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The effect of lard concentration and ozonation on changes in polarization angle of olive oil

Journal of Physics: Conference Series 2021年第1期1943卷

作者： F A Saputra M Azam F Arianto K F Sofjan H Sugito I Alkian Department of Physics Faculty of Science and Mathematics Diponegoro University Semarang Indonesia 50275 Study Program of Automation Engineering Technology Vocational School Diponegoro University

This research aims to analyze the effect of ozone exposure time and lard mixture on the polarization angle of transmission of olive oil. The study uses a transmission polarization method with a laser (λ = 532 nm) as a light source. The research sample in the form of olive oil mixed with lard at a concentration of 10, 20, 40, and 80%, with an ozone exposure time of 0-30 minutes. The sample is subjected to external electric fields with variations from 0-4.5 x 102 kV/m to increase the change's polarization angle. The results showed that the change in polarization angle would change linearly with the increase in lard concentration with olive oil. Olive oil with a low concentration of lard (10%) experienced an increase in the change in polarization angle with a value of 0.31 ° due to the effect of 90 minutes of ozone exposure. In general, the results of the study showed that increased concentrations of lard, ozone exposure time, electric field strengths caused an increase in changes in the polarization angle in a mixture of olive oil and lard.

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Characteristics of gradual discharging process on a thermosyphon SWH tank containing PCM 4

Characteristics of gradual discharging process on a thermosy...

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4th International Conference on Science and Technology, ICST 2018

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

ISBN: (纸本)9781538658130

This paper aims to reveal the characteristics of thermal energy release in a solar water heater (SWH) tank involving phase change materials (PCM) as thermal energy storage material. A bundle of cylindrical capsules was inserted in 31.37 liters of SWH tank. The capsule contains paraffin wax as latent type heat storage. K type thermocouples were mounted on the water side and the PCM side. Experiments was begun with the charging process using solar energy until water temperature exceeds the melting temperature of PCM. After that, a gradual discharging process is done to release the thermal energy from the tank. The SWH tank containing 17.3 liters of water can produce 60 liters of hot water with an average water temperature of 45.13 °. This condition is achieved when the average daily radiation intensity is 699.92 W/m2. The PCM has contributed in storing thermal energy during the discharging process. © 2018 IEEE.

关键词： Phase change materials

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Automating CAD for creating assembly structure from Bill of Materials

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IOP Conference Series: Materials Science and engineering 2021年第1期1034卷

作者： Nanang Ali Sutisna Nasir Widha Setyanto Mechanical Engineering Department Faculty of Engineering President University Jababeka Education Park Jl. Ki HajarDewantara Cikarang Bekasi 17550 Indonesia Professional Engineer Study Program Faculty of Engineering Brawijaya University Jl. MT Haryono 167 Malang 65145 Indonesia

This paper presents the development of an add-on for CAD system generating assembly structure automatically based on a given Bill of Materials (BOM). The BOM in Excel format is scanned by the system and the system arrange 3D CAD files into assembly at in CATIA V5 CAD system automatically. This program has been tested and succeeded well at compiling 3D assembly based on 3D part file data that is available or not available. If the 3D file is not available then the 3D assembly is still generated according to the assembly structure listed on Excel file but its 3D representation does not appear.

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Concrete Brick Production Using a Mixture of Paint Waste by Solidification Process

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IOP Conference Series: Materials Science and engineering 2021年第1期1053卷

作者： P Purwanto S Sudarno A D P Citra Green Technology Research Center School of Postgraduate Studies Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia Department of Environmental Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia Study Program of Optometry Universitas Widya Husada Semarang Semarang Indonesia

Unutilized hazardous and toxic waste requires management and landfill costs. Hazardous and toxic paint waste can be used as additional raw material to make brick products through solidification. Concrete bricks are made from a mixture of cement (1 part) and sand (14 parts) with the addition of water for mixing purpose. The mixture composition is 0,1,2,4,6, and 8% by using paint waste as the raw material added. Then, the quality of concrete brick products is tested on compressive strength and water permeability. The test results can be used as recommendations for the use of paint waste into products and reduce waste management costs.

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Effect of pH and Extraction Time on Isolation Proteins from Red Kupang (Musculita Senhousia)

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Journal of Physics: Conference Series 2021年第1期1899卷

作者： S S Santi F Maulida S Khumairoh TPD Rahmani Chemical Engineering Department Faculty of Engineering UPN 'Veteran' Jawa Timur Jl. Raya Rungkut Madya Gunung Anyar Surabaya 60294 Biology Program Study Walisongo State Islamic Semarang

Red Kupang (Musculista senhausia) is one of the fisheries resources included in the bivalve class. Red Kupang is commonly found in the waters of Surabaya, Sidoarjo, Pasuruan, and the coast of the Madura Strait. The nutritional components contained in red mussel meat include 75.48% water content, 1.93% ash content, 15.02% protein, 6.17% fat, and 1.41% carbohydrate. The nutrient content of red mussels that can be utilized is protein. So that red mussels can be used as an alternative source of animal protein. For this reason, this research is carried out namely isolation of proteins against red mussels. Isolation can be carried out by means of extraction, where the pH and time of extraction affect this process. The research began with washing and drying the red mussels at 40oC until a constant weight (± 6 hours) was obtained. The second stage is making red mussel flour with 60 mesh particle size. The third step is the isolation of red mussel protein by extraction process that is 50 grams of red mussel flour homogenized in aquadest with a ratio of 1:10 w / v, then extraction is carried out at an alkaline pH (pH: 9, 10, 11, 12 and 13). at a temperature of 40 oC using a hot plate stirrer for 10, 20, 30, 40 and 50 minutes. The results obtained the best conditions at pH 11 and 50 minutes extraction time with a protein content of 72.70%.

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Wisdom of Crowds for Supporting the Safety Evaluation of Nanomaterials

SSRN

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SSRN 2025年

作者： Saarimäki, Laura Aliisa Fratello, Michele del Giudice, Giusy Di Lieto, Emanuele Afantitis, Antreas Alenius, Harri Chiavazzo, Eliodoro Gulumian, Mary Karisola, Piia Lynch, Iseult Mancardi, Giulia Melagraki, Georgia Netti, Paolo A. Papadiamantis, Anastasios G. Peijnenburg, Willie Santos, Hélder A. Serchi, Tommaso Shahbazi, Mohammad-Ali Stoeger, Tobias Valsami-Jones, Eugenia Vivo, Paola Vrček, Ivana Vinković Vogel, Ulla Wick, Peter Winkler, David A. Serra, Angela Greco, Dario Faculty of Medicine and Health Technology Tampere University Tampere33520 Finland Division of Pharmaceutical Biosciences Faculty of Pharmacy University of Helsinki Helsinki00790 Finland NovaMechanics Ltd Nicosia Cyprus Institute of Environmental Medicine Karolinska Institutet Stockholm171 77 Sweden Research Program Medical Faculty University of Helsinki Helsinki00290 Finland Politecnico di Torino Corso Duca degli Abruzzi 24 Torino10129 Italy National Institute for Occupational Health National Health Laboratory Services Johannesburg South Africa School of Geography Earth and Environmental Sciences University of Birmingham Birmingham United Kingdom Division of Physical Sciences and Applications Hellenic Military Academy Vari Greece Interdisciplinary Research Centre on Biomaterials-CRIB University of Napoli Federico II P.le Tecchio 80 Napoli80125 Italy Institute of Environmental Sciences Leiden University Leiden Netherlands National Institute of Public Health and the Environment Center for Safety of Products and Substances Bilthoven Netherlands University of Groningen Groningen Netherlands Drug Research Program Division of Pharmaceutical Chemistry and Technology Faculty of Pharmacy University of Helsinki Helsinki Finland Luxembourg Institute of Science and Technology 5 Avenue des Hauts Fourneaux Eschsur-Alzette4362 Luxembourg Munich Germany Solar Cells Faculty of Engineering and Natural Sciences Tampere University P.O. Box 541 TampereFI-33014 Finland Institute for Medical Research and Occupational Health Zagreb Croatia National Research Centre for the Working Environment Copenhagen ODK-2100 Denmark Lerchenfeldstrasse 5 St. Gallen9014 Switzerland La Trobe Institute of Molecular Science La Trobe University Bundoora3086 Australia Monash Institute of Pharmaceutical Sciences Monash University Parkville3052 Australia School of Pharmacy University of Nottingham NottinghamNG7 2QL United Kingdom Tampere Institute for Advanced Study

The development of new approach methodologies (NAMs) to replace current in vivo testing for the safety assessment of engineered nanomaterials (ENMs) is hindered by the scarcity of validated experimental data for a broad range of ENMs. We introduce a framework to address this challenge by harnessing the collective expertise of professionals from multiple complementary and related fields (‘wisdom of crowds’ or WoC). By integrating expert insights, we aim to fill data gaps and generate consensus concern scores for diverse ENMs, thereby enhancing the predictive power of nanosafety computational models. Our investigation reveals an alignment between expert opinion and experimental data, providing robust estimations of concern levels. Building upon these findings, we employ predictive machine learning models trained on the newly defined concern scores, ENM descriptors, and gene expression profiles, to quantify potential harm across various toxicity endpoints. These models further revealed key genes potentially involved in underlying toxicity mechanisms. Notably, genes associated with metal ion homeostasis, inflammation, and oxidative stress emerge as predictors of ENM toxicity across diverse endpoints. This study showcases the value of integrating expert knowledge and computational modeling to address the complexity of nanomaterial safety. Our work suggests that this interdisciplinary approach enhances the accuracy and efficiency of safety assessment in the rapidly evolving landscape of nanotechnology. © 2025, The Authors. All rights reserved.

关键词： Nanoclay

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The J-value as the measurement tool of the bonds investor's behavior

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AIP Conference Proceedings 2021年第1期2331卷

作者： Josep Ginting Lydia Anggraini 1Study Program of Accounting Faculty of Business President University Jl. Ki Hajar Dewantara Jababeka Education Park Cikarang Baru Bekasi 17550 Indonesia 2Study Program of Mechanical Engineering Faculty of Engineering President University Jl. Ki Hajar Dewantara Jababeka Education Park Cikarang Baru Bekasi 17550 Indonesia

For many years, mathematics has been used to solve the problem in economic and finance instead of natural science and engineering. This paper shows how accurate mathematics reads financial behavior. One of the financial areas using the mathematics approach is the bond valuation technique. Bond is one of the long term debt instruments. The finding in this research is that mathematics can be used to read the changes in the concept of a pricing model where the par value of bonds is always going to 100% at the maturity date. Theoretically, the bonds fair price is resulted by calculating the present value of future coupon interest of bonds, but not in practice, caused by the bonds investor behavior. The difference in price, resulted from both different approaches, in this paper is defined by a new mathematical concept to reflect the bonds' investor behavior. It is the aim of this research. To address the differences, we have evaluated the fair price of bonds calculation by creating new mathematics equations by combining the calculation of the present value of future coupon interest of bonds with the market concept models. The result is a new mathematical model called J-Value. To prove the eligibility of J-Value, a simulation was done. The mathematics model in this paper is found by combining the usage of a qualitative method and supported by a quantitative method.

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Simulink Matlab applications program in power system: study of effect of simulink matlab program acceptance in power system analysis

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IOP Conference Series: Materials Science and engineering 2021年第2期1098卷

作者： D Aiz P Gendroyono Electrical Engineering Education Study Program Faculty of Engineering Universitas Negeri Jakarta Jl. R.Mangun Muka Raya RT. 11/RW. 14 Rawamangun Jakarta Indonesia

The Simulink Matlab application program in electrical power system analysis needs acceptance from its users. This research is purposed to investigate the effect of Simulink Matlab application program acceptance to power system analysis. This research uses a quantified approach. The sample of this research is 119 students using the Simulink Matlab application program to do power system analysis. The data is analyzed with path analysis with the Partial Least Square approach. The result shows that the perception of ease has a direct effect to the perception of usage, behavior, and intention to use the Simulink application program with the path coefficient of 0.581, 0.574, and 0.249 respectively; the perception of usage and easiness in the usage of the Simulink application program has a direct effect to behavior in using the Simulink application program with the path coefficient of 0.218 and 0.574 respectively; the behavior in using the Simulink application program has a direct effect to the intention in using the Simulink application program with the path coefficient of 0.581, and the intention in using Simulink application program has a direct effect to the usage of the real Simulink Matlab application program with the path coefficient of 0.491. This research concludes that the usage of the Simulink application program for power system analysis is affected by the easiness and the usage of the application as well as the attitude of users.

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The study of Sedimentation at Jongkong Reservoir in District Central of Bangka through Erosion of Catchment Area

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IOP Conference Series: Earth and Environmental Science 2020年第1期537卷

作者： Miskar Maini Mashuri Civil Engineering Study Program Faculty of Infrastructure and Regional Engineering Institut Teknologi Sumatera Indonesia

Jongkong reservoir creates a reservoir of water that is used for the purposes of raw water as fundamental media for improvement of drinking water production especially at dry season for the District of Koba. The advantage of being able to hold water in wet season and releasing it in dry season will be detained if the life storage of the reservoir can be utilized effectively, but sedimentation problem will decrease its volume which can influence the life time of reservoir. Finally the reservoir becomes less effective, so it is very important to study. The method which is used to predict an average erosion rate in the catchment area considers factors of rain erosivity, soil erodibility, ground inclination of slope or slope length, management of crop and land, soil conservation. Calculation was done by using the USLE equation (Universal Soil Loss Equation) which was developed by Wischmeier and Smith (1965, 1978). From this research result, the prediction of surface erosion rate in the basin catchment area in the year 2019 is equal to 53.20 mm/year or equivalent with 62,491.92 m3/year, and the value of Sediment Delivery Ratio (SDR) is equal to 32,28 %. The number of material which eroded is equal to 957.59 Ton/Ha/year so it is classified into the medium erosion class category. The dead storage of 5% of the the volume of the reservoir cage will be fully charged in the year 2022 or for 3 The next year and the total volume of the reservoir Ridge will be full of sediment in the year 2062 or 43 years.

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The effect of sea water corrosion on tensile strength of combination welded joint of stainless steel 304-201

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IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： Tjokorda Gde Tirta Nindhia I Wayan Surata I Wayan Bandem Adnyana I Gusti Komang Dwijana Study Program of Mechanical engineering Engineering faculty Udayana University JimbaranBali Indonesia 80361

Construction installations built with stainless steel are the main choice of the list of materials that can be used for construction near the sea. With the recent discovery of tungsten inert gas (TIG) technology, construction with stainless steel can be realized. In some cases stainless steel welding joints are made by connecting with stainless steel of different types without regard to the strength generated especially if experiencing corrosion in this case corrosion due to sea water. In this study the tensile strength of stainless steel combination joints of type 304-201 was tested and compared with similar joints of types 304-304 and 201-201. The effect of seawater corrosion on the tensile strength of stainless steel joints was also examined. This research found that the highest tensile strength is 304-304 joints followed by 304-201 combination connections and the lowest is 201-201 joints. The effect of seawater corrosion is known to reduce the tensile strength of all types of joints.

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