Sang Duk Hong, Hun‐Jong Dhong, Hyo Yeol Kim, Jung Hyeob Sohn, Yong Gi Jung, Seung‐Kyu Chung, Ju Yeon Park, Jin‐Kyoung Kim,
Objectives/Hypothesis We evaluated the change in upper airway collapse according to the depth of sedation during drug‐induced sleep endoscopy (DISE), as well as characteristics possibly associated with that change. Study Design Prospective, single center, observational study. Methods Twenty‐nine patients with upper airway collapse were twice evaluated using DISE according to the depth of sedation, as confirmed by the bispectral index (BIS), which is a measure of the level of consciousness. Changes ...
Tópico(s): Neuroscience of respiration and sleep
2013 - Wiley | The Laryngoscope
Juyul Lee, Jinyi Liang, Myung-Don Kim, Jae-Joon Park, Bonghyuk Park, Hyun Kyu Chung,
... Jae-Joon Park (jjpark@etri.re.kr), Bonghyuk Park (bhpark@etri.re.kr), and Hyun Kyu Chung (hkchung@etri.re.kr) are with the 5G ...
Tópico(s): Advanced MIMO Systems Optimization
2016 - Electronics and Telecommunications Research Institute | ETRI Journal
S.-I. Han, Moon-Kyu Chung, Miok Park,
During the past ten years, much attention has focused on the contribution of co-operatives in satisfying the socially relevant needs of communities. The number of co-operatives has voluntarily increased to attract and network local stakeholders as key players in various regions in South Korea. This paper aims to explain how and to what extent stakeholder involvement in these co-operatives has been successful or limited to meeting new socio-economic needs by focusing on two case studies – namely, Wonju ...
Tópico(s): Nonprofit Sector and Volunteering
2013 - Oxford University Press | Community Development Journal
Sung Bum Kim, Kyeong Ok Kim, Byung Ik Jang, Eun Soo Kim, Kwang Bum Cho, Kyung Sik Park, Min Kyu Chung, Seong Woo Jeon,
Adherence to medication during the treatment of inflammatory bowel disease (IBD) is important in terms of maintaining remission. According to studies on adherence to medication in other chronic diseases, non-adherence is associated with negative attitudes to treatment. The aims of this study were to assess adherence rates and IBD patients' beliefs and attitudes regarding medication using a questionnaire based approach.Two hundred and eighty seven patients from three tertiary hospitals were enrolled ...
Tópico(s): Pharmaceutical studies and practices
2015 - Wiley | Journal of Gastroenterology and Hepatology
Seung‐Kyu Chung, Seung Jin Lee, Sang‐Ho Park, Se-Whan Lee, Won‐Yong Shin, Dong‐Kyu Jin,
A single coronary artery (SCA) is a rare congenital anomaly of the coronary circulation, which is often associated with myocardial ischemia and other congenital cardiac anomalies. A 77-year-old woman visited our hospital complaining of typical chest pain. Coronary angiography revealed an isolated SCA. The right coronary artery did not originate from the aorta, but instead emerged from the distal left circumflex artery, with significant stenosis at the proximal portion of the left anterior descending ...
Tópico(s): Vascular anomalies and interventions
2010 - Korean Society of Circulation | Korean Circulation Journal
Young Moon Chae, Tae Young Jang, In Yong Park, Seung Kyu Chung, Mignon Park,
This paper deals with the problem of improving the capability of the medical decision support system (MDSS) for diagnosing nasal allergy by integrating the previously developed expert system with the neural network approach. Three knowledge acquisition methods were used to develop the expert system: statistical, rule-based, and the combined approach. Among the three, a combined approach showed the best prediction rate based on discriminant analysis. Using the results of a combined approach as input ...
Tópico(s): Air Quality Monitoring and Forecasting
1992 - Yonsei University College of Medicine | Yonsei Medical Journal
Kyeongmee Park, Chang-Dae Kim, Wonse Park, Young‐Bum Park, Moon-Kyu Chung, Sungtae Kim,
In this study, we evaluated changes in bone remodeling in an irradiated rat calvarial defect model according to duration of hyperbaric oxygen therapy.The 28 rats were divided into four groups. Radiation of 12 Gy was applied to the skull, and 5-mm critical size defects were formed on both sides of the skull. Bone grafts were applied to one side of formed defects. From the day after surgery, HBO was applied for 0, 1, and 3 weeks. At 6 weeks after bone graft, experimental sites were removed and analyzed ...
Tópico(s): Mesenchymal stem cell research
2019 - Hindawi Publishing Corporation | BioMed Research International
Doo‐Sik Kong, Hyung Jin Shin, Hyo Yeol Kim, Seung Kyu Chung, Do‐Hyun Nam, Jung-Il Lee, Kwan Park, Jong Hyun Kim,
Abstract Compressive optic neuropathy is a rare condition that may be caused by trauma or non-traumatic events. Endoscopic techniques have evolved to provide an easier surgical approach to decompression. The aim of this study was to determine the endoscopic anatomy of the orbital apex and to identify the optimal targets for endoscopic optic nerve decompression. We report five patients with endoscopic optic nerve decompression: two with traumatic optic neuropathies, two with fibrous dysplasias, and one with ...
Tópico(s): Meningioma and schwannoma management
2011 - Elsevier BV | Journal of Clinical Neuroscience
Sang Duk Hong, Hun‐Jong Dhong, Seung‐Kyu Chung, Hyo Yeol Kim, Jun-Oh Park, Sang Yun Ha,
Although biofilms have been implicated in poor prognosis after endoscopic sinus surgery (ESS), traditional methods detecting biofilm such as scanning electron microscope and confocal scanning laser microscope were rarely used in the practice. The aims of this study was to determine whether the presence or absence of a biofilm detected by hematoxylin and eosin (H&E) staining followed by light microscopy (LM) that is widely used in daily practice, predicts surgical outcomes after ESS.Retrospective analysis ...
Tópico(s): Infectious Diseases and Mycology
2014 - Korean Society of Otorhinolaryngology-Head and Neck Surgery | Clinical and Experimental Otorhinolaryngology
Youn Kyu Chung, Chang-Hung Chen, D. W. Langer, Y. S. Park,
The degradation of insulating films and GaAs substrates by exposure to low pressure plasma is investigated. In Si–SiO2 structures, the increased density of fast surface states and the nonuniform storage of positive trapped charges within the oxide layer is responsible for the degradation of MOS devices exposed to low pressure plasma. The charge carrier reduction due to the creation of compensating defects during the hydrogen plasma treatment of n-GaAs is reported.
Tópico(s): Plasma Diagnostics and Applications
1983 - AIP Publishing | Journal of Vacuum Science & Technology B Microelectronics Processing and Phenomena
Re‐Mee Doh, Sungtae Kim, Ki Chang Keum, Jun Won Kim, June‐Sung Shim, Han‐Sung Jung, Kyeongmee Park, Moon-Kyu Chung,
On maxillofacial tumor patients, oral implant placement prior to postoperative radiotherapy can shorten the period of prosthetic reconstruction. There is still lack of research on effects of post-implant radiotherapy such as healing process or loading time, which is important for prosthodontic treatment planning. Therefore, this study evaluated the effects of post-implant local irradiation on the osseointegration of implants during different healing stages.Custom-made implants were placed bilaterally ...
Tópico(s): Oral and Maxillofacial Pathology
2016 - | The Journal of Advanced Prosthodontics
Jang Woo Shin, Jin Young Son, Hanumantha Rao Balaji Raghavendran, Weon Kyu Chung, Hyeong Geug Kim, Hye Jung Park, Seong Soon Jang, Chang‐Gue Son,
Tópico(s): Immune Cell Function and Interaction
2011 - Springer Science+Business Media | Clinical & Experimental Metastasis
Sang Duk Hong, Do‐Hyun Nam, Jun-Oh Park, Hyo Yeol Kim, Seung‐Kyu Chung, Hun‐Jong Dhong,
Olfaction has been shown to have a large impact on patients' lives. Endoscopic pituitary surgery is associated with potentially significant damage to olfactory tissues. The objective of this study was to determine the effect of cauterization on olfactory function when performing endoscopic pituitary surgery with a nasoseptal "rescue" flap.A retrospective review was performed of prospectively collected data. Olfaction was the primary outcome and was measured using the subjective visual analog scale ( ...
Tópico(s): Pituitary Gland Disorders and Treatments
2014 - SAGE Publishing | American Journal of Rhinology and Allergy
Anny Mulya, Ji‐Young Lee, Abraham K. Gebre, Elena Boudyguina, Soon-Kyu Chung, Thomas L. Smith, Perry L. Colvin, Xian-Cheng Jiang, John S. Parks,
We investigated the in vivo metabolic fate of pre-β HDL particles in human apolipoprotein A-I transgenic (hA-ITg) mice. Pre-β HDL tracers were assembled by incubation of [125I]tyramine cellobiose-labeled apolipoprotein A-I (apoA-I) with HEK293 cells expressing ABCA1. Radiolabeled pre-β HDLs of increasing size (pre-β1, -2, -3, and -4 HDLs) were isolated by fast-protein liquid chromatography and injected into hA-ITg-recipient mice, after which plasma decay, in vivo remodeling, and tissue uptake were monitored. ...
Tópico(s): Diabetes, Cardiovascular Risks, and Lipoproteins
2008 - Elsevier BV | Journal of Lipid Research
Chang-Kyu Chung, Woon‐Seong Kwon, Kyung-Woon Jang, Jinhyoung Park, Soon-Bok Lee, Kyung‐Wook Paik,
Nonconductive films (NCFs) are one of the polymer interconnect materials for flip-chip interconnection. NCFs containing no conductive particles play several roles such as adhesion, insulation, and underfilling at the same time. The most important issue of NCF flip-chip-on-board (FCOB) assemblies is thermal cycling reliability. Thermomechanical properties of cured NCFs, such as glass transition temperature (T g ), storage modulus (E'), and coefficient of thermal expansion (CTE), significantly affect the ...
Tópico(s): Additive Manufacturing and 3D Printing Technologies
2007 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Components and Packaging Technologies
Sunkyu Lee, Hyunmin Choi, June‐Sung Shim, Moon-Kyu Chung, Young‐Bum Park,
Tópico(s): Orthopaedic implants and arthroplasty
2015 - Springer Science+Business Media | Tissue Engineering and Regenerative Medicine
Wonsop Kim, Kyungnam Lee, Myung-Don Kim, Jae Joon Park, Hyun Kyu Chung, Hyuckjae Lee,
The performance of MIMO-OFDM beamforming systems with maximal ratio combining receivers is considered based on the extensive wideband 2 × 8 (i.e., 2 transmitting and 8 receiving antennas) MIMO channel measurement data in non line-of-sight urban macrocell environments. Using the experimental observation that the probability density function (PDF) of the measured maximum eigenvalue for H† m H m , where H m and superscript † denote a MIMO channel frequency response matrix and conjugation and transposition, ...
Tópico(s): Advanced Wireless Communication Techniques
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Wireless Communications
Shin Hwang, Deok‐Bog Moon, Chul‐Soo Ahn, K.-H. Kim, Tae‐Yong Ha, Gi‐Won Song, Dong‐Hwan Jung, G.-C. Park, H.C. Lee, Yoon Se Lee, Yong‐Kyu Chung, Bashar Abdulkarim, Seok‐Geun Lee,
This study sought to establish an actual risk-based long-term screening protocol for hepatocellular carcinoma (HCC) recurrence after liver transplantation (OLT).The study was a retrospective review of medical records from 334 HCC patients who underwent primary living donor OLT and followed up for at least 5 years.Overall 10-year patient survival rate was 67.5%, with a 4.8% perioperative mortality. HCC recurred in 68/318 (21.4%) surviving patients over a mean follow-up of 77 months. HCC recurrence was ...
Tópico(s): Liver Disease and Transplantation
2013 - Elsevier BV | Transplantation Proceedings
Myung-Don Kim, Jae Joon Park, Hyun Kyu Chung, Xuefeng Yin,
This paper presents cross-correlation characteristics of multi-link channels considering cooperative communication scenarios. We introduce the wideband multiple input multiple output (MIMO) relay channel sounding system to simultaneously measure multi-link channels at 3.7GHz frequency band. The outdoor channel measurement campaign has been performed by realization of two-link channels in residential environments of Korea. We define a signal model with an angle and a relative distance of mobile station. ...
Tópico(s): Millimeter-Wave Propagation and Modeling
2012 - Institute of Electrical and Electronics Engineers | International Conference on Advanced Communication Technology
Gwanghui Ryu, Yoon Kyoung So, Min Young Seo, Woori Park, Hyo Yeol Kim, Hun‐Jong Dhong, Seung‐Kyu Chung, Sang Duk Hong,
Background Radionecrosis is a complication of nasopharyngeal carcinoma (NPC) that is difficult to treat. Endoscopic debridement is the first-line treatment for radionecrosis. After debridement, however, either bone or the internal carotid artery is exposed and requires mucosal coverage. Objectives This study sought to demonstrate the effectiveness of a nasoseptal flap (NSF) after endoscopic debridement of radionecrosis in the reconstruction ofnasopharyngeal or skull base defects. Methods Nine patients ...
Tópico(s): Cleft Lip and Palate Research
2018 - SAGE Publishing | American Journal of Rhinology and Allergy
Deok‐Bog Moon, Sung‐Gyu Lee, Yong‐Kyu Chung, Woo‐Hyoung Kang, Ki‐Hun Kim, Gi‐Won Song, Dong‐Hwan Jung, Tae‐Yong Ha, Chul‐Soo Ahn, Gil‐Chun Park, Shin Hwang, Young‐In Yoon, Hwui‐Dong Cho, Sang‐Hyun Kang, Jin-Uk Choi, I.-J. Jeong, Byeong-Gon Na, Minjae Kim, Sang Hoon Kim, Kyu‐Bo Sung, Gi‐Young Ko, Dong‐Il Kwon, Sung‐Koo Lee, Dongwook Oh, Gyu‐Sam Hwang, Jun‐Gol Song, In‐Gu Jun, Young‐Jin Moon, Sang‐Oh Lee, Sung‐Han Kim, Jin Won Huh,
More than 400 liver transplants were performed at Asan Medical Center (AMC) in 2011, and over 500 liver transplants including 420 living-donor liver transplants (LDLTs) were performed in 2019. Herein, we report the methodology of these procedures. Since the first adult LDLTs at AMC using the left and right lobes were successfully performed, various innovative techniques and approaches have been developed: modified right lobe, dual graft, donor exchange for ABO incompatibility, expansion of indications ...
Tópico(s): Transplantation: Methods and Outcomes
2020 - Elsevier BV | Transplantation Proceedings
Dong‐Hwan Jung, Shin Hwang, Seung‐Mo Hong, Yong‐Kyu Chung, Gi‐Won Song, Young Joo Lee, Ki‐Hun Kim, Chul‐Soo Ahn, Deok‐Bog Moon, Tae‐Yong Ha, Gil‐Chun Park, Han Chu Lee, Young‐Suk Lim, Eun Sil Yu, Sung‐Gyu Lee,
Tópico(s): Cancer-related molecular mechanisms research
2016 - Springer Science+Business Media | World Journal of Surgery
Woori Park, Do‐Hyun Nam, Doo‐Sik Kong, Kyung Eun Lee, Song I Park, Hyo Yeol Kim, Seung‐Kyu Chung, Yong Gi Jung, Sang Duk Hong,
Tópico(s): Pituitary Gland Disorders and Treatments
2021 - Springer Science+Business Media | European Archives of Oto-Rhino-Laryngology
Mong Kyu Chung, Chung Seo Park, Jea Jin Baek, Chul‐Hwan Lee,
Tópico(s): Marine Ecology and Invasive Species
2003 - | CORROSION
I-Ji Jung, Shin Hwang, Tae‐Yong Ha, Gi‐Won Song, Dong‐Hwan Jung, Chul‐Soo Ahn, Deok‐Bog Moon, Ki‐Hun Kim, Gil‐Chun Park, Young‐In Yoon, Yo‐Han Park, Hwui‐Dong Cho, Jae Hyun Kwon, Yong‐Kyu Chung, Sang‐Hyun Kang, Sung‐Gyu Lee,
... Gil-Chun Park, Young-In Yoon, Yo-Han Park, Hui-Dong Cho, Jae-Hyun Kwon, Yong-Kyu Chung, Sang-Hyun Kang, Sung-Gyu Lee. Korean J ...
Tópico(s): Liver Disease and Transplantation
2020 - | Korean Journal of Transplantation
Jae Yeon Park, Tae Geun Lee, Ji‐Ye Kim, Dong Won Lee, Yoon Kyu Chung, Won Jai Lee,
Background There are several options for replacement of the dermal layer in full-thickness skin defects. In this study, we present the surgical outcomes of reconstruction using acellular dermal substitutes by means of objective and subjective scar assessment tools. Methods We retrospectively reviewed the medical records of 78 patients who had undergone autologous split-thickness skin graft with or without concomitant acellular dermal matrix (CGDerm or AlloDerm) graft. We examined graft survival rate ...
Tópico(s): Reconstructive Facial Surgery Techniques
2014 - | Archives of Craniofacial Surgery
Yong Gi Jung, Hyun‐Jin Cho, Ga Young Park, Jin‐Young Min, Hyo Yeol Kim, Hun‐Jong Dhong, Seung Kyu Chung, Seon Woo Kim,
Background When the skin-prick test (SPT) and in vitro test such as ImmunoCAP assay are performed simultaneously, results do not always coincide in some patients. Our objectives, therefore, were (1) to assess differences in allergic test results according to age group and (2) to establish appropriate guidelines for diagnosing mite allergy according to age. Methods A total of 692 participants complaining of allergic rhinitis symptoms participated. Patients were divided according to age; the mean age ...
Tópico(s): Food Allergy and Anaphylaxis Research
2010 - SAGE Publishing | American Journal of Rhinology and Allergy
Ga Young Park, Hyo Yeol Kim, Jin‐Young Min, Hun‐Jong Dhong, Seung‐Kyu Chung,
The risk factors for maxillary fungal ball are largely unknown. The aim of this study was to determine whether endodontic treatment of maxillary teeth is a risk factor for fungal ball development in the maxillary sinus, and to identify other possible risk factors.One hundred and twelve case patients diagnosed with maxillary fungal ball (FB group) and age and gender matched control patients diagnosed with chronic paranasal rhinosinusitis (PNS group) were included to determine associations between previous ...
Tópico(s): Drug-Induced Adverse Reactions
2010 - Korean Society of Otorhinolaryngology-Head and Neck Surgery | Clinical and Experimental Otorhinolaryngology
Jae Joon Park, Won Sop Kim, Myung Don Kim, Hyun Kyu Chung,
This paper presents the BECS (Band Exploration and Channel Sounding) 2005 system which was developed in ETRI to measure a MIMO wireless channel characteristics at 3.7 GHz carrier frequency and 100 MHz bandwidth. We present propagation analysis results for so called typical urban macrocell scenario in Korea. Propagation characteristics between LOS and NLOS scenarios have been compared, and we introduce small scale channel characteristics, i.e. root-mean-square (RMS) delay spread, rms angular spread, ...
Tópico(s): Wireless Communication Networks Research
2007 - Institute of Electrical and Electronics Engineers | IEEE Vehicular Technology Conference
Jin Hyoung Park, Chang Kyu Chung, Kyoung Wook Paik, Soon Bok Lee,
Among many factors that influence the reliability of a flip-chip assembly using NCF interconnections, the most effective parameters are often the coefficient of thermal expansion (CTE), the modulus (E), and the glass transition temperatures (Tg). Of these factors, the effect of Tg on thermal deformation and device reliability is significant; however, it has not been shown clearly what effect Tg has on the reliability of NCF. The Tg of a conventional NCF material is approximately 110°C. In this study, ...
Tópico(s): Electronic Packaging and Soldering Technologies
2006 - Trans Tech Publications | Key engineering materials