고관절 주위 골절환자에서 술 전 색 도플러 초음파를 이용하여 진단한 심부 정맥 혈전의 빈도

정재훈,이경재,민병우,손은석,구태원,Jung, Jae-Hoon,Lee, Kyung-Jae,Min, Byung-Woo,Son, Eun-Seok,Koo, Tae-Won 대한정형외과초음파학회 2014 대한정형외과 초음파학회지 Vol.7 No.2

목적: 고관절 주위 골절 환자에서 술 전 색 도플러 초음파 검사를 이용하여 심부 정맥 혈전증을 진단하고 그 발생 빈도를 알아 보고자 하였다. 대상 및 방법: 2013년 6월부터 2014년 5월까지 본원에 내원한 고관절 주위 골절 환자 중 이전에 심부 정맥 혈전의 과거력이 없으며 술 전 색 도플러 초음파 검사에 동의한 환자 27예를 대상으로 하였으며 남자가 8예, 여자가 19예이었다. 평균 연령은 74.3세(41-87)였다. 고관절 주위 골절의 진단명은 대퇴 경부 골절 15예, 대퇴 전자간 골절 11예, 비구 골절이 1예였다. 모든 수술은 본원 내원 후 48시간 이내에 시행하는 것을 원칙으로 하였으며 내원 24시간 이내에 색 도플러 초음파 검사를 시행하였다. 결과: 심부 정맥 혈전은 총 6예(22.2%)에서 발견되었다. 이중 2예(7.4%)는 근위 심부 정맥 혈전이었고 4예(14.8%)는 원위 심부 정맥 혈전이었다. 심부 정맥 혈전 발생 군이 평균 79세(75-87), 발생하지 않은 환자 군이 평균 72세(65-86)로 유의하게 많았다(p=0.038). 결론: 고관절 주위 골절 환자에게 수술 이전 실시한 색 도플러 초음파 검사상 22.2%로 비교적 높은 빈도로 심부 정맥 혈전이 발견되었다. 고관절 주위 골절 환자에서 술 전 심부 정맥 혈전증에 대한 보다 적극적인 검사가 필요할 것으로 사료된다. Purpose: To evaluate the incidence of deep vein thrombosis (DVT) before hip fracture by duplex color Doppler ultrasonography. Materials and Methods: From June 2013 to May 2014, 27 patients who had agreed to perform color Doppler ultrasonography before hip fracture surgery were evaluated for the incidence of DVT. Patients who had history of DVT were excluded. Five patients were men and 19 patients were women. The mean age was 74.3 years old (41-87). There were 15 cases of femoral neck fracture, 11 cases of intertrochanteric fractures and one case of acetabular fracture. Surgical intervention underwent within 48 hours from admission and duplex color Doppler ultrasonography was carried out at the day of admission. Results: DVT occurred in six cases (22.2%). Four cases (14.8%) occurred in proximal deep vein and two cases (7.4%) occurred in distal deep vein. The mean period of immobilization was longer in patients who had DVT. But there was no significant difference. The mean age was 79 years old (75-87) in patients who had DVT and 72 years old (65-86) in patients who had not. There was significant difference (p=0.038). Conclusion: The incidence of DVT which was diagnosed by duplex color Doppler ultrasonography before hip fracture surgery was relatively high (22.2%). So it is necessary to undergo duplex color Doppler ultrasonography more aggressively to rule out DVT before hip fracture surgery.

플라스틱 기판을 이용한 고분자 청색 유기발광다이오드의 발광 특성

정재훈,문대규,Jung, Jae-Hoon,Moon, Dae-Gyu 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.9

We have fabricated blue phosphorescent organic light-emitting devices (OLEDs) on a plastic substrate. The solution coated poly (9-vinylcarbazole) (PVK) host doped with Bis (3,5-difluoro-2-(2-pyridyl)phenyl_(2-carboxypyridyl)irdium(III) (FIrPic) guest molecules was used as an hole transporting emission layer. The device structure was ITO/PVK:FIrpic (50 nm, xwt%)/TAZ 50 nm)/LiF (0.5 nm)/Al (100 nm). The concentration of FIrpic molecule was varied from 1 wt% to 10 wt%. The OLED on plastic substrate exhibited maximum current efficiency of 18 cd/A with 5 wt% FIrpic molecules were doped into the PVK layer.

상악전치부 심미에 대한 인식도 평가

정재훈,오상천,Jung Jae-Hoon,Oh Sang-Chun 대한치과보철학회 2003 대한치과보철학회지 Vol.41 No.5

Statement of problem : The beauty has a little different meaning according to a time, culture, and nation. Purpose : This study was undertaken to determine the Korean perception of the altered upper anterior dental esthetics including the lack of symmetry, the midline deviation, the gingival exposure, the inclination of incisal plane, the type of incisal plane, and the type of gingival line. Material and Method : 670 subjects were participated in this survey. A questionnaire accompanied by 12 sets of computer-manipulated images using 3D MAX 4.2 software was used to record the ranking of the geometric preference related to the anterior esthetic discrepancies in three or four degrees of alteration. The statistical significance of the differences between the groups was determined by a one-way ANOVA and a t-test. Results : The results obtained were as follows: 1) The Korean perception of the anterior dental esthetics according to the subjects' occupation, sex, and age was most affected by occupation. 2) The masked image emphasizing the dentition and lips appeared stranger than the non-masked image at the same alteration. 3) The lack of symmetry, which was expressed as a unilateral discoloration of the tooth, showed incongruity in any teeth of the anterior dentition. The incongruity was more severe as the degree occurred closer to the midline. 4) The deviation of midline was showed more severe strangeness as the degree of deviation increased. However, more than half of the subjects did not perceive a deviation of 5mm. 5) During smiling, the exposure of the upper gingiva showed more severe incongruity as the degree of gingival exposure increased. 77% of the subjects perceived strangeness at the gingival exposure of 4.5mm. 6) The inclination of the incisal plane appeared stranger as the degree of inclination increased. 62% of subjects perceived strangeness at the $7.5^{\circ}$ inclination of the incisal plane. 7) The type of incisal plane showed increasing strangeness in the order of convex/downward, straight/horizontal, and concave/upward. 80% of subjects perceived strangeness at concave/upward. 8) The type of gingival line was showed increasing incongruity in the order of the same, a little above, and a little under the zenith of the lateral incisor to the line joining the zenith of the central incisor and the canine. However, less than half the subjects did not perceive strangeness at any alteration of the gingival line. Conclusion : The Korean perception of the upper anterior dental esthetics was different to the westerner's perception in the some respects.

봉약침을 이용한 만성 좌둔 점액낭 치료에 대한 증례 보고

정재훈,홍서영,김융기,임형호,조현철,Jung, Jae-Hoon,Hong, Seo-Young,Kim, Yeung-Kee,Lim, Hyung-Ho,Cho, Hyun-Chol 척추신경추나의학회 2003 대한추나의학회지 Vol.4 No.1

Objectives : This report was performed to evaluate the treatment of acupuncture Therapy. Bee venom acupuncture Therapy, Herbal medication and Moxibustion In Chronic lschial bursitis. Methods : We treated 1 case of chronic Ischial Bursitis with acupuncture therapy, Bee Venom Acupuncture therapy, herbal medication and Moxibustion Results : After 8 weeks of acupuncture Therapy. Bee venom acupuncture Therapy, Herbal medication and Moxibustion. a remarkable improvenment was made for Chronic lschial bursitis. The patient couldn't feel painful swelling over the center of the buttock and down the back of the leg. Conclusion : Acupuncture Therapy, Bee venom acupuncture Therapy, Herbal medication and Moxibustion were effective In reducing the symptoms. We think that it need the further study and clinical trial for Chronic lschial bursitis.

식편압입의 발현에 관한 임상적 연구

정재훈,오상천,동진근,Jung, Jae-Hoon,Oh, Sang-Chun,Dong, Jin-Keun 대한치과보철학회 2000 대한치과보철학회지 Vol.38 No.1

The purpose of this study was to investigate the causes of food impaction and to explore solutions as well. For this study, 39 patients with food impaction were selected. 77 contact areas in these patients were investigated mobility, tightness of contact area, gingival index, plaque index, attachment loss, alveolar bone loss, proximal caries, marginal ridge distance and occlusal relationships. The results were as follows ; 1. Teeth without distal support were found to be the most frequent site of food impaction (41.6%). Food impaction was found to be more frequent in the upper teeth (65.2%) than the lower teeth (33.8%). 2. Food impaction was found in tight contact cases (71.4%). Alveolar bone loss was not found in the early stage of food impaction (83.1%) 3. The distance between the marginal ridges of food impaction sites (mean=0.48mm) was short-er than that of the control group. (mean=0.77mm) (p<0.001) 4. In 18.2% of the cases, proximal carries were found at the food impaction site. 5. Food impaction affected patient's occlusion with the following frequencies, cusp to marginal ridge relationship (72.7%), cusp to fossa relationship (3.9%) and stepped relationship (23.4%).

그래핀에 담지된 Fe₃O₄와 CuO 나노입자의 리튬이차전지 음극성능

정재훈,정동원,한상욱,김광현,오은석,Jeong, Jae-Hun,Jung, Dong-Won,Han, Sang-Wook,Kim, Kwang-Hyun,Oh, Eun-Suok 한국전기화학회 2011 한국전기화학회지 Vol.14 No.4

본 연구에서는 에틸렌글리콜을 사용한 polyol reduction 방법으로 나노크기의 $Fe_3O_4$와 CuO가 각각 그래핀에 분산된 $Fe_3O_4$/graphene, CuO/graphene 복합체를 합성하였으며, 이를 리튬이차전지의 음극활물질로 사용한 전극의 성능을 평가하였다. 합성된 복합체의 물리적 특성은 SEM, XRD, TGA 등으로 분석하였으며, 반쪽전지를 제조하여 충/방전, cyclic voltammetry, 교류 임피던스 등의 전기화학적 특성평가를 수행하였다. 그래핀 표면에 분산된 금속산화물 나노입자들에 의한 용량증가 및 전기적 네트워크 향상 등의 효과로 $Fe_3O_4$/graphene 및 CuO/graphene 복합체의 전극성능이 그래핀 전극보다 우수하였다. 복합체의 경우 30회 충/방전 후에도 600 mAh/g 용량을 유지하였다. In this study, $Fe_3O_4$/graphene and CuO/graphene composites were synthesized by the polyol reduction method using ethylene glycol, and their performances as the anodes of lithium ion batteries were evaluated. The physical characteristics of the synthesized composites were analyzed by SEM, XRD, and TGA. In addition, their electrochemical properties were examined by the electrochemical analysis techniques such as charge/discharge performance, cyclic voltammetry, and AC impedance spectroscopy. The cells composed of $Fe_3O_4$/graphene and CuO/graphene composites showed better performance than the graphene electrode, due to the dispersion of nanosized $Fe_3O_4$ or CuO on the surface of graphene and the formation of good electrical network in the electrode. Their composites kept the reversible capacity more than 600 mAh/g even after the charging/discharging of 30 cycles.

급성 아토피 피부염 마우스 모델에서 한약조합약물의 염증반응 진정효과

정재훈,김경준,Jung, Jae-Hoon,Kim, Gyung-Jun 대한한방안이비인후피부과학회 2015 한방안이비인후피부과학회지 Vol.28 No.1

Object : The object of this study was effected of composed of 4 herbal medicines(Rubus coreanus, Rehmanniae Radix, Houttuynia cordata, Betulae cortex) on acute atopic dermatitis mice. Methods : BALB/c mice were divided 4 groups ; normal group, negative control group of acute atopic dermatitis mice induced by DNCB, treated apply to the back skin with the herbal medicine group, and treated orally with herbal medicine group. Treated with herbal medicine and DNCB during 2 weeks. After treated, measured WBCs, RBCs, and platelet in the blood, and analysed mRNA expression of spleen. Result : Composed herbal medicines could reduce WBCs, lymphocytes, monocytes, neutrophils, and eosinophils in the mouse blood. And, could down TNF-${\alpha}$ levels in spleen. In the skin tissue histology results, herbal medicines reduce the cells and T cells. Conclusion : Composed herbal medicines help to another inflammatory disease because they reduce the cells and T cells in the skin tissues. And they have inhibitory effects of TNF-${\alpha}$ mRNA expression, and Th 2 immune responses. Therefore herbal medicines use for an acute atopic dermatitis treatment.

『대학연의(大學衍義)』와 조선의 정치사상

정재훈 ( Jung Jae Hhoon ) 한국사상사학회 2020 韓國思想史學 Vol.0 No.64

중국의 남송시대에 진덕수가 지은『대학연의』는 주희의 정치사상을 계승한 성리학적 이상이 담긴 제왕학의 교본이다. 원, 명, 청대를 거치면서 제왕의 정치사상에 깊은 영향을 준 이 책은 고려 말 한국으로 전래된 이후 조선시대의 정치사상에도 많은 영향을 끼쳤다. 조선전기에는 현실의 정치에서 중요하게 참고되는 기준이 되는 책으로서 인용이 많이 되었다. 특히 『대학연의』에서 주목된 것은 왕조운영에 적합한 제왕학의 모델이었다. 그것은 현실적으로 신하들과의 관계, 궁중 내부의 비빈과의 관계, 환관 등에 대한 경계에 대한 풍부한 사례 등의 구체적인 역사적 사례가 대상이 될 수 있었다. 이 점은 원대나 명대에서 『대학연의』가 주목되었던 맥락과 다르지 않았다고 볼 수 있다. 이러한 적극적인 활용의 결과 『대학연의집략(大學衍義輯略)』과 같이 『대학연의』의 사실과 고려사의 사실을 덧붙여서 만든 책이 출현하기도 했고, 『치평요람(治平要覽)』과 같이 치국, 평천하의 영역을 보완하려는 책도 등장하였다. 조선중기에는 조선전기 체제에 대한 총체적인 반성 위에서 새로운 국가운영 원리를 모색하려는 사림들이 등장하였다. 이들은 『대학』에 대한 이론적 탐색을 심화하였고, 그 결과 이언적은 『중용구경연의(中庸九經衍義)』에서 『대학연의』의 군주수양론을 보다 정밀하게 구체화하였다. 이이는 『성학집요(聖學輯要)』에서 『대학연의』의 내용을 완전하게 해체해서 치국, 평천하의 영역까지 포괄하여 조선에 맞는 제왕학으로 재구성 하였다. 이는 사림들의 붕당정치가 가능하게 하는 이론적 전제가 되었다. 조선후기에는 성리학적 경세론이나 제왕학에서 어느 정도 벗어나는 노력이 나타났다. 당쟁이 치열해지면서 『서경』을 통해 국왕의 왕권을 강조하는 『홍범연의(洪範衍義)』가 출현하기도 하였고, 정조(正祖)는 『대학유의(大學類義)』를 통해 국왕이 직접 경세의 영역을 주도하는 질서를 추구하기도 하였다. 19세기의 세도정치시기에도 권상신이 지은 『국조대학연의(國朝大學衍義)』와 같이 중국의 제왕 사례가 아니라 조선의 국왕의 사례로써 완전히 내용을 바꾼 조선판 『대학연의』가 출현하였다. 이와같이 『대학연의』는 조선의 정치사상의 변화에 큰 영향을 미치면서 그 논리는 조선에서 완전하게 변용되거나 새롭게 이해됨으로써 조선의 정치사상을 이해하는 하나의 지표로서 파악할 수 있다. Daehak Yeoneui was written by Jin Deok-su(陳德秀) of the Southern Song dynasty and has been regarded for centuries as the ultimate guidebook to ideal monarchy, as it contains Neo-Confucian ideals first conceived by Ju Hi(朱熹). This book continued to inspire many rulers (and their political philosophies) during the Yuan, Ming and Qing periods, and it was also introduced to the Korean peninsula at the end of Goryeo period to have a huge impact on Choson’s political philosophy as well. In the early half of the Choson period, this book was often cited as an important standard to be cherished in real life politics. What Daehak Yeoneui essentially presented was an ideal model for the governance of the monarchs who had to rule entire countries. And the book contained numerous examples of past kings’ relationships with his vassals, his queens and concubines, and eunuchs (which attracted Yuan and Ming monarchs’ attention as well). The book’s natural fame led to publications of similar materials such as Daehak Yeoneui Jib’ryak(大學衍義輯略), which added historical facts of the Goryeo period to the original Daehak Yeoneui, or Chipyeong Yoram(治平要覽), which was created to guide the Choson kings in their ruling of the country and pacifying bigger planes. Then, in the middle period of Choson, the Sarim figures appeared and began searching for a new set of principles to run the Choson dynasty, based on a fairly critical take on how things went earlier in Choson. They studied Daehak much more profoundly and in a more academic fashion. As a result, for example, Yi Eon-jeok meticulously analyzed the argument of “Rulers should vigorously build their character” [featured in Daehak Yeoneui] in his Jung’yong Gu’gyeong Yeoneui(中庸九經衍義), and Yi Ih, in his Seonghak Jibyo(聖學輯要)’ completely dismantled and then recomposed all the contents of Daehak Yeoneui and even add other issues such as “Chiguk(Rule the country)” and “Pyeongcheonha(Pacify the universe),” to compile yet another form of ‘Principles for Monarchy(or Monarch studies)’ which would fit the reality of Choson nicely. And most importantly, these efforts were what enabled the Bungdang Party politics to prevail and blossom in this period. In later periods, emerged were some efforts that tried to break free from Neo-Confucian dynasty-governing theories or monarchy studies. With party collisions heating up, arguments in favor of the monarch’s absolute authority (based on Seogyeong) were suggested through books such as Hongbeom Yeoneui(洪範衍義), and King Jeongjo(正祖) himself authored Daehak Yu’eui(大學類義) to emphasize his own role in leading the agenda of world governing. Even during the “Sedo politics” period (during which powerful houses controlled the Choson political arena) in the 19th century, published were books like Gwon Sang-shin’s Gukjo Daehak Yeoneui, which was essentially a Choson version of Daehak Yeoneui, filled with not Chinese but Choson kings’ examples. As we can see, while Daehak Yeoneui heavily affected changes in the Choson politicians’ political philosophy, the Choson people also managed to understand it from an entirely different angle. In other words, Choson’s view on Daehak Yeoneui lets us understand the nature of Choson’s political philosophy and its evolution.

로드헤더 장비사양 검토 및 굴착효율 예측 모델 개발

정재훈,임주휘,이재원,강한별,김도훈,신영진,Jae Hoon Jung,Ju Hyi Yim,Jae Won Lee,Han Byul Kang,Do Hoon Kim,Young Jin Shin 한국터널지하공간학회 2023 한국터널지하공간학회논문집 Vol.25 No.3

The use of roadheaders has been increasing to mitigate the problems of noise and vibration during tunneling operations in urban area. Since lack of experience of roadheader for hard rock, the selection of appropriate machines and the evaluation of cutting rates have been challenging. Currently, empirical models developed overseas are commonly used to evaluate cutting rates, but their effectiveness has not been verified for domestic rocks. In this paper, a comprehensive literature review was conducted to assess the rock cutting force, cutterhead capacity, and cutting rate to select the appropriate machine and evaluate its performance. The cutterhead capacity was reviewed based on the literature results for the site. Furthermore, a new empirical model and simplified method for predicting cutting rates were proposed through data analysis in relation to operation time and rock strength, and compared with those of the conventional model from the manufacturer. The results show good agreement for high strength range upper 80 MPa of uniaxial compressive strength.

혁신형 중소기업의 조직혁신역량이 기업의 수출성과에 미치는 영향

정재훈,오가영,Jung, Jae Hoon,Oh, Ka Young 강원대학교 경영경제연구소 2022 Asia-Pacific Journal of Business Vol.13 No.3

Purpose - This study investigate the effect of innovative capacity on corporate export performance and moderating flexibility. Design/methodology/approach - For this, hypotheses were established by reviewing previous studies and an empirical analysis was conducted for testing. Using SPSS 22.0, a frequency analysis of related variables was conducted. Through an exploratory factor analysis, validity and reliability tests of measuring tools were conducted and a descriptive statistics was analyzed for collected data result and hypotheses testing. Findings - Finally, with a verified model, the hypotheses and the moderating effects were tested. The results are as follows; The innovationa capacities have a positive effect on export performance and flexibility However, the flexbilitiy was not moderator in the relationship between innovative capacity and export performance. Research implications or Originality - According to the results above, this study presents directions to improve export performance of technological innovative type SMEs. The innovative capabilities, marketing capacity, organization innovative capacity and process innovative capactity, has an positive effect on