IRE 콘퍼런스를 통해 본 미국의 비영리 저널리즘_3명의 기자가 2년간 매달려 기성언론의 부실 탐사 메우다

박성훈 한국언론진흥재단 2013 신문과 방송 Vol.- No.511

Design of Diamond Photonic Crystals with DNA Origami

박성훈,박해동,허가현,이승우 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1

구형 콜로이드 입자를 빌딩 블록으로 하는 오팔(opals), 역오팔(inverse opals) 등의 자기조립 광 결정(self-assembled photonic crystals)은 대면적 구조색 구현의 용이함으로 주목받았다. 하지만 이러한 면심입방체(face-centered cubic) 격자 내의 자기조립 광 결정은 각도 의존적인 색이 나타나는 단점이 있다. 이 단점은 파이로클로르(pyrochlore) 격자를 도입함으로써 해결되었으나, 파이로클로 격자가 갖는 광학적 특성은 가장 넓은 3차원 광 밴드갭(complete photonic bandgap)을 갖는 다이아몬드 격자에 미치지 못한다. 본 발표에서는 DNA 오리가미를 이용한 빌딩 블록의 형성과 빌딩 블록 간의 결정화 및 후처리 공정 제시를 통해, 가장 낮은 체적률에서 가장 넓은 3차원 광 밴드갭을 갖는 막대로 연결된 다이아몬드 격자 (direct rod-connected diamond lattice)의 구현 가능성을 논하고자 한다.

2상 스테인리스강의 오스테나이트상의 분포가 인장성질과 내식성에 미치는 영향

박성훈,이성근,성장현,김효종 대한금속재료학회(대한금속학회) 1991 대한금속·재료학회지 Vol.29 No.4

After obtaining two different distribution of austenite, fibrous and dispersed structure, in the ferrite matrix by changing the heat treatment paths, the amount of austenite, growth process of austenite, tensile properties and stress corrosion cracking(SCC) resistance of Fe-22Cr-7Ni-3Mo duplex stainless steel were investigated. The procedures of austenite formation from ferrite single phase appeared to the following sequence : 1) formation of austenite film along the grain boundaries of ferrite 2) growth of spike-like austenite from the ferrite grain boundaries to the grain interiors 3) formation of rod-like austenite at the ferrite grain interiors. The strength and elongation of the duplex stainless steel with fibrous structure were superior to those with dispersed structure. With increasing ferrite content, the increase in yield strength for the specimen of fibrous structure was remarkable. The SCC resistance of the duplex stainless steel was closely related to ferrite content. The SCC resistance of the dispersed structure in the duplex stainless steel appeared to superior compared to that of fibrous structure. With decreasing pH in 3.5% NaCl Solution, the SCC resistance decreased down to pH 5. On the other hand, the SCC resistances were nearly unchanged below pH 5.

입자 크기의 함수로 나타낸 대기 중 블랙카본의 변성시간척도

박성훈,Park, Sung Hoon 한국입자에어로졸학회 2009 Particle and Aerosol Research Vol.5 No.2

Black carbon, which is a by-product of combustion of fossil fuel and biomass burning, is the component that imposes the largest uncertainty on quantifying aerosol climate effect. The direct, indirect and semi-direct climate effects of black carbon depend on its state of the mixing with other water-soluble aerosol components. The process that transforms hydrophobic externally mixed black carbon particles into hygroscopic internally mixed ones is called "aging". In most climate models, simple parameterizations for the aging time scale are used instead of solving detailed dynamics equations on the aging process due to the computation cost. In this study, a new parameterization for the black carbon aging time scale due to condensation and coagulation is presented as a function of the concentration of hygroscopic atmospheric components and the black carbon particle size. It is shown that the black carbon aging time scale due to condensation of sulfuric acid vapors varies to a large extent depending on the sulfuric acid concentration and the black carbon particle size. This result indicates that the constant aging time scale values suggested in the literature cannot be directly applied to a global scale modeling. The aging time scale due to coagulation with internally mixed aerosol particles shows an even stronger dependency on particle size, which implies that the use of a particle-size-independent aging time scale may lead to a large error when the aging is dominated by coagulation.

관골골절 정복에서 수술 중 방사선촬영의 의의

박성훈,박용준 대한두개안면성형외과학회 2007 Archives of Craniofacial Surgery Vol.8 No.2

Purpose: The surgical treatment of zygoma fracture use generally three point fixation of the zygomaticofrontal suture, inferior orbital rim and zygomaticomaxillary buttress. But, this procedure has the disadvantage that we cannot know symmetry of the zygoma and visualize the reduction of the zygomatic arch. So, we take a intraoperative simple radiograph(zygomatic arch view) in reduction of zygoma fracture. Methods: From 2004 to 2006, We compared 21 patients with taking a intraoperative simple radiograph and 28 patients with not taking a radiograph. To assess the difference between the two groups, the authors compared the patients' subjective symptoms and measured the axial angle of the zygoma and zygomatic arch and the degree of the zygomatic arch inclination on zygomatic arch view. And we compared intraoperative simple radiograph with postoperative facial bone CT scan. Results: There was significant difference in appearance of subjective symptoms and the degree of zygomatic arch inclination representing the local contour of fractured zygomatic arch. And intraoperative simple radiograph is accorded with the postoperative facial bone CT scan. Conclusion: We think that taking a intraoperative simple radiograph in the treatment of zygoma fracture is satis-factory methods in cosmetics and accuracy of reduction.

APEC at a Crossroads: Challenges and Opportunities

박성훈,이정연 경남대학교 극동문제연구소 2009 ASIAN PERSPECTIVE Vol.33 No.2

Under the weight of various challenges, growing frustration both inside and outside APEC clouds its prospects as a lead institution in promoting regional cooperation in the Asia- Pacific. To help consider the future of APEC, we develop four scenarios that describe alternative paths the organization may take. Of the four, the preservation of the status quo appears to be the most probable short-term scenario given sharp divisions within APEC. But this option is not sustainable in the long term. The idea presently under discussion in APEC involves creating an APEC-wide free trade area. Despite its large potential benefits, this scenario faces serious obstacles and may at best be described as a truly long-term scenario. We suggest two other possibilities, an “OECD model” and an “institution for security cooperation,” which may serve as the medium-term scenarios that would help APEC preserve its current status as a center of Asia-Pacific regional cooperation. Under the weight of various challenges, growing frustration both inside and outside APEC clouds its prospects as a lead institution in promoting regional cooperation in the Asia- Pacific. To help consider the future of APEC, we develop four scenarios that describe alternative paths the organization may take. Of the four, the preservation of the status quo appears to be the most probable short-term scenario given sharp divisions within APEC. But this option is not sustainable in the long term. The idea presently under discussion in APEC involves creating an APEC-wide free trade area. Despite its large potential benefits, this scenario faces serious obstacles and may at best be described as a truly long-term scenario. We suggest two other possibilities, an “OECD model” and an “institution for security cooperation,” which may serve as the medium-term scenarios that would help APEC preserve its current status as a center of Asia-Pacific regional cooperation.

Effects of AIF on Knee Osteoarthritis Patients: Double-blind, Randomized Placebo-controlled Study

박성훈,김성규,신임희,김형건,최정윤 대한약리학회 2009 The Korean Journal of Physiology & Pharmacology Vol.13 No.1

Anti-inflammatory factor (AIF) is a water soluble extract of three herbs, Panax notoginseng (Burk.) F. H. Chen, Rehmannia glutinosa Libosch and Eleutherococcus senticosus. The present study aimed to investigate the safety and efficacy of herb extracts, AIF, on Korean knee osteoarthritis patients for six weeks. Fifty seven patients with knee osteoarthritis, ranging from 43 to 73 years of age, who fulfilled the “American College of Rheumatology” (ACR) classification of idiopathic osteoarthritis of knee and radiographic criteria were randomly selected and enrolled for the study. After initial screening and resting period, two capsules each of AIF (Each capsule contains; 400 mg) and similar identical placebo were administered twice a day to both groups. Pain intensity at second, fourth, and sixth weeks of study as well as one week after discontinuation of drugs was assessed by using 100 mm visual analogue scale (VAS). Changes in the Korean version of the Western Ontario and McMaster Universities (K-WOMAC) index score were compared at the initiation and completion of the study. VAS assessed by patients were significantly reduced (at visit 2; 54.64±14.72, at visit 4, 37.32±16.58, p<0.001) after AIF administration. Results showed an improvement in the physical function of K-WOMAC scale which was significantly higher (p=0.013) in AIF than placebo group, and decreases of total K-WOMAC score were also significantly higher (p=0.030) in AIF groups than placebo group. No serious adverse effect was observed, and there was no difference in incidence of adverse effect between AIF and placebo groups. In this population of Korean patients with knee osteoarthritis, AIF was found to be safe, tolerable and effective for symptomatic improvement of pain and physical function.

온도 변화가 흰쥐 고환 내 Heat Shock Protein 70 단백의 발현에 미치는 영향

박성훈,박광성,박양일 大韓泌尿器科學會 2003 Korean Journal of Urology Vol.44 No.2

A Typical Case of L-Transposition of the Great Arteries Initially Presented as Complete Atrioventricular Block in Middle-Aged Man

박성훈,최자연,박은진,김희동,최민주,최수인,김지백,이선기,나진오 한국심초음파학회 2015 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.23 No.1

L-transposition of the great arteries (L-TGA) is a rare congenital anomaly and could cause complete atrioventricular (AV) block atrelatively younger age. We present a case of 43-year-old male who complained of dizziness due to complete AV block. Weconfirmed L-TGA using transthoracic echocardiography and cardiac computed tomography. Permanent pacemaker was insertedwithout complications. No invasive treatment including corrective surgery was performed because patient’s cardiac function wasalmost normal and the symptom was completely resolved after pacemaker insertion.

급성 호흡부전의 치료: 비침습적 기계환기

박성훈 대한의사협회 2022 대한의사협회지 Vol.65 No.3

Background: Noninvasive ventilation (NIV) has been an important strategy to support patients with respiratory failure, while preventing complications assorted with invasive mechanical ventilation. Physicians need to be aware of the various roles of NIV and the challenges encountered in clinical practice. Current Concepts: Traditionally, the application of NIV has been well-known to be associated with reduced mortality in patients with chronic obstructive pulmonary disease (COPD) or acute pulmonary edema and those suffering from acute respiratory failure. However, despite some positive results of NIV treatment in patients with de novo hypoxemic respiratory failure such as acute pneumonia or acute respiratory distress syndrome, NIV failure (or delayed intubation) can have deleterious effects on patients outcomes. Besides, the aggravation of lung injury should also be taken into consideration when applied to patients exhibiting high respiratory drive. Nonetheless, NIV has potential for wide applications in various clinical situations such as facilitation of ventilator weaning, post-operative respiratory failure, or palliative treatment. Discussion and Conclusion: In addition to the strong evidence in patients with acute respiratory failure due to COPD or acute pulmonary edema, the NIV treatment can be potentially used for various clinical conditions. However, compared to European countries, the prevalence of NIV use continues to remain lower in South Korea. Nevertheless, when applied in appropriately selected patients in a timely manner, NIV treatment can be associated with improved patient outcomes.