou Chanyuan; Chavis Ketkaew; Khon Kaen University; Mahidol University© The Author(s) 2020. This research aimed to study significant relationships among factors influencing customer satisfaction and loyalty in the health care service industry. In order to test the conceptual framework, structural equation modeling (SEM) was used to analyze the data from 252 respondents (outpatients) at four public and private hospitals in Khon Kaen City, Thailand. This empirical research determined how the health care service image, service quality, and behavioral intentions were interrelated using a scale adapted from Taiwan Customer Satisfaction and American Customer Satisfaction Indices, as the perceived quality variable was designated as a second-order construct. The findings showed that the significant factor impacting customer loyalty is customer satisfaction. Corporate image significantly enhanced both customer expectations (CEs) and perceived service quality. The researchers also observed that perceived service quality was positively related to tangibility, instrumental, and emotional supports in addition to customer satisfaction. In conclusion, this article proposed a thoughtful research scenario for management and corporate/public policymakers at the national level in Thailand. It was observed that a good image could directly enhance perceived service quality for businesses in the health service sector. Short Abstract: We aimed to explore the relationship between image, service quality, and patient loyalty in the health service sector. A multivariate analysis (structural equation modeling) was employed to analyze the data from 252 outpatients in Khon Kaen City, Thailand. The conventional service quality model suggests that corporate image influences customer expectation, and then affects perceived service quality, then customer satisfaction, and finally, loyalty. However, this article found that, in the health service sector, a corporate image may directly influence perceived service quality without the customer expectation variable as a mediator.Publication Metadata only Longitudinal Screening for Diabetic Retinopathy in a Nationwide Screening Program: Comparing Deep Learning and Human Graders(2020-01-01) Jirawut Limwattanayingyong; Variya Nganthavee; Kasem Seresirikachorn; Tassapol Singalavanija; Ngamphol Soonthornworasiri; Varis Ruamviboonsuk; Chetan Rao; Rajiv Raman; Andrzej Grzybowski; Mike Schaekermann; Lily H. Peng; Dale R. Webster; Christopher Semturs; Jonathan Krause; Rory Sayres; Fred Hersch; Richa Tiwari; Yun Liu; Paisan Ruamviboonsuk; Google LLC, Asia Pacific; Chulalongkorn University; Sankara Nethralaya; Uniwersytet Warminsko-Mazurski w Olsztynie; Rangsit University; Mahidol University; Google LLC; Foundation for Ophthalmology Development; Chulabhorn Hospital© 2020 Jirawut Limwattanayingyong et al. Objective. To evaluate diabetic retinopathy (DR) screening via deep learning (DL) and trained human graders (HG) in a longitudinal cohort, as case spectrum shifts based on treatment referral and new-onset DR. Methods. We randomly selected patients with diabetes screened twice, two years apart within a nationwide screening program. The reference standard was established via adjudication by retina specialists. Each patient's color fundus photographs were graded, and a patient was considered as having sight-threatening DR (STDR) if the worse eye had severe nonproliferative DR, proliferative DR, or diabetic macular edema. We compared DR screening via two modalities: DL and HG. For each modality, we simulated treatment referral by excluding patients with detected STDR from the second screening using that modality. Results. There were 5,738 patients (12.3% STDR) in the first screening. DL and HG captured different numbers of STDR cases, and after simulated referral and excluding ungradable cases, 4,148 and 4,263 patients remained in the second screening, respectively. The STDR prevalence at the second screening was 5.1% and 6.8% for DL- and HG-based screening, respectively. Along with the prevalence decrease, the sensitivity for both modalities decreased from the first to the second screening (DL: from 95% to 90%, p=0.008; HG: from 74% to 57%, p<0.001). At both the first and second screenings, the rate of false negatives for the DL was a fifth that of HG (0.5-0.6% vs. 2.9-3.2%). Conclusion. On 2-year longitudinal follow-up of a DR screening cohort, STDR prevalence decreased for both DL- and HG-based screening. Follow-up screenings in longitudinal DR screening can be more difficult and induce lower sensitivity for both DL and HG, though the false negative rate was substantially lower for DL. Our data may be useful for health-economics analyses of longitudinal screening settings.Publication Metadata only Granule morphological and structural variability of Thai certified glutinous rice starches in relation to thermal, pasting, and digestible properties(2020-01-01) Maysaya Thitisaksakul; Wichian Sangwongchai; Urairat Mungmonsin; Pennapa Promrit; Kuakarun Krusong; Kwanjeera Wanichthanarak; Kanitha Tananuwong; Chulalongkorn University; Khon Kaen University; Faculty of Medicine, Siriraj Hospital, Mahidol University© 2020 Cereals & Grains Association Background and objectives: Variation in composition and functionality of glutinous rice starch greatly affects their industrial application. This study examined the starch compositional, structural, and functional variability among five Thai glutinous rice cultivars, and the effect of molecular structure and composition on starch functionality was pinpointed. Findings: Amylose content, amylopectin chain-length distribution (CLD), and relative crystallinity were not different among the cultivars (p ≤.05), whereas RD14 possessed largest mean granule diameter. Conclusion temperature of gelatinization and peak viscosity (PV) were lowest in RD6 and RD10, respectively, while RD6, RD10, and RD14 had lower breakdown (BD) compared to others. Despite small variation within each parameter, multivariate analysis revealed the distinct characteristic of waxy donor, RD6, and RD10 compared to others. Proportion of amylopectin B1 chains and granule size showed negative correlation (r > 0.5) with PV and BD, respectively, whereas proportion of amylopectin B2 chains positively correlated (r > 0.5) with PV and final viscosity (FV). Conclusion: Amylopectin CLD and starch granule size were the key factors determining starch pasting properties among these waxy rice genotypes. Significance and novelty: Variations in composition, structure, and properties of Thai glutinous rice starches were observed, which could be adopted for a diverse array of end uses.Publication Metadata only Flavonoids profile, taxonomic data, history of cosmetic uses, anti-oxidant and anti-aging potential of alpinia galanga (L.) willd(2020-01-01) Duangjai Tungmunnithum; Nobuyuki Tanaka; Ayumi Uehara; Tsukasa Iwashina; National Museum of Nature and Science; Tamagawa University; Mahidol University© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Alpinia galanga is a well-known medicinal plant in Southeast Asia and has been used for a long time as food and medicine. A large number of flavonoid phytochemical compounds have been identified in various parts of this medicinal herb. Flavonoids are commonly known as attractive compounds that can be applied to cosmetic or cosmeceutical product development because of their antioxidant, anti-aging and many other potential biological activities. This recent review aims to illustrate and update the taxonomic status as well as the species description that will be helpful for a rigorous identification and authenticate the raw material or living specimen from A. galanga. The flavonoid phytochemical compounds and the bioactivity of this medicinal plant are also provided. The future perspectives and research directions of A. galanga and its flavonoids are pointed out in this study as well.Publication Metadata only Illegal logging listeners using IoT networks(2020-11-16) Ananta Srisuphab; Nopparat Kaakkurivaara; Piyanuch Silapachote; Kitipong Tangkit; Ponthep Meunpong; Thanwadee Sunetnanta; Kasetsart University; Mahidol University© 2020 IEEE. Protecting and increasing worldwide green space have been an international effort. Individuals and organizations are encouraged to plant urban trees and to get involved in many reforestation and restoration projects. Offsetting these much needed plans to save the forests is illegal logging. Trees that have grown for many years, some are protected resources inside restricted areas, are felled and the wood is smuggled. Watching for these illegal activities is very difficult and also very dangerous. It is quite impossible for rangers to patrol every entry and exit point of forests that cover thousands of squared kilometers. Applying Internet of Things technology to ecological forestry, we are proposing integrating sound acquisition networks and acoustic signal analyzers to enhance the robustness of an already successful camera-based surveillance solution that is also equipped with a global positioning system tracker. Our listener devices record sounds of the forest and periodically send it to a cloud storage over cellular networks. The device is affordable, the system is small and portable, and the network is flexibly extensible. From the data, acoustic features are extracted and visualized. The Mel-frequency cepstral coefficients of the signals have exhibited promising distinctiveness for detection of illegal chainsaw activities in the wild.Publication Metadata only Psychological impacts of COVID-19 during the first nationwide lockdown in Vietnam: Web-based, cross-sectional survey study(2020-12-01) Khanh Ngoc Cong Duong; Tien Nguyen Le Bao; Phuong Thi Lan Nguyen; Thanh Vo Van; Toi Phung Lam; Anh Pham Gia; Luerat Anuratpanich; Bay Vo Van; Ministry of Health Vitenam; Hanoi Medical University; Mahidol University; Viet Duc Hospital; Thong Nhat Hospital© Khanh Ngoc Cong Duong, Tien Nguyen Le Bao, Phuong Thi Lan Nguyen, Thanh Vo Van, Toi Phung Lam, Anh Pham Gia, Luerat Anuratpanich, Bay Vo Van. Originally published in JMIR Formative Research (http://formative.jmir.org), 15.12.2020. This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Formative Research, is properly cited. The complete bibliographic information, a link to the original publication on http://formative.jmir.org, as well as this copyright and license information must be included. Background: The first nationwide lockdown due to the COVID-19 pandemic was implemented in Vietnam from April 1 to 15, 2020. Nevertheless, there has been limited information on the impact of COVID-19 on the psychological health of the public. Objective: This study aimed to estimate the prevalence of psychological issues and identify the factors associated with the psychological impact of COVID-19 during the first nationwide lockdown among the general population in Vietnam. Methods: We employed a cross-sectional study design with convenience sampling. A self-administered, online survey was used to collect data and assess psychological distress, depression, anxiety, and stress of participants from April 10 to 15, 2020. The Impact of Event Scale-Revised (IES-R) and the Depression, Anxiety, and Stress Scale-21 (DASS-21) were utilized to assess psychological distress, depression, anxiety, and stress of participants during social distancing due to COVID-19. Associations across factors were explored using regression analysis. Results: A total of 1385 respondents completed the survey. Of this, 35.9% (n=497) experienced psychological distress, as well as depression (n=325, 23.5%), anxiety (n=195, 14.1%), and stress (n=309, 22.3%). Respondents who evaluated their physical health as average had a higher IES-R score (beta coefficient [B]=9.16, 95% CI 6.43 to 11.89), as well as higher depression (B=5.85, 95% CI 4.49 to 7.21), anxiety (B=3.64, 95% CI 2.64 to 4.63), and stress (B=5.19, 95% CI 3.83 to 6.56) scores for DASS-21 than those who rated their health as good or very good. Those who self-reported their health as bad or very bad experienced more severe depression (B=9.57, 95% CI 4.54 to 14.59), anxiety (B=7.24, 95% CI 3.55 to 10.9), and stress (B=10.60, 95% CI 5.56 to 15.65). Unemployment was more likely to be associated with depression (B=3.34, 95% CI 1.68 to 5.01) and stress (B=2.34, 95% CI 0.84 to 3.85). Regarding worries about COVID-19, more than half (n=755, 54.5%) expressed concern for their children aged <18 years, which increased their IES-R score (B=7.81, 95% CI 4.98 to 10.64) and DASS-21 stress score (B=1.75, 95% CI 0.27 to 3.24). The majority of respondents (n=1335, 96.4%) were confident about their doctor's expertise in terms of COVID-19 diagnosis and treatment, which was positively associated with less distress caused by the outbreak (B=-7.84, 95% CI -14.58 to -1.11). Conclusions: The findings highlight the effect of COVID-19 on mental health during the nationwide lockdown among the general population in Vietnam. The study provides useful evidence for policy decision makers to develop and implement interventions to mitigate these impacts.Publication Metadata only An IDS rule redundancy verification(2020-11-04) Piyawat Noiprasong; Assadarat Khurat; Mahidol UniversityCopyright © JCSSE 2020 - 17th International Joint Conf. on Computer Science and Software Engineering. Intrusion Detection System (IDS) is a network security software and hardware widely used to detect anomaly network traffics by comparing the traffics against rules specified beforehand. Snort is one of the most famous open-source IDS system. To write a rule, Snort specifies structure and values in Snort manual. This specification is expressive enough to write in different way with the same meaning. If there are rule redundancy, it could distract performance. We, thus, propose a proof of semantical issues for Snort rule and found four pairs of Snort rule combinations that can cause redundancy. In addition, we create a tool to verify such redundancy between two rules on the public rulesets from Snort community and Emerging threat. As a result of our test, we found several redundancy issues in public rulesets if the user enables commented rules.Publication Metadata only Cheaper currencies and long-term growth: The effect of exchange rate management and capital controls(2020-01-01) Phornchanok Cumperayot; Roy Kouwenberg; Chulalongkorn University; Erasmus School of Economics; Mahidol University© 2020 John Wiley & Sons Ltd In this paper, we test whether weakening the domestic currency can help boost economic growth. To estimate this policy-relevant but yet complex link, we apply a new mediation analysis to isolate the long-term growth effects of currency undervaluation induced by active exchange rate management and capital control policies. Using a dataset of 182 countries in the post-Bretton-Woods period, we find that changes in undervaluation driven by exchange rate management and capital control policies have no significant impact on long-term growth. In addition, the direct growth effects of these policies are typically negative and offset the small positive impact gained indirectly through increased currency undervaluation.Publication Metadata only Cosmetic potential of cajanus cajan (L.) millsp: Botanical data, traditional uses, phytochemistry and biological activities(2020-12-01) Duangjai Tungmunnithum; Christophe Hano; Mahidol University; Université d’Orléans; CNRS GDR3711© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Cajanus cajan (aka pigeon pea) is a terrestrial medicinal plant native to Asian and African countries before being introduced to the American continent. This protein-rich legume species, belonging to the Fabaceae family, has been traditionally used to cure various ailments in many traditional medicines. Recent works have highlighted it as a rich source of a wide array of flavonoids and other phenolic compounds. The major biological activities that are currently reported on are mainly focused on antioxidant and anti-inflammatory activities which are relevant for the cosmetic field. For example, hydroalcoholic extract from C. cajan has been highlighted as a particularly effective antioxidant in various scavenging assays for both reactive oxygen or nitrogen species. One of its constituents, cyanidin-3-monoglucoside, has been reported to suppress inflammatory cytokine production (e.g., TNF-α, IL-1β, and IL-6 in murine RAW264.7 macrophages). The present review provides an overview on the flavonoids and phenolics from C. cajan as well as their biological activities that can be applied for cosmetic applications. In addition, the botanical data including taxonomic description, flowering season, distribution, synonyms and traditional uses are illustrated, so as to provide an overview of pigeon pea’s cosmetic/cosmeceutical potentials.