편측안면경련의 미세혈관 감압술시 안면근전도의 수술중 감시 : 임상연구 Clinical Research

이강운,고원일,최영근,박주현,백민우,강준기 대한신경외과학회 1997 Journal of Korean neurosurgical society Vol.26 No.9

흉선 종양과 관련된 중증근무력증의 임상적 특성

강동화,김호진,김지수,이근호,이광우 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

FeCoB계 아몰퍼스 자성박막의 임피던스효과에 관한 연구

서강수,정승우,임재근,신용진 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-

In this paper, we has studied frequency dependence of impedance of FeCoB amorphous magnetic films. First, we investigated optimal composition and sputtering conditions for fabrication of zero magnetostrictive amorphous magnetic films. (Fe_(1-x)Co_x)_79Si_2B_19 was selected as the basic composition and then, the films were fabricated with x=0.94 and 0.95 respectively by using sputtering method at high frequency. In order to relieve the internal pressure and derive the magneto-anisotropic. we annealed the films in about 150[Oe] of magnetic field and in the range(280℃, 300℃ and 320℃ respectively) of crystallization temperature(360℃). In addition, we annealed the films under non-magnetic field and near crystallization temperatures (283℃/30min, 400℃/30min and 400℃/1hr respectively) in order to decrease magnetoanisotropic. Then, we investigated magnetic properties including magneto-impedence and inductance. As the results, we found excellent magnetic characteristics and high impedence changing rate(4.52[%/Oe]) when we fabricated a sample under the condition that input power 400[W], Ar gas pressure 6.4[mTorr]. sputtering time 30[min] and annealing time 30[min] at 300[℃] in 150[Oe] magnetic field Especially, the impedence changing rate which was basic characteristic of Ml element was 4.52[%/Oe] for x=0.94. Moreover, the inductance values of the samples annealed at 400[℃/30min] were higher by 132[%] to 197[%] than those of the non-annealed samples. In addition, the quality factor Q was below 0.7 for all samples. Consequently, we find that the zero magnetostrictive amorphous magnetic film can be used as a magnetic sensor material.

900MHz대 수동형 RFID 휴대 리더스 소형 원편파 안테나

최익권,강민식,이우태 충북대학교 컴퓨터정보통신 연구소 2006 컴퓨터정보통신연구 Vol.14 No.1

본 논문에서는 휴대용 RFID(Radio Frequency IDentification)리더안테나로 중심주파수 911MHz인 소형 원편파 마이크로스트립안테나를 설계 제작하였다. 안테나는 대칭모서리가 절단된 정사각형 형태를 채택하였으며 유전체기판은 유전율 4.4, 손실탄젠트 0.02인 FR4기판을 사용하였다. 설계에는 상용 시뮬레이션 도구인 ANSOFT 사의 DESIGNER V2 와 HFSS를 사용하였다. 제작된 안테나는 두께가 8mm, 크기가 130mm × 130mm로 소형이면서, -10dB 대역폭이 870MHz ~ 950MHz, 이득 4.4dB 그리고 축비가 3.42 dB로 비교적 우수한 특성을 가짐을 측정을 통해 확인하였다. In this paper, small size circularly polarized microstrip patch antenna for portable RFID reader antenna with a center frequency 911MHz is designed and fabricated. The antenna is of a corner truncated type and is fabricated with FR4 dielectric board of dielectric constant 4.4 and loss tangent 0.02. The DESIGNER V2 and HFSS simulation tools of ANSOFT corporation are used in the antenna design. The fabricated antenna is 8mm thick and as small as 130mm by 130mm in size. It's -10dB bandwidth, gain and axial ratio are shown to be 870MHz ~ 950MHz, 4.4dB and 3.42dB, respectively, by measurements.

플라보노이드의 세포 신호전달 조절

이응룡,강근호,강용진,김우열,최혜연,김봉우,정효순,조쌍구 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

Many studies revealed the neuroprotective, cardioprotective, and chemopreventive actions of dietary flavonoids. The plausible mechanistic interpretation of the various effects of flavonoids was concentrated on the anti-oxidant or free radical-scavenging properties of these phytochernicals, both in model systems and under in vivo conditions. While there has been a major focus on the anti-oxidant properties. there is an emerging view that flavonoids and their in vivo metabolites. do not act as conventional hydrogen-donating anti-oxidants. but they may exert regulatory functions in cells through actions at protein kinase or lipid kinase signaling pathways. Flavonoids and more recently their metabolites. have been reported to act at phosphoinositide 3-kinase(PI 3-kinase). Akt/protein kinase B(Akt/PKB), protein kinase C (PKC), mitogen activated protein kinase(MAP kinase), and various tyrosine kinases signaling cascades. Inhibitory or stimulatory actions at these pathways are likely to affect cellular function profoundly by altering the phosphorylation state of target molecules and by modulating gene expression. A clear understanding of the mechanisms of action of flavonoids, either as anti-oxidants or modulators of cellular signaling pathways, and the influence of their metabolism on these properties are key to the evaluation of these potent biomolecules as anti-cancer agents, cardio-protectants, and inhibitors of neurodegeneration.

국내육성 오차드그라스 품종들의 캘러스 형성율 및 식물체 재분화 효율

김기용,강경민,배은경,이인애,임용우,최기준,박근제,손대영,조진기 Plant molecular biology and biotechnology research 2003 Plant molecular biology and biotechnology research Vol.2003 No.-

Comparisons of callus formation ratios from seed explants, callus sizes, regeneration ratios from callus and regeneration efficiency for 4 orchardgrass (Dactylis glomerata L.) varieties (Three were developed in Korea and one was imported from foreign nation) are as follows; Jangbeol 102 (67.0%) has the highest callus formation ratio in 4 weeks incubated callus after bedding the seed explants, but Potomac (68.4%) has the highest ratio in 6-seek callus. Potomac (3.93cm) has the highest callus size in 4-week callus, but Jangbeol 101 (4.32cm) has the highest size in 6-week callus. Jangbeol 101 (17.7%) has the highest plant regeneration ratio in 4-week callus, but Potomac (37.4%) has the highest raion in 6-week callus. Jangbeol 102 (11.5%) has the highest plant regeneration efficiency in 4-week callus, but Potomac (25.6%) has the highest efficiency in 6-week callus.

복어중독에 의한 가사 상태에서 소생한 1예

송승찬,신진호,강석우,박경남,최호순,박근태,문희식,기춘석,이성희,윤병철,노우균,조균석,이민호 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.3

Tetrodotoxin is a neurotoxin produced by about 90 species of puffer fish and causes paralysis of central nervous system and peripheral nerves by blocking the movement of all monovalent cation. Ingestion of tetrodotoxin produces clinical manifestations such as paresthesias(within 10-45 min), vomiting, lightheadedness, salivation, muscle twitching, dysphagia, difficulty in speaking, convulsion and death that expressed by cardiopulmonary arrest with loss of brain stem reflex sometimes. Tetrodotoxin prevents or delays ischemia induced neuronal death by way of following 3 mechanisms. Firstly, it reduces the energy demand of the brain tissues. Secondly, it delays or even prevents anoxic depolarization. Finally, it deminishes ischemia induced cell swelling and cerebral edema. We report a case of puffer fish poisoning which presented with cardiopulmonary arrest and loss of brain stem reflex, but completely recovered by aggressive cardiopulmonary resuscitation.

최대 암에르고미터 운동 시 경험 유·무에 따른 척수 장애인의 환기역치 비교

김태수,김성수,윤성진,황부근,이동희,이강우 한국특수체육학회 2004 한국특수체육학회지 Vol.12 No.3

The purpose of this study was to determine the effect of state for training at the VT using other relative physical factors as like a VT-Sec, VT-VO2peak, VT/VO2peak%, VO2peak, VT-HRpeak, VT/HRpeak%, HRpeak, with individuals with spinal cord injuries. The participants were composed of 7 spinal cord injured wheelchair basketball athletes who are involved with regular activity, 5 spinal cord injured sedentaries who are not involved any regular activity. The statistical procedures used to the analysis were unpaired T-test. The results were as follows; First, the significant differences in VT-Sec, VO2peak were observed between 2 groups. Second, the validity of 44-72VT/V O2peak% and 56.78VT/HRpeak% is suggested as an alternative exercise intensity by individuals with all spinal cord injuries.

소장내 위석에 의한 장폐쇄증으로 발생한 급성신부전 1례

김승민,남지형,김준섭,이용국,최재혁,강혁주,탁우택,이정호,정호근 東國大學校醫學硏究所 2007 東國醫學 Vol.14 No.1

Gastric bezoars are concretions or hard masses of foreign matter found in the gastrointestinal tract. It may induce many complications including intestinal obstruction. No report has been proposed on a case of prerenal ARF induced by intestinal obstruction by small-bowel bezoar. Therefore, we report a case of the patient with ARF associated with small-bowel bezoar, who initially visited with the symptoms of nausea and frequent vomiting. 위석(bezoar)은 여러 가지 이물 및 내재성물질이 위장관내에서 혼합되어 응고물을 형성한 것을 말하며, 가장 흔한 형태의 합병증으로 장폐쇄증이 올 수 있으나, 그로 인하여 신부전의 양상으로 나타나는 경우는 흔하지 않다. 이에 저자들은 내원 당시의 병력 및 이학적 검사만으로 장폐색의 원인이 위석임을 의심할 수 없었던 비전형적인 소견을 보인 소장내의 위석에 의한 장폐쇄증과 이로 인해 발생한 급성신부전의 예를 경험하였기에 이에 보고하는 바이다.

Delta Neutrophil Index is a Predictor of Disease Severity in Patients with Acute Pyelonephritis

( Geun Woo Ryu ),( Hyung Woo Kim ),( Seohyun Park ),( Sul A Lee ),( Jonghyun Jhee ),( Su-young Jung ),( Hyung Jung Oh ),( Jung Tak Park ),( Seung Hyeok Han ),( Shin-wook Kang ),( Tae-hyun Yoo ) 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.1

Background: Delta neutrophil index (DNI) is the fraction of immature granulocytes provided by a complete blood count analyzer. Previous studies demonstrated that DNI is a novel marker to predict outcomes in sepsis patients. Therefore, this study aimed to evaluate DNI as a predictor of disease severity in patients with acute pyelonephritis (APN). Methods: Patients diagnosed with APN at Severance Hospital from December 2009 to July 2012 were retrospectively investigated. DNI levels were measured at the time of admission. The patients were classified into two groups according to the median value of DNI at baseline. Severe APN was diagnosed with one or more of these conditions including bacteremia, acute kidney injury, hypotension requiring use of vasopressors and admission of intensive care unit. Independent risk factors for severe APN were determined by multiple logistic regression analysis. Receiver operating characteristic (ROC) curves were plotted for DNI, white blood cell (WBC) count and C-reactive protein (CRP). Results: A total of 258 patients were included in this study. The median age was 61.0 (19.0-87.0), 237 patients (91.9%) were female, and the median DNI level was 2.5%. Severe APN was significantly more prevalent in high DNI group. Multivariate analysis showed that DNI, WBC count and CRP level independently predicted severe APN. DNIwas a better predictive marker of severe APN than WBC count, as reflectd by area under the ROC curve analysis (0.697 [95% CI, 0.637-0.753] vs. 0.562 [95% CI, 0.499-0.624], p=0.0013). DNI was not inferior to CRP levels to predict severe APN (0.697 [95% CI, 0.637-0.753] vs. 0.633 [95% CI, 0.571-0.692], p=0.1185). Conclusions: DNI level at admission is a valuable predictor of disease severity in patients with APN.