TMS320C80을 이용한 Template Matching Algorithm의 구현

趙敏亨 수원대학교 산업기술연구소 1998 산업기술연구소논문집 Vol.13 No.-

For an advanced manufacturing system the automations of the assembly and inspection of products are necessary and an image recognition system is required. In this paper, the high performance vision system using parallel digital signal processor, TMS320C80 is presented and the related S/W algorithm is described. In particular, the widely-used template matching algorithm which required a big computing power was newly developed and its optimal codes were implemented. The developed algorithm shows the high computation efficiency for TMS320C80. It has some advantages that the template size is unlimited and the accurate correlation can be obtained.

범용 DSP SSP1600을 이용한 MPEG Huffman decoder의 구현

趙敏亨 수원대학교 산업기술연구소 1992 산업기술연구소논문집 Vol.7 No.-

Many video compression and decompression systems require a high-speed implementation of variable-length (Huffman) coder and decoder. In this paper, MPEG Huffman decoder using a general purpose digital signal processor is implemented and its performance is analyzed. The method to use a general purpose DSP has some advantages. First, its programmability can support various algorithms such as JPEG, MPEG, and H. 261. Second, its development cost is low and the addition of extra logic for ASIC is easy. This paper analyzes the performance of SSP1600 for MPEG Huffman decoder and proposes the design of extra logic to improve its throughput.

국소성 피질이형성증의 외과적 치료

조관국,김형일,이민철,김근수,김연희,정창오,Neto, Pedro R. 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.12

Corticai Dysplasia(CD) is increasingly recognized as a cause of intractable epilepsy since it can be easily diagnosed with high resolution magnetic resonance imaging(MRI). We analyzed 24 consecutive cases with cortical dysplasia who underwent resective surgery at our institute between September. 1992 and December. 1995. MRI was demonstrated to be a decisive tool to identify CD in 16 cases(66.7%). However, the remaining 8 cases(93.9%) were confirmed to have CD based on histological examination. Location of the lesion included temporal(n=9), central(n=5), multilobar(n=5), and frontal(n=5). Intracranial EEG recording was performed to delineate the epileptogenic zons in 16 cases : subdural grid(10 cases) and depth electrode(6 cases). Resection was performed in temporal(n=9), frontal(n=7), central(n=5). parietal(n=1), and muitilobar(n=1). Complete resection was possible in 15(62.5%) and partial resection in 9(37.5%). Histological examination revealed dyslamination of cortical layers only(n=9), additional dysplastic neurons(n=7), and additional balloon cells(n=8). Surgical outcome was graded as seizure free(n=14 : 58.3%), rare seizures(n=3 : 12.5%). <50% reduction of seizure frequency(n=2 : 8%), and no change(n=5 : 20.8%) after mean follow-up of 12.7 months. The most influencing factor on the surgical outcome was the degree of completeness of resection(p<0.05). However. detectability of CD on MRI, severity of histological findings, age of seizure onset, and duration of seizure were not significantly related with the surgical outcome High suspicion is required to detect the CD among the patients with intractable epilepsy and surgical strategies should be well-planned to improve the surgical outcome in the patients with CD.

Ⅱ형 無水石膏를 利用한 高强度 콘크리트 PC Pile用 混和材 開發에 關한 硏究

조민형,남재현 大田大學校 産業技術硏究所 1997 산업기술연구소 論文集 Vol.8 No.1

The purpose of this study is to develope on alternative admixture for manufacture of PHC pile(compressive strength above 800㎏/㎠). For the investigation, alternative admixtures were made of Ⅱ-anhydrite and pozollanic fine powers(e.q., fly-ash, silica-fume), and the fluidity of the cement pastes and mortars added to these admixtures and compressive strength of hardened mortars at steam curing condition, were respectively examined. Also, base on the that study of cement pastes and mortars, properties of compressive strength of concretes with existing admixture(specimen name SM) and alternative admixture(specimen name MFS-1) for High-strength concrete precast pile, at steam and standard curing condition, were compared each other. As a result of this experimental study, it was found that specimens made on Ⅱ-anhydrite and pozollanic fine powers had an increase on the fluidity of cement pastes and mortars, and compressive strengths of mortar and concrete were as good as those with SM. Consequently, we could prove that a high strength concrete(with a compressive strength of 985㎏/㎠ at 28 days) for high-strength concrete precast pile was able to be made with such admixture.

3차원 콘빔CT 영상에서 형성한 2차원 정모두부방사선사진영상의 정확도 증진을 위한 두부자세재현기의 효과

선민규,엄기수,조진형,황현식 대한치과교정학회 2009 대한치과교정학회지 Vol.39 No.5

Objective: The purpose of the present study was to evaluate the effectiveness of the use of Head Posture Aligner (HPA) during cone-beam computed tomography (CBCT) scan in generation of frontal cephalograms using 3D CBCT images. Methods: CBCT scans and frontal cephalograms were made in 30 adult individuals. While a couple of CBCT scan was made for one subject, one was made with conventional method, without use of HPA, the other was acquired with the use of HPA. After creation of virtual frontal cephalogram from each 3D CBCT image, it was traced and compared with the tracing of real frontal cephalogram. Results: In the comparison of the measurements, the virtual cephalograms with the use of HPA did not show statistically significant differences with the real cephalograms whereas the virtual cephalograms without the use of HPA presented significant differences with real cephalograms in many measurements. In the correlation analysis with the measurements of the real cephalograms, the virtual cephalograms with the use of HPA showed higher correlations in all measurements than the virtual cephalograms without the use of HPA. Conclusions: Measurements from CBCT-generated cephalograms become similar to those from real cephalograms with the use of HPA during CBCT scan. Thus, the use of HPA is suggested during the CBCT scan in order to construct accurate virtual frontal cephalograms using 3D CBCT images. 본 연구는 3차원 콘빔CT 영상을 이용하여 2차원 정모두부방사선사진영상 형성 시 두부자세재현기(Head Posture Aligner, HPA)를 이용한 경우와 이용하지 않은 경우를 비교분석함으로써 HPA의 유용성을 평가하기 위하여 시행되었다. 성인 30명을 대상으로 먼저 일반적인 방법으로 콘빔CT 영상을 채득한 후 HPA를 이용하여 일정한 두부자세를 재현한 상태에서 또 하나의 콘빔CT 영상 및 정모두부방사선사진을 촬영하였다. 3차원 영상프로그램을 이용하여 HPA를 이용하지 않은 경우와 HPA를 이용한 경우 각각에서 2차원 정모두부방사선사진영상을 형성한 다음 각각의 투사도를 작성하고 실제로 HPA를 이용하여 촬영된 정모두부방사선사진 투사도와의 차이를 비교하였다. 거리 및 각도를 나타내는 여러 계측치를 비교분석한 결과 HPA를 이용하지 않은 경우에는 다수의 계측항목에서 실제 정모두부방사선사진과 유의한 차이를 보인 반면 HPA를 이용한 경우에는 모든 항목에서 통계적 유의차를 보이지 않았다. 아울러 실제 정모두부방사선사진과의 상관관계를 알아보기 위해 상관분석을 시행한 결과 HPA를 이용한 경우가 그렇지 않은 경우보다 모든 항목에서 높은 상관성을 보였다. 본 연구 결과는 3차원 콘빔CT 영상을 이용하여 2차원 정모두부방사선사진영상 형성 시 정확한 영상 획득을 위해서는 콘빔CT 촬영 시 HPA의 사용이 필요함을 시사하였다.

스캔 설계 법칙 검사에 관한 연구

이재훈,김형국,조경연,임동욱,민형복 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.2

Since testing of digital circuit is becoming increasingly important, many methodologies have been introduced to enhance design for testability (DFT). DFT was taken into account in the automated test procedure and improved reliability of the design. Both tasks are well suited for scan rule checker. This paper presents a scan rule checker for gate level digital circuits. The scan rule checker deals with basic rule check, basic scan rule check, muxed scan rule check, clocked scan rule check and lssd. Scan design informations were represented in the configuration file and libraries were modeled for the scan rule checker. It is an efficient way for the design for testability methodology.

산재지정병원 이용 후 산재요양환자에 대한 만족도 조사

이화평,임형준,주영수,권영준,강희태,김정민,조성식,이태경,윤종완 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.3

토끼에서 enrofloxacin과 enrofloxacin acetate의 比較藥物動態學

윤효인,박승춘,김창식,김민규,최기섭,신광순,박종일,조준형,조명행 충남대학교 수의과대학 동물의과학연구소 1996 動物醫科學硏究誌 Vol.4 No.-

This study was designed to examine the in vitro antibacterial activities and pharmacokinetics of enrofloxacin acetate (ENFXA) and enrofloxacin (ENFX). Two enrofloxacins had wide spectrum antibacterial activities against Gram positive and negative bacteria, and mycoplasma, showing potent antibacterial activities with low MICs (0.05-3.33 ㎍/㎖ for Gram positives, 0.002 ㎍/㎖ for Gram negatives and 0.02 ㎍/㎖ for mycoplasma). In order to investigate the profiles of two formulations of enrofloxacin we studied comparative pharmacokinetics of them in rabbits. Five rabbits were given 5 ㎎/㎏ body weight of each enrofloxacin formulation intravenously (i.v.) and orally (p.o.) in a cross-over study. Pharmacokinetic parameters of both formulations were calculated by the use of PCNONLIN, a computer program. Their bioavailibility in rabbits, the means of the area under the curve (AUC). After oral administration of each formulation in rabbits, the mean elimination half-lives (t_1/2,ke) were 3.25h (ENFX) and 4.32 h (ENFXA), and mean AUC 4.27 ㎍·h/㎖ (ENFX) and 6.21 ㎍·h/㎖ (ENFXA). Both enrofloxacin formulations seemed to have good tissue distribution and penetration as indicated by large volume of distribution: 4.76 1/㎏ for ENFX and 7.23 1/㎏ for ENFXA. With the results obtained in this study, ENFXA could be used in place of ENFX in rabbits.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

실험적 급성 허혈성 신부전에서 칼슘 길항제의 투여가 신기능과 뇨 Prostaglandin E2 의 배설에 미치는 영향

조원용(Won Yong Cho),권현민(Hyoun Min Kwon),변현주(Hyoun Ju Byoun),구자룡(Ja Ryong Gu),이규백(Kyu Back Lee),김형규(Hyoung Kyu Kim),노정우(Jung Woo Noh) 대한내과학회 1991 대한내과학회지 Vol.40 No.5

N/A It has been proposed that calcium entry from the external medium increases intracellular free calcium to toxic levels during ischemic acute renal failure (ARF) thereby converting cellular injury from a potentially reversible to an irreversible state. Because verapamil impedes calcium entrance into cells via voltage-dependednt slow calcium channels, it has been suggested that this agent may block calcium entry into the kidney cells. This study was designed to determine whether systemic verapamil pretreatment protects renal function in experimental ischemic ARF in cats and whether verapamil influences prostaglandin, a compensatory system for an acute insult of kidney. For these purpose, creatinine clearance and urinary PGE2 were measured in 18 cats before and after ischemia. The experimental animals were divided into 3 groups. Group I (n=6) was ischemic ARF model by renal artery clamping for 60 minutes. Group II (n=5) was ischemic ARF with systemic verapamil pretreatment (5 μg/kg/min), and Group III (n=7) was the same as Group II with nonsteroidal antiinflammatory drug pretreatment (20 μg/kg/min). The results were as follows: 1) In Group I, creatinine clearance was 10.79±7.19 before clamping and decreased to 2.09±1.70ml/min/ kg, in Group II, 3.41±1.56 to 0.12±0.05ml/min/kg; and in Group III, 6.30±5.50 to 0.80±0.70ml/min/kg. 2) Creatinine clearance decreased significantly in Group II (96±2%) compared with Group I (61±30%). 3) Urine PGE2 in the preischemic period of Group I was 346±175, Group II; 159±102, Group III; 137±91 ng/ ml increased to Group I 355±114, Group II; 471±346, Group III; 355±114 ng/ml in postischemic period. Urine PGE2 excretion was relatively low in Group II and Group III, compared with Group I but not significant statistically. From these findings, it was suggested that systemic verapamil pretreatment exerts no protective effect to ischemic ARF and that it may compromise the compensatory mechanism of the prostaglandin system in ischemic ARF.