Al-Zn-Mg-Cu-Zr 합금의 집합조직 발달과 기계적 특성에 미치는 Sc 첨가의 영향

제창웅,진승준,정동석,임성택,이용연,박노진 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.10

The texture and mechanical properties during fabrication processes - extrusion, cold rolling and aging treatment - of plate in the 7050 Al alloys without/with 0.1%Sc were investigated. In both the cross section(CS) and longitudinal section(LS) of the specimen without Sc, after cold rolling, texture of R-fiber was predominant. In the Sc added alloy after cold rolling, {112}<111>(Cu)+weak (123)<634>(S) texture components developed in the CS of the specimen while strong (3-fiber+(110)<001>(Goss) components developed in the LS of the specimen. After solution treatment and aging treatment, the alloy (CS and LS) without Sc had random texture, but by the alloys with the 0.1%Sc, the components of the rolling texture are not changed. After the aging treatment, hardness and tensile strength of the alloy with 0.1%Sc increased about 15% and 17%, respectively, than those without Sc. Tensile strength of the Sc added specimen was the highest along the rolling direction where the <111> texture was strongly developed. On the other hand, in the specimen without Sc, the mechanical properties were not dependent on the direction of the sample. (Received May 3, 2004)

초음파현미경에서 V(z)곡선의 시뮬레이션과 열화평가에의 응용

조동수,박익근,임재생,안형근,심우식,김홍준 한국비파괴검사학회 2004 학술대회 논문집 Vol.- No.-

선천성 완전방실차단이 동반된 신생아 루프스 1예

정재현,이은지,이은주,황진원,송영진,최병진,김일환,김종윤,허민영,김동욱 인제대학교 2009 仁濟醫學 Vol.30 No.-

Neonatal lupus is a rare syndrome occurring In neonates with tranplacentally acquired maternal autoantibodies, In particular anti-SSA/Ro-SSB/Ra antibodies. Manifestations include congenital heart block, cutaneous lesions, thrombocytopenia, neutropenia, pulmonary or neurological disease and hepatitis. The non-cardiac manifestations resolve by 6 months of age, congenital heart block is irreversible. We experienced a case of neonatal lupus with congenital complete heart block in a newborn of asyptomatic mother with anti-SSA/Ro-SSB/Ra antibodies.

記憶裝置의 分類와 認知的 端緖構造에 관한 硏究

申東魯,趙在國 全北大學校 1991 論文集 Vol.33 No.-

Recently the importance of mnemonic strategies in learning has been recognized. Through the use of special mnemonic devices, recall performance have been obtained. However, systematic research on mnemonic devices is now stating. This study is concerned with the follwing four aspects of the nature of mneminic devices : (1) Variables affect the formation and usage of mnemonic devices. (2) Educational application of mnemonic devices and it's possibility. (3) Classification model for mnemonic devices, and (4) The properties of cognitive cuing structures for mediating recall with mnemonic created by the user. The define clearly and specially what properties are necessary for the components of any mnemonic devices to operate successfully. The notion of a cognitive cuing structures whose components posess the properties of constructibility, discriminability, associability, and invertibility was offered as a first step in the development of a theory of mnemonic devices.

Ball Mill 분쇄에 對한 硏究

박동기,성일용,엄제현,김익수,김승혁 三陟大學校 1998 論文集 Vol.31 No.1

In the field of study on 'comminution' there appear some kinds of polarizition, i.e. macro-micro, software-hardware and practice-theory and so on. For instance, numerous papers are available on mathematical modelling or simulation of practical ball mill grinding circuits. Few discussion, however, has been made in those papers from the viewpoint of energy consumption on the basis of its quantitative measurement. On the other hand so-called 'fracture of a single particle' phenomena have been investigated exclusively from this point of view in other papers concerned. The authors, therefore, are trying to fill the gap of this type nad conducted so far some experimental work on a laboratory scale ball mill system facilitating precise measurements of torgue.

벼 담수골표면산파 재배의 파종방법 및 효과

황동용,박성태,김재현,양세준,김성만 한국국제농업개발학회 2002 韓國國際農業開發學會誌 Vol.14 No.4

담수골 표면산파시 안정입모 확보를 위한 파종 골거리와 깊이 및 파종전 후 물 관리 등에 따른 효과 및 주요 결과를 요약하면 다음과 같다. <적정 골거리 및 골깊이 구명> 1. ㎡당 입모수는 128-168개로 골 깊이 및 골거리에 관계없이 충분한 입모수가 확보되었고, 골내 입모율은 골거리 10㎝, 골깊이 8㎝에서 가장 높았고, 골 형성 정도는 골 거리 15㎝, 골 깊이 8㎝에서 비교적 양호하였다. 2. ㎡당수수는 각각 384∼428개로 처리간에는 뚜렷한 경향이 없었고, 수당립수는 76∼88개로 골거리가 깊을수록 적었고, 등숙율은 77.3∼84.6%로 골 거리간에는 차이가 없었으나 골 깊이간에는 깊을수록 높았다. 3. 담수골표면산파시 쌀 수량은 451∼534㎏/10a로 담수표면산파 448/㎏ 대비 1∼19% 증수되었고, 골 거리 15㎝, 골 깊이 8㎝에서 쌀 수량이 가장 높았다. 4. 담수골표면산파는 담수표면산파에 비해 줄기 매몰심이 깊고 포장 도복피해 정도는 골 깊이가 깊을수록 적었고 담수표면산파는 완전도복 되었다. <골형성후 파종상태 구명> 1. 골 형성정도는 양호하였으며, 종자몰림 및 부묘 정도는 거의 없었고, 골 내입모율은 68∼74%로 산파를 하였으나 어느 정도 조파형태로 입모 되었으며, ㎡당 입모수는 123개였음. 2. 줄기매몰심은 1.6∼2.2㎝로 깊게 매몰되었으며, 포장도복은 거의 없었으나 담수표면산파에서는 심한 도복현상을 보였다. 3. ㎡당수수 및 수당립수는 담수표면산파와 비슷하였으나 등숙율은 82%로 담수표면산파 77%보다 높았으며 쌀 수량은 515㎏/10a으로 담수표면산파 460/㎏ 대비 12% 증수되었다. 4. 농가 현지적응 3개지역 평균 ㎡당 입모수는 144개, 골내 입모율은 75.2%, 줄기 매몰심은 2.0㎝였고, ㎡당 수수는 373개로 기계이앙보다 11개가 많았고, 완전 미율 및 10a 당 백미 수량은 각각 95.8%, 578㎏으로 기계이앙과 비슷하였으며, 식미치는 77%로 기계이앙과 같았다. 5. 따라서 담수골표면산파시의 적정골거리 15㎝, 골깊이 8㎝로 제작된 작조기를 무논정지기에 부착하여 골형성후 파종작업을 했을 때 기존 담수표면산파보다 입모확보가 용이하고 새피해 및 도복피해 경감과 함께 안정 수량확보가 유리한 기술로 생각됨. This experiments was carried out to investigated cultivation effects of water wet furrow broadcasting seeding, a simple and cheap seeding furrow maker, which facilitates rice seeding and addresses lodging problem in water seeding rice was developed. The furrow maker with 432㎝ in length and 20㎝ in width was attached right after the rotary for furrow making. Before seed sowing , puddled soil is hardened for 4∼6 days and seeding furrow is prepared with the furrow maker and than the power duster is used to broadcast the pregerminated seeds. The water wet furrow broadcasting seeding was found to be stable in seedling stand by uniform seed sowing as well as in the reduction of seedling floating and high percentage of inner furrow seedling stand with 68∼74% by water wave movements : resulting to enhanced seedling furrow formation, wind pass, and light penetration. This method also ameliorates lodging problem by burying rice culm 1.6∼2.2㎝ deep as compared with conventional water seeding. Because of such factors, the milled rice yield was increased 1∼19% compared with conventional water seeding with 515㎏/10a.

行動目標의 理論的 背景과 效果的인 適用方案

申東魯,趙在國 全北大學校 學生生活硏究所 1990 學生生活硏究 Vol.18 No.-

This paper is aimed at reviewing the theoretical background of behavioral objective and listing the limitations of them on the basis of both my won teaching experience and reviewing literature in order to propose alternatives. To this purpose, some scholars' efforts and achievement will be reviewed, and then I will scrutinize the limitations of behavioral objectives for their field application. The application of behavioral objectives in the description of educational objectives was generalized and played a great role in designing instructional programs among teachers from the middle of 1960's to the early of 1970's. But it seems that some educators have begun to review the applied result of behavioral objectives and tried for the better development of behavioral objectives. Some educators tried to specify educational objectives in the early 1900's. It was Franklin Bobbitt who emphasized the importance of educational objectives for the first time in terms with behavioral objectives. Ralph Tyler contributed significantly to the development of educational objectives in 1950's. Benjamin Bloom and his colleagues argued operationalized theoretical assertions by classification of educational objectives in the cognitive domain, affective domain, and the psychomotor domain. Mager described the situation of behavior, the ordering procedural of acceptance, and now to describe objectives. Gagne´ contributed critically to the specification of behavioral objectives by proposing hierachical analysis through the analysis of learning task. But in 1980's there have been some arguments among cognitive theoreticians and humanists that behavioral objectives can not be applicable to all areas of instruction. They have argued that behavioral objectives have some limitations achieving integrative instructional aims and result in the poor situation of learning, and that they are inappropriate for affective area. Some educators have studied about the whole structure of knowledge, the indevidualization of students' learning abilities, the presentation of expressive objectives, general procedural objectives in affective domain. The process-oriented objectives is focused on learning process in order to make up for limitations of behavioral objectives. Educators should admit that behavioral objectives have played a great role in improving the quality of education and that they also have both advantages and limitations. Therefore, we educators should have our won judgement with regard to both advantages and limitations of behavioral objectives in curriculum construction so as to apply them appropriately. And also we had better pay attention to the learning process in curriculum construction by studing various methodologies.

6-치환된 1,3,5-trianzine-2,4-dithiol 유도체의 반응성 연구

김재종,이용희,성대동 동아대학교 기초과학연구소 2001 基礎科學硏究論文集 Vol.18 No.1

Several 6-substituted-1,3,5- triazine-2,4-dithiol derivatives were prepared and their infrared were recorded on KBr disk. All these compounds show distinctly separate absortion bands for C-S and C-N streching. Each of these bands is split into a doublet. This is explained in terms of the existence of rotational isomers.

위치 기반 서비스에서 미래 위치 검색을 위한 이동 객체 색인

서동민,복경수,유재수 충북대학교 컴퓨터정보통신 연구소 2004 컴퓨터정보통신연구 Vol.12 No.1

최근 위치 기반 기술에 대한 활용이 증가하면서 이동 객체를 효율적으로 관리하기 위한 색인 구조의 필요성이 증가하고 있다. 하지만, 기존에 제안된 색인 구조들은 이동 객체의 계속되는 위치 이동으로 빈번한 색인의 변경과 성능 저하 문제를 가진다. 본 논문에서는 미래 위치 검색 및 갱신 비용을 최소화하기 위한 새로운 시공간 색인 구조를 제안한다. 제안하는 색인 구조는 갱신 비용을 최소화하기 위해 이동 객체의 현재 위치를 직접 접근하기 위한 보조 색인 구조와 공간 분할 기반의 KDB-트리를 결합한 색인 구조이다. 제안하는 색인 구조에서는 이동 객체의 미래 위치 검색 및 갱신 비용을 줄이기 위해 KDB-트리의 중간 노드에 시간에 대한 파라미터를 유지한다. 또한 제안하는 색인 구조에서는 공간활용도 및 검색 효율을 극대화하기 위한 새로운 갱신 및 분할 기법을 제안한다. 제안하는 색인 구조의 우수성을 입증하기 위해 다양한 실험을 통해 성능 평가를 수행한다. Recently, with the rapid development of location-based techniques, index structures to efficiently manage moving objects have been required. Existing index structure frequently need updates because moving objects change continuatively its position. That caused entire performance loss of index structure. In this paper, we propose a new spatio-temporal index structure that supports a future position retrieval and minimizes a update cost. The proposed index structure combines an assistant index structure that directly accesses current positions of moving objects with KDB-tree that is a space partitioning access method. The internal node in our proposed index structure keeps time parameters in order to support the future position retrieval and to minimize a update cost. Moreover, we propose new update and split methods to maximize the space utilization and the search performance. We perform various experiments to show that our proposed index structure outperforms the existing index structure.

사람 태아간의 산호성 과립백혈구형성에서 산호성 과립형성에 대한 미세구조 연구

송재섭,김경용,이원복,김동창 중앙대학교 의과대학 의과학연구소 1992 中央醫大誌 Vol.17 No.4

The developmental processes of eosinophilic granule formation were ultrastructural investigation of eosinophilic granulopoiesis in 15 cases of human fetal livers from 8 to 34 weeks of gestation. 1) Numerous vesicles, microgranules and small agranular and granular vacuoles were distributed around the distended Golgi apparatus in myeloblast and eosinophilic promyelocyte. 2) Granular matrix of vacuoles contained small granular vacuoles, serveral vesicles and mutilamellar structures. The granular substance exhibited higher electron density than that of cystic rough endoplasmic reticulum(RER) and was similar partly to that of immature eosinophilic granules. 3) Distended cystic RER was fused to produce matrix of maturing granules with granular vacuoles and immature eosinophilic granules. 4) Immature eosinophilic granule which began to be produced in eosinophilic promyelocyte, had myelin sheath-like structure and debris of vesicles and granular vacuoles and those disappeared immediately. The charicteristic crystalloid inclusions began to develop in immature eosinophilic granule of myelocyte. In summary, it is suggested that vesicles and granular vacuoles as well as RER in the myelocyte and promyelcyte are participating in the formation of immature eosinophilic granules which become mature with the appearance of charicteristic crystalloid inclusion