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        Research Articles : Physiological characteristics of the Large Copper butterfly, Lycaena dispar (Lepidoptera: Lycaenidae)

        ( Seong Hyun Kim ),( Seong Jin Hong ),( Young Bo Lee ),( Hae Chul Park ),( Yeon Ho Je1 ),( Nam Jung Kim ) 한국잠사학회 2011 International Journal of Industrial Entomology Vol.23 No.2

        To establish an indoor-rearing system for the Large Copper butterfly, Lycaena dispar and the Small Copper butterfly, Lycaena phlaeas, the effect of temperature, photoperiod and host plants on larval development was investigated. The larvae of Lycaena dispar fed on Rumex crispus, whereas the larvae of Lycaena phlaeas ate both Rumex crispus and Rumex acetosa. The duration of the larval period of Lycaena dispar was 13.8 days on R. crispus and that, of Lycaena phlaeas was 15.9 days and 15.2 days on R. acetosa and R. crispus respectively. Laboratory experiments show that the Large Copper larvae are able to feed on other Rumex species without harming their overall survival and can utilize these alternative host plants at least as efficiently as their natural host plant. This result suggests that plant chemistry is not responsible for their lack of utilization of the alternative host plants in the wild. Host plant choice by ovipositing females was measured with the two alternative hosts. Lycaena dispar preferred R. crispus to R. acetosa, wheareas Lycaena phlaeas preferred R. acetosa to R. crispus. Temperature has been proposed as an important determinant of developmental rate, lifespan and mortality in invertebrates. As temperature increased, length of the developmental period gradually decreased. The developmental period of the Large Copper larvae was 11.0 days and 28.5 days at 30oC and 17.5oC, respectively.

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      • 분산 공유 메모리 시스템에서 거짓 공유를 줄이는 메모리 할당 기법

        조성제 단국대학교 1999 論文集 Vol.34 No.-

        Distributed Shared Memory(DSM) systems employ block migration and block replication approaches which take advantage of the locality of reference and concurrency. When one processor repeatedly reads a data item that another is regularly updating, those approaches suffer the block-bouncing effect, where blocks frequently move between competing processors. The problem can be further complicated if false sharing exists among processors. False sharing of a block occurs when two different data items, not shared but accessed by two different processes, are allocated to a shingle block. In write-invalidate protocols, false sharing can lead to unnecessary invalidations. In write-update protocols, when several writers falsely share data items they may cause them to be overwritten with older versions. So, false sharing is an important factor in degrading system performance. In case that shared data objects for parallel programs are dynamically allocated, we analyzed allocation and reference patterns of the shared objects in connection with false sharing. We also propose a new allocation scheme which can reduce a considerable amount of false sharing faults and evaluate the existing memory allocation techniques for reducing false sharing faults in DSM systems. Our allocation scheme reduces the number of false sharing faults with a little additional memory space.

      • 중증 재생불량성 빈혈 환자의 동종골수이식 후에 병발한 간정맥폐색질환(Hepatic Veno-Occlusive Disease)의 임상 경과 및 혈액응고 인자들의 변화

        이제환,이규형,최성준,민영주,김신,이정신,김상희,박찬정,지현숙,김우건 대한조혈모세포이식학회 1999 대한조혈모세포이식학회지 Vol.4 No.2

        연구배경: 재생불량성 빈혈 경우에는 조혈모세포 이식 후 VOD의 발생에 관한 보고가 거의 없는 실정이다. 저자 등은 cyclophosphamide와 antithymocyte globulin으로 전처치 후에 동종골수이식을 시행한 재생불량성 빈혈 환자들을 대상으로 하여 VOD의 발생과 임상 양상, 혈액응고 인자들의 변화에 관하여 분석하여 보았다. 방법: 재생불량성 빈혈로 동종골수이식을 시행 받은 13예 환자를 대상으로 하였다. 임상적 기준에 따라 VOD를 진단하였으며 임상 경과에 따라서 경중을 분류하였다. Protein C, protein S, antithrombin Ⅲ, tPA, PAI-1 등의 혈액응고 인자들을 전처치 투여전, 골수 주입당일, 이식 후 제7, 14, 21일에 측정하였다. 결과: 7예(53.8%)에서 VOD가 발생하였으며, 경증 5예, 중등도 2예였다. VOD군에서 혈소판치가 20.000/㎕ 이상을 유지하는 데까지 걸리는 시간이 더 길었다(p=0.026). 또한 VOD군에서 적혈구 및 혈소판의 수혈 요구량이 각각 유의하게 많았다(p=0.025, 0.015). 혈액응고 인자들의 변화를 보면, 제 0일에 VOD군에서 PAI-1의 혈중 농도가 유의하게 더 높았다.(p=0.034). 결론: 재생불량성 빈혈환자에서도 조혈모세포 이식 후에 VOD의 높은 발생률을 관찰하였으며, 대부분이 경증이었다. VOD 환자에서의 혈액응고 인자들의 변화는 PAL-1이 VOD의 감별 진단을 위하여 이용될 수 있음을 시사하고 있다. Background: There are few reports about the occurrence of hepatic veno-occlusive disease(VOD) after bone marrow transplantation (BMT) for severe aplastic anemia (SAA). We analyzed the incidence and clinical outcomes of VOD and changes of coagulation factors in patients with SAA who were conditioned with cyclophosphamide plus ATG and underwent allogeneic BMT. Methods: Thirteen patients with SAA who underwent allogeneic BMT were included. A diagnosis of VOD was made according to clinical criteria, and severity of VOD was classified according to clinical course. Plasma levels of protein C, protein S, antithrombin Ⅲ, t-PA, and PAI-1 were determined before preparative chemotherapy, in the day of marrow infusion, and days 7, 14, and 21. Results: VOD occurred in 7/13(53.8%). Five were mild VOD and two were moderate VOD. Time to platelet ≥20,000/L was slower (p=0.026) and red cell and platelet transfusion requirements were higher (p=0.025,0.015) in patients with VOD . The mean plasma level of PAI-1 at 0 were higher in patients with VOD (p=0.034). Conclusion: We observed the high incidence of VOD after allogeneic BMT in patients with SAA. A majority of cases of VOD were mild. The changes of PAI-1 after BMT may be useful marker of hepatic VOD

      • 微生物 有機質肥料의 施用이 토마토의 收量과 土壤環境에 미치는 影響

        金炅濟,金碩均 東國大學校 1999 東國論叢 Vol.38 No.-

        몇가지 土壤微生物劑 處理가 토마토의 收量과 土壤의 化學成分, 그리고 微生物相에 미치는 影響을 調査하였다. 모둔 微生物劑 處理區에서 無處理에 비하여 收量이 增加하는 傾向이 있었고, 특히 MPK+Compost 處理區가 가장 높았다. 土壤의 化學成分에서는 Tomi 處理區에서 K와 Mg의 含量이 높았으나, 다른 處理區에서는 差異가 없었다. 土壤의 微生物相을 調査한 結果, 總細菌數에서는 Tomi 處理區가 가장 높았고 Husk+Palma 및 MPK+Husk+Palma 處理區에서도 높게 나타났다. Bacillus는 MPK+Husk+Palma 處理區가 가장 높았고 Husk=Palma와 Tomi 處理區에서도 몹시 增加되었다. Actionmycetes와 fungi에서도 tomi 處理區가 매우 增加하였으나, 다른 處理區 間에는 差異가 없었고, pseudomonas에서도 却 處理間에 差異가 없었다. This study was carried out to investigate the effect of microbial fertilizers on yields of tomato. Six microbial fertilizers, MPK+Husk+Palma, Husk+Palma, MPK+Compost, Compost, Bio livestock cattle system (BLCS) cattle dropping, and Tomi, were used. All of the microbial fertilizers were tend to increase yields of tomato, especially MPK+Compost treatment was most effective. In a chemical components of soil, concentrations of K, Mg were increased with Tomi treatment, however, the other concentrations of soil chemical components were not different. In a microbial floras of soil, Tomi, Husk+Palma, and MPK+Husk+Palma treated plots increased in numbers of total bacteria and bacillus. Tomi treated plot increased in numbers of actinornycetes and fungi, also. The other microbial floras of soil were not different, however. The microbial fertilizers may affect the useful microbial floras, therefore, it would be increase yeld of tomato treated with them.

      • 분산 공유 메모리 시스템에서의 페이지 교체 정책

        조성제 단국대학교 1998 論文集 Vol.33 No.-

        Distributed Shared Memory(DSM) systems employ page migration and page replication approaches which take advantage of the locality of reference and concurrency. Under a DSM system where shared pages can be replicated on several nodes, it can happen that a page must be evicted from memory to make room for a newly requested page. When this situation occurs, two subproblems immediately arise: which page to evict and where to put it. Also, because high speed network technology facilitates efficient transmission of dta between computers, a process can benefit from data residing in the memory of other computers. The drastic improvement in network performance has brought about a remote caching architecture that processors attempt to evict a page to memory of remote sites before attempting to evict the page to local disk. To study paging behavior of parallel applications on distributed systems, the paper evaluates the performance of page replacement algorithms such as LRU, LRU2, FIFO, and LFU. The experimental results show that LRU appears to be a good replacement policy for parallel programs. For fft program, LRU2 which evicts the least­recently used page out of replicated pages shows maximal reduction in page fault rate.

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