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25 results on '"Insoo Jung"'

1. Idle Vibration Reduction of a Diesel Sport Utility Vehicle

Author

Seokwon Ryu, Dongju Kim, Booyoung Lee, Doohee Han, Insoo Jung, and Jintai Chung

Subjects
diesel sport utility vehicle (SUV), idle vibration, multi-body dynamic model, vibration reduction, vibration absorber, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

This paper presents a study on the idle vibration reduction of a diesel sport utility vehicle (SUV). To reduce idle vibration, the transmission paths of vibration from the engine to the driver seat floor were investigated with the vehicle components related to idle vibration. Furthermore, operational deflection shape (ODS) tests were conducted to visualize the vibration shapes during engine idling. Experimental modal analyses were performed to obtain the natural frequencies and mode shapes. Through the ODS and modal tests, the vibration characteristics of the diesel SUV during idling were identified. Considering these vibration characteristics, a multi-body dynamic model for the diesel SUV described by differential equations of motion was established to evaluate the idle vibration. To implement the dynamic model effectively, the equivalent stiffnesses and damping coefficients included in the model were determined experimentally or analytically. The established dynamic model was verified by comparing the natural frequencies and idle vibration levels between simulations. Using this dynamic model, we analyzed the effects of various design variables on idle vibration and obtained an optimal design for reducing the idle vibration level. Finally, we present a design guide to reduce the idle vibration for diesel SUVs.

Published
2022
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7. Engine Sound Reduction and Enhancement Using Engine Vibration

Author

Insoo Jung, Hakjun Lee, Dongchul Lee, and Youngjin Park

Subjects
Vibration, Reduction (complexity), Noise, geography, geography.geographical_feature_category, Computer science, Acoustics, Noise control, Sound (geography)
Published
2020

10. Study on the Booming Noise of Front-wheel-drive Vehicle

Author

Insoo Jung and Doohee Han

Subjects
Noise, 020303 mechanical engineering & transports, 0203 mechanical engineering, Computer science, 020209 energy, Acoustics, 0202 electrical engineering, electronic engineering, information engineering, 02 engineering and technology, Front-wheel drive
Published
2018

14. Development of National e-Health Strategy

Author

JongSun Park, Misook Kwak, Byung-In Kim, Daegon Cho, Sung-Hong Kang, Youngmin Ki, Hee Hwang, Insoo Jung, Jieun Shin, and Young Myoung Ko

Subjects
Knowledge management, business.industry, Health care, Business
Published
2016

15. Development of the combustion noise index and control algorithm through signal processing of in-cylinder pressure for a diesel engine

Author

Dongchul Lee, Insoo Jung, and Jaemin Jin

Subjects
Combustion noise, 050210 logistics & transportation, Signal processing, Engineering, Control algorithm, Index (economics), Acoustics and Ultrasonics, business.industry, Applied Mathematics, 05 social sciences, Fast Fourier transform, 02 engineering and technology, Diesel engine, Cylinder pressure, Automotive engineering, Speech and Hearing, 020303 mechanical engineering & transports, Integrated engine pressure ratio, 0203 mechanical engineering, Control theory, 0502 economics and business, Signal Processing, business, Instrumentation
Published
2016

16. Geographic Distribution of Urologists in Korea, 2007 to 2012

Author

Young Myoung Ko, Soon Sun Kwon, Yun Seob Song, Hwa Yeon Sun, Sung Ryul Shim, Soo Hyun Song, Insoo Jung, and Jae Heon Kim

Subjects
Gerontology, Rural Population, Urology, Distribution (economics), Health Services Accessibility, Specialties, Surgical, Physicians, Republic of Korea, Urban Health Services, Medicine, Cities, Korea, Ecology, business.industry, Significant difference, Ecological study, Regression analysis, General Medicine, Metropolitan area, Manpower, Geographic distribution, National health insurance, Workforce, Original Article, Rural Health Services, Rural area, business, Demography
Abstract

The adequacy of the urologist work force in Korea has never been investigated. This study investigated the geographic distribution of urologists in Korea. County level data from the National Health Insurance Service and National Statistical Office was analyzed in this ecological study. Urologist density was defined by the number of urologists per 100,000 individuals. National patterns of urologist density were mapped graphically at the county level using GIS software. To control the time sequence, regression analysis with fitted line plot was conducted. The difference of distribution of urologist density was analyzed by ANCOVA. Urologists density showed an uneven distribution according to county characteristics (metropolitan cities vs. nonmetropolitan cities vs. rural areas; mean square=102.329, P

Published
2015

18. Study for the Radiated Noise from Engine Depending on Assembly Condition

Author

Insoo Jung, Taejin Shin, Jaemin Jin, and Sang Kwon Lee

Subjects
Noise, 020303 mechanical engineering & transports, 0203 mechanical engineering, Computer science, Acoustics, Electronic engineering, 020302 automobile design & engineering, 02 engineering and technology
Published
2017

21. Highly-conformal plasma-enhanced atomic-layer deposition silicon dioxide liner for high aspect-ratio through-silicon via 3D interconnections

Author

Gerald Beyer, Jeong-Jun Woo, Dimitrios Velenis, Eric Beyne, Yann Civale, Bart Swinnen, InSoo Jung, Julien Beynet, Augusto Redolfi, and Nancy Heylen

Subjects
Materials science, Through-silicon via, Silicon dioxide, business.industry, Flow (psychology), Process (computing), Conformal map, Nanotechnology, Plasma, chemistry.chemical_compound, Atomic layer deposition, chemistry, Optoelectronics, Thin film, business
Abstract

Increasing the TSV aspect ratio is a manufacturable approach to meet the requirements of high density 3D interconnections. A good control on the overall cost of ownership of the 3D interconnections clearly points towards the direction of highly conformal thin film deposition techniques for liner, barrier, and seed processing. The SiO 2 liner process, developed within ASM and implemented into imec 3D test vehicles, exhibits near-ideal conformality obtained for deposition temperature as low as 200oC. This is making this liner process a very versatile candidate for integration into via-middle process flow.

Published
2012

22. NVH Optimization of HMC 3.0L V6 Diesel Engine

Author

Woo-Hee Kwak, Dong-Kyu Yoo, Koo-Tae Kang, Insoo Jung, and Hyung-Shin Kim

Subjects
Computer science, Noise, vibration, and harshness, Diesel engine, Automotive engineering
Published
2007

23. Nickel oxalate nanostructures for supercapacitors

Author

Yongsug Tak, Insoo Jung, and Jinsub Choi

Subjects
inorganic chemicals, Materials science, Annealing (metallurgy), Nickel oxide, Oxalic acid, Thermal decomposition, Inorganic chemistry, chemistry.chemical_element, General Chemistry, Chemical reaction, Oxalate, chemistry.chemical_compound, Nickel, chemistry, otorhinolaryngologic diseases, Materials Chemistry, FOIL method
Abstract

Herein, we describe a facile method to produce nickel oxalate nanostructures by chemical reaction of oxalic acid and a nickel foil in various organic solvents and water. Grass-like structures consisting of nickel oxalate are produced by the chemical reaction within 30 min for all solvents. Interestingly, nickel oxalate nanowires can be produced by the addition of a small amount of water in certain solvents. Annealing of nickel oxalate structures leads to formation of nickel oxide structures with a slight morphological change. Compositions of the nanostructures are investigated by TEM and FT-IR analyses. In addition, the supercapacitance of the nickel oxalate nanostructures is characterized, and the results show that they are superior to that of nickel oxide nanostructures.

Published
2010

25. Nickel oxalate nanostructures for supercapacitorsElectronic supplementary information (ESI) available: Table S1: The mean areas of non-seeded regions denoted in Fig. 1. Fig. S1: Variation of pH associated with the addition of amounts of water to ethanolic 1 M oxalic acid. Fig. S2: Initial growth of nanowires prepared in ethanolic 1 M oxalic acid without water addition. Fig. S3: Enlarged view of Fig. 7, showing peaks in the range of 400–1000 cm−1. Fig. S4: Enlarged views of Fig. 8, showing double layer capacitance. See DOI: 10.1039/c0jm00279h

Author

Insoo Jung, Jinsub Choi, and Yongsug Tak

Abstract

Herein, we describe a facile method to produce nickel oxalate nanostructures by chemical reaction of oxalic acid and a nickel foil in various organic solvents and water. Grass-like structures consisting of nickel oxalate are produced by the chemical reaction within 30 min for all solvents. Interestingly, nickel oxalate nanowires can be produced by the addition of a small amount of water in certain solvents. Annealing of nickel oxalate structures leads to formation of nickel oxide structures with a slight morphological change. Compositions of the nanostructures are investigated by TEM and FT-IR analyses. In addition, the supercapacitance of the nickel oxalate nanostructures is characterized, and the results show that they are superior to that of nickel oxide nanostructures. [ABSTRACT FROM AUTHOR]

Published
2010
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