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    • 특정 데이터셋 온톨로지 기반 폭행 감지를 위한 LSTM 영상 주석

      Marshall Kyungsung University, Graduate School. 2021 국내석사

      RANK : 2863

      컴퓨터 비전은 사진 또는 동영상의 시각적 정보를 높은 수준으로 이해할 수 있도록 하는 다원적인 연구분야이다. 이 과정은 정보를 일반적 또는 풍부하게 추출하고 추출된 정보를 추론하기 위한 다양한 기법과 방법을 포함한다. 지난 10년간 발전의 큰 도약으로, 딥러닝은 컴퓨터 비전 분야에서 많이 연구되고 있다. 컴퓨터 비전과 딥러닝의 응용 프로그램 중 하나는 다양한 응용 프로그램으로 확장되는 지능형 감시입니다. 지능형 감시에는 보안 시스템, 인적 활동 인식, 교통 관리 및 법 집행 시스템을 포함할 수 있지만 이에 국한되지는 않다. 보안에 중점을 두고 특정 제한 지역 주변의 이물질 탐지, 수배범 식별 또는 비정상적인 활동 감지와 같은 다양한 형태의 범죄 예방이 적용될 수 있다. 비정상적 활동 감지는 일반적으로 학문적 규율에 속하는 정상적인 / 비정상적인 패턴의 존재를 인식하기 위해 심층 학습 구조를 필요로 한다. 패턴의 특이를 인식하기 위해 개발된 접근법이 많지만, 본 논문에서 제안 된 이상 탐지 시스템의 중추로서 딥러닝 기반 이미지 캡션을 사용한다. 제안된 접근 방식은 이미지 캡션 생성(2장)과 그 구현에 초점을 맞추고 있으며, 이를 유능한 모니터링 시스템으로서의 기능을 보여준다. 제 3장에서는 제안된 접근 방식은 특징 벡터가 주어진 단어 임베딩에 장단기 메모리(LSTM) 레이어를 사용한다. 또한, 제안된 접근법은 매우 인기 있는 단어 내장 사전인 GloVe 색인 방법을 사용한다. 제 4장은 특정 환경에서 발생할 수 있는 폭력 활동을 탐지하기 위해 개발된 프로토타입을 검토한다. 결과 캡션이 로우패스 필터와 임계값을 통과하여 경보를 알린다. Computer vision is a multidisciplinary field of study that attempts to enable a high-level understanding of visual information in the form of digital images or videos by computers. The process generally involves the usage of various techniques and manipulation to extract information, generally or richly, and make an inference out of the extracted information. With a great leap of development in the past decade, deep learning has been gaining more popularity in the study of computer vision. One of the real-world applications of computer vision and deep learning is intelligent surveillance which branches out to many different applications. Some of these might include but are not limited to, security systems, human activity recognition, traffic management, and law enforcement system. Under the security focus of its application, various forms of crime prevention can be applied such as detection of foreign bodies around certain restricted areas, identification of wanted criminals, or abnormal activity detection. Abnormal activity detection commonly requires a deep learning architecture to recognize the presence of abnormal/unusual patterns which falls under its academic discipline. While there are many approaches developed to recognize the outlier in the pattern, this manuscript uses deep-learning-based image captioning as the backbone of the proposed anomaly detection system. The proposed approach focuses on image caption generation (Chapter 2) and its implementation to show its function as a capable monitoring system. In Chapter 3, the proposed approach uses the Long-Short-Term Memory (LSTM) layer for word embedding given a feature vector. Also, the proposed approach makes use of the GloVe indexing method which is a highly popular word embedding dictionary. Chapter 4 reviews the developed prototype to detect probable violent activities in a given environment. The resulting caption is passed through a low-pass filter and threshold to trigger the alarm.

    • Response of Deep Foundations to Seismic Loads in Alabama

      Kane, Kevin Marshall Auburn University ProQuest Dissertations & Theses 2013 해외박사(DDOD)

      RANK : 2845

      Deep foundations are commonly used as foundation elements for bridges in Alabama. Due to the implementation of the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications, design of critical and essential bridges will be significantly impacted for the moderate seismic design category of Alabama.Five bridge case studies were provided by the Alabama Department of Transportation (ALDOT) to evaluate the response of typical foundations used for critical and essential bridges. FB-Multi Pier, a program that couples nonlinear structural finite element analysis with nonlinear static soil models, was used to model both the soil and structure (both foundation elements and substructure components) of each case history. These models were loaded with a suite of scaled time-history events to simulate an earthquake. Displacement at the top of the pier and ground surface was recorded, as well as maximum shear force, bending moment, and demand/capacity (D/C) ratio distribution along the length of the driven pile, drilled shaft, or column. The maximum shear force, bending moment, and D/C ratio distributions indicated where the plastic hinge zones could be expected to form in the structure. FB-Multi Pier was also used to develop a family of foundation response curves that were used in SAP2000 to evaluate the performance of the case histories.Pile performance under combined scour and earthquake was reviewed and two different scour depth models were developed for one case history. Buckling criteria for foundations in soft clay or liquefiable soil were also reviewed and compared to two case histories.It was found that scour depth appears to affect the dynamic response of the bridge pier. The pier modeled with 25% scour depth performed worse (structurally) than the same pier modeled with 100% scour depth. This was due to large displacements at the ground surface and large bending moments developing below the ground surface. The pier founded in soft clay over rock performed poorly due to structural failure in the foundations. This was due to flexure failure of the piles. It was also found that drilled shafts embedded in shallow bedrock tend to perform well depending on the natural frequency and structural period of the pier. Recommendations for further research address soil susceptibility to scour and liquefaction, full-scale dynamic load testing, and correlations between the natural and structural period of a bridge pier and its performance during an earthquake event.

    • The taxonomy, phylogeny and biogeography of the neotropical genus, Verres Kaup (Coleoptera: Passalidae, Proculini)

      Marshall, Christopher J Cornell University 2000 해외박사(DDOD)

      RANK : 2623

      A taxonomic revision of <italic>Verres</italic> Kaup was conducted. Nine of the 26 species-level names published under <italic>Verres </italic> (including: <italic>Neoverres</italic> Hincks and <italic>Platyverres </italic> Bates), are considered valid. The invalid names consist of 2 <italic> nomina nuda</italic>, 1 unnecessary replacement name, and 14 junior synonyms (5 of which are newly proposed). Three new species are described, raising the complement of valid species to 12: <italic>cavicollis</italic> Bates, <italic> corticicola</italic> Truqui, <italic>deficiens</italic> Kuwert, <italic>furcilabris </italic> (Eschscholtz), <italic>hageni</italic> Kaup, <italic>intermedius </italic> Kaup, <italic>longicornis</italic> (Luederwaldt), <italic>onorei </italic> Boucher and Pardo Locarno, <italic>sternbergianus</italic> Zang, <italic> achoros</italic> Marshall, n. sp., <italic>arion</italic> Marshall, n. sp., and <italic>gilloglyi</italic> Marshall, n. sp. A comprehensive review of passalid beetle morphology, including detailed illustrations of adult and larval external anatomy, was accomplished. The morphological findings are compared to past anatomical work of Passalidae, other scarabaeoid taxa, and Coleoptera in general. A cladistic analysis was conducted of the 12 valid species of <italic> Verres</italic> based on 27 morphological characters of adults and larvae. Exemplar species from <italic>Veturius</italic> Kaup, <italic>Publius</italic> Kaup and <italic>Proculus</italic> Kaup, three closely related proculine genera, were used as outgroups. The analysis produced a single most parsimonious cladogram (length 59, CI 58 and RI 77) that supports the monophyly of <italic>Verres </italic>. The results also support the conclusion that brachyptery (reduced flight wings) has evolved twice in the genus: once in the Mexican species, <italic> V. intermedius</italic> Kaup and once in a clade of species from southern Central America, related to <italic>V. longicornis</italic> (Luederwaldt). Areas of endemism were defined using multiple criteria, including geography, elevation and forest type. Cladistic biogeographic methods were employed to infer the most parsimonious area relationships. The results support the notion that <italic>Verres</italic> has both older Central American components, as well as more recent radiations. Additionally, the results indicate that the Talamancan cordillera is a complex zone with affinities to northwestern South America as well as to nuclear Central America. A biogeographic prediction is made that the newly described species, <italic>V. achoros</italic> Marshall, n. sp., for which no locality information is known, is natively distributed in the eastern Talamancan Cordillera.

    • The Bleaching Carceral: Police, Native and Location in Nairobi, 1844-1906

      Marshall, Yannick Columbia University ProQuest Dissertations & These 2017 해외박사(DDOD)

      RANK : 2607

      The Bleaching Carceral: Police, Native and Location in Nairobi, 1844-1906 Yannick Marshall This dissertation provides a history of the white supremacist police-state in Nairobi beginning with the excursions of European-led caravans and ending with the institutionalizing of the municipal entity known as the township of Nairobi. It argues that the town was not an entity in which white supremacist and colonial violence occurred but that it was itself an effect white supremacy. It presents the invasion of whiteness into the Nairobi region as an invasion of a new type of power: white supremacist police power. Police power is reflected in the flogging of indigenous peoples by explorers, settlers and administrators and the emergence of new institutions including the constabulary, the caravan, the "native location" and the punitive expedition. It traces the transformation of the figure of the indigenous other as "hostile native," "raw native," "native," "criminal-African" and finally "African." The presence of whiteness, the things of whiteness, and bodies racialized as white in this settler-colonial society were corrosive and destructive elements to indigenous life and were foundational to the construction of the first open-air prison in the East African Hinterland.

    • Confidentiality intervention: Effects on collaboration

      Marshall, Tina Bogart University of Pennsylvania 2000 해외박사(DDOD)

      RANK : 2591

      Research indicates that providing information about mental illness and involving families in the treatment process leads to improved outcomes for persons with severe mental illness (consumers). The goal of the dissertation research was to examine whether confidentiality policies, which specify procedures for releasing information to families, enhance consumer-provider-family collaboration. This question was approached in two ways: first, by examining how confidentiality policies regarding the release of information to families by providers were interpreted and implemented; and second, by examining the effectiveness of a provider intervention that clarifies confidentiality policies. Using a quasi-experimental design, the intervention was introduced into one agency and compared with a second agency that received no intervention. The effectiveness of the intervention was assessed by measuring collaboration as reported by 58 families and 52 providers. As expected, differences were found between providers regarding who initiated the consent process, the types of information that are confidential, and how confidentiality policies were implemented. Similarly, inconsistencies were found among families in their understanding of who should initiate the consent process, the types of information that require consent, and whether their consumer relative was asked for their permission (verbally or in writing) to release information to them. These inconsistencies were found to be barriers to collaboration, thus providing additional support for an intervention similar to the one tested. Although low provider fidelity limited the extent to which the effectiveness of the intervention could be assessed, a pattern of significance was found within the family sample. Families associated with providers that had higher fidelity scores were significantly more likely to receive more information, a greater array of information, and were more likely to be satisfied with provider contact. Although the findings did not reach significance for the provider sample, providers with higher fidelity scores were also more likely to have increased contact with families. While the findings are not definitive, the results suggest that the model intervention is an essential first step in enhancing collaboration. Further research of the effectiveness of the intervention is needed. Low fidelity of the intervention has implications for intervention research and the implementation of clinical guidelines.

    • On the cohomology and quantum chaos of the general linear group in two variables

      Marshall, Simon Princeton University 2010 해외박사(DDOD)

      RANK : 2591

      The subject of this thesis is the cohomology and quantum unique ergodicity of various arithmetic manifolds arising from quaternion algebras over a number field. Our first main theorem bounds the number of cohomological forms of fixed level and growing weight when the associated locally symmetric space is a hyperbolic 3-manifold. To state it in a special case, let Gamma ⊂ SL(2, C ) be a congruence lattice and Ed the restriction of the representation Symd ⊗ Symd of SL(2, C ) to Gamma. Classes in H1(Gamma, Ed) correspond to cohomological forms on Gamma\ SL(2, C ), and we are able to improve the trivial bound dim H 1(Gamma, Ed) << d 2 for the dimension of these groups by a power to << d2-delta. Our proof involves choosing an auxiliary prime p and applying a theorem of Calegari and Emerton on Fp cohomology growth in the level aspect, which we transfer to the weight aspect by a reduction mod p argument. We also prove that cohomological forms on a quaternion algebra over any number field must have the same weights as a form base changed from a totally real subfield. Our first result on QUE deals with Hecke-Maass eigenforms of large eigenvalue on arithmetic quotients of SL(2, C ). We construct representation theoretic microlocal lifts for every element of the unitary dual of SL(2, C ) following Silberman and Venkatesh, and show that QUE for these lifts is implied by a subconvex bound for a triple product L-function. Our second main theorem establishes QUE for cohomological forms on GL2 over an arbitrary number field. Assuming Ramanujan, we show that the mass of cohomological forms of fixed level and growing weight becomes equidistributed, generalising work of Holowinsky and Soundararajan. In particular, our theorem is unconditional over totally real and imaginary quadratic fields. We use Holowinsky and Soundararajan's methods, applying Soundararajan's weak subconvexity to certain triple product L-functions, and adapting Holowinsky's sieve method to the more complicated structure of the cusp in the presence of units. In the totally real case, our result implies that the zero divisors of holomorphic Hecke eigenforms of large weight become equidistributed, generalising a result of Rudnick.

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