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Analysis of Daylight Distribution on Building Height and Space Depth.

IOP Conference Series: Materials Science and engineering 2019年第1期619卷

作者： Nurul Jamala Annajma Nurul Wika Asniawaty Kusno Department of Architecture Engineering Faculty Hasanuddin University Indonesia Study Program of Architecture Engineering Faculty Hasanuddin University Indonesia

Lighting design is one of the priorities in designing buildings. Natural lighting can reduce energy consumption in buildings. Aesthetic levels are the basis of the planning concept, but need to pay attention to the concept of using natural lighting, in order to realize the energy-efficient building design. The purpose of the study was to determine how the level of illuminance affects the opening area, depth of space and height of the building. Quantitative research method is to analysis statistical data from measurements of illuminance levels in space. The results of the study concluded that the level of illuminance in the meeting room of the Center of Technology building in Hasanuddin University exceeded the illuminance standard. The extent of openings in the building envelope affects the illuminance level in space. Natural light distribution affects the height of the building's floor and the depth of space. Based on this conclusion, it is expected that in designing a building it is necessary to pay attention to the building facade, so that the distribution of natural light is not too high into the building and to avoid negative effects such as glare, high brightness and contrast.

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Design and development of photonic-based non-invasive hemoglobin level detector

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AIP Conference Proceedings 2020年第1期2314卷

作者： Suryani Dyah Astuti Ikhsan Rino Wijaya Osmalina Nur Rahma Alfian Pramudita Putra Muhammad Fahmi Akif Rahmatillah Riries Rulaningtyas 1Biomedical Engineering Master Degree Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia 2Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia 3Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

Hemoglobin is the protein molecule that binds oxygen in the blood. Hemoglobin level can be used as a benchmark of the human physiological condition, such as anemia, hypoxia, and postoperative bleeding. Generally, measurement of hemoglobin levels is performed by an invasive method that takes blood samples to be tested. This study offers a tele-monitoring system for measuring the hemoglobin level non-invasively, so it could reduce the possibility of infection or contamination to the body and can be monitored anywhere by using a website. This tele-monitoring device of non-invasive hemoglobin and oxygen saturation levels were designed by integrating the pulse oximetry sensor with signal conditioning circuit, Arduino Uno as a microcontroller, Ethernet module, an internet network, cloud server, and website. Pulse oximetry measured the oxygen saturation in the blood that indicate the vital state of human and became essential to determine the amount of hemoglobin level. The system performance in this study was tested on participants who had a good daily exercise and participants who never had daily activities to discover the correlation between hemoglobin levels with human physical activity and obtained 89% of accuracy. This system can be implemented as a personal device for monitoring the hemoglobin level and the oxygen saturation in daily used.

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The stability of calibration model in measuring and mapping soil organic matter in a dry climatic area

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IOP Conference Series: Earth and Environmental Science 2021年第1期824卷

作者： B H Kusumo M H Idris Sukartono Mulyati L E Susilowati L A A Bakti Baharudin Y A Purwanto Bustan Department of Soil Science Faculty of Agriculture University of Mataram JL. Majapahit 62 Mataram Lombok NTB Indonesia Postgraduate Studies University of Mataram JL. Pendidikan 37 Mataram Lombok NTB Indonesia Forestry Study Program Faculty of Agriculture University of Mataram JL. Pendidikan 37 Mataram Lombok NTB Indonesia Department of Mechanical and Biosystem Engineering IPB University Indonesia

The increase of atmospheric CO2 concentration from soil organic matter (SOM) decomposition may contribute to the global warming and climate change. So, sequestering this greenhouse gas into SOM may be used to mitigate climate change. However, tedious procedures in measuring and mapping SOM need to be replaced with a method which works based on the reliability of calibration model developed. This research aimed to test the reliability of the calibration model that was built from a separate soil sample group to be used to measure and map SOM on other validation soil sample group, in the mostly dry climatic area of Kayangan Sub-district, North Lombok Indonesia. For this purpose, 300 soil samples were collected from the area using grid method, which were then dried, ground, sieved, analysed for SOM content using the Walkley and Black method, and scanned using Near Infrared Spectroscopy. The model built using calibration sample group was able to reliably measure and map the SOM content of the spectral data collected from the validation sample set. This is shown by the coefficient of determination (R2V = 0.79), root mean square error (RMSEV = 0.246%) and the ratio prediction to deviation (RPDV = 2.09). SOM maps generated from both laboratory and near infrared method can show very low, low and medium SOM content. These maps can be further used as a reference for applying organic fertilizers, avoiding excessive use of fertilizers, and monitoring soil carbon sequestration in mitigating climate change.

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Electrochemical performance of sodium titanate nanorods for sodium-ion battery anode applications

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AIP Conference Proceedings 2023年第1期2480卷

作者： Zikri Noer Siti Utari Rahayu Hilda Ayu Marlina Fauzi Handoko Susanto Sigit Rahardi Rifki Septawendar Bambang Sunendar Department of Physics Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Jl. Bioteknologi No.1 Medan Indonesia 20155 Integrated Research Laboratory Universitas Sumatera Utara Jl. Tridarma No. 8 Medan Sumatera Utara Indonesia 20155 Balai Besar Bahan dan Barang Teknik (B4T) Ministry of Industry of Indonesia Jl. Sangkuriang No.14 Bandung Jawa Barat Indonesia 40135 Center for Ceramics Ministry of Industry of Indonesia Jl. Akhmad Yani 392 Bandung Jawa Barat Indonesia 40272 Engineering Physics Study Program Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung Jawa Barat Indonesia 40132

In this study, the electrochemical performance of sodium titanate nanorods for sodium-ion battery anode applications was analyzed. Sodium titanate has been successfully prepared from the titanium (IV) Isopropoxide (TTIP) and sodium chloride (NaCl) precursor assisted by organic templates (ethylene glycol and citric acid) through a simple and hydrothermal template method, sodium titanate has been used to function in sodium-ion battery anodes. Manufacture of sodium titanate which is more environmentally friendly without the use of peroxides. Sodium titanate was initially prepared by mixing a solution of sodium precursor with a solution of titanium precursor at a stoichiometric mole ratio of 1.6: 1. Then, it was preheated through the hydrothermal method at 150°C for 6 hours, then calcined at 800°C for 1 hour in two burning situations which are different, namely reduction and oxidation. The same process is carried out in the synthesis of other samples without preheating treatment. Performance tests were carried out on sodium-ion batteries with calcined sodium titanate as the base ingredient. Preheating and combustion treatments in a reduced atmosphere are the optimum conditions for the formation of sodium titanate which produces sodium titanate type Na2Ti6O13. Galvanostatic charge/discharge performance produces a capacity of 43 mAh after 10 cycles.

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Coupled Hydraulic and Mechanics Finite Element Modeling of CO2 Injection into a Layered Isotropic Media Using FEHM

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IOP Conference Series: Earth and Environmental Science 2019年第1期318卷

作者： Herdis Haerusalam David P. Sahara Fatkhan Study Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Ganesha 10 Bandung 40132 Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Insitut Teknologi Bandung Ganesha 19 Bandung 40132 Indonesia Exploration and Engineering Seismology Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Ganesha 10 Bandung 40132 Indonesia

CO2 injection into the hydrocarbon reservoir affects the subsurface mechanics and hydraulic condition. The injection has to be performed in a way that there will be no reservoir and/or top seal failure. In such case, a simulation of the injected fluid propagation needs to be performed to see its possible impact to the top seal and existing major faults. We use finite element method to perform this injection simulation. In this research, we use open source software Finite Element Heat and Mass Transfer Code (FEHM) to simulate CO2 injection processes into reservoir. Subsurface geological model was constructed in a dimension of 3000 m (easting) x 3000 m (northing) x 2000 m (vertical). Vertically, it consists of four layers which represent upper layer (400 m), top seal (200 m), reservoir (900 m), and basement (500m). The grid around the reservoir rocks is refined to give more detail results. The open hole injection is set at 850 - 890 m depth, 1500 m easting and 1500 m northing. The material is assumed to be isotropic. The initial pressure and temperature increase as a function of depth with a pressure gradient of 0.00981 MPa/m and a temperature gradient of 0.025 degrees C/m. A vertical fault is modelled at 600 m eastern to the injection well. Injection process is carried out with 6 kg/s of CO2 injection with simulation time for ten years to see its impact to the fault. A vertical fault is The modelling results show that the CO2 injection will not reactivate the fault at 10 years.

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Weather prediction system and recommendation of plant varieties as an effort to minimize harvest failure with android-based Backpropagation Artificial Neural Networks

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IOP Conference Series: Materials Science and engineering 2021年第3期1098卷

作者： M Ahsan W Setiyaningsih B Rinanto M Susilowati I Sulistiyowati Informatics Study Program Faculty of Science and Technology Universitas Kanjuruhan Malang Jl. S. Supriadi No. 48 Malang Jawa Timur Indonesia Program Studi Sistem Informasi Fakultas Sain dan Teknologi Universitas Ma Chung Malang Jl. Villa PuncakTidar Blok N No. 1 Dau Malang Jawa Timur Indonesia Electrical Engineering Department Universitas Muhammadiyah Sidoarjo

Based on Malang Regency agriculture data in 2017 presented by the Head of the Agriculture and Food Crops and Horticulture Office (DPTPH), there was a 2.5% decrease in yields. One hectare of paddy land can produce 7.71 tons during normal weather, but currently only produces 6.9 tons per hectare. Three farmers' groups in Malang Regency (2018), are of the opinion that the current weather greatly influences crop failure. Weather prediction used so far using conventional benchmarks for planting, is no longer relevant to current reality. These estimates are often incorrect, resulting in crop failures, which have an impact on the farmer's economy. This study aims to make the application of weather prediction systems and recommendations for suitable planting varieties based on data on temperature, humidity, time of sun exposure, wind speed, and rainfall using Backpropagation ANN method. Data used for Karangploso District weather prediction from 2009-2018. While the variables used in the application of Backpropagation ANN: temperature, humidity, time of sun exposure, wind speed, and rainfall. For output, the prediction of rainfall in the next 12 months and planting of varieties in accordance with the predicted rainfall, OPT and land type. From the calculation results of this application the MSE error value of 0.0299 is obtained.

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Performance analysis of a standalone hybrid renewable electric generation system during fault condition

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Journal of Physics: Conference Series 2019年第1期1375卷

作者： A Pradipta I Sunaryantiningsih Electrical engineering study program Engineering faculty Universitas PGRI Madiun Madiun East Java Indonesia

There are several problems or disruptions to the hybrid system, including the availability of limited energy sources, transient conditions when some power plants or loads enter the system or out of the system and short circuit interruptions. The hybrid system used for testing includes photovoltaic system (PV), wind power generation system (WTGS), battery energy storage system (BESS) and load. The system is integrated on the DC bus. Testing for each interference condition is performed after the system is integrated. The parameters seen in this hybrid system performance analysis test are DC bus voltages and currents from each renewable plant. The results of this test will be used as data for hybrid system improvement in future research.

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The spectrum of city park service scope: case study of Lapangan Puputan Badung and Lapangan Puputan Margarana Denpasar-Bali

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IOP Conference Series: Earth and Environmental Science 2019年第1期396卷

作者： N Kohdrata G A M Suartika A A K Krisnandika L S Yusiana I M A Dharmadiatmika Landscape Architecture Study Program Faculty of Agriculture Udayana University Bali Indonesia Architecture Study Program Faculty of Engineering Udayana University Bali Indonesia

This research aims to find the spectrum of a park service scope from two city parks in Denpasar, a densely populated city. The city parks in study are Lapangan Puputan Badung and Lapangan Puputan Margarana as city public facilities of Denpasar – Bali that is said to improve citizen quality of life and environment as well. However, this research focuses to see how city parks in Bali serve their users. This study uses a survey research method. Sample of respondents are chosen using accidental sampling technique with questionnaire as media of data collection. Data series include, users' age, frequency of visit, activities, and domicile. Research findings are analysed spatially and descriptively as well. Result shows that most visitors are young people who spend time mostly for exercising and other recreational activities. It is also interesting to see that both city park users are regular visitors. They visit the parks at least 1 to 2 time per week and spend 1 to 2 hours in there. The parks users mostly come from densely populated areas. That shows the importance of city parks as complement to a city. However, as a city that going to smart city, ICT has not been recognized much. As conclusion, the spectrum of city parks service scope of Denpasar still ranging in traditional functions of public green open space. A city park serves a man-made nature-like place for people to get refresh within an urban landscape setting.

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Parameter processes and their impact on Tinospora cordifolia stem extracts for antibacterial and antioxidant materials

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Materials Today: Proceedings 2023年

作者： Ahmad Royani Muhammad Hanafi Puspa Dewi N. Lotulung Muhammad Eka Prastya Chandrabhan Verma Akram Alfantazi Azwar Manaf Postgraduate Program of Materials Science Study Department of Physics Faculty of Mathematics and Natural Sciences Universitas Indonesia Depok 16424 Indonesia Research Center for Metallurgy National Research and Innovation Agency (BRIN) Tangerang Selatan Banten 15314 Indonesia Research Center for Pharmaceutical Ingredients and Traditional Medicine National Research and Innovation Agency (BRIN) Tangerang Selatan Banten 15314 Indonesia Research Center for Chemistry National Research and Innovation Agency (BRIN) Tangerang Selatan Banten 15314 Indonesia Department of Chemical Engineering Khalifa University of Science and Technology P. O. Box 127788 Abu Dhabi United Arab Emirates

This work extracted the Tinospora cordifolia stem for antibacterial and antioxidant materials. The stems of T. cordifolia were extracted by using a simple maceration method. The effect of three independent variables (solvent ratios, temperature, and extraction time) was investigated to obtain optimal conditions. Ten grams of T. cordifolia were extracted using a mixture of methanol–water ratios 00:100, 15:85, 30:70, and 45:55 (% v/v) at 50–95 °C for 0.5 to 3 h. The total phenolic and flavonoid content in the T. cordifolia extracts was analyzed by Folin-Ciocalteu and Colorimetric-AlCl 3 methods. The antibacterial activities against Pseudomonas aeruginosa were assessed by serial dilution methods, and antioxidant properties were performed by DPPH methods. The optimum condition was achieved at methanol–water ratios of 00:100 % (v/v) at 95 °C for 2 h. The yield extraction for this condition is around 13.97%. The total phenolic and flavonoid contents for these conditions are about 6.85% and 7.07%, respectively. The minimum inhibitory concentration value against P. aeruginosa is 1024 µg/mL, and the minimum bacterial concentration is above 2048 µg/mL. Meanwhile, the antioxidant obtained is 217.55 µg/mL at a ratio of 00:100 methanol–water. The extraction process parameters significantly influenced the phytochemical (TPC and TFC), antibacterial activity, and antioxidant properties of T. cordifolia stem extracts. This work clearly shows the antibacterial potential of T. cordifolia stem extracts, suggesting that more investigation is required to isolate the bioactive compounds in this extract.

关键词： Antibacterial Antioxidant Maceration Parameter effect P. aeruginosa T. cordifolia

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Design prototype of audio guidance system for blind by using raspberry pi and fuzzy logic controller

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Journal of Physics: Conference Series 2019年第1期1230卷

作者： Ni'matul Ma'muriyah Andik Yulianto Lili Electrical Engineering Study Program Faculty of Industrial Technology Universitas Internasional Batam

With almost 3.75 million people with visually impaired in Indonesia, according to statistical data shown that most of them not live in prosperity. To increase their productivity they need an assistive device that's allows them to navigate freely. This paper presents a novel Audio guidance system for blind in the shape of simple bag with earphone for giving them an audio guidance efficiently and safety. Different with other audio guidance, we propose a simple system consist of Raspberry Pi Camera and Ultrasonic Sensor as input, Raspberry Pi, Earphone and Power bank. This system is initiated by providing a voice command of the direction where the blind person must walk or go through, so they can avoid from obstacles. We also apply Fuzzy Logic Controller (FLC) to detect the obstacles along they walk by using 3 ultrasonic sensors. The experimental result shows that by using FLC and interfacing by Raspberry Pi the proposed system can effectively to detect the obstacles and give direction with 2.32% distance error.

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