https://ajstd.org/index.php/ajstd/issue/feed ASEAN Journal on Science and Technology for Development 2021-04-30T23:50:19+07:00 Widodo ajstd.journal@gmail.com Open Journal Systems <h2>About the <em>ASEAN Journal on Science &amp; Technology for Development</em></h2> <p style="font-weight: 300; font-size: 1.01rem;">Jointly published by the ASEAN Committee on Science and Technology and the Ministry of Research, Technology, and Higher Education of the Republic of Indonesia, the <em>ASEAN Journal on Science &amp; Technology for Development</em> (print ISSN 0217-5460; online ISSN 2224-9028) is a peer-reviewed open access journal focusing on the publication of articles that make positive, tangible contributions to science and technology in the ASEAN region. Its main aim is to promote and Google Scholar, ID Scopus, ResearchGate, Orcid), accelerate the discovery and ultimate ASEAN-wide application of scientific and technological innovations, the consequence of which should be greater prosperity for the people of Southeast Asia.</p> <p style="font-weight: 300; font-size: 1.01rem;">AJSTD covers a wide range of technology-related subjects in the context of ASEAN, including biotechnology, non-conventional energy research, materials science and technology, marine sciences, meteorology and geophysics, food science and technology, microelectronics and information technology, space applications, science and technology policy, and infrastructure and resources development.</p> <h2>About The ASEAN Committee on Science and Technology</h2> <p style="font-weight: 300; font-size: 1.01rem;">The ASEAN Committee on Science and Technology was established to strengthen and enhance the capability of ASEAN in science and technology so that it can promote economic development and help achieve a high quality of life for its people. Its terms and reference are:</p> <ul class="asean-terms" style="font-weight: 300; font-size: 1.01rem;"> <li class="show">To generate and promote development of scientific and technological expertise and manpower in the ASEAN region;</li> <li class="show">To facilite and accelerate the transfer of scientific and technological development among ASEAN countries and from more advanced regions of the world to the ASEAN region;</li> <li class="show">To provide support and assistance in the development and application of research discoveries and technological practices of endogenous origin for the common good, and in the more effective use of natural resources available in the ASEAN region and in general; and</li> <li class="show">To provide scientific and technological support towards the implementation of existing and future ASEAN projects.</li> </ul> <p style="font-weight: 300; font-size: 1.01rem;">Further information about the activities of ASEAN COST can be <a class="border-hover" href="http://astnet.asean.org/index.php?option=com_content&amp;view=categories&amp;id=8&amp;Itemid=130" target="_blank" rel="noopener">found on its website</a>.</p> https://ajstd.org/index.php/ajstd/article/view/653 Spurring Economic Growth in Terms of Happiness, Human Development, Competitiveness and Global Innovation: the ASEAN Case 2020-10-26T15:32:36+07:00 Saida Zainurossalamia ZA saida.zainurossalamia.za@feb.unmul.ac.id Siti Amalia siti.amalia@feb.unmul.ac.id Dio Caisar Darma diocaisar@stiesam.ac.id Musdalifah Azis musdalifah.azis@feb.unmul.ac.id <p>Happiness, human development, level of competitiveness, and capacity in innovation all play an important role in spurring long-term sustainable economic growth. This study presents the relationship between these factors—happiness, human development, competitiveness, and innovation in the ASEAN region—in how they influence economic growth. To date, there has been a lack of research on this specific issue, and thus it is an interesting and little-known one to study. Panel data were used comprising a combination of time series and cross-sections. The object of the study was ASEAN member countries using the multiple linear regression method. For the years of 2013–2019, we found that overall economic growth had a real impact. The results showed that human development and global innovation are two-way related to economic growth (positive and significant). Conversely, there was an insignificant influence of happiness and competitiveness on economic growth. Competitiveness, in particular, can reduce the level of economic growth. The policy considerations pursued by countries in ASEAN are through the respective governments’ strategic steps to improve the productivity of their populations, because human resources are needed not only as objects but actors in economic activities themselves in managing development.</p> 2021-04-30T00:00:00+07:00 Copyright (c) 2021 The Author(s) https://ajstd.org/index.php/ajstd/article/view/652 Investigation of the Distribution of the Daytime Employed Population of Yangon, Myanmar, with and without the Impact of Work from Home 2020-10-30T11:07:21+07:00 Ye Wint Aung eloriche.mm@gmail.com San San Myint eloriche.mm@gmail.com <p>Work from home (WFH) has gradually become popular since Covid-19 started its transmission in Myanmarduring the first quarter of 2020. It re-evaluated the culture of ‘a work space’ and a significant change has occurred to the pattern of day-time distribution of the employed population. In this paper, network distribution model was built with three constraints, Distribution Bias 1, 2 and 3. These biases were determined through questionaries, survey data collections of responses from Yangonites and geographical data of urban employment cores. These percentile biases influenced the amount of employed population per distribution times and gave rise into two results. One was the ordinary day-time employed population ODEP and another was the improved day-time employed distribution IDEP (considering WFH). These two results were compared and contrasted with coefficient of variations, t-tests and other correlation methods to determine the effect of WFH on the day-time employed population. With survey data, it was clarified that majorities in Yangon do favor work from home as an alternative option for future employment. Subsequently, compared results revealed that work from home significantly decreased the amount of employment distribution and the amount of such decrements were more consistence and have less variations, thence, reduce cramming during day-time distribution.</p> 2021-04-30T00:00:00+07:00 Copyright (c) 2021 The Author(s) https://ajstd.org/index.php/ajstd/article/view/644 Optimum Medium for Lipase Production by Lipolytic Filamentous Fungi Isolated from Kendari Landfill Soil 2021-03-10T17:03:33+07:00 Nur Rayani rayaninur@yahoo.co.id Miftahul Ilmi m.ilmi@ugm.ac.id <p>Lipase produced by <em>Aspergillus</em> is widely known and used in many industrial sectors. Three lipolytic filamentous fungi had been isolated from Kendari (Southeast Sulawesi, Indonesia) landfill soil in previous study and identified as <em>Aspergillus niger </em>KE1<em>, Aspergillus terreus </em>KC1, and <em>Aspergillus fumigatus </em>KE6. However, the optimization of these isolate has not been reported. In this study, statistical optimization is selected because of more effective, efficient, economical, robust in giving the results and the possibility of analysing the interaction effects among factors. Three lipolytic isolates were screened in initial medium to obtain the highest lipolytic isolate and it was used in medium optimization process. Optimization was done using the series experimental design of Taguchi and RSM. Optimization was sucessfully obtain the optimum medium with the reduction of medium component from previously medium reported. <em>Aspergillus niger</em> KE1 is the selected isolate with the highest lipase productivity after 72 h in initial medium. The significant factors affected lipase production are peptone, olive oil, glucose and MgSO<sub>4</sub>.7H<sub>2</sub>O. The model equation obtained is Y = 1043 – 228 A + 300 B – 19803 C + 99 A*A + 5720 B*B + 292855 C*C – 979 A*B + 6563 A*C – 56338 B*C. This model predicts the lipase productivity succesfully with R<sup>2</sup> of 96.9%. The optimized medium composes of peptone 2%, olive oil 0.1%, glucose 0.5% and MgSO<sub>4</sub>.7H<sub>2</sub>O 0.075%. Using the medium, the lipase productivity increases 4.7-folds compared with before optimization. Our results suggest that <em>Aspergillus niger</em> KE1 is a potential lipase source which catalyse the esterification reaction. Further research is needed to purify and characterize the lipase enzyme of this isolate.</p> 2021-04-30T00:00:00+07:00 Copyright (c) 2021 The Author(s) https://ajstd.org/index.php/ajstd/article/view/649 Seismic Safety Assessment of Existing Low-rise RC Buildings with Rapid Visual Screenings and Preliminary Evaluation Methods 2021-04-07T15:26:26+07:00 Moe Myat Myat Aung moe040604@gmail.com Mya Nan Aye myananaye@gmail.com <p>Mandalay, the second largest city in Myanmar, is situated near the Sagaing Fault (the major fault in Myanmar) and so it’s a seismic prone area. In Mandalay region, the number of low-rise buildings is much more than that of high-rise buildings. And hence, the seismic safety assessment of low-rise building takes an important role to survive and develop Mandalay as smart city. Detailed seismic evaluation can determine the seismic performance level of the buildings and can give strategies to technically retrofit the structures. First of all, rapid visual screening and preliminary evaluation must be carried out to identify the buildings which need the detailed assessment. Thus, in this study, the rapid visual screening (RVS) and preliminary evaluation will be executed for 26 number of three to eight story RC buildings are investigated for the requirements of detailed assessment with three different RVS and preliminary evaluation methods. The methods used are FEMA P-154, Indian standards and Bangladesh methods. According to the investigation, the results given by FEMA P-154 level 1 and level 2 are more vulnerable than that of other methods. Seismic elevation using seismic index method by Bangladesh can give a reliable data for detail seismic evaluation and retrofit method.&nbsp; &nbsp;&nbsp;&nbsp;</p> 2021-04-30T00:00:00+07:00 Copyright (c) 2021 The Author(s) https://ajstd.org/index.php/ajstd/article/view/643 HEC-HMS Models for Urban Flood Analysis in Belik River, Yogyakarta, Indonesia 2020-09-29T05:33:49+07:00 Slamet Suprayogi ssuprayogi@ugm.ac.id Rifa'i rifai_geo@mail.ugm.ac.id Reviana Latifah ssuprayogi@ugm.ac.id <p>The rapid development of Yogyakarta has made city development increase. This construction continues to expand the reach of impervious surfaces. As a result, the surface runoff and maximum discharge have increased, overflowing up to urban drainage. This study aimed to analyze the maximum discharge of the watershed based on design storms with 2, 5, 10, and 25-year return periods, used for flood control considerations. The urban flood was modelled using HEC-HMS. The results showed, the contribution of discharge flow in each segment is influenced by the dominance of land use, in which the segment dominated by dense settlements has a high contribution to the maximum discharge. The flow contribution is due to the high CN value which corresponds to the high surface runoff.</p> 2021-04-30T00:00:00+07:00 Copyright (c) 2021 The Author(s) https://ajstd.org/index.php/ajstd/article/view/630 Anticipating Ocean Deoxygenation in the Maritime Continent of Southeast Asia 2020-07-09T10:04:23+07:00 Ita Wulandari ita.wulandari@lipi.go.id A'an J. Wahyudi aanj001@lipi.go.id Karlina Triana karlina.triana@gmail.com <p>Oxygen plays an essential role in the biogeochemical process and ocean productivity, especially during the recent trend of ocean warming. However, deoxygenation as a consequence of climate change receives less attention than ocean acidification and warming. Therefore, understanding the deoxygenation as an effect of ocean warming is indispensable. The maritime continent waters of Southeast Asia are well known on marine biodiversity and geolocation unique features that are inevitably impacted by climate change. This condition will suffer more due to less oxygen on the marine water. This review focuses on observing oxygen depletion changes and hypoxia in the maritime continent area, its potency, effect, and recommendation on how to monitor deoxygenation. Based on previous research, the Bay of Bengal has been affected by oxygen depletion, and climate change increases this hypoxic area. In other locations, coastal hypoxic occurred seasonally. However, dominating big cities in the coast area increase the vulnerability of hypoxic zones such as in Sangga Besar River Estuary, Bolinao and Anda Coastal, Manila Bay, Jakarta Bay, Cambodian Waters, and Bengal Bay. Deoxygenation mitigation is an initial step in anticipating global climate change. The monitoring of the hypoxic area is needed to inform the threat of the deoxygenation on the maritime continent of SEA.</p> 2021-04-30T00:00:00+07:00 Copyright (c) 2021 The Author(s)