Plasma arc 광원을 이용한 과산화수소의 치아미백 효과

이혜진(Hye-Jin Lee1),김민영(Min-Young Kim),양달님(Dal-Nim Yang) 한국구강보건과학회 2016 한국구강보건과학회지 Vol.4 No.2

The purpose of this study was to compare of the effectiveness of tooth bleaching with different hydrogen peroxide concentrations and light activated plasma arc on extracted premolar tooth The 100 specimens were stained using the CEYLON black tea. Among of them 60 specimens were selected by lightness values (*L) and were classified into five groups (n=12): Group Ⅰ, Distilled water; Group Ⅱ, 5% hydrogen peroxide gel ; GroupⅢ, 5% hydrogen peroxide+plasma arc; Group Ⅳ, 15% hydrogen peroxide; GroupⅤ, 15% hydrogen peroxide +plasma arc. Specimens were bleached until 4 times (60 min). The color change (ΔE*) of specimens was measured after stained and each bleaching time by Shade Eye-NCC. The samples were analyzed qualitatively by evaluating morphological changes in the SEM images, microhardness and quantitatively by using roughness parameters (Ra). The acquired data was analyzed by paired t-test and one-way ANOVA followed by Tukey s multiple test for variable at a 0.05 significant level. The color changes (ΔE*) significantly increased after bleaching in all groups (p<0.05). Microhardness (VHN) significant decreased after bleaching in all groups AFM and SME images exhibited that the surfaces of specimens became roughed after bleaching. Especially, Group of hydrogen peroxide with plasma arc showed more rougher than hydrogen peroxide without plasma arc in SEM. This study suggested that hydrogen peroxide with plasma arc may be better tooth whitening effects than only hydrogen peroxide.

Development of a minipig model for lung injury induced by a single high-dose radiation exposure and evaluation with thoracic computed tomography

Lee, Jong-Geol,Park, Sunhoo,Bae, Chang-Hwan,Jang, Won-Suk,Lee, Sun-Joo,Lee, Dal Nim,Myung, Jae Kyung,Kim, Cheol Hyeon,Jin, Young-Woo,Lee, Seung-Sook,Shim, Sehwan Oxford University Press 2016 JOURNAL OF RADIATION RESEARCH Vol.57 No.3

<P>Radiation-induced lung injury (RILI) due to nuclear or radiological exposure remains difficult to treat because of insufficient clinical data. The goal of this study was to establish an appropriate and efficient minipig model and introduce a thoracic computed tomography (CT)-based method to measure the progression of RILI. Göttingen minipigs were allocated to control and irradiation groups. The most obvious changes in the CT images after irradiation were peribronchial opacification, interlobular septal thickening, and lung volume loss. Hounsfield units (HU) in the irradiation group reached a maximum level at 6 weeks and decreased thereafter, but remained higher than those of the control group. Both lung area and cardiac right lateral shift showed significant changes at 22 weeks post irradiation. The white blood cell (WBC) count, a marker of pneumonitis, increased and reached a maximum at 6 weeks in both peripheral blood and bronchial alveolar lavage fluid. Microscopic findings at 22 weeks post irradiation were characterized by widening of the interlobular septum, with dense fibrosis and an increase in the radiation dose–dependent fibrotic score. Our results also showed that WBC counts and microscopic findings were positively correlated with the three CT parameters. In conclusion, the minipig model can provide useful clinical data regarding RILI caused by the adverse effects of high-dose radiotherapy. Peribronchial opacification, interlobular septal thickening, and lung volume loss are three quantifiable CT parameters that can be used as a simple method for monitoring the progression of RILI.</P>

일부 치위생학 전공자와 타 전공 대학생 간의 구취 인지 차이

양달님(Dal-Nim Yang),김민영(Min-Young Kim),이혜진(Hye-Jin Lee) 한국구강보건과학회 2015 한국구강보건과학회지 Vol.3 No.1

The halitosis could be caused by several reasons; among the reasons, the bad oral surroundings, the oral disease and hyposalivation are the causes of the oral part. The halitosis is divided into genuine halitosis, pseudo halitosis and halitophobia. The genuine halitosis could be measured by object inspection and incurred by physiological and pathological reasons. The pseudo halitosis does not have the objective symptoms, it does not realized by other people but the person itself feels the smell. The halitophobia patients believe that they have the disgusting smell even after the treatment for genuine halitosis or pseudo halitosis. The study over the halitosis has been processed for a long time, but there has been no examination about the difference over the halitosis between the people who majored in dental hygiene and the others, so this study was started to make additional data about the halitosis.

학교구강보건시설 선호도에 관한 연구

양달님(Dal-Nim Yang),이혜진(Hye-Jin Lee),김민영(Min-Young Kim) 한국구강보건과학회 2016 한국구강보건과학회지 Vol.4 No.1

The oral health facilities of schools can be divided into the school of dental clinic and the tooth-brushing facilities, and the goal is to improve the oral health of children effectively in special-education schools as well as ordinary primary schools. Thus, the study over the oral health facilities of schools is being processed on the various points of view. In this study with the former ones, the survey toward the people dispatched to the school of dental clinic from the public health centers and the people in charge of the school of dental clinic and tooth-brushing facilities in primary schools, including special-education schools has been carried out to analyze their opinions over the oral health facilities of schools. The subjects of the survey are 190 people related to School Oral Health Facility in 17 public health centers nationwide, 288 people who manage the School Dental Clinic in primary schools and special schools and 82 people who operate the School Tooth Brushing Facilities in primary schools. As a result of analysis, the factors which affect the preference of School Oral Health Facility are the form of the workforce and the efficiency of the management and operation - the confidence interval is 95%. However, there is no similar factor over the survey toward School Tooth Brushing Facilities.

Effect of Family-Friendly Corporate culture on Organizational Commitment and Job Performance-Focus on ICT companies in Korea

Won-Hee Lee(이원희),Dal-Nim Yang(양달님) 한국컴퓨터정보학회 2019 韓國컴퓨터情報學會論文誌 Vol.24 No.11

본 연구는 한국 ICT기업들을 대상으로 가족친화적 기업문화가 조직몰입 및 직무성과에 어떠한 영향을 주는지를 살펴보고자 하는 실증연구이다. 따라서 본 연구는 한국 ICT 기업조직에서 가족친화적 기업환경이 조직몰입 및 직무성과에 어떠한 영향을 주는지 알아보고자 하는데 그 목적이 있다. 이를 위해 본 연구에서는 한국 ICT 기업의 종사자를 대상으로 가족친화적 기업문화의 내부요인들이 조직몰입과 직무성과에 어떠한 영향을 주는지를 실증분석 하였다. 본 연구의 실증분석결과 한국 ICT 기업 조직의 가족친화적 조직문화, 가족친화적 복지제도는 조직몰입에 긍정적인 영향을 미치는 것으로 나타났고 조직몰입은 직무성과에 긍정적인 영향을 미치는 것으로 나타났다. 하지만 본 연구에서 제시한 가설 중 가족친화적 근무환경은 조직몰입에 유의한 영향을 주지 않는 것으로 확인되었다. 이러한 결과는 형식적인 가족친화형 프로그램 보다는 경제적 보상이 따르는 가족친화적 복지제도를 더 선호하는 종사자들의 특성을 확인하였다. This study is an empirical study to examine how the family-friendly corporate culture affects organizational commitment and job performance for ICT companies in Korea. Therefore, the purpose of the study is to investigate the effects of family-friendly culture of ICT companies on the organizational commitment and job performance of their employees. To this end, the impacts of internal factors of family-friendly corporate culture on their organizational commitment and job performance of the employees of ICT companies in South Korean are empirically analyzed. And the findings of the empirical investigation are as follows: Family-friendly Organizational culture and Family-Friendly Welfare System have positive effects on the organizational commitment, and Organizational commitment, in return, has positive effects on the job performance. But the Family-friendly working environment is found to have NO significant effects on the Organizational commitment. These results confirm the characteristics of workers who prefer family-friendly welfare systems with economic rewards rather than formal family-friendly programs.

Outline of groundwater use in Korea

( Doo Houng Choi ),( Dal Nim Noh ),( Kyung Hwan Ahn ),( Chan Jin Lee ) 대한지질공학회 2014 대한지질공학회 학술발표회논문집 Vol.2014 No.1

Measurement of PM10 Concentration in One Dental Clinic

Su-Yeon Hwang,Dal-Nim Yang,권하정,Joo-Young Lee 대한예방치과학회 2014 International Journal of Clinical Preventive Denti Vol.10 No.4

Objective: This study was performed to investigate the particular matter of indoor air quality in dental clinic based on the legallyPM10 concentration indoor reference value 100 μm/m3, and the result will be presented to the regulation andmanagement. Methods: This study is aimed to investigate the indoor air quality in the waiting room and treatment office, using theDustmate for 7 hours, which had been set to work every 2 minutes an hour. The treatment office where dental personnelstays for a long period of time was measured, using the Dustmate for 24 hours, which had been set to work every 30 minutesan hour. Results: The dental institution measurement for each location, the 2 multiuse facilities didn't exceed the Standard Act criteria100 μm/m3. As a result of natural ventilation (morning treatment) and after the natural ventilation (afternoon treatment) by usingnatural ventilator during the lunch time, the standard concentration of PM10 has been reduced. After comparing thePM10 of treatment office and outdoor for 24 hours, both didn't exceed the indoor air quality standard level. Conclusion: The dental personnel needs to clean the dental clinic regularly, and it is required to systematically manage byregular cleaning, and the installing an air purifier. An appropriate response plan needs to be considered for the dustproblems.

서울 · 경기지역 치과 병 · 의원 환자의 민간치과의료보험에 대한 인식

이혜진(Hye-Jin Lee),김민영(Min-Young Kim),양달님(Dal-Nim Yang) 한국구강보건과학회 2018 한국구강보건과학회지 Vol.6 No.1

This study surveyed the recognition and insured rate of people who usually visit a dental clinic. The survey consulted over 540 people aged over 20 years old, through a self-ad-ministered questionnaire in 10 dentist s offices which consented to join the activity in Seoul City and Kyung-gi Province. The survey analyzed demographic, social and medical features. It used multi-nomial logit analysis to analyze the reasons that influence recognition of private dental insurance, and logit analysis to analyze the points which influence buying a private dental insurance plan, and the willingness of people who have not yet purchased private dental insurance to purchase a plan.

국제합작사업 참여기업 간 통제가 유대강도 및 합작성과에 미치는 영향에 관한 연구

이원희(Won-Hee Lee),양달님(Dal-Nim Yang) 한국컴퓨터정보학회 2020 한국컴퓨터정보학회 학술발표논문집 Vol.28 No.1

농업생산기반시설인 용수로와 배수로의 탄소발생량 분석

남귀숙 ( Gui Sook Nam ),지달님 ( Dal Nim Gee ),홍성구 ( Seng Gu Hong ),이규상 ( Gyu Sang Lee ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0

국내외 온실가스 감축을 포함한 탄소중립에 대한 관심이 고조되고 있는 현재, 정부는 2020년 10월 “2050 Net-Zero선언”을 통해 경제구조 저탄소화, 신유망 저탄소산업 생태계 조성, 탄소중립 사회로의 공정전환, 탄소중립 제도적 기반 강화를 “2050 탄소중립 추진전략”으로 설정하였고, 농식품부 또한 기후변화대응을 위해 논물관리, 화학비료 사용절감, 가축분뇨 처리시설 확충, 양질의 조사료 보급 등 기후변화대응 정책을 실천하고 있다. 국가 온실가스 배출량 중 농업분야는 축산부문(장내발효, 가축분뇨)과 경종부문(벼 재배, 농경지토양, 작물잔사소각)으로 구분하고 배출량을 관리하고 있다. 반면, 농업분야 온실가스 감축에 있어 저수지, 담수호, 수리시설물 등 농업생산기반시설에 대한 온실가스 배출계수에 대한 관심이 미흡하다. 따라서 본 연구에서는 공사가 관리하고 있는 농업생산기반시설의 온실가스 배출량을 측정하고 그에 따른 저감방안을 제시하여 농업분야의 탄소감축에 대응하고자 한다. 본 연구에서는 용배수로의 온실가스 배출량을 측정하기 위해 온실가스 포집을 위한 챔버를 제작하였다. 용배수로의 경우 안성에 소재하고 있는 금광저수지를 수혜구역으로 하였다. 농업용 용수로 중 콘크리트 용수로의 CH₄ flux는 7~9월 0.00~0.03 CH₄-kg/ha^-1/day^-1로 분석되었고, CO₂ flux는 7~9월 -0.36~-0.15 CO₂-kg/ha^-1/day^-1로 나타났다. 토공 용수로의 CH₄ flux는 7~9월 0.15~17.28 CH₄-kg/ha^-1/day^-1, CO₂ flux는 7~9월 -0.61~1.47 CO₂-kg/ha^-1/day^-1로 나타났다. 콘크리트 배수로의 CH₄ flux는 7~9월 -0.02~0.01 CH₄-kg/ha^-1/day^-1, CO₂ flux는 7~9월 -2.21~1.84 CO₂-kg/ha^-1/day^-1이다. 토공 배수로의 CH₄ flux는 0.82~1.02 CH₄-kg/ha^-1/day^-1, CO₂ flux는 2.01~2.56 CO₂-kg/ha^-1/day^-1이다. 농업용 용수로 중 콘크리트 용수로의 CO₂equivalent는 -0.07~0.43 CO₂eq-kg/ha^-1/day^-1이고, 토공 용수로는 2.51~271.92 CO₂eq-kg/ha^-1/day^-1로 나타났다. 농업용 배수로 중 콘크리트 배수로의 CO₂equivalent는 -0.60~0.62 CO₂eq-kg/ha^-1/day^-1이며, 토공 배수로는 13.45~16.73 CO₂eq-kg/ha^-1/day^-1로 나타났다. 이를 통해 콘크리트 용수로에서 7월부터 9월까지 배출되는 탄소는 60 ton이며, 토공 용수로는 12,000 ton, 콘크리트 배수로 -10 ton, 토공 배수로는 2,500 ton 정도로 총 15.05천 ton 정도 배출되는 것으로 추정할 수 있다.