Communications in Science and Technology
Communication in Science and Technology [p-ISSN 2502-9258 | e-ISSN 2502-9266] is an international open access journal devoted to various disciplines including social science, natural science, medicine, technology and engineering. CST publishes research articles, reviews and letters in all areas of aforementioned disciplines. The journal aims to provide comprehensive source of information on recent developments in the field. The emphasis will be on publishing quality articles rapidly and making them freely available to researchers worldwide. All articles will be indexed by Google Scholar, DOAJ, PubMed, Google Metric, Ebsco and also to be indexed by Scopus and Thomson Reuters in the near future therefore providing the maximum exposure to the articles. The journal will be important reading for scientists and researchers who wish to keep up with the latest developments in the field.
Articles
234 Documents
<![CDATA[Degradation rate of vitamin B6 on red chili pepper drying by blanching-brine-calcium pretreatment ]]>
<![CDATA[Arifin, Uma Fadzilia]]>;
<![CDATA[Djaeni, Mohamad]]>
<![CDATA[ Communications in Science and Technology Vol 2 No 2 (2017) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.2.2.2017.56
<![CDATA[Drying is one of the alternatives to prevent spoilage in red chili pepper by removing moisture content. Red chili pepper (Capsicum frutescens) has complex nutrition components such as vitamins and bioactive compound. However, vitamin B6 content in chili can degrade significantly in drying process by heat. This research studied degradation rate of vitamin B6 in chili drying process under various pretreatments and temperatures. In this study, post-harvest chili before dried was pretreated by blanching, osmotic dehydration with brine, immersing in calcium chloride solution and the combination of all them. They were dried in tray dyer at various temperatures 40°C, 50°C, 60°C and 70°C. Degradation of vitamin B6 content was analyzed every 2 hours by High-Performance Liquid Chromatography for 8 hours. Results showed that blanching-brine-calcium pretreatment was expected to reduce drying time and retain high content of vitamin B6 in red chili pepper. The degradation rate of vitamin B6 in chili followed second-order reaction. The degradation rate was influenced by temperature change referring to Arrhenius equation with activation energy was about 31.97 kJ/ mol K and constant rate (k0) was 3.769. Therefore, the vitamin B6 retention can be estimated at various pretreatments, times and temperatures. Furthermore, the favorable drying conditions can be evaluated.]]>
<![CDATA[Review of methods and indicators in sustainable urban transport studies overview from 2000 to 2016 ]]>
<![CDATA[Nadi, Puji Adiatna]]>;
<![CDATA[Murad, AbdulKader]]>
<![CDATA[ Communications in Science and Technology Vol 2 No 2 (2017) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.2.2.2017.58
<![CDATA[The attention of countries either the developed or developing countries on sustainable urban transport is becoming more popular. The purpose of paper is to review the methods and the indicators used for measuring performance of sustainable urban transport. This study is based on the literature review and the case study observation and also uses the quantitative assessment. It reviews the theoretical aspects of sustainability factors at various research works and performance indicator in urban transportation. The indicators were classified into two major categories: (i) assessment methods in sustainable urban transport (SUT), and (ii) basic of sustainability indicators for urban transport. This study found several types of analytical techniques for measuring sustainability indicators in urban transport. It also identify five indicators as basic element to measure sustainable urban transport performance i.e. traffic congestion, traffic air pollution, traffic noise pollution, traffic accidents and land consumption for transport infrastructure.]]>
<![CDATA[Interference effect during word-task and colour-task in incongruent stroop-task ]]>
<![CDATA[Hotama, Christianus Frederick]]>;
<![CDATA[Nugroho, Hanung Adi]]>;
<![CDATA[Soesanti, Indah]]>;
<![CDATA[Oktoeberza, Widhia KZ]]>
<![CDATA[ Communications in Science and Technology Vol 2 No 2 (2017) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.2.2.2017.59
<![CDATA[Stroop-task is one of the most popular studies to check the ability of decision-making and cognitive process during high interference activity in the brain. In the incongruent Stroop-task, the difference between the colour that we read and the colour that we see produces high interference activities in the brain. This research aims to analyse the activity differences in each part of the brain during colour-task and word-task. This study investigates how well the ability of decision-making and cognitive process during high interference activities that occur in the brain. Electroencephalography (EEG) can record brain activities by recording the brain waves. The results show that recognising the colour is more difficult than that of the written words in the Stroop-task as indicated by statistical test with t-value greater than threshold value (t>2.0027) and significant level of 0.05. This study concludes that the colour-task gives more interference effect than the word-task. The more interference effect is produced, the more wrong decision-making is obtained. ]]>
<![CDATA[A robust automated system for detecting and recognising the digit of electrical energy consumption number of the postpaid kWh-meter ]]>
<![CDATA[Pujiharsono, Herryawan]]>;
<![CDATA[Nugroho, Hanung Adi]]>;
<![CDATA[Wahyunggoro, Oyas]]>
<![CDATA[ Communications in Science and Technology Vol 2 No 2 (2017) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.2.2.2017.61
<![CDATA[Most of the processes of kilowatt-hour meter (kWh-meter) reading in Indonesia are still in manual process which may lead to some problems, such as time consumption and high possibility of data entry errors.  Therefore, this study proposes an automated system to minimise these problems. This system is developed for the image with uneven illumination condition and tilted position of stand kWh-meter due to the unavoidable situation while capturing the kWh-meter image.  In this study, the illumination problem is solved by local thresholding and the tilted position of stand kWh-meter is solved by combination of morphology operations and vertical edge detection on the location detection process and vertical-horizontal projections on the segmentation process.  Finally, the numeral recognition is performed by support vector machine (SVM) classifier with zonal density feature as a selected input.  The results show that the accuracy of proposed system is 93.55% on detection location process, 89.38% on segmentation process, and 78.10% on numeral recognition process.]]>
<![CDATA[A mini review of haloalkane dehalogenase: From molecular characterization to applications ]]>
<![CDATA[Hasan, Khomaini]]>
<![CDATA[ Communications in Science and Technology Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.3.1.2018.70
<![CDATA[Haloalkane dehalogenases (HLDs) are hydrolytic enzymes that catalyze a removal of halogenated species in many toxic halogenated compounds. These enzymes belong to hydrolase family that mostly adopt a typically a/b hydrolase structure. They have many potential applications, such as industrial biocatalysis, pharmaceutics, biosensors, or detoxification of chemical weapons. In this review, structure, mechanism and applications of these enzymes will be discussed.]]>
<![CDATA[Detection of malaria parasites in thick blood smear: A review ]]>
<![CDATA[Azif, Faza Maula]]>;
<![CDATA[Nugroho, Hanung Adi]]>;
<![CDATA[Wibirama, Sunu]]>
<![CDATA[ Communications in Science and Technology Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.3.1.2018.75
<![CDATA[Based on data from World Health Organization, in 2015, there are 90% of deaths caused by malaria disease in Africa, Southeast Asia and countries of eastern Mediterranean. It makes the malaria become one of the most dangerous diseases that often leads to death. To support the diagnosis of malaria, early detection of plasmodium parasite is needed. Recently, malaria diagnosis process can be done with the help of computer, or often referred to as Computer Aided Diagnosis (CAD). By utilizing the digital image from the blood staining process, digital image processing can be performed to detect the presence of malaria parasite. There are 2 types of blood smear images that can be used in the malaria diagnosis process, namely, thin blood smear images and thick blood smear images. This paper provides a review of the techniques and methods used in the diagnosis of computer-assisted malaria using thick blood smear images as a diagnostic material.]]>
<![CDATA[Evaluation on the performance of single and dual frequency low cost GPS module observation using geodetic antenna ]]>
<![CDATA[Atunggal, Dedi]]>;
<![CDATA[Ma'ruf, Bilal]]>;
<![CDATA[Sunantyo, T Aris]]>;
<![CDATA[Rokhmana, Catur Aries]]>
<![CDATA[ Communications in Science and Technology Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.3.1.2018.78
<![CDATA[GPS modules have been used for various applications in recent years. Its early development came in parallel with the advancement of Unmanned Aerial Vehicle (UAV) technology. Nowadays, it is also used in in geographic information system (GIS) data acquisition/census, mapping surveys, structure stability monitoring systems and many other applications. GPS modules generally have several positioning features, including standard positioning service (SPS), static positioning, precise point positioning (PPP), post processing kinematic (PPK) and real time kinematic (RTK) GPS. GPS modules in general are only equipped with a microstrip-type antenna or better known as patch antenna. Results from related research show that GPS module with this type of antenna has sub meter accuracy when used for PPK or RTK GPS method. The use of geodetic antennas is very potential to increase GPS position accuracy by up to centimeter level. This paper discusses the evaluation of GPS module measurements with geodetic type antennas for precise positioning using RTK GPS. This paper is focused on the resolution of GPS cycle ambiguity that is often expressed by the term fixing ratio and the accuracy of measurement results obtained. To provide a comprehensive description of the performance of GPS module, in this research two types of GPS module were used; single and dual frequency. Both types of GPS modules were used to conduct simultaneous observation on an open and obstructed observation location.]]>
<![CDATA[Impact of mobile subscribers dual stack IPv4/IPv6 deployment ]]>
<![CDATA[Pahlevi, Mohammad Dian]]>;
<![CDATA[Soewito, Benfano]]>
<![CDATA[ Communications in Science and Technology Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.3.1.2018.79
<![CDATA[The use of CGNAT at PT. ZYX as a mobile telecommunication service provider cannot be relied as the solution to solve addressing needs against subscriber growth in future technology. Meanwhile, native IPv6 deployment is currently application-driven, which requires maturity support in either subscriber user equipment, network, and application itself. IPv4/IPv6 dual stack deployment was selected by PT. ZYX as stepping stone towards native IPv6 deployment. This paper analyzes the impact of dual stack IPv4/IPv6 deployment for mobile subscribers at PT. ZYX. After selecting the dual stack approach and completing the deployment, test and measurements were performed to confirm the connectivity also against the performance and node utilization to conclude the impact. The test confirmed successful connectivity and the measurements showed that the deployment gives significant enhancement of routing table size and NAT table in node utilization and does not cause performance drop of hop count, throughput, and download time.]]>
<![CDATA[Inventory simulation model of frozen-meat for food-safety program ]]>
<![CDATA[Darajat, Moch Yandra]]>;
<![CDATA[Komarudin, Komarudin]]>;
<![CDATA[Hidayatno, Akhmad]]>
<![CDATA[ Communications in Science and Technology Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.3.1.2018.81
<![CDATA[This research discusses the application of inventory simulation and optimization model for food safety program in Indonesia. Frozen meat is a complementary commodity for fresh meat that has an inadequate supply in the country. The disadvantage of frozen meat is that it needs to be stored in a refrigerator to maintain its quality and thus increases the cost. Therefore, an appropriate inventory policy is crucial to minimize the cost. In order to deal with this situation, a Monte Carlo simulation followed by an optimization model is proposed. Specifically, the Moving Average and the Winter Methods are used to predict the demand in the future. The results show the best inventory policy thus the cost is minimized and the national needs are satisfied.]]>
<![CDATA[Enhancing thermal and mechanical properties of polypropylene using masterbatches of nanoclay and nano-CaCO3: A review ]]>
<![CDATA[Chafidz, Achmad]]>
<![CDATA[ Communications in Science and Technology Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Komunitas Ilmuwan dan Profesional Muslim Indonesia ]]>
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DOI: 10.21924/cst.3.1.2018.83
<![CDATA[Polymer nanocomposites (PNCs) can be considered as promising relatively new types of composite materials. PNCs give opportunity to develop new composites materials with different structure-property relationships compared to their conventional micro/macro scale composites. Polyolefin based nanocomposites nowadays become more important, because this type of composites has been largely used in various industries. For example, polypropylene based nanocomposites have been widely used in automobile – related industries to replace their conventional composites. This review paper will focus on the polypropylene based nanocomposites prepared using masterbatches of nanoclay and nano-CaCO3 via melt compounding method. The thermal and mechanical properties of such nanocomposites were also discussed.]]>
