• 대한치과교정학회지
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• 제36권5호
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• pp.380-387
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• 2006

본 연구는 이부편위자의 정모두부방사선사진에서 하악골상행지 경사도의 좌우 차이를 알아봄으로써 교정환자의 임상검사 시 비대칭 진단에 도움이 되고자 시행되었다. 뚜렷한 이부편위를 보이는 성인 30명을 이부편위군으로, 좌우 대칭적인 외모를 보이는 성인 30명을 대조군으로 선정하여 정모두부방사선사진을 촬영한 후 하악골상행지 경사도를 측정하고 좌우 차이를 산출, 비교 분석한 결과, 대조군의 경우 좌우 차이를 보이지 않은 반면 이부편위자에서는 하악골상행지 경사도의 좌우 차이를 보였다. 이부편위자에서 비편위측의 하악골상행지의 경사도는 편위측에 비해 통계적으로 유의하게 큰 것으로 나타났으며, 하악골상행지 경사도의 좌우차이는 이부편위 정도 및 상악고경의 좌우차이와 통계적으로 유의한 순상관관계를 보였다. 이부편위자에서 하악골상행지 경사도의 좌우차이를 규명한 본 연구 결과는 안면비대칭 환자의 진단 시 하악골상행지 경사도에 대한 분석이 필요함을 시사하였다.

• 한국자동차공학회논문집
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• 제22권1호
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• pp.65-70
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• 2014

An Integrated Dynamics Control system with four wheel Steering (IDCS) is proposed and analysed in this study. It integrates and controls steer angle of front and rear wheel simultaneously to enhance lateral stability and steerability. An active front steer (AFS) system and an active rear steer (ARS) system are also developed to compare their performances. The systems are evaluated during brake maneuver and several road conditions are used to test the performances. The results showed that IDCS vehicle follows the reference yaw rate and reduces side slip angle very well. AFS and ARS vehicles track the reference yaw rate but they can not reduce side slip angle. On split-${\mu}$ road, IDCS controller forces the vehicle to go straight ahead but AFS and ARS vehicles show lateral deviation from centerline.

• 한국공작기계학회논문집
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• 제17권2호
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• pp.90-96
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• 2008

A pneumatic system was proposed to evaluate displacement accuracy of the pneumatic actuator without external load and to analyze capability of integration of the proposed valve system. The proposed pneumatic system consisted of a combination of pneumatic valves, two proximity sensors, and a programmable logic controller(PLC). The position controller is based on the PLC controller connected with the proximity sensors. Displacement accuracy of the pneumatic cylinder stroke was tested by varying air pressures of the supply and discharge-side and strokes of the pneumatic cylinder. The displacement accuracy of the pneumatic cylinder stroke increased as the supply and discharge side of air pressure increased at the stroke length of 133mm. Also the displacement accuracy increased as the stroke length increased with a fixed supply and discharge side of air pressure of the pneumatic cylinder as 3.5 and $4.5kg/cm^2$, respectively. The most accurate displacement of the pneumatic cylinder(i.e., standard deviation of 0.01 mm) was obtained at the supply and discharge side of air pressure of 4.0 and $5.0kg/cm^2$, respectively, and strokes of 170 and 190 mm among arbitrarily selected supply and discharge side air pressures and strokes.

• 대한물리치료과학회지
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• 제15권3호
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• pp.43-54
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• 2008

Background : We aimed to determine the effect of a mental practice on the electromyography (EMG) activity of the quadriceps femoris muscle of the affected side in a hemiplegic patient during sit-to-stand and stand-to-sit tasks. Methods : We recruited a male patient who had suffered from right hemiplegia. A single-subject experimental A-B-A design was used. The reliability of visual analysis, which was primarily employed in this study design, was supported by using the "2- standard-deviation band" method. The target motions consisted of two activities: sit-to-stand and stand-to-sit. The EMG measurements of the quadriceps femoris muscles of the affected and unaffected sides were made in 8 sessions in the baseline (A), mental-practice (B), and follow-up (A) phases. During the mental practice phase, the 10-min mental practice was performed, and the mental practice was withdrawn in the follow-up phase in order to identify the carry-over effects of the treatment. Data was calculated as the percentage of the ratio of the quadriceps EMG activity values of the affected side on unaffected side. Result : The percentage EMG-activity ratio showed a greater increase in the mental-practice phase than in the baseline, and it was maintained during the follow-up phase. Most of the data points in the mental-practice and follow-up phases were positioned above the "2-standard-deviation band." Conclusion : These findings suggest that mental practice can be used to improve the physical function of hemiplegic patients.

• 대한치과교정학회지
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• 제49권4호
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• pp.254-264
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• 2019

Objective: To evaluate the short-term changes in masticatory muscle activity and mandibular movement patterns after orthognathic surgery in skeletal Class III patients with facial asymmetry. Methods: Twenty-seven skeletal Class III adult patients were divided into two groups based on the degree of facial asymmetry: the experimental group (n = 17 [11 male and 6 female]; menton deviation ${\geq}4mm$) and control group (n = 10 [4 male and 6 female]; menton deviation < 1.6 mm). Cephalography, electromyography (EMG) for the anterior temporalis (TA) and masseter muscles (MM), and mandibular movement (range of motion [ROM] and average chewing pattern [ACP]) were evaluated before (T0) and 7 to 8 months (T1) after the surgery. Results: There were no significant postoperative changes in the EMG potentials of the TA and MM in both groups, except in the anterior cotton roll biting test, in which the masticatory muscle activity had changed into an MM-dominant pattern postoperatively in both groups. In the experimental group, the amount of maximum opening, protrusion, and lateral excursion to the non-deviated side were significantly decreased. The turning point tended to be shorter and significantly moved medially during chewing in the non-deviated side in the experimental group. Conclusions: In skeletal Class III patients with facial asymmetry, the EMG activity characteristics recovered to presurgical levels within 7 to 8 months after the surgery. Correction of the asymmetry caused limitation in jaw movement in terms of both ROM and ACP on the non-deviated side.

• 동의생리병리학회지
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• 제23권1호
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• pp.225-231
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• 2009

The purpose of this study was to compare the effectiveness of Dangkisoo-san(Dangguixu-san) and Gamihwalhyul-tang(Jiaweihuoxie-tang) herb-medication for the Traffic accident patient group with the effectiveness of common herb-medication for the general patient group by using 7-Zone-Diagnostic System. Two groups were selected from those who took the CP-6000A test in College of Oriental Medical Hospital of Sangji University from March 2007 to January 2008. Mean values of Factor AA on Skin Resistance Variability(SRV) of two groups were compared. The mean values of the deviation between measurement and 50 in pre-examination was higher than those of post-examination. Especially, there were remarkable difference between the mean values of the deviation between measurement and 50 in pre-examination and those of post-examination within the general patient group. When we compare pre-examination with post-examination in each area, 2 areas have remarkable difference within the general patient group. The mean values of positive deviation in pre-examination was higher than those of post-examination within both group. Especially, the TA patient group was remarkable. The other side the mean values of negative deviation in pre-xamination was remarkably higher than those of post-examination within the general patient group. By contraries the mean values of negative deviation in pre-examination was lower than those of post-examination within the TA patient group. These results suggest that Dangkisoo-san(Dangguixu-san) and Gamihwalhyul-tang(Jiaweihuoxie-tang) herb-medication will be less effective for chronic and weak traffic accident patients.

• 조명전기설비학회논문지
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• 제26권6호
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• pp.8-15
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• 2012

In this paper, we investigated possible optical parameters causing deviation of experimentally observed output spectra from theoretically predicted results in a high-order fiber comb filter based on a polarization-diversity loop configuration. They include wavelength dependency of half-wave plates (HWPs) inserted in the filter for wavelength switching and the modal birefringence of single-mode fibers (SMFs) with which optical components comprising the filter are connected. In order to consider the effect of the modal birefringence of the SMF on a filter performance, it is modeled as a low birefringence fiber with an arbitrary orientation angle and birefringence. It is found from the simulation results that the modal birefringence of SMFs strongly affects the spectral characteristics of the filter and decreases the extinction ratio of the filter, compared with the wavelength dependency of HWPs. In particular, it is also confirmed that the spectral deviation and asymmetric distortions of side-lobes in narrow band transmission spectra result mainly from the modal birefringence of SMFs.

• Journal of Biosystems Engineering
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• 제5권1호
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• pp.58-65
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• 1980

Sinkage differences between the wheels of a transplanter which are caused by the different hard pan of fields and land preparation affect the field performance of a rice transplanter. In this experiment the relationships between the sinkage differences of the wheels of a transplanter and the planting distance, planting angle, planting depth and deviation from a straight transplanting line were investigated. The objective of this experiment was to obtain some basic informations for the effective use of the rice transplanter . The results of this experiment are as follows. 1. Transplanting distance became shorter as the sinkage differences increased. This effect was greater on the side of the transplanter with a shallower sinkage. 2. The depth of transplanting increased as the differences in the depth of sinkage increase for the side with the deeper sinkage. An opposite trend was observed for the side with shallower sinkage. 3. The angle of transplanted seedlings from the vertical portion increased slightly as the sinkage differences increased. The variation in results were greater from the side of the transplanter with deeper sinkage than with shallower sinkage. 5. The best postures of planted seedling were found when the water depth was 3 cm for the side of transplanter with deeper sinkage and 4 cm for the shallower sinkage side. The relationships between the postures of planted seedling and water depth. , or $y=67.62 + 10.69x-1.76x^2$ for the side of transplanter with deeper sinkage and $y=66.64+11.62x-1.50x^2$ for the side with shallower sinkage, were found from this experiment.

• 대한물리의학회지
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• 제9권3호
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• pp.243-248
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• 2014

PURPOSE: This study was aim to the change of muscle activities of lower extremity and waist during lifting a small object on the floor according to different foot position of women in their twenties wearing a skirt. METHODS: 9 women in their twenties wearing a skirt were selected and were measured the muscle activities of medial gastrocnemius (MG), tibialis anterior (TA), vastus lateralis (VL) and iliocostalis (IC) when they lifted a small object on the floor. The two different foot position employed were "both feet posed straight side by side" (condition 1) and "both feet posed diagonally to 45 degree" (condition 2) used. The order of feet position was selected randomly and the subject took a rest for 30 min between tests to prevent muscle fatigue. We calculated the mean and standard deviation of muscle activities and used Mann-Whitney U test to compare the difference between the two foot positions with SPSS(IBM Korea) RESULTS: The muscle activity of condition 2 was greater than that of condition 1 in right side of TA, VL, and IC and left side of TA, VL, MG and IC. The right side of TA, VL and left side VL were significant difference between condition 1 and condition 2(p<.05). CONCLUSION: We suggest "both feet posed straight side by side" position is better if a woman wearing a skirt lift the small object and it will help prevent the low back and lower limb problems in the future.

• 복식
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• 제55권5호
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• pp.87-100
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• 2005

This study was to provide the fundamental data for a scientific and rational clothing construction by investigating the length variation of the upper body surface, using the method of surgical tape. The subjects were 15 early elementary schoolgirls in Busan area classified by three somatotypes, Arm-movements were consisted of 6 types. The statistical analyses used in this study were mean, standard deviation and the ANOVA and LSD procedure. The results of the analysis of the length of the upper body surface are as follows: By arm-movements, in the items of horizontal, front neck base girth, back upper bust girth, back bust girth and back under bust girth were increased and the other standard lines were apt to be decreased. In the items of vertical, all standard lines of front side and side seam length showed increased, the lines of bark side were apt to be decreased. The shoulder length represented the maximum rate of decrease($-36.59\%{\~}-48.98\%$) in M6($180^{\circ}$) and the side seam showed the maximum rate of increase($49.74\%{\~}59.22\%$) in the same movement.