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Achievement of green campus indications based on assessment indicators on H-BAT program Universitas Negeri Semarang

IOP Conference Series: Earth and Environmental Science 2021年第1期700卷

作者： T Prihanto K Fathoni B Prasetiyo Study Program of Architecture Faculty of Engineering Universitas Negeri Semarang Study Program of Electrical Engineering Faculty of Engineering Universitas Negeri Semarang Study Program of Informatics Universitas Negeri Semarang

Universitas Negeri Semarang (UNNES) has a spirit to become a Conservation and International Reputation University is realized through strategic missions. One of the conservation-oriented implementation programs is H-BAT (Green, Clean and Healthy) program. In its implementation, there is a problem, namely the achievement of H-BAT program has not been maximized during the last 3 years in assessment. The objectives of this research are: (1) to identify of the potential and character of environmental support in the work units; (2) to determine the achievement of the indication of a green campus based on the assessment indicators on H-BAT program. This research was carried out in four stages: (1) Data collection; (2) Spatial data processing; (3) Non Spatial data processing; (4) Analysis (ecological, technical standards); The results achieved in June 2020 are as follows: FT got 87,50%, FE got 85,87%, FMIPA got 81,52%, BUHK got79,49%, FIP got 73,91%, LP3 got 69,23%, LP2M got 63,46%, FIS got 60,33%,PPS got 57,07%, FIK got 56,52%, FH got 52,72%, FBS got 49,46%, TIK got 40,38%, BPB got 34,62%, Library got 30,13%, Archive got 17,31%. From these results, it can be seen that there is a lack of maximum achievement due to, among others, the lack of guidance and technical assistance in the management of the unit. So it is necessary to complete governance guidelines and technical assistance that are more intensive in unit governance to achieve the goals of UNNES as a green campus.

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study of radon removal performance of silver-ion exchanged zeolite from air for underground experiments

arXiv

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arXiv 2024年

作者： Sone, T. Takeuchi, Y. Matsukura, M. Nakano, Y. Ogawa, H. Sekiya, H. Wakihara, T. Hirano, S. Taniguchi, A. Department of Physics Graduate School of Science Kobe University Hyogo Kobe657-8501 Japan The University of Tokyo Institutes for Advanced Study University of Tokyo Chiba Kashiwa277-8583 Japan Institute of Engineering Innovation School of Engineering The University of Tokyo Bunkyo Tokyo113-8656 Japan Faculty of Science University of Toyama Toyama930-8555 Japan CST Nihon University Chiyoda Tokyo180-0011 Japan Kamioka Observatory Institute for Cosmic Ray Research the University of Tokyo Gifu506-1205 Japan Department of Chemical System Engineering The University of Tokyo Bunkyo Tokyo113-8656 Japan Tosoh Corporation Chuo Tokyo104-8467 Japan Sinanen Zeomic Co. Ltd. Aichi Nagoya455-0051 Japan

Radon is a common background source for underground astroparticle physics experiments and its removal is essential. In this study, we fabricated several prototype silver-ion exchanged zeolites, measured their radon adsorption properties, and evaluated their applicability for radon removal in underground experiments. As a result, we succeeded in producing a prototype silver-ion exchanged zeolite that showed better radon adsorption properties than preceding studies. Copyright © 2024, The Authors. All rights reserved.

关键词： Metal ions

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Grapenet_Lv1 for the Prediction of Optimum Hand-Picking Time of Nagano Purple Grapes

SSRN

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SSRN 2025年

作者： Islam, Md. Parvez Shinagawa, K. Hatou, K. Abdurrakhman, Arief Dian, K. Department of Biomechanical Systems Faculty of Agriculture Ehime University 3-5-7 Tarumi Matsuyama790-8566 Japan United Graduate School of Agriculture Ehime University 3-5-7 Tarumi Matsuyama790-8566 Japan Department of Instrumentation Engineering Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia Business Mathematics Program Study School of Applied STEM Universitas Prasetiya Mulya BSD Campus BSD City Kav. Edutown I.1 Tangerang15339 Indonesia Indonesia

We investigated the optimum hand-picking time of Nagano Purple, a rare Japanese table grape variety. The color sensitivity between pure red–purple–black and pure purple–black makes it difficult for farmers to harvest these fruits at the right time while maintaining high sweetness level. We manually extracted 13 color parameters, namely, X, Y, Z, x, y, L*, a*, b*, L, a, b, C*, and h, from 355 grape skin samples using a colorimeter, which is a time-consuming and expensive process. In addition, we developed a 15-layer shallow long short-term memory (LSTM) and bidirectional long short-term memory (BLSTM) neural network, namely, GrapeNet_Lv1, with a learnable parameter of 1.39E+06. This network is compact and requires low computational cost for training. Furthermore, it has the ability to prevent the problems of vanishing gradient and overfitting. The combination of all the 13 aforementioned parameters yielded promising results in predicting color and sweetness levels, with test accuracies of 0.83 and 0.76, respectively. In the prediction of color level, our proposed network GrapeNet_Lv1 achieves a high validation accuracy of 0.92, F1 score of 0.88, recall of 0.87, low validation loss of 0.39, and RMSE of 0.31. However, in the prediction of sweetness level, GrapeNet_Lv1 achieves a relatively low validation accuracy of 0.79, F1 score of 0.70, recall of 0.69, high validation loss of 0.72, and RMSE of 0.33. Further research can help improve the accuracy. GrapeNet_Lv1 can be applied to other crops, where, predicting the whose optimal hand-picking time is difficult to predict based on color recognition. Keywords: Neural network;LSTM-BLSTM;Nagano Purple, color, sweetness © 2025, The Authors. All rights reserved.

关键词： Long short-term memory

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Improving vocational education quality through life-based learning

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AIP Conference Proceedings 2023年第1期2531卷

作者： Yoto P. A. N. Mawangi A. N. Pramudhita Mechanical Engineering Education Study Program Mechanical Engineering Department Faculty of Engineering State University of Malang Jl. Semarang No. 5 Malang Indonesia Informatics Engineering Department State Polytechnic of Malang Jl. Sukarno-Hatta No 9 Malang Indonesia

Vocational graduates supposedly have the competencies following the purpose of vocational education: preparing medium-skilled labor in a particular area that corresponded with the industrial needs. The 21st-century learning, among others, was signified with a learning process that optimizing the brain function. In the 21st-century, businesses and industries tend to demand skilled labors in digital literacy, technology literacy, and human literacy. Thus, vocational education should be able to innovate and create to respond to the challenge and opportunity from the 21st-century implication through revitalizing the vocational education, involving learning system, education units, learners, educators, and educational staffs. A suitable learning system for the 21st-century is a life-based learning model. Life-based learning in vocational education could be performed through industrial practice, industrial class, and teaching factory activities. These three approaches aimed to bring the learning activities closer with real-life work at the workplace through field practices. With life-based learning at the real workplace, students would develop a discipline, responsible, teamwork, and work culture habits as provisions after finishing the vocational education.

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Synergetic Effect of Nonthermal Plasma and Supported Cobalt Catalyst in Plasma-Enhanced Co2 Hydrogenation

SSRN

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SSRN 2022年

作者： Song, Chunshan Wang, Jiajie Wang, Xiaoxing AlQahtani, Mohammad S. Knecht, Sean D. Bilén, Sven G. Chu, Wei Department of Chemical Engineering Sichuan University Chengdu610065 China Clean Fuels & Catalysis Program EMS Energy Institute Department of Energy and Mineral Engineering The Pennsylvania State University University ParkPA16802 United States Department of Chemical Engineering The Pennsylvania State University University ParkPA16802 United States School of Engineering Design Technology and Professional Programs The Pennsylvania State University University ParkPA16802 United States School of Electrical Engineering and Computer Science The Pennsylvania State University University ParkPA16802 United States Department of Chemistry Faculty of Science The Chinese University of Hong Kong NT Hong Kong Shatin China

Nonthermal plasma can provide an alternative to CO 2 utilization under mild conditions. Understanding the effect of plasma on catalysis is highly desired. Herein, a comparative study was performed on CO 2 hydrogenation under thermal catalytic and plasma catalytic conditions using an alumina-supported cobalt catalyst. Significant plasma-catalyst synergy was attained at the low-temperature range between 423 K and 498 K where the CO 2 conversion increased up to approximately 3.6 times of the sum of that using plasma or catalyst individually. The plasma-catalytic reaction showed a significantly lower activation energy (~40 kJ/mol), which is only half of that in the thermal catalytic reaction (~80 kJ/mol). Kinetic analysis and DRIFTS results indicate that CO 2 activation is promoted by plasma with the assistance of active H species from gas phase. Furthermore, the total H 2 adsorption capacity and the coverage of unrecyclable adsorbed H species on the metal surface were decreased under plasma. The promotion effect is very likely due to a new reaction pathway introduced by plasma. In addition, the structure and morphology changes of spent catalysts after thermal or plasma reaction were not significant, suggesting they contribute little to the synergetic effect observed under the conditions. © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

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The use of phase-change material on a thermosyphon solar water heater: Continuous and gradual discharging characteristics

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AIP Conference Proceedings 2022年第1期2499卷

作者： Muhammad Nadjib Suhanan Joko Waluyo Indro Pranoto 1Mechanical Engineering Study Program Faculty of Engineering Universitas Muhammadiyah Yogyakarta Yogyakarta Indonesia 2Department of Mechanical and Industrial Engineering Faculty of Engineering Gadjah Mada University Yogyakarta Indonesia

Water use as a heat storage material in solar water heaters (SWH) has disadvantages, including its low energy density, which requires a large volume of thermal energy storage. Phase-change material (PCM) is a latent type of heat storage material that has the advantage of being a high energy density. Therefore, PCM is quite interesting to be applied to SWH systems. In the operation of SWH, it is necessary to know the characteristics of hot water usage. This paper aimed to determine the characteristics of a continuous and gradual discharging method on SWH that applies PCM. This study used a thermosyphon type of SWH. The tank was placed horizontally on the top side of the collector with a volume of 60 liters. Twenty-four cylindrical capsules containing paraffin wax were inserted into the tank. Thermocouples were installed on the waterside and the PCM side. Continuous and gradual methods were carried out in the discharging experiment. Experiments using a continuous discharging method given information that water temperature decrease continuously in the tank. Experiments with a gradual discharging method showed PCM’s contribution, which can transfer thermal energy to the water. The gradual discharging method explained that the SWH system produced hot water that can be used for bathing as many as five people every day with water temperatures of 45 °C at an average solar radiation intensity of 514.89 W/m2. The use of PCM makes a positive contribution to the thermal energy storage in the tank.

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Design of concentrated solar thermal powered heat exchanger completed with energy storage material

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AIP Conference Proceedings 2023年第1期2719卷

作者： Shafira Riskina Adi Setiawan Gunawati Gunawati Rozanna Dewi Magister Program in Renewable Engineering Faculty of Engineering Universitas Malikussaleh Bukit Indah 24352 Lhokseumawe Indonesia Mechanical Engineering Department Faculty of Engineering Universitas Malikussaleh Bukit Indah 24352 Lhokseumawe Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Universitas Syiah Kuala Darussalam 23111 Banda Aceh Indonesia Chemical Engineering Department Faculty of Engineering Universitas Malikussaleh Bukit Indah 24352 Lhokseumawe Indonesia

Indonesia is a tropical area and located under the equator line with more than six hours of sunlight a day or about 2400 hours a year. Solar energy has an intensity between 0.6-0.7 kW/m2 and has a potential of 207.8 GWe (electric). This potential can be utilized to reduce the use of fossil energy by harvesting solar energy and transferring it in a helical coil heat exchanger (HCHE) type. This study aims to develop a special proposed heat exchanger design to collect solar thermal energy. As the energy supply is intermittent, a thermal energy storage system is installed. The design of HCHE has coil diameter of 10 mm with thickness of the tube 0.5 mm. HCHE performance test was performed by feeding water to the heat exchanger at a flow rate of 0.006 kg/s where the inlet water temperatures was 27.2˚C. At the outlet, the average temperature was 32.3˚C. During the test, the maximum temperature can be reached by the system was 269.4˚C. This indicates that the solar thermal collector design is working and potentially can be scale-up for energy generating system.

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Effect of Modification Processes on Cassava Starch: Physichochemical Properties and Expansion Ability of Coated Penute 3

Effect of Modification Processes on Cassava Starch: Physicho...

引用

3rd International Conference on chemical and Material engineering, ICCME 2018

作者： Sumardiono, S. Putri, A.W.Z. Jos, B. Pudjihastuti, I. Department of Chemical Engineering Faculty of Engineering Diponegoro University Jl Prof. H. Soedarto SH Tembalang Semarang50275 Indonesia Master Program in Chemical Engineering Faculty of Engineering Diponegoro University Indonesia

One of popular peanut-based food product in Indonesia is coated peanuts. Coated nuts are peanuts wrapped in a flour batter and then fried until it dry. Coated peanut quality is influenced by the nature and characteristics of the flour used. Tapioca starch used as a coating on coated peanut products are expected to have a crispness and a good baking expansion. Natural starch has some lack, which it requires a long cooking time and pasta is formed loud and unclear. To improve the performance of the starch used, native starch is modified by physical, chemical or enzymatic process into diversified products with better functionality. In this work, modified starch is obtained by three different modification process, namely process of fermentation using Lactic Acid Bacteria, process of hydrolysis using lactic acid and process of esterification using lactid acid and ethanol. The analysis include the analysis of swelling power, solubility, determination of amylose content, crispness and level of dough development. Modified starch is expected to have optimal crispness and optimal baking expansion. From the result shown modification by hydrolysis give better characteristic of modified starch than the result of esterification and fermentation. Adding UV rays during modification give significant impact for starch. After modification is complete, drying under sunlight or drying with oven has their own strenght and weakness. The optimum variable from this research is wet tapioca starch which modified by esterification with adding UV rays and drying using direct sunlight which have swelling power 21,74 g/g, solubility 18,30%, expansion ability 1457,7%, and crispy starch value 345,8 gf. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Fermentation

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Production of Fish Feed from Soy Residue and Shrimp Waste using Tapioca as Binding Agent 3

Production of Fish Feed from Soy Residue and Shrimp Waste us...

引用

3rd International Conference on chemical and Material engineering, ICCME 2018

作者： Sumardiono, S. Siqhny, Z.D. Department of Chemical Engineering Faculty of Engineering Diponegoro University Jl Prof. H. Soedarto SH Tembalang Semarang50275 Indonesia Master Program in Chemical Engineering Faculty of Engineering Diponegoro University Indonesia

The most used fish feed in cultivation activities is commercial feed that spends most of total cultivation cost. One of the effort to solve this problem is providing homemade fish food. The pellet based on local waste raw materials can reduce dependency of commercial fish feed. One of the local wastes that can be used is soy residue and shrimp waste. Tapioca is used as a binding agent for fish pellet. The aim of the research was to study the effect of raw material composition and binding agent concentration on proximate value, performance and mechanical strength. The research was conducted in several steps such as raw materials pretreatment, the experiment of raw materials and binding agent formulation, mixing, extrusion, prilling process, drying process, and product analysis (proximate and performance analysis). There are five formulations of raw materials and three different of formulation on binding agents. The drying process was done in 50°C and the product was then analyzed. The result shows that formulation with 30% soy residue, 60% shrimp waste and 10% binding agent resulted in a product with good proximate value (11.23% moisture content, 17.64% ash, 1.33% fat, 25.10% fiber, 29.54% protein). Increasing the percentage of binding agents resulted in higher mechanical strength and higher performance. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Pelletizing

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Phytoremediation of phosphate using Typha sp. and Echinodorus palaefolius

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Journal of Physics: Conference Series 2021年第1期1832卷

作者： F L Fitria Y Dhokhikah Study Program of Environmental Engineering Faculty of Engineering University of Jember

Jember Regency is an agricultural area. Giving fertilizer is one of the agricultural activities. It usually contains a phosphate. If fertilizer is used too much, it will cause environmental pollution. The level of phosphate pollutants increase that can cause eutrophication. Phytoremediation is a plants utilization technology to reduce pollutants. This study aims to determine the effect of Typha sp. and Echinodorus palaefolius to reduce phosphate levels from fertilizer residues. The research reactor was a batch. The reactor used bed evapotranspiration system. Phytoremediation test analysis was carried out every two days for 8 days. Typha sp. and E. palaefolius on the day 8th observation levels phosphate were down by 90,33% and 92,86%. The most efficient in this experiment was E. palaefolius.

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