• 제목/요약/키워드: Cold-formed

검색결과 559건 처리시간 0.032초

러시아-우크라이나 전쟁과 국제질서의 변화 (Russia-Ukraine War and a Change in the International Order)

  • 장세호
    • 분석과 대안
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    • 제6권2호
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    • pp.5-36
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    • 2022
  • 러시아-우크라이나 전쟁은 미국과 러시아, 러시아와 우크라이나, 우크라이나 정부군과 반군 간 '3층위 복합전'이다. 첫째, 동 전쟁은 자유주의국제질서를 유지·강화하려는 서구 세력권과 새로운 대안질서를 추구하는 중러 세력권이 지정학적 단층대인 우크라이나에서 충돌함으로써 발생한 현상이다. 둘째, 이번 전쟁은 나토의 지속적 확장과 러시아의 대응이라는 '연쇄 반응'(chain reaction) 게임에 의한 전형적인 '안보 딜레마' 현상의 결과이다. 셋째, 러-우 전쟁은 우크라이나의 돈바스에 대한 군사적 수복을 저지하기 위한 러시아의 군사력 투사로 인해 발생했다. 그동안 미국을 위시한 서구 세계는 러시아-우크라이나 전쟁 이후 예상 밖의 결속력을 보여주었다. 그러나 중국을 비롯한 비서구 세계가 러시아에 대한 규탄과 제재에 동참하지 않고 있어 눈길을 끈다. 이번 전쟁은 냉전 종식 이후 형성되어 작동하고 있는 현 국제질서의 존립과 변화 유무의 중요한 분기점이 될 것이다. 전쟁의 전개 양상과 종결 방식에 따라 현 국제질서의 유지·복원, 수정·변경, 종식·전환의 방향이 결정될 가능성이 크며, 대체로 그동안의 전황을 고려해볼 때 두 번째 방향으로 나아갈 가능성이 크다.

Correlation of the 2223 percentage before the first intermediate pressing and the transport property of the fully processed Bi-2223/Ag tapes

  • Jiang, C.H.;Yoo, J.M.;Ko, J.W.;Kim, Y.K.;Chung, H.S.
    • Progress in Superconductivity
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    • 제4권1호
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    • pp.94-98
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    • 2002
  • Two kinds of multifilament Bi-2223/Ag tapes, which are different in the precursor calcination temperatures, were heat treated for different time (12, 20, 30, 50, 70, or 100 h) firstly to obtain varied B2223 contents, and then followed by the same pressing and sintering cycles. The relation of the 2223 phase contents after the first sintering and the transport property of the fully processed tapes was studied. The results show that 75-80% 2223 phase formed in tapes before the first cold pressing is beneficial to get a high $I_{c}$ in the final tapes. Compensating the total heat treatment time of the tapes first sintered for 20 h to the same length as that first sintered for 50 h in the subsequent sintering stages, different $I_{c}$ enhancements were observed in these two tapes. No improvement on $I_{c}$ was found in the tape made from the powder calcined at higher temperature, whereas for the tape prepared with the lower temperature calcined powder, the $I_{c}$ was increased to the same level as that first sintered for 50 h. The 2223 contents before the intermediate mechanical work is related to the residual reactants, especially to the liquid phase, which is of vital importance to the phase conversion and healing microcracks, meanwhile, to the size and distribution of the non-superconducting secondary phases. The lower temperature calcined powder resulted in slow formation of 2223 phase, but also provided more reactants and liquid phase for the further phase conversion, as a consequence, for the Improvement of $I_{c}$. c/.

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Skull melting 방법에 의한 $YO_{1.5}-BaO-CuO$계의 방향적 결정성장 (Directional solidification by the skull melting in the $YO_{1.5}-BaO-CuO$ system)

  • 정용선
    • 한국결정성장학회지
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    • 제4권2호
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    • pp.148-156
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    • 1994
  • $YBa_2Cu_3O_X$상 부근의 3가지 조성을 skull melting 방법으로 4MHz에서 녹인 후 방향적 결정성장을 시켰다. 일반적인 무기재료 공정방법으로 처리된 분말을 skull에 넣은 후 $1200^{\circ}C$부근에서 용융시켰다. 사용한 성장속도는 4~0.25 cm/hr이었으며, 금속현미경, X-선 회절기, EDX 등을 이용해서 제조된 시편을 조사하여 사용한 분말의 조성에 따른 시편의 미세조직의 변화를 관찰하였다. $YBa_2Cu_7O_X$$YBa_5Cu_{11}O_X$ 시편의 대표적인 미세조직은 성장방향으로 자라난 침상형태의 $YBa_2Cu_3O_X$$Y_2BaCuO_5$ 상이 $CuO-BaCuO_2$의 공융 조직상 사이에 생성된 것으로 나타났다.

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Imperfections in thin-walled steel profiles with modified cross-sectional shapes - Current state of knowledge and preliminary studies

  • Aleksandra M. Pawlak;Tomasz A. Gorny;Michal Plust;Piotr Paczos;Jakub Kasprzak
    • Steel and Composite Structures
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    • 제52권3호
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    • pp.327-341
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    • 2024
  • This paper is the first in a series of articles dealing with the study and analysis of imperfections in thin-walled, cold-formed steel sections with modified cross-sectional shapes. A study was conducted, using 3D scanning techniques, to determine the most vulnerable geometric imperfections in the profiles. Based on a review of the literature, it has been determined that few researchers are studying thin-walled sections with modified cross-sectional shapes. Each additional bend in the section potentially generates geometric imperfections. Geometric imperfections significantly affect the resistance to loss of stability, which is crucial when analyzing thin-walled structures. In addition, the most critical locations along the length where these imperfections occur were determined. Based on the study, it was found that geometric imperfections cause a reduction in critical load. It should be noted that the tests performed are preliminary studies, based on which a program of further research will be developed. In addition, the article presents the current state of knowledge in the authors' field of interest. The future objective is to ascertain if these imperfections could potentially contribute positively to structural integrity. This enhanced understanding may pave the way for novel methodologies in structural engineering, wherein imperfections are viewed not solely as flaws but also as elements that could enhance the end product.

고려의 원시영역 유목초지, 그 부르칸(불함)이즘과 한국축산의 비전 (Burqanism from the Origin of the Pastoral Nomadic Koryo Region and the Vision of Korean Livestock Farming)

  • 주채혁
    • 한국초지조사료학회지
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    • 제25권1호
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    • pp.71-82
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    • 2005
  • Khori(高麗) refers to the Chaabog(reindeer) that live on lichens(蘚) on Mt. Soyon(鮮) in which pastures are the cold and dry plateau of North Eurasia. Thus, the origin region of the Khori or Koguryo that are the ancestors of the reindeer-herding pastoral nomads(馴鹿 遊牧民) can be said to be the Steppe-Taiga-Tundra pastoral areas of North Eurasia and North America. When the pastoral nomads moved on to the great mountain(大山) zone of the Jangbaek(長白) to the Baekdu(白頭) Mountains, they could have been in contact with pastoral farmers or agricultural farmers living there and they became the farmers remaining on agricultural farms. They were the Koryo people, the ancestors of Korea. Staying in one place, they gradually forgot the origin of their reindeer-herding pastoral nomadic history in the Northwest area of Mt. Soyon, the small mountain(小山) zone of the Steppe-Taiga-Tundra pastoral areas. In other words, they lost their identity as reindeer-herding pastoral nomads when they entered the agricultural area after leaving the pastoral area. However, since their basic genes had already formed when they lived on the cold and dry plateau of North Eurasia, it is possible to study their pastoral nomadic history focusing on 'the minority living in the broad area(廣域少數)', by utilizing highly advanced biotechnological science and focusing on genes and information technology innovation, and removing various past hindrances in research. Therefore, it is not so difficult to restore the reindeerherding pastoral nomadic history of the Koguryo(高句麗) people and secure their pastoral nomadic identity, of which the first steps have already been taken into their historical stages. The Eurasian continent and the Korean peninsula, especially the cold and dry plateau of North Eurasia and the Korean peninsula have been closely related to each other ecologically and historically. They can never be a separate space at all. The Eurasian continent lies horizontally east to west and thus, the continent forms an isothermal zone. Also, since the time of producing their own foods, it was relatively easy for people with their technology to move to other places owing to the pastoral nomadic characteristic of mobility. Unlike the Chungyen(中原) region, western Asia and the regions covering the Siberia-Manchu-Korean peninsula where food production revolution was first made were connected to the Mongolian lichens route(蘚苔之路: Ni, ukinii jam) and steppe roads. Although the ecological conditions of nature have changed a bit throughout a long history, it was natural for the many tribes in North Asia living on the largest Steppe-Taiga-Tundra area in the world to have believed 'the legends related to animals in relation to their founders and ancestors(獸祖傳說)'. Assuming that Siberian tigers and the tigers living on Mt. Baekdu were connected ecologically and genetically because of the ecological characteristics of the animals, and their migration from plateau to plateau, we would suspect that the Chosun(朝鮮) tribe living on Mt. Baekdu were ethnically and culturally more closely connected to the farther removed Ural-Altai tribes that lived on the cold and dry plateau region than to the Han(i14;) tribe who lived in Chungyen(中原) that was close to Mt. Baekdu. More evidence is the structure of the Korean language which has the form of 'Subject + Object + Verb', which is assumed to have originated from the speedy lifestyle of the reindeer-herding pastoral nomads. The structure is quite different from that of the Han(漢) language, which is based on agricultural life. Also, it is natural for reindeer riding reindeerherding pastoral nomads or horse-riding sheep-herding pastoral nomads(騎馬, 羊遊牧民) to have held military and political power over the region and eventually to have established an ancient pastoral nomadic empire in the process of their conquest of agricultural regions. The stages for founding global empires in the history of mankind maybe largely divided into two, in terms of ecological conditions and occupations. They are the steppes and the oceans. Of course, the steppe-based empires were established based on the skills to deal with horses and the ability to shoot arrows while riding horses, along with the use of iron ware in the 8th century BC. The steppe-based empires became the foundation for an oceanic empire, which could have been established by the use of warships and warship guns since the 15th Century. Based on those facts, we know that Chosun, Puyo(夫餘), and Koguryo are the products of a developmental process of pastoral nomadic empires on the steppes. Maybe we can easily find the pastoral nomadic identity of the Koguryo more than we expected when we trace the origins and history of the Korean tribe living in the pastures located in the northwest area of Mt. Jangbaek by focusing on pastoral nomadic mobility and organization just as we have investigated the historic origins of Anglo-Saxons in America by focusing on the times before the 15th Century. In the process, we should keep in mind that English culture originated from the Industrial Revolution and was directly delivered to the American continent, although America was far from England and was not an intermediate point on long sojourns either. Further, American culture came back to England in a more advanced form later. The most important thing currently to be resolved is to cause Koreans to look back on their own history in a freer way of thinking and with diverse, profound, and sharp insight, taking away the old and existing conventional recognition that is entangled with complicated interests with Korean people and other countries. The meanings of Chosun, Khori, and Solongos have been interpreted arbitrarily without any historic evidence by the scholars who followed conventional tradition of fixed-minded aristocrats in an agricultural society. If the Siberian cultural properties of the stone age, the earthenware age, the bronze age, and the iron age are analyzed in such a way, archaeological discovery will never be able to contribute to the restoration of the Koguryo's pastoral nomadic identity. One should transcend the errors that tend to interpret the cultural properties discovered in the pastoral nomadic regions as not being differentiated from those of agricultural regions and just interpret them altogether from the agricultural point of view. A more careful intention is required in the interpretation of cultural properties of ancient Korean empires that seem to have been formed due to mutual interactions of pastoral nomadic and agricultural cultures. Also, it is required that the conventional recognition chain of 'reverse-genes' be severed, which has placed more weight on agricultural properties than pastoral nomadic ones, since their settlement on agricultural farms was made after the establishment of their ancient pastoral nomadic empires. There is no reason at all to place priority on stoneware, earthenware, bronze ware, and iron ware than on wooden ware(木器) and other ware which were made of animal skins(皮器), bones and horns(骨角器), in analyzing the history in the regions of reindeer or sheep pastures. Reading ancient Korean history from the perspective of pastoral nomadic history, one feels strongly the instinctive emotions to return to the natural 'mother place'. The reindeer-herding pastoral nomadic identity of the Koguryo people that has been accumulated in volumes in their genes and hidden deep inside and have interacted organically could be reborn with Burqanism(Burqan refers to 不咸 in Chinese), which was their religion by birth and symbolized as the red willow(紅柳=不咸). The mother place of the Koguryo's people is the endless vast green pastures of North Eurasia and North America, where we anticipated the development of Korean livestock farming following the inherent properties in the genes of the reindeer-herding pastoral nomads with Korean ancestors. We anticipate that the place would be the core resource that could contribute to the development of life of living creatures following the inherent properties of their genes and biotechnological factors. In other words, biotechnology used for a search for clues on the well-being of humans could be the fruit brought by Burqanism of the Koguryo people and the fruit of the globalization of Korean livestock farming. It is the Chosun farmer in China come from the vast nomadic reindeer pastures of North Eurasia that resolved the food problem of a billion Chinese people with lowland paddy rice seeds (水稻) by transforming Heilongjiang Province(黑龍江省) into an oceanic lowland paddy rice field(水田). Even Mao Tse-tung(毛擇東) could not resolve the food problem by his revolution campaigns for tens of years. Today is the very time that requires the development of special livestock farming following the inherent properties of the ancient Korean reindeer-herding pastoral nomads that respected the dignity of life on the cold and dry plateau of North Eurasia and the America continent. I suggest that research should be started from the pastures of the Dariganga Steppe in East Mongolia that was the homeland of Hanwoo(韓牛) and the central horse-herding steppe place(牧馬場) of Chingis Khan's Mongolia. The Dariganga Steppe is awash with an affluent natural environment for pastoral nomadic living however, the quality of life of the pastoral nomads there is still low. I suggest we Koreans, the descendents of the Koguryo, should take our first steps for our livestock farming business project and develop the Northern nomadic pastures, here at the pastures of the Dariganga Steppe, which is the Mongolian core place of state-of-the-art technology for military weapons.

마늘의 흑색썩음균핵병에 대한 품종저항성의 역학적 평가 (Pathogenicity of Two Species of Sclerotium to Nine Cultivars of Garlic Cultivated Widely in Korea)

  • 김용기;권미경;조원대;김택수;심홍식;이용환;이찬중;이성찬
    • 식물병연구
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    • 제10권2호
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    • pp.105-111
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    • 2004
  • 마늘흑색썩음균핵병에 대한 국내재배 마늘의 품종저항성을 구명하기 위하여 발병에 관여하는 Sclerotium cepivorum과 대균핵을 형성하는 Sclerotium sp.에 대한 invitro clove inoculation법에 의한 균사생장과 균핵형성소요 일수 그리고 이병포장에서의 품종별 발병정도를 조사하였다. 마늘인편 절편상에서의 병원균의 생장과 균핵형성은 품종 또는 병원균간에 차이를 보였다. 대서종에서는 두 가지 병원균 모두 가장 높은 균사생장을 보였다. S. cepivorum과 Sclerotium sp.의 균핵은 고당종에서 가장 빠르게 형성되었고, 남도종에서 가장 늦게 형성되었다. 포장에서의 품종별 병 저항성에 있어서는 S. cepivorum에 대해서는 모든 마늘에서 이병주율이 50% 이상으로 시험 품종 모두 감수성인 것으로 판명되었으며, 난지형마늘에 비해 한지형마늘에서 발병이 적었다. Sclerotium sp.에 대해서는 난지형 마늘 모두 고도의 감수성이었고, 한지형마늘은 서산종, 단양종 그리고 예천종이 중도저항성이었으며 의성종은 저항성인 것으로 나타났다. 마늘의 품종저항성을 정량적으로 평가하기 위하여 병진전곡선을 1차 회귀직선화하여 얻은 초기발병치(intercept), 병진전속도 및 병진전곡선하면적(AUDPC)을 비교한 결과 초기발병과 병진전이 함께 고려된 AUDPC가 품종별 병저항성을 평가하는데 적당한 것으로 나타났다. In vitro 조건하에서의 균사생장 및 균핵형성과 포장에서의 역학지수(초기발병치, 최종발병치, 병진전속도, AUDPC)와의 상관관계를 조사한 결과, S. cepivorum에 대하여 균사생장과 최종발병치, 균사생장과 병진전속도간에는 정의상관을, 그리고 균핵형성과 역학지수간에는 부의 상관을 보였으나 5% 수준에서 유의성은 없었다.

여름 한국서남해역의 해양환경과 식물플랑크톤 군집분포 (Marine Environment and the Distribution of Phytoplankton Community in the Southwestern Sea of Korea in Summer 2005)

  • 윤양호;박종식;박영균;노일현
    • 한국해양환경ㆍ에너지학회지
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    • 제10권3호
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    • pp.155-166
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    • 2007
  • 이른 여름 동중국해 북부인 한국서남해역의 해양환경과 식물플랑크톤 군집 분포 양상을 파악하기 위한 현장조사를 2005년 6월 26일에서 28일까지 12개의 정점을 대상으로 실시하였다. 여름 한국서남해역은 표층에서 고온 저염 및 저온 고염의 한국 및 중국 연안수와 쓰시마난류 수괴특성을, 중, 저층에서는 저온 저염 및 고온 고염의 황해 저층냉수 및 대만난류 수괴 특성으로, 연안수, 대만난류 및 황해냉수 등 3개의 수괴에 영향을 받고 있는 것으로 나타났다. 표층의 수온전선은 한국 및 중국 연안수와 대만난류의 경계역에서, 수온 및 염분약층은 정점에 따라 다소 차이는 있지만 $10{\sim}20\;m$ 수층에 형성되었다. $Chl-{\alpha}$ 농도는 한국 연안수의 영향을 받는 해역에서 높고, 대만난류해역에서 낮았으나, 연직적으로 $Chl-{\alpha}$ 최대층은 수온약층보다 아래에 형성되었다. 표층과 수온약층의 식물플랑크톤 종조성은 26속 40종으로 단순하였으며, 우점종은 표층에서는 규조류인 Paralia sulcata 및 와편모조류인 Scripsiella trochoidea에 의해 점유되었으나, 수온약층에서는 규조류인 Skeletonema costatum과 Paralia sulcata에 의해 우점되었다. 현존량은 표층에서 5 cells/L에서 $3.8\;{\times}\;10^3\;cells/L$범위로 변화하여 매우 낮았다. 여름 한국서남해역의 식물플랑크톤 중 규조류는 저염의 연안수 영향을 받는 해역에서 높은 반면, 와편모조류는 고온의 대만난류해역에서 높게 출현하는 특성을 나타내어, 분류군에 의한 환경적응이 다르게 나타났다.

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이중 시야 중적외선 광학계 비열화·나르시서스 분석 (Athermalization and Narcissus Analysis of Mid-IR Dual-FOV IR Optics)

  • 정도환;이준호;정호;옥창민;박현우
    • 한국광학회지
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    • 제29권3호
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    • pp.110-118
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    • 2018
  • 항공용 전자 광학 타겟팅 시스템을 위한 중적외선 광학계를 설계하였다. 본 광학계는 이중 시야를 갖도록 설계되었으며, 빔 축소 전단 광학계, 줌 렌즈 그룹, 릴레이 렌즈 그룹, 콜드스탑 공액 광학계 및 냉각 적외선 검출기로 구성된다. 적외선 검출기는 단일 화소의 크기가 $15{\times}15{\mu}m$$1280{\times}1024$ 화소 배열을 가지며 잡음을 최소화하기 위하여, f/5.3의 냉각 콜드스탑이 적용된 제품으로 선정하였다. 이중 시야 ($1.50^{\circ}{\times}1.20^{\circ}$, $5.40^{\circ}{\times}4.23^{\circ}$)는 두 개의 렌즈를 삽입하는 방식으로 구현했으며, 줌 배율 변경 시 모든 시야에 걸쳐 f/5.3의 콜드스탑의 효율을 유지하도록 설계하였다. 열 효과가 이미지에 미치는 영향을 조사하기 위해 비열화 및 나르시서스 분석을 수행하였으며, 비열화 분석은 $-55{\sim}50^{\circ}C$의 작동 온도를 기준으로 초점 이동과 잔여 고차 파면 수차에 조사하였고 제르니케 다항식을 이용한 민감도 분석을 수행하여 최적의 보상자를 선정하였다. 선정된 보상자의 최적 이동을 고려한 MTF 해상력을 확인한 결과, 작동 온도 전 구간에 걸쳐 요구조건인 33 lp/mm에서 축상 10% 이상의 성능을 유지하는 것을 확인하였으며, 나르시서스 분석 결과, NITD (Narcissus Induced Temperature Difference) 값이 $1.5^{\circ}C$ 이하가 되도록 설계 된 것을 확인하였다.

이비인후, 안, 치아 및 피부증상의 민간요법에 관한 고찰 (Study on the Herb Remedies of ENT, Eyes, Teeth and Skin Problems)

  • 조결자;강현숙
    • 동서간호학연구지
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    • 제1권1호
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    • pp.50-71
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    • 1997
  • The intention of this study is to apprehend the con. tents and methods of herb remedies that are commonly conducted when there are health-problem cases of ENT, eyes, teeth and skin. Methods of this study are divided into two stages : 1) For a period of six months from December 1994 to June 1995, some 40 persons who are believed to be well versed with herb remedies have been randomly chosen, and we made a survey on herb remedies by symptoms: and 2) we have endeavored to make their grounds evident through the studies on literatures with the focus on the basic data collected. Their results are as follows: 1) When one feels a pain in ears, such herb remedies are employed as pouring the vapor into ears, which is made by steaming Alaska pollack, or as applying or wiping with the juices of radish or the ginkgo, or' alum. Applying the radish juice is effective for sterilization and fever removal: and applying the ginkgo juice is effective for cleanliness. But, plastering alum, sesame oil or castor oil, or pouring the vapor of Alaska pollack into ears are perhaps effective but do not have any pharmacologic grounds. 2) When one bleeds at the nose, such kinds of herb remedies are applied as stimulating nose or head with cold water, pressing nose or ridge of nose, or filling up nares with mashed mugworts. In addition, they have utilized garlic or leeks. Such methods as stimulating with cold water or just pressing nose and ridge of nose is based on reasonable grounds, i.e. vasoconstriction and vascular compression ; and applying mashed garlic on the sole of foot is good for the circulation of Qui ; and the use of mugworts and leeks is based upon the pharmacological function of hemostasis. 3) When one feels a sore throat such kinds of herb remedies are employed as gargling or rinsing throat with brine, drinking hot gruel or water, or drinking the juice of mugwort, radish, ginger or Chinese quince. Gargling with brine or drinking the juice of mugwort, radish or ginger is based upon the pharmacological function of pain alleviation, fever removal, and detoxication. 4) When a boil is formed in mouth, such herb remedies are applied as spreading honey, brine or alum water, and taking gall nut, Chinese matrimony vine, lotus root, etc, for drugs. Spreading honey, brine or water that is made by infusing gallnut, Chinese matrimony vine, lotus root is based upon such functions as hematosis, astriction, antibacterial, and antiphlogistic, Alum, eggplant and licorice are said to be effective, but their pharmacological effects have no grounds. 5) When one has conjunctivitis such herb remedies are commonly applied as irrigation with brine and dropping breast milk in eyes. Moreover, such other drugs are used as plantain. shepherd's purse, and purslane, etc. The use of brine, breast milk, plantain, shepherd's purse and purslane is based upon such functions as sterilization, antiphlogistic, disinfection and pain relieving. Eriocaulon sieboldianum, bean stem, bean pod and narcissus leaves are said to be effective, but their pharmacological action have no basis. When one has a stye, such herb remedies are applied as extracting eyelashes, stimulating by a massage of middle finger, third finger or big toe, as well as sear ing with a heated bamboo comb that is fine-toothed. Other than these, plantain and nightshade's nuts are used as drugs for it. Extracting eyelashes corresponds with exclusing suppurative node and draining the stye of pus ; and the use of plantain is based upon disinfection: and nightshade's nuts are said to be effective, however, their pharmacological action has no grounds. 6) For a treatment of toothache, such herb remedies are commonly employed as rinsing mouth with brine and holding cold water or gasoline in the mouth ; and as the drugs that are believed to be effective have been Welsh onion, ginger and castor-oil, plant, etc. The use of Welsh onion is based upon pain killing, antiinflammatory actions, and the use of ginger is based upon detoxication and disinfection ; and seeds of castor-oil plants are said to be effective, but they have no pharmacological basis. 7) When one has hives, such herb remedies are commonly applied as rubbing burned straw in affected parts, exposing to its smoke, rubbing with salt, sweeping down with a broom, and spreading and drinking boiled water of trifoliate orange. The use of cassia tora seeds, walnut, aloe and radish is said to be effective. The use of cassia tor a seeds has the functions of intestinal order, anti-paralysis, etc. The use of walnut has resulted in an increase of blood by invigorating spirits ; and the use of aloe is based upon disinfection, antibiotic, anti-salt, antihistamine and detoxication action. But, the effects of radish juice and straw's smoke have no pharmacological grounds. 8) When one gets a boil, such herb remedies are commonly used as applying a plaster, paste of flour mixed with yolk, soy sauce or honey, as well as spreading pounded elm tree. Other remedies that have been said to be effective are ; heating with mugwort, brine, wild rocambole, aloe, onion, squid's bone, etc. The use of mugwort is based upon pain killing, astringent antiinflammatory and tranquility. Wild rocambole is based upon the generation and maintenance functions of cell-joining textures ; elm tree upon antiphlogistic ; aloe upon fever removal and antiphlogistic ; onion on pain killing, fever removal, antiphlogistic and tranquility ; squid's bone on astriction: and brine or vinegar on sterilization. Pine resin and gardenia seed are said to be effective, but they have no pharmacological basis. 9) When one cuts his skin, such herb remedies are commonly employed as spreading mugwort's juice or squid's bone powder, or pressing the wounds. In addition, kalopanax, onion and fine soil are employed. The use of mugwort, kalopanax and squid's bone is based upon such functions as hemostasis, sedation, pain killing, antibacterial ; and fine soil is said to be effective, but it has no pharmacological basis. 10) When one suffers from whitlow, such herb remedies are commonly utilized as heating with boiled soy sauce, spreading soybean paste, or dipping into eggs, etc. Other drugs that have been employed are onion root, brine, eggplant, potato, loach, etc. The use of onion is based upon pain killing and antiphlogistic functions ; and that of brine upon antiphlogistic function. The use of soy sauce or soybean paste, fomentation, eggplant, potato and loach is said to be effective, but it has no pharmacblogic ground. 11) For the treatment of frostbite, such herb remedies are commonly used as dipping the affected part into frozen soybean sack, using boiled water of eggplant stem, garlic caulis, onion, hot pepper, caulis. Onion is based upon antiphlogistic and tranquility actions garlic upon disintection, metabolic exacerbation, tonic and aphrodisiac actions and the use of eggplant and hot pepper is based upon help blood circulation, dissolution and excretion of waste matters in vein. 12) For the treatment of burn, such herb remedies or drugs are commonly used as cleansing with Korean gin, spreading eggs, cleansing with cold water and soap water ; and as brine, cactus, moss, soybean paste, oil, etc. The cleansing with Korean gin, cold water, soap water, brine, vinegar is based upon cleaning and sterilizing functions ; and the use of cucumber is based upon nu. trition provision, and strengthening of resisting power by adjustment of metabolism. The use of potato, cactus, moss, oil and eggs is said to be effective, but their phamacological functions are not clarified. In view of the above results, we can realize that the drugs that have been employed in herb remedies are quite diverse. However, in regard to majority of herb remedies that have been employed by symptoms, the pharmacological functions of their drugs have not been clarified, and they are merely known as effective. Furthermore, they have not been recorded in the literature as yet ; and we confirm that there have been many herb remedies that were executed without the proper knowlege of their effects. It is now our view that the results of this survey may be utilized for consulting data in regard to the use of herb remedies.

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지관 플레이트가 주관에 용접된 각형강관 접합부의 설계내력 평가에 관한 연구 (Evaluation of Design Formulae for T-joints on the Branch Plate and Hollow Steel Sections welded connections)

  • 박금성;배규웅;문태섭
    • 한국강구조학회 논문집
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    • 제17권5호통권78호
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    • pp.581-591
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    • 2005
  • 본 논문의 목적은 지관이 종방향 플레이트인 냉간성형 각형강관 T형 접합부의 최대내력 평가를 통하여 설계내력식을 제안하는 것이다. 이러한 T형 접합부의 형상은 지관에 플레이트를 이용하여 각형강관 주관면에 길이방향으로 용접하는 형상이고, 지관 플레이트를 갖는 각형강관 T형 접합부 실험결과 중에서 주관 플랜지 휨파괴가 지배하는 접합부만을 대상으로 하였다. $16.7{\leq}2{\gamma}(B/T){\leq}31.3$ 이고 $0.20{\leq}{\beta}(b1/B){\leq}0.75$ 범위의 지관 플레이트를 갖는 T형 접합부에 대하여, 접합부의 내력은 강도보다는 사용성이 지배하는 나타나 최대내력을 주관폭(B)의 1.5 P1%B로 정의하였다. 기본 접합부 형상에 대해 제안된 항복선모델을 참조하여 지관 플레이트를 갖는 접합부 형상에 대한 새로운 수정된 항복선 모델을 제안하였다. 최종적으로 유한요소해석과 항복선 해석에 근거한 제안 설계내력식과 실험결과를 비교하여 타당성을 검증하였다.