http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
로지스틱 회귀분석을 이용한 향토음식점의 선택속성에 관한 연구
홍성현 ( Song Hyun Hong ),최승철 ( Seung Churl Choi ) 한국축산경영학회 2012 농업경영정책연구 Vol.39 No.2
This study aims to examine the consumers` selection attributes and types of preference regarding native food restaurants, and gather useful information for establishing differentiated marketing strategies suitable for market segments by the selection attributes. In addition, it will contribute to securring competitiveness in providing consumers with better service by extracting differentiating factors and locations of native food restaurants, and exploring the right direction of native food industry. For the empirical analysis, the attributes were extracted based on the preliminary studies, and a survey was conducted among users of native food restaurants to examine such facotrs as importance of selection attributes status, motives of using such restaurants, demographic characteristics, and general features of the restaurants.
홍성현 ( Seong Hyun Hong ),조경현 ( Gyung Hyun Jo ),주완택 ( Wan Taek Ju ),박노동 ( Ro Dong Park ) 한국키틴키토산학회 2010 한국키틴키토산학회지 Vol.15 No.2
매미 허물로부터 화학적 처리법으로 키틴을 분리하고 그 물리화학적 특성을 조사하였다. 얻어진 키틴은 백색의 분말 형태였으며 그 수율은 31.7%였다. 매미 키틴은 30℃에서 진한 염산 가수분해 반응으로 올리고당으로 분해되었으며, 반응시간에 따라 키틴의 분해율은 증가하여 24시간에는 44.0%의 분해율을 기록하였다. GlcNAc1-3의 함량 비율은 반응 0.5시간에 66.5%, 반응 12시간에는 84.4%로 증가하였다. 반응 24시간에는 단당 GlcNAc의 함량이 79.4%를 차지하였으며, 4당 이상은 검출되지 않았다. 매미허물 키틴은 게, 새우 키틴과 같은 형태의 FT-IR 스펙트럼 양상이 나타나 α-chitin으로 확인되었고, 아세틸화도는 88.1%로 조사되었다. 매미 허물 키틴의 X-선 회절 분석결과 2θ = 9.4˚, 19.4˚에서 면간격이 9.39 Å와 4.60 Å로 각각 측정되었으며, 결정화도 및 결정크기의 값은 각각 81.9%, 4.6 nm로 α-chitin인 게, 새우 키틴의 특성치와 유사하였다. In this study, the physicochemical properties of the chitin isolated from cicadae (Platypleura kaempferi) periostracum was investigated. The prepared chitin was white flake form and the yield was 31.7%. The chitin was degraded into oligosaccharide during acid hydrolysis at 30℃ with concentrated HCl. The hydrolysis rate was 6.8% only after 0.5 h reaction, but increased to 44.0% after 24 h reaction. In distribution of the oligosaccharides in the hydrolyzates, ratio of GlcNAc1-3 content increased from 66.5% after 0.5 h reaction to 84.4% after 12 h reaction. The ratio of monomer GlcNAc content was 79.4% after 24 h reaction and no oligosaccharides bigger than GlcNAc4 was detected. It is found that cicadae periostracum chitin belongs to α-chitin resulting from the FT-IR spectra similar with those of crab and shrimp chitins. In X-ray diffractometer, two peaks were exhibited at 2θ = 9.5˚ (interplanar distance: 9.36Å) and 2θ = 19.4o(4.58Å). The crystallinity index and crystal size of the chitin were determined to be 81.9% and 4.6 nm, respectively, which are similar with those of crab and shrimp chitins, again confirming that cicadae periostracum chitin belongs to α-chitin. The degree of acetylation of cicadae periostracum chitin was calculated to be 88.1%.
ISO/IEC 18000-7 433MHz 능동형 RFID 시스템 기반의 인식거리 향상을 위한 멀티홉 릴레이 시스템
홍성현,송인찬,장홍,장경희,신동범,이형섭,Hong, Sung-Hyun,Song, In-Chan,Zhang, Hong,Chang, Kyung-Hi,Shin, Dong-Beom,Lee, Heyung-Sub 한국통신학회 2009 韓國通信學會論文誌 Vol.34 No.5
In this paper, we analyze the active RFID systems ISO/IEC 18000-7 and ISO/IEC 18000-4. In order to improve the coverage in sensor networks, which consist active RFID tag, we propose RFID multi-hop relay system using active RFID relay tag. To compare the performance between the existing ISO/IEC 18000-7 system and the proposed RFID multi-hop relay system, we introduce new system efficiency measure and sensitivity-based measure of achieved coverage. Also, we analyze the performance of the proposed system and compare it with that of the existing system through MCL (Minimum Coupling Loss) analysis and SLS (System Level Simulation) analysis. 본 논문에서는 능동형 RFID 시스템인 ISO/IEC 18000-7 및 ISO/IEC 18000-4 시스템에 대하여 살펴보고, 능동형 RFID 태그로 구성된 센서 네트워크에서 인식거리 향상을 위해 능동형 RFID 릴레이 태그를 사용하는 RFID 멀티홉 릴레이 시스템을 제안한다. 기존 ISO/IEC 18000-7 시스템과 제안된 RFID 멀티홉 릴레이 시스템의 성능평가를 위하여 Sensitivity에 의한 인식거리 및 시스템 효율과 같은 항목을 새롭게 정의하며, MCL (Minimum Coupling Loss) 분석과 SLS(System Level Simulation) 분석을 통해 제안된 시스템의 성능을 비교 및 분석한다.
홍성현(SungHyun Hong),박진표(Jinpyo Kim),문수묵(Soo-mook Moon) 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.1
copy, load, store와 같은 데이터 이동 명령은 프로그램의 수행시간을 늘리며 코드의 크기도 증가시킨다. 따라서, 최적화 컴파일러의 레지스터 할당 단계에서 이런 데이터 이동 명령들을 줄이는 것이 중요하다. 데이터 이동 명령을 줄이기 위해서 그래프 컬러링 기반의 레제스터 할당 기법의 다양한 개선안이 나와있다. 여기서는 이 중에서 조기 분할 레지스터 융합 기법을 VLIW 시뮬레이터에서 구현하여 그 성능을 확인해본다. 조기 분할 레지스터 융합 기법은 융합된 가상 레지스터가 가장 적은 비용을 가지는 레지스터를 포함하고 있는 경우, 융합된 레지스터 자체를 스필하지 않고, 잠재적 스필 단계에서 분리하여 적은 비용의 레지스터만을 스필하도록 하는 것이다.
Oral Sulfate Tablet을 이용한 대장정결 후 발생한 저나트륨혈증에 의한 뇌전증 1예
홍성현 ( Sung Hyun Hong ),이동석 ( Dong Seok Lee ),김지원 ( Ji Won Kim ),이국래 ( Kook Lae Lee ),강현우 ( Hyoun Woo Kang ),김수환 ( Su Hwan Kim ) 대한소화기학회 2022 대한소화기학회지 Vol.80 No.3
The oral sulfate tablet (OST), commercially available as Orafang<sup>®</sup> (Pharmbio Korea Co., Seoul, Korea) in Korea, is being used increasingly because of its bowel-cleansing efficacy, safety, and tolerability in adults undergoing colonoscopy. Other bowel cleansing agents, such as polyethylene glycol and sodium picosulfate/magnesium citrate, can cause plasma volume depletion and electrolyte disturbances, such as hyponatremia. On the other hand, the OST has never been reported to cause hyponatremia in Korea. To our knowledge, the authors experienced the first case of hyponatremic seizure in an 81-year-old woman to whom an OST was administered for bowel preparation before a colonoscopy. After ingesting the OST, she presented with seizure, confusion, and dyspnea. Upon arrival, her serum sodium level was 120 mEq/L, and the urine osmolality and sodium levels were 449 mOsm/kg and 253 mOsm/kg, respectively; chest imaging suggested pulmonary edema. The associated symptoms disappeared following treatment with an intravenous injection of normal saline and 3% NaCl to normalize the sodium level. This case shows that the OST can cause hyponatremia and other severe complications related to hyponatremia. (Korean J Gastroenterol 2022;80:154-157)
한국 성인의 악력과 당뇨병 유병률의 연관성: 국민건강영양조사 2014-2018
홍성현 ( Sung-hyun Hong ),변지용 ( Ji-yong Byeon ),민지희 ( Ji-hee Min ),박동혁 ( Dong-hyuk Park ),조원희 ( Won-hee Cho ),전용관 ( Justin Y. Jeon ) 한국운동생리학회(구 한국운동과학회) 2021 운동과학 Vol.30 No.1
PURPOSE: The study aimed to examine whether handgrip strength (HGS) expressed as absolute or relative to body weight is associated with fasting glucose (FG), hemoglobin A1c (HbA1c) and the prevalence of diabetes mellitus (DM) in different age categories. METHODS: A total of 28,129 adults from the Korea National Health and Nutrition Examination Survey of 2014-2018 was analyzed. To examine the relationship between HGS and variables related to DM, participants were categorized into three groups according to their HGS (Tertile). Then, participants were further categorized into six groups according to their age. One-way ANOVA and logistic regression analyses were performed. RESULTS: Compared with participants in the upper tertile of absolute handgrip strength (AHGS), those in the lower tertile were older, shorter and heavier and also had higher FG and HbA1c. When age was adjusted, the prevalence of DM was 1.19 times (95% CI: 1.03- 1.38) higher among men in the lowest tertile of AHGS. On the other hand, compared with participants in the highest tertile of relative handgrip strength (RHGS), those in the lowest tertile had 2.10 times (95% CI: 1.87-2.41) and 2.42 times (95% CI: 2.08-2.81) higher prevalence of DM in men and women, respectively. When the associations were examined according to age subcategories, significant associations between AHGS and the prevalence of DM were seen only in men in their 50s and 60s, but not seen in women in all age groups, with the exception of the 60s. However, significant associations between RHGS and the prevalence of DM were seen in all age subcategories. CONCLUSIONS: We concluded that the association between HGS and the prevalence of DM was dependent on age and RHGS is a stonger measure than AHGS.