알루미늄 합금과 고장력 강판 접합을 위한 헬리컬 SPR의 단조공정 설계

김원영, 김동범, 김기호, 김도훈, 이인환, 조해용 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2

A self-piercing rivet(SPR) is a mechanical component for joining dissimilar materials. It is used for joining dissimilar material sheets such as aluminum alloy and steel. The self-piercing rivet directly pierces into sheets without drilling sheets beforehand unlike conventional rivets. However, the self-piercing rivet occurs buckling when piercing high strength steel. Therefore, a helical SPR which can pierce high strength steel sheet was designed. In this study, forging process was designed for manufacturing the helical SPR and simulated by using commercial FEM code DEFORM-3D. In the simulation of forging process for manufacturing rivet, process sequence, formability, forging load were investigated. The suitable forging process could be designed by comparisons of simulated results. Experimental trials have been carried out for same conditions as simulated ones. The simulated results agreed with the experimental ones. So, the analytic approach in this thesis is useful to save cost and time in the forging industry

상(aspect)의 이중적 본질에 관한 연구

최해영 서경대학교 인문과학연구소 1997 人文科學硏究 Vol.2 No.-

This thesis aims to analyze the dual nature of the English aspect, which consists of the verbal lexical meaning and the inherent temporal semantic feature of the situation. The aspect has inseparable relationship to aktionsart, as the former is a grammatical category representing the speaker's viewpoint on the situation indicated by the verb and the latter is a objective category representing the inherent temporal feature of the verb, its NP arguments and adverbials etc. I am arguing that the interpretation of the aspectual meaning should be considered into the mechanical combination of the aspect and aktionsart.

상조동사(aspectualizers)에 관한 연구

최해영 서경대학교 인문과학연구소 1997 人文科學硏究 Vol.3 No.-

This thesis aims to analyze the meaning of aspectualizers by aktionsarten. In view of their analyses aspectualizers and their conplement verbals form a single semantic and functional criteria for auxiliary membership. Semantically, they are analysable using logical or relational features alone, without reference to lexical features. They qualify as auxiliary verbs under a universal definition of a clausal operator. Aspectualizers and other catenatives are functionally equivalent to the traditionally recognized auxiliaries, and functionally distinct from the corresponding full verbs. Finally, aspectualizers interact with the other aspectual features of the context in a manner analogous to that of the accepted aspect auxiliaries, have and be aspectralizers are freely combined with activities and accomplishments, but they have the restriction of combination with states and achievements. These grammatical qualities between aspectualizers and the verbal classes are the same as the progressive aspect.

분자선 에피탁시로 Si 기판 위에 성장한 GaAs/Ge 에피층의 특성

우용득,이해익 우석대학교 부설 기초과학연구소 1997 기초과학연구소 논문집 Vol.2 No.-

Properties of GaAs/Ge epilayers grown using two step growth method on Si substrates by molecular beam epitaxy(MBE) are investigated using scanning electron microscopy(SEM), transmission electron microscopy(TEM), double crystal X-ray diffraction(DCXD), photolumin escence(PL) spectroscopy and Raman spectroscopy. PL. Raman and DCXD results show that the GaAs epilayer grown by two step growth method has best crystallinites. Because of the high temperature growth in two step growth method has an annealing effect upon the inital prelayer and the Ge buffer layer, resulting in the suppressed dislocatin initation.

民族主義的 側面에서 본 韓國文學 : 日帝治下의 文學을 中心으로 Especially during the Japanese Rule of Korea

梁重海,金時泰,金永和 제주대학교 1973 논문집 Vol.5 No.-

How national consciousness is reflected in Korean literature during the Japanese rule of Korea can be a matter of our concern, partly because national consciousness and nationalism embedded in literary works were one of our issues of that period, and partly because it is significant to fathom the historical import of such literature and explain its present implications. In this article, main Colonial literary works with deep layers of national consciousness and nationalism in them are looked into in three separate genres:(1) poetry, (2) fiction, (3) criticism. In poetry, national self-esteem and resistance to Japanese imperialism were urged suggestively and metaphorically in the form of expressions peculiar to poetry. In fiction, the first phase of the resistance characterized by negative enlightenment eventually grew into the phase of positive, though suggestive, manifestation and description of the spirit of resistance. In literary criticism, first, most critics analyzed the discord and friction between nationalism and socialism by inquiring into the process through which these two ideologies were introduced into literature and by surveying the scope of literary theories based on the two ideas. Secondly, they tried to find the historical import and the sphere of nationalistic literary theories by analyzing the reflection of such theories in Korean society described in literary works, and by analyzing the contribution of such theories to the formation of spiritual structure of Korean literature. Such literature tells us that literature can not be separated from realities of the times and that it abstracts and reorganizes the notions of the age. In that respect, we can assert that the Koreans under the Japanese rule criticized, denied, and resisted the Colonial age instead of accepting it tolerantly.

구순구개열 환아에서의 치조골이식

조해성,박재홍,김광철,최성철,이긍호,최영철 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.1

치조파열 및 구개열과 같은 선천성 기형은 이환된 환자에게 기능적, 심미적으로 많은 문제점을 야기하므로 정상으로 회복시켜 주는 것은 중요한 문제이다. 장기간 방치될 경우 영양장애, 구강위생 불량, 호흡기 간염, 언어 장애, 악안면 변형, 그리고 정신적인 문제 등이 복합적으로 발생할 수 있다. 따라서 구순구개열 환자의 치료는 여러 전문 치료 분야의 복합적인 접근이 필요하다. 골이식은 구순구개열 환자에 있어 중요한 치과치료 단계이다. 치아의 맹출과 치열의 안정화를 위해 치열궁은 골격손이 없이 완전해져야 한다. 또한 치열궁의 파열이 있는 부위로는 정상적인 교정적 치아이동이 곤란하다. 따라서 구순구개열 환자에 있어 골이식은 광범위하게 적용되고 있는 외과적 술식이다. 치조골을 이식함으로써 치조열은 안정화되고, 견치 또는 절치가 이식부위로 이동할 수 있게 된다. 그리고 골 이식 후, 교정을 통해 치조열 부위의 공간을 폐쇄함으로써 보철 치료 없이 치열을 재형성할 수 있다. 골이식술에는 다양한 이식재료가 사용되었다. 자가골을 이식할 경우 장골이 가장 선호되며, 그 밖에 경골, 늑골, 두개골, 하악골을 이용하기도 한다. 그리고 골이식은 골이식 시기에 따라 일차골이식, 조기 이차골이식, 이차골이식, 만기 이차골이식으로 구분할 수 있다. 이차골이식은 혼합치열기 말경에 시행되는 것을 말하며 가장 좋은 것으로 받아들여지고 있다. 영구 견치가 맹출되기 전에 이차골이식을 시행하면 인접치아의 맹출과 보존에 도움이 된다. 본 증례에서는 치조구개파열 환자의 장골에서 골을 채취하여 골 이식을 시행한 후, 골이 채워진 이식 부위에 인접 치아가 성공적으로 이동하거나 치축이 개선되고 교정치료를 통해 치열궁 배열의 만족스러운 결과를 얻었기에 이를 보고하는 바이다 Cleft lip and palate are congenital craniofacial malformation. Reconstruction of dental arch in patient with alveolo-palatal clefts is very important, because they have many problems in functions and esthetics. Malnutrition, poor oral hygiene, respiratory infections, speech malfunctions, maxillofacial deformity, and psychological problems may be occured without proper treatment during the long period of management of the cleft lip and palate. So the treatment should be managed with a multidisciplinary approach. Bone grafting is a consequential step in the dental rehabilitation of the cleft lip and palate patient. A complete alveolar arch should be achieved of the teeth to erupt in and to form a stable dentition. And the presence of the cleft complicate the orthodontic treatment. Therefore bone grafting in patients with cleft lip and palate is a widely adopted surgical procedure. Grafted bone stabilizes the alveolar process and allows the canine or incisor to move into the graft site. After the bone grafting, orthodontic closure of the maxillary arch has become a common practice for achieving dental reconstruction without any prosthodontic treatment. Various grafting materials have been used in alveolar clefts. Iliac bone is most widely fovoured, but tibia, rib, cranial bone, mandible have also been used. And according to its time of occurrence, the bone graft may be divided into primary, early secondary, secondary, late secondary. Bone grafting is called secondary when performed later, at the end of the mixed dentition. It is the most accepted procedure and has become part of treatment of protocol. A secondary bone graft is performed preferably before the eruption of the permanent canine in order to provide adequate periodontal support for the eruption and preservation of the teeth adjacent to the cleft. In this report, we report here on a patient with unilateral cleft lip and palate, who underwent iliac bone graft. The cleft was fully obliterated by grafted bone in the region of the alveolar process. The presence of bone permitted physiologic tooth movement and the orthodontic movement of adjacent tooth into the former cleft area. Satisfactory arch alignment could be achieved in by subsequent orthodontic treatment.

접착용 레진을 이용한 유치의 직접 치수복조술에 관한 연구

조해성,최영철 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.2

오랜 기간동안 다양한 약제를 통한 직접 치수복조술이 시도되어 왔다. 그 중 가장 보편적으로 사용된 약제는 수산화칼슘이다. 하지만 유치에서 수산화칼슘을 이용한 직접 치수복조술의 성공률은 생활치수절단술에 비해 낮다고 보고 되어 왔다. 수산화칼슘의 단점으로 인해 다른 치수복조제를 찾기 위한 많은 연구가 있었으며 최근 여러 연구가들은 치수복조제로 접착용 레진의 이용을 제안하였다. 그들은 노출된 치수에 접착용 레진이 적용되었을 때 임상적 증상이 없이 염증이나 치수괴사가 없다고 주장하였다. 이 연구의 목적은 유치에서 기계적으로 노출된 생활치수에 치수복조제로써 수산화칼슘과 접착용 레진을 적용하여 단 기간 동안의 예후를 비교해 보고, 또한 각각의 직접 치수복조술을 시행한 유치에 있어 생리적인 치근흡수 유무에 따른 예후의 차이를 비교해보기 위함이다. 와동형성 중 기계적으로 치수가 노출되어 생활 치수인 유치 41개를 대상으로 하였다. 그중 접착용 레진으로 치수복조제로 사용한 치아 21개를 1군으로 하였고, 수산화칼슘을 이용한 치아 20개를 2군으로 하였다. 그리고 제 1군과 2군의 치아들은 치근단방사선 소견을 통해 생리적인 치근흡수의 유무여부에 따라 다시 세분되었다. 모든 치아는 복합 레진으로 수복하였으며, 시술 4개월 후 타진반응, 냉 검사, 전기치수검사 등의 치수 생활력검사와 치근단방사선 소견으로 성공여부를 판단하였다. 결과는 다음과 같다. 1. 1군과 2군 사이의 성공률에는 유의한 차이가 없었다. 2. 각 군에서 생리적인 치근흡수가 없는 유치보다 있는 유치에서 성공률이 현저히 높았다. 3. 전치와 구치사이의 성공률에는 유의한 차이가 없었다. A direct pulp capping with different medicaments has been attempted for a long time. The most commonly used among those is the calcium hydroxide. In primary teeth, however, a success rate of direct pulp capping with calcium hydroxide has been reported to be lower than that of puplotomy. The disappointing results of calcium hydroxide have prompted the search for other capping materials. Lately, several researchers suggested an application of adhesive resin-based composite systems as a capping material. They claimed that when an exposed vital pulp is capped directly with bonding resin, the pulp tissue is free of inflammation or necrosis without clinical symptoms. The aim of this study was to compare short-term effects of the bonding resin which was applied on the mechanically exposed vital pulp tissue and those of direct pulp capping with calcium hydroxide. The second objective was to compare success rates of the primary teeth which already underwent physiologic root resorption and those of the teeth which had not undergone physiologic root resorption yet. in each capping material groups. The vital, healthy pulp of forty-one primary teeth were exposed mechanically during a cavity preparation. They were divided into two groups: Group 1(n=21) underwent capping with bonding resin, and group 2(n=20) underwent capping with calcium hydroxide. Then these two groups were subdivided into two groups in each: the teeth which show physiologic root resorption and the teeth without root resorption. All of the sample teeth were restored with composite resin. Clinical evaluations such as percussion test, ice test, EPT, were recorded and also before- and after- standard x-ray films were compared and evaluated to decide whether the case was successful or not. Evaluation was performed at least 3 months after the capping materials. The results were as follows: 1. There was no difference in success rate between group 1 and group 2. 2. Success rate of the teeth with physiologic root resorption was higher than that of the teeth without physiologic root resorption in group 1 and group 2. 3. There was no difference in success rate between anterior teeth and posterior teeth.

영어의 완료상(The Perfect aspect)에 관한 연구

최해영 서경대학교 1995 論文集 Vol.23 No.1

This study aims to analyse the individual meanings of the perfect aspect and the relevant implication of it in terms of the context by comparing the definitions of various scholars on aspect, although grmmarians are not in agreement about them. This study has led to the conclusion that the individual meanings of the perfect aspect are the result, the continuation, the experience and the completion. The perfect aspect is one of the two most outstanding English aspectual system. It has also proven that the perfect aspect has much to do with the potential implication by means of the contextual situations. The simple past tends to replace the perfect aspect in American English. The British English prefers the present perfect to the American English. The individual meanings of the present perfect are influenced by the occurrence of the adverbial. The visual sensationm and linguisitc intuition play an important role in the choice of the simple past and the present perfect. I am contending that the perfect aspect has the four basic meanings in most cases of the situation and the current relevance to the past situations. But I hope a better study will be done hereafter.

영어 수동문의 의미에 관한 연구

최해영 서경대학교 인문과학연구소 1999 人文科學硏究 Vol.7 No.-

牧草의 混播가 分蘗數 및 葡蔔枝數에 미치는 影響

丁海鎭,정규관,朴永道 東亞大學校生命資源科學大學附設 農業資源硏究所 1994 農業生命資援硏究 Vol.3 No.1

牧草의 混播가 植生變化에 미치는 影響을 究明하고자 禾本科牧草를 5個 草種 6品種과 荳科牧草 2個 草種 4品種을 供試하여 5㎝×5㎝ 栽植거리로서 人爲的으로 混播集團을 形成, 栽培하여 分蘗數 및 葡萄枝數를 調査한 結果 다음과 같다. 1. 各 草種別 分蘗數는 perennial ryegrass(CV. Antrim, Rathlin)가 가장 많았고, hybrid ryegrass(CV. Augusta), meadow fescue(CV. S. 215), tall fescue(CV. Dovey), cocksfoot(CV. Cambria) 順으로 減少되었으며, 荳科牧草는 white clover(CV. S. 184, Donna)가 red clover(CV. Astra, Deben)보다 높게 나타났다. 2. 荳科牧草는 半直立型이며 잎이 좁거나 짧고 分蘗力이 中間程度인 cocksfoot, meadow fescue와 같은 禾本科牧草와의 混播에서 生育과 收量이 良好하였다. 3. 荳科의 越冬率이 높았던 混播組合에서는 葡萄枝數가 增大되고 荳科比率이 높아져서 總收量이 增大되었다. With a purpose to investigate the effects of grass-clover mixtures on herbage yield and sward composition, a set of sward canopy of grass-clover mixtures with d density of 5㎝×5㎝ was established with six cultivars of grasses and two cultivars of legumes. The number of tillers of stolons per plant and sward composition of mixtures was compared with that of single stand. The number of tillers per plant was highest in perennial ryegrass(CV. Antrim, Rathlin), followed by hybrid ryegrass(CV. Augusta), meadow fescue(CV. S. 215), tall fescue(CV. Dovey), and cocksfoot(CV. Cambria). When the legumes were combined with the grasses which have semierect plant type bearing narrow and short leaves with a medium tillering capacity, the dry matter yield of the mixtures increased significantly. Higher wintering rate in grass-clover mixtures resulted in an increase of stolones, higher compositions of legumes in the mixture, and consequently higher herbage yield.