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Artykuły w czasopismach na temat "CONEX framework"

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Fang, Zheng, i Juwon Seo. "A Projection Framework for Testing Shape Restrictions That Form Convex Cones". Econometrica 89, nr 5 (2021): 2439–58. http://dx.doi.org/10.3982/ecta17764.

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This paper develops a uniformly valid and asymptotically nonconservative test based on projection for a class of shape restrictions. The key insight we exploit is that these restrictions form convex cones, a simple and yet elegant structure that has been barely harnessed in the literature. Based on a monotonicity property afforded by such a geometric structure, we construct a bootstrap procedure that, unlike many studies in nonstandard settings, dispenses with estimation of local parameter spaces, and the critical values are obtained in a way as simple as computing the test statistic. Moreover, by appealing to strong approximations, our framework accommodates nonparametric regression models as well as distributional/density‐related and structural settings. Since the test entails a tuning parameter (due to the nonstandard nature of the problem), we propose a data‐driven choice and prove its validity. Monte Carlo simulations confirm that our test works well.
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Wiecek, Margaret M. "Advances in Cone-Based Preference Modeling for Decision Making with Multiple Criteria". Decision Making in Manufacturing and Services 1, nr 2 (11.10.2007): 153–73. http://dx.doi.org/10.7494/dmms.2007.1.2.153.

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Decision making with multiple criteria requires preferences elicited from the decision maker to determine a solution set. Models of preferences, that follow upon the concept of nondominated solutions introduced by Yu (1974), are presented and compared within a unified framework of cones. Polyhedral and nonpolyhedral, convex and nonconvex, translated, and variable cones are used to model different types of preferences. Common mathematical properties of the preferences are discussed. The impact of using these preferences in decision making is emphasized.
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Kojima, Masakazu, Sunyoung Kim i Hayato Waki. "A GENERAL FRAMEWORK FOR CONVEX RELAXATION OF POLYNOMIAL OPTIMIZATION PROBLEMS OVER CONES". Journal of the Operations Research Society of Japan 46, nr 2 (2003): 125–44. http://dx.doi.org/10.15807/jorsj.46.125.

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Ohta, Tomoyuki, Tatsuki Yamazaki, Shinnosuke Murakami, Ryoichi Mukai i Yoshiaki Kakuda. "Evaluation framework for simulating MANET-based systems". IEICE Communications Express 10, nr 7 (1.07.2021): 404–8. http://dx.doi.org/10.1587/comex.2021xbl0089.

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Lewkowicz, Izchak. "Convex invertible cones of matrices — a unified framework for the equations of Sylvester, Lyapunov and Riccati". Linear Algebra and its Applications 286, nr 1-3 (styczeń 1999): 107–33. http://dx.doi.org/10.1016/s0024-3795(98)10164-7.

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Taenaka, Yuzo, i Kazuya Tsukamoto. "An efficient traffic management framework for multi-channel wireless backbone networks". IEICE Communications Express 3, nr 3 (2014): 98–103. http://dx.doi.org/10.1587/comex.3.98.

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Rashid, Saima, Humaira Kalsoom, Zakia Hammouch, Rehana Ashraf, Dumitru Baleanu i Yu-Ming Chu. "New Multi-Parametrized Estimates Having pth-Order Differentiability in Fractional Calculus for Predominating ℏ-Convex Functions in Hilbert Space". Symmetry 12, nr 2 (2.02.2020): 222. http://dx.doi.org/10.3390/sym12020222.

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In Hilbert space, we develop a novel framework to study for two new classes of convex function depending on arbitrary non-negative function, which is called a predominating ℏ-convex function and predominating quasiconvex function, with respect to η , are presented. To ensure the symmetry of data segmentation and with the discussion of special cases, it is shown that these classes capture other classes of η -convex functions, η -quasiconvex functions, strongly ℏ-convex functions of higher-order and strongly quasiconvex functions of a higher order, etc. Meanwhile, an auxiliary result is proved in the sense of κ -fractional integral operator to generate novel variants related to the Hermite–Hadamard type for p t h -order differentiability. It is hoped that this research study will open new doors for in-depth investigation in convexity theory frameworks of a varying nature.
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Saha, Sourav, Sahibjot Kaur, Jayanta Basak i Priya Ranjan Sinha Mahapatra. "A Computer Vision Framework for Automated Shape Retrieval". American Journal of Advanced Computing 1, nr 1 (1.01.2020): 1–15. http://dx.doi.org/10.15864/ajac.1108.

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With the increasing number of images generated every day, textual annotation of images for image mining becomes impractical and inefficient. Thus, computer vision based image retrieval has received considerable interest in recent years. One of the fundamental characteristics of any image representation of an object is its shape which plays a vital role to recognize the object at primitive level. Keeping this view as the primary motivational focus, we propose a shape descriptive frame work using a multilevel tree structured representation called Hierarchical Convex Polygonal Decomposition (HCPD). Such a frame work explores different degrees of convexity of an object’s contour-segments in the course of its construction. The convex and non-convex segments of an object’s contour are discovered at every level of the HCPD-tree generation by repetitive convex-polygonal approximation of contour segments. We have also presented a novel shape-string-encoding scheme for representing the HCPD-tree which allows us touse the popular concept of string-edit distance to compute shape similarity score between two objects. The proposed framework when deployed for similar shape retrieval task demonstrates reasonably good performance in comparison with other popular shape-retrieval algorithms.
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Mondal, Sourav, Goutam Das i Elaine Wong. "An Analytical Cost-Optimal Cloudlet Placement Framework over Fiber-Wireless Networks with Quasi-Convex Latency Constraint". Electronics 8, nr 4 (5.04.2019): 404. http://dx.doi.org/10.3390/electronics8040404.

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To meet the low-latency constraints arising from future smart mobile devices, Internet-of-Things, and 5G applications, major interest is currently given to the integration of centralized cloud computing and distributed edge computing infrastructures to deliver higher performance and reliability to edge devices in accessing mobile cloud services. The three-tier network architecture arising from cloud, cloudlet, and edge-devices can handle miscellaneous latency requirements for both latency-sensitive and latency-tolerant applications more efficiently than conventional two-tier networks. In this paper, we primarily focus on the static cloudlet network planning problem and propose an analytical hybrid cost-optimization framework for optimal cloudlet placement. We formulate this problem as a convex optimization problem and solve by using Karush-Kuhn-Tucker (KKT) conditions, and show that this framework can be evaluated without any scalability issues observed with integer programming based frameworks for large datasets. Moreover, we derive user-friendly closed form expressions that provide a first-hand estimation of cloudlet deployment cost depending on a few important network parameters like split-ratio, population density, and network bandwidth. Finally, we also show that the optimal solution of this analytical framework can be considered as a tight lower bound of the optimal solutions of integer programming based frameworks and makes a better cloudlet installation cost estimation compared to other existing frameworks.
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Sasaki, Sho, Yuichi Miyaji i Hideyuki Uehara. "A novel framework of routing policy for energy-efficient wireless sensor networks: Progress-based nearest forwarding". IEICE Communications Express 6, nr 3 (2017): 109–14. http://dx.doi.org/10.1587/comex.2016xbl0176.

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Rozprawy doktorskie na temat "CONEX framework"

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Jingzhi, Guo, i n/a. "Integrating Ad Hoc Electronic Product Catalogues Through Collaborative Maintenance of Semantic Consistency". Griffith University. School of Computing and Information Technology, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050824.125257.

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Existing electronic markets are fragmented in the sense that each is an information island. The interoperation of product information between them is difficult especially in semantics communication. This prevents the formation of global electronic markets and the lowering distribution cost through market globalisation. The traditional and contemporary ap-proaches of product standardisation and ontology mediation could solve the problem only if all markets could adopt the same product standards, or mediation systems could mediate all heterogeneous standards and markets without semantic conflicts. However, problems generally exist in adopting a universal standard or mediating all markets through existing mediation systems. A reflection of the issue is that there are millions of ad hoc electronic product catalogues (EPCs) situated in small and medium sized enterprises (SMEs), where each EPC is a semantic community, often not aware of standards and mediation systems due to its ad hoc nature. This thesis focuses on the semantic integration of autonomous ad hoc EPCs, which are semantically inconsistent with each other. Firstly, a novel Collaborative Concept Exchange (CONEX) approach is developed for the se-mantic integration of ad hoc EPCs. Using this approach, a PRODUCT MAP is first built based on the theories of semiotic analysis and market segmentation. It functions as an analytical framework to articulate ad hoc EPCs, and answers the questions: what are the general char-acteristics of ad hoc EPCs, what are their heterogeneous relations, and how they are unevenly distributed in fragmented electronic markets. Within this framework, an abstract representa-tion of ad hoc EPCs is proposed using the articulated elements that are simple and manipu-lable. Major contributions of this framework include: the models of the abstract representa-tion of ad hoc EPCs on their structures, concepts and contexts; the semantic integration conditions of heterogeneous ad hoc EPCs; and a ConexNet of market network topology that captures the characteristics of ad hoc EPCs that are unevenly distributed in fragmented elec-tronic markets. Secondly, a three-layer CONEX information model is proposed to integrate ad hoc EPCs based on the PRODUCT MAP, which provides a trichotomy of systems, designers and users. The strategy behind the model is the separation of structure from concept and context, and hence they can be independently managed to resolve semantic conflicts between ad hoc EPCs. The major contributions of this model include the CONEX framework, collaboration mechanism and context transformation. The CONEX framework presents a formal characteri-sation and reconstruction of the structures of ad hoc EPCs based on a CONEX structure model and a CONEX grammar. It provides a formal specification for representing ad hoc EPCs including concept structure, classifier structure and mapping structure. The semantic conflicts in designing the concepts of ad hoc EPCs are resolved by a collaboration mecha-nism based on a semantic consistency model. The collaboration mechanism includes three key procedures: replicating unique concept identifiers and translating concept definitions be-tween common concepts of common EPCs; localising common concepts to local EPCs; and globalising local concepts to common EPCs. Users in the CONEX information model are not involved in any integration activities. They are provided with automatic and accurate concept exchange services through a mechanism of context transformation, which is designed based on an algorithm called Heterogeneous Concept Transformation. The separate integration of structures, concepts and contexts of ad hoc EPCs guarantees that the requirements of flexi-bility, evolvability and exactness of semantic integration have been met. Thirdly, the feasibility and features of the Collaborative Concept Exchange approach have been demonstrated in a prototype implementation that provides the services of collaborative concept design for semantic conflict resolution, and heterogeneous concept transformation for accurate and automatic concept exchange between ad hoc EPCs. A key contribution in the implementation level is the independent representation of the CONEX framework called XML PRODUCT MAP (XPM). XPM provides a feature of platform independence by con-forming to the standards of W3C XML, Simple Object Access Protocol and Web Services Description Language in both document specification and document transport. It is also a demonstration that the generic CONEX structure model and CONEX grammar can be imple-mented in any specific language such as XML for the particular scenarios of semantic integra-tion. With the aid of a collection of XPM document templates, two components called Con-cept Collaborator and Concept Transformer of the CONEX prototype are implemented to demonstrate how concepts are collaboratively designed to resolve semantic conflicts and how concepts are automatically and accurately exchanged between autonomous, heterogeneous and distributed ad hoc EPCs.
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Guo, Jingzhi. "Integrating Ad Hoc Electronic Product Catalogues Through Collaborative Maintenance of Semantic Consistency". Thesis, Griffith University, 2005. http://hdl.handle.net/10072/365489.

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Existing electronic markets are fragmented in the sense that each is an information island. The interoperation of product information between them is difficult especially in semantics communication. This prevents the formation of global electronic markets and the lowering distribution cost through market globalisation. The traditional and contemporary ap-proaches of product standardisation and ontology mediation could solve the problem only if all markets could adopt the same product standards, or mediation systems could mediate all heterogeneous standards and markets without semantic conflicts. However, problems generally exist in adopting a universal standard or mediating all markets through existing mediation systems. A reflection of the issue is that there are millions of ad hoc electronic product catalogues (EPCs) situated in small and medium sized enterprises (SMEs), where each EPC is a semantic community, often not aware of standards and mediation systems due to its ad hoc nature. This thesis focuses on the semantic integration of autonomous ad hoc EPCs, which are semantically inconsistent with each other. Firstly, a novel Collaborative Concept Exchange (CONEX) approach is developed for the se-mantic integration of ad hoc EPCs. Using this approach, a PRODUCT MAP is first built based on the theories of semiotic analysis and market segmentation. It functions as an analytical framework to articulate ad hoc EPCs, and answers the questions: what are the general char-acteristics of ad hoc EPCs, what are their heterogeneous relations, and how they are unevenly distributed in fragmented electronic markets. Within this framework, an abstract representa-tion of ad hoc EPCs is proposed using the articulated elements that are simple and manipu-lable. Major contributions of this framework include: the models of the abstract representa-tion of ad hoc EPCs on their structures, concepts and contexts; the semantic integration conditions of heterogeneous ad hoc EPCs; and a ConexNet of market network topology that captures the characteristics of ad hoc EPCs that are unevenly distributed in fragmented elec-tronic markets. Secondly, a three-layer CONEX information model is proposed to integrate ad hoc EPCs based on the PRODUCT MAP, which provides a trichotomy of systems, designers and users. The strategy behind the model is the separation of structure from concept and context, and hence they can be independently managed to resolve semantic conflicts between ad hoc EPCs. The major contributions of this model include the CONEX framework, collaboration mechanism and context transformation. The CONEX framework presents a formal characteri-sation and reconstruction of the structures of ad hoc EPCs based on a CONEX structure model and a CONEX grammar. It provides a formal specification for representing ad hoc EPCs including concept structure, classifier structure and mapping structure. The semantic conflicts in designing the concepts of ad hoc EPCs are resolved by a collaboration mecha-nism based on a semantic consistency model. The collaboration mechanism includes three key procedures: replicating unique concept identifiers and translating concept definitions be-tween common concepts of common EPCs; localising common concepts to local EPCs; and globalising local concepts to common EPCs. Users in the CONEX information model are not involved in any integration activities. They are provided with automatic and accurate concept exchange services through a mechanism of context transformation, which is designed based on an algorithm called Heterogeneous Concept Transformation. The separate integration of structures, concepts and contexts of ad hoc EPCs guarantees that the requirements of flexi-bility, evolvability and exactness of semantic integration have been met. Thirdly, the feasibility and features of the Collaborative Concept Exchange approach have been demonstrated in a prototype implementation that provides the services of collaborative concept design for semantic conflict resolution, and heterogeneous concept transformation for accurate and automatic concept exchange between ad hoc EPCs. A key contribution in the implementation level is the independent representation of the CONEX framework called XML PRODUCT MAP (XPM). XPM provides a feature of platform independence by con-forming to the standards of W3C XML, Simple Object Access Protocol and Web Services Description Language in both document specification and document transport. It is also a demonstration that the generic CONEX structure model and CONEX grammar can be imple-mented in any specific language such as XML for the particular scenarios of semantic integra-tion. With the aid of a collection of XPM document templates, two components called Con-cept Collaborator and Concept Transformer of the CONEX prototype are implemented to demonstrate how concepts are collaboratively designed to resolve semantic conflicts and how concepts are automatically and accurately exchanged between autonomous, heterogeneous and distributed ad hoc EPCs.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Computing and Information Technology
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Silva, Agostinho Manuel Antunes da. "Improving industry 4.0 through service science: a framework to the portuguese ornamental stone sector in BIM procurement contex". Doctoral thesis, Universidade de Évora, 2018. http://hdl.handle.net/10174/23215.

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This thesis aims an exploratory evaluation of the Industry 4.0 (I4.0) impact on Portuguese Ornamental Stone (OS) firms’ response to the Threats resulting from the Building Information Modelling (BIM) procurement. The transition witnessed from the Third to the Fourth Industrial Age leads to the emergence of paradigms such as BIM, seeking efficiency in Architecture, Engineering and Construction (AEC) through a global approach and procurement oriented towards standardisable products and I4.0, where production comes to be supported by Cyber-Physical Systems (CPS). Integrated in the AEC supply chain, the OS sector shows Portugal to be the eighth country in OS trade worldwide, and the second per capita, with its competitiveness based on the products customization. BIM represents threats for its sustainability, particularly in firms of the Cluster Portugal Mineral Resources (CPMR). The literature review showed that Service Science (S-S) is an inter-disciplinary scientific field that combines Organisation with Tchnological Knowledge, with a view to categorizing, innovating and creating value for Service-Systems. Guided by the pragmatic paradigm and using the mixed methodology of parallel convergence, this research focuses on conceptualization of a Service Science Framework (Inovstone4.0), to which was applied a representative sample of CPMR companies. This Framework has allowed to measure the evolution of Key Concern Indicators (KCI) indexed to stakeholders’ concerns, when operations shifts from the current best practices to I4.0 operattions. From the results, it has been found significant relief of stakeholder’s concerns, regarding the time to deliver, costs, footprint and products conformity, when in BIM procurement context, the production evolves to I4.0, allowing to conclude that in technical terms, the impact of I4.0 on the threats arising from BIM procurement in CPMR tends to be positive; RESUMO: DESENVOLVIMENTO DA INDÚSTRIA 4.0 PELA SERVICE SCIENCE Modelo para a aumentar a Competitividade do Setor das Rochas Ornamentais Português em Contexto de Procurement BIM O objeto de estudo desta tese é explorar o potencial impacto da Industria 4.0 (I4.0) como resposta às ameaças resultantes da generalização do Building Information Modelling (BIM), nas empresas de Rochas Ornamentais (RO) portuguesas. Na transição da Terceira para a Quarta Era Industrial a que assistimos, emergem paradigmas como o BIM, que busca a eficiência na Arquitetura Engenharia e Construção (AEC) por via de uma abordagem global e de um modelo de procurement orientado para produtos standarizados e a I4.0, cuja produção passa a ser suportada por Cyber-Physical Systems (CPS). Integrado na cadeia de abastecimento da AEC, o setor das RO coloca Portugal como o oitavo país no comércio mundial de RO e segundo per capita, cuja competitividade provém da customização. Do procurement BIM, resultarão ameaças à sua sustentabilidade, nomeadamente nas empresas do Cluster Portugal Mineral Resources (CPMR). Da revisão de literatura verifica-se que a Service Science (S-S) é uma área científica interdisciplinar que combina organização e conhecimento tecnológico, com vista a categorizar, inovar e criar valor aos service-systems. Guiada pelo paradigma pragmatista e utilizando a metodologia mista paralela convergente, esta investigação centrou-se na conceptualização de um modelo S-S, que foi aplicado a uma amostra representativa das empresas do CPMR, permitiu medir de forma exploratória, a evolução das preocupações dos stakeholders, operacionalizadas por via de Key Concerns Indicators (KCI), quando as operações passam do estado atual, para o procurement BIM e produção I4.0. Dos resultados obtidos, verificou-se um alívio significativo das preocupações dos stakeholders quanto ao prazo de entrega, custo, sustentabilidade e qualidade dos produtos, quando as operações em contexto BIM evoluem para I4.0, permitindo concluir que em termos técnicos, o impacto da I4.0 sobre as ameaças resultantes do procurement BIM tende a ser positivo.
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Ortigosa, Martinez Rogelio. "On a new variational and computational framework for polyconvex nonlinear continuum mechanics and convex multi-variable nonlinear electro-elasticity". Thesis, Swansea University, 2016. https://cronfa.swan.ac.uk/Record/cronfa34893.

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The world of smart materials has experienced a dramatic revolution in the last decades. Electro Active and Magneto Active Materials are some of the most iconic of these, among which, dielectric and magnetostrictive elastomers are becoming extremely popular due to their outstanding actuation capabilities, and in lesser degree, to their energy harvesting capabilities. A clear example illustrating these extraordinary capabilities has been reported in the experimental literature, which has shown unprecedented extreme electrically induced deformations for the most representative dielectric elastomer, namely the acrylic elastomer VHB 4910.This thesis is focused on the development of well-posed constitutive models for nonlinear electro-elasticity in scenarios characterised by extreme deformations and extreme electric fields. This fundamental objective represents the underlying ingredient for the novel variational and computational frameworks developed hereby in the context of electro-elasticity. Very remarkably, the similarity between the equations in both electro-elasticity and magneto-elasticity, enables the variational and computational frameworks developed to be extended to the latter scenario, characterised by magnetomechanical interactions. Despite the enormous interest of the experimental and computational scientific community, the definition of suitable constitutive models is still at its early stages for both electro and magneto active materials. In the more specic context of elasticity, considerable effort has been devoted to the denition of polyconvex energy functionals, which entail the most widely accepted constitutive restriction, namely the ellipticity or Legendre-Hadamard condition. This condition, strongly related to the material stability of the constitutive equations, ensures the well-posedness of the governing equations. An extension of the ellipticity condition to the context of nonlinear electro-elasticity and hence, magneto-elasticity, is proposed in this work, ensuring the well-posedness of the equations for the entire range of deformations and electric or magnetic fields. It is important to emphasise that in this work, the extension of the ellipticity condition to the field of electro-elasticity is exclusively based on material stability considerations. The energy functional encoding the constitutive response of the electro active material is defined according to a novel convex multi-variable representation in terms of an extended set of arguments which ensures material stability. The extended set of arguments, including those characterising the concept of polyconvexity in the more specic scenario of nonlinear elasticity, is further enriched with additional electromechanical entities. Unfortunately, proof of sequential weak lower semicontinuity of the proposed definition of multi-variable convexity is not provided in this work. This condition, and the additional requirement of appropriate coercivity conditions on the energy functional, would ensure the existence of minimisers. Nevertheless, although of extreme relevance and scientific interest, this topic is not in the scope of the thesis and could be the objective of further research.
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Morgan, Joshua Edward. "Dynamic Information Density for Image Classification in an Active Learning Framework". Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1588272709621413.

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Hargrave, Catriona E. "The development of a clinical decision making framework for image guided radiotherapy". Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/117125/1/Catriona_Hargrave_Thesis.pdf.

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This thesis developed a decision-support Bayesian network (BN) and complementary visualisation tool for image-guided radiotherapy (IGRT). These tools form the framework for a future decision-support system that will rapidly analyse cone beam computed tomography (CBCT) images and provide advice to clinicians whether to proceed with treatment delivery or if a pre-treatment intervention is required. Clinical experts completed an IGRT practice survey, which along with published and clinical data were used to develop the BN. The visualisation tool graphically summarises daily tumour and organ-at-risk variations routinely observed on CBCT images, which can result in incorrect targeting of the radiation fields.
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Reshef, Aymeric. "Dual-rotation C-arm cone-beam tomographic acquisition and reconstruction frameworks for low-contrast detection in brain soft-tissue imaging". Electronic Thesis or Diss., Paris, ENST, 2018. http://www.theses.fr/2018ENST0044.

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L’arceau interventionnel est un système d’imagerie rayons X temps réel. Il dispose d’une option tomographique qui, grâce à une rotation de l’arceau autour du patient, permet d’acquérir des images en coupes dont la résolution en contraste est plus faible que celle des tomodensitomètres diagnostiques, rendant l’information clinique des tissus mous du cerveau inexploitable. Nous proposons un nouveau mode d’acquisition et de reconstruction tomographiques sur arceau interventionnel pour l’amélioration de la détection des faibles contrastes en imagerie interventionnelle des tissus mous de la tête. Afin d’émuler un filtre « bow-tie » (en nœud papillon), une double acquisition est envisagée. Les spécificités de la double acquisition imposent la conception d’un algorithme de reconstruction itérative dédié, incluant le filtre rampe dans l’énergie de minimisation. En bifurquant des approches par rétro-projection filtrée vers celles par filtration des rétro-projections, une méthode de reconstruction directe, alternative à la précédente, est proposée pour les acquisitions doubles. Pour une acquisition simple, la méthode est assurée de faire aussi bien que l’algorithme de rétro-projection filtrée quel que soit l’échantillonnage angulaire en géométrie planaire, et offre une approximation alternative à l’algorithme de Feldkamp-Davis-Kress en géométrie conique. Nous montrons qu’avec peu ou pas de modifications aux schémas précédents, les deux méthodes de reconstruction (itérative et directe) s’adaptent bien à la reconstruction de régions d’intérêt, à laquelle l’acquisition double reste étroitement liée à travers son acquisition tronquée
Interventional C-arm systems are real-time X-ray imaging systems, that can perform tomographic acquisitions by rotating the C-arm around the patient ; however, C-arm cone-beam computed tomography (CBCT) achieves a lower contrast resolution than diagnostic CT, which is necessary in order to benefit from the clinical information of soft tissues in the brain. We propose a new C-arm CBCT acquisition and reconstruction framework to increase low-contrast detection in brain soft-tissue imaging. In order to emulate a bow-tie filter, a dualrotation acquisition is proposed. To account for all the specificities of the dual-rotation acquisition, a dedicated iterative reconstruction algorithm is designed, that includes the ramp filter in the cost function. By switching from filtered backprojection (FBP) to backprojection-filtration (BPF) reconstruction methods, we propose an alternative, direct reconstruction method for dual-rotation acquisitions. For single-rotation acquisitions, the method ensures to perform as good as FBP with arbitrarily coarse angular sampling in planar geometries, and provides a different approximation from the Feldkamp-Davis-Kress (FDK) algorithm in the cone-beam geometry. Although we used it to emulate a virtual bow-tie, our dual-rotation acquisition framework is intrinsically related to region-of-interest (ROI) imaging through the truncated acquisition. With few or no modification of the proposed reconstruction methods, we successfully addressed the problem of ROI imaging in the context of dual-rotation acquisitions
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Stühmer, Jan [Verfasser], Daniel [Akademischer Betreuer] [Gutachter] Cremers i William T. [Gutachter] Freeman. "A Convex Optimization Framework for Connectivity Constraints in Image Segmentation and 3D Reconstruction / Jan Stühmer ; Gutachter: Daniel Cremers, William T. Freeman ; Betreuer: Daniel Cremers". München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1131253671/34.

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McLaggan, Martyn Scott. "Novel fire testing frameworks for Phase Change Materials and hemp-lime insulation". Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/15896.

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Modern buildings increasingly include the usage of innovative materials aimed at improving sustainability and reducing the carbon footprint of the built environment. Phase Change Materials (PCMs) are one such group of novel materials which reduce building energy consumption. These materials are typically flammable and contained within wall linings yet there has been no detailed assessment of their fire performance. Current standard fire test methods provide means to compare similar materials but do not deliver knowledge on how they would behave in the event of a real fire. Thus, the aim of this thesis is to develop a novel testing framework to assess the behaviour of these materials in realistic fire scenarios. For PCMs, a flammability study is conducted in the bench-scale cone calorimeter to evaluate the fire risk associated with these materials. Then, micro-scale Thermogravimetric Analysis (TGA) is used to identify the fundamental chemical reactions to be able to confidently interpret the flammability results. Finally, intermediate-scale standard fire tests are conducted to evaluate the applicability of the bench-scale results to realistic fire scenarios. These take the form of modified Lateral Ignition and Flame spread Test (LIFT) and Single Burning Item (SBI) tests to understand flame spread and compartment fires respectively. Finally, a simplified method to combine this knowledge for use in building design is proposed. This method allows the balancing of potential energy benefits with quantified fire performance to achieve the specified goals of the designer. Hemp-lime insulation is a material which has also becoming increasingly popular in the drive towards sustainability. The porous nature of the material means that smouldering combustions are the dominant reaction mode but there is currently no standardised test method for this type of behaviour. Thus, hemp-lime materials also represent an unquantified risk. The work in this thesis defines a simple, accessible and economically viable bench-scale method for quantifying the fire risk associated with rigid porous materials. This is applicable for both downward opposed flow and upward forward flow smoulder propagation conditions. The behaviour is then interpreted using micro-scale thermogravimetric analysis to understand the underlying pyrolysis and oxidation reactions. Designers can utilise this framework to quantify the smouldering risk associated with hemp-lime materials to enable their usage in the built environment. The holistic fire risk assessment performed in this thesis has quantified the behaviour of PCMs and hemp-lime insulation applicable to realistic fire scenarios. The simplified design method empowers designers to be able to realise innovative buildings through fundamental understanding of the fire behaviour of these materials. The outcomes of this thesis allow designers to mitigate the fire risk associated with these materials and achieve optimised engineering solutions. Furthermore, the novel fire testing frameworks provide the economically viable means to assess the fire performance of future PCMs and hemp-lime products which ensures lasting relevance of this research in the future.
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Kervazo, Christophe. "Optimization framework for large-scale sparse blind source separation". Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS354/document.

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Lors des dernières décennies, la Séparation Aveugle de Sources (BSS) est devenue un outil de premier plan pour le traitement de données multi-valuées. L’objectif de ce doctorat est cependant d’étudier les cas grande échelle, pour lesquels la plupart des algorithmes classiques obtiennent des performances dégradées. Ce document s’articule en quatre parties, traitant chacune un aspect du problème: i) l’introduction d’algorithmes robustes de BSS parcimonieuse ne nécessitant qu’un seul lancement (malgré un choix d’hyper-paramètres délicat) et fortement étayés mathématiquement; ii) la proposition d’une méthode permettant de maintenir une haute qualité de séparation malgré un nombre de sources important: iii) la modification d’un algorithme classique de BSS parcimonieuse pour l’application sur des données de grandes tailles; et iv) une extension au problème de BSS parcimonieuse non-linéaire. Les méthodes proposées ont été amplement testées, tant sur données simulées que réalistes, pour démontrer leur qualité. Des interprétations détaillées des résultats sont proposées
During the last decades, Blind Source Separation (BSS) has become a key analysis tool to study multi-valued data. The objective of this thesis is however to focus on large-scale settings, for which most classical algorithms fail. More specifically, it is subdivided into four sub-problems taking their roots around the large-scale sparse BSS issue: i) introduce a mathematically sound robust sparse BSS algorithm which does not require any relaunch (despite a difficult hyper-parameter choice); ii) introduce a method being able to maintain high quality separations even when a large-number of sources needs to be estimated; iii) make a classical sparse BSS algorithm scalable to large-scale datasets; and iv) an extension to the non-linear sparse BSS problem. The methods we propose are extensively tested on both simulated and realistic experiments to demonstrate their quality. In-depth interpretations of the results are proposed
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Książki na temat "CONEX framework"

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Malamud, Andrés. Presidentialism in the Southern Cone: A framework for analysis. San Domenico di Fiesole (Firenze): European university institute, 2001.

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Malamud, Andrés. Presidentialism in the Southern Cone: A framework for analysis. Badia Fiesolana, San Domenico (FI): European University Institute, 2001.

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Chico, Carey. Framework for Game Production: Reducing the Cone of Uncertainty. Taylor & Francis Group, 2019.

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Chambers, Robert G. Competitive Agents in Certain and Uncertain Markets. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190063016.001.0001.

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This book uses concepts from optimization theory to develop an integrated analytic framework for treating consumer, producer, and market equilibrium analyses as special cases of a generic optimization problem. The same framework applies to both stochastic and non-stochastic decision settings, so that the latter is recognized as an (important) special case of the former. The analytic techniques are borrowed from convex analysis and variational analysis. Special emphasis is given to generalized notions of differentiability, conjugacy theory, and Fenchel's Duality Theorem. The book shows how virtually identical conjugate analyses form the basis for modeling economic behavior in each of the areas studied. The basic analytic concepts are borrowed from convex analysis. Special emphasis is given to generalized notions of differentiability, conjugacy theory, and Fenchel's Duality Theorem. It is demonstrated how virtually identical conjugate analyses form the basis for modelling economic behaviour in each of the areas studied.
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Murphy, Kaitlin M. Mapping Memory. Fordham University Press, 2018. http://dx.doi.org/10.5422/fordham/9780823282548.001.0001.

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In Mapping Memory: Visuality, Affect, and Embodied Politics in the Americas, Kaitlin M. Murphy analyzes a range of visual memory practices that have emerged in opposition to political discourses and visual economies that suppress certain subjects and overlook past and present human rights abuses. From the Southern Cone to Central America and the US-Mexico borderlands, and across documentary film, photography, performance, memory sites, and new media, she compares how these visual texts use memory as a form of contemporary intervention. Interweaving visual and performance theory with memory and affect, Murphy develops new frameworks for analyzing how visual culture performs as an embodied agent of memory and witnessing. She argues that visuality is inherently performative; and analyzing the performative elements, or strategies, of visual texts—such as embodiment, reperformance, reenactment, haunting, and the performance of material objects and places—elucidates how memory is both anchored into and extracted from specific bodies, objects, and places. Murphy progressively develops the theory of memory mapping, defined as the visual process of representing the affective, sensorial, polyvocal, and temporally layered relationship between past and present, anchored within the specificities of place. Ultimately, by exploring how memory is “mapped” across a range of sites and mediums, Murphy argues that memory mapping is a visual strategy for producing new temporal and spatial arrangements of knowledge and memory that function as counter-practices to official narratives that often neglect or designate as transgressive certain memories or experiences.
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Części książek na temat "CONEX framework"

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Pinoli, Jean-Charles. "The Convex Geometric Framework". W Mathematical Foundations of Image Processing and Analysis 2, 37–45. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984574.ch24.

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Baranyi, Péter. "Convex Hull Manipulation Based Optimization". W TP-Model Transformation-Based-Control Design Frameworks, 117–29. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-19605-3_10.

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Masson-Matthee, Mariëlle D. "The Codex Alimentarius Commission: The Institutional Framework". W The Codex Alimentarius Commission and Its Standards, 13–50. The Hague: T.M.C. Asser Press, 2007. http://dx.doi.org/10.1007/978-90-6704-515-5_2.

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Gawrilow, Ewgenij, i Michael Joswig. "polymake: a Framework for Analyzing Convex Polytopes". W Polytopes — Combinatorics and Computation, 43–73. Basel: Birkhäuser Basel, 2000. http://dx.doi.org/10.1007/978-3-0348-8438-9_2.

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Verma, Mohit, Aikaterini Stefanaki, Mettupalayam V. Sivaselvan, J. Rajasankar i Nagesh R. Iyer. "A Convex Optimization Framework for Hybrid Simulation". W Advances in Structural Engineering, 221–31. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2190-6_21.

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Baranyi, Péter. "Convex TP Model of the Dual Excenter Vibration System". W TP-Model Transformation-Based-Control Design Frameworks, 171–78. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-19605-3_14.

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Pimentel, R., i W. de Paula. "Excited States of the Wick–Cutkosky Model with the Nakanishi Representation in the Light-Front Framework". W Light Cone 2015, 277–82. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50699-9_44.

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Toussaint, Antoine, i Ronnie Sircar. "A Framework for Dynamic Hedging under Convex Risk Measures". W Seminar on Stochastic Analysis, Random Fields and Applications VI, 429–51. Basel: Springer Basel, 2011. http://dx.doi.org/10.1007/978-3-0348-0021-1_24.

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Masson-Matthee, Mariëlle D. "The Legitimacy of The Codex Alimentarius, The Standard-Setting Procedure and The Institutional Framework". W The Codex Alimentarius Commission and Its Standards, 201–67. The Hague: T.M.C. Asser Press, 2007. http://dx.doi.org/10.1007/978-90-6704-515-5_6.

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Rockafellar, R. Tyrrell. "Risk and Utility in the Duality Framework of Convex Analysis". W Springer Proceedings in Mathematics & Statistics, 21–42. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36568-4_3.

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Streszczenia konferencji na temat "CONEX framework"

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Yeh, Tsaiyao, Joel Pokorny i Vivianne C. Smith. "S-cone discrimination and the 100-hue test". W Noninvasive Assessment of the Visual System. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/navs.1991.wb3.

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Last year, we presented a analysis which provided a framework for reconciling S-cone detection and discrimination data [1]. A theoretical template which used Boynton & Kambe's [2] definition of S-cone trolands was used to derive a model template relating S-cone detection to S-cone backgrounds. In the past year, we have examined detection and discrimination data collected under various adaptation conditions. These data demonstrate that short and long wavelength backgrounds affect the theoretical template differently. The purpose of this paper is to present these experimental data and extend the analysis. Data collected under diverse conditions all point to the TVR function for the S-cones having more than one gain control mechanism. First we will describe the data set and then the modeling.
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Huang, Xin, i Tilman Wolf. "A next generation internet state management framework". W the 2007 ACM CoNEXT conference. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1364654.1364740.

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Natarajan, Sriram, i Xin Huang. "An interactive visualization framework for next generation networks". W the ACM CoNEXT Student Workshop. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1921206.1921222.

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Negrut, Dan, Alessandro Tasora i Mihai Anitescu. "Large-Scale Parallel Multibody Dynamics With Frictional Contact on the GPU". W ASME 2008 Dynamic Systems and Control Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/dscc2008-2139.

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In the context of simulating the frictional contact dynamics of large systems of rigid bodies, this paper reviews a novel method for solving large cone complementarity problems by means of a fixed-point iteration algorithm. The method is an extension of the Gauss-Seidel and Gauss-Jacobi methods with overrelaxation for symmetric convex linear complementarity problems. Convergent under fairly standard assumptions, the method is implemented in a parallel framework by using a single instruction multiple data (SIMD) computation paradigm promoted by the Compute Unified Device Architecture (CUDA) library for graphical processing unit (GPU) programming. The framework is anticipated to become a viable tool for investigating the dynamics of complex systems such as ground vehicles running on sand, powder composites, and granular material flow.
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Tasora, Alessandro, Dan Negrut i Mihai Anitescu. "A GPU-Based Implementation of a Cone Convex Complementarity Approach for Simulating Rigid Body Dynamics With Frictional Contact". W ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66766.

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In the context of simulating the frictional contact dynamics of large systems of rigid bodies, this paper reviews a novel method for solving large cone complementarity problems by means of a fixed-point iteration algorithm. The method is an extension of the Gauss-Seidel and Gauss-Jacobi methods with over-relaxation for symmetric convex linear complementarity problems. Convergent under fairly standard assumptions, the method is implemented in a parallel framework by using a single instruction multiple data computation paradigm promoted by the Compute Unified Device Architecture library for graphical processing unit programming. The framework supports the analysis of problems with a large number of rigid bodies in contact. Simulation thus becomes a viable tool for investigating the dynamics of complex systems such as ground vehicles running on sand, powder composites, and granular material flow.
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Wählisch, Matthias, Sebastian Meiling i Thomas C. Schmidt. "A framework for nation-centric classification and observation of the internet". W the ACM CoNEXT Student Workshop. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1921206.1921223.

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Gallenmüller, Sebastian, Dominik Scholz, Henning Stubbe i Georg Carle. "The pos framework". W CoNEXT '21: The 17th International Conference on emerging Networking EXperiments and Technologies. New York, NY, USA: ACM, 2021. http://dx.doi.org/10.1145/3485983.3494841.

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H M P, Shekhar, i K. S. Ramanatha. "Mobile agents based framework for routing and congestion control in mobile ad hoc networks". W the 2006 ACM CoNEXT conference. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1368436.1368471.

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Padala, Manisha, i Sujit Gujar. "FNNC: Achieving Fairness through Neural Networks". W Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. California: International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/315.

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In classification models, fairness can be ensured by solving a constrained optimization problem. We focus on fairness constraints like Disparate Impact, Demographic Parity, and Equalized Odds, which are non-decomposable and non-convex. Researchers define convex surrogates of the constraints and then apply convex optimization frameworks to obtain fair classifiers. Surrogates serve as an upper bound to the actual constraints, and convexifying fairness constraints is challenging. We propose a neural network-based framework, \emph{FNNC}, to achieve fairness while maintaining high accuracy in classification. The above fairness constraints are included in the loss using Lagrangian multipliers. We prove bounds on generalization errors for the constrained losses which asymptotically go to zero. The network is optimized using two-step mini-batch stochastic gradient descent. Our experiments show that FNNC performs as good as the state of the art, if not better. The experimental evidence supplements our theoretical guarantees. In summary, we have an automated solution to achieve fairness in classification, which is easily extendable to many fairness constraints.
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Daducci, Alessandro, Alessandro Dal Palu, Alia Lemkaddem i Jean-Philippe Thiran. "A convex optimization framework for global tractography". W 2013 IEEE 10th International Symposium on Biomedical Imaging (ISBI 2013). IEEE, 2013. http://dx.doi.org/10.1109/isbi.2013.6556527.

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Raporty organizacyjne na temat "CONEX framework"

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Rodrigues Bastos, Fabiano, Diego Gutiérrez i Virginia Queijo Von Heideken. No Time for Later: Rebuilding Macro Buffers in the Southern Cone amid a Revamped Global Financial Landscape. Inter-American Development Bank, grudzień 2022. http://dx.doi.org/10.18235/0004571.

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Global financial shocks under a revamped global financial landscape can produce unexpected, multi-faceted, and disruptive implications for emerging market economies. Using the VIX index as a proxy for global financial stress, we argue that Southern Cone macro conditions can undergo significant pressure under adverse global financial shocks. The region needs to start rebuilding macro buffers now -in addition to simultaneously correcting macro imbalances and enhancing policy frameworks- to cope with the emerging global financial environment. International organizations, including multilateral development banks, can play several key roles in supporting the rebuilding of macro buffers.
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Niazi, Fawad. CPT-Based Geotechnical Design Manual, Volume 1: CPT Interpretation—Estimation of Soil Properties. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317346.

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This manual provides guidance on how to use the cone penetration test (CPT) for site investigation and foundation design. The manual has been organized into three volumes. Volume 1 covers the execution of CPT-based site investigations and presents a comprehensive literature review of CPT-based soil behavior type (SBT) charts and estimation of soil variables from CPT results. Volume 2 covers the methods and equations needed for CPT data interpretation and foundation design in different soil types, while Volume 3 includes several example problems (based on instrumented case histories) with detailed, step-by-step calculations to demonstrate the application of the design methods. The methods included in the manual are current, reliable, and demonstrably the best available for Indiana geology based on extensive CPT research carried out during the past two decades. The design of shallow and pile foundations in the manual is based on the load and resistance factor design (LRFD) framework. The manual also indicates areas of low reliability and limited knowledge, which can be used as indicators for future research.
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Sakleshpur, Venkata A., Monica Prezzi, Rodrigo Salgado i Mir Zaheer. CPT-Based Geotechnical Design Manual, Volume 2: CPT-Based Design of Foundations—Methods. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317347.

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This manual provides guidance on how to use the cone penetration test (CPT) for site investigation and foundation design. The manual has been organized into three volumes. Volume 1 covers the execution of CPT-based site investigations and presents a comprehensive literature review of CPT-based soil behavior type (SBT) charts and estimation of soil variables from CPT results. Volume 2 covers the methods and equations needed for CPT data interpretation and foundation design in different soil types, while Volume 3 includes several example problems (based on instrumented case histories) with detailed, step-by-step calculations to demonstrate the application of the design methods. The methods included in the manual are current, reliable, and demonstrably the best available for Indiana geology based on extensive CPT research carried out during the past two decades. The design of shallow and pile foundations in the manual is based on the load and resistance factor design (LRFD) framework. The manual also indicates areas of low reliability and limited knowledge, which can be used as indicators for future research.
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Sakleshpur, Venkata A., Monica Prezzi, Rodrigo Salgado i Mir Zaheer. CPT-Based Geotechnical Design Manual, Volume 3: CPT-Based Design of Foundations—Example Problems. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317348.

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This manual provides guidance on how to use the cone penetration test (CPT) for site investigation and foundation design. The manual has been organized into three volumes. Volume 1 covers the execution of CPT-based site investigations and presents a comprehensive literature review of CPT-based soil behavior type (SBT) charts and estimation of soil variables from CPT results. Volume 2 covers the methods and equations needed for CPT data interpretation and foundation design in different soil types, while Volume 3 includes several example problems (based on instrumented case histories) with detailed, step-by-step calculations to demonstrate the application of the design methods. The methods included in the manual are current, reliable, and demonstrably the best available for Indiana geology based on extensive CPT research carried out during the past two decades. The design of shallow and pile foundations in the manual is based on the load and resistance factor design (LRFD) framework. The manual also indicates areas of low reliability and limited knowledge, which can be used as indicators for future research.
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