SCOPUS 2020

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A preliminary investigation of maintenance contributions to commercial air transport accidents
(MDPI AG, 2020) Fatima Najeeb Khan; Ayiei Ayiei; John Murray; Glenn Baxter; Graham Wild; G. Wild; School of Engineering and Information Technology, University of New South Wales, Canberra, 2612, Australia; email: g.wild@adfa.edu.au
Aircraft maintenance includes all the tasks needed to ensure an aircraftÕs continuing airworthiness. Accidents that result from these maintenance activities can be used to assess safety. This research seeks to undertake a preliminary investigation of accidents that have maintenance contributions. An exploratory design was utilized, which commenced with a content analysis of the accidents with maintenance contributions (n = 35) in the official ICAO accident data set (N = 1277), followed by a quantitative ex-post facto study. Results showed that maintenance contributions are involved in 2.8 ± 0.9% of ICAO official accidents. Maintenance accidents were also found to be more likely to have one or more fatalities (20%), compared to all ICAO official accidents (14.7%). The number of accidents with maintenance contributions per year was also found to have reduced over the period of the study; this rate was statistically significantly greater than for all accidents (5%/year, relative to 2%/year). Results showed that aircraft between 10 and 20 years old were most commonly involved in accidents with maintenance contributions, while aircraft older than 18 years were more likely to result in a hull loss, and aircraft older than 34 years were more likely to result in a fatality. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Additive effect of a combination of artocarpus lakoocha and glycyrrhiza glabra extracts on tyrosinase inhibition in melanoma B16 cells
(MDPI AG, 2020) Tasanee Panichakul; Teerapat Rodboon; Prasit Suwannalert; Chanchai Tripetch; Rittipun Rungruang; Nattaporn Boohuad; Piyawan Youdee; T. Panichakul; Department of Cosmetic Science, Faculty of Science and Technology, Suan Dusit University, Bangkok, 228-228/1-3 Sirindhorn Rd. Bangplad, 10700, Thailand; email: tasanee_pan@dusit.ac.th
Artocarpus lakoocha (Al) and Glycyrrhiza glabra (Gg) extracts have been reported to show tyrosinase inhibitory activity and melanin pigment reduction. This is the first study to assess the combination of Al and Gg extracts in enhancing inhibition of tyrosinase and reduction of melanin pigments. Al and Gg extracted by maceration in 70% and 95% ethanol were analyzed for oxyresveratrol and glabridin using Ultra High Performance Liquid Chromatography. Extracts of Al and Gg singly and combinations of Al95 and Gg95 were tested for cytotoxicity, tyrosinase inhibitory activity, and reduction of melanin pigments in melanoma B16 cells. Al95 had higher antioxidant, tyrosinase inhibitory activity and reduced more melanin pigments in B16 cells compared to Al 70, and exhibited higher levels of oxyresveratrol. Gg95 inhibited oxidative stress and mushroom tyrosinase better than Gg70, and exhibited higher levels of glabridin. Combinations of Al95 and Gg95 at various ratios (concentration of 0.1 mg/mL) were not cytotoxic to B16 cells. Interestingly, Al95 and Gg95 combined at a ratio 9:1 reduced melanin pigment up to 53% in B16 cells. This combination of Al95 and Gg95 extracts exhibited the additive effect of reducing melanin pigments by suppressing the expression of microphthalmia-associated transcription factor (MITF), tyrosinase (TYR) and tyrosinase-related protein-2 (TRP-2) in B16 cells. The combination of Al and Gg extracts could be developed as skin care products for hyperpigmentation treatment. © 2020 by the authors.
Airport Related Emissions and their Impact on Air Quality at a Major Japanese Airport: The Case of Kansai International Airport
(Sciendo, 2020) Glenn Baxter; Panarat Srisaeng; Graham Wild
The objective of this study was to investigate the carbon dioxide (CO2) emissions of an airport, to determine if strategies are helping to achieve sustainability targets. Kansai International Airport was selected as the case study, and it is Japan's third largest airport and there was readily available comprehensive data to enable a study to be undertaken. The airport has a dedicated environmental division and has implemented various initiatives over the past decade or so to reduce the airport's impact on the surrounding environment, especially since it is in Osaka Bay. The research used an exploratory design, with an initial qualitative case study, followed by a quantitative longitudinal study, utilizing correlation to assess trends over time. Results showed statistically significant reductions in carbon dioxide (CO2) emission from the three facets of airport operations, both in terms of the number of passengers and number of aircraft serviced by the airport. As a result, the initiatives undertaken at Kansai International Airport could be adapted and used by other airports to help reduce their carbon dioxide emissions. © 2020 Glenn Baxter et al., published by Sciendo.
Antioxidant Activity and Allelopathic Potential of Lippia nodiflora (L.) Michx on Germination and Growth of Neptunia javanica Miq. seeds
(Research and Development Institute Suan Dusit University, 2020) Wipa Tupchiangmai; Wantana Mongkolvisut; W. Tupchiangmai; Department of Chemical Technology, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: wipa_tup@dusit.ac.th
The research objective was to evaluate the antioxidant activity, the allelopathic potential on germination growth of Neptunia javanica Miq. seeds and the total phenolic content (TPC) of crude extracts and fractions from Lippia nodiflora (L.) Michx. In this research, the ethanol crude extracts of leaves (LE), stems (SE) and roots (RE) from L. nodiflora were subjected to study the antioxidant activity by using DPPH free radical scavenging assay and the allelopathic potential on germination seeds of N. javanica. The RE extract had the highest antioxidant activity with IC50 value of 136.87 ppm. The allelopathic effect of LE extract at a concentration of 20 mg/mL completely inhibited the seed germination of N. javanica. The LE fractions were separated by liquid-liquid partition with hexane and ethyl acetate system to afford the leaf hexane fraction (LH), leaf ethyl acetate fraction (LEtOAc) and leaf hydroethanolic fraction (LW). The antioxidant, TPC and allelopathic activities of all fractions were investigated. The antioxidant activity of LW (158.21) and LEtOAc (175.45) fractions were better than those of LE (296.87) extracts, while LH fraction showed the lowest antioxidant activity at 722.08 ppm. The active allelopathic compounds in LEtOAc at a concentration of 10 mg/mL showed complete inhibition of radicle and hypocotyl on germination seed growth and 50% of seed growth inhibition (IC50) was 3.14 mg/mL. Crude extracts and fractions showed more inhibited radicle growth than hypocotyl growth of N. javanica seeds. The TPC of leaves crude extracts and fractions were the highest. Interestingly, the total phenolic content of LEtOAc fraction, was the highest (0.072 mg GAE/g) that was related to the good allelopathic properties, compared with other fractions and crude extracts. Our results indicate that the ethanolic crude extracts and an ethyl acetate fraction of L. nodiflora leaves can be applied to weed control, especially for N. javanica. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
Antioxidant properties of the extract from culture filtrate of schizophyllum commune
(Research Journal of Pharmacy and Technology, 2020) Janpen Tangjitjaroenkun; Rungnapa Tangchitcharoenkhul; J. Tangjitjaroenkun; Department of Resources and Environment, Faculty of Science at Sriracha, Kasetsart University, Chonburi, Sriracha Campus, Thailand; email: xjanpen@gmail.com
Schizophyllum commune mushroom is a wood decay fungus, widely consumed in traditional food and medicine. The study aimed to investigate the antioxidant activity, total phenolic and flavonoid content in the extract from culture filtrate of S. commune. Results showed that the total phenolic content present in the extract was found to be 672.17±9.55mg gallic acid equivalent (GAE)/g dry extract and total flavonoid content was 211.52±4.01mg quercetin equivalent (QAE)/g dry extract. The extract from culture filtrate of S. commune showed the highest free radical scavenging activity with IC50 values of 6.88±0.41 and 1.58±0.08µg/mL against DPPH and ABTS radicals, respectively. In FRAP assay, the extract showed high activity of 17,328.23±310.72mM Fe (II) equivalent/g dry extract. These results suggested that the extract from culture filtrate of S. commune can be used as a source of natural antioxidants and dietary supplements. © RJPT All right reserved.
Aphrodisiac Food Ingredients from the Twelve Thai Ancient Formulary Books of Police Captain Bhiam Bunyachot
(Research and Development Institute Suan Dusit University, 2020) Vadhana Jayathavaj; Ubol Chuensumran; V. Jayathavaj; Thai Traditional Medicine Program, Pathumthani University, Pathumthani, 10200, Thailand; email: vadhana.j@ptu.ac.th
An aphrodisiac is defined as any food or drug that arouses the sexual instinct, induces venereal desire and increases pleasure and performance. There are many commercial advertisements related to herbal supplements that claim to have an aphrodisiac property. But the claims almost always come from the long-standing belief or traditional wisdom (Chinese or Ayurveda) with no scientific support. To support Òfood is medicineÓ, the aphrodisiac herbs from Thai ancient drugs were explored from private formulary books. The properties of aphrodisiac formulas in the formulary texts were classified into four groups as follows: 1) anti-aging, 2) physical strength and power, 3) healthy sex, and 4) relief from erectile dysfunction. The herbs that appears in Thai foods in everyday life with claimed medication results from the formulary textbooks were identified. They were 49 food ingredients from 143 herbs presented in 62 aphrodisiac formulas. The herbs with herbal aphrodisiac groups (1 and 2 and 3 and 4) were ranked by the number of times they appeared thusly; Pepper, Galingale (Finger root), Ginger, Long pepper, and Nutmeg. The paper correlates the herbal foods traditionally used aphrodisiacs with recent scientific validation for the management of sexual health. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
ASSESSING THE CARBON FOOTPRINT OF A DEDICATED ALL-CARGO AIRLINE: THE CASE OF CARGOLUX INTERNATIONAL AIRLINES
(Universidade Federal da Paraiba, 2020) Glenn S. Baxter; G.S. Baxter; School of Tourism and Hospitality Management, Suan Dusit University, Huahin, Prachaup Khiri Khan, 77110, Thailand; email: g_glennbax@dusit.ac.th
The objective of this study was to examine Cargolux International Airlines, one of the worldÕs largest dedicated all-cargo airlines, carbon footprint and to identify how it has been influenced by its route network expansion and the operation of the next-generation, Boeing B747-8 freighter aircraft. The study covered the period 2005 to 2018. To achieve the objectives of the study, an in-depth qualitative longitudinal case study research approach was used. The data that was sourced for the study was examined using document analysis. The study found that Cargolux International Airlines annual carbon dioxide (CO2) emissions increased from 2,845,000 tonnes in 2005 to 4,093, 521 tonnes in 2018. The increase in the airlineÕs annual carbon dioxide (CO2) emissions is due to a higher level of services, route network expansion, and an increase its fleet of freighter aircraft. Over the study period, CargoluxÕs annual carbon dioxide emissions (CO2) per available tonne kilometer (ATK) exhibited a downward trend, decreasing from a high of 386.5 grams per available tonne kilometre (ATK) in 2006 to a low of 330.8 grams per available tonne kilometer (ATK) in 2018. A similar trend occurred with the airlineÕs annual carbon dioxide emissions (CO2) per freight tonne kilometer (FTK), which decreased from a high of 540 grams per freight tonne kilometer (FTK) in 2011 to a low of 330.8 grams per available freight tonne kilometer (FTK) in 2017. These trends were very favorable given the expansion in services and in enplaned air cargo tonnages throughout the study period. The case study revealed that the airlineÕs fleet rollover plan, in which Cargolux acquired a fleet of 14 state-of-the art Boeing B747-8 freighters, has resulted in the most substantial reductions in carbon dioxide (CO2) emissions. The more favorable fuel efficiency of this aircraft results in lower carbon dioxide (CO2) emissions for their operators. In addition to operating a modern fuel-efficient fleet, Cargolux has implemented a very broad range of measures and initiatives that are designed to mitigate its carbon footprint from both its flight and ground operations. © 2020 Journal of Urban and Environmental Engineering (JUEE). All rights reserved.
Carboxymethyl cellulose from rice stubble waste
(Prince of Songkla University, 2020) Pattrathip Rodsamran; Rungsinee Sothornvit; R. Sothornvit; Department of Food Engineering, Kasetsart University, Kamphaengsaen Campus, Nakhon Pathom, Kamphaeng Saen, 73140, Thailand; email: engrns@ku.ac.th
Rice stubble is an agricultural waste with 30.67% yield of cellulose (90.05% _-cellulose content) to be synthesized as carboxymethyl cellulose (CMC). Hemicellulose and lignin were first removed and later rice stubble cellulose was swollen in 30% NaOH and isopropanol as a solvent. Synthesis conditions such as chloroacetic acid content (5Ð7 g in 5 g of alkali cellulose), reaction temperature (50 and 70) and time (180, 270 and 360 min) were investigated to obtain CMC from rice stubble (CMCr). The 7 g of chloroacetic acid at 50 ûC for 180 min provided the best quality of CMCr based on 5 g of rice stubble cellu-lose with degree of substitution, viscosity and purity of 0.64, 36.03 cP and 90.18%, respectively. The presence of carboxymethyl substituents was verified by Fourier transform infrared spectroscopy. CMCr showed commercially low viscosity material and possibly used as a film forming packaging material for food and pharmaceutical products. >© (Publication Year), (publisher Name). All rights reserved.
Central thai food culture and acculturation during world war ii and the Vietnam war
(Chulalognkorn University, 2020) Ratiwan Watanasin; R. Watanasin; Department of Marketing, Faculty of Management Science, Suan Dusit University, Bangkok, Thailand; email: rwatanasin@yahoo.com
As food has a substantial cultural and economic value, globalization and the Internet have posed challenges to traditional culture. As previous research on Thai food has focused on recipes and the consumption behavior of the royal family and upper-class Thai citizens, this study therefore aims to investigate the Thai food culture of ordinary Thais before the proliferation of a foreign food culture. Senior citizens from diverse socio-economic backgrounds in central Thailand who witnessed two major cultural encounters, specifically World War ii and the Vietnam War, were interviewed until full data was obtained. Content analysis within the guidelines of consumer behavior analysis was conducted. The findings confirm that central food culture has been passed down over generations and has become firmly established. Unless there has been con-venient access to provincial centers, then, food from other regions has seldom been consumed. Also, before globalization, acculturation with foreign foods was barely no-ticeable. Overall, a key driver of this acculturation was so-called Òfood availabilityÓ. © koninklijke brill nv, leiden, 2020.
Chemical compositions of essential oils of Amomum verum and Cinnamomum parthenoxylon and their in vitro biological properties
(Nickan Research Institute, 2020) Janpen Tangjitjaroenkun; Rungnapa Tangchitcharoenkhul; Waraporn Yahayo; Suangson Supabphol; Ruengrit Sappapan; Roongtawan Supabphol; J. Tangjitjaroenkun; Department of Resources and Environment, Faculty of Science at Si Racha, Kasetsart University, Si Racha campus, Thailand; email: xjanpen@gmail.com
Introduction: In eastern Thailand, Amomum verum and Cinnamomum parthenoxylon are native plants used by local communities for their medical and culinary properties. This study determined the chemical composition and biological activities of the essential oils from A. verum shoots (AVS-EO) and C. parthenoxylon wood (CPW-EO). Methods: Essential oils were extracted using hydro-distillation and analyzed using gas chromatography-mass spectroscopy (GC-MS). The antimicrobial activity was evaluated using the disc diffusion method and broth microdilution assay. The cytotoxic activity of the essential oils was assessed against the human prostate adenocarcinoma (DU145) cell line using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The antioxidant activity of the essential oils was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2_-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assays. The expression of antioxidant genes in the DU145 cells was evaluated using quantitative real-time polymerase chain reaction (qRT-PCR). Results: 1,8-Cineole was the main component in AVS-EO and CPW-EO with 84.38, and 45.65 %, respectively. AVS-EO had stronger antimicrobial activity than CPW-EO. The lowest minimum inhibitory concentration (MIC) and minimum microbicidal concentration (MMC) values of AVS-EO against Candida albicans were 0.3125 and 2.5 mg/mL, respectively. Both essential oils had time-dependent and dose-dependent cytotoxic effects on the DU145 human prostate adenocarcinoma cells. CPW-EO had high antioxidant activity toward DPPH and ABTS radicals with IC50 values of 4.528 ± 0.233 and 0.045 ± 0.007 mg/mL, respectively. The two essential oils up-regulated glutathione peroxidase (GPx) and glutathione reductase (GRx) mRNA expression in the oxidative stress response of DU145 cells. Conclusion: AVS-EO and CPW-EO might be added as natural ingredients in food or dietary supplement products for the benefit of microbial and prostate cancer inhibition. © 2020 Nickan Research Institute. All rights reserved.
Circular economy approach for wastewater treatment farming in Bangpakong River basin
(IOP Publishing Ltd, 2020) N. Surinkul; S. Threedeach; W. Chiemchaisri; C. Chiemchaisri
Bangpakong River is one of river basins that faced the pollution problem in Thailand. This river is located in the downstream of central pain of Thailand and flows into the sea at the gulf of Thailand. Water quality problems in the last decade of this river basin are appeared from the low water quality index with evidences such as dead of fish, black color of water, low Dissolved Oxygen (DO) concentrations, high organics and nutrients concentrations, high contaminated of coliform bacteria. All wastewater is controlled by the environmental law. Only wastewater from agriculture part is not yet properly managed. The objective of this study was to quantify the mass and material flows in agricultural farms such as pig, fish and prawn farms. Circular economy concept as reuse of wastewater in agricultural farms was approached in scenario. Surveys, questionnaires and water samplings were taken for farms. Information and mass flows within the farms were analyzed. This study found that the main source of pollution from these farms mostly resulted from the effluent of wastewater in term of Biological Oxygen Demand (BOD) and Total Nitrogen (TN) loads, were discharged into the environment. The hot spot areas were canals which flow to the river. Mass flows in pig farm revealed that BOD and TN loads to the environment were 90, and 120 tons/year. In which, calculated thresholds were 30 and 60 tons/year for BOD and TN. Similar results also found from aquaculture farms which contributes BOD and TN loads of 187 and 77 tons/year for fish farms and 156 and 84 tons for prawn farms. In this study, calculated reuse as circular economy approach about 50% of farm wastewater to agricultural field could provide the key role of BOD and TN reduction to the environment, and meeting the threshold level. © 2020 Published under licence by IOP Publishing Ltd.
Development of Horse Mango (Mangifera foetida) Jam and Consumer Acceptance
(Research and Development Institute Suan Dusit University, 2020) Saowapan Palasuwan; Dudsadee Sapbua; S. Palasuwan; Program in Culinary Technology and Service, School of Culinary Art, Suan Dusit University, Trang Center, Huai Yot, Trang, 92000, Thailand; email: saowapan_pal@dusit.ac.th
The purposes of this research were to develop horse mango (Mangifera foetida Lour.) jam, to investigate the quality of the developed jam and consumer acceptance of horse mango jam. The methodology of research was conducted by studying three concentration levels (35%,45% and 55%) of ripe horse mango flesh suitable to be processed into horse mango jam and evaluating the jam properties: physical, chemical and microbiological quality and consumer acceptance of the jam. The experimental results indicated that ripe horse mango flesh could be suitably processed as jam, and that horse mango also had a unique smell. Furthermore, the quality of horse mango jam was investigated by measuring the quality of jam according to the Thai Community Product Standard (TCPS) criteria for coloring (L*a* b*) and spreadability used to deform the jam, it was found that 3 horse mango jams are concentrated in terms of color, odor and flavor, according to TCPS criteria: L*, a* decreased and b* increased when the concentration of horse mango jam increased. The texture of the jam decreased when the concentration of horse mango increased. Horse mango jam selection by sensory evaluation from 50 panelists found that horse mango jam 55% received the most favorable rating in terms of color, odor, flavor and overall liking and there was a significant difference with 35%, 45% jam (p <0.05). When using 55% horse mango jam for chemical and microbiological quality, it was found that jam contains the amount of _-carotene at 1.04 g, moisture at 28.5 g, ash 0.56 g protein 0.45 g, carbohydrate and fat 0.73 g per 100 grams of horse mango jam. The amount of microbes detected was not up to the standard of TCPS. For the acceptance of 100 consumers, consumers accepted 97% of jam and decided to buy horse mango jam at 76%. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
Effect of mixture ratio of food waste and vetiver grass on biogas production
(Chulalongkorn University - Environmental Research Institute, 2020) Mayura Srikanlayanukul; Parinda Suksabye; M. Srikanlayanukul; Faculty of Science, Maejo University, Chiang Mai, Thailand; email: mayura@mju.ac.th
The objectives of this research were to study the optimum percentage ratios of food waste and vetiver grass (Vetiveria zizaniodes (L.) Nash) for biogas production and process stability in anaerobic digestion system. The nine mixture ratios of food waste (FM) and vetiver grass (VG) were 100:0, 80:20, 75:25, 66.67:33.33, 50:50, 33.33:66.67, 25:75, 20:80 and 0:100. The biogas production was subjected to anaerobic batch with working volume of 1.8 L and had digestion time 60 d at 35 ± 2 ¡C. High specific methane yield of 0.30 L g-1 VS removed was obtained from the fermentation at ratio of FW:VG at 80:20 with C/N ratio of 28.20. The specific methane yield of the single digestion of food waste (100:0) and single digestion of vetiver grass (0:100) were only 0.18 and 0.11 L g-1 VS removed, respectively. It was found that the cumulative methane production of FW: VG ratio of 80:20 was increased 34.89% and 96.93% compared to single substrate of food waste and vetiver grass, respectively. The results also showed the highest COD, VS and TS removal with a percentage ratio of FW: VG at 80:20, while the single vetiver grass digestion was the lowest COD, VS and TS removal. VFAs/Total alkalinity ratio of all ratio of food waste to vetiver at digestion time 40 d remained in 0.0895±0.0007 to 0.1944±0.0027 were steadied for this digester. It can be concluded that co-digestion of food waste and vetiver improve the biogas yield and degradation efficiency. © 2020, Chulalongkorn University - Environmental Research Institute. All rights reserved.
Effect of zeolite on mechanical and barrier properties of pbat films for life extension of agricultural products
(Trans Tech Publications Ltd, 2020) Poonsub Threepopnatkul; Kamonchanok Wongsuton; Chonlada Jaiaue; Nattanan Rakkietwinai; Amnard Stittatrakul; Chanin Kulsetthanchalee; P. Threepopnatkul; Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom, 73000, Thailand; email: poonsubt@yahoo.com
In this research, the biodegradable film of poly(butylene adipate-co-terephthalate) (PBAT) would be used as the polymer matrix. The influence of zeolite (as the filler) type and content were investigated on the mechanical and barrier properties of film packaging. Zeolite was treated with (3-aminopropyl) trimethoxy silane. Films were produced by cast film extruder. Effects of different types of zeolite (5A and 13X) as well as zeolite loading (1-5 wt%) on mechanical properties and permeability of gases (oxygen, carbon dioxide and water vapor) of PBAT composites films have been extensively studied. Tensile properties of PBAT incorporated with zelolite 5A are higher than the one with zeolite 13X. In addition, increasing zeolite content into PBAT film is likely to improve YoungÕs modulus with the sacrifices of both tensile strength and percentage of elongation at break of PBAT film. For barrier properties, PBAT/zeolite 5A possessed lower permeation both of oxygen and carbon dioxide gases than PBAT/zeolite 13X. The effect of zeolite content plays a major role on oxygen and carbon dioxide permeability of composite films. PBAT/zeolite composite film could certainly extend the ripening period of Homthong bananas for approximately longer than one week. © 2020 Trans Tech Publications Ltd, Switzerland.
Effects of Exercise on Physical Performances among Frail Older Adults: A Review Study
(Research and Development Institute Suan Dusit University, 2020) Sattha Prakobchai; Rungnapa Pongkiatchai; Sresuda Wongwiseskul; S. Prakobchai; Faculty of Nursing, Suan Dusit University, Bangkok, 10300, Thailand; email: sattha_pra@dusit.ac.th
Frailty is a crucial concept in determining physiological reverses among older adults. Physical frailty can predict the vulnerability for community-dwelling older adults as the functional performance declines. Recently, nurses and health care professionals have implemented the strategies to enhance physical capacity among frail older adults. Even the clinical guidelines of physical activity and exercise recommendations are widely published, older adults still engage in a low level of physical exercise. It is notable that exercise intervention is effective way to prevent frailty. This review indicates that a combination of aerobic, resistance exercise, and multicomponent exercise can improve physical performance such as increase muscle strength, balance, muscle mass, gait speed and prevent falls. Frailty is a reversible condition. Therefore, encouraging older adults to perform physical exercise is needed to maintain physical functioning as well as promote quality of life. Nurses play a significant role in frailty recovering both in hospitals and in aged care facilities. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
Efficient use of energy resources on Malaysian farms
(Econjournals, 2020) Thitinan Chankoson; Kittisak Jermsittiparsert; Thitinant Wareewanich; K. Jermsittiparsert; Contemporary Peasant Society Research Unit, Social Research Institute, Chulalongkorn University, Bangkok, Thailand; email: kittisak.j@chula.ac.th
The purpose of this study is to discover an approach where the outputs of the farms are maximum at the minimal input. Malaysia is well known for its crop (such as rubber, rice, palm oil, tea). Prior studies show that due to the climate change, there are likely chances that the farms of Malaysia will go extinct. In this study, the main focus is to efficiently use the energy resources to save it for the future in a prolonged manner. The data was collected from the website of Department of Statistics Malaysia, Official Portal. The data was taken for rubber and crops category. In order to run the analysis, the non-parametric approach was used, which is also knows as data envelopment analysis. It is used to explore the efficient use of energy resources. The findings suggest that rubber farms are the most technical efficient as compared to other farms. Further, the results show that there are many factors that counts and sums up the efficiency of the farm. Whilst studying the technical efficiency, this study finds that the soil and climate conditions contributes to the efficiency and productivity of the farms. © 2020, Econjournals. All rights reserved.
English Learning Management of Generation Z Learners with Active Learning
(Research and Development Institute Suan Dusit University, 2020) Rattana Klinjuy; R. Klinjuy; Faculty of Humanities and Social Sciences, Suan Dusit University, Lampang Center, Lampang, 52100, Thailand; email: rattana_kli@outlook.com
This article aims to present the guidelines of learning management in an English course that meets the context and satisfies the needs of Generation Z learners with active learning. Active learning is a form of learning by doing. It provides the learners with reading, writing, interacting, and analyzing problems. The learners will be provided with advanced thinking processes such as synthesis, analysis, and evaluation. In this article, the author describes the characteristics and the techniques for learning management, including the benefits of active learning to find the approaches that can be adapted to English teaching and learning. Moreover, the author views active learning as the most suitable teaching method for Generation Z learners. The article shows their learning styles and their needs of learning based on the concept of generational theory for Generation Z learners, linking learning management with active learning. The author, therefore, views that the concept of generational theory enables the instructor to organize an effective active learning process in English to achieve the curriculum learning outcome and also meet the needs of Generation Z learners. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
Examining TouristsÕ Attitude Towards the Religious Tourism in Thailand
(GMP Press & Printing Co.,, 2020) Jirawat Anuwichanont; Sirivan Serirat; Panisa Mechinda; Paiboon Archarungroj
To date, the religious tourism, one of the fastest emerging modes of tourism in Thailand, not only boosts domestic travel but also contributes significantly to the promotion of Dhamma practice to visitors according to Buddhist principles. Consequently, the examination of the factors as well as touristsÕ underlying expectation and perception influencing the religious tourism, including merit-making and Dhamma-practicing tourism, is vital for the sustainable development of this mode of tourism. Thus, this study was aimed to: (1) explore the influence of the activities related to precepts, meditation and wisdom on meritorious actions and defilements of merit-making tourists and Dhamma practitioners; (2) explore the factors influencing overall satisfaction and future behavioral trends of merit-making tourists and Dhamma practitioners; and (3) compare the differences between expectations and perceptions towards tourism activities. The empirical findings supported the activities related to precepts, meditation and wisdom as the determinants of meritorious actions and defilements as hypothesized. It was noted that the attitudes towards merit-making innovations and Dhamma learning and practicing innovations were found to be the most powerful determinants of overall satisfaction and future behavioral trends. Lastly, expectation and perception towards tourism activities were significantly different. Marketing implications were discussed. Copyright © 2020 GMP Press and Printing.
Existence and multiplicity of positive solutions to a system of fractional difference equations with parameters
(Springer, 2020) Pimchana Siricharuanun; Saowaluck Chasreechai; Thanin Sitthiwirattham; T. Sitthiwirattham; Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: thanin_sit@dusit.ac.th
We consider a fractional difference-sum boundary problem for a system of fractional difference equations with parameters. Using the Banach fixed point theorem, we prove the existence and uniqueness of solutions. We also prove the existence of at least one and two solutions by using the KrasnoselskiiÕs fixed point theorem for a cone map. Finally, we give some examples to illustrate our results. © 2020, The Author(s).
Existence and stability analysis for fractional impulsive caputo difference-sum equations with periodic boundary condition
(MDPI AG, 2020) Rujira Ouncharoen; Saowaluck Chasreechai; Thanin Sitthiwirattham; S. Chasreechai; Department of Mathematics, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand; email: saowaluck.c@sci.kmutnb.ac.th
In this paper, by using the Banach contraction principle and the Schauder's fixed point theorem, we investigate existence results for a fractional impulsive sum-difference equations with periodic boundary conditions. Moreover, we also establish different kinds of Ulam stability for this problem. An example is also constructed to demonstrate the importance of these results. © 2020 by the authors.

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