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문행자 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6
Since the themes of dance sports take up various subjects ranging from the concrete to the abstract, it is quite difficult for instructors to grasp the images that learners have in mind just by observing the movements expressed by learners. That's why instructors tend to relate the learners' movements to the images which the instructors have in mind when they observe the learners' movement, In this study, we researched ways to confirm the sequencing of the internal thought processes in learning as they are preparing to initiate a particular dance sports movement, In other words, we looked at ways to accurately evaluate a dance sports athlete's mental state from the movement of first visualizing a particular movement through to when they actually perform that movement. With this goal in mind, we chose to study athletes learning the "flapping of a big-sized bird" theme, since the mechanisms of this dance sports movement can be comparatively easily grasped and its motions duplicated even by beginning dance sports athletes. As a hypothesis, we producted a model explaining the sequencing of this thought process, diving it into three forms or kinds of images : (1) the imaging of a flapping bird, (2) the imagining of becoming a flapping bird, (3) the imagining of expressing this in dance sports movement. For this study, we did pre-tests on unexperienced primary school students, junior high school students, university students and experienced dance sports athletes. (1) We have to show the flapping movements of at least 4 kinds of flying movements of birds through TV screens in order to assume our ability to identify the flapping of the bird which the subjects have pictured in their minds. (2) We must have a check list to replaced the flapping movements of a bird with human movements and check by TV screens when we want to identify the imagining of expressing dance sports movement. We conclude that instructors can confirm and share what the subjects have picture in their minds by making subjects choose what they imagined from among images showed on the TV screens.
댄스스포츠 선수의 고강도 트레이닝 후의 골격근 완충 능력과 지구적 성과 분석
문행자 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6
The main purpose of this treatise is to discover whether or not there was any improvement in skeletal buffet effect, activation of enzyme or any improvement in outcome after taping HIT of maximum intensity for woman dance sports athletes who already possess persistent strength The result of this study demonstrated that B times of HIT adopted for training of 28 days produced significant improvement in buffer effect of skeletal muscle, peak power, highly intensive training persisting time and 40km time trial. On the other hand no significant change was confirmed with activation of enzyme. It is believed that ability to buffer hydrogen in is related to dance and sprint type exercise entailing excessive storage of hydrogen ion storage. It is also believed in general that those who are training in dance and sprint have higher Ievel of buffer effect of skeletal muscle than ordinary people. But reportedly no change in buffer effect was identified from the result of carrying out supramaxial exercise (exercise which is more than level of exercise which is realizable at the time of having maximum oxygen absorption). The subjects of this study were well trained dance sports athletes and interrelationship has been confirmed. Such fact suggests that effect of improving result may be engendered for those who are well trained and show high level in maximum oxygen absorption. This author investigated oxygen density in blood of the subjects mentioned above during 40km time trial and could find out it was 6-8mmol/ℓ. Like this reportedly when oxygen density in blood was high then hydrogen Ion was produced causing decline of pH in blood leading to decline in contractility of skeletal muscle, Through this study this author could confirm that HIT brought about improvement in buffer effect and it discouraged decline of pH in muscle or in blood and engendered significant improvement in the outcome of time trial. Furthermore buffer effect of skeletal muscle was higher with Type Ⅱ athletes rather than Type Ⅰ athletes. Accordingly it is supposed that Type Ⅱ athlete was more well adjusted to training rather than Type Ⅰ athlete in connection with HIT of this study. In the HIT on the untrained subject it was reported that there was significant improvement in PFK, lactate dehydrogenase and activation of oxidized enzyme. However in this treatise where trained athletes were subjects of the study there was no statistical significance although there was some increase in PFK and HK without any change in CS and 3-HAD. Also it was reported that for the trained athletes no effect of lactate dehydrogenase could be confirmed. In this study no change was found also with CS, which is oxidization enzyme of muscle, by HIT. In preceding studies where trained people were used as subjects of such studies same kind of results were reported, from such result it le suggested that skeletal rruascle"s adaptation to activation of enzyme through training was influenced by level of drilling prior to training. From the above mentioned fact it was suggested that effect of improvement in result by HIT for well trained athletes was engendered by improvement in buffer effect rather than activation of enzyme of skeletal muscle.
문관호,김항욱 한국항공대학교 1986 論文集 Vol.24 No.-
A Finite Element Model based on the super-parametric shell element is studied for the dynamic analysis of rotating structure of arbitrary shape and thickness. The linearized equations of motion derived for the rotating structure, including the effect of the centrifugal mass, centrifugal force vector and the pseudo static equilibribrium position, have good accuracy and save the cumputational time, instead of complexity of the non-linear one previously studied. The power of the method is illustrated by applying it to a pretwisted rectangular plate and tapered cylinderical type blade.
도시속의 자연경관보전을 위한 도시계획관련 법과 제도에 관한 연구
김항집,최봉문,이건호 牧園大學校 建築·都市硏究센터 1995 建築·都市環境硏究 Vol.3 No.-
Recently, the desire for better quality of urban environment go on increasing rapidly because the provlems of environment become more seriously in all around the world. And also because of the change of social concepts, the importance of urban landscape which is perceived as one of main factors of amenity in city grows significally. But Urban Planning Systems and Laws in Korea do not provide the effective tools to preserve urban landscape. So, in this paper, we try to find some methods tho preserve urban landscape by the means of Urban Planning System and Law System.
무기력(Helplessness) 개념 분석:혼종 모형(Hybrid Model) 적용
손행미,김인자,서문자,김은만,황지인 서울대학교 간호대학 간호과학연구소 1999 간호학 논문집 Vol.13 No.2
The concept of helplessness was analyzed with Hybrid model. Hybrid model is consisted of 3 phases: the theoretical, the field, and the analytical phase. In the theoretical phase, the nature or definition, antecedents and results of the helpessness were identified. The helplessness was defined as 'the perception of uncontrollable outcome'. That perception was formed from 'the repeated experience of the response-outcome independence', 'the instruction specifying the nature of the task or problem', and 'individual difference'. And the helplessness resulted in 'emotional deficit', 'performance deficit' and 'functional disability'. In the field phase, four patients with chronic renal disease were interviewed. They were all treating by hemodialysis. And they all perceived that their disease was uncontrollable. The interview data were analyzed with theoretical coding. All of them show the external, stable, and global helplessness. In the analytical phase the antecedent was identified as 'the instruction specifying the nature of task or problem' & 'the repeated experience of response-outcome independence'. And most of them are helpless due to the 'the instruction specifying the nature of the task or problem'. As the result of the helpessness, 'negative affect', 'non-compliance', 'passive compliance', 'functional disability' and 'social isolation' were identified. The performance deficit is distinctively divided by 'non-compliance' and 'passive compliance'. So the performance deficit is changed to 'non- compliance' and 'passive compliance'. It is proved that the hybrid model was appropriate for the concept analysis especially in case that the subjects are different in the theory developing that concept. And these results could be applied as the theoretical framework for the research and the nursing intervention.
파노라마방사선사진에서의 하악관의 각도와 이공의 위치에 관한 연구
최항문 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2
Purpose : To assess the angle between mandibular canal and occlusal plane at each posterior tooth region and location of mental foramen on the panoramic radiographs. Materials and Methods : This study analysed 46 half-mandibles of panoramic radiographs. Inferior border of mandibular canal was traced. Occlusal plane was drawn from lingual cusp tip of the first premolar to distolingual cusp tip of the second molar. Perpendicular line from occlusal plane was drawn at each tooth region and then tangential lines were drawn from the crossing points at canal. the angle between occlusal plane and tangential line was measured. The location of mental foramen was also studied. According to the location of mental foramen, radiographs were divided into M (mesial) group and D (distal) group on the basis of the second premolar. and then inter-group analysis about mandibular canal angle was done. Results : The angles of mandibular canals were -17.7°, -9.5°, 8.2°, 22.3°, and 39.2° at first premolar, second premolar, first molar, second molar, and third molar, respectively. The commonest position of the mental foramen was distal to the second premolar. Inter-group comparison showed statistically significant difference at the second premolar and the first mo1ar(p<0.001). Conclusion : The knowledge of mandibular canal angle and location of mental foramen can help understanding the course of mandibular canal.
하악관 위치 분석시 일반단층사진과 전산화단층사진의 비교연구
최항문,유동수 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.2
The purpose of this study was comparision of conventional tomography with reformatted computed tomography for dental implant in locating the mandibular canal. Five dogs were used and after conventional tomographs and reformatted computed tomographs were taken, four dentist traced all films. Mandibles were sectioned with 2mm slice thickness and the sections were then radiographed(contact radiography). Each radiographic image was traced and linear measurements were made from mandibular canal to alveolar crest, buccal cortex, lingual cortex, and inferior border. Following results were acquired : 1. Reformatted computed tomographs were exacter than conventional tomography by alveolar crest to canal length of -0.6mm difference between real values and radiographs. 2. The average measurements of buccal cortex to mandibular canal width and lingual cortex to mandibular canal width of conventional tomographs were exacter than reformatted computed tomographs, but standard deviations were higher than reformatted computed tomographs. 3. Standard deviations of reformatted computed tomographs were lower than conventional tomographs at all comparing sites 4. At reformatted computed tomography 62.5% of the measurements performed were within ±1mm of the true value, and at conventional tomography 24.1% were. 5. Mandibular canal invisibility was 0.8% at reformatted computed tomography and 9.2% at conventional tomography. Reformatted computed tomography has been shown to be more useful radiographic technique for assessment of the mandibular canal than conventional tomography.
치아우식중 진단시 임상검사와 파노라마방사선사진검사의 탐지능 비교
최항문 大韓口腔顎顔面 放射線學會 1999 Imaging Science in Dentistry Vol.29 No.1
Purpose: The objective of this study was to compare clinical examination of dental caries and secondary caries with panoramic examination, and to examine bone lesions and dental anomaly of unerupted state. Materials and Methods: In this study, clinical records and panoramic radiographs were available for 89 first grade students in elementary school. Dental caries of occlusal surfaces, proximal surfaces, and buccolingual surfaces were examined. Secondary caries was examined too. In addition, the central lesion and dental anomaly of unerupted state were examined in panoramic radiographs. Results: The obtained results were as followed: 1. Carious detectability of clinical examination in occlusal and buccolingual surface was higher than that of panoramic examination, but it is statistically insignificant(p>0.05). In proximal surface, carious detectability of panoramic examination was higher than that of clinical examination, and it is statistically significant(p<0.01). 2. In contrast to clinical examination only, when the two examination methods were combined, there was additional detection of dental caries(26.7% in occlusal surface, 48.2% in proximal surface, 33.3% in buccolingual surface, and 38.3% totally). 3. In detection of secondary caries, panoramic examination had lower ability than clinical examination in all three surfaces, but in case that both methods were combined, totally 36.0% extra carious lesions were detected. 4. In panoramic examination, detectability of secodary caries in upper teeth is lower than lower teeth. 5. In panoramic examination, it was possible to detect the central lesions and dental anomalies of unerupted state which cannot be detected in clinical examination. Conclusion: It is useful to combine the panoramic examination with clinical examination in order to increase carious detectability and to evaluate the central lesions and dental anomalies of unerupted state.(J Korean Oral Maxillofac Radiol 1999:29:273-280)
최항문,이원진,허민석,이삼선,김정화,최순철,박태원 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1
Purpose : To find the cause of root curvature by use of panoramic and lateral cephalometric radiograph. Materials and Methods : Twenty six 1st graders whose mandibular 1st molars just emerged into the mouth were selected. Panoramic and lateral cephalometric radiograph were taken at grade 1 and 6, longitudinally. In cephalometric radio graph, mandibular plane angle, ramus-occlusal plane angle, gonial angle, and gonion-gnathion distance (Go-Gn distance) were measured. In panoramic radio graph, elongated root length and root angle were measured by means of digital subtraction radiography. Occlusal plane-tooth axis angle was measured, too. Pearson correlations were used to evaluate the relationships between root curvature and elongated length and longitudinal variations of all variables. Multiple regression equation using related variables was computed. Results : The Pearson correlation coefficient between curved angle and longitudinal variations of occlusal plane-tooth axis angle and ramus-occlusal plane angle was 0.350 and 0.401, respectively (p<0.05). There was no significant correlation between elongated root length and longitudinal variations of all variables. The resulting regression equation was Y=10.209+0.208X_(1)+0.745X_(2) (Y: root angle, X_(1): variation of occlusal plane-tooth axis angle, X_(2): variation of ramus-occlusal plane angle). Conclusion: It was suspected that the reasons of root curvature were change of tooth axis caused by contact with 2nd deciduous tooth and amount of mesial and superior movement related to change of occlusal plane. (Korean J Oral Maxillofac Radiol 2006; 36 : 55-62)
전악치근단방사선사진촬영, 파노라마방사선사진촬영 및 협각단층촬영시의 흡수선량
최순철,최항문 大韓口腔顎顔面 放射線學會 1999 Imaging Science in Dentistry Vol.29 No.1
Purpose: The objective of this study was to evaluate the possibility of substitution of the zonography for the full-mouth periapical radiography in aspect of radiation protection. Materials and Methods: Rando phantom and LiF TLD chips were used for dosimetry. The absorbed doses at brain, skin above the TMJ, parotid gland, bone marrow in the mandibular body, and thyroid gland during the full-mouth periapical radiography, panoramic radiography, and zonography were measured. Results: From the zonography, the absorbed doses to the brain, the skin over the TMJ, and the parotid gland were relatively high, but the absorbed doses to the bone marrow in the mandibular body and, especially, the thyroid gland were very low. Conclusion: The zonography can be an alternative to the full-mouth periapical radiography in aspect of radiation protection.(J Korean Oral Maxillofac Radiol 1999:29:253-258)