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INDONESIA
Surya Octagon Interdisciplinary Journal of Science and Technology
Published by Universitas Surya
ISSN : 24608777     EISSN : 26155192     DOI : -
SOIJST (Surya Octagon Interdisciplinary Journal of Science and Technology) is a bilingual interdisciplinary journal that publishes original research on science and technology in Indonesia. SOIJST is organized by Surya Universisty. Interdisciplinary offerings reflect breakthrough research, as well as new directions of knowledge creation in four scopes: Life Sciences, Engineering, Socioeconomics, and Information & Communication. All of which explore the technology-oriented methods to offer solutions in ways that are inspirational and intellectually engaging. SOIJST was first published in 2015 and 2016. Due to change process of management, in the 2nd dan 3rd year, SOIJST did not released any volume. Starting from 2018, the further publication would be released for the next volumes.
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Articles 14 Documents
Adsorption and Dissociation of H2S on V(110), Pd(111) and Pd overlayer on V(110) Surfaces: A Density Functional Theory Study Mahyuddin, Muhammad Haris
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 1 (2015): SOIJST
Publisher : Surya University

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Abstract

An interesting prospective pseudomorphic overlayer on bcc surface material as implemented in Pd pseudomorphic overlayer on V(110) surface has been introduced in the frame work of first-principles calculation. Adsorption and decomposition of H2S molecule were calculated on this overlayer structure. In comparison, we also calculated them on their bare V(110) and Pd(111) surfaces. It was found that Pseudomorphic overlayer surface structure weakened the adsorption energy of H2S, SH, S and H compared to its bare Pd(111) and V(110) surfaces. Furthermore, Pd/V(110) surface was found to have higher activation energy barrier for H2S and SH dissociation than its bare Pd(111) and V(110) do. Pd/V(110) surface is predicted to be a promising catalyst membrane used in gas-shift reactor technology because besides its advantage to absorb hydrogen with very high permeation coefficient, sulfur atom is predicted to be adsorbed in a limited amount.
Dampak Kebijakan Investasi dan Perdagangan Kayu Bulat terhadap Kinerja Hutan Taman Industri di Indonesia Rukmantara, Rukmantara
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 1 (2015): SOIJST
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The objective of the research is to comprehend the effect of investment and trade policies on forest plantation investment development in Indonesia.  In 1990 the government issued Forest Plantation (HTI) policy which aimed at accelerating the growth of HTI investment. However the change of economy and political circumstances in 1997/1998 has led to the change of investment policies on HTI such as discontinued access on Government investment facilities and interest free of loan, a continue forest clearing for HTI, and ban on roundwood export.  Those policies were the source of  market competitiveness to fall and further discouraged HTI investment developmment. The research recommends to reform current policies by combining to open round wood export and provide soft loan followed by termination of forest clearing (conversion natural forest to HTI area) policy.  By this approach, the government has great opportunity to accelerate investment growth on forest plantation, increase economic- financial efficiency, and socio economic benefits.
Application of Lattice-Gas Model to the Simulation of Complex Economical Systems Juwono, Tjipto
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 1 (2015): SOIJST
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The lattice-gas model simulations are being used to reproduce the collective behavior of complex economic systems. By correlating different manifestation of the collective behaviors to the parameter changes in the simulation, we identify the underlying mechanism of the various manifestation of the collective behavior. The standard growth model is reproduced by the model with non-interacting agent. As we introduce interacting agents, the growth model departs from the standard.  Using cluster labeling algorithm we obtain number density histograms and diversity to explain the underlying mechanism of the growth dynamics.
Nawa Cita Jokowi-JK dalam Paradigma Pembangunan Ekonomi Syamsi, Syam Surya
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 1 (2015): SOIJST
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Nawacita are 9 (nine) main programs and the foundations of Indonesias development paradigm in the era of President Joko Widodo. Nawacita trying to get out of mainstream development paradigm since the New Order era to the post-reform which is the paradigm of growth. Development priorities not only about growth but also confirms the presence of state and government in society, expanding equitable development which reducing the waiver of public services. Another priority is to build economic independence and maintain cultural values through a mental revolution and the continuing restoration of the Nation. This research aims to interpret and analyze the Nawacita position in this line of thought emerging the development of paradigm in the global world and analyze potential bottlenecks in its operation activities. Research carried out by the analysis of literature through qualitative research methodology hermeneutics phenomenology. The results showed that Nawacita is sustainable and human development paradigm, but in its operation would face obstacles, especially from the bureaucratic apparatus and work culture..
Analisis Diagram T-S Berdasarkan Parameter Oseanografis di Perairan Selat Lombok Harvianto, Loecky; Parengkuan, Maxi; Koropitan, Alan F.; Agustiadi, Teguh
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 1 (2015): SOIJST
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Research of water masses by using conductivity temperature depth are conducted in the Lombok Strait during September 2014 under the Cruise SITE Leg II to Lombok Strait. The aim of the research is to investigate Temperature-Salinity Diagram based on oceanographic parameters in Lombok Strait. Temperature-Salinity Diagram shows the origin of the water masses across Lombok Strait. The results of this research shows water masses across Lombok Strait comes from North Pacific Subtropical Water (NPSW) on ~ 150 m depth and North Pacific Intermediate Water (NPIW) on ~ 400 m depth. The differences values of salinity reference and salinity measurement indicates the properties of NPSW and NPIW are dynamic, verified by the number of salinity reference is 34,55 Psu on ~ 150 m depth, whereas the salinity number of five station in order are  34,63 Psu; 34,65 Psu; 34,65 Psu; 34,57 Psu; 34,52 Psu. The difference of salinity number caused by strong vertical mixing in Indonesian waters.
Bio-degradeable Bioplastics sebagai Plastik Ramah Lingkungan Wijayanti, Kim Poppy; Dermawan, Nathanael; Faisah, Sabila Nur; Prayogi, Vincent; Judiawan, William; Nugraha, Tutun; Listyorini, Niken Taufiqurrahmi
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 2 (2016): SOIJST
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Massive uses of conventional plastics have brought negative consequences to the aspects of sustainability and environmental friendliness of human activities, due to the problems concerning the availability of its raw materials and eventual wastes. One of the solutions to face these problems is by producing and using plastics that can degrade and be derived from renewable biomasses which are now known as bio-degradeable bioplastics.  At least, there are 4 kinds of plastics that can fulfill the criteria as being bio-degradeable bioplastics, namely starch-based plastic, cellulose-based plastics, PLA (polylactic acid), and PHA (polyhydroxylalkanoates). These four kinds of plastics have different characteristics, applications, strengths, and also weaknesses. In spite of the many challenges  in the uses of  bio-degradeable bioplastics to replace conventional plastics, newest technological development and the birth of stronger public awareness towards a more sustainable and more environmentaly-friendly life style have given stronger stronger forces to increase the uses and urgency of bio-degradeable bioplastics.
A Review of Nanotechnology Application for Seawater Desalination Process Jordan, Evan; Jessica, Jessica; Martin, Martin; Suryajaya, Tommy; Hakeem, Muhammad Hilmy; Nugraha, Tutun; Listyorini, Niken Taufiqurrahmi
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 2 (2016): SOIJST
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As freshwater resource decreasing rapidly due to high rate of human population growth, many researchers have done studies to develop methods for producing freshwater supply. Seawater desalination is one of the method that has the credibility to be implemented. However, conventional seawater desalination processes suffer from a number of problems related to energy efficiency and cost. In spite of this, nanotechnology has been applied to the process. In this paper, we give an overview and explanations concerning the roles of nanotechnology in seawater desalination processes which consist of pretreatment, reverse osmosis (RO), and disinfection. In addition, the comparisons between conventional and nanotechnology-applied processes as related to its efficiency and effectiveness are also provided.
Pengumpulan Data Base Sumber Antioksidan Alami Alternatif Berbasis Pangan Lokal di Indonesia Silvia, Deli; Katharina, Kezia; Hartono, Stefanny Agness; Anastasia, Vanessa; Susanto, Yunita
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 2 (2016): SOIJST
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Nowadays the interest in food with antioxidant content continues to increase, especially the natural antioxidant content found in the local Indonesian food. Therefore, the aim of this research is to explain some kind of natural antioxidant compounds commonly found in food, describe several methods of extraction and food processing, and gathering data about the local food products that could be an alternative natural source of antioxidants. The research method used is literature study by analyzing data based on references and journals that already exist. From this study, the result showed that antioxidant compounds in food products commonly found in the form of Vitamin C, Vitamin E, beta carotene, selenium, superoxide dismutase (SOD), and flavonoid. Some local food that can be an alternative source of antioxidants found in vegetables, fruits, spices, as well as animal products that are easily found around the community. Extraction methods commonly used to identify the antioxidant compounds are solvent extraction and mechanical extraction.
Biodiversitas Semut di Wilayah Gading Serpong, Tangerang Alfonsius, Giovani; Lestari, Lo Bunga; Wijaya, Viorenda Thery; Ivan, Fransiskus Xaverius
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 2 (2016): SOIJST
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Nowadays, ants have become a very interesting research subject due to their roles in environments, including as ‘ecosystems engineers’ and predators. Nonetheless, ant research in Indonesia is still rare, and hence it needs to be encouraged. Here we present the results of our investigation on ant biodiversity in Gading Serpong, Tangerang, which was conducted in the early of 2016.The investigation was done by collecting ants from 20 spots, and followed by the identification of ant species based on their morphological characteristics. Overall, we uncovered that there are 26 ant species from 7 subfamilies in Gading Serpong area. The most abundant species wasForelius mccooki, which has been known for their likeness to dry and hot environment. In addition, the Shannon-Wiener index of 2.72 indicates that the ant biodiversity atGading Serpong area isat moderate level, andthus the pollution level in Gading Serpong area is still of moderate impact.
Pemetaan Vegetasi Hutan Mangrove Menggunakan Metode Normalized Difference Vegetation Index (NDVI) di Desa Arakan, Minahasa Selatan, Sulawesi Utara Philiani, Intan; Saputra, Livinia; Harvianto, Loecky; Muzaki, Anggi Afif
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 2 (2016): SOIJST
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Tatapaan District in North Minahasa has  mangrove forest covering an area of 8.736.00 m2. One of the village in Tatapaan District is Arakan. This study aim for mapping mangrove density in Arakan village and determine the best result of Normalized Difference Vegetation Index (NDVI) from band combination used. NDVI method calculate the amount of vegetation greeness value derived from digital signal processing of brightness value data of multiple channels satellite sensor data from satellite images. NDVI measures the slope between the original value of the red band and infrared band in the sky with the value of each pixel in the image. Imagery used is Worldview2 satellite image recording on June 19th 2014. Based on the combination of bands used, the best result of band combination is the combination of Red and NIR 2 band with the value of the smallest error rate of deviation, ie 0.3. The density of the widest is “Rapat” class (824,566.01 m2), “Sedang” class (133,622.41 m2), “Jarang” class (12,004.92 m2), “Sangat jarang” class (10,494.23 m2), and the smallest is “Sangat rapat” class (24.45 m2). 

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