• Journal of Chest Surgery
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• v.53 no.2
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• pp.58-63
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• 2020

Background: Despite progress in treatment, Stanford type A aortic dissection is still a life-threatening disease. In this study, we analyzed surgical outcomes in patients with Stanford type A aortic dissection according to the extent of surgery at Daegu Catholic University Medical Center. Methods: We retrospectively analyzed 98 patients with Stanford type A aortic dissection who underwent surgery at our institution between January 2008 and June 2018. Of these patients, 82 underwent limited replacement (hemi-arch or ascending aortic replacement), while 16 patients underwent total arch replacement (TAR). We analyzed in-hospital mortality, postoperative complications, the overall 5-year survival rate, and the 5-year aortic event-free survival rate. Results: The median follow-up time was 48 months (range, 1-128 months), with a completion rate of 85.7% (n=84). The overall in-hospital mortality rate was 8.2%: 6.1% in the limited replacement group and 18.8% in the TAR group (p=0.120). The overall 5-year survival rate was 78.8% in the limited replacement group and 81.3% in the TAR group (p=0.78). The overall 5-year aortic event-free survival rate was 85.3% in the limited replacement group and 88.9% in the TAR group (p=0.46). Conclusion: The extent of surgery was not related to the rates of in-hospital mortality, complications, aortic events, or survival. Although this study was conducted at a small-volume center, the in-hospital mortality and 5-year survival rates were satisfactory.

• Radiation Oncology Journal
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• v.31 no.3
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• pp.118-124
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• 2013

Purpose: The optimal treatment of advanced maxillary sinus cancer has been challenging for several decades. Intra-arterial chemotherapy (IAC) for head and neck cancer has been controversial. We have analyzed the long-term outcome of neoadjuvant IAC followed by radiation therapy (RT) and surgery. Materials and Methods: Twenty-seven patients with advanced maxillary sinus cancer were treated between 1989 and 2002. Five-fluorouracil (5-FU, $500mg/m^2$) was infused intra-arterially, and followed by RT (total 50.4 Gy/28 fractions). A planned surgery was performed 3 to 4 weeks after completion of IAC and RT. Results: At a median follow-up of 77 months (range, 12 to 169 months), the 5-year rates of overall survival in all patients were 63%. The 5-year rates of overall survival of stage T3/T4 patients were 70.0% and 58.8%, respectively. Seven of fourteen patients with disease recurrence had a local recurrence alone. The 5-year actuarial local control rates in patients with stage T3/T4, and in all patients were 20.0%, 32.3%, and 27.4%, respectively. Overall response rate after the completion of IAC and RT was 70.3%. During the follow-up, seven patients (25.9%) showed mild to moderate late complications. The tumor extent (i.e., the involvement of either orbit and/or base of skull) appeared to be related with local recurrence. Conclusion: Neoadjuvant IAC with 5-FU followed by RT and surgery may be effective to improve local tumor control in the patients with advanced maxillary sinus cancer. However, local failure was still the major cause of death. Further investigations are required to determine the optimal treatment schedule, radiotherapy techniques and chemotherapy regimens.

• Journal of the Korean Society of Industry Convergence
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• v.23 no.3
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• pp.473-480
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• 2020

In this study, I analyzed problems of safety management system of hazardous substances and proposed improvement measures. By statistics of Korea National Fire Agency it shows that hazardous substances of not less than a designated quantity were 2,180 factorys, 24,732 handling places and 85,218 storing places in 2018. also It has been conformed that Fire accidents break out year after year in factory, etc. so In this study, I analyzed the safety controllers of hazardous substances of the present law and fire statistics. therefore I has been found out the problems that the first, safety controllers' status. the second, There is no laws related design, installation, installation supervision. the third, fire safety inspection. This study will be used a basic data for preventing of extensive hazazardous substances-related accident that is very difficult handling.

• The Journal of Korean Academy of Prosthodontics
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• v.39 no.6
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• pp.698-708
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• 2001

This study was to evaluate the clinical evidence for the success and the predictability of the osseointegrated dental implants in the partially edentulous Korean patients. 201 patients have received total of 502 Branemark implants, which were restored with either single or multiunit fixed superstructures at the Implants Clinic, Yonsei University Dental Hospital. The clinical and radiographic evaluations carried out on the patients for maximum 8 years were assessed annually for peri-implant inflammation, implant mobility (PTV), Plaque Index (PI), Gingival Index (GI), Bleeding on Probing (BOP), Keratinized Mucosa width and any changes in the surrounding bone level. The radiographs were taken at completion of the restoration, and annually thereafter. On the last recall appointments the patients filled a questionnaire consist of 29 questions in four categories. The cumulative non-failure rate of success was 93.9%. The first year mean bone loss was 0.3mm and less than 0.2mm annually thereafter. The periodontal parameters, keratinized tissue width and periotest values stabilized after initial changes in the first few years. The questionnaire has shown general satisfactory responses in all four aspect of dental implants treatment, including chewing efficacy, comfort, aesthetics and speech. The results support the predictability and success of the long-term rehabilitation of implant supported prostheses in partially edentulous Korean patients.

• International Journal of High-Rise Buildings
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• v.1 no.3
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• pp.203-209
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• 2012

The purpose of this paper is to present the state of practice being used in the Philippines for the performance-based seismic design of reinforced concrete tall buildings. Initially, the overall methodology follows "An Alternative Procedure for Seismic Analysis and Design of Tall Buildings Located in the Los Angeles Region, 2008", which was developed by Los Angeles Tall Buildings Structural Design Council. After 2010, the design procedure follows "Tall Buildings Initiative, Guidelines for Performance-Based Seismic Design of Tall Buildings, 2010" developed by Pacific Earthquake Engineering Research Center (PEER). After the completion of preliminary design in accordance with code-based design procedures, the performance of the building is checked for serviceable behaviour for frequent earthquakes (50% probability of exceedance in 30 years, i.e,, with 43-year return period) and very low probability of collapse under extremely rare earthquakes (2% of probability of exceedance in 50 years, i.e., 2475-year return period). In the analysis, finite element models with various complexity and refinements are used in different types of analyses using, linear-static, multi-mode pushover, and nonlinear-dynamic analyses, as appropriate. Site-specific seismic input ground motions are used to check the level of performance under the potential hazard, which is likely to be experienced. Sample project conducted using performance-based seismic design procedures is also briefly presented.

• Journal of Korean society of Dental Hygiene
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• v.15 no.5
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• pp.751-757
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• 2015

Objectives: The purpose of the study is to investigate the needlestick injuries in the dental hygienists. Methods: A self-reported questionnaire was completed by 253 dental hygienists by convenience sampling from December 1, 2014 to March 20, 2015. The questionnaire consisted of 11 questions of sociodemographic characteristics, 5 questions of needlestick injuries experience, 3 questions of needlestick injuries during treatment and 2 questions of needlestick handling method. Data were analyzed by chi-square test, t-test and one way ANOVA analysis using SPSS 18.0 statistical program. Results: Those who had needlestick injuries within a year were 150 persons (59.3%) and the mean was 1.28 times per year. The needlestick injuries were frequent in the local anesthetic injection to gum. The completion and removal of the needle injection by hand accidently stung the digits and hand (p<0.01). Conclusions: Needlestick injuries can happen at any time to the dental hygienists in the dental clinics, so it is necessary to handle the needlestick carefully in case of anesthetic injection.

• The korean journal of orthodontics
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• v.22 no.1
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• pp.159-168
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• 1992

To predict eruptive path of maxillary canine, 13 male and 11 female malocclusions were longitudinally studied for 4 years. And to study frequency and distribution of impaction of maxillary canine, 1500 malocclusions were studied. The path, velocity and duration of maxillary canine eruption were determined by periodic angular and linear measurement using periodic orthopantomograms and cephalograms. The following results were obtained. 1. Maxillary canine was erupted with $14.5^{\circ}$ distal tipping from initial stage $98.1^{\circ}$ to final stage $83.6^{\circ}$ of axial inclination on orthopantomogram. 2. Eruptive velocity of maxillary canine was fastest on stage 4, and mean eruptive velocity was 10.5mm per year on stage 4. 3. Eruption of maxillary canine was completed 12 year 5 months in male and 11 years 8 months in female. 4. To predict the duration for eruption completion by position of maxillary canine on cephalogram, regression equation was obtained. 5. Frequency of impaction of maxillary canine was 1.47% in malocclusion and more frequent in male. Distribution of buccal and palatal, right and left impaction was no different, but unilateral impaction was more frequent.

• Korean Medical Education Review
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• v.13 no.1
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• pp.35-43
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• 2011

Purpose: Communication skills are considered as one of the essential requirements in medical education, and the training often involves exercising medical interviews with standardized patients(SP) or role play. This study investigated the helpfulness of the communication skills training programs for students' performance on the clinical performance examination (CPX). Methods: Fourth-year students who have taken one of two communication skills programs(exercising communication skills with SP or elective communication skill course with role play) completed a questionnaire on their evaluation of the helpfulness of communication skills programs immediately after finishing the CPX. Then, the programs were objectively assessed by comparing all fourth-year students' CPX scores between program participants and non-participants. Results: About 70% of participants answered that the programs were helpful to perform clinical clerkship and CPX. However, there was no difference in either the total CPX score or 2 categorical scores(integrated clinical encounter, communication and interpersonal skill) between program participants and non-participants. Conclusion: Although the students felt that the communication skills programs were helpful to their clinical activities, this study failed to find objective evidence of any effect of the programs on the CPX results. Communication skills training should be continued during clinical clerkship to maintain or enhance the skills, and it is necessary to introduce more effective methods for precise evaluation of students' communication skills.

• Journal of the Korean Society of Costume
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• v.5
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• pp.165-171
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• 1981

During the period of 3rd Tae-Jong and 4th Se-Jong, Yi Dynasty has established sound basis for ruling power and aristocratic social cast system. And the regulation for official dress has also been firmly established during the same period. The establishment of KWAN BOK SACK (Office of Hat-Dress) in 16th year of Tae-Jong (1416 A.D.) and the enforcement of KWAN BOK JI JAE (System of Hat and Dress) in 8th year of Se-Jong(1426 A.D) indicates the completion of system of official dress in the dynasty. In this study, the author tried to find out the concept of color in the ruling society since the concept of color in KWAN BOK JI JAE, which is the social reglation in the fendal dynasty, had greatly been influenced by these class of people. Effort has also been given to investigate what motivated the establishment and enforcement of KWAN BOK JI JAE, through the descriptions revealed in SE-JONG SILLOK. It can be concluded in the first that, in KWAN BOK JI JAE no new color concept appeared and its significance only remains on the fact that it establshed the social regulations which were existed before. And secondly, the works of Se-Jong in KWAN BOK JI JAE, in contrast to his magnificance in other fields, only showed great influence of toadyism (Chinese culture).

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.3
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• pp.601-613
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• 2015

This study investigated peer competence according to children's types of multiple attachment for mothers and teachers. The subjects of this study were 129 five-year old children and their 7 teachers who attend 3 kindergarten in Busan. They completed Attachment Story Completion Task(ASCT), Attachment Q-set and Peer Competence Measure. Collected data were analyzed using t-test and two-way ANOVA. The major results of this study were as follows: First, for mother, children who were securely attached showed higher peer competence than children who were insecurely attached. Girls showed higher peer competence than boys. No significant differences were found between securely attached and insecurely attached children with teachers. Girls showed higher peer competence than boys. Second, children who were attached both mother and teacher or either mother or teacher showed higher competence than children who were insecurely attached with both mother and teacher.