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CASE REPORT : Pulmonary Foreign Body Granulomatosis in Dental Technician
( Sung Jun Chung ),( Gun Woo Koo ),( Dong Won Park ),( Hyun Jung Kwak ),( Ji Young Yhi ),( Ji Yong Moon ),( Sang Heon Kim ),( Jang Won Sohn ),( Ho Joo Yoon ),( Dong Ho Shin ),( Sung Soo Park ),( Ju Ye 대한결핵 및 호흡기학회 2015 Tuberculosis and Respiratory Diseases Vol.78 No.4
Occupational lung diseases are caused by several toxic substances including heavy metals; however, the exact pathologic mechanisms remain unknown. In the workplace, dental technicians are often exposed to heavy metals such as cobalt, nickel, or beryllium and occasionally develop occupational lung diseases. We described a case of occupational lung disease in a patient who was employed as a dental technician for over a decade. A 31-year-old, non-smoking woman presented with productive cough and shortness of breath of several weeks duration. Chest computed tomography revealed a large number of scattered, bilateral small pulmonary nodules throughout the lung field, and multiple mediastinal lymph nodes enlargement. Percutaneous needle biopsy showed multifocal small granulomas with foreign body type giant cells suggestive of heavy metals inhalation. The patient’s condition improved on simple avoidance strategy for several months. This case highlighted the importance of proper workplace safety.
Fast Even-Odd Transforms by the Conversion Matrices
Kwak, Hoon Sung,Kim, Hwan Yong,Chung, Sung Jung,Shin, Gun Sun 전북대학교 공업기술연구소 1985 工學硏究 Vol.16 No.-
패턴인식에 있어서 특징추출 등에 사용되는 KLT는 가장 최적한 변환으로 알려져 있으나 고속 계산 알고리즘을 구하기 어려운 단점 때문에 준 최적의 변환(DCT, DST-Ⅰ, DST-Ⅱ, CMT, ST 등) 들을 이용하고 있다. 본 연구에서는 Hein 등이 WHT를 DCT에 적용했던 방법을 다른 변환에도 적용시켜 고찰하였다. 적용되는 변환은 기수와 우수벡터를 가지는 EOT 변환으로서 WHT를 적용할 경우 얻어지는 변환 메트릭스를 구하는데 중점을 두었다. 그래서 EOT 변환을 할 경우 변환 메트릭스를 통하여 변환하면 원래의 변환 방법보다 계산속도를 향상 시킬 수 있음을 제시하였으며 다른 고속계산 알고리즘 방법들과도 비교하였다. 또, 변환 메트릭스를 통한 EOT 변화과정을 호름선도로 나타내었고 이들에 대한 성능을 측정하여 비교하므로서 변환들의 특성을 파악하였다.
Segmental Prevalence and Extraction Rate of Retained Intrahepatic Stone
Kwak, Byung Kook,Lee, Jong Beum,Joo, Sang Shin,Lee, Hwa Yeon,Shim, Hyung Jin,Kim, Kun Sang,Lee, Yong Chul 중앙대학교 의과대학 의과학연구소 1996 中央醫大誌 Vol.21 No.2
간내 잔류담석의 간 구역별 빈도와 제거율과 실패원일을 알고자 한다. 담석증으로 수술을 받고 T자관을 통하여 잔류담석 제거술을 시행 받은 환자중 간내담도에 잔류담석이 있던 126명을 후향적으로 담도조영사진을 분석하였다. 간내담도별 잔류 단석의 빈도와 제거율은 좌외측(left lateral)이 각각 54.0%, 91.1% ; 우후(right posterior)가 38.1%, 81.2% ; 우전(right anterion)이 26.2%, 93.8% ; 좌 내측(left medial)이 14.3%, 77.7%를 보였다. 전체 제거율은 85.6%이었다. 미상엽은 모든 예에서 간내 담석이 없었다. 제거 실패의 주된 원인은 담도 협착과 매복된 담석이었다. 우후와 좌내측 간내담도에서는 고유한 담도의 굴곡이 또 하나의 실패의 주된 원인이었다. 결론적으로 좌외측 간내담도가 담석의 빈도가 가장 높고 우후, 우전, 좌내측 간내담도의 순서로 높았다. 우후와 좌내측 간내담도의 담석제거율이 우전, 좌외측 보다 낮았으며, 이것은 고유한 굴곡 대문으로 설명된다. To evaluate the hepatic segmental prevalence and the extraction rate of the retained intrahepatic stones on cholangiogram and the cause of failure of percutaneous stone removal through a T-tube tract. One hundred and twenty-six patients who had undergone the extraction of the retained intrahepatic stones were evaluated. Selective segmental cholangiogrmas were obtained for each segmental prevalence by using a pre-shaped 10F catheter. The results of the segmental extraction rate and the cause of failure were also evaluated after completing the stone removal session. The segmental prevalence and the extraction rate were 54.0% and 91.1% in the left lateral(LL), 38.1% and 81.2% in the right posterior(RP), 26.2% and 93.8% in the right anterior(RA), 14.3% and 77.7% in the left medial(LM) segmental duct, respectively. The total extraction rate was 85.6%. The caudate lobe had no stone in all cases. The main causes of extraction failure were stricture and stone impaction. In the RP and the LM segmental duct, duct angulation was another amin cause of failure. The prevalence of retained stones is highest in the LL segmental duct, the RP, the RA and the LM segmental duct, in descending order. There was no stone in the caudate lobe. The extraction in the RP and LM segmental ducts is more difficult than in the RA and LL segmental ducts. This result can be explained by the natural anatomical angulation of these ducts.
A 16-Year Single Center Experience of Resected 2029 Pancreatic Ductal Adenocarcinoma
Sang Hyun Shin,Song Cheol Kim,Dae Wook Hwang,Ki Byung Song,Jae Hoon Lee,Bong Jun Kwak,Seong-Ryong Kim,Jaewoo Kwon,Chung Hyeun Ma,Seunghyun Hwang,Kwang-Min Park,Young-Joo Lee 대한외과학회 2016 대한외과학회 학술대회 초록집 Vol.2016 No.11
Relevance between Marketing Route of Social Media and Consumer Age Group for Choosing Dental Clinics
( Shin-young Lee ),( Mi-gyeong Kwak ),( Mi-jeong Kim ),( Jung-hwa Song ),( Young-ju Lee ),( Hye-ju Hong ),( Sang-hwan Oh ) 한국치위생과학회 2021 치위생과학회지 Vol.21 No.4
Background: The purpose of the study was to evaluate the relationship and route of dental Social Media marketing by age group and support effective dental marketingy by age group. Methods: A study was conducted on 265 people, aged 20 to 64 years, who lived in Seoul, Gyeonggi area and regularly used one or more of the social media platforms, Naver Band, Facebook, Instagram, KakaoStory, Twitter, or YouTube more than once a day. A 27-question questionnaire survey of approximately 10 minutes was conducted, and the collected data was statistically analyzed using the PASW program, with the significane level set to 0.05. Results: “Introduction of acquaintances” was the most common route to visit the dentist. Regarding the use of social media platforms based on age group, ‘Instagram’ had the highest frequency among people belonging to the age groups of 20 to 29 years and 30 to 39 years; ‘YouTube’ had the highest frequency among those aged 40 to 49 years; and ‘Naver Band’ had the highest frequency among those aged 50 to 65 years. Conclusion: The most frequently used social media by consumers according to age included Facebook, YouTube, and Instagram. However, social media was found to have no significant impact on the choice of dental institutions, as the number of people who visited the dentist through “Introduction of acquaintances” was the highest, and “Introduction of acquaintances” did not have experience accessing the dentist site after dental marketing. If this study could provide customized marketing information for each age group through social media, it is expected that the marketing effect of dental institutions through social media would be maximized in the future.
Significance of Non-erosive Minimal Esophageal Lesions in Gastro-esophageal Reflux Disorder
( Sung Pyo Hong ),( Pil Won Park ),( Seong Gyu Hwang ),( Kwang Hyun Ko ),( Sun Young Kwak ),( Se Hyun Kim ),( Kye Sook Kwon ),( Yong Woon Shin ),( Ji Kon Ryu ),( Kwang Hyun Ryu ),( Sang Jong Park ),( 대한내과학회 2004 The Korean Journal of Internal Medicine Vol.19 No.2
Shin Young Kim,Hyun Soo Park,권하얀,Hyun-Joo Seol,배진곤,Ki-Hoon Ahn,Sunghun Na,Se Jin Lee,Mi Young Lee,Seung Mi Lee,Dong Wook Kwak,Jung Yoon Park,박인양,원혜성,Moon Young Kim,고현선,Han-Sung Hwang,Korean Society of 대한의학회 2020 Journal of Korean medical science Vol.35 No.11
Background: This study aimed to evaluate the effect of cervical cerclage on the recurrence risk for preterm birth in singleton pregnant women after a twin spontaneous preterm birth (sPTB). Methods: This multicenter retrospective cohort study included women who had a singleton pregnancy from January 2009 to December 2018 at 10 referral hospitals and a twin sPTB before the current pregnancy. We compared the cervical lengths during pregnancy and pregnancy outcomes, according to the placement of prophylactic or emergency cerclage. We evaluated the independent risk factors for sPTB (< 37 weeks of gestation) in a subsequent singleton pregnancy. Results: For the index singleton pregnancy, preterm birth occurred in seven (11.1%) of 63 women. There was no significant difference in the cervical lengths during pregnancy in women with and without cerclage. In a multivariate logistic regression analysis, the placement of emergency cerclage was an independent risk factor for subsequent singleton preterm birth (odds ratio [OR], 93.188; 95% confidence interval [CI], 1.633–5,316.628; P = 0.027); however, the placement of prophylactic cerclage (OR, 19.264; 95% CI, 0.915–405.786; P = 0.057) was not a factor. None of the women who received prophylactic cerclage delivered before 35 weeks' gestation in the index singleton pregnancy. Conclusion: Cerclage did not lower the risk of preterm birth in a subsequent singleton pregnancy after a twin sPTB. However, emergency cerclage was an independent risk factor for preterm birth and there was no preterm birth before 35 weeks' gestation in the prophylactic cerclage group. Therefore, close monitoring of the cervical length and prophylactic cerclage might be considered in women who have experienced a twin sPTB at extreme gestation.