• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
• /
• pp.450-452
• /
• 2004

Every movement, perception and thought we perform is associated with distinct neural activation patterns. Neurons in the brain communicate with each other by sending electrical impulses that produce currents. These currents give rise to electrical fields that can be measured outside the head. It shows some variation on the electroencephalographic signals. In recent devices, the EEG signals measured from head surface are a sum of all the momentary brain activation. With these EEG signals, it is difficult to distinguish the patterns correlated with a certain event from the signals. However, the system must discriminate some patterns with some events especially for any kind of device as a brain control interface system. In this experiment, the sensory-motor cortex of humans has been extensively studied. Activation related to several movements on both sides of the sensory-motor cortices in imaginary. The activation patterns during imagination of several movements resemble the activation patterns during preparation of movements. The result represents the system based on the optimal filters discriminated at least 60% of mental imageries.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2001년도 ICCAS
• /
• pp.86.4-86
• /
• 2001

This paper presents the results of a visualization analysis of the correlation between the fiber orientation and flow pattern in injection molding using the Gate-magnetization method developed for the precise visualization of melt flow. The results of the comparisons of the fiber orientation angles with the flow patterns by the Gate-Magnetization method for GPPS mixed with glass fibers show the strong correlation between the flow patterns and fiber orientation angles. According to forward movement of the flow, the fiber orientation patterns move toward the side walls following the flow patterns. These results elucidate that fibers are oriented in the expansion process of the melt, and ...

• PNF and Movement
• /
• 제10권4호
• /
• pp.65-69
• /
• 2012

Purpose : The purpose of this study was to verify effects of trunk inclination, side deviation using combined PNF patterns of upper and lower extremities on 20's generation with malalignment syndrome. Methods : 15 subjects with malalignment syndrome participated this study. We measured 2 factors(trunk inclination, side deviation). combined PNF patterns of upper and lower extremities were used intervention method for malalignment syndrome subjects. Experience during was 6 weeks. Results : The trunk inclination was significantly decreased. The value was from 0.87 to 0.43(p=0.27). The side deviation was too. The value was decreased 1.62(p=0.044). Conclusion : The results of this study indicate that the use of combined PNF patterns of upper and lower extremities for malalignment syndrome people was positive effect.

• 대한치과교정학회지
• /
• 제42권5호
• /
• pp.227-234
• /
• 2012

Objective: To evaluate the presurgical orthodontic tooth movement of mandibular teeth after dental decompensation for skeletal Class III deformities on the basis of vertical skeletal patterns. Methods: This cohort was comprised of 62 patients who received presurgical orthodontic treatment. These patients were divided into 3 groups according to their vertical skeletal patterns. Changes in the positions of the mandibular central incisor, canine, premolar, and 1st molar after presurgical orthodontic treatment were measured using a cone-beam computed tomography (CBCT) superimposition method. Results: The incisors moved forward after dental decompensation in all 3 groups. The canines in group I and the 1st premolars in groups I and III also moved forward. The incisors and canines were extruded in groups I and II. The 1st and 2nd premolars were also extruded in all groups. Vertical changes in the 1st premolars differed significantly between the groups. We also observed lateral movement of the canines in group III and of the 1st premolar, 2nd premolar, and 1st molar in all 3 groups (p < 0.05). Conclusions: Movement of the mandibular incisors and premolars resolved the dental compensation. The skeletal facial pattern did not affect the dental decompensation, except in the case of vertical changes of the 1st premolars.

• 한국영어학회지:영어학
• /
• 제4권2호
• /
• pp.117-149
• /
• 2004

The paper is to argue against the asymmetric CP-V2 analysis of Old English, according to which finite verbs invariably undergo movement into a clause-final T within subordinate clauses and reach the functional head C within main clauses. The asymmetric CP-V2 analysis, first of all, faces difficulty in explaining a wide range of post-verbal elements within subordinate clauses. To resolve the problem, the analysis has to abandon the obligatoriness of V-to-T movement or introduce various types of extraposition whose status is dubious as a legitimate syntactic operation. Obligatory V-to-T movement in Old English lacks conceptual justification as well. Crosslinguistic evidence reveals that morphological richness in verbal inflection cannot entail overt verb movement. Moreover, the operation is always string-vacuous under the asymmetric CP- V2 analysis and has no effect at the interfaces, in violation of the principle of economy. The distribution of Old English finite verbs in main clauses also undermines the asymmetric CP-V2 analysis. Conceptually speaking, a proper syntactic trigger cannot be confirmed to motivate obligatory verb movement to C. The operation not only gets little support from nominative Case marking, the distribution of expletives, or complementizer agreement but also requires the unconvincing stipulation that expletives as well as sentence-initial subjects result from string-vacuous topicalization. Finally, textual evidence testifies that Old English sometimes permits non-V2 ordering patterns, many of which remain unexplained under the asymmetric CP-V2 analysis.

• 한국운동역학회지
• /
• 제33권3호
• /
• pp.85-93
• /
• 2023

Objective: This study examined differences in joint kinematics and movement variability of lower extremity between adolescent athletes with and without lateral ankle sprain (LAS) history during drop vertical jump. Method: Fourteen adolescent athletes with LAS history and 14 controls participated in this study. The independent variable was group while dependent variables were 3D joint kinematics and movement variability of hip, knee, and ankle joint. Ensemble curve analyses were conducted to identify differences in movement strategies between two groups. Results: The LAS group showed that greater eversion during jump phase compared with the control group. Additionally, less movement variability was found in the LAS group during the pre-landing and jump phases in ankle and hip joints compared with the control group. Conclusion: The LAS group may adapt the environmental constraints by reducing the movement variability in ankle and hip joints. However, training programs focusing on recovery of ankle function should be emphasized after LAS because excessive pronation for prevention of LAS during the jump phase may result in reduced performance.

• 한국의류산업학회지
• /
• 제8권1호
• /
• pp.99-106
• /
• 2006

With the growing interest in pet dogs and pet dog's wear I used this study to compare and analyze the pattern used by each supplier and developed a new pattern for pet dogs' wear which is appropriate for pet dogs' body lines and movement. Test subjects were 91 pet dogs in Busan and after comparing 3 patterns from different suppliers, I developed the pattern reflecting pet dogs' body shapes and movement. Results are as follows; 1) As a result of analyzing measurements, it was found that pet dogs motion in walking on four feet, is different from that of people on two feet. For center measurements, their waist to bust length is longer than their waist to back length. The result of analysis shows that bust circumference impacts most other measurement results and it seems that better results are achieved if the bust line is taken into consideration when measuring bust back length, bust front length, neck base circumference, front leg arc, the length between lateral shoulder etc. 2) As a result of comparing suppliers' patterns, it was discovered that each supplier has different sizes for the same patterns and those sizes are not standardized across the board. Even if the same size of pattern was actually used in the production of pet dogs' wear by the individual companies, there were many variations in size for each item. 3) To develop a more standard pattern of pet dogs' wear, I collected and analyzed 3 patterns from each supplier and designed a new pattern, revising it three times. After test-wearing of the experimental pattern and the studied patterns, and comparing and analyzing the results, the studied pattern had similarly better estimation than the experimental one.

• 한국운동역학회지
• /
• 제18권3호
• /
• pp.83-92
• /
• 2008

본 연구는 외측운동과 비교하여 양측운동의 운동형태와 속도에 따른 역학적 특성을 규명하는데 그 목적이 있다. 이를 위해 13명의 20-30대 남성을 대상으로 좌우 외발과 양발의 등속성 무릎 굴곡과 신전을 3가지 속도(120, 240, $450^{\circ}$/s)에서 실시하였다. 분석 결과, 3가지 속도의 무릎의 굴곡과 신전에서 대체적으로 외측운동의 합보다 양측운동에서의 역학적 출력(토크와 파워)이 감소하는 양측운동손실이 나타났다. 그러나 $450^{\circ}$/s의 신전에서는 양측운동에서 오히려 토크의 증가하는 양측운동강화가 나타났다. 특히 동일 근육에서 발생하는 각 개인의 양측운동지수는 운동속도가 변하더라도 일정 부분 유의한 상관을 보였다(120신전-240신전, 120굴곡-240굴곡, 240굴곡-450굴곡). 반면 굴곡과 신전과 같이 주동근이 다른 운동에서 집단 전체의 양측운동지수는 속도에 따라 유사한 패턴의 경향을 보였으나 각 개인의 양측운동지수는 유의한 상관이 나타나지 않았다. 이를 통해 각 개인의 근신경적 특성이 양측운동의 결과를 좌우하는 주요한 요인이 될 수 있음을 추측할 수 있다.

• 대한치과교정학회지
• /
• 제14권1호
• /
• pp.65-81
• /
• 1984

In order to observe the responses of the periodontal tissue on the tension side following the experimental tooth movement, 35 Guinea pigs were divided into the control group (5 animals) and 6 experimental groups (3 movement groups and 3 retention groups) consisting of each 5 animals. The experimental tooth movement of Guinea pig's upper incisors installing open helical loop were carried out by rendering continuous force : 5g (1st groups) 35g (2nd groups), 100g (3rd groups), respectively for 7 days. 3 movement groups (15 animals) were sacrificed soon after the continuous force, and 3 retention groups (15 animals) were sacrificed after the retention period of another 7 days. The following results were obtained from the observation of the surrounding tissues of teeth on the tension side through light microscopy any transmission electron microscopy. 1. The vessel walls in the experimental groups were thinner than those of the control group, the number of blood vessel had the tendency to increase. The greater the strong force applied to each group, the more the destruction of cells and fibers was found and the more the number of the red blood cell of vessel outside appeared. 2. New collagen fibers were produced from fibroblasts in the 1st groups (light force), but were produced rather less in the 2nd groups (medium force) and the 3rd groups (heavy force). 3. In the forming patterns of the new alveolar bone of the 3rd groups (heavy force), the bone trabeculae were formed towards the direction of the force to be applied, but the new alveolar bone in the 1st groups (light force) was produced evenly throughout the all surfaces of the alveolar bone rather than the patterns of bone trabeculae ; therefore, the patterns of new alveolar bone were observed differently according to the magnitude of the force applied. 4. In the retention group, it was observed that the collagen fibers were produced from the osteoblasts in the marginal areas of the periodontal ligaments being widely opened and were deposited on the alveolar bone surface but the production of collagen fibers from the osteoblasts in the other area of the periodontal ligaments was almost ceased, and a rest line on the new alveolar bone surface was found.

• 정보처리학회논문지B
• /
• 제9B권5호
• /
• pp.663-672
• /
• 2002

본 논문에서는 자동 추적 시스템을 이용하여 카바메이트 계열의 농약인 카보퓨란의 치명적인 투여에 대하여 반자연적인 조건에서 반응하는 깔따구의 움직임을 관찰하였다. 4령기에 있는 깔따구를 $6cm\times{7cm}\times{2.5cm}$ 크기의 서식 장소와 $18^\circ{C}$의 수온, 명기와 암기를 각각 10시간, 14시간의 조건에서 관찰을 하였다. 추적 시스템은 깔따구 몸체의 부분 점들을 탐지하여 추적하도록 하였다. 모든 실험은 반자연적인(semi-natural) 상태에서 진행되었으며 약제 카보퓨란(Carbofuran 0.1mg/l) 처리 전 후 이틀씩 모두 4일에 걸쳐서 연속적으로 진행되었다. 실험 결과 약제의 처리후에 압축된 지그제그 형태로 나타나는 "떨림 현상"과 같은 비정규적인 행동들이 종종 나타남을 알 수 있었다. 약제 처리된 종들의 행동 변화를 탐지하기 위하여, 웨이블릿 분석이 다른 움직임 패턴들을 특징화하기 위하여 사용되었다. 이산 웨이블릿에 기반하여 추출된 파라미터들은 약제처리 전후의 움직임에 대한 다른 유형의 패턴들을 표현하기 위하여 인공 신경망을 통하여 학습되었다. 이러한 웨이블릿과 인공 신경망의 통합 모델은 특징화된 움직임 패턴들의 발생 시점을 탐지할 수 있었으며, 수질 모니터링을 위한 독성 물질의 유입을 자동으로 탐지할 수 있는 도구로써 사용될 수 있음을 알 수 있었다.을 알 수 있었다.