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A bibliometric analysis of entrepreneurship research using VOSviewer

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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Towards a web simulator for optimizing the placement of mesh nodes in a wireless mesh network

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Procedia Computer Science 2025年 257卷 684-689页

作者： Frank Miche Jean Louis Kedieng Ebongue Fendji Nelson Maguelva Mafai Marcellin Atemkeng Department Mathematics and Computer Science Faculty of Science University of Ngaoundere 454 Ngaoundere Cameroon Centre for Research Experimentation and Production School of Chemical Engineering and Mineral Industries University of Ngaoundere 454 Ngaoundere Cameroon Stellenbosch Institute for Advanced Study (STIAS) Wallenberg Research Centre at Stellenbosch University Stellenbosch South Africa National Committee for Development of Technologies Ministry of Scientific Research and Innovation P.O. Box 1457 Yaounde Cameroon Department of Mathematics Rhodes University P.O. Box 6140 Grahamstown South Africa

Wireless mesh networks offer a promising solution for bridging the digital divide. Utilizing multi-hop communication, these networks can extend the coverage of conventional wireless systems to cover larger areas. However, their deployment requires careful planning, typically preceded by simulations to determine the optimal placement of routers. While several simulators exist for wireless network planning and performance analysis, they often pose significant challenges. Most are complex, requiring advanced expertise in programming and network administration, making them inaccessible to non-experts. This complexity hinders community-driven deployment efforts, particularly in regions where local expertise is scarce. To address these challenges, this work aims to simplify the deployment process by developing a user-friendly simulator for planning wireless mesh networks and determining the geographic placement of routers in a target area. We created a web-based simulator using the GeoDjango framework. The planning process leverages a multi-objective node placement optimization model to identify optimal router locations.

关键词： Simulator Wireless Mesh Network Multi-objective Optimization Planning Web application

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Evaluating the impacts of environmental and human health of the critical minerals mining and processing industries in Indonesia using life cycle assessment

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Case Studies in chemical and Environmental engineering 2024年 10卷

作者： Wahyono, Yoyon Sasongko, Nugroho Adi Trench, Allan Anda, Martin Hadiyanto, Hadiyanto Aisyah, Nyayu Anisah, Anisah Ariyanto, Novy Kumalasari, Isnaeni Putri, Virny Zasyana Eka Lestari, Mutia Citrawati Panggabean, Lambas Parlaungan Ridlo, Rohmadi Sundari, Sundari Suryaningtyas, Anissa Dewi Novianti, Endah Dwi Hakim, Muhammad Raihan Farras Prihatin, Anggara Lomak Matin, Hashfi Hawali Abdul Research Center for Sustainable Production System and Life Cycle Assessment National Research and Innovation Agency - BRIN Prof. BJ. Habibie Complex Area Banten Tangerang Selatan 15314 Indonesia Energy Security Graduate Program Republic of Indonesia Defense University IPSC Sentul Area West Java 16810 Indonesia Centre for Exploration Targeting School of Earth Sciences The University of Western Australia 35 Stirling Highway Crawley 6009 WA Australia UWA Business School 35 Stirling Highway Crawley 6009 WA Australia Environmental Engineering Murdoch University Murdoch 6150 WA Australia Doctoral Program of Environmental Science School of Postgraduate Studies Diponegoro University Central Java Semarang 50241 Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Central Java Semarang 50275 Indonesia Department of Mechanical Engineering Vocational School Gadjah Mada University Sleman Yogyakarya 55281 Indonesia Study Program of Environmental Science Faculty of Mathematics and Natural Science Universitas Sebelas Maret Central Java Surakarta 57126 Indonesia

The critical minerals industries in Indonesia may pose possible environmental and human health risks due to the release of pollutants into soil, water, and air, as well as the use of materials and energy. This study investigates the possible environmental and human health impacts of Indonesia's nickel, gold, copper, tin, and bauxite mining and processing industries. This study utilizes the latest version of the OpenLCA software, version 2.0, in combination with the Ecoinvent 3.8 database. To evaluate potential environmental consequences and health effects on humans, CML-IA Baseline and Environmental Priority Strategies (EPS) are employed in product development. The EPS system was developed utilizing a hierarchical methodology with the objective of furnishing the product developer with data regarding the financial impact of human health impairment resulting from a particular product development. The production of one tonne of gold, nickel, bauxite, tin, and copper results in the emission of 7.34.E+07, 4.61.E+04, 3.10.E+04, 1.02.E+04, 8.01.E+03 kg CO₂ eq/t, respectively, contributing to global warming. This production is associated with asthma cases of 7.79.E+01 (gold industry), 2.21.E−03 (copper industry), 1.81.E−03 (tin industry), 9.21.E−04 (nickel industry), and 4.71.E−06 (bauxite industry) Personyears/t. Electricity consumption and the release of carbon dioxide are the main factors contributing to global warming. The primary cause of asthma cases is the utilization of fuel oil and electricity. Power plant chimneys can employ various technologies, such as cyclones, bag filters, and scrubbers, to mitigate the release of polluting gas emissions. The critical mineral industry must prioritize handling and governing of steam power facilities to minimize their negative effects on the environment and human health. © 2024 The Authors

关键词： Critical minerals industries Environmental impacts Human health impacts Life cycle assessment

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The effectiveness of domestic wastewater treatment in reducing BOD and COD levels: A literature review

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AIP Conference Proceedings 2023年第1期2683卷

作者： Yuli Handayani Syafrudin Syafrudin Suherman Suherman Master Program of Environmental Science School of Postgraduate Studies Universitas Diponegoro Semarang Indonesia Department of Environmental Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia

80% of the use of clean water by the community becomes wastewater which must be managed first before being discharged into surface water bodies not to cause disturbances to the water body environment, public health, and environmental aesthetics. This study examines the effectiveness of seven reactors for domestic wastewater treatment in reducing levels of Biochemical Oxygen Demand (BOD) and chemical Oxygen Demand (COD). These reactors are the Moving Bed Biofilter Reactor (MBBR) with kaldness media, only MBBR, filtration pipes, the addition of papaya seed bio coagulant, Up-flow Anaerobic Sludge Blanket (UASB), pipes filled with soil, and a combination of filtration and Anaerobic Baffled Reactor (ABR). This research was conducted with a descriptive method of literature review. The results showed that the reactors, respectively, reduced BOD levels by 83.3%; 78.9%; 15.75%; 93%; 36.9%; 76%; and 79%. They were able to reduce COD levels by 84.2%; 80.58%; 16.79%; 93%; 67.8%; 58%; and 68%. The addition of papaya seed bio coagulant is the most effective reactor to reduce BOD and COD because it contains tannin compounds that have effective clotting ability.

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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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Ship Propeller Rotation Threshold to Prevent Erosion and Sedimentation in Coastal Waters

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哈尔滨工程大学学报(英文版) 2024年第4期23卷 798-811页

作者： Abdul Kadir I.Istadi Agus Subagio I.Iskendar W.Waluyo Abdul Muis Dewi Kartikasari Siti Sadiah A.B Widagdo M.P Helios Mochammad Nasir N.Nurhadi Doctoral Program of Environmental Science School of Postgraduate StudiesUniversitas DiponegoroSemarangCentral Java 50275Indonesia Research Center for Transportation Technology National Research and Innovation Agency(BRIN)Jakarta 10340Indonesia Department of Chemical Engineering Faculty of EngineeringUniversitas DiponegoroSemarangCentral Java 50275Indonesia Department of Physics Faculty of Science and MathematicsUniversitas DiponegoroSemarangCentral Java 50275Indonesia Research Center for Hydrodynamic Technology National Research and Innovation Agency(BRIN)Jakarta 10340Indonesia Research Center for Energy Conversion and Conservation National Research and Innovation Agency(BRIN)Jakarta 10340Indonesia Directorate of Laboratory Management Research Facilitiesand Science and Technology ParkNational Research and Innovation Agency(BRIN)Jakarta 10340Indonesia

The rotation of a ship’s propeller can accelerate the water flow around it,which puts pressure on seabed *** pressure on the seabed can significantly trigger erosion and sedimentation of coastal *** the impact that can be caused,the ship’s propeller rotation limit needs to be determined to avoid damage to the aquatic *** research determines the threshold of ship propeller rotation based on the water flow velocity *** has been carried out at the Hydrodynamics Laboratory on several variations of propeller rotation R_(rmp)(r/min)and water depth using empirical approaches,numerical simulations,and scale model *** based on general standard criteria for erosion and sedimentation shows that a propeller with a diameter(D_(p))of 1.5 m is safe for propeller rotation at 25 r/min at all water ***,the propeller rotation of 75 r/min is safe for a distance between the propeller axis and the bottom of the water equal to D_(p).Meanwhile,rotation at 120 r/min is safe at a minimum distance of 1.5 D_(p),and 230 r/min is safe for a minimum distance of 2.0 D_(p).The propeller rotation threshold criteria are essential to determining the new under-keel clearance for environmentally friendly ship *** values vary based on seabed particle type and water depth.

关键词： Landing craft tank Water flow velocity Seabed erosion Under keel clearance

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Mechanical Characterization of Biostable Dental Restoratives and Adhesives

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Dental Materials 2025年 41卷 e36-e36页

作者： Gouveia, Z Finer, Y Santerre, P Faculty of Dentistry University of Toronto Toronto Canada Institute of Biomedical Engineering University of Toronto Toronto Canada Translational Biology and Engineering Program University of Toronto Toronto Canada Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Canada

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Photoluminescence of oxygen vacancy-rich nano-TiO2 photocatalyst for methylene blue color degradation

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Materials Science and engineering: B 2025年 320卷

作者： Simanjuntak, Mayer Made Joni, I. Faizal, Ferry Gultom, Noto Susanto Kuo, Dong-Hau Panatarani, Camellia Department of Physics Faculty of Mathematic and Natural Sciences Universitas Padjadjaran Jl. Raya Bandung-Sumedang KM 21 Jatinangor Sumedang45363 Indonesia Study Program of Biotechnology Faculty of Graduate School Universitas Padjadjaran Jl. Dipati Ukur No.35 Coblong Bandung40132 Indonesia Functional Nano Powder University Center of Excellence Universitas Padjadjaran Jl. Raya Bandung-Sumedang KM 21 Jatinangor Sumedang45363 Indonesia Department of Materials Science and Engineering National Taiwan University of Science and Technology No.43 Sec. 4 Keelung Road Taipei10607 Taiwan

Wastewater containing synthetic dyes poses a critical environmental hazard, necessitating the development of effective treatment techniques. Despite its promise as a photocatalyst, TiO2′s inability to efficiently absorb visible light limits its practical use. To overcome this limitation, oxygen vacancy (OV) engineering was carried out in TiO2 through solvothermal at temperatures of 150°C, 180°C, and 210°C. Comprehensive analyses confirmed a temperature-induced increase in crystallinity and OV concentration. Furthermore, photoluminescence analysis revealed mid-gap states that improve visible light absorption. Notably, the T150 sample achieved 93.43% degradation of methylene blue within 3 h under sunlight, outperforming commercial TiO2. The superior performance was attributed to a reduced bandgap energy, enhanced charge carrier separation, and increased generation of reactive oxygen species, all facilitated by an optimal concentration of OV. This study clarifies the interaction between photoluminescence and photocatalytic activity, highlighting OV engineering as a highly effective strategy for developing advanced TiO2-based materials for wastewater treatment. © 2025 Elsevier B.V.

关键词： Photocatalytic activity

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The effect of groove welding on mechanical properties and microstructure of wear resistance steel plate by Submerged Arc Welding 1

The effect of groove welding on mechanical properties and mi...

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1st International Symposium on Advances and Innovations in Mechanical engineering, ISAIME 2019

作者： Mansjur, Zuldesmi Sumual, Hendro M. Tamba, I.P. Mechanical Engineering Study Program Engineering Faculty Manado State University Indonesia Mechanical Engineering Education Department Engineering Faculty Manado State University Indonesia

Aim of this research is to analyze the mechanical properties and microstructure of wear resistance steel plates joined by Submerged Arc Welding at different grooves welding. The welding current of 300 Ampere, voltage of 28 Volt and travel speed of 38 cm/min was applied. The microscopical examination methods were used for weld zones. Impact toughness and rockwell hardness test were obtained from the weld metal, heat affected zone and the base metal samples. The fracture surfaces were examined by using optical microscope. As results, there was no difference of hardness and microstructure among three grooves welding. The significant differences were detected at the weld zones. Base metal had the highest hardness value. Ferrite and pearlite phases were obtained at three weld zones, but the heat affected zone had coarser grain structure than the base metal. Weld metal volume and electrode length significantly affected the impact toughness of joint, where the larger of the weld metal volume and length of electrode fill in the groove welding, the higher of impact toughness. The lowest impact energy and toughness value were attained at V groove and the highest was at I groove. The fracture surfaces at all groove welds showed ductile fracture dominantly. © Published under licence by IOP Publishing Ltd.

关键词： Fracture toughness

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Carbon Nanodots Synthesized from Used Tobacco Molasses as Promising Selective Probes for Fe (III) Ion Sensing

SSRN

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SSRN 2023年

作者： Sawalha, Shadi Assali, Mohyeddin Yaseen, Amal Ataya, Aya Refai, Leena Hamed, Rinad Misia, Giuseppe Collavini, Silvia Silvestri, Alessandro Chemical Engineering Program Faculty of Engineering and Information Technology An-Najah National University P.O. BOX 7 Nablus Palestine Department of Pharmacy Faculty of Medicine and Health Sciences An-Najah National University P.O.BOX 7 Nablus Palestine Department of Chemistry Faculty of Science An-Najah National University P.O. BOX 7 Nablus Palestine Department of Chemical and Pharmaceutical Sciences INSTM UdR Trieste University of Trieste Via Licio Giorgieri 1 Trieste34127 Italy Donostia-San Sebastián20014 Spain Department of Molecular Sciences and Nanosystems Ca' Foscari University of Venice Venezia30170 Italy

Carbon nanodots (CNDs) as an emerging and new class of nanomaterials have been widely used as sensing probes for metal cations based on fluorescence quenching. Several precursors have been utilized as starting materials for the synthesis of CNDs, either natural, artificial, or waste materials. Herein, we present a new precursor and cost-effective method to synthesize CNDs aligning with circular economy and green chemistry principles. Two classes of CNDs were obtained, starting from used (smoked) tobacco molasses, through two processes. First, extraction was directly carried out on molasses residue to isolate one class of CNDs, i.e. D-CNDs;then the residual solid was treated by chemical oxidation, yielding a different population of CNDs, named O-CNDs. Synthesized CNDs exhibited different properties in terms of size, functional groups, and optical properties. These features lead to different sensing abilities toward Fe3+ cation. O-CNDs showed better results in terms of sensitivity (0.0045 µM-1), limit of detection (LOD = 3.9 µM), and limit of quantification (LOQ = 13 µM) compared to D-CNDs (Sensitivity = 0.0029 µM-1, LOD = 7.2 µM, and LOQ = 24 µM). The quenching mechanism attained in both CNDs is due to a combined static-dynamic effect in which the static is the dominant component. Therefore, the synthesized O-CNDs could serve as promising and low-cost nanomaterials for selective sensing of Fe3+ cation in contaminated water. © 2023, The Authors. All rights reserved.

关键词： Sustainable chemistry

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