하사근기능항진 환자에서 하사근절제술의 효과 분석

박주현,강신희,최동규,Joo Hyun Park,MD,Shin Hee Kang,MD,Dong Gyu Choi,MD,PhD 대한안과학회 2011 대한안과학회지 Vol.52 No.1

Purpose: To investigate the effect of inferior oblique (IO) myectomy by analyzing the correlation of the amount of inferior oblique overaction (IOOA), hypertropia and excyclotorsion before, between, and after IO myectomy in patients with various degrees of IOOA. Methods: A total of 86 eyes from 59 patients with IOOA who underwent IO myectomy were enrolled in the present study. The correlation analysis was performed for the amount of IOOA, hypertropia and excyclotorsion before and after surgery, according to the preoperative amount of IOOA, hypertropia, and excyclotorsion. Results: The IOOA decreased from +2.5 ± 0.6 before surgery to -0.01 ± 0.25 (p < 0.05) after surgery. The vertical deviation was 5.7 ± 6.3 prism diopter (PD) and 2.3 ± 5.2 PD (p < 0.05) postoperatively. The amount of cyclodeviation was 15.3 ± 7.6° before surgery and 6.6 ± 5.7° (p < 0.05) after surgery. The amount of surgical correction for IOOA and the hypertropia was significantly correlated with preoperative deviation (p < 0.05, p < 0.05). The amount of excyclotorsion before and after surgery was also positively correlated but was not statistically significant (p = 0.05). Conclusions: IO myectomy can correct any degree of IOOA, hypertropia, and related excyclotorsion. J Korean Ophthalmol Soc 2011;52(1):67-73

형우(螢右) 함유(含有) 슬래그 노이(盧理)를 통한 PCB 스크랩으로부터 Au, Ag, Ni의 회수(回收)에 관한 연구(班究)

박주현,Park, Joo-Hyun 한국자원리싸이클링학회 2011 資源 리싸이클링 Vol.20 No.4

고온에서 PCB 처리를 통한 Au, Ag와 같은 귀금속뿐 아니라 Ni과 같은 주요 회유금속을 회수하기 위한 기초연구로서 CaO-$Al_2O_3$(-$SiO_2$) 및 CaO-$SiO_2$-$CaF_2$ 슬래그를 이용하여 Au, Ag, Ni의 회수거동올 관찰하였다. 슬래그 투입 없이 PCB만으로 용융실험을 수행한 결과 PCB는 거의 용융되지 않았으며, 이로부터 유도전류를 이용한 용융을 촉진할 뿐 아니라 유가금속의 회수를 위해서는 Cu와 갇은 적절한 base metal이 필요함을 확인하였다. 본 연구결과, PCB/Cu ratio는 1 이하가 바람직할 것으로 생각된다. CaO-$Al_2O_3$(-$SiO_2$) 및 CaO-$SiO_2$-$CaF_2$ 슬래그를 투입한 결과, $CaF_2$를 함유하는 fluorosilicate계 슬래그가 calcium aluminate계 슬래그보다 융점과 점도가 낮게 제어되었으며, 이로부터 Au, Ag, Ni의 높은 분배비를 얻을 수 있었다. 점도가 낮은 $CaF_2$ 함유 슬래그 적용 시 높은 유가금속 회수율은 슬래그 내에서 각 금속입자의 등속침강속도가 상승하기 때문인 것으로 평가되었다. Recovery of novel metals such as Au, Ag and Ni from wastes PCB was investigated by slag treatments. The CaO-$Al_2O_3$(-$SiO_2$) and CaO-$SiO_2$-$CaF_2$ slags were employed in the present study. The PCB/Cu ratio is recommended to be lower than unity. The use of CaO-$SiO_2$-$CaF_2$ slag provided the more higher yield of Au, Ag and Ni than the CaO-$Al_2O_3$(-$SiO_2$) slag did, which was mainly due to the lower melting point and the viscosity of $CaF_2$-containing slag. The terminal descending velocity of metal droplets in the slag phase increased with decreasing slag viscosity.

Metastatic Hepatocellular Carcinoma to the Distal Phalanx: a Case Report and Review of Literature

박주현,이정권,정다은,안수민,이경민,김보경,Park, Joo-Hyun,Lee, Jung-Kwon,Jung, Da-Eun,Ahn, Soo-Min,Lee, Kyung-Min,Kim, Bo-Kyoung Korean Society for Hospice and Palliative Care 2012 한국호스피스.완화의료학회지 Vol.15 No.2

손으로의 전이성 암은 드문 질환으로 환자를 진료함에 있어 간과되기 쉽다. 간세포성 암종 환자에서 손으로의 전이는 지금까지 전세계적으로 5예가 보고되고 있으며, 이 논문에서는 간세포성 암종의 우측 4번째 손가락으로의 전이를 보고하고자 한다. 환자는 통증과 부종을 호소하였으며 보존적 치료에도 증상이 점차 악화되어 절단 수술을 받고 증상이 호전되었다. 이 보고는 진료의사들이 암환자의 손에 병변이 관찰될 때 전이성 암의 가능성을 염두에 두고 접근하여 증상 조절을 해야 한다는 것을 시사한다. Metastatic tumors to the hand are rare and often overlooked by clinicians. Here, we report a rare case of phalangeal metastasis of right 4th finger in a patient with hepatocellular carcinoma. Treatment was given with right 4th finger disarticulation. This report suggests that physicians must take consideration into the possibility of metastatic tumors in patients with bone lesions on hands and a history of malignancy.

린 건설과 연계한 생산성 저하 요인과 Waste 요인과의 상호 관련성 연구

박주현,김대영,이학기,Park Joo-Hyun,Kim Dae-Young,Lee Hak-Ki 한국건설관리학회 2003 건설관리 : 한국건설관리학회 학회지 Vol.4 No.4

생산성은 프로젝트를 관리하는데 있어서 효율성을 측정하는 중요한 지표이다 또한 건설 생산성은 비용 및 일정과 연관성이 있을 뿐만 아니라 프로젝트의 성공 여부와도 관련이 크다. 프로젝트에서 생산성의 중요성에도 불구하고 국내에서의 생산성 관련 연구는 생산성에 대한 기본 개념 및 원칙에 관한 기초적인 연구 없이 정량적인 연구에 집중되어 있으며, 관련 데이터 수도 적은 실정이다. 국내 건설 공사의 생산성을 향상시키기 위해서는 생산성 관리의 정량적친 요인뿐만 아니라, 정성적인 요인까지 관리해야 하며, 저하요인에 따른 체계적이고 세부적인 프로세스 및 기법이 제시되어야 한다 이에 국내 건설 공사의 생산성 관리에 린 건설을 도입하고자 한다. 본 연구에서는 국내 생산성 저하요인과 린 건설에서의 Waste 요인과의 상관관계 분석을 통해 국내 건설 공사 현장에서의 Waste 주요 의미를 살펴보고 두 요인간의 상호 관련성을 파악하여, 린 건설의 프로세스 및 기법을 국내 건설 공사 현장에 적용하기 위한 이론적인 근거를 제공하고자 한다.

‘공유된’ 과거와 ‘소수자’ 다루기

朴珠鉉(Park, Joo-Hyun),陳在管(Chin, Jae-Gwan) 역사교육연구회 2013 역사교육 Vol.128 No.-

This study intended to examine the ways in which a range of approaches to national identity in history education deal with the issue of cultural diversity and ‘shared’ history. First, attention is paid to the question of how to mainstream minority history by illustrating the examples of curriculum changes and innovative approaches to teaching and learning history in the UK. Second, this study aimed to explore how the disciplined ‘conversation’ of historical study can get teachers talking across the divide by drawing on the main challenges at the root of constructing a lesson sequence and resources on the Ottoman period in Cyprus in one of AHDR(Association for Historical Dialogue and Research) project. In conclusion, some suggestions for the design of more representative curriculum and more inclusive teaching approaches to ‘minority’ history can be summarised as follow: Most of all, it is important to note that teaching multi-ethnic history without tokenism can help students reflect on the issue of whose story has been ‘hidden from history’, thus leading to bring in the question of historiography. Bearing the main findings of the AHDR project, it is also worth noting that students who can problematise the very idea of any monolithic narrative of the period would wrestle with the task of constructing historical accounts from a diversity of competing stories by exploring varied perspective in the light of sources in question.

親生關係 證明에 있어서의 DNA 鑑定의 限界

박주현(Joo Hyun Park) 한국가족법학회 2005 가족법연구 Vol.19 No.2

DNA paternity testing is the most advanced and accurate method available for resolving parentage for medical, legal or personal reasons. It is even believed to be an absolutely perfect tool, which can discover the truth in any circumstances. Courts generally accept DNA paternity test results. However there are limits in the DNA paternity testing. It cannot successfully give a clear answer to the question, "Is he a biological father to the plaintiff". It only shows a probability that he might be. If we know the distribution of given alleles in a certain population, we can solve parternity indices or paternity probabilities on the premise that all the alleles tested are independent to one another under Hardy-Weinberg's equilibrium. If the allele distribution of any sub-population group is entirely different from that of a certain population, it is possible that the paternity index might be either under- or over-estimated. We couldn't calculate these indices or probabilities in difficult trials such as fatherless or motherless cases. In these cases, judges should confirm other collateral evidences and impose specified premises on these testings. Nevertheless our judges can not play any role in these testing, because they have no information about testing experts and their laboratory facilities in Korea. Therefore it is mandatory to set up a database concerning these issues. These information will help not only judges but also lawyers in paternity trials.

영어의 /r/과 모임

박주현(Park Joo-Hyun) 한국중원언어학회 2003 언어학연구 Vol.- No.7

The /r/ is the most controversial of all the consonants in English. The history of its development accounts for the many variations we find. Earlier /r/ was a trilled sound, then a fricative sound, both clearly consonantal in acoustic value. During the seventeenth century, the consonantal aspects of the sound seem to have weakened and the sound became more and more vocalic, so that today it closely approximates a vowel. This paper aims to examine closely the relation between /r/ and vowels. In other words, it attempts to investigate the effect of /r/ on preceding vowel sounds, and establish the R vowel system in English. Accents of English can be labeled either 'rhotic' and 'non-rhotic' according to whether Irl is pronounced in final and preconsonantal position or not. Typically, RP is non-rhotic and GA is rhotic. We could find that there is no fundamental difference between general vowels and R vowels. Vowels are pronounced according to a special variation of the system of long and short vowels. Briefly, what has happened is that short vowels have coalesced with a following /r/ to produce new varieties of long vowel, while long vowels have developed a shwa glide from the vowel to /r/, and this has replaced the /r/ itself. All varieties of English have taken part in this change to some extent, and the differences among dialects concern the degree to which it has been effected. In rhotic English something of a consonantal Irl remains after a vowel; in non-rhotic English this /r/ has completely disappeared. In conclusion, English R vowels are as follows: ?:(r), ?:(r), ?:>:(r), ??(r), i?(r), u?(r), ?i?(r), ?u?(r), ?(r).

영어의 등시간격성

박주현(Park Joo-Hyun) 한국중원언어학회 2000 언어학연구 Vol.- No.4

ELS(주가연계증권) 투자행동과 보유유형 분석: 원금보장여부에 따른 보유유형 비교

박주현 ( Joo-hyun Park ),차경욱 ( Kyung-wook Cha ) 한국소비자학회 2017 소비자학연구 Vol.28 No.2

본 연구에서는 ELS 투자자의 투자행동 특성을 파악하고, ELS 보유유형(원금보장형, 원금비보장형)에 따라 투자행동 특성, 사회·경제적, 재무적 특성을 비교하며, ELS 보유유형 결정에 영향을 미치는 요인을 분석하였다. 본인명의로 ELS를 보유하고 있는 20대 이상 성인남녀를 대상으로 온라인 설문조사를 시행하였고, 총 336부의 자료를 최종 분석에 사용하였다. 본 연구의 주요 결과는 다음과 같다. 첫째, 조사대상자들은 1인당 평균 1.44개의 ELS상품을 보유하고 있었고, ELS의 유형은 원금보장형 48.6%, 원금비보장형 51.4%로 나타났다. ELS 상품 1개당 투자금액은 평균 3,024만원이었고, 기대수익률은 평균 15.6%이었다. 최초로 ELS에 투자한 시점부터 현재까지의 기간은 평균 3.63년이었고, 조사대상자의 53.3%는 과거 ELS에 투자한 경험이 있었다. ELS에 대한 이해도를 0-12점으로 측정한 결과, 평균 5.37점으로 낮은 수준이었다. 둘째, 조사대상자들이 현재 보유하고 있는 ELS에 대한 평균 기대수익률은 과거 ELS를 투자를 통해 얻은 평균수익률 보다 높았다. 특히 원금비보장형 ELS를 보유한 집단은 과거 투자수익률(12.8%)에 비해 현재 보유한 ELS에 대한 기대수익률(28.8%)이 매우 높게 나타났다. 셋째, 원금비보장형 ELS를 보유한 집단은 증권사에서 가입한 상품이 많았고, 원금보장형 ELS만 보유한 집단에 비해 기대수익률이 높았으며, 투자기간이 길었고, 과거 ELS 투자경험이 많았으며, ELS에 대한 이해도도 상대적으로 높았다. 넷째, 원금비보장형 ELS를 보유하고 있는 집단은 원금보장형 ELS만 보유한 집단 보다 금융자산 총액과 금융투자자산 보유액이 유의하게 많았고, 안전금융자산에 비해 금융투자자산의 비중이 높았다. 또한 감수하고자 하는 투자손실률이 높았으며, 위험추구형 투자성향을 보여주었다. 다섯째, 로지스틱 회귀분석 결과에 따르면, ELS에 투자해 온 기간이 길수록, ELS에 대한 기대수익률이 높을수록, ELS 이해도 수준이 높을수록, 손실에 대한 위험감수정도가 클수록, 투자성향이 위험추구형일수록 원금보장형 ELS만 보유할 가능성은 낮아지는 것으로 나타났다. 본 연구의 결과는 금융소비자들의 ELS 투자의사결정에 도움이 되는 정보를 제공하고, 금융투자회사가 ELS 상품설계와 판매과정에서 금융소비자의 수요를 이해할 수 있도록 조력하며, 투자자보호를 위한 방안을 모색하는 데에 활용될 수 있을 것이다. This study examined the ELS(Equity-Linked Securities) investment behaviors, and compared ELS investors’ socio-economic and financial characteristics by ELS types (principal guaranteed ELS vs. principal non-guaranteed ELS). Also it examined the factors that affect the determination of ELS types. A survey with 336 individuals aged 20 and over was conducted. According to the analyses, it has been found that 336 respondents had a total of 488 ELS, meaning one person has 1.44 ELS on average. Among them, ELS with non-guaranteed principal were 51.4%. Average amount of investment on ELS was 30,240 thousand won and expected rate of return was 15.6% on average. Average investment period was 3.63 years. About 53.3% of respondents had experiences in ELS investment. Respondents’ expected rate of return of ELS was higher than the rate of return they had gotten from previous ELS investments. Respondents showed low level of financial literacy on ELS. According to comparison of ELS types, those who had ELS with non-guaranteed principal had higher expectation on the rate of return, longer period of investment, more experiences on ELS investment, and higher level of financial literacy on ELS, compared to the others. Also, amount of total assets and investment assets was more for principal non-guaranteed ELS investors than the others. Those who had ELS with non-guaranteed principal showed higher level of risk tolerance, and were likely to be in the risk-seeking group. The results of logistic regression showed those who had longer period of investment, higher expectation of rate of return, higher level of risk tolerance were less likely to have ELS with guaranteed principal.

초임계 이산화탄소 브레이튼 사이클의 예비냉각기를 위한 직관형 PCHE의 열전달 특성

박주현(Joo Hyun Park),권진규(Jin Gyu Kwon),김무환(Moo Hwan Kim),차재은(Jae Eun Cha),조항진(HangJin Jo) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11

A printed circuit heat exchanger (PCHE) take an attention as a new type of heat exchanger for a high pressure system. The PCHE is fabricated by the photochemical etching and diffusion bonding process. The PCHE has micro-channels with complex geometries due to photochemical etching that provide high heat transfer performance and can operate at high pressure and high temperature due to diffusion bonding. In order to attain these advantages, PCHE was considered as a heat exchanger of supercritical CO₂ (sCO₂) Brayton cycle. The sCO₂ Brayton cycle is operated at high pressure and high temperature in order to operating at supercritical region. In this study, the heat transfers of a straight PCHE for a sCO₂ cooling with water were measured experimentally. To verify effect of properties near the critical point of CO₂, experiments with different operating condition was conducted. It can be explained about better heat transfer performance near the critical point.