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2단 구조를 사용한 250MS/s 8비트 CMOS 폴딩-인터폴레이팅 AD 변환기
이돈섭, 곽계달 한국해양정보통신학회 한국해양정보통신학회논문지 7 Pages
한국해양정보통신학회 한국해양정보통신학회논문지 2004, Vol.8 No.4 826-832 (7 pages)
본 논문에서는 VLSI의 내장 회로로 사용하기에 적합한 CMOS 8 비트 폴딩-인터폴레이팅 AD 변환기를 설계하였다. 폴딩 AD 변환기의 비선형성을 개선하기 위하여 입력신호의 폴딩-인터폴레이팅에 의한 신호처리가 차례로 2 번 반복되는 2 단 구조를 사용하였다. 이 구조에서는 2 번째 폴딩 회로로서 트랜지스터 차동쌍을 이용한다. 2 단 폴딩 ADC는 디지틸 출력을 얻기 위한 전압비교기와 저항의 개수를 현저히 줄일 수 있으므로 칩 면적, 소비전력, 동작속도 둥에서 많은 장점을 제공한다. 설계공정은 0.25$mu$m double-poly 2 metal... -
고속 임베디드 시스템 응용을 위한 CMOS AD 변환기 설계
권승탁, Kwon. Seung-Tag 한국통신학회 한국통신학회논문지. The Journal of Korea Information and Communications Society. 통신이론 및 시스템 8 Pages
한국통신학회 한국통신학회논문지. The Journal of Korea Information and Communications Society. 통신이론 및 시스템 2008, Vol.33 378-385 (8 pages)
본 논문은 고속 임베디드 시스템에 사용하기 위해 CMOS AD 변환기(Analog-to-Digital Converter)를 설계하였다. 이 AD 변환기는 효율적인 구조로 설계하기 위하여 전압을 예측할 수 있는 플래시 AD 변환기와 자동 영을 기반으로 하여 설계된 비교기를 사용하였다. 이 구조의 변환속도는 기존의 플래시 AD 변환기와 거의 같지만 비교기와 연결된 회로가 줄어들었기 때문에 전체 회로의 크기를 크게 줄일 수 있었다. 이 ADC는 $0.25{mu}m$ 디지털 CMOS 기술로 구현되었다. -
마이크로프로세서를 이용한 자기카메라 전용 임베디드형 AD 변환기 및 잡음 감소에 관한 연구
이진아, 황지성, 송하용, Lee. Jin-Yi, Hwang. Ji-Seong, Song. Ha-Ryong 한국비파괴검사학회 비파괴검사학회지 9 Pages
한국비파괴검사학회 비파괴검사학회지 2006, Vol.26 No.2 99-107 (9 pages)
및 컴퓨터에 의하여 저장, 영상화 및 처리된다. 그러나, 지급까지의 자기카메라는 범용 AD변환기를 사용하기 때문에 변환 및 스위칭속도, 검출범위 및 분해능, 직접 메모리 액세스(DMA, direct memory access), 임시저장속도 및 저장량에 한계점을 가지고 있었다. 또한, S/N비를 높이기 위하여 OP-AMP의 도입, 신호의 증폭, 배선의 감소, LPF의 사용과 팥은 개선된 기술이 필요하다. 본 논문은 상술한 조건들을 만족하기 위하여 OP-AMP, LPF, 마이크로프로세서 및 DMA 회로를 포함한 자기카메라 전용 임베디드형 AD 변환기를 제안한다. -
SOC 응용을 위한 효율적인 8비트 CMOS AD 변환기 설계
권승탁, Kwon. Seung-Tag 대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. SD, 반도체 7 Pages
대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. SD, 반도체 2008, Vol.45 No.12 22-28 (7 pages)
논문은 SOC 응용을 위한 효율적인 8비트 AD 변환기(Analog-to-Digital Converter)를 설계하였다. 이 구조는 2개의 수정된 4 비트 플래시 AD 변환기로 구성되었고, 그것은 기존의 플래시 AD 변환기 보다 더 효율적인 구조를 가지고 있다. 이것은 입력신호에 연결된 저항들의 일정 범위를 예측하고 초기 예측을 기반으로 입력신호에 가까운 위치를 정한다. 입력신호의 예측은 전압예측기에 의하여 가능하다. 4비트 해상도를 가진 경우 수정된 플래시 AD 변환기는 단지 6개의 비교기가 필요하다. 그러므로 8비트 AD 변환기는 12개의 비교기와... -
The effect of co-contraction exercises of abdominal bracing combined with ankle dorsiflexion on abdominal muscle thickness and strength in patients with chronic low back pain
Wenlan Chai, So Hee Lee, Yu Hyung Park 물리치료재활과학회 Physical Therapy Rehabilitation Science 8 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 2호 3 93-100 (8 pages)
ABDF group compared with the AB group (p<0.05). Also, the strength at 48° strength showed a significant improvement in the ABDF group than the AB group (p<0.05). Conclusions: The study results showed that abdominal muscle contraction exercises with AD in patients with LBP had an influence on abdominal muscle thickness and strength. Therefore, these findings suggest that ABDF may be useful approach for enhancement of abdominal muscle thickness and strength in patients with chronic low back pain. -
The use of laser Doppler blood flow to assess the effect of acute administration of vitamin D on micro vascular endothelial function in people with diabetes
Jerrold Petrofsky, Faris Alshammari, Iman Akef Khowailed, Riya Lodha, Pooja Deshpande, Praveen Rajaram, Mahendra Gaikwad, Vidhi Vadera 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2013, 제 2권 제 2호 1 63-69 (7 pages)
Objective: To assess the effect of vitamin D administration on the skin blood flow response to occlusion and heat. Design: Cross-sectional study. Methods: Twenty age matched subjects; 10 who had diabetes and 10 who were controls were administered 4,000 IU of vitamin D3 for 3 weeks at breakfast. The function of the endothelial cells was evaluated in 2 ways; first, the response to 4 minutes of vascular occlusion of the skin was measured with a laser Doppler flow meter. Second, the skin blood flow... -
The effect of coenzyme Q10 on endothelial function in a young population
Jerrold Petrofsky, M. Laymona, H. Lee, E. Hernandez, D. Dequine, L. Thorsen, R. Lovell, J. Andrade 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2012, 제 1권 제 1호 2 6-12 (7 pages)
Objective: Coenzyme (CoQ10) is an enzymatic co factor used in normal cellular metabolism. Recent evidence shows that in people with heart disease it can reverse endothelial cell damage in the blood vessels. It is also a potent antioxidant. Design: One group pretest-posttest design. Methods: In the present study, endothelial function was evaluated using the response to occlusion and heat before and 2 weeks after administration of CoQ10, 300 mg/day. Thirty Eight subjects, who are physical therapy... -
Organotypic slice culture of the hypothalamic paraventricular nucleus of rat
Eun Seong Cho, So Yeong Lee, Jae-Yong Park, Seong-Geun Hong, Pan Dong Ryu 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 1호 3 15-20 (6 pages)
Organotypic slice cultures have been developed as an alternative to acute brain slices because the neuronal viability and synaptic connectivity in these cultures can be preserved well for a prolonged period of time. This study evaluated a stationary organotypic slice culture developed for the hypothalamic paraventricular nucleus (PVN) of rat. The results showed that the slice cultures maintain the typical shape of the nucleus, the immunocytochemical signals for oxytocin, vasopressin, and... -
Reactive oxygen species increase neuronal excitability via activation of nonspecific cation channel in rat medullary dorsal horn neurons
HaeInLee, ByungRimPark, SangWooChun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.4 2 371-376 (6 pages)
The caudal subnucleus of the spinal trigeminal nucleus (medullary dorsal horn; MDH) receives direct inputs from small diameter primary afferent fibers that predominantly transmit nociceptive information in the orofacial region. Recent studies indicate that reactive oxygen species (ROS) is involved in persistent pain, primarily through spinal mechanisms. In this study, we aimed to investigate the role of xanthine/xanthine oxidase (X/XO) system, a known generator of superoxide anion (O2·-), on... -
Potentiation of decursinol angelate on pentobarbital-induced sleeping behaviors via the activation of GABAA-ergic systems in rodents
JaeHoonWoo, Tae-WooHa, Jae-SeonKang, JinTaeHong, Ki-WanOh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.1 4 27-36 (10 pages)
Angelicae Gigantis Radix (AGR, Angelica gigas ) has been used for a long time as a traditional folk medicine in Korea and oriental countries. Decursinol angelate (DCA) is structurally isomeric decursin, one of the major components of AGR. This study was performed to confirm whether DCA augments pentobarbital-induced sleeping behaviors via the activation of GABAA-ergic systems in animals. Oral administration of DCA (10, 25 and 50 mg/kg) markedly suppressed spontaneous locomotor activity. DCA also... -
Sex Differences in Hippocampal Neuronal Sensitization by Nicotine in M. gerbils
Young-NaHur, JoonLee, Seung-ChanSohn, Chung-GilWon, Hyung-HaLee, Dong-HoonKim, Sang-HyunChoi, Kyung-HoShin, Boe-GwunChun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.5 4 405-409 (5 pages)
We studied the sex different nicotine effect on evoked population spike amplitudes (ePSA) and connexin (Cx) expression in the hippocampus CA1 area of gerbils. Acute doses of nicotine bitartrate (0.5 mg/kg: NT-0.5) slightly reduced ePSA in males but markedly augmented that in females. Acute NT (5.0 mg/kg) markedly increased the ePSA in all gerbils. Unlike acute NT-0.5, repeated NT-0.5 injection (twice a day for 7 days) significantly increased the ePSA in males and slightly affected the NT-0.5... -
Korean Red Ginseng Induced Cardioprotection against Myocardial Ischemia in Guinea Pig
KyuHeeLim, Chang-WonKang, Jin-YongChoi, Jong-HoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.4 5 283-289 (7 pages)
This study was designed to evaluate the protective effect of Korean red ginseng (KRG) against ischemia/reperfusion (I/R) injury in isolated guinea pig heart. KRG has been shown to possess various ginsenosides, which are the major components of Panax ginseng. These components are known naturally occurring compounds with beneficial effects and free radical scavenging activity. The heart was induced to ischemia for 60 min, followed by 120 min reperfusion. The hearts were randomly allocated into... -
Effects of Human Mesenchymal Stem Cell Transplantation Combined with Polymer on Functional Recovery Following Spinal Cord Hemisection in Rats
JiSooChoi, JoongWooLeem, KyungHeeLee, Sung-SooKim, HaeyoungSuh-Kim, SeJungJung, UnJengKim, BaeHwanLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.6 6 405-411 (7 pages)
The spontaneous axon regeneration of damaged neurons is limited after spinal cord injury (SCI). Recently, mesenchymal stem cell (MSC) transplantation was proposed as a potential approach for enhancing nerve regeneration that avoids the ethical issues associated with embryonic stem cell transplantation. As SCI is a complex pathological entity, the treatment of SCI requires a multipronged approach. The purpose of the present study was to investigate the functional recovery and therapeutic... -
Effects of Isoflurane Anesthesia on Post-Anesthetic Sleep-Wake Architectures in Rats
Hwan-SooJang, Ji-YoungJung, Kwang-HoJang, Maan-GeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.5 7 291-297 (7 pages)
2 hours with ad libitum sleep (Control), sleep deprivation (SD), and isoflurane anesthesia with delta- wave-predominant state (ISO-1) or burst suppression pattern-predominant state (ISO-2) with at least a 1-week interval. Electroencephalogram and electromyogram were recorded and sleep-wake architecture was evaluated for 4 hours after each treatment. In the post-treatment period, the duration of transition to slow-wave-sleep decreased but slow wave sleep (SWS) increased in the SD group, but no... -
The Effects of Tramadol on Electroencephalographic Spectral Parameters and Analgesia in Rats
Hwan-SooJang, Il-SungJang, Maan-GeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.3 12 191-198 (8 pages)
The effects of different doses of tramadol on analgesia and electroencephalographic (EEG) spectral parameters were compared in rats. Saline or tramadol 5, 10, 20 or 40 mg/kg was administered. The degree of analgesia was evaluated by tail-flick latency, and the degree of seizure was measured using numerical seizure score (NSS). Additionally, band powers, median power frequency and spectral edge frequency 95 were measured to quantify the EEG response. All doses of tramadol produced spike-wave... -
Role of Dopamine Receptors on Electroencephalographic Changes Produced by Repetitive Apomorphine Treatments in Rats
HwanSooJang, JiYoungKim, SangHeonKim, Maan-GeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.3 2 147-151 (5 pages)
Repeated psychostimulants induce electroencephalographic (EEG) changes, which reflect adaptation of the neural substrate related to dopaminergic pathways. To study the role of dopamine receptors in EEG changes, we examined the effect of apomorphine, the dopamine D1 receptor antagonist, SCH-23390, and the D2 receptor antagonist, haloperidol, on EEG in rats. For single and repeated apomorphine treatment groups, the rats received saline or apomorphine for 4 days followed by a 3-day withdrawal... -
Protein Kinase C Activates ATP-sensitive Potassium Channels in Rabbit Ventricular Myocytes
NariKim, JaeBoumYoum, HyunJoo, HyungkyuKim, EuiyongKim, JinHan 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.4 1 187-194 (8 pages)
Several signal transduction pathways have been implicated in ischemic preconditioning induced by the activation of ATP-sensitive K (KATP) channels. We examined whether protein kinase C (PKC) modulated the activity of KATP channels by recording KATP channel currents in rabbit ventricular myocytes using patch-clamp technique and found that phorbol 12,13-didecanoate (PDD) enhanced pinacidil-induced KATP channel activity in the cell-attached configuration; and this effect was prevented by... -
Differential Effects of Typical and Atypical Antipsychotics on MK- 801-induced EEG Changes in Rats
JeeSookKwon, KiMinKim, SuMinChang, Choong-YoungKim, TaiHoChung, Byung-JuChoi, MaanGeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.1 3 17-22 (6 pages)
We examined whether the abnormal EEG state by NMDA receptor blocker MK-801 can be reversed by typical and atypical antipsychotics differentially by comparing their spectral profiles after drug treatment in rats. The spectral profiles produced by typical antipsychotics chlorpromazine (5 mg/kg, i.p.) and haloperidol (0.5 mg/kg, i.p.) were differ from that by atypical antipsychotic clozapine (5 mg/kg, i.p.) in the rats treated with or without MK-801 treatment (0.2 mg/kg, i.p.) which produce... -
Effects of Central Interleukin-1 on the Cardiovascular Response in Hemorrhaged Rats
JoonHoKang, JaeHeeJang, DongKukAhn, JaeSikPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.2 4 89-94 (6 pages)
The arterial pressure is regulated by the nervous and humoral mechanisms. The neuronal regulation is mostly carried out by the autonomic nervous system through the rostral ventrolateral medulla (RVLM), a key area for the cardiovascular regulation, and the humoral regulation is mediated by a number of substances, including the angiotensin (Ang) II and vasopressin. Recent studies suggest that central interleukin-1 (IL-1) activates the sympathetic nervous system and produces hypertension. The... -
Thiol-dependent Redox Mechanisms in the Modification of ATP-Sensitive Potassium Channels in Rabbit Ventricular Myocytes
JinHan, NariKim, DangVanCuong, ChunghuiKim, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.1 4 15-23 (9 pages)
Cellular redox state is known to be perturbed during ischemia and that Ca2 and K channels have been shown to have functional thiol groups. In this study, the properties of thiol redox modulation of the ATP-sensitive K (KATP) channel were examined in rabbit ventricular myocytes. Rabbit ventricular myocytes were isolated using a Langendorff column for coronary perfusion and collagenase. Single-channel currents were measured in excised membrane patch configuration of...
