• 제목/요약/키워드: vector migration

검색결과 48건 처리시간 0.019초

Enhancement of VECTOR Method by Adapting OCTAVE for Risk Analysis in Legacy System Migration

  • Hakemi, Aida;Jeong, Seung Ryul;Ghani, Imran;Sanaei, Mojtaba Ghanaatpisheh
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제8권6호
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    • pp.2118-2138
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    • 2014
  • Risks are involved in all phases of the software life cycle, and due to these risks, software can face various problems that can cause different negative outcomes and sometimes, in extreme cases, the failure of the software. Most of these risks lie in the legacy software migration process. These risks can create many problems, and in the worst case they can lead to the failure of the migration project. This paper explores different types of risk analysis methods such as CRAMM, CORAS, OCTAVE and VECTOR. After comparing these methods, the two suitable methods were chosen, namely, OCTAVE and VECTOR. Based on the use of these two methods, the project suggests an enhanced EOV method for risk analysis in the migration of legacy software.

Sub-surface imaging and vector precision from high resolution down-hole TEM logging

  • Chull, James;Massie, Duncan
    • 한국지구물리탐사학회:학술대회논문집
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    • 한국지구물리탐사학회 2005년도 제7회 특별심포지움 논문집
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    • pp.11-18
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    • 2005
  • Filament inversion routines are highly effective for target definition whenever total-field DHTEM vectors can be obtained using three-component logging tools. However most cross-hole components contain significant noise related to sensor design and errors in observation of probe rotation. Standard stacking methods can be used to improve data quality but additional statistical methods based on cross-correlation and spatial averaging of orthogonal components may be required to ensure a consistent vector migration path. Apart from assisting with spatial averaging, multiple filaments generated for successive time-windows can provide additional imaging information relating to target geometry and current migration. New digital receiver systems provide additional time-windows to provide better tracking options necessary for high-resolution imaging of this type.

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Influence of Curcumin on HOTAIR-Mediated Migration of Human Renal Cell Carcinoma Cells

  • Pei, Chang-Song;Wu, Hong-Yan;Fan, Fan-Tian;Wu, Yi;Shen, Cun-Si;Pan, Li-Qun
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권10호
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    • pp.4239-4243
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    • 2014
  • Background: This study investigated the influence of curcumin on HOX transcript antisense RNA (HOTAIR)-mediated migration of cultured renal cell carcinoma (RCC) cells. Materials and Methods: Five RCC cell lines (769-P, 769-P-vector, 769-P-HOTAIR, 786-0, and Kert-3 ) were maintained in vitro. The expression of HOTAIR mRNA was determined by quantitative real-time PCR and cell migration was measured by transwell migration assay. The effects of different concentrations of curcumin (0 to $80{\mu}mol/L$) on cell proliferation was determined by the CCK-8 assay and influence of non-toxic levels (0 to $10{\mu}M$) on the migration of RCC cells was also determined. Results: Comparison of the 5 cell lines indicated a correlation between HOTAIR mRNA expression and cell migration. In particular, the migration of 769-P-HOTAIR cells was significantly higher than that of 769-P-vector cells. Curcumin at $2.5-10{\mu}M$ had no evident toxicity against RCC cells, but inhibited cell migration in a concentration-dependent manner. Conclusions: HOTAIR expression is correlated with the migration of RCC cells, and HOTAIR may be involved in the curcumin-induced inhibition of RCC metastasis.

포인팅 벡터를 이용한 역시간 구조보정 (Reverse-time migration using the Poynting vector)

  • 윤광진
    • 지구물리와물리탐사
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    • 제9권1호
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    • pp.102-107
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    • 2006
  • 최근 급속히 발전하는 하드웨어로 인해 역시간 구조보정을 다양한 현장자료의 영상화에 적용할 수 있게 되었다. 양방향 파동방정식을 이용하는 파동방정식 구조보정 방법으로, 역시간 구조보정은 다중 도달파 뿐 아니라 급경사 및 수직 이상의 경사를 갖는 반사면도 영상화가 가능하다. 그러나 쌍곡선 파동방정식의 양방향 전파라는 성질로 인해 역시간 구조보정은 잡음을 발생시킨다. 연속적으로 입사각이 증가하여 지표로 전파되는 파, 선두 파, 역 산란 파 등과의 영 지연 상호상관은 의사영상을 만든다. 이러한 큰 진폭의 의사영상은, 상호상관되는 각 점에서 볼 때, 순 전파 및 역전파되는 두 파동장들이 거의 정 반대방향으로 전파한다는 공통점을 갖고 있다. 이는 순 전파하는 파동장과 역 전파하는 파동장의 두 전파경로가 거의 일치함으로써 발생한다. 본 논문에서는 음원 모음 역시간 구조보정에서의 의사영상을 제거하는 몇 가지 시도들을 소개하고자 한다. 구조보정 전에 실시하는 음원모음자료의 간단한 뮤팅 또는 초동 주시 이후의 시간 창 이내에서만 상호상관을 실시하는 파면 구조보정은 이러한 의사영상을 제거하는데 효과적이다. 포인팅벡터로부터 계산한 파동방정식의 전파방향을 이용하면 큰 진폭의 의상영상을 제거할 수 있는 새로운 영상화 조건을 적용할 수 있고 반사각에 따른 공통영상모음을 구할 수 있다.

Early Growth Response Protein-1 Involves in Transforming Growth factor-β1 Induced Epithelial-Mesenchymal Transition and Inhibits Migration of Non-Small-Cell Lung Cancer Cells

  • Shan, Li-Na;Song, Yong-Gui;Su, Dan;Liu, Ya-Li;Shi, Xian-Bao;Lu, Si-Jing
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권9호
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    • pp.4137-4142
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    • 2015
  • The zinc finger transcription factor EGR 1 has a role in controlling synaptic plasticity, wound repair, female reproductive capacity, inflammation, growth control, apoptosis and tumor progression. Recent studies mainly focused on its role in growth control and apoptosis, however, little is known about its role in epithelial-mesenchymal transition (EMT). Here, we aim to explore whether EGR 1 is involved in TGF-${\beta}1$-induced EMT in non-smallcell lung cancer cells. Transforming growth factor (TGF)-${\beta}1$ was utilized to induce EMT in this study. Western blotting, RT-PCR, and transwell chambers were used to identify phenotype changes. Western blotting was also used to observe changes of the expression of EGR 1. The lentivirus-mediated EGR 1 vector was used to increase EGR 1 expression. We investigated the change of migration to evaluate the effect of EGR 1 on non-small-cell lung cancer cells migration by transwell chambers. After stimulating with TGF-${\beta}1$, almost all A549 cells and Luca 1 cells (Non-small-cell lung cancer primary cells) changed to mesenchymal phenotype and acquired more migration capabilities. These cells also had lower EGR 1 protein expression. Overexpression of EGR 1 gene with EGR 1 vector could decrease tumor cell migration capabilities significantly after adding TGF-${\beta}1$. These data s howed an important role of EGR 1 in the EMT of non-small-cell lung cancer cells, as well as migration.

해저설치형 음향도플러유향유속계를 이용한 음향산란층의 연직이동속도 측정 (Measurement of vertical migration speed of Sound Scattering Layer using an bottom mooring type Acoustic Doppler Current Profiler)

  • 조현정;이경훈
    • 수산해양기술연구
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    • 제46권4호
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    • pp.449-457
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    • 2010
  • This study shows that the vertical migration speed of sound scattering layers (SSLs), which is distributed in near Funka Bay, were measured by 3D velocity components acquired from a bottom moorng ADCP. While the bottom mooring type has a problem to measure the velocity vectors of sound scattering layer distributed near to surface, both the continuous vertical migration patterns and variability of backscatterers were routinely investigated as well. In addition, the velocity vectors were compared with the vertical migration velocity estimated from echograms of Mean Volume Backscattering Strength, and estimated to produce observational bias due to SSLs which is composed of backscatterers such as euphausiids, nekton, and fishes have swimming ability.

면심입방구조에서 Electro-Migration-Induced Breakdown에 대한 전위파이프 확산의 영향 (The Effect of Dislocation Pipe Diffusion on Electro-Migration-Induced Breakdown in an FCC Structure)

  • 이득용
    • 한국세라믹학회지
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    • 제28권11호
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    • pp.878-884
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    • 1991
  • The mobility and diffusivity in an edge dislocation in an FCC crystal formed by the removal of one half of a (100) plane were evaluated in an applied field by analyzing a vacancy tight binding model using Stark's matrix technique. A model of an edge dislocation in an FCC crystal was constructed for a [100] Burgers vector where vacancy transport along the edge dislocation in an FCC crystal was constructed for a [100] Burgers vector where vacancy transport along the edge of the extrac half plane of ions was considered. The model considered a tight binding approximation of the vacancy to the compressed region of the core and carried the calculation to the limit of an infinite length of dislocation. The diffusivity and the ratio of mobility to diffusivity were found to increase without bounds in the limit where the correlation factor becomes zero. In contrast, as the correlation factor became unity, the diffusivity became zero and the ratio of mobility to diffusivity became unity associated with the uncorrelated limit of 1/kT. This implied that the phenomenon was not unique to the crystal structure but was unique to edge dislocations with vacancy tight binding.

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지역 간 인구이동, 경지면적, 외국인 근로자의 관계 분석 (Interrelationship Between Regional Population Migration, Crop Area, and Foreign Workers)

  • 조서진;윤희연
    • 지역연구
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    • 제40권2호
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    • pp.21-38
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    • 2024
  • 지역 인구와 경지면적 간의 상호작용을 이해하는 것은 지역 경제 활성화와 농업의 지속가능성 향상을 위해 중요하다. 기존의 연구들은 지역의 인구이동이나 경지면적 변화 각각의 주제에 중점을 두었으며, 이들의 상호작용에 관한 연구는 미흡했다. 또한, 새로운 노동 공급원인 외국인 근로자의 증가를 대상으로 한 지역 단위의 정량적 연구도 부족했다. 이에 본 연구에서는 지역의 인구 변화, 경지면적, 그리고 외국인 근로자 수 변화의 상호작용을 패널 자기 상관 모형(Panel Vector Auto Regression Model)을 활용하여 분석하였다. 분석 결과, 지역의 인구유입률과 경지면적은 서로에게 부정적인 영향을 발생시키지만, 농업부문의 외국인 근로자 증가는 경지면적을 증가시키는 것으로 나타났다. 또한, 밭 면적의 증가는 외국인 근로자를 증가시키는 것으로 나타났다. 이러한 결과는 지역의 인구감소와 경지면적 감소 현상이 상호영향을 미치고 있으며 외국인 근로자의 유입이 농촌지역의 구조적 문제해결에 긍정적인 영향을 미칠 가능성이 있음을 시사한다.

GPU를 이용한 이방성 탄성 거꿀 참반사 보정의 계산가속 (Acceleration of Anisotropic Elastic Reverse-time Migration with GPUs)

  • 최형욱;설순지;변중무
    • 지구물리와물리탐사
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    • 제18권2호
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    • pp.74-84
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    • 2015
  • 탄성 거꿀 참반사 보정(elastic reverse-time migration)을 통해 물리적으로 의미가 있는 영상을 얻기 위해서는 탄성 파동방정식(elastic wave equation)을 통해 재구성된 벡터 파동장(reconstructed vector wavefield)으로부터 P파와 S파를 분리하는 파분리 알고리듬이 필요하다. 그리고 이방성을 고려한 탄성 거꿀 참반사 보정으로의 확장을 위해서는 이방성을 고려한 탄성 모델링 알고리듬 뿐만 아니라 이방성을 고려한 파분리가 필요하다. 이방성 탄성매질에서의 파분리는 등방성 탄성매질에서 주로 이용하는 Helmholtz decomposition과는 달리 탄성매질의 수직 속도 및 이방성 계수에 따라 계산된 유사미분필터(pseudo-derivative filter)를 이용한다. 이 필터는 적용에 많은 계산이 필요하기 때문에 이 연구를 통해 많은 양의 병렬계산을 효율적으로 수행할 수 있는 GPU (Graphic Processing Unit)를 이용하여 이방성 파분리를 수행하는 알고리듬을 개발하였다. 또한 GPU를 이용해 파분리를 수행하는 알고리듬을 포함하고 MPI (Message-Passing Interface)를 이용하는 효율성 높은 이방성 탄성 거꿀 참반사 보정 알고리듬을 개발하였다. 개발된 알고리듬의 검증을 위해 Marmousi-II 탄성모델을 기초로 수직 횡등방성(vertically transversely isotropy; VTI) 탄성모델을 구축하여 수치모형 실험을 수행해 다성분 합성탄성파탐사자료를 생성하였다. 이 합성탄성파 자료에 개발된 이방성 탄성 거꿀 참반사 보정 알고리듬을 적용하여 GPU와 MPI를 효과적으로 이용한 계산속도 향상과 이방성 파분리에 의한 영상결과의 정확도 향상을 보여주었다.

Antimicrobial peptide scolopendrasin VII, derived from the centipede Scolopendra subspinipes mutilans, stimulates macrophage chemotaxis via formyl peptide receptor 1

  • Park, Yoo Jung;Lee, Ha Young;Jung, Young Su;Park, Joon Seong;Hwang, Jae Sam;Bae, Yoe-Sik
    • BMB Reports
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    • 제48권8호
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    • pp.479-484
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    • 2015
  • In this study, we report that one of the antimicrobial peptides scolopendrasin VII, derived from Scolopendra subspinipes mutilans, stimulates actin polymerization and the subsequent chemotactic migration of macrophages through the activation of ERK and protein kinase B (Akt) activity. The scolopendrasin VII-induced chemotactic migration of macrophages is inhibited by the formyl peptide receptor 1 (FPR1) antagonist cyclosporine H. We also found that scolopendrasin VII stimulate the chemotactic migration of FPR1-transfected RBL-2H3 cells, but not that of vector-transfected cells; moreover, scolopendrasin VII directly binds to FPR1. Our findings therefore suggest that the antimicrobial peptide scolopendrasin VII, derived from Scolopendra subspinipes mutilans, stimulates macrophages, resulting in chemotactic migration via FPR1 signaling, and the peptide can be useful in the study of FPR1-related biological responses. [BMB Reports 2015; 48(8): 479-484]