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Determination of Mung Bean Seed Viability Change in Vacuum Packaging during Storage in Different Temperatures

IOP Conference Series: Materials Science and engineering 2019年第1期557卷

作者： M. Faisal U. Ahmad D. Wulandani Postharvest Technology Master Course Program Graduate School Bogor Agricultural University Indonesia Dept. of Mechanical and Bio-system Engineering IPB Bogor Agricultural University Indonesia

Mung bean seeds decreased their viability very fast during storage, especially in tropical area without proper packaging. The purpose of this study is to observethe decrease in viability of mung bean seeds during storage and to build a mathematical model for shelf life prediction. Dried mung bean seeds were vacuum packed and stored in Accelerated Shelf-life Testing chamber at five different temperatures of 30° C, 35° C, 40° C, 45° C, 50° C with approximately 80% in relative humidity, to facilitate rapid deterioration with different rate of physical and chemical change in the seed. The results show that there was an increase in moisture content and the germination decreased in different rates. Changes in values for some parametersof the seeds affected the viabilty of the seeds during rapid deterioration. The value of constant (k)for viability decreasing was calculated and used to build the mathematical model for predicting the shelf life of mung bean seeds during storage at any temperature. Using the developed model, it was observed that the shelf life of the Sriti variety of mung bean seeds in vacuum packaging could maintain 90% of germination level for 421 days or 14.3 months if stored at 20 °C, and for 173.37 days or 5.78 months if stored at 25 °C.

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Potential of natural sunlight for microalgae cultivation in Yogyakarta

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IOP Conference Series: Earth and Environmental Science 2022年第1期963卷

作者： E Habibah E A Suyono M D Koerniawan L T Suwanti U J Siregar A Budiman Master Program in System Engineering Gadjah Mada University Jalan Teknika Utara 3 Kampus UGM Yogyakarta 55281 Indonesia Faculty of Biology Gadjah Mada University Jalan Teknika Selatan Kampus UGM Yogyakarta 55281 Indonesia Center of Excellence for Microalgae Biorefinery Gadjah Mada University Sekip K1A Yogyakarta 55281 Indonesia Department of Architecture School of Architecture Planning and Policy Development Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung 40132 West Java Indonesia Department of Veterinary Parasitology Faculty of Veterinary Medicine Universitas Airlangga. Jl. Mulyorejo Kampus C Unair Surabaya 60115 East Java Indonesia Department of Silviculture Faculty of Forestry Institut Pertanian Bogor. Jl. Lingkar Akademik Dramaga Bogor 16680 West Java Indonesia

The study of microalgae is widely developed on a laboratory scale. The large-scale applications of microalgae such as large photo-bioreactors or commercial ponds are not well established due to some obstacles. The high cost of artificial lighting in microalgae cultivation is one of the obstacles. Markedly, the natural sunlight intensity is high every month for a whole year in Indonesia. This natural sunlight may serve as a low-cost lighting source for microalgae cultivation in a tropical country such as Indonesia. However, the basic knowledge of whether the natural sunlight in Indonesia is sufficient or not for microalgae cultivation is poorly understood. This study was performed to investigate whether sunlight in Indonesia, particularly in Yogyakarta, is sufficient or not for microalgae cultivation in the absence of artificial lighting. The sun lighting period data from January 2019 to June 2020 were collected from BMKG (Badan Meteorologi Klimatologi dan Geofisika) website. The sun lighting period data were converted into solar radiation data. The Liliefors test was performed to evaluate the distribution of the solar radiation data. To confirm whether the sun lighting in Yogyakarta is sufficient for microalgae cultivation or not, the parametric statistical test namely single sample T-test was used in this study. The Liliefors test showed that solar radiation in Yogyakarta (January 2019 to June 2020) was normally distributed. The calculated Liliefors value (0.14) was less than Liliefors table value (2.00). The T-test results revealed that the solar radiation in Yogyakarta is equal to or higher than the sufficient solar radiation (reference) for microalgae cultivation (795 kWh/m2). The calculated t value (0.65) was higher than the t table value (-1.74). When taken together, our findings suggest that natural sunlight in Yogyakarta is sufficient as a lighting source for microalgae cultivation.

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Wavelet-based Technique for Mobile Device with Low Resolution Depth Image-based Rendering

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Journal of Computers (Taiwan) 2018年第6期29卷 168-180页

作者： Lu, Shengrong Hsia, Chih-Hsien Cheng, Wei-Han Li, Hsin-Ting Chiang, Jen-Shiun Zhang, Ling Tseng, Hsien-Wei Gong, Cihun-Siyong Alex School of Information Engineering Longyan University Longyan city Fujian364012 China Department of Computer Science and Information Engineering National Ilan University Yilan Taiwan Department of Electrical and Computer Engineering Tamkang University New Taiepi Taiwan Department of Electrical Engineering Chang Gung University Taoyuan Taiwan Portable Energy System Group of Green Technology Research Center Chang Gung University Taoyuan Taiwan Department of Ophthalmology Chang Gung Memorial Hospital Taoyuan Taiwan Master Program of Arts and Technology Chinese Culture University Taiwan

Depth Image-Based Rendering (DIBR) is an approach to generate a 3-D image by the original 2-D color image with the corresponding 2-D depth map. Although DIBR is a quite convenient to convert 2D images to 3D ones, there is a disadvantage in DIBR system that it cannot reach real-time processing due to the computing time. Against this, this paper proposes a method which is based on discrete wavelet transform and adaptive edge-oriented smoothing process, to speed up the computing of the system. The proposed method still preserves the original texture and thus the proposed method not only preserves the vertical texture but also reduces at least 60% of the computing time of the DIBR system. © 2018 Computer Society of the Republic of China. All rights reserved.

关键词： Discrete wavelet transforms

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Aggregation of two-dimensional composite grains due to self-gravitation

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AIP Conference Proceedings 2020年第1期2219卷

作者： S. Viridi F. F. Florena F. Faizal A. Suroso Nurhasan Y. Bindar 1Nuclear Physics and Biophysics Institut Teknologi Bandung Bandung 40132 Indonesia 2Master Program in Physics Institut Teknologi Bandung Bandung 40132 Indonesia 3Nanotechnology and Graphene Research Center Universitas Padjadjaran Sumedang 45363 Indonesia 4Theoretical High Energy Physics Institut Teknologi Bandung Bandung 40132 Indonesia 5Physics of Earth and Complex Systems Institut Teknologi Bandung Bandung 40132 Indonesia 6Energy and Processing System of Chemical Engineering Institut Teknologi Bandung Bandung 40132 Indonesia

Binding force in the form of spring force binds two adjacent spherical grains and based on this interaction various structures of composite particles can be constructed. In this work only composite particles up to N = 4 are discussed, where N is number of spherical grains in a composite particle, and the forms are limited to the two-dimensional cases only. There is only one structure of composite particle for each value of N for 1 < N ≤ 2. For N = 3 there are five structures and for N = 4 there are fifteen structures. Between spherical grains from different composite particles only two types of force are considered. The first is a long-range attractive force in the form of gravitation force and the last is a short-range repulsion force in the form of normal force. The first type of force will help the aggregation process, while the second will prevent two spherical grains to collapse into a single grain due to the first. It is observed that the time required to produce the compact aggregate or T is dependent on N, where larger N makes larger T.

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Identification of rice supply chain risk to DKI Jakarta through Cipinang primary rice market

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IOP Conference Series: Earth and Environmental Science 2018年第1期106卷

作者： D Sugiarto A Ariwibowo I Mardianto D Surjasa Information System Program Faculty of Industrial Technology Universitas Trisakti Jakarta Indonesia Informatics Program Faculty of Industrial Technology Universitas Trisakti Jakarta Indonesia Industrial Engineering Master Program Faculty of Industrial Technology Universitas Trisakti Jakarta Indonesia

This paper identifies several sources of risks in DKI Jakarta rice supply chain that through Cipinang Primary Rice Market (CPRM). Secondary data from several sources were collected and analysed using pareto chart and time series analysis. Based on the pareto analysis, it was known that there was a change in the order of suppliers whereas in 2011, 80% of the supply came only from Cirebon, Karawang and Bandung (West Java Province). While in 2015 the main source of supply changed to Cirebon, Central Java and Karawang. Linear trend equation using decomposition model for Cirebon and Karawang showed trend of decreasing monthly supply while Central Java had a positive trend. Harvest area of wetland paddy in Cirebon and Karawang showed a negative trend in the last 6 years. The data also showed that West Java Province was the province with the largest rice crop area affected by plant organism attack and drought disaster in 2015. DKI Jakarta had several potential supply chain risks from rice supply, drought risk and pests risk where the province of West Java, which previously could become a major supplier began to require supply assistance from other provinces, especially Central Java.

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The design of microalgae (Chlorella sp.) photobioreactor as a façade bus shelter building in Indonesia

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AIP Conference Proceedings 2020年第1期2296卷

作者： Arbye S. Retno Fitri Arianti Yano Surya Pradana Eko Agus Suyono Mochamad Donny Koerniawan Lucia Tri Suwanti Ulfah Juniarti Siregar Arief Budiman 1Master Program of System Engineering Universitas Gadjah Mada Jl. Teknika Utara Yogyakarta 55281 Indonesia 2Chemical Engineering Department Universitas Gadjah Mada Jl. Grafika 2 Yogyakarta 55281 Indonesia 3Faculty of Biology Universitas Gadjah Mada Jl. Teknika Selatan Yogyakarta 55281 Indonesia 4Department of Architecture School of Architecture Planning and Policy Development Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung 40132 West Java Indonesia 5Department of Veterinary Parasitology Faculty of Veterinary Medicine Universitas Airlangga. Jl. Mulyorejo Kampus C Unair Surabaya 60115 East Java Indonesia 6Department of Silviculture Faculty of Forestry Institut Pertanian Bogor. Jl. Lingkar Akademik Dramaga Bogor 16680 West Java Indonesia

The purpose of microalgae cultivation generally divided into several categories, such as a resource of renewable energy, superfood, feed, pharmaceutical, CO2 sequestration, and O2 production. Recent research about microalgae cultivation on photobioreactors has the potential to be integrated into the building as a façade. The first building integrated with microalgae façade photobioreactor already applied in BIQ House Germany. However, research on the microalgae façade photobioreactors in Indonesia is still limited. This research design and apply a microalgae photobioreactor façade with an online monitoring system for the temperature and light intensity parameters on the bus shelter building in Indonesia on a prototype scale. The dimension of the prototype is 80 cm x 25 cm x 40 cm, with a total cultivation capacity is 10 litres. The material of the microalgae façade photobioreactor is a 3 mm glass and mounted on aluminium and wood frame. The results of this study showed the microalgae façade photobioreactor had an excellent performance from the growth rate of microalgae cells (Chlorella sp.) viewpoint and its function in decreasing the room temperature at the bus shelter.

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Hydro-char production from press-mud wastes of the sugarcane industry by hydrothermal treatment with natural zeolite addition

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AIP Conference Proceedings 2018年第1期2026卷

作者： Asroful Abidin Chandra Wahyu Purnomo Rochim Bakti Cahyono 1Master Program of System Engineering Universitas Gadjah Mada Yogyakarta Indonesia 2Chemical Engineering Department Universitas Gadjah Mada Yogyakarta Indonesia 3Agrotechnology Innovation Center PIAT-UGM Sleman Yogyakarta Indonesia

Hydrothermal treatment (HT) is a biomass conversion by thermal process that using water as solvent and reactant. This technology is superior in treating biomass with a high water content into char and liquid product. This research aims to observe the zeolite incorporation in HT as an additive material to increase the acidity for hydrolysis enhancement. The effects of temperature and zeolite addition on biochar of press-mud biomass characteristic has been observed. The temperature variation were 180, 200, and 220°C with a water-biomass ratio of 1:5 and residence time of sixty minutes. Zeolite was added as much as 20% of the sample weight. The HT char was characterized using proximate analysis, heating value, and FTIR. The solid product had a heating value from 1886.419 to 2047.559 cal/g. It is observed that temperature variation affect the caloric value, ash content, fix carbon, and energy densification, while zeolite addition increased solid yield, energy yield, and liquid product acidity.

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Growth kinetic of Chlorella sp. microalgae at flate plate photobioreactor

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AIP Conference Proceedings 2020年第1期2296卷

作者： Retno Fitri Arianti Arbye S. Yano Surya Pradana Eko Agus Suyono Mochamad Donny Koerniawan Lucia Tri Suwanti Ulfah Juniarti Siregar Arief Budiman 1Master Program of System Engineering Universitas Gad}ah Mada Jl. Teknika Utara Yogyakarta 55281 Indonesia 2Chemical Engineering Department Universitas Gad}ah Mada Jl. Grafika 2 Yogyakarta 55281 Indonesia 3Faculty of Biology Universitas Gad}ah Mada Jl. Teknika Selatan Yogyakarta 55281 Indonesia 4Department of Architecture School of Architecture Planning and Policy Development Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung 40132 West Java Indonesia 5Department of Veterinary Parasitology Faculty of Veterinary Medicine Universitas Airlangga. Jl. Mulyore}o Kampus C Unair Surabaya 60115 East Java Indonesia 6Department of Silviculture Faculty of Forestry Institut Pertanian Bogor. Jl. Lingkar Akademik Dramaga Bogor 16680 West Java Indonesia

Chlorella sp. microalgae are often cultivated for various purposes such as medicines, cosmetics, and alternative energy such as biodiesel, bio-crude oil. Different concentrations of nutrients in culture medium can give different effect on population growth and essential content of Chlorella sp. One of them is the concentration of nitrate and phosphate. In order to increase the biomass produced, it is necessary to enhance its growth with another medium that that are cheaper and easier. Urea and TSP was used as source of nitrogen and phosphate element in various ratio for the cultivation at flat plate photobioreactor. Among the process conditions tried, cultivation using urea and TSP fertilizer medium in ratio 2:1 (C1) was considered as the optimum composition that resulted in highest cell density, 4.28 × 107 cells/mL. Then, medium in ratio 4:1 (C2) which was 3.10 × 107 cells/mL and the lowest cell density found in ratio medium 6:1 (C3) which was 1.65 × 107 cells/mL. Medium with low nitrogen content had the highest cell density. The temperature culture during cultivation was in the range of 25 - 26 oC and pH value was in the range of 8.3 - 87. Temperature and pH culture during cultivation are still in optimal conditions for the growth of Chlorella sp.

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Analysis of user readiness toward ICT usage at small medium enterprise in south tangerang

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Journal of Physics: Conference Series 2018年第1期1007卷 012042-012042页

作者： Napitupulu, D Syafrullah, M Rahim, R Abdullah, D Setiawan, MI Research Center for Quality System & Testing Technology Indonesian Institute of Sciences Tangerang Selatan Banten Indonesia Program of Master of Computer Science Universitas Budi Luhur Indonesia School of Computer and Communication Engineering Universiti Malaysia Perlis Malaysia Department of Informatics Universitas Malikussaleh Aceh Indonesia Department of Civil Engineering Narotama University Surabaya Indonesia

Utilization of Information and Communication Technology (ICT) is still relatively low in the level of SMEs due to various limitations ranging from access to capital, till the marketing network. ICT is present to provide the ability for SMEs in improving the benefits and competitive advantage of the organization. This study aims to determine the level of readiness of SMEs in utilizing technology, especially ICT. The methodology used is a survey to see the technology readiness of 107 SMEs in South Tangerang selected by purposive sampling. The approach used is TRI (Technology Readiness Index) which is the individual perception of technology based on four criteria that is optimism, innovativeness, discomfort and insecurity. The results showed that the optimism and innovativeness variables significantly positively influence the technology readiness while the variables of discomfort and insecurity also significantly positively influence the readiness of ICT.

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Analysis of e-learning implementation readiness based on integrated elr model

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Journal of Physics: Conference Series 2018年第1期1007卷

作者： K Adiyarta D Napitupulu R Rahim D. Abdullah MI Setiawan Program of Master of Computer Scocience Universitas Budi Luhur Indonesia Research Center for Quality System & Testing Technology Indonesian Institute of Sciences Tangerang Selatan Banten Indonesia School of Computer and Communication Engineering Universiti Malaysia Perlis Malaysia Department of Informatics Universitas Malikussaleh Aceh Indonesia Department of Civil Engineering Narotama University Surabaya Indonesia

E-learning nowadays has become a requirement for institutions to support their learning activities. To adopt e-learning, an institution requires a large strategy and resources for optimal application. Unfortunately, not all institutions that have used e-learning got the desired results or expectations. This study aims to identify the extent of the level of readiness of e-learning implementation in institution X. The degree of institutional readiness will determine the success of future e-learning utilization. In addition, institutional readiness measurement are needed to evaluate the effectiveness of strategies in e-learning development. The research method used is survey with questionnaire designed based on integration of 8 best practice ELR (e-learning readiness) model. The results showed that from 13 factors of integrated ELR model being measured, there are 3 readiness factors included in the category of not ready and needs a lot of work. They are human resource (2.57), technology skill (2.38) and content factors (2.41). In general, e-learning implementation in institutions is in the category of not ready but needs some of work (3.27). Therefore, the institution should consider which factors or areas of ELR factors are considered still not ready and needs improvement in the future.

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