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전재한(Jaehan Jeon),최아라(Ara Choi),박성훈(Sunghoon Park),정태영(Taeyoung Chung) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
As an autonomous driving technology is the future of on-road driving, an unmanned valet parking system is one of a key technology to realize door to door autonomous vehicle. When an autonomous vehicle arrive its destination, the driver steps out of the car and pushes button on the smart phone, and then the vehicle autonomously parking in without any anxiety of user. Similarly, the vehicle gets out from the parking lot at right time and right position for user. We mainly focused on a vehicle actuator control, path following control for parking slot detection, parking maneuver control with shift-by-wire system, and smart phone interface between the user and vehicle. As the localization technology of a vehicle at the indoor or outdoor parking areas is most important and difficult problem, we applied precise position information from the DGPS for preliminary implementation of the system.
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초음파 센서를 이용한 차량 주차공간 탐색에서의 연석 감지 알고리즘
김수용(Suyong Kim),이동욱(Dongwook Lee),박성훈(Sunghoon Park),권재희(Jaehee Kwon) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Recently many automobile companies are developing parking assist system as it improves the convenience of drivers. Among several types of parking assistance system, the method using ultrasonic sensors for detecting parking space is widely used because of its low cost and usefulness. In order to detect the parking space, the parking space detection algorithm provides the width and the length of the parking space using long range ultrasonic sensor. In this paper, to detect the accurate parking space with the curbstone, the curbstone detection algorithm is proposed. The performances of the proposed algorithm are verified and evaluated by experiments.
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In Vitro Antimicrobial Susceptibility of <i>Mycobacterium abscessus</i> in Korea
Park, Sunghoon,Kim, Shinok,Park, Eun Mi,Kim, Hojoong,Kwon, O Jung,Chang, Chulhun L.,Lew, Woo Jin,Park, Young Kil,Koh, Won-Jung The Korean Academy of Medical Sciences 2008 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.23 No.1
<P><I>Mycobacterium abscessus</I> is the second most common etiology of pulmonary disease caused by nontuberculous mycobacteria in Korea. Although antimicrobial susceptibility tests are important for appropriate patient management in <I>M. abscessus</I> lung disease, the tests have never been investigated in Korea. Seventy-four isolates of <I>M. abscessus</I> recovered from patient respiratory samples were tested against eight antimicrobial agents following the guidelines set forth by the National Committee for Clinical Laboratory Standards. Of the parenteral antibiotics, amikacin (99%, 73/74) and cefoxitin (99%, 73/74) were active against most isolates. Imipenem (55%, 36/66) and tobramycin (36%, 27/74) had activity against moderate number of isolates. Of the oral antibiotics, clarithromycin (91%, 67/74) was active against the majority of isolates. Moxifloxacin (73%, 54/74) and ciprofloxacin (57%, 42/74) had activity against a moderate number of isolates. Doxycycline was the least active, inhibiting only 7% (5/74) of isolates. In conclusion, the variations in susceptibility within <I>M. abscessus</I> isolates to currently available antimicrobials suggest that the antimicrobial susceptibilities of any clinically significant <I>M. abscessus</I> isolate be needed individually.</P>
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A Multicenter Study of Pertussis Infection in Adults with Coughing in Korea: PCR-Based Study
Park, Sunghoon,Lee, Myung-Gu,Lee, Kwan Ho,Park, Yong Bum,Yoo, Kwang Ha,Park, Jeong-Woong,Kim, Changhwan,Lee, Yong Chul,Park, Jae Seuk,Kwon, Yong Soo,Seo, Ki-Hyun,Kim, Hui Jung,Kwak, Seung Min,Kim, Ju- The Korean Academy of Tuberculosis and Respiratory 2012 Tuberculosis and Respiratory Diseases Vol.73 No.5
Background: Limited data on the incidence and clinical characteristics of adult pertussis infections are available in Korea. Methods: Thirty-one hospitals and the Korean Centers for Disease Control and Prevention collaborated to investigate the incidence and clinical characteristics of pertussis infections among adults with a bothersome cough in non-outbreak, ordinary outpatient settings. Nasopharyngeal aspirates or nasopharyngeal swabs were collected for polymerase chain reaction (PCR) and culture tests. Results: The study enrolled 934 patients between September 2009 and April 2011. Five patients were diagnosed as confirmed cases, satisfying both clinical and laboratory criteria (five positive PCR and one concurrent positive culture). Among 607 patients with cough duration of at least 2 weeks, 504 satisfied the clinical criteria of the US Centers for Disease Control and Prevention (i.e., probable case). The clinical pertussis cases (i.e., both probable and confirmed cases) had a wide age distribution ($45.7{\pm}15.5$ years) and cough duration (median, 30 days; interquartile range, 18.0~50.0 days). In addition, sputum, rhinorrhea, and myalgia were less common and dyspnea was more common in the clinical cases, compared to the others (p=0.037, p=0.006, p=0.005, and p=0.030, respectively). Conclusion: The positive rate of pertussis infection may be low in non-outbreak, ordinary clinical settings if a PCR-based method is used. However, further prospective, well-designed, multicenter studies are needed.
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Park, Sunghoon,Kim, Hyunsu,Jin, Changhyun,Lee, Chongmu Springer 2011 NANOSCALE RESEARCH LETTERS Vol.6 No.1
<P>Photoluminescence measurements showed that needle-like tungsten oxide nanostructures synthesized at 590°C to 750°C by the thermal evaporation of WO<SUB>3 </SUB>nanopowders without the use of a catalyst had an intense near-ultraviolet (NUV) emission band that was different from that of the tungsten oxide nanostructures obtained in other temperature ranges. The intense NUV emission might be due to the localized states associated with oxygen vacancies and surface states.</P>
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Sunghoon Park, M.D., Ph.D.,Youjin Chang, M.D., Ph.D.,Moon Seong Baek, M.D., Ph.D.,Sei Won Kim, M.D., Ph.D.,Su Hwan Lee, M.D., Ph.D.,Jung Soo Kim, M.D.,So Young Park, M.D., Ph.D.,Jin Woo Kim, M.D., Ph. 대한결핵및호흡기학회 2025 Tuberculosis and Respiratory Diseases Vol.88 No.2
High-flow nasal cannula (HFNC) is a noninvasive respiratory support system that deliversair that is heated at 31°C−38°C, humidified 100%, and oxygen-enriched at a constanthigh flow rate of 15−60 L/min. Because of its numerous physiological benefits,convenience, and minimal side effects, HFNC has been increasingly used over the pastdecade in patients with acute hypoxemic respiratory failure, yet the clinical benefits oflong-term HFNC remain uncertain. Several studies have suggested its potential useas an alternative home oxygen therapy for patients with chronic stable lung diseases,such as chronic obstructive pulmonary disease (COPD), interstitial lung disease, andbronchiectasis. The use of long-term home HFNC in patients with chronic respiratoryfailure is an emerging area with promising potential. Despite limited clinical research,this review aims to describe the physiology of HFNC use and summarize the currentevidence on its long-term application, to provide healthcare providers with insights andperspectives on the potential role of long-term home HFNC.
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Acetone Sensing with In<sub>2</sub>O<sub>3</sub>-Coated Nb<sub>2</sub>O<sub>5</sub> Nanorod Sensors
Park, Sunghoon,Kim, Soohyun,Jung, Jihwan,Lee, Chongmu American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.3
<P>Nb2O5-core/In2O3-shell nanorods were synthesized by thermal oxidation of Nb foil followed by sputter deposition of In2O3. The 1D nanostructures exhibited a rod-like morphology with widths and lengths ranging from 20 to 70 nm and 10 to 20 mu m, respectively. The sensing properties of Nb2O5 - core/In2O3-shell nanorod sensors toward acetone gas were examined. The pristine Nb2O5 nanorods showed responses ranging from similar to 121 to similar to 253% to CH3COCH3 concentrations of 200-1,000 ppm. In contrast, Nb2O5-core/In2O3-shell nanorods showed responses ranging from similar to 167 to similar to 563% over the same concentration range. These responses are comparable or superior to other metal oxide semiconductor gas sensors in the literature. The underlying mechanism of the enhanced sensing properties of Nb2O5-core/In2O3-shell nanorods toward CH3COCH3 is also discussed.</P>
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