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전체 선택해제
총 752건 검색
본문검색 결과만 보기
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A Study on the Reduction of Supersonic Cavity Pressure Oscillations Using a Sub-Cavity System
신춘식, 정준창, 김희동, Shin. Choon-Sik, Jeong. June-Chang, Suryan. Abhilash, Kim. Heuy-Dong 한국추진공학회 한국추진공학회지 7 Pages
한국추진공학회 한국추진공학회지 2009, Vol.13 No.5 41-47 (7 pages)
2차원 초음속 공동유동에서 발생하는 압력진동을 제어하기 위한 목적으로, 본 연구에서는 수치해석적 연구를 수행하였다. 본 계산에서는 압력진동을 제어하기 위하여 보조공동의 형상을 변화시켰으며, 유동의 마하수를 1.50, 1.83 그리고 2.50로 변화시켰다. 그 결과, 보조공동은 압력진동을 상당히 감소시켰으며, 압력진동의 제어효과는 유동의 마하수와 보조공동의 상세형상에 크게 의존함을 알았다. -
Investigating the Fluence Reduction Option for Reactor Pressure Vessel Lifetime Extension
Kim. Jong-Kyung, Shin. Chang-Ho, Seo. Bo-Kyun, Kim. Myung-Hyun, Kim. Dong-Kyu, Lee. Goung-Jin, Oh. Su-Jin 한국원자력학회 Journal of the Korean Nuclear Society 15 Pages
한국원자력학회 Journal of the Korean Nuclear Society 1999, Vol.31 No.4 408-422 (15 pages)
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Pressure Drop Reduction and Heat Transfer Increase with Rheological Fluid Flows in a Circular Conduit
이동렬, Lee. D.R. 한국동력기계공학회 한국동력기계공학회지 7 Pages
한국동력기계공학회 한국동력기계공학회지 2012, Vol.16 No.1 51-57 (7 pages)
본 연구는 컴팩트한 열교환기의 설계를 위하여 열교환기 내의 원형 단면 도관의 유변 유체의 압력 강하 및 대류 열전달률을 수치해석적으로 수행하였다. 유변 유체의 구성방정식은 기존의 비뉴톤 유체 멱법칙을 보완한 수정 멱법칙 모델을 채택하였다. 도관 내의 압력강하를 의미하는 마찰계수와 수정 레이놀즈 수의 곱은 기존 문헌치와 비교할 때 뉴톤 유체 영역과 유변 멱법칙 영역에서 각각 0.01% 및 0.004% 내에서 일치함을 보였고 유변 수정멱법칙 유체 모델의 형태를 띠는 유변 유체를 열교환기 내의 원형 단면 도관 내에서... -
Passive reduction of large pressure variation for a high-speed express train in a narrow tunnel using an extra dummy tunnel duct
Yun. Su-Hwan, Kwak. Min-Ho, Lee. Dong-Ho, Kwon. Hyeok-Bin, Ko. Tae-Hwan 대한기계학회 Journal of mechanical science and technology 8 Pages
대한기계학회 Journal of mechanical science and technology 2010, Vol.24 No.7 1433-1440 (8 pages)
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Comparison of the effects of different-sized airways in inspiratory trainers on maximal inspiratory pressure and rating of perceived exertion scale in healthy young people
Young-In Hwang, Ki-Song Kim 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2018, 제 7권 제 1호 4 18-22 (5 pages)
Objective: This study aimed to investigate the effect of different-sized airways of the inspiratory muscle trainer (IMT) on maximal inspiratory pressure (MIP) and the rating of perceived exertion, as measured by the modified Borg scale (m-Borg). Design: Cross-sectional study. Methods: Twenty healthy subjects (10 men, 10 women) volunteered for the study. The spirometry was used to measure MIP. The trial order of the three spirometry conditions was chosen randomly. After measuring the MIP and... -
The passive stretching, massage, and muscle energy technique effects on range of motion, strength, and pressure pain threshold in musculoskeletal neck pain of young adults
Hye Mi Jeong, Jae-Hoon Shim, Hye Rim Suh 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2017, 제 6권 제 4호 7 196-201 (6 pages)
The purpose of this study was to examine the effects of three interventions on ROM, strength, and pressure pain threshold (PPT) with musculoskeletal neck pain. Design: Pretest-posttest design. Methods: Thirty subjects participated in this experiment. They were randomly assigned to thefollowing groups: passive stretching (PS) group (n=10), massage (MASS) group (n=10), and muscle energy technique (MET) group (n=10). The treatment were applied bilaterally on the upper trapezius. The PS was applied... -
Pressure pain threshold and visual analogue scale changes in the high and low energy extracorporeal shock wave
You-Jin Yang, Seung-Joon Lee, Matthew Choi 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 2호 10 142-147 (6 pages)
of pressure pain threshold (PPT) and visual analogue scale (VAS). The high and low energy groups received focused piezo electric type ESWT 4 Hz, 1,000 pulses and 0.351 and 0.092 mJ/mm2 respectively. Outcome measures of PPT and pain was measured by algometer and pain VAS. These measurements were performed before and after treatment. Results: The PPT value was significantly increased in both groups after treatment (p<0.05) and VAS scores were significantly decreased after treatment in both groups... -
Epigallocatechin-3 gallate prevents cardiac hypertrophy induced by pressure overload in rats
Jia Hao, Chan-Hyung Kim, Tae-Sun Ha, Hee-Yul Ahn 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 2호 4 121-129 (9 pages)
Pressure overload diseases, such as valvular stenosis and systemic hypertension, manifest morphologically in patients as cardiac concentric hypertrophy. Prevention of cardiac remodeling due to increased pressure overload is important to reduce morbidity and mortality. Epigallocatechin-3 gallate (EGCG) is a major bioactive polyphenol present in green tea which has been found to be a nitric oxide-mediated vasorelaxant and to be cardioprotective in myocardial ischemia-reperfusion injury. Therefore,... -
Comparative effects of angiotensin II and angiotensin-(4-8) on blood pressure and ANP secretion in rats
HoangThiAiPhuong, LameiYu, ByungMunPark, SuhnHeeKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.6 12 667-674 (8 pages)
with inhibitor of phospholipase (PLC), inositol triphosphate (IP3) receptor, or nonspecific protein kinase C (PKC). The potency of Ang-(4-8) to inhibit ANP secretion was similar to Ang II. However, Ang-(4-8) 10 μM caused an increased mean arterial pressure which was similar to that by 1 nM Ang II. Therefore, we suggest that Ang-(4-8) suppresses high stretch-induced ANP secretion through the AT1R and PLC/IP3/PKC pathway. Ang-(4-8) is a biologically active peptide which functions as an inhibition... -
Trichostatin A Modulates Angiotensin II-induced Vasoconstriction and Blood Pressure Via Inhibition of p66shc Activation
GunKang, YuRanLee, HeeKyoungJoo, MyoungSooPark, Cuk-SeongKim, SungaChoi, ByeongHwaJeon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.5 10 467-472 (6 pages)
Histone deacetylase (HDAC) has been recognized as a potentially useful therapeutic target for car-diovascular disorders. However, the effect of the HDAC inhibitor, trichostatin A (TSA), on vasoreactivity and hypertension remains unknown. We performed aortic coarctation at the inter-renal level in rats in order to create a hypertensive rat model. Hypertension induced by abdominal aortic coarctation was significantly suppressed by chronic treatment with TSA (0.5 mg/kg/day for 7 days). Nicotinamide... -
Effects of Vitamin D on Blood Pressure and Endothelial Function
BokyungMin 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.5 2 385-392 (8 pages)
Vitamin D deficiency is prevalent, primarily due to limited sun exposure, which may be observed in urban areas, or as a result of modern lifestyles. Common myths about vitamin D persist, including that it is mostly obtained from the diet and is only essential for bone and mineral homeostasis. Nonetheless, advances in biomedical science suggest that vitamin D is a hormone that is integral to numerous physiologic functions in most cells and tissues. Therefore, abnormal vitamin D levels may... -
Additive Role of the Vestibular End Organ and Baroreceptors on the Regulation of Blood Pressure in Rats
YanLan, Yan-ZhaoYang, XianJiang, Li-WeiLi, Guang-ShiJin, MinSunKim, ByungRimPark, Yuan-ZheJin 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.4 15 367-373 (7 pages)
reduced c-Fos protein expression than that in the BL group, and the SAD＋BL group showed less expression than that in the SAD group. These results suggest that the vestibular system cooperates with baroreceptors to maintain arterial pressure during hypotension but that baroreceptors regulate arterial pressure during both hypotension and hypertension. Additionally, afferent signals for maintaining blood pressure from the vestibular end organs and the baroreceptors may be integrated in the RVLM. -
Effects of Central GABA and Glutamate on Blood Pressure and Single Unit Spikes in the RVLM of Rats
JaeSikPark, ZeeIhnLee, JaeHeeJang, DongKukAhn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.3 4 149-154 (6 pages)
The blood pressure (BP) is regulated by the nervous system and humoral factors, such as renin- angiotensin system, vasopressin and others. In the present study, we examined the central effects of glutamate and GABA on the cardiovascular regulation by injection of these substances into the lateral ventricle and also investigated the relationship between these central effects and the action of angiotensin II (Ang). Male Sprague Dawley rats, 350∼400 g, were anesthetized with urethane and... -
Do Opioid Receptors Play a Role in Blood Pressure Regulation?
Rhee H.M., J.W. Holaday, J.B. Long, M.D. Gaumann, T.L. Yaksh, G.M. Tyce, W.R. Dixon, A.P. Chang, J.A. Mastrianni, R. Mosqueda-Garcia, G. K 대한약리학회 대한약리학잡지 12 Pages
대한약리학회 대한약리학잡지 1988, 제 24권 제 2호 1 153-164 (12 pages)
In anesthetized rabbits met-enkephalin decreased blood pressure and heart rate, which closely paralleled a reduction in sympathetic discharge. Naloxone, but not naloxone methobromide, antagonized these effects, which suggests a central site of action of met-enkephalin. A number of autonomic agents, particularly adrenergic α-and, β-agonists and antagonists modify the cardiovascular actions of met-enkephalin. Experiments in reserpine-treated and adrenalectomized rats provide no evidence of... -
Effect of Blood Pressure on the Endothelium-Dependent Contraction in Rat Aorta
Jeon, Byeong-Hwa, Kim, Hoe-Suk, Kim, Se-Hoon, Chang, Seok-Jong 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1996, 제 30권 제 1호 3 21-32 (12 pages)
of reduction of endothelium-dependent contraction was greater in SHR which was prevented from developing hypertension than in SHR of which high blood pressure was suppressed. 4. In aortic rings from 1K,1C-GBH rats, endothelium-dependent contractions by acetylcholine were augmented as compared with WKY. 5. There is good relationship between the value of blood pressure and magnitude of endothelium-dependent contraction. Thus, it is suggested that increased endothelium-dependent contraction in... -
Effects of Ethanol on Neurohumoral Mechanisms for Blood Pressure Regulation in Hemorrhaged Conscious Rats
Park, Yoon-Yub, Park, Jae-Sik, Lee, Won-Jung 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 1호 9 91-102 (12 pages)
of reduction of [Li+] in the AF was also retarded by vasopressin or prolactin injection. 3. The rate of reduction of [Li+] in the AF was less retarded by vasopressin than that of [CR]. 4. [Na+] changed to approach to the normal level, but this was markedly retarded by prolactin injection. 5. Direction of Li+ movement was correlated with the change in [Na+] but it always moved out of the amniotic sac even when the [Na+] increased in vasopressin injected AF. From the above results, it is suggested... -
Ventilatory Responses to Continuous Negative Pressure Breathing(CNPB) in Awake Dogs
Cha, Eun-Jong, Goo, Yong-Sook 대한생리학회 대한생리학회지 14 Pages
대한생리학회 대한생리학회지 1993, 제 27권 제 1호 4 37-50 (14 pages)
Ventilatory responses to inhaled CO2 were measured during continuous negative pressure breathing (CNPB) in awake dogs. End expiratory lung volume (EELV) decreased linearly with pressure level during CNPB (correlation coefficient= 0.81, p<0.005) during air breathing. When CNPB was applied during 5% CO2 inhalation, the decrease in EELV was not significantly different (p<0.5) from that during air breathing. As a result of a lowered EELV, tidal volume (VT) significantly decreased by 22% and... -
Physiology of Man under High Pressure
Hong Suk-Ki 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1988, 제 22권 제 2호 1 153-162 (10 pages)
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Evaluation of Bt-cotton Genotypes for Resistance to Cotton Leaf Curl Disease under High Inoculum Pressure in the Field and Using Graft Inoculation in Glasshouse
한국식물병리학회 The Plant Pathology Journal 8 Pages
한국식물병리학회 The Plant Pathology Journal 2015, 31권 2호 5 132-139 (8 pages)
with SI values of 5.0 to 5.4 while remaining 64 were highly susceptible with SI values of 5.5 to 6.0. Inoculated plants of all tested genotypes exhibited severe disease symptoms within 10 days after the appearance of initial symptoms. No reduction in SI value was observed until the end of the experiment i.e., 90 days after grafting. Information generated under the present study clearly demonstrates that no sources of resistance to CLCuD are available among the tested Bt-cotton genotypes. So, a... -
Inhalation of Clary Sage Oil before Chemotherapy Alleviates Anxiety and Stress without Changing Blood Pressure: A Randomized Controlled Trial
Kim Moonsuk, Shin You Kyoung, Seol Geun Hee 한국기초간호학회 Journal of Korean Biological Nursing Science 9 Pages
한국기초간호학회 Journal of Korean Biological Nursing Science 2021, Volume 23, No 4 2 267-275 (9 pages)
oil or pure almond oil (control). State-trait anxiety inventory (STAI), Stress rating scale, anxiety-visual analog scale (Anxiety-VAS), stress-visual analog scale (Stress-VAS), blood pressure, and heart rate were measured before and after the inhalation prior to undergoing chemotherapy. Results: Anxiety-VAS and Stress-VAS were significantly lower after than before inhalation of clary sage oil (p<.01 and p<.05, respectively) and linalyl acetate (p<.05 and p<.05, respectively), despite having no... -
Study on properties of eco-friendly reduction agents for the reduced graphene oxide method
Young-il Na, Young Il Song, Sun Woo Kim, Su-Jeong Suh 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 1 1-9 (9 pages)
of reduced graphene oxide (rGO) prepared using eco-friendly reduction agents in the graphene solution process. Hydrazine is generally used to reduce graphene oxide (GO), which results in polluting emissions as well as fixed nitrogen functional groups on different defects in the graphene sheets. To replace hydrazine, we developed eco-friendly reduction agents with similar or better reducing properties, and selected of them for further analysis. In this study, GO layers were produced from graphite... -
Influence of hot-pressing pressure on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija and Sharad Chandra Sharma 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 4 25-33 (9 pages)
The prime objective of this research was to study the influence of hot-pressing pressure and matrix-to-reinforcement ratio on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon-composite. Secondary objectives included determination of the physical and mechanical properties of the resulting composite. The ‘hybrid carbon-fiberreinforced mesophase-pitch-derived carbon-matrix’ composite was fabricated by hot pressing. During hot pressing, pressure was varied from 5... -
A Suggestion of an Empirical Equation for Shear Modulus Reduction Curve Estimation of Sandy Soils
Park. Dug-Keun 한국지반공학회 韓國地盤工學會論文集 12 Pages
한국지반공학회 韓國地盤工學會論文集 2002, Vol.18 No.3 127-138 (12 pages)
지진에 의한 지반거동 및 지반-구조물 상호작용 등 지반동역학적 문제분석을 위해서는 정확한 동적 토질전단탄성계수의 획득이 필수적이다. 본 연구에서는 기존의 자료를 조사분석하여 어떤 변형율에서도 활용할 수 있는 사질토 전단탄성계수 감소곡선을 위한 경험식을 제안하였다. 비소성 토질의 전단탄성계수 감소곡선의 위치와 모양은 평균유효구속압에 주로 영향을 받으므로 본 연구에서는 이 영향요소 및 최대전단탄성계수를 이용하여 변형을 증가에 의한 전단탄성계수 감소를 산정할 수 있는 방정식을 형성하였다.... -
Influence of Pressure Variation Inside the Snubber on Reciprocating Hydrogen Compression System
라흐만, 이경환, 우주식, 토니, 정한식, 정효민, Rahman. M.Sq., Lee. G.H., Woo. J.S., Utomo. T.S., Chung. H.S., Jeong. H.M. 한국동력기계공학회 한국동력기계공학회지 7 Pages
한국동력기계공학회 한국동력기계공학회지 2009, Vol.13 No.2 42-48 (7 pages)
본 실험에서는 왕복동식 수소 압축 시스템에서 다양한 스너버 압력변화와 스너버 효과를 조사가 수행되었다. 압력값은 실험적인 방법으로 스너버 시스템에서 각각 6군데에서 압력 값을 측정하였다. 그리고 아크릴 스너버에서의 입, 출구의 압력진폭은 FFT로 얻어진다. 맥동압 감소는 결과의 입, 출구의 진폭으로써 계산되어진다. 이는 각각의 모터 주파수 30, 40, 50Hz에서 각각 58.248%, 57.026%, 56.871%의 맥동압 감소가 일어난다. 압력 손실은 각각의 모터주파수 30, 40, 50Hz에서 0.960%, 1.533%, 1.965% 손실값이 발생한다....
