Arbitrage, Equilibrium and Smooth Trades

Won, Dong-Chun,Kim, Choong-Hwan 경제경영연구소 2004 經濟經營硏究 Vol.2 No.-

당뇨병성 신경병증에서 근위부 비골신경전도 검사를 이용한 병태생리학적 접근

김동현,이강건,박종원,박태환,안병철,권오상 대한신경과학회 1998 대한신경과학회지 Vol.16 No.2

자동 문턱치 방법을 이용한 밀리미터파 영상의 은닉된 물체 영역 검출

이동수,염석원,손정영,김신환 대구대학교 정보통신연구소 2010 情報通信硏究 Vol.7 No.1

본 논문은 수동형 밀리미터파 영상 시스템을 이용하여 은닉된 물체의 영역을 검출에 관한 연구이다. 밀리미터파 영상은 악천후에도 영상 촬영이 가능하고 플라스틱, 종이, 나무, 옷, 머리카락 같은 특유한 물질들을 투과한다. 그리고 밀리미터파는 금속과 특수한 인공 구조물에 대한 반사율이 높기 때문에 은닉된 물체를 쉽게 검출할 수 있다. 본 논문에서는 밀리미터파 영상에서 은닉된 물체 검출의 영상 분할을 자동 문턱치 방법으로 나타낸다. 본 논문에서는 8㎜ 파장을 수평과 수직 편광 방향으로 수신하는 두 채널에서 획득된 밀리미터파 영상을 Gonzalez와 Otsu 방법으로 영역 분할을 한다. 실험 결과는 Gonzalez과 Otsu 방법 모두 은닉된 물체 영역의 형태를 잘 분리하지만 Otsu 방법이 노이즈와 몸체 영역의 경계 부분이 안정적으로 영역 분할됨을 보인다. We address an image segmentation method to detect concealed objects captured by passive millimeter wave (MMW) imaging. Passive MMW imaging can create interpretable imagery on the objects concealed under clothing. Due to the penetrating property of the MMW imaging, the MMW imaging system is often employed for the security and defense system. In this paper, we develop automatic thresholding methods for the segmentation of concealed objects detected by PMMW imaging. The automatic thresholding method is useful for the image with bimodal distributions. We compare several thresholding methods for two MMW channel images which have 8 mm-horizontal and 8 mm-vertical polarization, respectively. The experimental results show that concealed weapon area is well segmented from the background body by the presented methods.

알루미늄 합금과 고장력 강판 접합을 위한 헬리컬 SPR의 단조공정 설계

김원영, 김동범, 김기호, 김도훈, 이인환, 조해용 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2

A self-piercing rivet(SPR) is a mechanical component for joining dissimilar materials. It is used for joining dissimilar material sheets such as aluminum alloy and steel. The self-piercing rivet directly pierces into sheets without drilling sheets beforehand unlike conventional rivets. However, the self-piercing rivet occurs buckling when piercing high strength steel. Therefore, a helical SPR which can pierce high strength steel sheet was designed. In this study, forging process was designed for manufacturing the helical SPR and simulated by using commercial FEM code DEFORM-3D. In the simulation of forging process for manufacturing rivet, process sequence, formability, forging load were investigated. The suitable forging process could be designed by comparisons of simulated results. Experimental trials have been carried out for same conditions as simulated ones. The simulated results agreed with the experimental ones. So, the analytic approach in this thesis is useful to save cost and time in the forging industry

양극산화와 절연파괴로 형성한 인산칼슘 함유 티타늄 산화피막의 특성

최원호,이용승,김동환,권용훈,배태성 大韓齒科器材學會 2003 대한치과재료학회지 Vol.30 No.1

This study was performed to investigate the surface properties of electrochemically oxidized pure titanium by anodic spark deposition technique. Titanium plates of 10×10×1 ㎜ were polished sequentially from # 300 to # 1,000 emery paper. They were ultrasonically washed in ethyl alcohol and acetone for 5 min and dried in a desiccator. Titanium plates and titanium screw implants were anodized in an electrolytic solution that was dissolved calcium and phosphate in water. The electrolytic voltage was set in the range of 190-340 V and the current density was 30 ㎃/㎠. The surface oxide film was characterized by X-ray deffractometer(XRD), scanning electron microscope(SEM) and X-ray photoemission spectroscopy(XPS). The main crystal structure of the titanium oxide was anatase type as analyzed with thin-film X-ray diffractometery. The diameter of micropores increased with increasing the spark forming voltage. The porous coatings showed the growth of cell structure and more compact texture with increasing the spark forming voltage. Microcracks were examined in the coating formed at voltage of 340 V. Ca/P ratio in coatings was increased with increasing the voltage.

『辨證奇聞』의 醫學的 特徵에 關한 考察 : 傷寒門을 중심으로 In view of ShangHan

이원석,박선동,박원환,김준기,김종대 동국대학교 한의학연구소 1998 東國韓醫學硏究所論文集 Vol.6 No.2

『辯證奇聞』은 淸代(1687年) 陳土鐸이 著述한 醫書로서 126門의 형식으로 이루어져 있다. 내용을 보면 한의학적 理法方藥의 논리체계를 제시하였다고 볼 수 있다. 明末淸初이후 중국에서는 實證的인 學風의 등장에 따라 歷史理論에 대한 비판 및 정리작업이 활발히 이루어지기 시작하였으며, 이 시기에 저작된 『辯證奇聞』은 현재 우리나라 臨床家에서 널리 膾炙되고 있는 秘方과 관련된 醫書중의 하나로 이에 대한 내용을 정리함으로서 현대와의 연계를 도모해 볼 수 있었다. 주로 腑臟辯證論治에 대한 시각에 입각하였고, 「傷寒論」을 보완하면서 비판한면도 찾아볼 수 있었다. 약물은 體內의 津液損傷與否를 살펴 사용하였다. In order to find the characteristic medical mothods of 『BianZhengGiMun』by the author ChenshiTo, we have translated and analyzed the mentioned book. Upon analyses, the following facts were noted: 1) 『BianZhengGiMun』is written and composed of case studies. Prescriptive methods described here differ rather from previously known methods, where as our nation's Oriental medicine practioners refer and consider these methods as miraculous modern methodologies. 2) Book's content has much similarities to 『ShangHanLun』's original text. Moreover, the content is adjusted towards presenting methodologies not covered in 『ShangHanLun』's text, together with adding more information to converse 『ShangHanLun』's methods as well as to critique them. 3) Diagnostic methods mainly follow the ZangFuBianZheng(朧腑辨證)'s pattern, where it's recorded information and theories are valid. 4) 『BianZhengGiMun』's prescriptive methods usually follow BuYinShengJin(補陰生津)'s form, where they were appropriate for that period and circumstances. 5) In consideration of all of the above factors, ChenShihTo grasped ShangHan and WenBing(acute febrile disease due to exogenous factor) as WaiGanReBing(外感熱病)'s double sided characteristics, where this corresponds with the current belief. It is believd that this in turn would provide much practical value to the present time.

Isoniazide 투여에 의한 Catecholamine의 생체내 변동에 미치는 Pyridoxal의 영향

김석환,최종원,김동훈 慶星大學校 環境問題硏究所 1991 環境硏報 Vol.1 No.1

Isoniazide is used in the treated of TB,the treatment of vitamine B?? is required in order to prevent their associated side effect, especially peripheral neuritis and severe exrcitation. The present work was undertaken to investigate the drug interaction between INAH and pyridoxal. When effect of pyridoxamine and pyridoxine on the hepatic mitochondrial MAO activity was investigated in vivo and in vitro test, its was slightly increased. But pyridoxal was significantly increased the activity of mitochondrial MAO compared to control. pyridoxal pretreatment in INAH-treated rats led to increased hepatic MAO activity and decreased catecholamine level in serum and urine. It was also observed that VMA level in the urine was insreased significantly the pretreatment with pyridoxal compared with INAH-treated group. Consequently, it was observed that the action of detoxification by the pretreatment of pyridoxal was due to the increasment of hepatic mitochondrial MAO activity and VMA excretion.

교정치료에 따른 측모 연조직의 변화에 관한 계수공제 영상측정법적 연구

조원탁,유동환 대한치과교정학회 1997 대한치과교정학회지 Vol.27 No.3

본 교정 치료에 의한 경조직과 측모 연조직의 변화를 정량화하고 그들 상호간의 관계를 규명하기 위하여 원광대학교 치과대학 교정과에서 내원한 교정환자중 성장이 완료된 40명(발치군 20명, 비발치군 20명)의 여자 환자를 대상으로 치료 전후의 두부방사선계측사진을 채득하여, 경조직과 연조직 항목의 변화를 계측하고 계수공제영상 측정법을 이용하여 구순의 변화면적을 산출항 다음과 같은 결론을 얻었다. 발치군에서의 상순과 하순부위의 연조직 변화(UL, LL)는 558.60±355.17, 941.15±364.07 pixels이었으며, 비발치군에서의 상순과 하순 부위의 연조직 변화(UL)는 상악 중절치의 이동량(△UIP)과 높은 상관성이 있으며, 하순부위의 연조직 변화(LL)는 상악 중절치의 이동량(△UIP), FH평면에 대한 상악중절치의 각도의 변화(△FUIA), 절치간 각도(△IIA)와 높은 상관성을 보였다. 상악중절치 변화(△UIP)와 상순변화(△LS)의 비율은 1.68, 하악중절치 변화(△LIP)와 하순변화(△LI)의 비율은 1.19, 상악중절치 변화(△UIP)와 상순의 두께 증가량(△TUL)의 비율은 1.95이었다. 비발치군에서는 상순부위의 연조직 변화(UL)와 상악중절치의 변화(△UIP)간에 유의한 상관성이 인정되었다. The purpose of this study was to quantify the changes of soft tissue profile following orthodontic treatment and to evaluate the relationship of those to the skeletal elements. Pre-and post-treatment lateral cephalometric head films of 40 cases(20 extraction cases, 20 non-extraction cases) were traced, and the changes following treatment were measured and quantified by digital subtraction method, and statisticall analyzed. The obtained results were as follows; 1. in extraction group, the change of upper lip area(UL) was 558.60±355.17 pixels, that of lower lip area(LL) was 941.15±364.07 pixels. But, in non-extraction group the change of upper lip area(UL) was 125.65±404.16 pixels, that of lower lip area(LL) was 104.05±440.93 pixels, which was significantly lesser than those in extraction group. 2. In extraction group, there was significant correlationship between upper lip area change(UL) and difference of upper incisor point(△UIP). Lower lip area change(LL) was significantly correlated with difference of upper incisor(△UIP), difference of Frankfort upper incisor angle(△FUIA) or difference of interincisal angle(△IIA). 3. In extraction group, the ratio of difference of upper incisor point(△UIP) to difference of labrale superius(△LS) was 1.68; difference of lower incisor point(△LIP) to difference of labrale inferius(△LI) was 1.19; difference of upper incisor point(△UIP) to increment in upper lip thickness(△TUL) was 1.95. 4. In non-extraction group, there was a significant correlationship between upper lip area change(UL) and difference of upper incisor point(△UIP).

액체크로마토그래피/질량분석법을 이용한 랫트 혈장내의 Surfactin C의 정량법에 관한 연구

임종환,김명석,이동연,이상훈,백경진,김태원,정두순,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Surfactin isolated from Bacillus subtilis has a strong surface tension-lowering activity, together with antiviral, antitumor, fibrinolytic and hypocholesterolemic activities. LC/MS is a simple, rapid and effective technique for the determination of surfactin C in rat serum. The separation of surfactin was achieved on reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and acetonitrile (B). As a result of analysis of blank rat serum samples, matrix interference was not shown. The values of precision and accuracy were satisfied w the guideline. A newly developed LC/MS method for the determination of surfactin C was successfully applied in its pharmacokinetic analysis.

유아의 어휘력을 높이기 위한 통합적인 언어 프로그램 : 동시를 중심으로 Via Utilizing Nursery Rhyme

정동환,정원주 한말연구학회 2003 한말연구 Vol.- No.12

A language plays an important role of consequence in creating the spirit of the native nation which grown up by emplying it as a vernacular. The structure of a language - whether it is that of sound, or that of words, or that of grammar - is planted in the world of notion of each people who use the language as their mother tongue, vernacular. Whereas, this world of notion rarely changes throughout one's lifetime. This is what generating the wpiritual world of each nation's people. Consequently, It can be said that mankind can be albe to become a 'sane human beings' by means of a language. In view of such statement, the job of enhancing their vocabulary ability during childhood period is a very rewarding task to let them not only learn their vernacular language, but also consolidate the spiritual world of their native people in their minds. Through this thesis, I exerted myself to guide, and to increase the vocabulary ability of children by presenting an integrated language program via nursery rhymes. The analysis result of the vocabulary ability classified by the gender of male and female shows that the male of experiment has witnessed the increase of +1.69 while the female of experiment has that of +3.58, from which we could see the vocabulary ability for female has greatly increased. During instructing the entire process of the integrated language program, I could discover female children behave more actively and participate more positively than male counterpart. The analysis result of the vocabulary ability classified by the ages of full 4-year-olds and full 5-year-olds is presenting that the full 5-year-olds of the experiment has improved by +3.27 while the full 4-year-olds did by +2.00, from which we could find that the vocabulary ability of the full 5-year-olds has improved greatly. Even there is only one year difference in these two groups, we could see that the more effective period for receiving the integrated language program is the full 5-year-olds, which is the age of just right before entering the primary school. The analysis result of the commanding vocabularies and the entire vocabulary ability of the language expression employed by two groups, experiment group and a controlled one, is presenting that the experiment group has shown a great difference of +5.27 by shifting the average of 20.47 at pre test to 25.74 at post test. I could confirm that the integrated language program plays an important role in increasing vocabulary ability of children.