NH₃-O₂-Ar 혼합기체의 점화 과정에서 H₂기체의 첨가 효과에 관한 연구

신권수,배균택 崇實大學校 2000 論文集 Vol.30 No.1

The addition effect of H₂on ignition of NH₃-O₂-Ar mixtures was examined in the temperature range of 1521-2193 K and the pressures in the range of 0.86-1.78 bar behind reflected shock waves. The ignition delay times were measured by monitoring pressure profiles and the OH emissions at 1.0 cm from the end wall. To complement the experiment, computer modeling study of the ignition of NH₃-O₂-Ar mixtures was carried out using various mechanisms reported previously.

환경친화성 계면활성제를 이용한 어병균의 살균효과

최상원,정관용,오남희,김은영,방정환,김정우,여문환 한국환경과학회 2000 한국환경과학회지 Vol.9 No.5

The antibacterial effect amino acid-copper(Ⅱ) surfactant on fish pathogens was studied. Fish pathogens of Edwardsiella tarda, Vibrio anguillarum, Aeromonas hydrophila and Streptococcus sp. were selected, cultured in nutrient agar and adjusted at 2 × 10 exp (5)∼10 exp (6) CFU/㎖ in phosphate buffer saline before the addtion of amino acid-copper(Ⅱ) surfactant with different concentrations. All tested pathogens died within 1 hour with 1 ppm of amino acid-copper(Ⅱ) surfactant. In comparison with formalin and ET, amino acid-copper(Ⅱ) surfactnat was more effective in antibacterial capacity.

고령 장애인의 일(WORK) 경험과 욕구에 관한 연구 : 뇌병변 장애를 중심으로

이효성,김근아,김태연,오정은 한국장애인고용촉진공단 고용개발원 2007 장애와 고용 Vol.17 No.2

본 연구의 목적은 고령이면서 장애를 동시에 경험하고 있는 고령 장애인들의 일 경험과 욕구에 관한 특성을 당사자의 관점에서 이해하는 것이다. 이러한 목적을 달성하기 위해 50세 이상 뇌병변장애인 13명을 대상으로 일 경험과 욕구에 관한 개방형식의 질문으로 심층 인터뷰를 실시하여 그 결과를 분석함으로써 고령 장애인 당사자의 일 경험과 욕구에 대한 심층적 이해와 현상의 의미를 깊이 있게 파악하고자 하였다. 분석결과, 고령 뇌병변장애인들은 일을 하고자 하는 높은 욕구를 가지고 있으며 일을 통해 삶의 의미와 보람을 찾고자 하나 현실적으로는 장애와 고령, 그리고 만성질환자라는 삼중고 속에서 “일하기” 에 상당한 제약을 받는 것으로 나타났다. 이러한 연구결과는 지금까지 고용정책에서 소외되었던 고령 장애인의 ‘일’ 에 관한 정책적 개입의 필요성을 강력하게 시사해 주고 있다. The purpose of this study is to understand the characteristics of the experiences and needs for work of aged people with disabilities who experience both old age and disability from their viewpoint. To this end, this study conducted in-depth interviews with 13 people aged 50 or older with encephalopathic disabilities by open-ended questions regarding their experiences and needs for work, and analyzed the results so as to more deeply understand the experiences and needs for work of aged people with disabilities as well as the implications of the present situation. The analysis results showed that aged people with disabilities have high needs for work and try to find the meaning and worth of life through work, but in reality face considerable limitations to ‘working’ in the triple handicaps of disability, old age, and chronic disease. The results of this study strongly suggest the need for policy intervention in the ‘work’ of aged people with disabilities who have been neglected by employment policies until now.

중증 미만성 뇌축색손상 환자의 MRI소견 및 임상적 고찰

김한겸,김성호,송시헌,김관태,김윤 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.1

The distribution and extent of traumatic lesions were evaluated with MRI in 31 patients with diffuse axonal injuries(DAI). Authors also analyzed patients with diffuse axonal injury, clinically. The patients with DAI showed statistically significant lower incidence of lucid interval, fracture of the skull and intracranial hematoma. Combined injuries, intracrnial hematomas and distribution of lisions were porved to be poor prognostic factors of DAI. Diffuse axonal injury is most commonly involved in the white matter of the frontal and temporal loves and the splenium of the corpus callosum. Patients with lisions in brainstem and cerebellum revealed worst prognoses. In our studies, the sensitivities of the imaging techniques for diffuse axonal injures were 7.3% with CT scan, 75.6% with T1WI, and with 97.6% in T2WI of MRI, respectively. The authors concluded that MRI has clear advantages over CT in evaluating diffuse axonal injuries.

STUDIES ON CONSTITUTION-ACUPUNCTURE THERAPY

Kuan, Dowon 명지대학교 1974 明大論文集 Vol.7 No.-

Since the theoretical system of constitution-acupuncture based on the theory of 8 constitutions developed by the author was reported at the 1st World con-gress of Acupuncture, held in Tokyo, Japan in 1965, the author has continued studies on extensive therapeutical formulas of the constitution-acupuncture. Even in case of an identical disease, the pathological theory and therapeutical need of each constitution are varied with each other in terms of the theory of 8 constitutions. Accordingly, the therapeutical method of each constitution should also be varied. This can be fully justified by the fact that each constitution has 9 formulas and therefore the 8 constitutions have a total of 72 formulas which has been successfully methodized by the author (not reported in part). Those exclusive formulas which have been newly developed but can not be applied to other constitutions than those referred to above are anmed as "field formulas" of the 8 constitutional fields.(cf. Explanatory Notes) However, the therapeutical capacity of individual field formula is not perfect, since those therapeutical formulas which may demonstrate strong healing power have been established by combining methodologically 8 formulas centering arou-nd one characteristic formula out of the 9 formulas of each constitution. The present studies carried out through clinical observations over a hundred thousand times in the past 7 years, have made it possible to obtain the results as expected in the successful classification of a total of 56 therapeutical formulas into 'Fundamental Formula', 'Vitalization Formula', 'Bactericidal Formula', 'Paralysis Formula', 'Psycho Formula' and 'Inflammation Formula', This paper deals mainly with these formulas of the 8 constitutions. The symbols and terms used herein are those which have been revised after the first paper was reported. For the convenience of the reader, the revised symbols and terms are explained hereunder together with the illustration of simplified constitutional pulse diagnosis. This paper represents the second report published in the Korean Central Journal of Medicine in September, 1973. It is noted, however, that the figures and formulas created or methodized by the author are defined as the 'Kuan's Figure' and 'Kuan's Formula Table' with fixed serial number respectively.

Hysteretic Behavior and Restoring Force Model of Specimens of Square Concrete-Filled CFRP-Steel Tubular Beam-Column

Kuan Peng,Yong-Bo Shao,Qing-li Wang,Yi-Fang Cao 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.2

To study the hysteretic behavior of specimens of square concrete-fi lled CFRP-steel tube under diff erent infl uencing factors, a total of 12 specimens are designed, and the failure modes and P - Δ curves are investigated from experimental test. The simulation software ABAQUS is used to build the numerical model to study P - Δ curves and deformation mode of specimens. Based upon the tri-linear model, the restoring force model of square concrete-fi lled CFRP-steel tube is proposed, and the results of the tri-linear model are compared with those of the fi nite element model. The test results reveal that P - Δ curves of specimens are plump, and all specimens demonstrate excellent hysteretic behavior. The P - Δ curves, the skeleton curves and the deformation mode of specimens are reproduced by fi nite element model. The accuracy of the simulation results is verifi ed by comparing numerical results with experimental results. In terms of the restoring force model, a satisfactory agreement is achieved by comparing predicted results of tri-linear model with fi nite element simulations.

Generation of Acoustic waves using TAL pair

Kuan Chen 한국에너지기후변화학회 2010 에너지기후변화학회지 Vol.5 No.2

Two identical TA (ThermoAcoustic) lasers were constructed, tested, and characterized for the generation and manipulation of high-amplitude acoustic waves from heat. Pyrex glass tubes with one open end and ceramics used in automobile catalytic converters were employed to fabricate the TA lasers. The ceramic stack in each TA laser was heated by NiCr (nichrome) resistance heater wire at one end, and cooled at the other end by radiation and natural convection of atmospheric air. Generated acoustic energy and sound waves were analyzed for different power supply rates and laser position arrangements. Changes in wave amplitude and phase difference due to triggered excitation and cross talking of the two lasers were investigated. Also tested and characterized were the focusing and synchronization of the two TA laser outputs to manipulate the acoustic energy intensity. It was found the sound waves generated by a pair of identical TA lasers were almost 180 degrees out of phase when the openings of the two lasers were very close to each other, resulting in much lower sound energy level at the focusing point. When the two lasers were far apart, the phase difference between the sound waves of the two lasers varied with time. Amplitudes of both sound waves increased slightly when the two laser output waves were in phase.

Case Series of Osmotic Demyelination Syndrome Treated With Plasmapheresis: Experience From Two Tertiary Hospitals

Kuan Yee Lim,Yuen Kang Chia,Ching Soong Khoo,Hui Jan Tan 대한신경과학회 2022 Journal of Clinical Neurology Vol.18 No.1

Analysis of Molecular Markers Associated with Yield-Related Traits of Tomatoes under Heat Stress

Kuan-Hung Lin,Halao-Feng Lo,Shao-Pei Lee,Wei-Lun Yeh 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Chlorophyll-Related Compounds Inhibit Cell Adhesion and Inflammation in Human Aortic Cells

Kuan-Hung Lin,Ching-Yun Hsu,Ya-Ping Huang,Jun-You Lai,Wen-Bin Hsieh,Meng-Yuan Huang,Chi-Ming Yang,Pi-Yu Chao 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.10

The objectives of this study were to investigate the effects of chlorophyll-related compounds (CRCs) and chlorophyll (Chl) a + b on inflammation in human aortic endothelial cells. Adhesion molecule expression and interleukin (IL)-8, nuclear factor (NF)-jB p65 protein, and NF-jB and activator protein (AP)-1 DNA binding were assessed. The effects of CRCs on inflammatory signaling pathways of signal transducers and activators of transcription 3 (STAT3) and mothers against decapentaplegic homolog 4, respectively induced by IL-6 and transforming growth factor (TGF)-b, in human aortic smooth muscle cells cultured in vitro were also investigated. HAECs were pretreated with 10 lM of CRCs, Chl a + b, and aspirin (Asp) for 18 h followed by tumor necrosis factor (TNF)-a (2 ng/mL) for 6 h, and U937 cell adhesion was determined. TNF-a–induced monocyte-endothelial cell adhesion was significantly inhibited by CRCs. Moreover, CRCs and Chl a + b significantly attenuated vascular cell adhesion molecule-1, intercellular adhesion molecule-1, and IL-8 expressions. Treatments also significantly decreased in NF-jB expression, DNA binding, and AP-1 DNA binding by CRCs and Asp. Thus, CRCs exert anti-inflammatory effects through modulation of NF-jB and AP-1 signaling. Ten micromoles of CRCs and Asp upregulated the expression of mothers against decapentaplegic homolog 4 (Drosophila) (SMAD4) in the TGF-b receptor signaling pathway, and SMAD3/4 transcription activity was also increased. Ten micromoles of CRCs were able to potently inhibit STAT3-binding activity by repressing IL-6–induced STAT3 expression. Our results provide a potential mechanism that explains the anti-inflammatory activities of these CRCs.