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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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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.
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>
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.
MassNet: a functional annotation service for protein mass spectrometry data
Park, Daeui,Kim, Byoung-Chul,Cho, Seong-Woong,Park, Seong-Jin,Choi, Jong-Soon,Kim, Seung Il,Bhak, Jong,Lee, Sunghoon Oxford University Press 2008 Nucleic acids research Vol.36 No.suppl2
<P>Although mass spectrometry has been frequently used to identify proteins, there are no web servers that provide comprehensive functional annotation of those identified proteins. It is necessary to provide such web service due to a rapid increase in the data. We, therefore, introduce MassNet, which provides (i) physico-chemical analysis information, (ii) KEGG pathway assignment (iii) Gene Ontology mapping and (iv) protein–protein interaction (PPI) prediction for the data from MASCOT, Prospector and Profound. MassNet provides the prediction information for PPIs using both 3D structural interaction and experimental interaction deposited in PSIMAP, BIND, DIP, HPRD, IntAct, MINT, CYGD and BioGrid. The web service is freely available at http://massnet.kr or http://sequenceome.kobic.re.kr/MassNet/.</P>
Sorting directionally oriented microstructures using railed microfluidics
Park, Wook,Lee, Hosuk,Park, Hyungsung,Kwon, Sunghoon Royal Society of Chemistry 2009 Lab on a chip Vol.9 No.15
<P>We demonstrate the microfluidic sorting of directionally oriented (anisotropic) microstructures by their orientational state in solution using the concept of railed microfluidics. After being injected into a microfluidic channel, the microstructures rotate and flip in various directions. In order to sort microstructures in an organized way, we designed the microstructures and the microchannel to allow for orientation-based control of microstructure movement. In order to sort microstructures based on their rotation, we used a wedge shaped fin on the microstructures and a Y-shaped railed microfluidic channel. For sorting flipped particles, we use a double-railed microfluidic channel that has grooves on both its top and bottom surfaces. By integrating the two sorting methods we demonstrated high throughput, autonomous sorting into four different orientational states: unrotated–unflipped, rotated–unflipped, unrotated–flipped, and rotated–flipped. Here we not only demonstrate orientational assembly of directionally dependent microstructures, but also present design considerations for future work.</P> <P>Graphic Abstract</P><P>Autonomous microfluidic sorting technique for directionally oriented (anisotropic) microstructures by their orientation state (flipped and unflipped, rotated and unrotated) using the wedged fin and Y-shaped rail, and double rail concepts <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b904153b'> </P>
Fabrication, Structure, and Gas Sensing of Multiple-Networked Pt-Functionalized Bi2O Nanowires.
Park, Sunghoon,An, Soyeon,Ko, Hyunsung,Lee, Chongmu American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.2
<P>Bi2O3 is highly sensitive to low concentrations of NO2 in ambient air and are almost insensitive to most other common gases. However, it still remains a challenge to enhance their sensing performance and detection limit. This study examined the influence of the functionalization of Bi2O3 nanorods with Pt on the NO2 gas sensing properties. Pt-functionalized 관-Bi2O3 nanorods were fabricated by the thermal evaporation of Bi powder followed by sputter-deposition of Pt and annealing. The Pt-functionalized nanorods ranged from 100 to 300 nm in diameter and from a few tens to a few hundreds of micrometers in length. Multiple networked Pt-functionalized 관-Bi2O3 nanorod sensors showed the responses of ~141 to ~313% at 1-5 ppm NO2 at 300 °C. These response values were 1.23-1.93 times higher than those of pristine Bi2O3 nanorod sensors at 1-5 ppm NO2. The origin of the enhancement of the sensing properties of the Bi2O3 nanorods by Pt functionalization is discussed.</P>
Light assisted room temperature ethanol gas sensing of ZnO-ZnS nanowires.
Park, Sunghoon,Kim, Soohyun,Ko, Hyunsung,Lee, Chongmu American Scientific Publishers 2014 Journal of Nanoscience and Nanotechnology Vol.14 No.12
<P>ZnO-core/ZnS-shell nanowires were synthesized by the thermal evaporation of a mixture of ZnO and graphite powders followed by the thermal evaporation of ZnS powders. Multiple networked nanowire gas sensors were then fabricated using the core-shell nanowires. The morphology, crystal structure and sensing properties of the ZnO-core/ZnS-shell nanowires to C2H5OH gas at room temperature under ultraviolet (UV) illumination were examined. The responses of the ZnO-core/ZnS-shell nanowires to C2H5OH gas were 1.2-2.1 times higher than those of the ZnO nanowires at C2H5OH concentrations ranging from 50 to 250 ppm under UV illumination. On the other hand, the resistance of the ZnO nanowires in the dark at room temperature was too high to measure. The underlying mechanism for the enhanced gas sensing properties of the ZnO-core/ZnS-shell nanowires toward C2H5OH gas is discussed.</P>