• Journal of the Semiconductor & Display Technology
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• v.23 no.2
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• pp.76-81
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• 2024

UC Berkeley developed RISC-V, which is an open-source Instruction Set Architecture. This paper proposes a 32-bit 6-stage pipeline architecture based on the RV32I RSIC-V. The performance of the proposed 6-stage pipeline architecture is compared with the existing 32-bit 5-stage pipeline architecture also based on the RV32I processor ISA to determine the impact of the number of pipeline stages on performance. The RISC-V processor is designed in Verilog-HDL and implemented using Quartus Prime 20.1. To compare performance the Dhrystone benchmark is used. Subsequently, peripherals such as GPIO, TIMER, and UART are connected to verify operation through an FPGA. The maximum clock frequency for the 5-stage pipeline processor is 42.02 MHz, while for the 6-stage pipeline processor, it was 49.9MHz, representing an 18.75% increase.

• Clinical and Experimental Pediatrics
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• v.53 no.3
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• pp.373-379
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• 2010

Purpose : This study was performed to investigate the epidemiologic and clinical features of 13 respiratory viruses in children with acute lower respiratory tract infections (ALRIs). Methods : Nasopharyngeal aspirates were prospectively obtained from 325 children aged 15 years or less from May 2008 to April 2009 and were tested for the presence of 13 respiratory viruses by multiplex real-time-polymerase chain reaction (RT-PCR). Results : Viruses were identified in 270 children (83.1%). Co-infections with ${\geq}2$ viruses were observed in 71 patients (26.3 %). Respiratory syncytial virus (RSV) was the most common virus detected (33.2%), followed by human rhinovirus (hRV) (19.1%), influenza virus (Flu A) (16.9%), human metapneumovirus (hMPV) (15.4%), parainfluenza viruses (PIVs) (8.3%), human bocavirus (hBoV) (8.0%), adenovirus (ADV) (5.8%), and human coronavirus (hCoV) (2.2%). Clinical diagnoses of viral ALRIs were bronchiolitis (37.5%), pneumonia (34.5%), asthma exacerbation (20.9%), and croup (7.1%). Clinical diagnoses of viral bronchiolitis and pneumonia were frequently demonstrated in patients who tested positive for RSV, hRV, hMPV, or Flu A. Flu A and hRV were most commonly identified in children older than 3 years and were the 2 leading causes of asthma exacerbation. hRV C was detected in 14 (4.3%) children, who were significantly older than those infected with hRV A ($mean{\pm}SD$, $4.1{\pm}3.5$ years vs. $1.7{\pm}2.3$ years; P =0.009). hBoV was usually detected in young children ($2.3{\pm}3.4$ years) with bronchiolitis and pneumonia. Conclusion : This study described the features of ALRI associated with 13 respiratory viruses in Korean children. Additional investigations are required to define the roles of newly identified viruses in children with ALRIs.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.171_172
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• 2009

본 논문에서는 EMTP-RV를 이용하여 초전도 케이블과 보호기기를 모델링 하였고, 고장 발생 시 케이블에 발생하는 ��치 현상을 분석하였다. 그리고 계통 적용 시 초전도 케이블을 모선으로 사용하고 보호협조를 분석하였다.

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.157-159
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• 2008

This paper describes modeling and analysis of magnetic inrush for a 765kV transformer using EMTP-RV. EMTP-RV generates the core flux and thus helps show the behavior of the core, i.e. hysteresis characteristics. The results of three kinds of the magnetic inrush such as initial inrush, sympathetic inrush, and recovery inrush are included. This modelling can help the design of a protection relay for a transformer.

• Journal of Chest Surgery
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• v.17 no.4
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• pp.632-635
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• 1984

Hypoplastic RV was rarely combined with various other intracardiac anomalies. We experienced the excellent result after surgical correction in these 2 patients. 1. F/7: Combined anomalies were, [1] Hypoplastic Rt. Coronary art.[2] Hypoplastic RV [3] ASD [secundum] & [4] PS [infundibular & valvular] After CP Bypass, [1] Direct suture of ASD [2] Infundibulectomy [3] Pul valvulotomy & [4] Patch enlargement of RVOT with Pericardial monocusp were done 2. F/14: Combined anomalies were, [1] Hypoplastic RV [2] P5 [infundibular] [3] T5 [4] VSD [Type II] [5] ASD [secundum] & [6] 2\ulcornerA-V Block fter CP Bypass, [1] Infundibulectomy [2] Tricuspid valvulotomy [3] Patch repair of VSD & ASD & [4] Implantation of permanent pacemaker were done. Above operations resulted in marked improvement with disappearance of cyanosis & dyspnea.

• Journal of Chest Surgery
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• v.20 no.4
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• pp.765-772
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• 1987

Double-chambered right ventricle [DCRV] as a clinical and anatomic entity was separated from other forms of right ventricle obstruction, and frequently associated with VSD. We experienced surgical treatment of 6 cases of DCRV with VSD. Among them, PDA in a case, PFO in two cases and one case of mild infundibular PS were associated. Preoperative cardiac catheterizations and RV cineangiograms showed about 69 mmHg. of pressure gradient in average between RV inflow and outflow portion, and filling defect by anomalous muscle bundles in the sinus portion of RV. On operation, VSD and other associated anomaly were corrected after resection of anomalous muscle bundle for relief of the obstruction through the vertical RV-tomy site. Postoperative EKG showed complete RBBB, but hemodynamic problems were not developed. Postoperative cardiac catheterizations showed markedly decreased pressure gradient between two chambers, that was about 15 mmHg. in average. Postoperative course was smooth and discharged without any problems.

• The Korean Journal of Physiology and Pharmacology
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• v.6 no.2
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• pp.121-125
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• 2002

The pathophysiological implications of aldosterone and adrenomedullin in the cardiac ventricular hypertrophy were examined. Male Sprague-Dawley rats were treated with deoxycorticosterone acetate (DOCA)-salt and monocrotaline (MCT) to selectively elicit left and right ventricular (LV, RV) hypertrophy, respectively. The mRNA expression of aldosterone synthase and adrenomedullin in LV and RV was determined by reverse transcription-polymerase chain reaction. The expression of aldosterone synthase and adrenomedullin was increased in LV, while not altered significantly in RV of DOCA-salt-treated rats. On the contrary, the expression was not significantly altered in LV, but increased in RV of MCT-treated rats. The enhanced expression of aldosterone synthase may be causally related with the development of ventricular hypertrophy, and the increased expression of adrenomedullin may act as a counter-regulatory mechanism.

• Korean Journal of Animal Reproduction
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• v.26 no.4
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• pp.369-375
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• 2002

A sperm factor(s) for oocyte activation during fertilization has not been clearly identified. In this study to elucidate an oocyte activation factor(s), mouse sperm were sonicated and ultra-filtered with a 30 kilo-daltons (KD) cutoff membrane and the ultra-filtrate was then sequentially fractionated over Suporose 12 column and Superdex column, The recovered fractions were micro-injected into Mⅱmouse oocytes and second polar body formation (PBF) was examined. Suporose fraction RV2.10 prepared from sperm extract significantly increased PBF. Of Superdex fractions re-separated from Suporose fraction RV2.10, fraction RV2.12 also had the strongest PBF activity. By analyzing with micro-reverse phase column (URPC), the Superdex fraction RV2.12 appeared to be glutamic acid. In microinjection test, glutamic acid significantly increased PBF. This study suggests that glutamic acid should be a type of sperm factor for second polar body formation related to oocyte activation.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.17 no.3
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• pp.71-77
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• 2008

This paper presents a stereo vision based autonomous inspection system for welding quality control of a RV(Recreational Vehicle) sinking seat. The three dimensional geometry of the welding bead, which is the welding quality criteria, is measured by using the captured stereo images with a median filter applied on it. The image processing software for the system was developed using the NI LabVTEW software with NI vision system. In the manufacturing process of a RV sinking seat, the developed system can be used for overcoming the precision error that arises from a visible inspection by an operator. The welding quality inspection system for RV sinking seat was verified using experimentation.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.10
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• pp.42-48
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• 2010

The Microsource has to supply high quality Power that has high reliability and high energy efficiency to Load according to operating type of Microgrid. The energy sources of microsource type have various dynamic characteristic and transient response corresponding to classes and application skill. This paper shows dynamic characteristic of Microgrid according to Energy Source of microsource type. This research has been carried out by detailed modelling of Microturbine system and Fuelcell system. All models are realized by EMTP/RV and simulated change of operating type and load increase within Microgrid of DC constant voltage inverter model and Microturbine, Fuelcell based Microsource.