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송근호,김강철,한석붕,Song, Geun-Ho,Kim, Gang-Cheol,Han, Seok-Bung 대한전자공학회 2001 電子工學會論文誌-SD (Semiconductor and devices) Vol.38 No.1
본 논문에서는 아날로그 회로에 존재하는 강고장(hard fault)과 약고장(soft fault)을 검출하기 위한 새로운 테스트 방식을 제안한다. 제안한 테스트 방식은 연산 증폭기의 특성중 하나인 오프셋 전압(offset voltage)을 이용한다. 테스트 시, 테스트 대상 회로(CUT: Circuit Under Test)는 귀환 루프를 가지는 단일 이득 연산 증폭기로 변환된다. 연산 증폭기의 입력이 접지되었을 때, 정상 회로는 작은 오프셋 전압을 가지지만 고장이 존재하는 회로는 큰 오프셋 전압을 가진다. 따라서 오프셋 전압의 허용 오차를 벗어나는 연산증폭기 내에 존재하는 고장들을 검출할 수 있다. 제안한 테스트 방식은 테스트 패턴 없이 단지 입력을 접지시키면 되므로 테스트 패턴을 생성하는 문제를 제거시킬 수 있어 테스트 시간과 비용이 감소한다. HSPICE 모의 실험을 통하여 본 논문에서 제안하는 방식을 단일 연산증폭기와 듀얼 슬롭(dual slope) A/D 변환기에 적용한 결과 높은 고장 검출율(fault coverage)을 얻었다. In this paper, a novel test method is proposed to detect the hard and soft fault in analog circuits. The proposed test method makes use of the offset voltage, which is one of the op-amps characteristics. During the test mode, CUT is modified to unit gain op-amps with feedback loop. When the input of the op-amp is grounded, a good circuit has a small offset voltage, but a faulty circuit has a large offset voltage. Faults in the op-amp which cause the offset voltage exceeding predefined range of tolerance can be detected. In the proposed method, no test vector is required to be applied. Therefore the test vector generation problem is eliminated and the test time and cost is reduced. In this note, the validity of the proposed test method has been verified through the example of the dual slope A/D converter. The HSPICE simulations results affirm that the presented method assures a high fault coverage.
송근호,이현옥,Song, Geun-Ho,Lee, Hyun-Ok 대한물리치료학회 2006 대한물리치료학회지 Vol.18 No.4
Purpose: This study was to investigate the effect of an arm sling on gait with hemiparesis. Methods: Fifteen patients(8 male, 7 female) with hemiparesis participated in this study and walked self-selected speed over 10m walkway, randomly without arm sling, with Single strap hemisling and Rolyan humeral cuff sling. It were filmed by 5 video camera and used with 3-dimensional motion analyzer system. The following gait variables were analyzed: temporo-spatial parameters, kinematic parameters. Results: In the comparison of temporo-spatial parameters each trial, walking velocity and single support time on affected side was significantly increased and step length on affected side, step length asymmetry ratio, single support time asymmetry ratio was significantly decreased in the Single strap hemisling and Rolyan humeral cuff sling. In the comparison of kinematic parameters each trial, maximal angle of the hip flexion on affected side was significantly increased in the Single strap hemisling and Rolyan humeral cuff sling and maximal angle of the knee flexion on affected side was significantly increased in the Rolyan humeral cuff sling and maximal angle of the ankle dorsiflexion on affected side was significantly increased in the Single strap hemisling. Conclusion: An arm sling improved walking velocity and decreased asymmetry and increased maximal angle of hip, knee, ankle flexion on affected side with hemiparesis caused by stroke.
분리기술,열역학 : 친수성으로 표면개질한 폴리설폰막의 투과플럭스
송근호 ( Song Geun Ho ),김강희 ( Kim Gang Hui ),조성헌 ( Jo Seong Heon ),이광래 ( Lee Gwang Lae ),임종호 ( Im Jong Ho ),배성수 ( Bae Seong Su ) 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.1
A hollow-fiber type polysulfone UF membrane was surface-coated with 2-hydroxyethylmethacrylate(HEMA). The effect of various coating paramters on permeation flux was investigated, such as concentration ratio of Azobisisobutyronitrile(AIBN)/HEMA, solvent (water or methanol), and UV irradiation time. The membrane coated with a solution of AIBN/HEMA/methanol showed about 2.65 times higher water flux than that coated with a solution of AIBN/HEMA/water. The membrane coated with a solution of higher AIBN/HEMA ratio and a longer UV irradiation time exhibited a higher permeation flux. The membrane coated with a solution of lower AIBN/HEMA ratio needed a longer UV irradiation time for coating to get a same level of permeation flux. In order to have a greater permeation flux than uncoated membrane, the membrane should be coated with a solution of a certain AIBN/HEMA ratio and UV irradiation time. The fouling by oil emulsion occurred to both of the coated and the uncoated membrane. However, the fouling of coated membrane was much less than uncoated one; the water flux(0.2683g/㎠·min)through the coated membrane was about 6 times higher than that(0.0558g/㎠·min) through the uncoated membrane.
EDGE AI 기반의 멀티플렉싱을 활용한 다중 카메라 스트림 골격 추정 시스템
송근호(Geun-Ho Song),이주영(Ju-Young Lee),양종섭(Jong-Seop Yang),정회경(Hoe-Kyung Jung) 한국콘텐츠학회 2023 한국콘텐츠학회논문지 Vol.23 No.12
Image multiplexing is a technique for creating one image from multiple images acquired from multiple cameras. In this paper, we implemented a system that infers skeletal poses from multiple images simultaneously using a single GPU model by downsizing and multiplexing multiple images. In order to process four or more images simultaneously without difficulty, the images were downsized horizontally and vertically by 1/2, then multiplexed to create one image, and the skeleton was inferred using the Yolov8-pose model. During the experiment, the result was about 1/4 of the total time required for inference for 4 images, and skeletal inference performance was also confirmed to have similar performance to single image inference. Accordingly, this paper provides an effective solution with a minimum number of computing devices and a fast runtime for areas that require not only skeletal inference but also parallel processing of images collected from multiple cameras.
조진행,김영찬,송근호,김덕환,Jo Jin Haeng,Kim Yeong Chan,Song Geun Ho,Kim Deok Hwan 대한수의사회 2003 대한수의사회지 Vol.39 No.11
We analyzed the records that distribution of the twinning rate, sex of calves and complications of other diseases with twin pregnancy from 10,012 dairy cows for 5-year period from 70 dairy farms in Paju and Goyang cities. Twining rate was increased for 5-
신상은(Sang-Eun Shin),강호석(Ho-Seok Kang),양종섭(Jong-Seop Yang),송근호(Geun-Ho Song),정회경(Hoe-Kyung Jung) 한국콘텐츠학회 2023 한국콘텐츠학회논문지 Vol.23 No.12
In this paper, we developed a store management system that detects the display status of products in real time and manages them to comply with the plan-o-gram using real-time product recognition and display status estimation technology based on deep learning. To achieve this, we input store shelf images, localize each product using the YOLOv8 deep learning model trained with the SKU110K data set, and generate an image feature vector using an em-bedder that fine-tunes the ResNet-50 model, combining the pre-registered reference image feature vector and Compare and identify and classify products. The plan-o-gram compliance control algorithm has been supplemented so that the plan-o-gram compliance status generated through sequence alignment of the modified Needleman-Wunsch(NW) algorithm can be utilized in actual store situations. Previously, there were many errors by judging the four states: exact match(MT), missing item(MI), added item in the correct position(ME), and added or misplaced item or empty space(NM). Accordingly, in this paper, we subdivide NM into 5 states (addition, deletion, location change, remote placement, and position shift), expand it to a total of 8 states, and present an algorithm that can handle various characteristic cases.
불안정한 지지면에서의 율동적 감각-운동훈련이 여성노인의 균형능력에 미치는 영향
이한기 ( Han Ki Lee ),이준철 ( Jun Cheol Lee ),송근호 ( Geun Ho Song ) 대한물리의학회 2014 대한물리의학회지 Vol.9 No.2
PURPOSE: The purpose of this study was to investigate the effect of sensorimotor training in unstable surface on balance ability of elderly women. METHODS: Total of 40 subject were recruited from two separated institution for elderly women in Changwon and conveniently allocated into experimental and control groups. Twenty women were included into experimental group and another twenty women were into control group. Experimental group performed sensorimotor training in unstable surface and control group were only activities of daily living during eight weeks. To assess static balance ability used One leg stance test (OLST) and to assess dynamic balance ability used timed up and go test (TUGT) and Functional reach test (FRT). RESULTS: Control group did not show any difference in balance ability. However static balance ability in experimental group improved on hard or soft surface only eye open condition. Also dynamic balance ability in experimental group improved TUGT or FRT. CONCLUSION: Sensorimotor training in unstable surface improved balance ability of elderly women.
개선된 다출력 동적 CMOS 설계 방식을 이용한 고성능 32 비트 CLA가산기 설계 및 구현
송근호,방만식,서정훈,한석붕,이효상,김강철 慶尙大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.13 No.-
In this paper, we designed, implemented and evaluated 32-bit CLA adder with the ENMODL(enhanced NORA Multiple Output Domino Logic) logic style which is new dynamic CMOS logic. The circuit is implemented using 0.8㎛ CMOS double-metal process technology. It operates stably and the addition time is less 3.9 ns. The ENMODL logic style can improve the performance in the high-speed computing circuits depending on the degree of recurrence.