Academic literature on the topic 'Simply connected'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Simply connected.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Simply connected"

1

Paré, Robert. "Simply Connected Limits." Canadian Journal of Mathematics 42, no. 4 (1990): 731–46. http://dx.doi.org/10.4153/cjm-1990-038-6.

Full text
Abstract:
The importance of finite limits in completeness conditions has been long recognized. One has only to consider elementary toposes, pretoposes, exact categories, etc., to realize their ubiquity. However, often pullbacks suffice and in a sense are more natural. For example it is pullbacks that are the essential ingredient in composition of spans, partial morphisms and relations. In fact the original definition of elementary topos was based on the notion of partial morphism classifier which involved only pullbacks (see [6]). Many constructions in topos theory, involving left exact functors, such as coalgebras on a cotriple and the gluing construction, also work for pullback preserving functors. And pullback preserving functors occur naturally in the subject, e.g. constant functors and the Σα. These observations led Rosebrugh and Wood to introduce partial geometric morphisms; functors with a pullback preserving left adjoint [9]. Other reasons led Kennison independently to introduce the same concept under the name semi-geometric functors [5].
APA, Harvard, Vancouver, ISO, and other styles
2

Kreck, Matthias. "Simply connected asymmetric manifolds." Journal of Topology 2, no. 2 (2009): 249–61. http://dx.doi.org/10.1112/jtopol/jtp008.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Kreck, Matthias. "Simply connected asymmetric manifolds." Journal of Topology 4, no. 1 (2011): 254–55. http://dx.doi.org/10.1112/jtopol/jtq040.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bonatto, Marco, and Petr Vojtěchovský. "Simply connected latin quandles." Journal of Knot Theory and Its Ramifications 27, no. 11 (2018): 1843006. http://dx.doi.org/10.1142/s021821651843006x.

Full text
Abstract:
A (left) quandle is connected if its left translations generate a group that acts transitively on the underlying set. In 2014, Eisermann introduced the concept of quandle coverings, corresponding to constant quandle cocycles of Andruskiewitsch and Graña. A connected quandle is simply connected if it has no nontrivial coverings, or, equivalently, if all its second constant cohomology sets with coefficients in symmetric groups are trivial. In this paper, we develop a combinatorial approach to constant cohomology. We prove that connected quandles that are affine over cyclic groups are simply connected (extending a result of Graña for quandles of prime size) and that finite doubly transitive quandles of order different from [Formula: see text] are simply connected. We also consider constant cohomology with coefficients in arbitrary groups.
APA, Harvard, Vancouver, ISO, and other styles
5

Assem, Ibrahim, and Andrzej Skowroński. "Tilting simply connected algebras." Communications in Algebra 22, no. 12 (1994): 4611–19. http://dx.doi.org/10.1080/00927879408825091.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Assem, I., M. I. Platzeck, M. J. Redondo, and S. Trepode. "Simply connected incidence algebras." Discrete Mathematics 269, no. 1-3 (2003): 333–55. http://dx.doi.org/10.1016/s0012-365x(03)00128-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Dimovski, Dončo. "Non-simply connected copes." Topology and its Applications 21, no. 2 (1985): 147–57. http://dx.doi.org/10.1016/0166-8641(85)90101-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Assem, Ibrahim, and Shiping Liu. "Strongly Simply Connected Algebras." Journal of Algebra 207, no. 2 (1998): 449–77. http://dx.doi.org/10.1006/jabr.1998.7457.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Assem, Ibrahim, and Peter Brown. "Strongly simply connected Auslander algebras." Glasgow Mathematical Journal 39, no. 1 (1997): 21–27. http://dx.doi.org/10.1017/s0017089500031864.

Full text
Abstract:
Letkbe an algebraically closed field. By an algebra is meant an associative finite dimensionalk-algebra A with an identity. We are interested in studying the representation theory of Λ, that is, in describing the category mod Λ of finitely generated right Λ-modules. Thus we may, without loss of generality, assume that Λ is basic and connected. For our purpose, one strategy consists in using covering techniques to reduce the problem to the case where the algebra is simply connected, then in solving the problem in this latter case. This strategy was proved efficient for representation-finite algebras (that is, algebras having only finitely many isomorphism classes of indecomposable modules) and representation-finite simply connected algebras are by now well-understood: see, for instance [5], [7],[8]. While little is known about covering techniques in the representation-infinite case, it is clearly an interesting problem to describe the representation-infinite simply connected algebras. The objective of this paper is to give a criterion for the simple connectedness of a class of (mostly representationinfinite) algebras.
APA, Harvard, Vancouver, ISO, and other styles
10

Kaiser, N. "Mean eigenvalues for simple, simply connected, compact Lie groups." Journal of Physics A: Mathematical and General 39, no. 49 (2006): 15287–98. http://dx.doi.org/10.1088/0305-4470/39/49/013.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Simply connected"

1

Hutt, Steve. "Surgery on simply connected Poincare spaces." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/15083.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Deigård, Patrik. "Liouville’s equation on simply connected domains." Thesis, Uppsala universitet, Algebra och geometri, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-419483.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Heck, Prudence. "Knot concordance in non-simply connected manifolds." [Bloomington, Ind.] : Indiana University, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3386681.

Full text
Abstract:
Thesis (Ph.D.)--Indiana University, Dept. of Mathematics, 2009.<br>Title from PDF t.p. (viewed on Jul 20, 2010). Source: Dissertation Abstracts International, Volume: 70-12, Section: B, page: 7602. Adviser: Kent Orr.
APA, Harvard, Vancouver, ISO, and other styles
4

Topkara, Mustafa. "Exotic Smooth Structures On Non-simply Connected 4-manifolds." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611752/index.pdf.

Full text
Abstract:
In this thesis, we study exotic smooth structures on 4-manifolds with finite fundamental groups. For an arbitrary finite group G, we construct an infinite family of smooth 4-manifolds with fundamental group G, which are all homeomorphic but mutually non-diffeomorphic, using the small symplectic manifold with arbitrary fundamental group constructed by S. Baldridge and P. Kirk, together with the methods of A. Akhmedov, R.&amp<br>#221<br>. Baykur and D. Park for constructing infinite families of exotic simply connected 4-manifolds. In the final chapter, pairs of small exotic 4-manifolds with a cyclic fundamental group of any odd order are constructed.
APA, Harvard, Vancouver, ISO, and other styles
5

Yasuhara, Akira. "Surfaces in simply connected 4-manifolds and their cross-sections /." Electronic version of summary, 1994. http://www.wul.waseda.ac.jp/gakui/gaiyo/2010.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Katsigianni, Efstathia [Verfasser]. "Rank 1 isocrystals on simply connected varieties and their moduli / Efstathia Katsigianni." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1176707345/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Bauer, Ulrich Josef [Verfasser], Stephan [Gutachter] Ruscheweyh, and Wolfgang [Gutachter] Lauf. "Conformal Mappings onto Simply and Multiply Connected Circular Arc Polygon Domains / Ulrich Josef Bauer. Gutachter: Stephan Ruscheweyh ; Wolfgang Lauf." Würzburg : Universität Würzburg, 2016. http://d-nb.info/1111784388/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Silva, Marcelo Moreira da. "Álgebras de incidência hereditárias por partes." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/45/45131/tde-29032017-221809/.

Full text
Abstract:
Apresentamos um estudo das álgebras de incidência que são hereditárias por partes, as quais denominamos Phias, piecewise hereditary incidence algebras. Através da aljava com relações, descrevemos as Phias de tipo Dynkin e introduzimos uma nova família de Phias de tipo Dynkin extendido chamada família ANS, em referência a Assem, Nehring e Skowronski. Nessa descrição, o importante método foi o dos cortes em extensões triviais, os quais inspiraram a elaboração de um programa que concebe exatamente os cortes na extensão trivial dada que resultam em álgebras de incidência. Abordamos as Phias &#922\\&#916 de tipo feixes, estudando o &#922\\&#916-módulo sincero canônico M e a álgebra de extensão por um ponto &#922\\&#916[&#924]. Demonstramos que se &#922Q/I é uma álgebra sincera, quase-inclinada canônica de tipo aljava e tipo de representação infinito, então os &#922Q/I-módulos sinceros são excepcionais. Essa conclusão permite construir uma gama de Phias &#922\\&#916[&#924] de tipo selvagem. Exploramos as Phias simplesmente conexas, provando uma resposta positiva para o problema de Skowronski para &#922\\&#916 uma Phia de tipo H, com grafo de objetos inclinantes &#922_D^b (&#919) conexo: o grupo &#919^1(&#922\\&#916) é trivial se, e somente se, a álgebra &#922\\&#916 é simplesmente conexa. Na área homológica, determinamos um limitante superior da dimensão global forte das Phias; mais ainda, ampliamos esse resultado para as álgebras sinceras provando que dada uma álgebra sincera e hereditária por partes, sua dimensão global forte é menor ou igual a três.<br>We present a study of incidence algebras that are piecewise hereditary, which we denominate Phias. By means of the quiver with relations, we describe Phias of Dynkin type and introduce a new family of Phias of extended Dynkin type, which we call ANS family, in reference to Assem, Nehring, and Skowronski. In this description, the important method was the one of cuts on trivial extensions, inspiring the writing of a program that shows exactly the cuts on the given trivial extension that result on incidence algebras. We approach sheaves type Phias &#922\\&#916, studying the canonical sincere &#922\\&#916-module M and the one-point extension algebra &#922\\&#916[&#924]. We show that if &#922Q/I is a sincere, quasi-tilted canonical algebra of quiver type and infinite representation type, then sincere &#922Q/I-modules are exceptional. This conclusion allows the construction of a wide range of Phias &#922\\&#916[&#924] wild type. We explore the simply conectedeness of Phias, proving a positive answer of the so called Skowronski problem for &#922\\&#916 a Phia H type, with connected quiver of tilting objects &#922_D^b (&#919): the group &#919^1(&#922\\&#916) is trivial if, and only if, &#922\\&#916 is a simply connected algebra. On homology, we determine an upper bound for the strong global dimension of Phias; furthermore, we extend this result for sincere algebras proving that the strong global dimension of a sincere piecewise hereditary algebra is less or equal to three.
APA, Harvard, Vancouver, ISO, and other styles
9

Gupta, Piyush. "Importance of Detailed Modeling of Loads/PV Systems Connected to Secondary of Distribution Transformers." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/79820.

Full text
Abstract:
Residential solar Photovoltaic (PV) installations are increasing at a very high pace in the United States. In 2017 there are approximately one million residential solar PV installations in the US. A significant share of these installations are downstream of distribution transformers and thus connected to the secondary. To precisely analyze voltage variations induced by PV systems into distribution systems, accurate models of load and PV systems connected to the secondary side of distribution transformers are required. In the work here we consider two secondary circuit modeling approaches, simple secondary and detailed secondary models. In simple secondary models all loads and all PV generators below a distribution transformer are modeled as an aggregate load and an aggregate PV generator. In the detailed secondary models all loads and PV systems below the distribution transformers are modeled individually and secondary conductors and service drops are also modeled. Using a cloud motion simulator, it is observed that employing the simple secondary models can lead to inaccurate and conservative results. Moreover, the locations with the greatest voltage changes are different in the two modeling approaches. This paper highlights the importance of utilizing detailed secondary models over simple secondary models in analyzing PV generation.<br>Master of Science
APA, Harvard, Vancouver, ISO, and other styles
10

Xu, Yongchao. "Tree-based shape spaces : definition and applications in image processing and computer vision." Phd thesis, Université Paris-Est, 2013. http://tel.archives-ouvertes.fr/tel-00981623.

Full text
Abstract:
In a large number of applications, the processing relies on objects or area of interests, and the pixel-based image representation is notwell adapted. These applications would benefit from a region-based processing. Early examples of region-based processing can be found in the area of image segmentation, such as the quad tree. Recently, in mathematical morphology, the connected operators have received much attention. They are region-based filtering tools that act by merging flat zones. They have good contour preservation properties in the sense that they do not create any new boundaries, neither do they shift the existing ones. One popular implementation for connected operators relies on tree-based image representations, notably threshold decomposition representations and hierarchical representations. Those tree-based image representations are widely used in many image processing and computer vision applications. Tree-based connected operators consist in constructing a set of nested or disjoint connected components, followed by a filtering of these connected components based on an attribute function characterizing each connected component. Finally, the filtered image is reconstructed from the simplified tree composed of the remaining connected components. In the work presented in this thesis, we propose to expand the ideas of tree-based connected operators. We introduce the notion of tree-based shape spaces, built from tree-based image representations. Many state-of-the-art methods relying on tree-based image representations consist of analyzing this shape space. A first consequence of this change of point of view is our proposition of a local feature detector, called the tree-based Morse regions (TBMR). It can be seen as a variant of the MSER method. The selection of TBMRs is based on topological information, and hence it extracts the regions independently of the contrast, which makes it truly contrast invariant and quasi parameters free. The accuracy and robustness of the TBMR approach are demonstrated by the repeatability test and by applications to image registration and 3D reconstruction, as compared to some state-of-the-art methods. The basic idea of the main proposition in this thesis is to apply connected filters on the shape space. Such a processing is called the framework of shape-based morphology. It is a versatile framework that deals with region-based image representations. It has three main consequences. 1) For filtering purpose, it is a generalization of the existing tree-based connected operators. Indeed, the framework encompasses classical existing connected operators by attributes. Besides, It also allows us to propose two classes of novel connected operators: shape-based lower/upper levelings and shapings. 2) This framework can be used to object detection/segmentation by selecting relevant points in the shape space. 3) We can also use this framework to transform the hierarchies using the extinction values, so that a hierarchical simplification or segmentation is obtained. Some applications are developed using the framework of shape-based morphology to demonstrate its usefulness. The applications of the shape-based filtering to retinal image analysis show that a mere filtering step that we compare to more evolved processings, achieves state-of-the-art results. An efficient shaping used for image simplification is proposed by minimizing Mumford-Shah functional subordinated to the topographic map. For object detection/segmentation, we proposed a context-based energy estimator that is suitable to characterize object meaningfulness. Last, we extend the hierarchy of constrained connectivity using the aspect of hierarchy transformation of constrained connectivity using the aspect ofhierarchy transformation.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Simply connected"

1

Society, London Mathematical, ed. The homotopy category of simply connected 4-manifolds. Cambridge University Press, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Poènaru, Valentin. Equivariant, almost-arborescent representations of open simply-connected 3-manifolds: A finiteness result. American Mathematical Society, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Crockett, Stephen Robert. A semi-lagrangian discretization scheme for solving the advection-diffusion equation in two-dimensional simply connected regions. National Library of Canada, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Poenaru, Valentin. On the handles of index one of the product of an open simply-connected 3-manifold with a high-dimensional ball. Circolo matematico di Palermo, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

1963-, Rayne Carolyn, ed. The connected family: Simple steps to positive parenting. Pacific Press, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Strauss, Claudia. Talking to Alsheimer's: Simple ways to connect when you visit with a family member or friend. New Harbinger Pub., 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Simply Connected. Independently Published, 2021.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Browder, William. Surgery on Simply-Connected Manifolds. Springer London, Limited, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Bermbach, Frank. On simply-connected 7-manifolds. 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Browder, William. Surgery on Simply-Connected Manifolds. Springer, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Simply connected"

1

Bak, Joseph, and Donald J. Newman. "Simply Connected Domains." In Undergraduate Texts in Mathematics. Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7288-0_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

de la Peña, José-Antonio. "Simply Connected Algebras." In Algebra and Applications. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-12288-0_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ullrich, David. "Simply connected open sets." In Complex Made Simple. American Mathematical Society, 2008. http://dx.doi.org/10.1090/gsm/097/12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Herman, Gabor T. "Simply Connected Digital Spaces." In Geometry of Digital Spaces. Birkhäuser Boston, 1998. http://dx.doi.org/10.1007/978-1-4612-4136-2_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Stillwell, John. "Simply connected Lie groups." In Naive Lie Theory. Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-78214-0_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Shorey, Tarlok Nath. "Introduction and Simply Connected Regions." In Infosys Science Foundation Series. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9097-9_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Godement, Roger. "Simply Connected Spaces and Groups." In Universitext. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54375-8_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Gustafsson, Björn, and Yu-Lin Lin. "Global Simply Connected Weak Solutions." In Laplacian Growth on Branched Riemann Surfaces. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69863-8_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Bracci, Filippo, Manuel D. Contreras, and Santiago Díaz-Madrigal. "Hyperbolic Geometry in Simply Connected Domains." In Springer Monographs in Mathematics. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36782-4_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Puppe, V. "Simply connected manifolds without S1-symmetry." In Algebraic Topology and Transformation Groups. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/bfb0083039.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Simply connected"

1

Kotsinis, Dimitrios, and Charalampos P. Bechlioulis. "Sub-Optimal Decentralized Navigation of Multiple Holonomic Agents in Simply-Connected Workspaces." In 2024 IEEE 63rd Conference on Decision and Control (CDC). IEEE, 2024. https://doi.org/10.1109/cdc56724.2024.10886346.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Gaska, Thomas, Aaron Carpenter, and Yu Chen. "Future Avionic System Hybrid Processor Pooled Architectures." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10129.

Full text
Abstract:
Next generation avionics Size Weight and Power (SWaP) can benefit from transformational improvements and flexibility in processing brought on by Moore's Law with proper heterogeneous pooled processor solutions. It is no longer feasible to simply use a modest number of network-connected single-core processors in isolated subsystems; instead, multicore processing is the norm. By 2016-2018, there will be on-chip multicore processors with 16 or more cores on each die integrated with on-chip transformational multi-Teraflop General Purpose Graphics Processing Units (GPGPUs). Heterogeneous reprogrammable System-on-Chip (SoC) devices will include multicore processors mixed with 5 billion transistor Field Programmable Gate Arrays (FPGAs). At this time, many avionics subsystems are just beginning the integration of multicore into safe and secure systems. Similarly, sensor critical avionics systems are still adjusting their heterogeneous processing mix in multicore, FPGA, and GPGPU processing solutions. Pooled processing across subsystems is still very limited in deployment. Subsystem level partitioning and security/safety considerations often still limit the potential SWAP improvement for pooled processing if not properly planned and managed. Legacy software migration also continues to make pooled processing in tech refresh a challenge. This paper presents results of an initial investigation into relevant dual use parallels from adjacent markets with similar challenges. One of the adjacent markets that can be used for open discussion of the heterogeneous pooled processor challenge is the driverless car processor architecture. There are already developments with Teraflop computing in the glove compartment, modular multi-sensor data fusion sensor software, integrated information and infrastructure hardware security, and standards for on-platform/off-platform cloud integration. Future cars will have hardware that runs up to 100 Million lines of code. What can the avionics industry leverage from this adjacent market as it moves forward in hybrid pooled processor architectures?
APA, Harvard, Vancouver, ISO, and other styles
3

van Horck, F. B. M., A. P. J. van Deursen, P. C. T. van der Laan, and B. L. F. Paagman. "Simple Measurement of the Transfer Impedance of a Connector." In 1996_EMC-Europe_Roma. IEEE, 1996. https://doi.org/10.23919/emc.1996.10783857.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Hawking, S. W. "Wormholes and Non-simply Connected Manifolds." In Proceedings of the 7th Jerusalem Winter School for Theoretical Physics. WORLD SCIENTIFIC, 1991. http://dx.doi.org/10.1142/9789814503501_0004.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Rogier, F. "Simply Connected High-β Magnetic Configurations". У PLASMA PHYSICS: 11th International Congress on Plasma Physics: ICPP2002. AIP, 2003. http://dx.doi.org/10.1063/1.1593991.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Finke, Ulrich, and Klaus H. Hinrichs. "Overlaying simply connected planar subdivisions in linear time." In the eleventh annual symposium. ACM Press, 1995. http://dx.doi.org/10.1145/220279.220292.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Beghein, Y., R. Mitharwal, K. Cools, and F. P. Andriulli. "Spectral and algorithmic strategies for penetrable scatterers on simply and non-simply connected geometries." In 2017 International Conference on Electromagnetics in Advanced Applications (ICEAA). IEEE, 2017. http://dx.doi.org/10.1109/iceaa.2017.8065629.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Freifeld, Oren, Yixin Li, and John W. Fisher. "A fast method for inferring high-quality simply-connected superpixels." In 2015 IEEE International Conference on Image Processing (ICIP). IEEE, 2015. http://dx.doi.org/10.1109/icip.2015.7351188.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Cavalcanti, Gil R., Marisa Fernández, Vicente Muñoz, Rui Loja Fernandes, and Roger Picken. "On Non-Formality of a Simply-Connected Symplectic 8-Manifold." In GEOMETRY AND PHYSICS: XVI International Fall Workshop. AIP, 2008. http://dx.doi.org/10.1063/1.2958181.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Houmat, A., and J. R. Hutchinson. "Free Vibration of Simply Connected Bodies of Revolution by Boundary Collocation." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0213.

Full text
Abstract:
Abstract A boundary collocation method is presented for solving the problem of free vibrations of isotropic, linearly elastic simply connected bodies of revolution of arbitrary shape and arbitrary boundary conditions. The problem is formulated in terms of a series of exact solutions of the governing differential equations in spherical coordinates. Boundary conditions are satisfied at a discrete number of points on the boundary. Results are obtained for a number of simply connected bodies of revolution. For a solid sphere with stress free boundary, the results are compared with known solutions. For other shapes, the results are compared with finite element solutions obtained using ANSYS. All comparisons show that the boundary collocation method produces excellent results.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Simply connected"

1

Faisal, Muhammad Imran. Geometric Properties of Simply Connected Convex Domain. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, 2019. http://dx.doi.org/10.7546/crabs.2019.09.01.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Shchepetilov, Alexey V. Invariant Reduction of the Two-body Problem with Central Interaction on Simply Connected Spaces of Constant Sectional Curvature. GIQ, 2012. http://dx.doi.org/10.7546/giq-1-2000-229-240.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hillestad, Torgeir Martin. The Metapsychology of Evil: Main Theoretical Perspectives Causes, Consequences and Critique. University of Stavanger, 2014. http://dx.doi.org/10.31265/usps.224.

Full text
Abstract:
The purpose of this text or dissertation is to throw some basic light on a fundamental problem concerning manhood, namely the question of evil, its main sources, dynamics and importance for human attitudes and behaviour. The perspective behind the analysis itself is that of psychology. Somebody, or many, may feel at bit nervous by the word “evil” itself. It may very well be seen as too connected to religion, myth and even superstition. Yet those who are motivated to lose oneself in the subject retain a deep interest in human destructiveness, malevolence and hate, significant themes pointing at threatening prospects for mankind. The text is organized or divided into four main ordinary chapters, the three first of them organized or divided into continuous and numbered sections. A crucial point or question is of cause how to define evil itself. It can of cause be done both intentional, instrumental and by consequence. Other theorists however have stated that the concept of evil exclusively rests on a myth originated in the Judean-Christian conception of Satan and ultimate evil. This last argument presupposes evil itself as non-existent in the real rational world. It seems however a fact that most people attach certain basic meaning to the concept, mainly that it represents ultimately bad and terrible actions and behaviour directed toward common people for the purpose of bringing upon them ultimate pain and suffer. However, there is no room for essentialism here, meaning that we simply can look “inside” some original matter to get to know what it “really” is. Rather, a phenomenon gets its identity from the constituted meaning operating within a certain human communities and contexts loaded with intentionality and inter-subjective meaning. As mentioned above, the concept of evil can be interpreted both instrumental and intentional, the first being the broadest of them. Here evil stands for behaviour and human deeds having terrifying or fatal consequences for subjects and people or in general, regardless of the intentions behind. The intentional interpretation however, links the concept to certain predispositions, characteristics and even strong motives in subjects, groups and sometimes political systems and nations. I will keep in mind and clear the way for both these perspectives for the discussion in prospect. This essay represents a psychological perspective on evil, but makes it clear that a more or less complete account of such a psychological view also should include a thorough understanding or integration of some basic social and even biological assumptions. However, I consider a social psychological position of significant importance, especially because in my opinion it represents some sort of coordination of knowledge and theoretical perspectives inherent in the subject or problem itself, the main task here being to integrate perspectives of a psychological as well as social and biological kind. Since humans are essential social creatures, the way itself to present knowledge concerning the human condition, must be social of some sort and kind, however not referring to some kind of reductionism where social models of explanation possess or holds monopoly. Social and social psychological perspectives itself represents parts of the whole matter regarding understanding and explanation of human evil. The fact that humans present, or has to represent themselves as humans among other humans, means that basically a social language is required both to explain and describe human manners and ways of being. This then truly represents its own way or, more correctly, level or standard of explanation, which makes social psychology some sort of significant, though not sufficient. More substantial, the vision itself of integrating different ontological and theoretical levels and objects of science for the purpose of manifesting or make real a full-fledged psychological perspective on evil, should be considered or characterized a meta-psychological perspective. The text is partially constructed as a review of existing theories and theorists concerning the matter of evil and logically associated themes such as violence, mass murder, genocide, antisocial behaviour in general, aggression, hate and cruelty. However, the demands of making a theoretical distinction between these themes, although connected, is stressed. Above all, an integral perspective combining different scientific disciplines is aimed at.
APA, Harvard, Vancouver, ISO, and other styles
4

Sharova, Iryna. WAYS OF PROMOTING UKRANIAN PUBLISHING HOUSES ON FACEBOOK DURING QUARANTINE. Ivan Franko National University of Lviv, 2021. http://dx.doi.org/10.30970/vjo.2021.49.11076.

Full text
Abstract:
The article reviews and analyzes the promotion of Ukrainian publishing houses on Facebook during quarantine in 2020. The study’s main objective is content and its types, which were used for representing on Facebook. We found out that going live and posting a text with a picture was most popular. The phenomenon of live video is tightly connected to the quarantine phenomenon. Though, not every publishing house was able to go live permanently or at least regular. However, simple text with a picture is the most uncomplicated content to post and the most popular. Ukrainian publishers also use UGC (User Generated Content), situational content, and different contexts. The biggest problem for Ukrainian publishers is continual strategic work with social media for promotion. During quarantine, social media became the first channel for communication with customers and subscribers. Therefore promotion on the Internet and in social media indeed should become equivalent to offline promotion.
APA, Harvard, Vancouver, ISO, and other styles
5

Gowda, Manish, Walt Fehr, Andrew Balmos, et al. Economical Acquisition of Intersection Data to Facilitate CAV Operations Phase II – Implementation. Purdue University, 2024. https://doi.org/10.5703/1288284317851.

Full text
Abstract:
Cost-effective collection and distribution of intersection data are needed to facilitate traffic operations at intersections in the HDV era and particularly, in the prospective era of CAVs. Existing methods are time consuming and costly. Phase I of this research (executed under CCAT Project Nr. 71) developed a cost-effective intersection data collection and distribution device for this purpose. In Phase II of this research, the device prototype was bench tested in Lansing and field tested at Owosso. It was confirmed that the device successfully facilitates SPaT and MAP data collection and dissimulation to mobile devices. These deployments provided evidence that the device provides public agencies a way to drastically reduce the cost of data collection at their intersections. The technological innovation is that the device provided a much simpler and effective way to collect intersection data. Overall, the expectation is that reducing the costs of infrastructure data delivery will ultimately encourage more rapid deployment of infrastructure data sources. That, in turn, is expected to encourage the entire connected intelligent transportation ecosystem to advance when the potential benefits of the system become more widely available. It is anticipated that could be the start of a rapidly expanding deployment on a much larger scale.
APA, Harvard, Vancouver, ISO, and other styles
6

Lynch, James F. A Higgs Universe and the flow of time. Woods Hole Oceanographic Institution, 2024. http://dx.doi.org/10.1575/1912/69338.

Full text
Abstract:
Theoretically considering velocities greater than c implies considering an observer’s past and extends the overall analysis into the complex plane. By using a series of rotations by i in the complex plane, one can create a four-lobed structure of “instants of time,” which together with considering matter and antimatter in the lobes and the +/- sense of the rotation, leads to a Higgs field representation of space and time. A 10x10 metric is developed for this system as well as a generalized spacetime interval. It is also shown that the Friedmann Equations are consistent with our “Higgs Cosmology” if generalized to a set of coupled equations that connect the forward and backward going solutions. Simple solutions for the forward and backward going universes are presented, and are shown to be consistent with the backward solution providing both inflation and a “cosmological constant” type of dark energy, Dark matter is also discussed and is hypothesized to be due to the mass of the four “Higgs sectors” as seen through the lens of relativity by an observer in our universe. A PowerPoint presentation on this work is presented at the end of the report as a supplement.
APA, Harvard, Vancouver, ISO, and other styles
7

Lynch, James F. A digital Higgs universe and the flow of time. Woods Hole Oceanographic Institution, 2024. http://dx.doi.org/10.1575/1912/70830.

Full text
Abstract:
Theoretically considering velocities greater than c implies considering an observer’s past and extends the overall analysis into the complex plane. By using a series of rotations by i in the complex plane at the Planck scale, one can create a four-lobed structure of “instants of time,” which together with considering matter and antimatter in the lobes and the +/- sense of the rotation, leads to a Higgs field representation of spacetime. A metric is developed for this system as well as a generalized spacetime interval. It is shown that the Friedmann Equations are consistent with our “Higgs Cosmology” if generalized to a set of gravitationally coupled equations that connect the forward and backward going solutions. Simple solutions for the forward and backward going universes are presented and are shown to be consistent with the backward solution providing both inflation and a “cosmological constant” type of dark energy. Dark matter is discussed and is separately hypothesized to be due to the mass of the four “Higgs sectors” as seen by an observer in our universe. A digital, stroboscopic and holographic universe picture emerges which can also be viewed as a beginning theory of quantum gravity at the Planck scale.
APA, Harvard, Vancouver, ISO, and other styles
8

Tweet, Justin S., Vincent L. Santucci, Kenneth Convery, Jonathan Hoffman, and Laura Kirn. Channel Islands National Park: Paleontological resource inventory (public version). National Park Service, 2020. http://dx.doi.org/10.36967/nrr-2278664.

Full text
Abstract:
Channel Island National Park (CHIS), incorporating five islands off the coast of southern California (Anacapa Island, San Miguel Island, Santa Barbara Island, Santa Cruz Island, and Santa Rosa Island), has an outstanding paleontological record. The park has significant fossils dating from the Late Cretaceous to the Holocene, representing organisms of the sea, the land, and the air. Highlights include: the famous pygmy mammoths that inhabited the conjoined northern islands during the late Pleistocene; the best fossil avifauna of any National Park Service (NPS) unit; intertwined paleontological and cultural records extending into the latest Pleistocene, including Arlington Man, the oldest well-dated human known from North America; calichified “fossil forests”; records of Miocene desmostylians and sirenians, unusual sea mammals; abundant Pleistocene mollusks illustrating changes in sea level and ocean temperature; one of the most thoroughly studied records of microfossils in the NPS; and type specimens for 23 fossil taxa. Paleontological research on the islands of CHIS began in the second half of the 19th century. The first discovery of a mammoth specimen was reported in 1873. Research can be divided into four periods: 1) the few early reports from the 19th century; 2) a sustained burst of activity in the 1920s and 1930s; 3) a second burst from the 1950s into the 1970s; and 4) the modern period of activity, symbolically opened with the 1994 discovery of a nearly complete pygmy mammoth skeleton on Santa Rosa Island. The work associated with this paleontological resource inventory may be considered the beginning of a fifth period. Fossils were specifically mentioned in the 1938 proclamation establishing what was then Channel Islands National Monument, making CHIS one of 18 NPS areas for which paleontological resources are referenced in the enabling legislation. Each of the five islands of CHIS has distinct paleontological and geological records, each has some kind of fossil resources, and almost all of the sedimentary formations on the islands are fossiliferous within CHIS. Anacapa Island and Santa Barbara Island, the two smallest islands, are primarily composed of Miocene volcanic rocks interfingered with small quantities of sedimentary rock and covered with a veneer of Quaternary sediments. Santa Barbara stands apart from Anacapa because it was never part of Santarosae, the landmass that existed at times in the Pleistocene when sea level was low enough that the four northern islands were connected. San Miguel Island, Santa Cruz Island, and Santa Rosa Island have more complex geologic histories. Of these three islands, San Miguel Island has relatively simple geologic structure and few formations. Santa Cruz Island has the most varied geology of the islands, as well as the longest rock record exposed at the surface, beginning with Jurassic metamorphic and intrusive igneous rocks. The Channel Islands have been uplifted and faulted in a complex 20-million-year-long geologic episode tied to the collision of the North American and Pacific Places, the initiation of the San Andreas fault system, and the 90° clockwise rotation of the Transverse Ranges, of which the northern Channel Islands are the westernmost part. Widespread volcanic activity from about 19 to 14 million years ago is evidenced by the igneous rocks found on each island.
APA, Harvard, Vancouver, ISO, and other styles
9

Brossia. L52119 Comparative Consumption Rates of Impressed Current Cathodic Protection Anodes. Pipeline Research Council International, Inc. (PRCI), 2004. http://dx.doi.org/10.55274/r0010953.

Full text
Abstract:
There is a variety of impressed current anode materials available for onshore applications, including High Silicon Cast Iron (HSCI), Mixed Metal Oxides (MMO), graphite, platinum (or platinum coated titanium), and conductive polymers. Many end users simply select the anode material that they have experience with. What is lacking is a clear, direct comparison of relative anode consumption rates conducted under identical conditions. The present study examined the behavior of the various anode types under different current loads and soil conditions in an effort to establish baseline consumption rates under controlled conditions. Variables that were examined included soil resistivity, the presence of coke backfill, current load, and soil type (sand or 50/50 clay/sand mix). The consumption rates of the anodes evaluated decreased in the order of: AnodeFlex, HSCI, Graphite, Pt, and MMO. A survey of field experiences yielded a slightly different order in terms of anode life with Graphite and HSCI lasting the longest. However, given the wide range of anode sizes used in the various field sites, it is difficult to directly link the field results to the consumption rates measured in the laboratory. Soil composition and resistivity were not observed to have a significant influence on anode consumption rates. The presence of coke, however, led to a decrease in consumption for all anodes in some cases by as much as a factor of nearly 70. Utilizing anode cost estimates and neglecting installation costs, the life-cycle material costs for MMO and Pt anodes are much lower than the other anode materials. Furthermore, AnodeFlex was noted to be the highest cost system from a materials perspective. This may be slightly misleading since installation and replacement costs are not factored in. Given that the installation of AnodeFlex is often much easier and less expensive than the other anode types, this may prove to be a viable financial decision when the other factors are considered. ����������� The primary implications of the present study are: Despite higher material costs, MMO and Pt anodes may offer significant long-term cost savings as compared to other anode types for many applications Use of coke backfill is critical to ensure lower anode consumption rates for AnodeFlex, Graphite, and to a lesser extent HSCI; coke does not appear necessary for MMO or Pt Soil composition (sand vs. clay/sand mix) and resistivity do not appear to significantly influence anode consumption rates, thus consideration of the soil environment (except groundwater chemistry) is not needed in selection of an appropriate anode Because the influence of groundwater chemistry (as part of the soil environment) was not examined, the effects of sulfate, chloride, and pH will need to be evaluated in detail to better aid in anode material selection Field use survey responses showed a wide range in observed anode lifespan, with graphite and HSCI experiencing the longest life and cable anodes the shortest The field survey also revealed that a significant cause of anode failures was connector and cable problems
APA, Harvard, Vancouver, ISO, and other styles
10

A SURROGATE MODEL TO ESTIMATE THE AXIAL COMPRESSIVE CAPACITY OF COLD-FORMED STEEL OPEN BUILT-UP SECTIONS. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.316.

Full text
Abstract:
This paper proposed a surrogate model to simplify the process of estimating the axial compressive capacity of cold-formed steel (CFS) open built-up sections composed of lipped channels with different section sizes, thickness, length, and connector spacing. The surrogate model was developed based on the current design methods, i.e., the Effective Width Method (EWM) and Direct Strength Method (DSM), which are codified in the North American Specification AISI S100-16. This new model features two surface regression equations with a boundary inequality criteria, anchored on two important parameters, i.e., modified slenderness ratio, (KL/r)m and minimum thickness-to-width ratio (t/w)min of the built-up sections. The model was validated with 1089 sets of the experimental results data collected from previous research tested on the axial capacity of CFS open built-up sections with the different design configurations. The proposed surrogate model is aimed to simplify the design process among practising engineers for a quick preliminary calculation of the axial compressive capacity of these new CFS open built-up sections.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!