2,310 research outputs found
Disconnected Skeleton: Shape at its Absolute Scale
We present a new skeletal representation along with a matching framework to
address the deformable shape recognition problem. The disconnectedness arises
as a result of excessive regularization that we use to describe a shape at an
attainably coarse scale. Our motivation is to rely on the stable properties of
the shape instead of inaccurately measured secondary details. The new
representation does not suffer from the common instability problems of
traditional connected skeletons, and the matching process gives quite
successful results on a diverse database of 2D shapes. An important difference
of our approach from the conventional use of the skeleton is that we replace
the local coordinate frame with a global Euclidean frame supported by
additional mechanisms to handle articulations and local boundary deformations.
As a result, we can produce descriptions that are sensitive to any combination
of changes in scale, position, orientation and articulation, as well as
invariant ones.Comment: The work excluding {\S}V and {\S}VI has first appeared in 2005 ICCV:
Aslan, C., Tari, S.: An Axis-Based Representation for Recognition. In
ICCV(2005) 1339- 1346.; Aslan, C., : Disconnected Skeletons for Shape
Recognition. Masters thesis, Department of Computer Engineering, Middle East
Technical University, May 200
Book Review: the Factors Effecting Student Achievement: Meta-Analysis of Empirical Studies
No abstract for book review
Synthesis, Characterization and Antibacterial Activity of Imidazole Derivatives of 1,10-Phenanthroline and their Cu(II), Co(II) and Ni(II) Complexes
Six new CuL1 (L1 = 4-bromo-2-(1H-imidazo[4,5-f][1,10]phenanthroline-2-yl)phenol), CoL1, NiL1, CuL2 (L2 = 2-(1H-imidazo[4,5-f] [1,10]phenanthroline-2-yl)-5-methoxyphenol), CoL2 and NiL2 complexes were synthesized. L1 and L2 ligands were prepared by the condensation of 1,10-phenanthroline-5,6-dione with 5-bromosalicylaldehyde and 2-hydroxy-4-methoxybenzaldehyde, respectively. The structures of the compounds were determined by elemental analyses, IR,UV-visible, 1H-NMR, TGA, magnetic susceptibilities and molar conductance measurements. It is observed that the synthesized complexes have tetragonal and distorted square pyramidal geometrical structures. Antibacterial activity of the ligands and their metal complexes were tested against selected bacteria by disc diffusion method.KEY WORDS 1,10-Phenanthroline, imidazole, complex, antibacterial activity
Evolved model for early fault detection and health tracking in marine diesel engine by means of machine learning techniques
The Coast Guard Command, which has a wide range of duties as saving human lives, protecting natural resources, preventing marine pollution and battle against smuggling, uses diesel main engines in its ships, as in other military and commercial ships. It is critical that the main engines operate smoothly at all times so that they can respond quickly while performing their duties, thus enabling fast and early detection of faults and preventing failures that are costly or take longer to repair. The aim of this study is to create and to develop a model based on current data, to select machine learning algorithms and ensemble methods, to develop and explain the most appropriate model for fast and accurate detection of malfunctions that may occur in 4-stroke high-speed diesel engines. Thus, it is aimed to be an exemplary study for a data-based decision support mechanism
Finding the Hierarchy of Dense Subgraphs using Nucleus Decompositions
Finding dense substructures in a graph is a fundamental graph mining
operation, with applications in bioinformatics, social networks, and
visualization to name a few. Yet most standard formulations of this problem
(like clique, quasiclique, k-densest subgraph) are NP-hard. Furthermore, the
goal is rarely to find the "true optimum", but to identify many (if not all)
dense substructures, understand their distribution in the graph, and ideally
determine relationships among them. Current dense subgraph finding algorithms
usually optimize some objective, and only find a few such subgraphs without
providing any structural relations. We define the nucleus decomposition of a
graph, which represents the graph as a forest of nuclei. Each nucleus is a
subgraph where smaller cliques are present in many larger cliques. The forest
of nuclei is a hierarchy by containment, where the edge density increases as we
proceed towards leaf nuclei. Sibling nuclei can have limited intersections,
which enables discovering overlapping dense subgraphs. With the right
parameters, the nucleus decomposition generalizes the classic notions of
k-cores and k-truss decompositions. We give provably efficient algorithms for
nucleus decompositions, and empirically evaluate their behavior in a variety of
real graphs. The tree of nuclei consistently gives a global, hierarchical
snapshot of dense substructures, and outputs dense subgraphs of higher quality
than other state-of-the-art solutions. Our algorithm can process graphs with
tens of millions of edges in less than an hour
Ottomentality: neoliberal governance of culture and neo-ottoman management of diversity
This essay proposes an alternative concept–Ottomentality–in order to more adequately assess Turkey’s growing neo-Ottoman cultural ensemble. This concept is deployed here to underscore the convergence of neoliberal and neo-Ottoman rationalities and the discursive practices that are developed around them for governing culture and managing a diverse society. The essay contends that the convergence of these two rationalities has significantly transformed the state’s approach to culture as a way of governing the social, constituted a particular knowledge of multiculturalism, and a subject of citizenry increasingly subjected to exclusion and discipline for expressing critical views of this knowledge. © 2017 Informa UK Limited, trading as Taylor & Francis Group
Multi-Temperature Zone, Droplet-based Microreactor for Increased Temperature Control in Nanoparticle Synthesis
Cataloged from PDF version of article.Microreactors are an emerging technology for the controlled synthesis of nanoparticles. The Multi-Temperature zone Microreactor (MTM) described in this work utilizes thermally isolated heated and cooled regions for the purpose of separating nucleation and growth processes as well as to provide a platform for a systematic study on the effect of reaction conditions on nanoparticle synthesis. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Modeling Stable Matching Problems with Answer Set Programming
The Stable Marriage Problem (SMP) is a well-known matching problem first
introduced and solved by Gale and Shapley (1962). Several variants and
extensions to this problem have since been investigated to cover a wider set of
applications. Each time a new variant is considered, however, a new algorithm
needs to be developed and implemented. As an alternative, in this paper we
propose an encoding of the SMP using Answer Set Programming (ASP). Our encoding
can easily be extended and adapted to the needs of specific applications. As an
illustration we show how stable matchings can be found when individuals may
designate unacceptable partners and ties between preferences are allowed.
Subsequently, we show how our ASP based encoding naturally allows us to select
specific stable matchings which are optimal according to a given criterion.
Each time, we can rely on generic and efficient off-the-shelf answer set
solvers to find (optimal) stable matchings.Comment: 26 page
Surface integral equations for material layers modeled with tensor boundary conditions
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94933/1/rds4585.pd
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