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사각형 단면을 갖는 수직부재와 접합되는 슬래브의 탄성 유효보폭
최정욱,송진규,최기봉 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.1
An effective beam width model, in which the actual slab is replaced with a beam element, is commonly used in design to model the lateral load response of fiat plate structures In tins model, the beam element has a thickness equal to that of the slab, and an effective beam width equal to some fraction of the slab transverse width Many techniques to obtain the effective beam width based on elasticity have been proposed However, the application of these methods are limited to the slab connected to the columns A parametric study on slab-vertical member connected is performed using a finite element technique In the study, a vertical member's rectangularity, whose effects have been commonly Ignored in previous studies, is mainly considered. Based on the numerical results, the methods for calculating the elastic effective beam width of the slab connected to vertical members, including structural walls, with various rectangular cross-section are developed The proposed methods can more precisely predict the lateral stiffness of flat plate structure" than previous analysis methods
근관형성 후 동통에 대한 수산화칼슘의 효과에 관한 연구
남욱,박상혁,최기운 大韓齒科保存學會 2006 Restorative Dentistry & Endodontics Vol.31 No.2
본 연구는 치성 동통을 보이는 치아의 수산화칼숨의 사용 여부에 따른 동통 감소 효과를 판단하고자 시행하였다. 2003년 12월부터 2004년 9월 사이에 경희대학교 치과대학 부속 치과병원 치과보존과에 치성 동통으로 내원한 환자 213명으로부터 근관형성을 시행한 237개의 치아를 대상으로 환자의 성별 및 연령, 치료부위, 재근관 치료의 여부, 치수의 상태, 술전 치아 상태와 술전 동통의 정도를 기록하였다. 수산화칼슘을 적용하지 않은 군 (1군)과 수산화칼슘을 적용한 군 (2군)으로 분류하였다. 환자들에게 설문지를 배분하여 다음 내원시 치료 후 4시간, 2일 및 7일에 술후 동통의 발생 여부와 동통의 정도를 기록하도록 하였다. 수집한 자료들은 Chi-square analysis (p<0.05)를 사용하여 비교, 분석한 결과 근관내 약제로써 수산화칼슘은 술후 동통을 예방하거나 감소시키는 효과를 가지고 있지 않다는 것을 알 수 있었다. The purpose of this clinical study is to assess whether calcium hydroxide as an intracanal medication affects post-treatment pain in teeth especially odontogenic pain which comes from inflammation of the pulp and periradicular tissues when compared with no intracanal medication. From 213 patients who has been treated 237 root canals due to significant pain (moderate-to-severe), we recorded their age, sex, treated tooth, degree of pain, pre-operative states of the tooth. We classified patients into 2 test group: Group 1 (not gain intracanal Ca(OH)_(2)), Group 2 (gain intracanal Ca(OH)_(2)). Through the survey from the patients, we let them write down the occurrence and degree of post-treatment pain in 4hours, 2days, 7days after treatment as none. mild, moderate or severe. The followings were evaluated: the overall incidence of flare-ups, the overall incidence of post-treatment pain in each group at each time period, the incidence of post-treatment pain in each group at each time period as related to pre-operative states of the teeth. These were compared statistically with Chi-square analysis (p < 0.05). Under the condition of this investigation, no difference was observed in the incidence of post-treat-ment pain between the two groups. Therefore, Ca(OH)_(2)as intracanal medication had no effect on preventing or decreasing the post-treatment pain.
박춘식,장정욱,유기재,최성민 國立 昌原大學校 産業技術硏究所 2002 産技硏論文集 Vol.16 No.-
This Study investigated a possibility of lateral movement in the reconstruction field of Nongso bridge at Nongso-ri, Joochon-myeon, Kimhae. The methods applied in this study were the judgement formula and the Finite Element Method(FEM). The conclusions are shown in the following. 1) The application of the FEM, as well as the judgement formula resulted in the lateral movement. 2) Bridge abutment and foundation must be constructed after completing consolidation. 3) The occurrence possibility of lateral movement should be judged by the FEM that can re-present field conditions. 4) Lateral movement will take place in the case. Hence, settlement of proper countermeasure method should be followed by the construction.
이상주,이영모,이한규,최대은,박기현,이강욱,신영태 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2
Autosomal dominant polycystic kidney disease(ADPKD) is one of most common hereditary disorder. It is potentially fatal and the major mobilities are hypertension and renal failure. To elucidate clinical characteristics and outcomes of ADPKD, 67 ADPKD patients were analyzed retrospectively. The male to female ratio was 48 years for males and 42 years for females. The factors leading to the dignosis of ADPKD were flank or abdominal pain (46%), palpable abdominal mass (24%), incidental findings (18%), gross hematuria and headache. Urinalysis result showed hematuria (31%), proteinuria (19%), pyuria (18%). Among renal complications hypertension (67%) was the most common. Other complications were urolithiasis (16%) upper urinary tract infection (9%), cyst infection (7%). Azotemia was observed in 24% of cases. Echocardiography showed left ventricular hypertrophy in 24% and valvular regurgitation in 18% of cases, but there was no mital valve prolapse. Cerebrovascular events occurred in 6 cases (2 cases of intervertebral hemorrhage and 4 cases of cerebral infarction). Hipatic cyst were observed in 64% of cases. Eighteen cases culminated in end stage renal failure (ESRF) at an of 47. According to this study, the most common complications of ADPKD was hypertension (67%), ESRF (27%), and cerebrovascular event (9%). Hypertension was more frequently observed in increased creatinine group than normal.
권선옥,김우식,오명기,나종천,이홍기,조욱현,최석구 인제대학교 2006 仁濟醫學 Vol.27 No.-
The use of critical pathways for a variety of clinical conditions has grown rapidly in recent years, particularly pathways for patients with acute myocardial infarction. We intend to determine the impact of a clinical pathway on ST-elevation myocardial infarction (STEMI) and to evaluate the efficacy and safety of facilitated percutaneous coronary intervention (PCI) compared with primary PCI. Low risk STEMI patients (ST elevation >0.1mV in more than 2 limb leads or ST elevation >0.2mV in contiguous precordial lead, chest pain lasting more than 30 min without response to nitroglycerin) will be included. All patients will be also treated medically according to critical pathway. STEMI is one of the common diseases in emergency medicine and so it is necessary to establish realistic treatment guidelines. The use of critical pathways will improve the quality of care.
Gi-wook Choi,Yule Kim,김근 한국생물공학회 2009 Biotechnology and Bioprocess Engineering Vol.14 No.4
The objective of this work was to evaluate the production of bioethanol from a new Korean variety of corn (Gangdaok) and to assess low temperature pre-treatment of corn mashes before simultaneous saccharification and fermentation. Corn mashes containing 178 g/L of total sugar were fermented with Saccharomyces cerevisiae CHY 1011(KCTC 11250BP) at 35°C. Fermentation of mash supplemented with solid glucoamylase was completed within 48 h, and the ethanol produced was 474.0 and 473.1 L/ton as dry base with low temperature pre-treatment and pressure pre-treatment, respectively. Furthermore, the DDGS of Gangdaok cultivar contained more essential amino acids (21.1 mg/g) than did Ambrosia cultivar (USA corn), which is a widely used feedstock. In addition, there were no significant differences in ethanol yield or amino acid concentration in DDGS between low temperature pre-treatment and pressure pre-treatment. The results show that Gangdaok holds potential economic advantages if applied to the bioethanol and feed industries.
Gi-An Lee,Yu-Mi Choi,Jung-Yoon Yi,Jong-Wook Chung,Myung-Chul Lee,Kyung-Ho Ma,Sok-young Lee,Jin-Woong Cho,Jung-Ro Lee 한국작물학회 2014 Korean journal of crop science Vol.59 No.4
Soybean (Glycine max L.) is crucial legume crop as source of high quality vegetable protein and oil, and Korea is regarded as a part of center of soybean origin. To expand the information of conserved genetic diversity, we analyzed the genetic variability of soybean collection mainly introduced Korean accessions using 75 microsatellite markers. A total of 1,503 alleles with an average value of 20.0 alleles were detected among 644 accessions. Korean collection revealed average allele number of 13.4 while Chinese, Japanese and Southeast Asian accessions showed 9.0, 5.4 and 6.5 mean alleles, respectively. Especially, Korean accessions showed more number of private allele per locus as 3.4 contrary to other geographical groups. The mean expected heterozygosity and polymorphic information content was 0.654 and 0.616, respectively, and expected heterozygosity values were not significantly distinguished according to the geographical groups. The phylogenetic dendrogram and deduced population structure based on DNA profiles of 75 SSR loci showed Korean accessions formed distinct gene pool against Chinese accessions, and could be divided into five subpopulations. Korean soybean accessions have specific genetic diversity and might be serve the valuable alleles for bio-industry as a part of the center of soybean origin.