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3rd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2021

作者： Septiadi, Wayan Nata Marianti, Komang Manik Adi, Made Nara Pradipta Alim, Muhamad Rizkiantoro, Cheto Ramadhani, Dandi Dwipayana, Anak Agung Gde Agung Krisnanta Department of Mechanical Engineering Udayana University Bali Indonesia Bachelors Program in Mechanical Engineering Udayana University Bali Indonesia

ISBN: (纸本)9789811936289

The spread of the coronavirus has been the focus the world's attention. The government has issued a new regulation on the coronavirus that obligates the entire community to always wear a face mask and implement social distancing to prevent the spread of viruses. These issues have been impacted by an increase in the use of face masks throughout the world and in Indonesia. Moreover, the World Health Organization (WHO) suggested using medical face masks. Furthermore, in the health care sector, the possible loading of pathogens in sub-micrometer sizes and properties such as splash resistance and the ability to prevent infection by reducing the concentration of inhaled particulates has created limitations on the types of face masks that can be used. Therefore it is necessary to design a face mask sterilizer device that can extend the life span of masks, thereby decreasing the masks consumption. An investigation on mask sterilizer devices based on heat pipes and thermoelectrics was conducted in this study. The objective of this study was to investigate the thermal performance of the mask sterilizer device. The method used was an experimental method using variations in the input voltage on the thermoelectric, namely 9 V, 10 V, and 11 V, and the microcontroller was also adjusted to control the temperature by 70 ℃, 80 ℃, and 90 ℃. The results showed that the thermoelectrics can generate heat with a temperature difference between the hot side and the cold side that can reach 80.11 ℃. In terms of voltage, the greater voltage that was given led to a greater resulting temperature of the sterilization device and reduced the amount of time to achieve the minimum sterilization temperature. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Sterilization (cleaning)

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Hazmat Cooling Vest Temperature Using Heat Pipe and Thermoelectric 3rd

Hazmat Cooling Vest Temperature Using Heat Pipe and Thermoel...

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3rd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2021

作者： Septiadi, Wayan Nata Dwipayana, Anak Agung Gde Agung Krisnanta Marianti, Komang Manik Nugraha, I Ketut Arya Aditya Shantika, I Made Pujanu Ary Ananta, I Gede Riski Suarsana, I Komang Wahyu Fatmawati, Ni Nengah Dwi Sulistiowati, Ni Made Dian Putra, Nandy Department of Mechanical Engineering Udayana University Badung-Bali Indonesia Bachelors Program in Mechanical Engineering Udayana University Bali Indonesia Department of Microbiology Faculty of Medicine Udayana University Bali Indonesia Mental Health Nursing Department Faculty of Medicine Udayana University Bali Indonesia Department of Mechanical Engineering Universitas Indonesia Kampus Baru UI-Depok Indonesia

ISBN: (纸本)9789811936289

Corona Virus (COVID-19) is a virus that is endemic almost all over the world, including Indonesia. COVID-19 was first confirmed by the World Health Organization (WHO) on December 31, 2019, in Wuhan City, Hubei Province, China, and then rapidly expanded outside of China. To suppress the Covid-19 case, medical volunteers are needed as the main actors in efforts to handle Covid-19 patients. This makes health care facilities also need to focus on the principles of health worker safety, not only focus on the principles of patient safety. This also makes health care facilities also need to focus on the principles of health worker safety, not only focus on the principles of patient safety. The use of hazmat clothes is one of the efforts to protect health workers when in contact with Covid-19 patients. Hazmat clothes are technically referred to as "encapsulated waterproof protective clothing" which is PPE that must be used for officers from the risk of contracting the Covid-19 virus through airborne droplets and contact with patients and patient body fluids. Although hazmat clothing is an important PPE for health workers to stay protected, the use of hazmat clothing for a long time often makes medical personnel feel uncomfortable when providing services. Based on the problems above, the researchers conducted a study on the heat pipe - thermoelectric hazmat suit cooling vest. This technology can absorb more heat than other methods by simply applying the principle of capillarity to the wicks on the pipe walls. schematic of testing a cooling vest on a hazmat suit. The loading on the thermoelectric is given through the DC - Power supply. The temperature data read by the sensor will be detected by the computer system using the NI 9123 and C-DAQ 9174 modules. The test results can be viewed using the NI LabView 2017 software. The temperature used in this experiment is the result of tests carried out for 30 min. Based on the tests that have been carried out, the heat pipe-based the

关键词： Cooling

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Ergonomics analysis of electric motorcycles using an anthropometric approach method

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AIP Conference Proceedings 2024年第1期3053卷

作者： Wayan Nata Septiadi I. Gusti Ngurah Agung Ananta Mahaputra Komang Manik Marianti Anak Agung Gde Agung Krisnanta Dwipayana Krisnawan Tjokorda Gde Tirta Nandhia Cokorde Gede Indra Partha Department of Mechanical Engineering Udayana University Bali Indonesia bachelors program in Mechanical Engineering Udayana University Bali Indonesia

Electric motorcycles are one of the means of transportation of the future because they are environmentally friendly, high efficiency, and low in pollution. In Indonesia, it was revealed that 75% of accidents that occur involve 5 motorcycles. The cause of the accident occurs due to humans who experience weakness, where the fatigue can be caused by a motorcycle design that is less ergonomic, using an inappropriate motorcycle requires greater energy and causes fatigue and causes reduced concentration which ultimately leads to an accident. Ergonomics is a science that studies human beings that aims to produce a healthy, safe, and comfortable operational system. Based on this, researchers tried to analyze the ergonomics of electric motorcycles using 2 methods, namely the approach with a questionnaire and the anthropometric method, where the study used 24 student samples. The results of the questionnaire percentage, that the comfort level in the position of riding an electric motorcycle is quite comfortable, and the results of the anthropometric calculation of the data adequacy test stated N’ ≤ N, so the adequacy test of the data was declared sufficient.

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A performance investigation of the portable face mask sterilization device based on the heat pipe and thermoelectric

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AIP Conference Proceedings 2024年第1期2891卷

作者： Wayan Nata Septiadi Muhamad Alim Made Nara Pradipta Adi Cheto Rizkiantoro Dandi Ramadhani Komang Manik Marianti Anak Agung Gde Agung Krisnanta Dwipayana Department of Mechanical Engineering Udayana University Bali Indonesia 80361 Bachelors Program in Mechanical Engineering Udayana University Bali Indonesia 80361

The emergence of coronaviruses has surged the demand for face masks, preventing the virus transmission that spreads and causes damage to the human respiratory system. This situation leads to increased face mask waste in the environment. To overcome this issue, the sterilization of face masks can be a solution to reduce face mask waste and enhance the usage time of the face mask by improving its quality. In this study, the portable face mask sterilization using the heat pipe and thermoelectric was designed and investigated through an experimental method. This study aimed to assess this sterilization device’s ability to sterilize the face mask. The face mask was sterilized for 30 minutes at three different temperature settings to obtain the proper temperature setting. Thereby, the temperature settings can be set at 70 °C, 80 °C, and 90 °C. In addition, another investigation of the bacterial colony count method using Escherichia Coli was also conducted to ascertain the capability of the proposed device to deprive the microorganisms on the masks. The results showed that the sterilization device could effectively sterilize the face mask when the chamber surface temperature was set at 90°C, whereby the face mask temperature was 82.71°C. This condition can effectively destroy the bacteria on the face mask surface from 10 to 30 minutes.

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PRESIDENT'S PAGE

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Naval Engineers Journal 2009年第6期109卷

作者： Joseph F. Yurso President Joseph F. Yurso:is currently director of technical development for Q.E.D. Systems Inc. He received a Bachelors of Science in mechanical engineering from The Pennsylvania State University and an Masters of Science in mechanical engineering from the Naval Postgraduate School. He also completed a special management program at Carnegie Mellon University. Prior to entering the Navy as an engineering duty officer Mr. Yurso was a refrigeration and air conditioning engineer for the Bureau of Ships. His Navy experience includes engineer officer of a combatant ship submarine type desk quality assurance officer and production officer in naval shipyards and planning officer quality assurance officer and deputy supervisor in Supervisor of Shipbuilding offices. His two command tours were as Supervisor of Shipbuilding Groton Connecticut (1980-81) and Shipyard Commander Portsmouth Naval Shipyard Kittery Maine (1981-84). He was awarded the Legion of Merit for both of these tours. Mr. Yurso has been a member of ASNE since 1964. He is a life member and a sustaining member of the Society. He has been active in several Sections including Charleston Northern and Southern New England and Tidewater. He is a former chairman of the Tidewater Section and was the chairman of the ASNE Fleet Maintenance Symposium in 1991. He served as Council vice president from 1993 to 1996 and as a member of Council for six years. He was a contributing author to the Society's first edition of Naval Engineering and American Sea Power. In 1993 he was awarded the Frank G. Law Award for his dedication and longtime service to the Society. Mr. Yurso maintains memberships in other societies including the American Society of Mechanical Engineers Sigma Xi the American Society for Quality Control Naval Institute and Tidewater Association of Service Contractors. He has held registered professional engineer status in two states and is listed inWho's Who in Science and Engineering.

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Applying fuzzy functions and sequential coordination to optimization of machinery arrangement and pipe routing

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NAVAL ENGINEERS JOURNAL 1998年第6期110卷 43-54页

作者： Wu, BC Young, GS Schmidt, W Choppella, K Dr. Bi-Chu Wu:received a PhD in Mechanical Engineering from the University of Maryland College Park in 1991. She has worked on projects involving naval architecture design optimization solid mechanics and database development. Presently a senwr engineer with Angle Incorporated Dr Wu's research interests are in design optimization and fuzzy logic applications. Dr. Gin-Shu Young: a senior engineer with Angle Incorporated holds a PhD in Mechanical Engineering from the University of Maryland College Park. As a guest researcher with National Institute of Standards and Technologies from 1990 to 1993 he worked on vision-based navigation for autonomous vehicles. His experience also includes applications of optimization fuzzy logic neural network and genetic algorithm methods to engineering system design Mr. William Schmidt:co-founded Angle Incorporated in 1990 and has served as Vice PresidentlChiefScientist during this tame. He holds a B.Sc. in Applied Science from the Naval Acadt?my and an M.Sc. in Physics from the Naval Post Graduate School. He has cner 20 years experience in technical leadership material and personnel management. He has led the application of computer aided design (CAD) and Product Model Information Exchange to the shipbuilding industry. His experience also includes leading the amlication of model based operational analysis to support the Live Fire Test Program for DDG 51 Class Destroyers. Mr. Krishna M. Choppella:is a Sofware Engineer at Eidea Laboratories Incotporated where he works on componentbased distributed enterpvise frameworks. He has been involved in creating data analysis tools for the US Nay by integrating CAD modeis databases and graphical front ends. His work in the Masters degree program in Mechanical Engineering at the University of Texas at Austin was in di0ddase.r spectroscopy of combustion products in porous-matri burners. He received his Bachelors degree in Electrical Engineering in India. He was a Research Associate at the Centre for Laser Technology and Project Engi

Ship design is often multidisciplinary involving several design elements with various types of objectives and constraints (O/C) some easily described as mathematical formulas, others better modeled as descriptive assertions. This paper describes a method based on fuzzy functions and an integrated performance index to model O/C using descriptive assertions to be used with mathematical formulas in optimization. Another issue addressed in this paper concerns the coordination of design elements when sequentially coupled, that is, when one leads the other and the performance of the follower depends greatly on the design of the leader. Based on neuro-fuzzy techniques, the method described here coordinates and optimizes sequentially coupled elements. The two methods are applied to machinery arrangement (MA) and pipe routing (PR). Preliminary models for optimization of MA and PR are described considering convenience, producibility: engine room size, interference and location as factors in the O/C set. Some test results from MA/PR applications are presented and discussed. The methods are generic and can be extended to other elements in ship design. They are mutually independent and may be used separately Two advantages of their use are an improvement in overall performance and a reduction in the need for redesign of elements.

关键词： Optimization

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USING VIRTUAL ENVIRONMENTS IN THE DESIGN OF SHIPS

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NAVAL ENGINEERS JOURNAL 1994年第3期106卷 91-106页

作者： JONS, OP RYAN, JC JONES, GW Otto P. Jons:received a Diplom Ing. in shipbuilding from the Technical University of Hanover W. Germany and an MS in naval architecture and marine engineering from MIT. He then joined Litton Ship Systems where he was responsible for the preliminary design of the DD-963 hull structure and then for ship system integration as manager LHA ship systems engineering department. From 1972 to 1974 he was the principal research scientist at Hydronautics. In 1974 as technical director he helped establish the Crystal City office of Designers and Planners. Mr. Jons was one of the co-founders of Advanced Marine Enterprises Inc. in 1976 where he serves as corporate vice president engineering. J. Christopher Ryan:earned his bachelors and masters degrees in naval architecture from Webb Institute and MIT respectively. He spent three years at the advanced marine technology division of Litton Industries working on the DD-963 class ship design and related computer aided design projects. He subsequently went to the Navy Department concentrating on early stage design of surface combatants for twelve years including work on the FFG-7 Sea Control Ship CSGN and CVV aircraft carrier projects. He then shifted focus and became the Technical Director for the Computer Supported Design Program in NavSea for five years. Mr. Ryan has served in several supervisory positions within the Ship Design Group in NavSea since that time. He is currently the director of the future ship concepts division. Gary W. Jones:graduated from the University of Tennessee in 1971 with a BS in mechanical engineering and followed up with graduate work at George Washington University and the University of Maryland. Mr. Jones was with the Naval Sea Systems Command from 1971 until 1988 where he was a naval architect in the submarine section of the hull form design division. In 1988 he was detailed to the Defense Advanced Research Projects Agency (DARPA) where he became the program manager for the advanced submarine technology program's hydrodynamic hydroac

A major contributor to the expense and length of time to design, build, and test new systems has been the need to build and test hardware prototypes to determine their effectiveness in meeting operational requirements. Recent and dramatic advances in computer simulation technologies hold forth the promise of revolutionizing design and acquisition strategies by providing the means to validate end users' requirements prior to hardware construction. By designing and operationally testing virtual prototypes in a virtual environment, these technologies will soon offer naval architects the ability to build and launch ships in computer-based cyberspace in lieu of the shipbuilder's ways. The authors of this paper provide the background for these developments, explore the significance and ramifications of these technologies to the current process of ship and system design, outline challenges lying ahead, and present their vision and recommendations for future development.

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