• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 춘계학술발표대회 논문집
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• pp.160-165
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• 2008

The concern in energy reduction in the field of architecture which takes up a big weight in domestic energy consumption is gradually increasing. For this reason, a lot of research work on this matter is being carried out. Particularly, it is generally required that currently used system in a structure for energy reduction should be maximized in its efficiency. In addition, research on several energy reduction typed systems is underway. Such a research work should not only include the one in time of the present but also keep up with the trend for future-oriented research. This research paper forecasted and analyzed the trend for global warming and demand of a structure for energy in the future by applying climate scenarios to cooling degree-day and heating degree-day. Also, this research found out the decrease in heating degree-days and increase in cooling degree-days until this moment due to the progress of global warming. In addition, as for heating degree-days in the future forecasted on the basis of HadCM3, it is estimated that the range of decrease could be ever bigger starting 2040 in case of Seoul and also starting 2010 in case of Ulsan ever after respectively. In case of cooling degree-days, it is estimated that its increase range could be bigger abruptly starting 2050, and after 2080, its increase range would be much bigger.

• 한국주조공학회지
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• 제21권1호
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• pp.24-32
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• 2001

Recently, iron aluminides based on Fe3Al and FeAl are ordered intermetallic alloys that offer good oxidation resistance, excellent sulfidation resistance, and potentially lower cost than many high-temperature structural materials. They have better strength, elasticity to weight ratio and high temperature strength, therefore, they can be cosidered as candidate heat resistance structural materials for automobiles, ships, airplanes and spaceships applications. The changes in the mechanical properties and fracture behavior were investigated for Fe-30at.%Al-5at.%Cr alloys when Ti, Hf and Zr were added respectively. For mechanical properties such as Rockwell hardness and yield strength at room temperature, those were decreased in the case of Fe-30at.%Al-5at.%Cr alloy then increased in the case of 5at.% and 10at.% addition of Ti alone. However, Rockwell hardness and yield strength decreased again at 15%Ti then increased dramatically due to the precipitation hardening of the second phase on the specimen at 20%Ti. For fracture modes, cleavage fracture showed in the case of Fe-30at.%Al and Fe-30at.%Al-5at.%Cr alloys. As the amount of Ti addition changed cleavage to transgranular fracture and to quasi-cleavage fracture at 20%Ti. When Hf, Zr and Hf+Zr were added respectively, transgranular, cleavage and quasi-cleavage fracture were coexisted.

• 대한안전경영과학회지
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• 제17권4호
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• pp.381-396
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• 2015

The study proposes multiple TRIZ contradiction solution strategies for addressing PC (Physical Contradiction) and TC (Technical Contradiction) by implementing TRIZ cause-and-effect tree. The problem associated with TC of the ends is solved by PC of means which employs a causal relationship between causes and effects. The TRIZ contradiction solution strategies demonstrated in this research are classified into 3 types of combined strategy as follows: 1. To-Be PC and AS-Is PC, 2.To-Be PC and As-Is TC, 3.As-Is PC and To-Be TC. The combined strategy of To-Be PC and As-Is PC is similar to a divide-and-conquer technique. This strategy adopts parallel strategies using 4 separation principles in time, in space, between parts and the whole, and upon condition of two reversed-PCs. Moreover, its application elucidates the conflict relationship of two TCs from the study. The integrated 4 separation principles and 40 inventive principles present an effective synergy effect from the combination, and further addresses the problems in the TRIZ contradiction resolution strategies. Combined strategy of To-Be PC and As-Is TC implements the 40 inventive principles that To-Be PC of the means resolves the As-Is TC of the ends. Combined strategy of As-Is PC and To-Be TC also uses inventive principles to the As-Is PC of the means to solve the To-Be TC of the ends. In addition, propositional and logical relationship of necessary and sufficient conditions between TC and PC is used to support the validity of 3 TRIZ contradiction solution strategies. In addition, 3 other strategies of necessary and sufficient conditions validate the contraposition relationship of the truth table. This study discusses TRIZ case studies from National Quality Circle Contest from the years between 2011 and 2014 to provide the usage guidelines of TRIZ contradiction solutions for quality purposes. Examining analysis from the case studies and investigating combined strategies allows the users to obtain comprehensive understanding.

• Journal of Periodontal and Implant Science
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• 제42권6호
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• pp.212-216
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• 2012

Purpose: The aim of this study was to evaluate the relationship between maternal periodontal disease and the health status of newborns using Apgar scores. Methods: One hundred pregnant women with periodontal disease were included in the case series and 100 pregnant women without periodontal disease were placed in the control group, respectively. The periodontal parameters of bleeding on probing (BOP), clinical attachment loss (CAL), probing depth (PD), birth weight, and Apgar scores were recorded in both groups. T-tests and Pearson's correlation coefficient were used to determine the birth weight odds ratio to analyze the relationship between the periodontal parameters of BOP, CAL, and PD on the one hand and an Apgar score of less than 7. An unpaired Student's t-test was used to analyze differences in means between the case and control groups using SPSS ver. 13. Results: The means of the ages, periodontal pocket depths, attachment loss, areas with BOP, Apgar score in the first 5 minutes and infant birth weight exhibited statistically significant differences between the case and control groups. The ratio of an Apgar score of <7 to periodontal disease was 3.14; the ratio of low birth weight risk in mothers with periodontal disease to that in mothers without periodontal disease was 2.74. Pearson's correlation coefficient revealed a significant correlation between the infant birth weight and BOP, CAL, and PD of the mother. In addition, there was a significant correlation between the Apgar score and BOP, CAL, and PD and also between the Apgar score and infant birth weight. Conclusions: The results of this study showed a significant relationship between periodontal disease and infant birth weight; in addition, there was a significant relationship between the periodontal indexes of BOP, CAL, and PD on the one hand and the Apgar score on the other.

• International Journal of Advanced Culture Technology
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• 제8권2호
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• pp.96-100
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• 2020

In this paper, I try to help the business operation so that they could continue the desirable operation despite the unfavorable conditions. It is important to reinforce for corporate growth various support measures to generate profits. However, if they are involved in criminal activities such as slush fund creation, they will have to deal with them separately. As a result, To raise awareness helps to keep the company running. Recently, the companies are in a poor condition due to overseas migration. If a company does not create profits by doing business, it is a burden to continue operating and it will eventually be hard to support and destroy. The corporate crime and white-collar crime are mostly similar types, mainly because they occur in the industry. The corporate crime proceeds throughout the company and ultimately translates into corporate profits. The white-collar crime, on the other hand, is a profitable part of the individual. In the process of generating profits, the purpose and management method of slush funds is an important issue in judging whether illegal immorality of business is intended or not. In addition, in the case of the corporate crime, it seems necessary to identify the types of slush fund raising activities in addition to the investigations of the accomplices and clinical investigations, and to apply efficient investigation methods on a case-by-case basis. At present, many companies frequently migrate overseas due to the influence of domestic regulations. In this process, if it is involved in crime such as a borrowing accounts or the purpose of slush fund creation should be treated separately.

• 한국세라믹학회지
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• 제20권2호
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• pp.99-106
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• 1983

This experiment has been carried out for the purpose of investigating the effect of $Ga_2O_3$ and $GeO_2$ additivies on sintering of magnesium oxide over the temperature range of 130$0^{\circ}C$~150$0^{\circ}C$. The effect of calcining temperature on the bulk densities of fired compacts prepared from this material was observed MgO powder has been obtained by calcining extra reagent grade magnesium carbonate(basic fired) at 90$0^{\circ}C$ for 30 minutes $Ga_2O_3$and GeO2 were added in the ratio of 1, 2, and 3 wt% to MgO and mixed with calcined MgO. The specimens were prepared by compression with pressure of $700kg/cm^2$ than fired at 130$0^{\circ}C$~150$0^{\circ}C$ for 0-5hrs. Sintering behaviour and microstructure of the fired specimens were examined. The optimum calcination temperature of magnesium carbonate was 90$0^{\circ}C$. Densification rates obeyed the equation D=K in t+c. Theoretical density in the case of addition of $Ga_2O_3$ was 23.1 kcal/mole in the case of the additive $GeO_2$ was 14.176kcal/mole. This low value would appear to support a machanism of grain boundatry diffusion The range of average grain size in the case of addition of $Ga_2O_3$ and $GeO_2$ was 21$\mu\textrm{m}$-31$\mu\textrm{m}$.

• 한국산업보건학회지
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• 제29권1호
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• pp.82-97
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• 2019

Objective: In this study, in order to investigate the relationship between leadership type and job satisfaction, the types of leadership in medical institutions are divided into transformational leadership, servant leadership and authentic leadership. In addition medical staff and non-medical staff are classified according to their job characteristics, and middle managers and operators are classified according to position. Methods: For this purpose, 589 questionnaires were applied to the medical institutions in Seoul and Gyunggi-do, and empirically analyzed with multiple regression. Results: The results of this study are first, among gender, medical or non-medical staff, position and career experience, men, non-medical staffs, and middle managers showed higher leadership, job engagement, and job satisfaction. Second, servant leadership and authentic leadership have significant positive relationships with job engagement. In the case of medical staff, only servant leadership has a positive effect on job engagement, while in the case of non-medical staff, both servant leadership and authentic leadership have significant influence on job engagement. Job satisfaction was found to have a statistically significant effect of servant leadership and authentic leadership in medical staff and non-medical staff. Third, in the case of middle managers, servant leadership showed a statistically significant effect only on job satisfaction, while servant leadership and authentic leadership had statistically significant effects on job engagement and job satisfaction of operators. Conclusions: This study suggests the possibility and applicability of authentic leadership in addition to transformational leadership and servant leadership in hospital organizations. Also, by identifying differences in the effects on organizational effectiveness, it is also suggested the need for research on identifying leadership factors that reflect strictly distinctive job characteristics.

• 한국건축시공학회지
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• 제20권6호
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• pp.567-576
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• 2020

본 연구는 공동주택의 하자소송의 사례분석을 통해 하자소송단계에서 추가적으로 하자로 인정되는 하자 항목을 제안한다. 이 하자 항목은 하자소송에서 추가적인 비용의 증가, 일정 지연, 재감정 혹은 추가소송을 방지할 수 있을 것이다. 하자소송에서는 입주자 및 건설사에서 사전에 인지하지 못한 새로운 하자항목이 발생되며, 이를 새로운 하자인정항목으로 정의하였다. 이를 위해 본 연구에서는 국내의 15개의 하자소송의 사례분석을 실시하였다. 이를 통해 77개의 소송하자를 1차 선별하고 전문가 자문을 통해 최종적으로 23개의 소송하자를 도출하였다. 이후 하자의 요인을 분석하여 최종적으로 23개의 소송항목을 총 10개의 요인항목으로 정립하였으며, 사례연구를 통해 효용성을 분석하였다. 본 연구의 결과는 하자의 발생을 저감하고 분쟁을 최소화하는 데 기여할 수 있을 것이다.

• 혜화의학회지
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• 제23권1호
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• pp.21-55
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• 2014

Objectives : This report describes the original references of 154 formulas related to the use of Rhei Rhizoma main blended from Dongeuibogam. Methods : This study analyzes the original references of 154 formulas including Rhei Rhizoma as a key component in Dongeuibogam. Results : There were five types as follows: 1.There is no exact match between 154 formulas in Dongeuibogam and the original formulas in references. 2. Case that could not found the original formula in reference: 22%. 3. Case that the citation is the similar to the original reference: 4%. 4. Case that the citation is not same to expression but contents basically: 73%. 5. Case of addition of content: 1% Conclusions : Most formulas related to the use of Rhei Rhizoma main blended from Dongeuibogam are similar to the contents in the original references. But we can find that Heo Jun, who writes Dongeuibogam, modifies the contents for his intention of editing, idea and situation in Korea.

• 대한암한의학회지
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• 제16권2호
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• pp.53-61
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• 2011

Objective : This study reports one case of urachal cancer patient treated with oriental medicine. Methods : One patient who was diagnosed with stage IVB urachal cancer was admitted and treated using different modalities of herbs, acupuncture, and pharmacopuncture. An herbal formula, Hang-Am Plus, Myun-Yuk Plus, and Nobongbiki-jung was given three times a day with daily acupuncture treatment session, in addition to Sweet bee venum pharmacopuncture injection which were administered two~three times a week. After treatment, patient's symptoms and blood test results were observed and analyzed. Results : During treatment, symptoms and laboratory findings of patient were maintained in stable condition about 4 months, and the patient survived during 22 months after operation (5.5 months after oriental medicine treatment). Conclusions : This case study shows minimum evidence of efficacy of oriental medicine for managing symptoms of urachal cancer. Considering this is only single case study, further research is needed to confirm these results.