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ASEAN Journal on Science and Technology for Development

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Published by Universitas Gadjah Mada

ISSN : 22249028 EISSN : 22249028 DOI : -

Core Subject : Science, Education, Engineering,

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Mathematics

The coverage is focused on, but not limited to, the main areas of activity of ASEAN COST, namely: Biotechnology, Non-Conventional Energy Research, Materials Science and Technology, Marine Sciences, Meteorology and Geophysics, Food Science and Technology, Microelectronics and Information Technology, Space Applications, and Science and Technology Policy, Infrastructure and Resources Development.

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Articles 6 Documents

Search results for , issue "Vol. 36 No. 2 (2019): Across the Archipelago" : 6 Documents clear

Stable Carbon Isotope Signature of Particulate Organic Matter in the Southwestern Sumatran Waters of the Eastern Indian Ocean A'an Johan Wahyudi; Afdal Afdal; Hanny Meirinawati
ASEAN Journal on Science and Technology for Development Vol. 36 No. 2 (2019): Across the Archipelago
Publisher : Universitas Gadjah Mada

The Southwestern Sumatran Waters of the Eastern Indian Ocean are known to be affected by the South Java Current and the South Equatorial Counter Current. Many studies have been carried out in relation to upwelling and the Indonesian Through Flow. However, there has been no systematic study into the properties of the particulate organic matter in the Southwestern Sumatran Waters. Therefore, the organic matter in these waters in terms of its origin is unknown. As part of the Widya Nusantara Expedition 2015 research cruise, this study aimed to examine the stable isotope ?13C signature of particulate organic matter (POM), especially with regards to the origins of the organic matter. The stable isotope ?13C is complemented by other variables such as chlorophyll-a, particulate organic carbon (POC), and nutrients (phosphate, silicate, ammonium and nitrate). The POC tends to be depth-dependent. The values of ?13C are ?23.56, ?24.30 and ?24.06‰ for 5, 100 and 300 m depths, respectively. We found that POM tended to be isotopically lighter with increasing POC and chl-a, especially in the surface water, potentially due to the preferential lighter carbon isotope for metabolism by the primary producer. The origin of POM in the Southwestern Sumatran waters is marine end-member in the surface (up to 100 m depth) and mixed compositions at the surface of twilight zone (100–300 m depth). The next layer, i.e. twilight zone (more than 300 m depth), is terrigenous end-member. The surface POM of SSW, as shown in 5 m depth, is not freshly produced and tends to be either autochthonous or allochthonous.

Land Suitability Analysis for Housing in Pesisir Selatan Regency, West Sumatra, Indonesia Dyah Widiyastuti; Heni Ermawati; Lambang Septiawan; Ignatius Salivian Wisnu Kumara
ASEAN Journal on Science and Technology for Development Vol. 36 No. 2 (2019): Across the Archipelago
Publisher : Universitas Gadjah Mada

Increases in the numbers of residents in a given location have the consequence of increasing the need for living space. However, diverse environmental conditions make it impossible to develop housing in every location. Spatial analysis is therefore useful in determining land suitability for housing development so that environmental problems are avoided. The aims of this study were to determine the projected land needs for housing in Pesisir Selatan Regency, West Sumatra, Indonesia, as well as to perform suitable area mapping for housing through spatial analysis using five physical parameters (slope, disaster vulnerability, river and beach border, and protected area). The results showed that the land needed for housing in Pesisir Selatan increased every year. By 2020, it is predicted that the land allocation for housing will be 15.6–51.15 km2. Based on the spatial analysis, 21.657% of the area had high suitability (S1) for housing, 18.616% had moderate suitability (S2), 6.782% had low suitability (S3), and 52.944% was not suitable (N1). It is predicted that in 2020, the government will have to use the low suitability area despite its more significant risks. Therefore, it will be necessary to pay attention to mitigation aspects and housing technique manipulation in the steep slope area.

Developing Alternative Mangrove Ecosystem Management Scenarios through Economic Valuation in the Coastal Area of Jangkaran Village, Kulon Progo Regency, Indonesia Dwike Ariestantya; Rika Harini
ASEAN Journal on Science and Technology for Development Vol. 36 No. 2 (2019): Across the Archipelago
Publisher : Universitas Gadjah Mada

Mangrove ecosystems have multiple functions, including economic and environmental ones. For optimal benefits, mangrove ecosystem management should be well-proportioned. The purpose of this study was to determine the most appropriate scenario for managing a mangrove ecosystem alongside aquaculture ponds, by performing an economic valuation to find out the value of management with the most beneficial scenarios, both ecologically and economically. Data were collected through interviews using questionnaires, literature reviews, and institutional data. These data were then processed through economic valuations of the total economic value and cost-benefit analysis. Data were analysed spatially and descriptive-quantitatively. The total economic value of the mangrove ecosystem was USD 6.73 million. The benefit and costs of managing mangrove ecotourism were USD 3,930.74/ha/year and USD 1,701.69/ha/year, respectively, whereas the benefits and costs of managing ponds were USD 150,433.85/ha/year and USD 55,269.46/ha/year, respectively. The prioritized scenario of mangrove ecosystem management is one with an ideal proportion of mangrove and pond areas (i.e. 50:50) and the total ecological and economic benefits for a period of 25 years is USD 19.17 million.

Poverty Approach and How to Reduce it with an Agropolitan Program in Gorontalo Province, Indonesia Aulia Ika Rahmawati; Lutfi Ardianti; Salma Hayyu Nur Husna; Eni Paryani; Nur Amrina Rosidhah; Tiara Putri Amalia; Ratih Fitria Putri
ASEAN Journal on Science and Technology for Development Vol. 36 No. 2 (2019): Across the Archipelago
Publisher : Universitas Gadjah Mada

This study aimed to explain the conditions of poverty in Gorontalo Province, Sulawesi, Indonesia, to identify the causes of poverty in the province, and then to propose efforts to reduce this poverty. Data related to human and economic resources were used in the analysis. The condition of poverty was seen through the DPSIR approach, which consists of the driver (D), pressure (P), state (S), impact (I), and response (R). Poverty in Gorontalo Province could be reduced by utilizing the occupation that dominates the population, which is in agriculture sector. Therefore, developing an agropolitan system is a solution. In the first stage, the location quotient (LQ), shift share (SS), and Klassen typology methods were used to determine regencies or cities that have the potential to develop an agropolitan system. The results of the analysis showed that there were two districts that have the potential to develop agropolitan systems, namely Pohuwato Regency and Gorontalo Regency. Efforts to reduce poverty in Gorontalo Province with an agropolitan system can be continued with a second stage consisting of the preparation of products and forms of management organizations, and a third stage in the form of strengthening human resources.

Spatial Trends of Urban Physical Growth of Cities in Java, Indonesia, 1975–2015 Djaka Marwasta
ASEAN Journal on Science and Technology for Development Vol. 36 No. 2 (2019): Across the Archipelago
Publisher : Universitas Gadjah Mada

This paper discusses the spatial trends of urban physical growth of several cities in Java. Six cities in Java (Jakarta, Bandung, Semarang, Yogyakarta, Surabaya, and Malang) were chosen as samples to represent the characteristics of cities in Java based on their geographic settings, including their topography, size, population density, and history of their development. The objectives of this study were: (1) to understand the variations in physical growth of cities in Java; and (2) to explain the spatial trends of urban physical growth of these cities based on their geographic settings. Multi-temporal Landsat satellite images were chosen as data sources to identify urban morphological development processes. Based on results of analysis, it was found that the physical growth of cities in Java has had relatively diverse variations in the aspects of urban settlements, infrastructure, and urban functions. However, the diversity of urban physical growth can be simplified into four types based on the dominant form of physical development. These four types were found to be (1) a compact-rounded city that is formed by the domination of a densification process; (2) a spread-elongated city formed by the dominance of an extensification process; (3) a compact fan-shaped city that is formed by natural physical conditions; and (4) a scattered-random city formed by the domination of a leapfrogging process.

Analytical Hierarchy Process for Regional Development Priority in Maluku Province, Indonesia Lia Amellya Larasati; Nur Medisyanning Khoiruluswati; Rizki Rahmi Aliyya; Unggul Widyanarko; Ratih Fitria Putri
ASEAN Journal on Science and Technology for Development Vol. 36 No. 2 (2019): Across the Archipelago
Publisher : Universitas Gadjah Mada

Maluku is one of the provinces of the eastern part of Indonesia, consisting of 11 regencies. The Maluku branch of Statistics Indonesia reported in 2018 that in 2013–2018 the number of poor people in Maluku's rural areas increased by 1,970. Concurrently, the number of poor people in urban areas decreased by around 6,070 people. This fact showed that development in Maluku Province hadn't been implemented effectively and equally. This study aimed to determine the development priority in Maluku Province using the Analytical Hierarchy Process method. The determination of priorities was based on three aspects in the human development index concept, namely education, health, and economy. Data from Statistics Indonesia on life expectancy, mean years of schooling, expected years of schooling, and per capita expenditure were the indicators were used as the indicators in this study. The results showed that there were 10 regencies with a high level of priority, with the exception being Ambon City, which had a low-level priority. Classification of regencies showed that there was a disparity between them. These findings can help to inform future development designs in Maluku Province.

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