SHS 공정으로 합성된 TiC 계 cermet 미세구조에 미치는 바인더 금속의 영향

박민우,한유동,전재호,김명진 대한금속재료학회(대한금속학회) 1999 대한금속·재료학회지 Vol.37 No.11

Microstructural evolution of Ti-C-metal binder powder mixtures during SHS process was investigated by combustion-wave arresting technique. Al, Fe, Co, Ni and Cu were selected as binder metals of TiC-based cermet. The characteristics of SHS reaction occurred in different mode, depending on the binder metals. SHS reaction resulted in the three distinct regions; such as unreacted, partially reacted, and fully reacted parts. The intermediate phases of Ti and the metal binder were formed in the partially reacted region. The resulting cermet in the fully reacted region consisted of round shaped carbide particles and metal binder phase.

VR 무빙워커

박민우,소병민,김유나희,양세동,강현식,김가인 한국조명·전기설비학회 2022 한국조명·전기설비학회 학술대회논문집 Vol.2022 No.11

양측 돌발성 난청을 동반한 재발성 다발성 연골염 1예

박민우,김보형,임대준,강성호 대한이비인후과학회 2014 대한이비인후과학회지 두경부외과학 Vol.57 No.4

Relapsing polychondritis is a relatively rare systemic disease of unknown etiology. The disease is considered as an autoimmune disorder and characterized by episodic recurrent inflammation of cartilage and connective tissue, most often of the ears, nose, eyes, joints, respiratory tract, cardiovascular system and audiovestibular system. Treatment plans involve suppression of the immune system with corticosteroid. However, steroid therapy is associated with a number of adverse effects, and non-steroidal anti-inflammatory agents and immunosuppressive agents are helpful in treating the disease. Authors have recently experienced a case of relapsing polychondritis in a 24-year-old man who had both auricular chondritis and bilateral sudden hearing loss with vertigo. The patient showed a significant hearing improvement with the treatment using steroid and immunosuppressive agents. We report this case with a review of the literature. Korean J Otorhinolaryngol-Head Neck Surg 2014;57(4):279-82

갑상선암에서 진행된 림프절 전이에 대한 수술적 치료

박민우,노영수 대한갑상선학회 2018 International Journal of Thyroidology Vol.11 No.2

Metastases to regional cervical lymph nodes occur frequently in patients with thyroid cancer. The appropriate management of regional lymph node is important to achieve good disease control and to classify risk stratification for adjuvant radioactive iodine. However, there are some occasions that neck dissection is difficult and embarrassing in thyroid cancer. Especially, extensive or unusual nodal metastases bring challenges and makes neck dissection more difficult. Carotid artery management is one of the most difficult procedure in neck dissection. The management of patients who have persistent or recurrent cervical metastasis involving the carotid artery has been controversial and treatment dilemma to the surgeon. Metastasis of well differentiated thyroid cancer to the retropharyngeal lymph nodes is rare but occasionally encountered. The complete surgical excision is usually recommended for retropharyngeal lymph node metastasis of well differentiated thyroid cancer. An extensive mediastinal dissection in advanced differentiated thyroid carcinoma is occasionally required. This paper will review recent reports of management of advanced nodal metastasis of thyroid cancer and share the author’s personal experience.

탁월한 물리화학적 내구성 및 전기화학적 특성을 가진 폴리 아릴렌 피페리디늄(PAP) 음이온교환막과 상승 효과를 위한 GO기반 무기물 충진제 적용 및 특성 분석

박민우,김애란,김범호,유동진 한국에너지학회 2022 한국에너지공학회 학술발표회 Vol.2022 No.10

농업가뭄인자 미계측 지역의 농업가뭄 추정을 위한 기상학적 가뭄지수의 활용성 평가

박민우,김선주,권형중,김필식,강승묵,이재혁,Park, Min Woo,Kim, Sun Joo,Kwon, Hyung Joong,Kim, Phil Shik,Kang, Seung Mook,Lee, Jae Hyuk 한국농공학회 2017 한국농공학회논문집 Vol.59 No.5

The object of this study was to assess availability of meteorological drought index for agricultural dorught estimation in ungauged area of agricultural drought parameters which are reservoir water level and soil moisture. The IADI (Integrated Agricultural Drought Index) and the SPI (Standard Precipitation Index), which are the criteria for determining agricultural drought and meteorological drought, were calculated and compared. For this purpose, the droughts that occurred in the Baeksan reservoir in Gimje and the Edong reservoir in Suwon were evaluated by using the IADI and SPI drought indecies. In addition, we compared and analyzed the depth of drought based on the two drought indices. Evaluations derived form the IADI and SPI showed that the standard precipitation index tended to indicate the occurrence of drought earlier than the integrated agricultural drought index. However, the integrated agricultural drought index was better than the standard precipitation index at evaluating the severity of drought during the period of irrigation. The relationship between these two drought indices seems to be useful for decision making in the case of drought, and it is considered that more studies are needed to examine the applicability of these drought indexes.

제56차 춘계학술대회 : 일반포스터 ; 수인성 두드러기(Aquagenic Urticaria) 1예

박민우,김영진,김상석,이종주 대한피부과학회 2004 초록집 Vol.42 No.10

전기방사를 이용한 전도성 나노섬유의 제조와 응용

박민우,정운룡 한국세라믹학회 2013 세라미스트 Vol.16 No.1

크라이슬러와 제너럴모터스의 도산사건이 우리나라의 도산제도에 주는 시사점 - 시스템리스크와 도산절차 -

박민우 한국상사법학회 2012 商事法硏究 Vol.30 No.4

Chrysler and General Motors entered and exited bankruptcy within two months, making it one of the fastest major industrial bankruptcies in the history. They entered as companies widely thought to be ripe for liquidation if left on theirs own, obtained massive funding from the United States Government, and exited via pseudo-sale of their main assets to two new government-funded entities. Both debtors were provided with substantial government financing from U.S., and both cases involved a quick sale of the “good” parts of the debtors’ operating assets, while the remainder was left behind for liquidation. To help stabilize the U.S. automotive industry and avoid disruptions that would pose systemic risk to nation’s economy, in December 2008 the Treasury Department established the Automotive Industry Financing Program under Troubled Asset Relief Program. In both cases, U.S. government agreed to provided the automakers with DIP financing on condition that a sale of each debtor's asset occur on an expedited basis so as to preserve the value of the business, restore consumer confidence, and avoid the costs of a lengthy chapter 11 process which is systemic risk. Systemic risk is the risk of collapse of an entire financial system or entire market, as opposed to risk associated with any one individual entity, group or component of a system. It can be defined as “financial system instability,potentially catastrophic, caused or exacerbated by idiosyncratic events or conditions in financial intermediaries”. It refers to the risks imposed by bank-run and interconnectedness in a system or market, where the failure of a single entity or cluster of entities can cause a cascading failure, which could potentially bankrupt or bring down the entire system or market. Unlike the assistance of U.S. government to motor companies through the bankruptcy process, Korean government did not involved in a Ssangyong Motor bankruptcy case because Ssangyong Motor’s portion of Korean economy was so small that it could not make any threat of systemic risk. However, if Ssangyong Motor had been a big company like General Motors, the Korean government would have also given financial assistance via process of Corporate Restructuring Promotion Act not Debtor rehabilitation and bankruptcy act. Because Debtor rehabilitation and bankruptcy act does not have elements that make process fast to prevent causing the systemic risk such as automatic stay, DIP financing and prepackaged plan. Besides, the problem is that Corporate Restructuring Promotion Act is not permanent but temporary act. The Korea Ministry of Justice has proposed the change of Debtor rehabilitation and bankruptcy act including automatic stay. In addition to the proposal Debtor rehabilitation and bankruptcy act, I strongly recommend to add DIP financing and prepackaged plan on the proposal to prepare the non-financial company collapse that can make systemic risk.

Comparison of Carcass and Sensory Traits and Free Amino Acid Contents among Quality Grades in Loin and Rump of Korean Cattle Steer

박민우,조철훈,김현주,이현정,김현진,고종열,백명기 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.11

This study was performed to compare carcass traits, sensory characteristics, physiochemical composition, and contents of nucleotides, collagen, and free amino acids among quality grades (QG) and to understand the association between QG and above parameters in loin and rump of Korean cattle steer. Loin and rump samples were obtained from 48 Korean cattle steers with each of four QG (QG 1++, 1+, 1, and 2; average 32 months of age). Carcass weight and marbling score (MS) were highest in QG 1++, whereas texture score measured by a meat grader was highest in QG 2. A correlation analysis revealed that MS (r = 0.98; p<0.01) and fat content (r = 0.73; p<0.01) had strong positive correlations with QG and that texture had a strong negative correlation (r = –0.78) with QG. Fat content in loin was highest but protein and moisture contents were lowest in QG 1++. Our results confirmed that a major determinant of QG is the MS; thus, intramuscular fat content. The International Commission on Illumination L*, a*, and b* values in loin were highest in QG 1++. Numeric values of shear force in loin were lowest in QG 1++, whereas those of tenderness, juiciness, and overall acceptability tended to be highest in QG 1++ without statistical significance. QG was strongly correlated with juiciness (r = 0.81; p<0.01) and overall acceptability (r = 0.87; p<0.001). All sensory characteristics were higher (p<0.05) in loin than those in rump. Adenosine-5’-monophosphate (AMP) and inosine-5’-monophosphate (IMP) contents in both loin and rump did not differ among QGs. No nucleotide (AMP, IMP, inosine, hypoxanthine) was correlated with any of the sensory traits. Total, soluble, and insoluble collagen contents in loin were higher in QG 1++ than those in QG 1. All three collagens had lower content in loin than that in rump. All three collagens were positively correlated with tenderness, juiciness, and overall acceptability. Glutamic acid content did not significantly differ among the four QGs in either loin or rump. In conclusion, it is confirmed that QG is associated with sensory traits but nucleotide contents in beef may not be a major factor determining meat palatability in the present study.