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A Particle Detection Modeling of Non-contact Coplanar Differential Impedance Sensor in Microfluidic System

Journal of Physics: Conference Series 2018年第1期1144卷

作者： K Masaen J Sanglao P Chimsiri R Techapiesancharoenkij N Pussadee Master's Degree Program in Physics Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand Department of Materials Engineering Faculty of Engineering Kasetsart University Bangkok 10900 Thailand Thailand Center of Excellence in Physics Commission on Higher Education 328 Si Ayutthaya Road Bangkok 10400 Thailand Plasma and Beam Physics Research Facility Department of Physics and Materials Science Chiang Mai University Chiang Mai 50200 Thailand Research Center in Physics and Astronomy Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand

Over the last few years, study of microfluidic flow cytometry using electrical signals has developed at a fast pace. There are several electrical detection congurations but differential impedance sensing offers a greater advantage due to its capability of cancelling common noise from the detected signal, resulting in improved signal to noise ratio. This paper presents the simulation of a differential impedance sensor by employing the finite element method to gain an insight and to find the proper range of the working excitation frequency for the detection system. A polystyrene microbead was used as a model particle flowing past the detection area that had non-contact excitation and two pickup coplanar electrodes in which an excitation electrode was positioned between the two pickup electrodes. The modeling results showed that for a 2 μm PDMS separation layer, the range of optimal excitation frequency was about 100 - 1000 Hz when DI water was a background medium. The bead size to microchannel height ratio was found to affect the sensitivity of detection, in which the closer the height ratio was to the unity ratio, the more current was detected. The results of the simulation study will be used in fabricating an actual device for microfluidic particle cytometry applications.

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Application of free surface synthetic schlieren method in determining surface tension from a light floating object

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Journal of Physics: Conference Series 2019年第1期1380卷

作者： C Pathommapas S Yapo E Seesomboon N Pussadee Master's Degree Program in Teaching Physics Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand Science Department Udomdarunee School Sukhothai 52000 Thailand Department of Mechanical Engineering Faculty of Engineering Chiang Mai University Chiang Mai 50200 Thailand Plasma and Beam Physics Research Facility Department of Physics and Materials Science Chiang Mai University Chiang Mai 50200 Thailand Thailand Center of Excellence in physics Commission on Higher Education 328 Si Ayutthaya Road Bangkok 10400 Thailand

Free surface synthetic schlieren (FS-SS) is a liquid surface topography visualization technique relying on apparent dot pattern displacement due to liquid surface deformation. It has gained attention in the fluid visualization field due to its relatively simple and inexpensive setup. One of the most powerful features of the FS-SS technique is the 3D topography of deformed liquid surface, in which submillimeter scale changes can be readily observed in great detail. The visualization of liquid meniscus at the solid interface is proposed in this study to calculate surface tension by equating the surface tension force with weight of light, floating object with circular geometry. It was found that surface tensions of liquids are much greater than anticipated, suggesting that the effect of buoyant force of displaced liquid due to deformed interface cannot be neglected. When the buoyant force is included, the calculated surface tension of liquids are within 10% of the reference values.

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Surface Water Wave Topography Construction using Free Surface Synthetic Schlieren Method for Demonstration of Ripple Tank Wave Phenomena

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Journal of Physics: Conference Series 2018年第1期1144卷

作者： S Yapo E Seesomboon N Chattrapiban N Pussadee Master's Degree Program in Teaching Physics Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand Department of Mechanical Engineering Faculty of Engineering Chiang Mai University Chiang Mai 50200 Thailand Department of Physics and Materials Science Chiang Mai University Chiang Mai 50200 Thailand Thailand Center of Excellence in Physics Commission on Higher Education 328 Si Ayutthaya Road Bangkok 10400 Thailand Research Center in Physics and Astronomy Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand

The ripple tank is a popular water wave phenomena demonstration tool for secondary school students. The projected wave images are observed in bright - dark patterns on a screen. This tool, however, falls short in presenting the amplitude of the waves which is another important parameter in explaining the wave phenomena. The free surface synthetic schlieren (FS-SS) method presents an immense technical tool for solving this problem. FS-SS is an optical method based on light refraction in determining the surface gradient field from the motion of a random dot pattern when the water surface is perturbed. The surface height of the wave is constructed using the inverse gradient operation on the displacement gradient field of the random dot pattern. In this work, Wave propagation, reflection, diffraction, and interference pattern surface construction were performed to visualize wave phenomena in 3D.

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Application of nanocatalyst iron oxide (Fe2O3) to reduce exhaust emissions (CO and HC)

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IOP Conference Series: materials science and engineering 2018年第1期432卷

作者： P Puspitasari C Yazirin L A Bachtiar J W Dika SM S N S Zaharis Mechanical Engineering Department Engineering Faculty Malang State University Semarang street 5 Malang East Java Indonesia Center of Nano Research and Advanced Materials Malang State University Semarang street 5 Malang East Java Indonesia Master Program of Mechanical Engineering Engineering Faculty Malang State University Semarang street 5 Malang East Java Indonesia Bachelor Program Mechanical Engineering Department Malang State University Semarang street 5 Malang East Java Indonesia Industrial Chemical Technology Programme Faculty of Science and Technology Universiti Sains Islam Malaysia Bandar Baru Nilai 71800 Nilai Negeri Sembilan

Fe2O3 has been the interest of many studies due to its applications in various scientific and industrial fields including in environment, corrosion, soil science, and exhaust emissions. Fe2O3 is a chemical mixture that can be applied as a catalyst to reduce exhaust emissions because it is capable of binding CO and HC contained in motorcycle exhaust gases The growth of motor vehicles results in air pollution and an increase in exhaust emissions consisting of 70.50% CO and 18.34% HC. One effort to reduce exhaust emission levels is by applying a catalytic converter to the exhaust system. This research was an experimental research aiming to investigate the difference in emission level of CO and HC between a motorcycle with and without a catalytic converter. The types of fuel used were RON 88, RON 90, RON 92, and RON 98. The results showed that the application of Fe2O3 as a catalyst could reduce the level of CO significantly in RON 88, i.e. 91.43% CO, and the level of HC in RON 88 and RON 92, i.e. 53.27% and 91.07% HC respectively.

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materials for hydrofoils

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Naval Engineers Journal 1963年第n 3期v 75卷 p609-622页

作者： Fioriti, I. Vasta, J. Starr, A. Mr. Fioriti is the Materials Engineer in the Hull Scientific and Research Section Bureau of Ships with responsibility for materials and fabrication processes that are used in the construction of ship hulls. Mr. Fioriti attended the University of Pittsburgh receiving the Bachelor of Science degree in Metallurgical Engineering in 1951. He took postgraduate work at the University of Maryland receiving the Master of Science degree in 1960. From 1951 to 1956 he worked in the Metals and Metallurgy Section of the Bureau of Ships where he planned and administered research programs on metals for ships. He was associated intimately with the development of HY-80 steel and prepared the first specification used for its procurement by the Navy. In addition he was responsible for the development of dimpled armor plate for aircraft carrier flight decks. In 1956 he assumed his present position where he has been active in the Ship Structure Committee research program the low cycle fatigue structural program and the hydrofoil materials research program. Mr. Vasta is the Head of Hull Scientific and Research Section Bureau of Ships with responsibility for planning initiating and technically monitoring research in the fields of structural mechanics and hydromechanics. Mr. Vasta attended New York University receiving the Bachelor of Science degree in Mechanical Engineering in 1930. He took postgraduate work at the Massachusetts Institute of Technology receiving the Master of Science degree in 1931. From 1931 to 1938 he worked at the United States Experimental Model Basin in the structural mechanics group. After a short duty at the Headquarters of the United States Coast Guard he joined in 1939 the staff of the United States Maritime Commission where he held various positions of responsibility in the Technical Division. He was associated intimately with the design development of the reinforced concrete ship program first as Assistant Chief and then as the Chief of the Section. Thereafter he was appointed Assistant Chief of

Research program of U S Bureau of Ships is in final phase;literature survey and screening phases are completed;on basis of tests, fabrication studies and cost analyses most promising materials are steels 4330M and 17-4PH (H1025) with protective coatings, and 2 titanium alloys (8AL-2CB-1TA) and (6AL-4V);most promising coatings are polyurethane rubber and neoprene rubber base coatings;coated HY-100 steel is satisfactory for low performance foils;glass laminates are of particular interest as foil materials and are under study;no "off shelf" material is ideal for high speed foils.

关键词： Hydrofoils

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Correction: Advancements in additive manufacturing for video laryngoscopes: a comprehensive scoping and technological review

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Systematic reviews 2024年第1期13卷 31页

作者： Ana Cristina Beitia Kraemer Moraes Chiara das Dores do Nascimento Everton Granemann Souza Mauricio Beitia Kraemer Mauricio Moraes Neftali Lenin Villarreal Carreno Evandro Piva Rafael Guerra Lund Pelotas Dental School Graduate Program in Dentistry Federal University of Pelotas Pelotas RS 96010‑560 Brazil. Master's Degree in Electronic and Computer Engineering Center for Social and Technological Sciences Catholic University of Pelotas Pelotas RS 96015‑560 Brazil. Faculty of Medicine São Francisco University Bragança Paulista SP 12916‑900 Brazil. Faculty of Medicine Federal University of Pelotas Pelotas RS 96010‑560 Brazil. Graduate Program in Materials Science and Engineering Technological Development Center Federal University of Pelotas Pelotas RS 96010‑610 Brazil. Pelotas Dental School Graduate Program in Dentistry Federal University of Pelotas Pelotas RS 96010‑560 Brazil. rafael.lund@***. Graduate Program in Materials Science and Engineering Technological Development Center Federal University of Pelotas Pelotas RS 96010‑610 Brazil. rafael.lund@***.

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Fabrication of SiN films at low temperature by RF biased coaxial-line microwave plasma CVD

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第11期79卷 58-65页

作者： Morita, Y Kato, I Nakajima, T School of Science and Engineering Waseda University Tokyo Japan Received a B.S. in 1992 from the Department of Electronics and Communication Waseda University. He is now enrolled in the Ph.D. program at the same university. He has been involved in research on microwave plasma CVD. He is a member of the Japanese Society of Applied Physics. Received the B.S. and Ph.D. degrees from the Department of Electronics and Communication Waseda University in 1967 and 1973 respectively. In 1973 he joined the faculty of Waseda University becoming an associate professor in 1978. He was Visiting Professor at Manitoba University Canada in 1979–1981. He has supervised research and participated in joint research with die Canadian National Research Council. He became a professor at Waseda University in 1993. He has been involved in research on microwave plasma CVD photonics lasers electronic materials evaluation technologies photonic materials opto-quantum electronics and semiconductor dun films. He is a member of die IEE of Japan die Japan Society of Applied Physics die TV Society die Japanese Vacuum Society and IEEE. Received die B.S. from die Department of Electronics and Communication Waseda University in 1994. He is now enrolled in die master's program at die same university. He has been involved in research on microwave plasma CVD. He is a member of die Japan Society of Applied Physics.

This paper discusses the influence of ion bombardment on the characteristics of SiN films. In this study, the double-tube coaxial-line microwave plasma CVD system, which is suitable for the investigation of ion bombardment, is used to deposit SiN films. The ion bombardment energy is varied by varying the RF bias at constant ion density, As the RF bias is increased, the film density increases and the hydrogen concentration decreases, but the dangling bond density increases. The increase in the film density and decrease of hydrogen concentration are caused by the increase in film surface temperature, while the increase of the dangling bond density is caused by bond breakage due to the N+ ion implantation. When the substrate temperature is 200 degrees C and the RF bias is -175 V, the film density is 3 g/cm(3) and the hydrogen concentration is 9 at.% because of the film surface heating effect of ion bombardment acid also due to substrate heating. Substrate heating at 200 degrees C suppresses the increase in the dangling bond density. It is also demonstrated that the film surface temperature is about 200 degrees C when RF bias is -70 similar to-80 V and the substrate is unheated by any heater.

关键词： microwave plasma CVD SiN film RF bias ion bombardment effect film surface hearing effect

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AN EVALUATION OF HY‐80 STEEL. AS A STRUCTURAL MATERIAL FOR SUBMARINES. PART II

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Naval Engineers Journal 1965年第2期77卷 193-200页

作者： HELLER, S.R. FIORITI, IVO VASTA, JOHN Captain Heller an Engineering Duty Officer of the United States Navy received his undergraduate education at the University of Michigan in Naval Architecture and Marine Engineering and in Mathematics. Following typical shipyard duty during World War II he received postgraduate instruction at the Massachusetts Institute of Technology leading to the degrees of Naval Engineer and Doctor of Science in Naval Architecture. Since then he has had design responsibilities in the Bureau of Ships had a maintenance assignment with the Fleet directed structural research at the David Taylor Model Basin engaged in submarine design and construction at Portsmouth Naval Shipyard and is now Head of Hull Design in the Bureau of Ships. Captain Heller is a member of ASNE SNAME Tau Beta Pi and Sigma Xi. Mr. Fioriti is the Materials Engineer in the Hull Scientific and Research Section Bureau of Ships with responsibility for materials and fabrication processes that are used in the construction of ship hulls. Mr. Fioriti attended the University of Pittsburgh receiving the Bachelor of Science degree in Metallurgical Engineering in 1951. He took postgraduate work at the University of Maryland receiving the Master of Science degree in 1960. From 1951 to 1956 he worked in the Metals and Metallurgy Section of the Bureau of Ships where he planned and administered research programs on metals for ships. He was associated intimately with the development of HY-80 steel and prepared the first specification used for its procurement by the Navy. In addition he was responsible for the development of dimpled armor plate for aircraft carrier flight decks. In 1956 he assumed his present position where he has been active in the Ship Structure Committee research program the low cycle fatigue structural program and the hydrofoil materials research program. Mr. Vasta is Head of Hull Scientific and Research Section Bureau of Ships with the responsibility for planning initiating and technically monitoring research in the fields of structural me

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MARINE APPLICATIONS OF PLASTICS

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Journal of the American Society for Naval Engineers 1960年第4期72卷 609-622页

作者： OWEN, T.B. ALFERS, J.B. USN Captain Owen was commissioned in the Navy in 1940 upon graduation from the University of Washington where he received a Bachelor of Science degree in Chemical Engineering. After four years of service afloat during World War II and a brief tour in the Bureau of Naval Personnel he participated in the Navy officers' postgraduate training program. In 1950 he received the degree of Doctor of Philosophy in Physical Chemistry at Cornell University. After a year's work at the University of Amsterdam he was designated as an Engineering Duty Officer. He then returned to the United States for duty in the Naval Sciences Division of the Office of Naval Research. He was then transferred to the Long Beach Naval Shipyard where he served successively as Assistant Repair Superintendent and Production Control Superintendent. At the conclusion of this tour he was assigned to the Bureau of Ships as Head of the Materials Development Branch. He is now Director Applied Science Division of the Bureau. Captain Owen holds the Silver Star Medal Bronze Star Medal the Navy Unit Commendation and other area service awards. He is a member of the American Chemical Society Tau Beta Pi and Sigma Xi. Mr. Alfers graduated from Kansas State University with a degree in Electrical Engineering. He worked for several years with the Rural Electrification Administration on operation and maintenance of Rural Electric distribution systems. For the past 18 years he has worked in research and development and standardization of plastic and dielectric materials for the Bureau of Ships. At the present time he is Acting Head of the Section for Polymers Fibers and Packaging of the Material Development Branch. Mr. Alfers recently received a Master's degree in Engineering Administration from George Washington University. He has received the Distinguished Civilian Service Award from the Secretary of the Navy and the Executive Award from the Reinforced Plastics Division of the Society of the Plastics Industry. He is a member of the Society of Plastic Enginee

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