• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.780-783
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• 2003

In this study, As The Tae Yang Metal company manufactured oil tank inserts welding structure bogie, it is Contributed in stability security of freight car of oil tank through static load test, dynamic characteristics analysis. vibration performance test etc. to verify intensity of bogie frame ＆ body structure

• 한국자동차공학회논문집
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• 제16권4호
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• pp.179-185
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• 2008

The purpose of this paper is to propose a systematic method on the weld pitch design of a vehicle sub-frame considering the fatigue life of spot welding points. The input data, which perform the fatigue analysis on the spot welding nuggets, are obtained by both the dynamic analysis of the multi-body vehicle model passing through the virtual proving ground of a typical Belgian road and the quasi-static analysis with the finite element model of the vehicle sub-frame. By utilizing the life cycle data obtained from the fatigue analysis, the welding points to perform the pitch change are determined. The sensitivity analysis on the fatigue life of the welding points is carried out by using the three-level orthogonal array design, and through the results of the sensitivity analysis, the best combination on the welding pitch is determined. This study shows that as compared with the baseline design, the sub-frame redesigned by the proposed technique improves the fatigue life about 7 percent while reducing the number of welding points about 19 percent.

• 한국정보통신학회논문지
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• 제5권7호
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• pp.1280-1286
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• 2001

본 연구에서는 작업자의 일정한 동작을 보다 효율적으로 인식할 수 있는 시스템을 제안하고자 한다. 먼저, 작업자의 동작을 촬영한 동영상에서 연속된 프레임간의 차를 기반으로, 고정된 배경과 움직이는 대상을 분리한다. 다음으로, 에지 검출을 이용하여 동작의 중심 위치를 추정하여 연속적으로 움직이는 동작을 인식할 수 있도록 하였다. 본 연구에서 설계한 동작 인식시스템은 기존의 산업헌장에서 적용되고 있는 동작인식 시스템의 문제점을 보완하기 위하여 작업자의 동작을 고정된 CCTV로 촬영한 영상을 인식의 대상으로 취함으로써 동작 정보를 얻기 위한 각종 장비들이 최소화되었다. 또한, 작업자의 신체 부분별 특성을 추출하기 위한 계산 작업에 소요되는 시간을 줄이기 위하여 프레임간의 차연산과 에지검출을 통한 동작인식을 실시하여 인식에 필요한 작업시간을 단축하여, 효율적이면서 비용이 저렴한 동작 인식시스템을 설계하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제24권11호
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• pp.1587-1594
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• 2011

Live weight, body length, hip and shoulder heights, heart girth, and metatarsal length were measured on 100 one to two years old Bali (Bos javanicus) bulls. Multiple regression of these measurements on live weight gave a prediction equation involving heart girth and body length (prediction $R^2$ = 0.845). These measurements were also used to derive several frame scores (FS). Live weight (Lwt) divided by FS was used as an index of body condition. Lwt/(length+hip height) was normally distributed and highly correlated with other normally-distributed condition indexes. This index was used to define five body condition scores. These were used to develop a five-point body condition scoring system in which the amount of fleshing over the vertebral processes, ribs, hindquarters, tail head, hooks, at the top of the neck, and the shoulders, the development of wrinkles in the skin above the hock and the neck, and the size of the dewlap, were used to describe the different body condition scores. Animals of score 1 had prominent hooks, shoulders, vertebrae and ribs, and hollow hindquarters and flat tailhead. Score 5 animals had rounded hindquarters, well-filled upper hind legs, small mounds of soft tissue were apparent on the tailhead, their hooks, necks, shoulders, vertebrae and ribs were well covered, and the dewlap was prominent.

• Asian-Australasian Journal of Animal Sciences
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• 제28권1호
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• pp.69-78
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• 2015

A non-traditional forage-based protocol was employed to evaluate replacement heifer growth, fertility, and economics between small frame (SF, 3.50; n = 50) and large frame (LF, 5.56; n = 50) heifers using three increasing gain growth phases. Preceding an 85 d growing-breeding period (Phase 3; P3) the heifers were managed as a common group for Phases 1 and 2 (P1 and P2). During P1, heifers grazed common fields of unharvested corn and corn residue (total digestible nutrients [TDN] 56%) with supplemental hay. For P2, heifers grazed early spring crested wheatgrass pasture (CWG; TDN 62%) that was followed by the final P3 drylot growing and breeding period (TDN 68%). Small frame heifers were lighter at the end of P1 in May and at the start of P3 breeding in August (p = 0.0002). Percent of mature body weight (BW) at the end of P1 (209 d) was 48.7% and 46.8%, respectively, for the SF and LF heifers and the percent pubertal was lower for SF than for LF heifers (18.0% vs 40.0%; p = 0.02). At breeding initiation (P3), the percentage of mature BW was 57.8 and 57.2 and the percentage pubertal was 90.0 and 96.0 (p = 0.07) for the SF and LF heifers, respectively; a 5-fold increase for SF heifers. Breeding cycle pregnancy on days 21, 42, and 63, and total percent pregnant did not differ (p>0.10). In drylot, SF heifer dry matter intake (DMI) was 20.1% less (p = 0.001) and feed cost/d was 20.3% lower (p = 0.001), but feed cost/kg of gain did not differ between SF and LF heifers (p = 0.41). Economically important live animal measurements for muscling were measured in May and at the end of the study in October. SF heifers had greater L. dorsi muscle area per unit of BW than LF heifers (p = 0.03). Small frame heifer value was lower at weaning (p = 0.005) and the non-pregnant ending heifer value was lower for SF heifers than for the LF heifers (p = 0.005). However, the total development cost was lower for SF heifers (p = 0.001) and the net cost per pregnant heifer, after accounting for the sale of non-pregnant heifers, was lower for SF heifers (p = 0.004). These data suggest that high breeding efficiency can be attained among March-April born SF and LF virgin heifers when transitioned to a more favorable May-June calving period through the strategic use of grazed and harvested forages resulting in a lower net cost per pregnant SF heifer.

• 한국실내디자인학회논문집
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• 제4호
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• pp.5-9
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• 1995

In this study, the relationships between the interior space of the upper class residence of Korean late Chosun dynasty and human dimensions based on their life styles of that era are analized. As an object of the study, the interior space of Yunkyungdant in Changduk palace is selected. The major analytical frame works of this study are : the analysis of Space-Human Body System, the analysis of Space-Objects-Human Body System, and the analy-sis of Space-Objects-Human Body System, and the analy-sis of Space-Objects-Life Activities of Human Body System. As a result, it was verified that there are certain quantitative relationships between the interior space of the residence and the human dimensions of Koreans lived up to their life styles and activities of Chosun dynasty era, specialized as 'Confucian life style'.

• 한국멀티미디어학회논문지
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• 제14권8호
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• pp.992-999
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• 2011

This paper proposed a human body posture recognition program based on haar-like feature and hand activity detection. Its distinguishing features are the combination of face detection and motion detection. Firstly, the program uses the haar-like feature face detection to receive the location of human face. The haar-like feature is provided with the advantages of speed. It means the less amount of calculation the haar-like feature can exclude a large number of interference, and it can discriminate human face more accurately, and achieve the face position. Then the program uses the frame subtraction to achieve the position of human body motion. This method is provided with good performance of the motion detection. Afterwards, the program recognises the human body motion by calculating the relationship of the face position with the position of human body motion contour. By the test, we know that the recognition rate of this algorithm is more than 92%. The results show that, this algorithm can achieve the result quickly, and guarantee the exactitude of the result.

• 한국자동차공학회논문집
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• 제18권2호
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• pp.141-146
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• 2010

This paper describes the static and dynamic characteristics of body mount system which are to be considered in the early design stage. At every location of body mount the static load and dynamic response to road input were calculated using the half car model. Normal mode analysis for the half car model was also performed. In the analysis the design parameters such as the stiffness of mount rubbers and their distribution on mount location were examined for improving ride comfort especially in the lower frequency range.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권2호
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• pp.1118-1133
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• 2017

Computer vision-based human activity recognition (HAR) has become very famous these days due to its applications in various fields such as smart home healthcare for elderly people. A video-based activity recognition system basically has many goals such as to react based on people's behavior that allows the systems to proactively assist them with their tasks. A novel approach is proposed in this work for depth video based human activity recognition using joint-based motion features of depth body shapes and Deep Belief Network (DBN). From depth video, different body parts of human activities are segmented first by means of a trained random forest. The motion features representing the magnitude and direction of each joint in next frame are extracted. Finally, the features are applied for training a DBN to be used for recognition later. The proposed HAR approach showed superior performance over conventional approaches on private and public datasets, indicating a prominent approach for practical applications in smartly controlled environments.

• 한국자동차공학회논문집
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• 제5권6호
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• pp.28-35
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• 1997

Occupant injuries are always possible in a rollover accident, one of the major accidents in a bus. Thus the structure of body frame should have sufficient strength to protect passengers under accidental loads,. ECE(Economic Commission for Europe) regulation No.66 prescribes that residual space shall be preserved in the passenger compartment during and after the structure has been subjected to the prescribed rollover test. Rollover test on a bus section was completed according to the regulation. The coordinates of body section before and after rollover were measured, and it was checked that the structure still complied with the requirements of residual space. Direct measurement on a bus is difficult because of its large size. Thus photogrammetry by photographing and 3 dimensional digital modeling was introduced, and the coordinates of each point were measured through this method.