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Lkhagvasuren, Davaa,Ansorge, Hermann,Samiya, Ravchig,Schafberg, Renate,Stubbe, Anne,Stubbe, Michael The National Institute of Biological Resources 2013 Journal of species research Vol.2 No.1
Based on 440 skulls recently collected from two areas of the wild ass population in Mongolia, the time course of tooth eruption and replacement was investigated. The dentition pattern allows identification of age up to five years. We also conclude that annual lines in the tooth cementum can be used to determine the age in years for wild asses older than five years after longitudinal tooth sections were made with a low-speed precision saw. The first upper incisor proved to be most suitable for age determination, although the starting time of cement deposition is different between the labial and lingual sides of the tooth. The accurate age of the wild ass can be determined from the number of annual lines and the time before the first formation of the cementum at the respective side of the tooth.
Nondestructive damage evaluation of deep beams
Dincal, Selcuk,Stubbs, Norris Techno-Press 2017 Structural monitoring and maintenance Vol.4 No.3
This paper presents a Level III damage evaluation methodology, which simultaneously, identifies the location, the extent, and the severity of stiffness damage in deep beams. Deep beams are structural elements with relatively high aspect (depth-to-length) ratios whose response are no longer based on the simplified Euler-Bernoulli theory. The proposed methodology is developed on the bases of the force-displacement relations of the Timoshenko beam theory and the concept of invariant stress resultants, which states that the net internal force existing at any cross-section of the beam is not affected by the inflicted damage, provided that the external loadings in the undamaged and damaged beams are identical. Irrespective of the aspect ratios, local changes in both the flexural and the shear stiffnesses of beam-type structures may be detected using the approach presented in this paper.
Feminist engagement with restorative justice
KATHLEEN DALY,JULIE STUBBS 東國大學校 比較法文化硏究所 2007 比較法硏究 Vol.8 No.1
회복적 사법을 통한 여권신장방안은 5가지 영역으로 고찰하고자 한다. 이는 사법정의이론, 형사사법상 응보주의의 역할, 회복적 사법 절차에 있어서 성에 관한 연구, 배우자·성범죄·가정폭력피해자를 위한 회복적 사법의 적정성, 사법상 인종과 성차별에 관한 대책이 그것이다. 여성을 위한 사법정책은 주로 성범죄나 피해자, 그리고 가정폭력에 중점을 두고 연구해왔던 것이 사실이나, 그 초점을 좀 더 확대할 필요가 있다. 우리는 회복적 사법에 관한 여성주의적 분석을 위해 이론적, 정치적, 실증적인 문제들을 고찰할 것이다.
공정데이터를 이용한 PECVD공정의 Fault Localization
이혜민,홍경진,Shallon Stubbs,장원혁 대한산업공학회 2013 대한산업공학회 추계학술대회논문집 Vol.2013 No.11
본 논문에서는 Display제조공정의 Low Temperature Poly Silicon(LTPS)단계에서 Plasma enhanced chemical vapor deposition(PECVD)공정과 결정불량의 상관관계를 살펴보고, PECVD공정 내 결정불량의 유발인자들의 발생 메커니즘을 알아보고자 한다. 설명변수로 PECVD의 공정 데이터를 이용하였으며, 시뮬레이션 방법은 progressive principal component analysis(progressive PCA)와 Squared prediction error(SPE) time series그래프를 사용하였다. 이 시뮬레이션 방법은 각 변수들의 단변량적인 통계분석을 넘어서 변수들간의 교호작용까지 고려한 다변량 통계 방법으로서 공정 이상을 정확히 예측하고, 분석하여 공정관리 효율과 공정능력을 높이는데 도움이 된다. 본 논문에서는 결정불량 발생에 영향을 주는 PECVD공정의 변수들을 찾아 내고, T²와 SPE time series그래프를 통해 변수들의 이상거동 시점을 파악하였다. 그리고 PECVD기인성 결정불량의 발생시나리오를 예측하였다. 본 알고리즘은 PECVD공정과 결정불량의 상관관계를 밝히는 것 이외에도 제조공정의 다른 설비 또는 단위공정에 적용될 수 있다. 이는 다양한 불량들의 원인인자를 찾고 공정과의 상관관계를 분석하는데 도움을 줄 것으로 예상한다.
Nondestructive damage detection in structures using changes in compliance
Choi, Sanghyun,Park, Sooyong,Stubbs, Norris Elsevier 2005 International journal of solids and structures Vol.42 No.15
<P><B>Abstract</B></P><P>A methodology to identify damage in a structure is presented in this paper. The method utilizes a new form of damage index based on the changes in the distribution of the compliance of the structure due to damage. The changes in the compliance distribution are obtained using the mode shapes of the pre-damaged and the post-damaged state of the structure. The validity of the method is demonstrated using numerically generated data from beam structures and experimental data from a free–free beam structure with inflicted damage. In the numerical and experimental examples, the damage identification performance of the proposed method is compared with that of the existing strain-energy-based method. The results of the numerical and experimental studies indicate that the proposed compliance-based damage index method can be used in damage identification of the structure.</P>
Damage Detection in Jacket-Type Offshore Structures From Few Mode Shapes
Jeong-Tae Kim(김정태),Norris Stubbs(노리스 스텁스) 한국해양공학회 1994 韓國海洋工學會誌 Vol.8 No.1
An algorithm to locate and estimate severity of damage in jacket-type offshore structures for which modal responses are available for very few vibrational modes is presented. First, a theory of damage locaization and severity estimation(which yields information on the location and severity of damage directly from changes in mode shapes) is formulated. Next, the feasibility the damage detection algorithm is demonstrated by using a numerical example of an offshore jacket platform for which only three vibration modes are measured. Form the material presented here, two major results are observed. First, all damage locations in the offshore jacket platform are correctly predicted. Next, predicted damage is relatively correctly estimated.
Improved parameter identification using additional spectral information
Nam, Dongho,Choi, Sanghyun,Park, Sooyong,Stubbs, Norris Elsevier 2005 International journal of solids and structures Vol.42 No.18
<P><B>Abstract</B></P><P>Spectral information such as natural frequencies from a frequency response function has been widely utilized in structural parameter identification problems. Recently the use of other information in the frequency response function, e.g., antiresonant frequencies, is getting attention. This paper presents application of additional spectral information such as antiresonant frequencies and static compliance dominant frequencies to structural parameter identification problems. The existing sensitivity-based system identification technique is extended by adopting the antiresonant frequencies and the static compliance dominant frequencies, and the performance of the approach using additional spectral information is compared with the approach using only natural frequencies via a numerical example of a mechanical system. The results of the numerical study indicate that the use of additional spectral information improves the accuracy in parameter identification.</P>