모델 불확실성에 강인한 유연구조물의 입력설계

황재혁,공병식 한국 항공대학교 항공산업기술연구소 1997 航空宇宙産業技術硏究所 硏究誌 Vol.7 No.-

This paper compares input shaping techniques for controlling residual vibration of flexible structures. Input shaper generates vibration-reducing shaped commands through convolution of an impulse sequence with the desired command. Both feed forward and feedback control approaches with/without input shaper for uncertain dynamical systems are investigated to evaluate the control performances. The control objective is to achieve a fast settling time and robustness to plant uncertainty, to eliminate residual vibrations. It is shown by a series of simulation that a properly designed feedback controller with input shaper performs well, as compared with open-loop controller with input shaper.

脂體不自由兒의 特殊學校의 再活訓練 基本模型

鄭載權,金東淵,裵晟洙,姜渭榮,元英祚,安秉輯 大邱大學校 特殊敎育總合硏究所 1983 特殊敎育硏究 Vol.10 No.-

The increasing stress on the need for standardized rehabilitation programs for the crippled has faced the workers in the field with the problems of finding out an ideal model of rehabilitation programs which can most facilitate maximum development of the children in various educational aspects. As part of the basic research, the study has been conducted to analyze the data on the present status of the six schools for the crippled in the country, together with other related survey on the available literature. Most of the data on the present situation of the schools and the status of the workers were obtained through questionnaires. The findings derived from the analysis of those data are as follows: 1. The Present Status of the Rehabilitation Training The survey revealed only forty-nine percent(381) of the entire subjects of 784students had been put to the training, that classroom lesson comprised 50% and 43% of the curricula in primary and secondary courses respectively, and that in the rehabilitation programs, physical therapy accounted for 50%, occupational therapy 31% and speech therapy 19%. As for the qualification of rehabilitation workers, twenty of the twenty-five who are presently serving at the six schools are license holders, averaging three physical therapists, 0ne occupational therapist and 0.2 speech therapist at each school. Ninety-six percent are junior college graduates and fifty-six percent are aged 20∼25,forty percent 26∼30. Eighty percent fall into the monthly pay range of 140,000 to 210,000 won, leaving the others below or above the scale. The study also showed that the cause or motivation of their becoming the workers was out of a sense of duty; seventy-six percent replied that they volunteered to help the crippled. Principals, the workers and special teachers showed in that order their enthusiasm about their enthusiasm about the rehabilitation prgrams. It was also found in the study that the authorities concerned have held a special guidance session once a year, achieving their annual goal only 50% and that most of the schools (82%) organized their own rehabilitation programs. The tools and other materials used in the programs were mostly(67%) domestic products. Four schools (67%) prepared thir own evaluation devices for the achievements of the trainees. 2. Facilities and Equipment for Rehabitition Training In all, thirty-four kinds of equipment and tools are currently provided at the six schools to help the chidren maintain or develop their residual function in the deficient limb. Of them only eighteen kinds were owned by each school, aberaging more than one; they were mats, walkers, parallel bars, mirrors, puzzle patches, stairs, shoulder wheels, tilt tables, walking aids, safety aids safety walking belts restorators, over head pulleys, knee exercise units, rotary wrist macihnes, holdings and gloves. The rest of the tools or apparatus averaged less than one among the schools. Nine kinds of electro therapeutic apparatus were owned by them, but only electrostimulation test machined lamps aberaged more than one. As for the hydro therapeutic apparatus, eight kinds were provided among the schools. Each school had more than one set of these three devices: hydor collator, whirl pool and hydro collator pack, with hydro collator pack averaging 17.33. They maintained thirteen kinds of occupational therapy appraratus, of which only three were owned by every school. Most of the apparatus were meant to deal with metallic works. Eleven sorts of speech therapy devices were found; only breathing exercise apparatus averaged more than one. The rehabilitation facilities and equipment at the schools are far below sufficient both in number and kind to meet the need. 3. Teacher' Attitude and Morale Toward the Rehabilitation Programs The schools for the crippled generally try to put equal emphasis on every field needed to rehabiletate the children but it was found that they were, intentionally or unintentionally, putting varying degrees of stresses on indivdual parts. The findings allowed making a list arranged in order of their priority: physical therapy, occupational therapy, speech therapy, motor development training and play therapy. The teachers responded that facilities, equipments, materials, parental cooperation, administravtive support and the ability of the rehabilitation workers were not sufficient enough to meet expectations. When asked to list the priority of the urgent fields, approximately percent put physical therapy at the top, twenty-one percent human relationships. The study showed teachers thought that the sense of duty (35%), ability and qualifications(21%), training skill(15%), academic career(13%) should be considered as the objective determinants in selecting a teacher, and 34% opined that a worker should have “ardent desire and sense of service”. Others expressed their opinion that understanding children's psychology(20%), having good knowledge of basic theory of the rehabilitation(19%) should be prerequisite to the service. Seventy-five percent of the teachers responded that rehabilitation training should be greatly improved and that they positively cooperated with the workers in the programs. It was inferred that the school administrators were generally affirmative towards the programs. The work-load of the rehabilitation workers was regarded as almost the same as that of special teachers(37%). The public and the education authorities assessed the ability of the workers "fair"(52%). Seventy-six percent of those who replied opined the financial support”, was "not sufficient", and seventy-one percent insisted the Ministry of Education should ear-mark special fund for the rehabilitation programs. As part of promotion measures, the majority of the replied(52%) reommended that authorization of more courses and expansion of the existing courses for the workers should be made, and the great majority(71%) advocated raising the special allowances, which was found to be the first in the order of priority, followed by the government's administrative and legislative support(26%) and development and development and supply of materials and equipment for the rehabilitation(22%). The analysis of the above data helped deduct a reasonable rehabilitation practice pattern in which the rehabilitation programs are adopted with the same weight as other parts of the curriculum such as classroom lessons or extra curricula activities, and the programs should cover, with an equal emphasis on every field physical therapy(functional training), occupational therapy (vocational training), speech therapy, sensory training(perception-motor training) and psychological training. Shown in IV-B are the tentatively listed basic sets of facilities and apparat believed indespensable in the rehabilitation programs. 4. Suggestions The following are the suggestion based on the results of the comprehensive study on the present rehabilitation practice in the country. (1) The rehabilitation programs which is to facilitate maximum motor-skill development should compulsorily be included in the curriculum of the school for the crippled. (2) The present training course of the rehabilitation workers should be reorganized to produce highly skilled rehabilition experts who will satisfactorily meet the need on the part of the children. Also desirable is the change of the present title of the workers "rehabilitation attendant" to "rehabilitation training teacher". In parallel with the intensification on training and requirement of the teachers, an increase in emolument to or level of the other special teachers should be made. (3) It is recommended that the programs be extended to other fields of special education, in view of the fact that the rehabilitation programs are basically meant to maintain, improve or eliminate any human defects.

煉炭灰를 利用한 土壤의 改良과 中和에 關한 硏究

曺在興,曺秉旭 朝鮮大學校 工科大學 1974 論文集 Vol.3 No.-

This study is carried out to find out how to neutralize and fertilize the acidified soil of this country by using briquette ash. In order to increase the alkali content in briquette ash, certain amount of shell-lime is added in the process of the manufacture of briquette. After examining the PH variation of the briquette ash and the charge in physical property and PH of the soil to which briquette ash is added, the practicability is considered in view of the calorific value and combustion temperature of the skell-lime added briquette. 1. The result obtained is that the PH of briquette ash is three or four times as high as that of Korean typical soil. 2. The result obtained is that the most favorable ratio of shell-lime in the briquette is 3 percent, considering the heat and combustion temperature when the briquette burns. 3. When briquette ash is added, the available water content increases by 36% (10.7%∼46.7%) and the bulk density of the soil decreases considerably.

Ⅲ급 부정교합자의 연조직 측모 감별에 관한 연구

황병남,이승훈,이정근,이재봉 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.2

This study was performed to investigate the characteristics of soft tissue profile of the class III malocclusion and to test the yardstick far differential diagnosis between surgical and orthodontic patients Initial lateral cephalograms of orthodontic group(30 patients) that have acceptable occlusion and profile by orthodontic treatment alone and surgical group(30 patients) that have favorable occlusion and profile by combined surgical-orthodontic treatment were selected in Ajou university hospital. Powell and Burstone II analysis were made on the tracing. Descriptive, comparative, factor, cluster, and discriminant analysis were carried out with computer program. The results were as followings : 1.Patients who received surgery had a more concave profile and a longer lower facial height than patients who received orthodontic treatment alone. 2.Nasolabial angle, ratio of vertical height, and mentolabial sulcus were significantly different at the 5% level. And facial protuberance, upper lip protuberance, mentocervical angle, nasofrontal angle, nasomental angle, mandibular vertical height, angle between cervix and lower face, ratio of mandibular vertical height divided by cervical depth, ratio of vertical height between upper and lower lip, and maxillary protuberance were significantly different at the 1% level. 3.8 factors were extracted and factor 2, 3, and 8 showed significant differences by factor analysis. 4.Orthodontic group (25) and surgical group (35) were classified by cluster analysis. 5.Discriminant function was D = 0.079Nasomental angle + 0.081Sn-Gn + 3.343Sn-Gn/C-Gn + 1.734Sn-St/St-Me'-26.460, and cutting score was 0, so we can discriminate that orthodontic group has the score above 0, and surgery group below 0. And 91.7% of original grouped cases were correctly classified.

상악 유측절치 부위의 유치 과잉치에 관한 증례보고

최병재,한효정,이제호,김성오,손흥규 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.1

과잉치란 치배 형성기 이상으로 유치열기와 영구치열기에 정상보다 많이 발생하게 된 치아를 말한다. 유치 과잉치의 빈도는 0.03~1.9%로 상악 유측절치 부위에 호발하고 대부분은 정상 치아 형태로 맹출하며 정상 시기에 탈락하므로 보호자들이 인식하지 못하는 경우가 많다. 과잉치의 발생에 대해서는 현재 치판의 과활성으로 인해 제 3의 치배가 발생한다는 가설이 널리 받아들여지고 있고 유치과잉치가 발생할 경우 영구치열기에는 정상 또는 비정상적인 형태의 계승 과잉치가 존대한다고 보고된 바 있다. 유치 과잉치의 약 75%는 정상적으로 맹출하고 탈락하기 때문에 특별한 처치는 필요하지 않지만 계승 영구치 맹출에 영향을 주는지를 관찰하기 위하여 정기적인 구강 및 방선학적 검사가 필요하다. 본 두 증례의 경우 정상 치아 형태의 유치 과잉치가 유전치부 발육 공간을 이용하여 상악 유측절치 부위에 맹출하였고 방사선 사진 검사 결과 유치 과잉치 하방에 매복된 계승 과잉치가 관찰되었으므로 이에 보고하는 바이다. Most supernumerary primary teeth erupt in the primary lateral incisor region and are reported to occur in 0.03 to 1.9% in the primary dentition. Most parents fail to recognize them because of their normal shape, eruption and exfoliation. Several theories have been proposed for the etiology of hyperdontia and the dental lamina hyperactivity theory is most widely accepted. When a supernumerary primary tooth develops. it is reported that there also exists a supplemental or rudimentary form of a succedaneous supernumerary tooth. Supernumerary primary teeth do not need specific treatment as 75% of them erupt and exfoliate normally. Only periodic radiographic exams are necessary to find out whether there is any problem with the eruption of the succedaneous tooth. In the following two cases, a supplemental supernumerary primary tooth with a loss of the anterior developmental space was observed at the maxillary lateral incisor region. Radiographic examination revealed an impacted succedaneous supernumerary tooth at the palatal side of the supernumerary primary tooth.

사람唾液 Superoxide Dismutase의 精製 및 性狀

이봉재,이병래,전현우,양종대,이근배 朝鮮大學校 附設 醫學硏究所 1986 The Medical Journal of Chosun University Vol.11 No.1

The purification and some properties of superoxide dismutase(O_(2-)-O_(2-) oxidoreductase, ECI. 15.1.1) of human saliva have been studied. Human saliva was collected from medical students, male and female together with smoking male students. The activity of superoxide dismutase was measured by the method of McCord and Fridovich. The superoxide dismutase was purified by ammonium sulfate precifitation, DEAE-cellulose and sephadex C-100 column chromatography. The results are summerized as follows : 1. Human saliva contain measurable amounts of superoxide dismutase. 2. The activities of superoxide dismutase. were 0.72U/㎖ in male and 0.73U/㎖ in female saliva. The activity of this enzyme was 0.81U/㎖ in smoker. Accodingly, there was no recognizabIe differences in the enzyme activity between smoker and non-smoker. 4. The human salivary superoxide dismutase was purified approximately 90 folds, and the molecular weight of the purified enzyme was estimated to be approximately 32,000 by gel filtretion. 4. Purified salivary superoxide dismutase has contained 1.83 atoms of copper and 2.00 atoms of zinc per molecule and was strikingly similar to the superoxide dismutase previonsly isolated from other cukaryotes by other investigatury. 5. The ultraviolet absorption spectrum of purified salivan- superoxide dismutase was 268㎚ which was similar to the value previously seen with the cytosolic enzyme of eukaryotes.

외상성 교합으로 인한 어린이의 치주질환

최병재,고동현,김성오,이제호,손흥규 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.3

외상성 교합은 교합력의 결과로서 치주조직에 가해지는 손상이다. 주된 증상은 치아의 동요도이고, 통증, 타진에 민감, 열에 민감한 증상이 동반될 수 있으며 교합력에 의해 치아가 이동을 할 수도 있다. 만성으로 진행시 치아의 과도한 교모가 나타나며 방사선학적으로 치근막 공간의 비후, 치조백선의 비후, 치조골의 방사선 투과성, 치근흡수 등이 나타날 수 있다.외상성 교합은 치주질환의 원인과 관련되어 있다. 증가된 치아동요도를 야기하며 외상성 교합 자체는 치은염과 치주낭을 발생시키지 않으나 국소적 치태와 염증이 존재하고 있는 하에서 골소실, 치주낭이 발생할 수 있다. 치은퇴축은 외상성 반월, 맥콜스 팽윤, 스틸만 균열의 형태로 나타난다. 본 증례는 하악 유견치 부위의 치주질환을 주소로 내원한 5세 남아로서 상하악 유견치의 조기 접촉에 의해 하악 좌우측 유견치의 중증도의 동요도, 교합마모, 치은 퇴축, 치조골 파괴의 증상이 나타났기에 보고하는 바이다. Trauma from occlusion(TFO) is injury to the periodontal tissue as a result of occlusal forces. Mobility is a common clinical sign of occlusal trauma. In acute occlusal trauma, this may be accomanied by pain, tenderness to percussion, thermal sensitivity, and pathologic tooth migration. Chronic occlusal trauma may be marked by excessive wear and gingival recession. Radiographic finding include a widened periodontal ligament space, radiolucence and condensation of the alveolar bone, and root resorption. TFO is related to the pathogenesis of periodontal disease. It can cause increased tooth mobility. TFO itself does not initate or aggravate marginal gingivitis or initiate periodontal pockets. Active trauma can accelerate bone loss, pocket formation and gingival recession depending on the presence of local irritants and inflammation. Gingival recession associated with occlusal forces includes traumatic crescent, McCall's festoon and Stillman's cleft. TFO plays a minor role in the pathogenesis of early to moderate periodontitis. A 5-year-old male visited Yonsei University Pedodontics clinic with a chief complaint about gingival recession. Mobility, excessive wear, gingival recession were detected by clinical exam on the both mandibular deciduous canine. On the radiographic view, vertical alveolar bone loss was observed on both mandibular deciduous canine.

표면도포제에 따른 수복용 글라스아이오노머 세멘트의 표면조도 비교

최병재,황동환 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.4

The purpose of this paper is to investigate the surface roughness of glass ionomer cement during initial setting time followed by applying surface coating agent. No other finishing or polishing procedure is done and each surface coating agents (varnish, adhesive, gloss, sealant) are used after filling of glass ionomer cement. Surface roughness indices(Ra) are measured and surface contours are obtained electronically by Surfcorder SEF-30D(Ko-saka laboratory Ltd. Japan). The results are as follows: 1. During initial setting time, surface roughness increases slightly regardless of surface coating agents. But it is statistically insignificant. (p>0.05). 2. Among surface coating agents used, Ra indices of group using varnish are high significantly compared to other groups regardless of elapsed time.(p<0.05) Among the groups which has used other surface coating agents except for the varnish group, similar Ra index all over the experiment is obtained, when compared to control group (no agent). 3. If no surface treatment is performed, tri-cure glass ionomer cement (Vitremer) has higher Ra Index than light cure glass ionomer cement (Fuji Ⅱ LC) (t<0.05). But there is no difference between two groups in RA index if any kinds of agents are applied except for sealant. (t>0.05)

학교체육 활성화 방안에 대한 연구(Ⅰ) : 강원대학교 교양체육 운영방법의 개선을 중심으로

이광재,문병용,노성규,박기동,홍관이,한상준,유옥재,엄기진,정청자,오수일,김윤래,박장평,부기원 江原大學校附設 體育科學硏究所 1986 江原大學校附設體育科學硏究所論文集 Vol.- No.11

Try to find a scheme for activation to College Physical Education, this Report informs the various kinds of Survey and process those were projected for improvement of management methods on Cultural Physical Education in Kang Weon National University. From experimentally carried out "Sports events Choosing System" not as usual be inforced "Total practical Skill System", Following Positive effects and sujestions were Presented; 1. "Sports events choosing system" gave birth to more students' interesting and more voluntary participation to the sports events they chose, and sports skill and instruction level was elevated due to charge of expert according to each sports events. This system would be managed continuously hereafter for it related to life sports. 2. This System needs to closed cooperations between College and Community, for the facilities of community are utilized by college. 3. To complete the plan for activation of college Physical Education, additionally, the successional study ; namely "autonomous extracurricular sports activity" should be excuted hereafter.

흰쥐의 발치아에 이식된 태아 치아싹의 발육

최병재,장석철,정한성,이제호,김성오 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.1

정상적인 치열의 형성 및 치아의 생성과정을 분석하고 실제로 임상에 적용하기 위해 치아의 발생과정을 연구하는 것은 매우 중요하다. 본 연구는 이식된 태아 치아싹의 석회화가 가능하고 정상적인 구조로 발육할 수 있는지 밝히기 위해, 그리고 악골 자체가 새로운 이식 공여부로 사용가능한지 알기 위해 흰쥐의 발치와에 치아싹을 이식하여 치아의 형성을 살펴보고자 하였다. 이를 위하여 성숙한 흰쥐의 상악 제 1구치를 발거한 발치와에 13.5일된 태아쥐의 치아싹을 이식한 후 4,8주 후에 희생하여 조직학적 및 방사선학적으로 관찰하여 다음과 같은 결과를 얻었다. 1. 이식된 치아싹에서 상아질과 백악질, 치수, 치주인대의 소견을 갖는 석회화된 조직이 형성되었다. 2. 형성된 경조직 및 연조직은 정상적인 치아형성과정에 비해 발육이 늦었으며 유착 및 골양상아질(osteodentin)과 같은 비정상적 조직이 관찰되었다. 3. 석회화된 조직은 8주내에 악궁으로 맹출하는 소견이 관찰되지 않았다. The developmental process of a tooth is being presented as an important study subject to analyze formation of normal dental arch and tooth. The purpose of this study was to see the formation of tooth from a tooth bud transplanted in a white rat regarding that the jawbone could be used as a new donor site of a trasplant. The first molar of a matured white rat was extracted and the tooth bud of a 13.5 day rat embryo was transplanted. The histological and radiographical results after 4 and 8 weeks respectively are as the following. 1. Calcification in dentin, cementum, pulp and periodontal ligament was formed from the tooth bud transplanted in the alveolar socket. 2. The development of hard and soft tissue was delayed compared to the normal tooth formation and abnormal histologic features such as ankylosis and osteodentin were found. 3. The formed hard tissue did not erupt into the jaw within 8 weeks.