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5th International Conference on Technology and Vocational Teachers, ICTVT 2019

作者： Daryono, R.W. Yolando, A.P. Jaedun, A. Hidayat, N. Postgraduate Program of Technological and Vocational Education Universitas Negeri Yogyakarta Yogyakarta Indonesia Department of Civil and Planning Education Faculty of Engineering Universitas Negeri Yogyakarta Yogyakarta Indonesia

This study aims to find out how much the needs of personal competence, basic knowledge, and work skills of vocational graduates Construction and Property Technology Expertise program by the world of Construction Services Industry which is engaged in the Field Supervision Consultant. The method used to select the sample is the quota sampling and snowball sampling method where the sample is 15 companies with a population of 136 companies. The results of this study draw conclusions as follows: (1) overall competence of vocational school graduates construction and property technology expertise program included in the "very needed" category with value of 81,52 (2) personal competence included in the "very needed" category with value of 86,59, (3) basic knowledge competence included in the "needed" category with value of 80,52, and (4) competence of work skills is included in the "needed" category with a value of 78.60. © Published under licence by IOP Publishing Ltd.

关键词： Construction industry

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Mini-Review: The potential of raffinose as a prebiotic

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IOP Conference Series: Earth and Environmental Science 2022年第1期980卷

作者： A A Anggraeni Culinary Science Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

Prebiotics are dietary fiber components that cannot be digested by the human gastrointestinal tract but can be selectively fermented by bacteria in the gastrointestinal tract. Therefore, prebiotics provides health effects for humans. The specificity of prebiotics is determined by the bacteria that are specifically capable of fermenting the prebiotic substrate. The characteristics of prebiotic substrate need to be investigated in-vitro and in-vivo to determine the function and effectiveness of the substrate as a prebiotic. The prebiotic production process must be able to keep the prebiotic components stable. Raffinose is an oligosaccharide that has potential as a prebiotic. This article will discuss raffinose chemical structure, degrading enzymes, and health benefits as a prebiotic. Raffinose consists of 3 monomers, namely α-D-galactose, α-D-glucose, and α-D-fructose. Substrates containing raffinose-family oligosaccharides (RFOs) are the source of raffinose. Those substrates can be degraded to raffinose by the α-1,6-galactosidase. Raffinose can increase the growth of lactic acid bacteria, suppress the growth of pathogenic bacteria, increase short-chain fatty acids (SCFA), reduce constipation, inhibit the formation of putrefactive compounds from protein, and reduce the risk of cardiovascular diseases.

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By-products of Baru and Monguba: A review of their potential

Food and Humanity

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Food and Humanity 2025年 4卷

作者： Miranda, Bruna Melo Tovar, Beatriz Carolina Alvez Otero, Deborah Murowaniecki da Silva, Flávio Alves Scalize, Paulo Sergio de Oliveira, Tatianne Ferreira Department of Food Science Nutrition School Federal University of Bahia Canela Campus Bahia Salvador Brazil Department of Food Engineering Agronomy School Federal University of Goiás Goiás Goiânia Brazil Institute of Experimental Biology Faculty of Sciences Central University of Venezuela Caracas Venezuela Graduate Program in Food Science Faculty of Pharmacy Federal University of Bahia Campus Ondina Bahia Salvador Brazil Graduate Program in Food Nutrition and Health Nutrition School Federal University of Bahia Campus Canela Bahia Salvador Brazil School of Civil and Environmental Engineering Federal University of Goiás Goiás Goiânia Brazil

During food processing, large amounts of waste are generated, which compromise the environment and society. The valorization of agri-food by-products has been investigated as a solution to obtain clean energy and value-added materials, improving food security and production profitability. This research focuses on the by-products of baru (Dipteryx alata Vog.) and monguba (Pachira aquatica Aubl.), discussing their applications and biotechnological perspectives. A critical review of the parameters related to the valorization of these by-products was conducted, using publications from 2013 to 2023, prioritizing studies that presented new knowledge. An increase in publications on the topic was observed starting in 2020, with Brazil leading, followed by India, Portugal, and Singapore. Although still underexplored, eight areas of knowledge were identified, with emphasis on food science and chemistry. Monguba lacks technological exploitation and economic value, while baru, despite being more documented, remains underutilized. Both fruits have fractions (epicarp, mesocarp, and endocarp) that are often considered waste but are of scientific interest. The mesocarp of baru is rich in proteins, lipids, carbohydrates, and phenolic compounds with high antioxidant capacity. The by-products of baru and monguba can be used in the extraction of nutraceutical compounds, in the transformation into biomaterials for water impurity removal, in renewable energy production, in food enrichment, and as ingredients in animal feed, improving the quality of eggs and meat. The use of these by-products offers economic and environmental advantages, reducing contamination caused by the improper disposal of agro-industrial waste. It is essential to promote their commercial exploitation and potential applications. © 2024 Elsevier B.V.

关键词： Bioactive compounds Biomaterials By-products application Functional foods Residues recovery Sustainable agriculture

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Application of green architecture concepts in Wanakota apartments

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AIP Conference Proceedings 2022年第1期2453卷

作者： A. Andiyan Abdul Gani Alfarizi Architecture Study Program Faculty of Science and Engineering Universitas Faletehan Bandung Indonesia

The shrinking land in urban areas and the worsening world climate crisis have created a new residential development problem. One way to maximize land designated for residential use is to build vertical housing, such as constructing flats and apartments that can accommodate more residents in a limited area. However, it also creates new problems because the use of energy required for a building will be extensive. The application of Green Architecture is an effort to reduce energy use for buildings and reduce the negative impact of buildings on the environment. one helpful reference is applying green architectural concepts. The apartment Wanakota is designed using the green building concept with the Indonesian Green Building Council (GBCI). Wanaka means City Forest, and trees inspire this name as trees. This tree is not only an aesthetic enhancer but as a CO2 absorber and oxygen supplier in the environment.

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Taguchi optimization and analysis of variance for thermoelectric generators with forced convection air cooling

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Applied Thermal engineering 2023年 231卷

作者： Chen, Wei-Hsin Carrera Uribe, Manuel Luo, Ding Jin, Liwen Huat Saw, Lip Lamba, Ravita Department of Aeronautics and Astronautics National Cheng Kung University Tainan701 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung407 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology Taichung411 Taiwan International Master Degree Program on Energy Engineering National Cheng Kung University Tainan701 Taiwan College of Electrical Engineering & New Energy China Three Gorges University Yichang443000 China Institute of Building Environment and Sustainable Technology School of Human Settlements and Civil Engineering Xi'an Jiaotong University Xi'an China Lee Kong Chian Faculty of Engineering and Science Tunku Abdul Rahman University Kajang43000 Malaysia Department of Electrical Engineering Malaviya National Institute of Technology Jaipur India

In recent years, humanity has experienced the effects of using unsustainable energy sources that pollute the environment while being inefficient. Most of the primary energy input used in energy conversion processes is lost in the form of heat. Thermoelectric generators (TEGs) have the potential to recover some of this wasted heat;however, their low energy conversion efficiency needs to be addressed. Previous literature has shown effective optimization of thermoelectric generation systems through statistical tools such as the Taguchi method that optimized all the parameters that affect the outcome of the system. To this date, no research has considered wind speed for convection heat transfer as one of the optimizable parameters. This study aims to optimize the operating conditions of commercially available TEGs that are cooled by forced convection simulating naturally occurring wind speeds and operate under low-quality waste heat temperatures to improve the TEG performance further. Two commercially available TEGs are optimized via the Taguchi method. The Taguchi method is implemented with three parameters and three levels, making an L9 orthogonal array. The objective function is the maximum output power. The optimized parameters are the hot side temperature, the heat sink size, and the wind airspeed. Analysis of variance (ANOVA) is used alongside the Taguchi orthogonal array for the statistical analysis of the results. The optimization results show that the hot side temperature is the most influential parameter to the output power. In addition, the change in the heat sink size also significantly influences the output power, whereas the impact of the wind speed is not as significant. In addition, interaction analysis between the parameters is performed. The Taguchi method yields satisfactory optimization results. The optimized system yields 0.65 W of power at 140 °C hot side temperature, Model K402 heat sink, and 3.7 m·s−1 wind speed. The influence of the air velocity

关键词： Design of experiments

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A bibliometric analysis of entrepreneurship research using VOSviewer

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AIP Conference Proceedings 2023年第1期2592卷

作者： P. Fithri R. Prima Lita D. Games A. Hasan D. Maharani V. Kiswara Doctoral Study Program in Management Faculty of Economics Universitas Andalas Padang Indonesia Department of Management Faculty of Economic Universitas Andalas Padang Indonesia Department of Industrial Engineering Faculty of Engineering Universitas Andalas Padang Indonesia

Academic entrepreneurship is an activity that refers to researchers at universities who commercialize university research through business activities. Academic entrepreneurship can also be interpreted as a process of creating economic value through the creation, renewal, and organizational innovation that occurs inside and outside the university which results in the commercialization of research and technology transfer. The importance of academic entrepreneurship at the university level is directed to change the traditional view to a new view that sees Higher Education as an educational institution but is able to generate financial resources to cover operational costs. The purpose of this study is to analyze the extent to which academic research on entrepreneurship has been carried out. The research methodology used is literature review, by identifying entrepreneurship academic journals through the assistance of Scopus and Vosviewer. Based on the analysis, it was found that many journal publications on academic entrepreneurship were carried out in 2012. The research method used was mostly a qualitative method, with a literature review analysis. Then this type of paper is mostly in the Q1 quartile, countries that apply academic entrepreneurship a lot are the United States and England.

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The effects of fermentation duration on chemical properties, physical properties, and organoleptic of Butterfly Pea Kombucha

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AIP Conference Proceedings 2023年第1期2634卷

作者： Rina Rifqie Mariana Soenar Soekopitojo Monita Putri Rusadi Culinary Education Study Program Faculty of Engineering Universitas Negeri Malang. Semarang 5 Malang East Java Indonesia

Kombucha tea is a traditional fermented beverage product of tea and sugar solution using kombucha starter culture (Acetobacter xylinum and some types of yeast) that has some health effects, among others, as an antioxidant, antibacterial, endurance improvement, and others. This study aimed to determine the impact of time fermentation on the chemical properties (capacity of antioxidants, sugar content, alcohol content, and pH value), the physical properties (colour), and the organoleptic properties of butterfly pea kombucha tea. This research used explorative and descriptive methods. The treatment was fermentation time: 0-day, 3 days, 6 days and 9 days against chemical, physical, and organoleptic properties of the butterfly pea kombucha. The research design used the Completely Randomized Design (CRD) with two repetitions for each treatment. The data were analyzed using ANOVA with a further DMRT test. This study showed that the duration of fermentation affects the antioxidant capacity, sugar content, pH and alcohol content, the colour's physical properties, and the organoleptic properties of butterfly pea kombucha. The results showed that 9 days of the time fermentation had the highest value of colour brightness (L) 20.3875, reddish (a+) 20.195, antioxidant of 42.77600 ppm, alcohol content 0.735% and had a taste organoleptic value of 3.98, and the colour hedonic score of 4.16. Meanwhile, 0-day fermentation had the highest value of a blue colour level (b-) of 2.76, the sugar content of 14.600 %, and had highest aroma organoleptic value of 3.9. A fermentation time of 9 days was not recommended for production.

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Simulation of arrow-shaped micromixer with obstacles in blood plasma mixing

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AIP Conference Proceedings 2024年第1期3080卷

作者： Ziyan Muhammad Aqsha Basari Mohammad Akita Indianto Ridho Irwansyah Muhammad Satrio Utomo Siti Fauziyah Rahman Biomedical Engineering Study Program Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Research Center for Biomedical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Energy Systems Engineering Graduate Program Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Research Center for Metallurgy National Research and Innovation Agency Komplek PUSPIPTEK Setu Tangerang Selatan Banten 15314 Indonesia

In recent years, several applications of micromixers have been reported to have a number of advantages, including the use of small amounts of plasma, short reaction times, and good reaction efficiency. The samples analyzed in this study were blood plasma and distilled water. The process is carried out by passive mixing which is based on a microchannel structure to enhance the diffusion of molecules for efficient mixing. The arrow shape was chosen as the micromixer design because it has a better blending performance than the T and Y shapes. The types of obstacles also used to improve the mixing process. The simulation was carried out on COMSOL Multiphysics software version 5.6. The results showed better mixing results for the micromixer design with triangle right facing obstacles with the highest Reynolds number was 9.4326. Then followed by ellips obstacles with a value of 9.4322, then without obstacles that is 9.4309, after that the triangle left facing with a value of 9.4006, and finally the lowest Reynolds number is a design with a diamond obstacles of 9.2514.

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Unit processes identification of maintenance on rigid and flexible pavement of local road 7

Unit processes identification of maintenance on rigid and fl...

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7th International Conference on Euro Asia civil engineering Forum, EACEF 2019

作者： Handayani, F.S. Pramesti, F.P. Setyawan, A. Doctoral Program in Civil Engineering Faculty of Engineering Sebelas Maret University Surakarta Indonesia Civil Engineering Department Faculty of Engineering Sebelas Maret University Surakarta Indonesia Civil Engineering Department Faculty of Engineering Sebelas Maret University Surakarta Indonesia

Maintenance and rehabilitation as parts of pavement's life cycle become more important since it's an effort to restore the road condition as planned. This process will produce the emission of greenhouse gases that give an impact to the environment. The Live Cycle Assessment (LCA) was used to estimate the GHG's emissions. With LCA we could identify the unit process that will produce the GHG's emissions during maintenance and rehabilitation of road pavement. This research aimed to identify the unit processes of the maintenance and rehabilitation of rigid and flexible pavement and to analyse the amount of GHG emitted during this process. Four local roads in Indonesia were investigated as case studies. The result indicated the amount of energy of the unit processes as well as the GHG amount. This will lead to the identification of the hotspot of flexible and rigid pavement maintenance process. In rigid pavement maintenance activities, the hotspots included the asphalt transport process to asphalt mixing plant, cement transportation to the batching plant, and cement processing. Meanwhile, in flexible pavement maintenance activities, the hotspots were the asphalt transportation to asphalt mixing plant, transportation aggregate, and transportation to site. © Published under licence by IOP Publishing Ltd.

关键词： Asphalt

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A study on Durability for Rigid Pavement Against Acid Environment and Displacement Model

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IOP Conference Series: Materials Science and engineering 2021年第1期1144卷

作者： Wahyu Widodo Civil Engineering Study Program Faculty of Engineering Universitas Muhammadiyah Yogyakarta Indonesia.

An acidic environment commonly found in peat soils or expansive soil will harm the quality of rigid pavement by considering its use at long-life plan, traffic load, and minimization of damage to the crossroad due to vehicle braking. As a concrete provider, chemical admixture as mixed materials today is widely used with the reasons of workability, initial strength, as well as saving of material used. This research aimed to find out the durability of concrete admixture using sika-NN and plastocrete (retarding and water reducing admixture) at the acid environment and knowing the displacement that occurred using ABAQUS software modeling. It used the laboratory experimental method and the cube concrete sample 15×15×15 cm with the compressive strength of 33.2 MPa. A total of 18 concrete samples were immersed using normal pH water and H2SO4 at pH 1 ± 1 tested at 3, 7, 14, 28, 60, and 90 days using the Duplo method. In this research, the concrete durability was carried out using, Ultrasonic Pulse Velocity Test (UPVT) to test the density, compressive test, and modeling concrete displacement on peat soils with vehicle loads in acidic environments using software ABAQUS. The mixed design results show an average setting time value of about 112 minutes. Coarse aggregate and cement decrease due to additives is approximately 24% and 18% respectively, increasing the use of fine aggregate to 16.49%, but the value of concrete density increases base on soaking time. Besides that, there is a decrease in compressive strength up to 16% at the age of 90 days. The value of displacement in the modelled pavement uses a maximum load of 8 tons each 2.994 mm for concrete with normal water and 3.045 mm for concrete with an acid environment respectively. Concrete soaked in acid water is the greatest deformation that occurred in rigid pavement using ABAQUS and indicates that acid water has an impact on decreasing concrete quality.

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