시간속성과 주기(週期)에 따른 경기(經氣).오유혈(五兪穴) 변화에 대한 연구

최용대,김병수,강정수,Choi, Yong-Dae,Kim, Byoung-Soo,Kang, Jung-Soo 대전대학교 한의학연구소 2010 한의학연구소 논문집 Vol.19 No.1

In Neijing("內經"), it explains heaven, earth, four seasons(天地四時) take part in human's birth, it gives influence on life support, and have organic relationship between body and movement of sun and earth(日月運行) of heaven and earth. Human body and the natural world corresponds, so the time changes in the natural world give immediate influence to human body, and correspond changes happen inside human body. This has no exception in qi of human(人氣), meridians, the viscera and organs(臟腑) and so on. In time, there are many kinds of cycles such as year, month, 10 days and a day. Yin and yang and the five elements in each cycle shows changes of prosperity and decay and transformation. In a year, there are spring, summer, late summer, fall and winter which are each included to wood, fire, earth, metal and water. Spring and summer belong to yang(陽), and fall and winter belong to yin(陰). A day can be divided into the crowing of the cook, dawn, noon, and twilight. After midnight yin falls and yang rises(陰盡陽生), and after noon yang falls and yin rises(陽盡陰生). Ups and downs of the qi and blood and human body change with time and the region of whereabout is different. In one month, when the moon is full qi of blood rises and when the moon comes down qi of blood falls. The qi of meridian(經氣) has a periodical changes with regular movement in meridian. This is a result of continuing movement of meridian and the nutrient(營) and the defense(衛) in human body, stars correspond with ups, and correspond with flow of water of meridian(經水) with downs. In a day the twelve meridians(十二經脈) in hour of yin(hours 3~5), it starts with qi and blood of lung meridian(手太陰肺經) prosperous, each qi and blood of meridian prosperous in order. In eight extra meridians(奇經八脈), Bideungpalbup(飛騰八法) per 5 days, Younggoopalbup(靈龜八法) per 60 days qi of pulse(脈氣) changes correspond. The qi and blood of five meridian points(五兪穴) is 5 days, so.

Mn 조성비에 따른 Zn[1-x]Mn[x]Te와 Cd[1-x]Mn[x]Te 단결정 박막의 광발광 특성

최용대 한국물리학회 2005 새물리 Vol.50 No.4

Linear relations between the Mn omposition and the lattice constant for zinc-blende Zn1ကxMnxTe and -Cd1ကxMnxTe epilayers were found, and a linear extrapolation of the latticeconstant to x = 1 gave the lattice constant for the hypothetical zinc-blende MnTe. Without a magnetic eld, the 10-K photoluminescence spectra for the Zn1ကxMnxTe and the Cd1ကxMnxTe epilayers showed excitonic near-edge emissions low-Mn-content epilayers whereas intra-Mn2+ transition emissions dominated for high-Mn-content epilayers. Both the excitonic peak energy exhibited strong linear shifts to higher energy with increasing Mn content, and linear extrapolations of the peak energy to x = 1 gave the excitonic transition energy for zinc-blende MnTe. The intraMn2+transitions energy, however,did not depend on the Mn content. The temperature dependences of the excitonic peak positions, the line broadening, and the asymmetry of the spectral shape for Cd1ကxMnxTe epilayers were also investigated.

폐쇄성황달에 대한 전산화단층촬영술의 진단적 의의

최용대 대한영상의학회 1982 대한영상의학회지 Vol.18 No.4

Computed tomographic (CT) scans of 46 jaundiced patients were studied to determine the value of CT in the diagnosis of biliary pathology. All of the 12 cases of medical jaundice had positive CT correlation. Of the 34 cases of proven surgical jaundice, 97.8% were correctly identified by CT. In detecting the level of obstruction, the cases were divided into four groups by anatomical segments, according to the number of visualized low density ringlike structures produced by dilated bile duct. All of the correctly diagnosed surgical jaundice was 91.2%. The presence of stones or mass, the level of obstruction and the relative size and shape of visualized distal ring had proved to be the most important variables in etiological diagnosis of surgical jaundice. The results indicate that CT is useful and highly accurate in differenting between surgical (obstructive) jaundice and medical (non-obstructive) ajundice, and determining the level of obstruction and the etiology of surgical jaundice.

배드민턴 라켓용 Sheath/core 복합구조 String의 제조 및 특성

최용대,박영미,Choi, Yong-Dae,Park, Young-Mi 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.5

This paper presents a method of preparing a high-strength sheath/core complex badminton string and examines its playability and durability performance. From repeated experiments at the laboratory scale, it was determined that the tensile characteristics of sheath/core complex strings are better than those of widely used general strings. The key process of braiding, in which the string is prepared by twisting sheath multifilament around the core of a 3-ply monofilament, and the time required for applying a thin layer of coating, have decisive effects on the physical properties. The yarn diameter was found to be optimal when the string was coated three times and the structure of the sheath/core was composed of multifilament 1890d/monofilament 100d. SEM identified an increase in the inner thickness of the sheath/core string with braiding and coating. To conclude, Sample D displayed high tenacity, tensile extension, and tensile strength, which can affect durability, while its tensile modulus was the lowest (54.13 g/tex), which is indicative of good playability.

Platform for Manipulating Polarization Modes Realized with Jones Vectors in MATHEMATICA

최용대,김보경,윤희중 한국우주과학회 2015 Journal of Astronomy and Space Sciences Vol.32 No.2

The fundamental conception in physics of the propagation of the electromagnetic wave polarization in matter is newly understood as the cardinal keyword in free-space quantum communication technology and cosmology in astrophysics. Interactive visualization of the propagation mechanism of polarized electromagnetism in a medium with its helicity has accordingly received attention from scientists exploiting the protocol of quantum key distribution (QKD) to guarantee unconditional security in cryptography communication. We have provided a dynamic polarization platform for presenting the polarization modes of a transverse electromagnetic wave, converting the state of polarization through the arrangement of optical elements, using Jones vectors calculations in Methematica. The platform graphically simulates the mechanism of production and propagation of the polarized waves in a medium while satisfying Maxwell's equations.

GaAs(100)기판 위에 성장된 $Zn_{0.86}Mn_{0.14}Te$에피막의 띠 간격 에너지

최용대,안갑수,이광재,김성구,심석주,윤희중,유영문,김대중,정양준 한국결정성장학회 2003 한국결정성장학회지 Vol.13 No.3

본 연구에서는 두께가 0.7 $\mu \textrm{m}$인 $Zn_{0.86}Mn_{0.14}$Te 에피막을 GaAs(100) 기판 위에 열벽 적층 성장하였다. 선택에칭용액에 의하여 GaAs 기판이 제거된 X-선 회절 패턴으로부터 $Zn_{0.86}Mn_{0.14}$Te에피막의 결정구조는 zincblende 이었으며 격자상수는 6.140 $\AA$으로 계산되었다. 이러한 격자상수 값과 Vegard 법칙으로부터 Mn의 조성비 x=0.14임을 알았다. 성장된 에피막의 결정성은 이중결정요동 곡선의 반폭치 값이 256 arcsec인 것으로부터 양호하다는 것이 확인되었다 상온에서 10K 까지 $Zn_{0.86}Mn_{0.14}$Te에피막의 온도에 따른 띠 간격 에너지를 측정하기 위하여 투과 스펙트럼으로부터 흡수 스펙트럼이 얻어졌다 온도가 감소할수록 흡수 스펙트럼에서 강하게 흡수가 일어나는 영역은 에너지가 큰 쪽을 향하여 이동하였고 흡쑤단 근처에서 자유 엑시톤 형성을 의미하는 흡수 피크가 생겨났다. $Zn_{0.86}Mn_{0.14}$Te에피막의 온도에 따른 자유 엑시톤 피크 에너지로부터 OK와 300 K일 때 띠 간격 에너지는 각각 2.4947 eV와 2.330 eV로 구하여졌다. 10 K에서 기판이 제거된 $Zn_{0.86}Mn_{0.14}$Te 에피막의 흡수 스펙트럼의 자유 엑시톤 피크 에너지는 광발광 피크 에너지보다 15.4 meV 정도 크다. 이 에너지 차이는 흡수 스펙트럼과 발광 피크 사이의 에너지 차이를 의미하는 Stokes shift를 나타낸다. In this study, $Zn_{0.86}Mn_{0.14}$Te epilayer of 0.7 $\mu\textrm{m}$-thickness was grown on GaAs(100) substrate by using hot wallepitaxy. GaAs(100) substrate was removed from $Zn_{0.86}Mn_{0.14}$Teepilayer by the selective etching solution. The crystal structure and the lattice constant of only Z $n_{0.86}$ M $n_{0.14}$Te epilayer were investigated to be zincblende and 6.140 $\AA$ from X-ray diffraction pattern, respectively. Mn composition x of $Zn_{1-x}Mn_x$Te epilayer was found to be 0.14 using this lattice constant and Vegard's law. The crystal quality of the epilayer was confirmed to be very good due to 256 arcsec-full-width at half-maximum of the double crystal rocking curve. The absorption spectra from the transmission ones were obtained to measure the band gap energy of $Zn_{0.86}Mn_{0.14}$Te epilayer from 300 K to 10 K. With the decreasing temperature,. strong absorption regions in the absorption spectra were shifted to higher energy side and the absorption peak meaning the free exciton formation appeared near the absorption edge. The band gap energy values of $Zn_{0.86}Mn_{0.14}$Te epilayer at 0 K and 300 K were found to be almost 2.4947 eV and 2.330 eV from the temperature dependence of the free exciton peak position energy of $Zn_{0.86}Mn_{0.14}$Te epilayer, respectively. The free exciton peak position energy of $Zn_{0.86}Mn_{0.14}$Te epilayer without GaAs substrate was larger 15.4 meV than photoluminescence peak position energy at 10 K. This energy difference between two peaks was analysed to be Stokes shift.

ZnS_(1-x)Te_x 단결정 박막의 띠 간격 에너지에 대한 광학적 휨 상수

최용대 목원대학교 자연과학연구소 2000 自然科學 硏究論文集 Vol.9 No.2

Hot wall epitaxy법으로 ZnS_(1-x)Te_x 단결정 박막을 GaAs(100)기판 위에 성장하여 광학적 특성을 조사하였다. 성장된 ZnS_(1-x)Te_x 단결정 박막의 Te의 조성비 x에 따른 에너지 띠 간격의 변화를 조사하기 위하여 사온에서 투과 스펙트럼을 측정하였다. ZnS_(1-x)Te_x 단결정 박막의 띠 간격에 대한 휨 상수 b=3.8의 값을 갖는 2차 함수 형태이었다. 본 연구에서 성장한 삼원 화합물 ZnS_(1-x)Te_x 단결정 박막의 띠 간격 에너지 값은 Te조성비 x가 70%일 때가 가장 적었다. In this study, ZnS_(1-x)Te_x ternary alloy epilayers have been grown on GaAs(100) substrates by hot wall epitaxy and their optical properties were investigated. The optical transmission for ZnS_(1-x)Te_x/GaAs epilayers was measured to investigate the energy band gap at room temperature after removing the GaAs substrates. The energy band gap of the ZnS_(1-x)Te_x alloy was found to be quadratic with the optical bowing parameter b=3.8. The band gap energy as a function of Te composition shows a minimum at about x=70%.

누두흉의 수술 교정 방법에 관한 비교연구

최용대,김민호,김공수,Choe, Yong-Dae,Kim, Min-Ho,Kim, Gong-Su 대한흉부심장혈관외과학회 1992 Journal of Chest Surgery (J Chest Surg) Vol.25 No.3

From Jan. 1981 to Dec. 1989 eleven cases of Funnel Chest, ten were males and one was female, were underwent an operation at the Department of Thoracic and Cardiovascular Surgery. Cheonbuk National University Hospital. The age of patients ranged from 3 to 29 years old. They all had symptoms of feeling inferiority about chest deformity. The degree of concavity on the funnel chest varied in extent, and the severity which was measured by water volume filled into it varied from 20 ml to 140 ml. Nine patients were corrected by Ravitch method and two patients were corrected by the Modified sternal turnover method. The Ravitch method was more effective in asymmetrical, severe depression deformity and in children. On the other hand the Modified sternal turnover method with preservation of vascular supply of repair was more simple and more effective in case of relatively less severe, wide symmetrical depression deformity of the chest and in case of associated with congenital or acquired heart disease and disease of the ascending aorta. This method has the advantage of maintaining chest wall stability in postoperative period.

외상성 기관지 파열

최용대,조중구,김공수,Choe, Yong-Dae,Jo, Jung-Gu,Kim, Gong-Su 대한흉부심장혈관외과학회 1992 Journal of Chest Surgery (J Chest Surg) Vol.25 No.10

Rupture of a bronchus is an unusual result of blunt trauma to the chest. We experienced a case of bronchial rupture caused by blunt chest trauma without external wound or rib fracture. This case was a 13 years old male who was elementary school student. He was compressed on anterior chest by basket ball goal post being failed down on the afternoon of admission day. After this accident, he was suffered from progressive dyspnea and chest pain. The bronchial rupture was confirmed by bronchogram, The operation was performed through standard posterolateral thoracotomy incision along the 5th rib course. The right upper lobe bronchus and intermediate bronchus was completely transected. The right upper lobectomy was done. The ruptured intermediate bronchus was connected direct simply. Post-operative course was uneventful. Thus we report this case of traumatic bronchial rupture with review of literature.

ZnS 단결정 박막의 온도에 따른 공명 라만 산란 선의 변화

최용대 목원대학교 자연과학연구소 2000 自然科學 硏究論文集 Vol.9 No.2

Hot wall epitaxy에 의하여 성장된 고품질 ZnS단결정 박막의 공명 라만 산란 스펙트럼을 조사하였다 325 nm He-Cd laser의 여기 광원이 사용된 photoluminescence 스펙트럼으로부터 3개의 공명 라만 선들이 관측되었다. 이러한 3개의 공명 라만 선들의 에너지 피크 위치, 라만 주파수 이동과 세기의 특성이 온도에 따라 분석되었는데 이것들은 ZnS의 띠간격 에너지와 관계가 있음을 알았다. 이로부터 본 연구의 ZnS 단결정 박막의 공명 라만 선들의 LO포논 값들은 덩어리 ZnS의 값과 거의 일치함을 알 수 있었다. Resonant Raman scattering spectra for high-quality ZnS epilayers grown by hot-wall epitaxy have been studied extensively. With a 325­nm He-Cd laser as the excitation source, three resonant Raman lines were observed in photoluminescence spectra. The temperature dependence of energy peak positon,Raman shift and intensity of three resonant Raman lines were analyzed, which were related to the temperature dependence of the energy gap of ZnS. The values of the longitudinal-optical(LO) phonon energy between neighboring resonant Raman lines were very close to LO phonon energy of bulk ZnS.