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Examining large-scale time-use files through graphic representation
William Michelson,David Crouse
Electronic International Journal of Time Use Research , 2004,
Abstract: The objective of this paper is to demonstrate the utility of graphic means to add to the comprehension of time-use analysis. The paper traces the development of several graphic approaches, from the logic of plotting a single case in multidimensional space to several ways of examining time-use dynamics graphically without limitations on sample size. It draws on pilot studies from the FAMITEL researchproject on telecommuting and extends to Statistics Canada’s General Social Survey in 1998 with time-use data (GSS12). The examples of graphic development focus on aspects of the daily lives of teleworkers, to illustrate in this context how graphic representation can illuminate much-discussed differences between the complex pattern of daily life characterizing of these workers in comparison to conventional workers, regardless of the size of samples and subsamples. The graphic techniques discussed advance understanding of these phenomena by presenting visual evidence of differential patterns reflecting the interrelations between the several components of time-use as well as reflecting the different times in the day in which phenomena occur, within and between analytic subgroups. As in many other analyses, gender can be literally seen in the graphics as an important differentiating factor, even within occupationalsituations.
Regular Matroids with Graphic Cocircuits
Konstantinos Papalamprou,Leonidas Pitsoulis
Electronic Proceedings in Theoretical Computer Science , 2009, DOI: 10.4204/eptcs.4.4
Abstract: We introduce the notion of graphic cocircuits and show that a large class of regular matroids with graphic cocircuits belongs to the class of signed-graphic matroids. Moreover, we provide an algorithm which determines whether a cographic matroid with graphic cocircuits is signed-graphic or not.
Quasi-graphic matroids  [PDF]
Jim Geelen,Bert Gerards,Geoff Whittle
Mathematics , 2015,
Abstract: Frame matroids and lifted-graphic matroids are two interesting generalizations of graphic matroids. Here we introduce a new generalization, {\em quasi-graphic matroids}, that unifies these two existing classes. Unlike frame matroids and lifted-graphic matroids, it is easy to certify that a matroid is quasi-graphic. The main result of the paper is that every $3$-connected representable quasi-graphic matroid is either a lifted-graphic matroid or a frame matroid.
On graphic lambda calculus and the dual of the graphic beta move  [PDF]
Marius Buliga
Mathematics , 2013,
Abstract: This is a short description of graphic lambda calculus, with special emphasis on a duality suggested by the two different appearances of knot diagrams, in lambda calculus and emergent algebra sectors of the graphic lambda calculus respectively. This duality leads to the introduction of the dual of the graphic beta move. While the graphic beta move corresponds to beta reduction in untyped lambda calculus, the dual graphic beta move appears in relation to emergent algebras.
Dcm methylation is detrimental to plasmid transformation in Clostridium thermocellum
Adam M. Guss, Daniel G. Olson, Nicky C. Caiazza, Lee R. Lynd
Biotechnology for Biofuels , 2012, DOI: 10.1186/1754-6834-5-30
Abstract: We report an increase in transformation efficiency of C. thermocellum for a variety of plasmids by using DNA that has been methylated by Escherichia coli Dam but not Dcm methylases. When isolated from a dam+dcm+E. coli strain, pAMG206 transforms C. thermocellum 100-fold better than the similar plasmid pAMG205, which contains an additional Dcm methylation site in the pyrF gene. Upon removal of Dcm methylation, transformation with pAMG206 showed a four- to seven-fold increase in efficiency; however, transformation efficiency of pAMG205 increased 500-fold. Removal of the Dcm methylation site from the pAMG205 pyrF gene via silent mutation resulted in increased transformation efficiencies equivalent to that of pAMG206. Upon proper methylation, transformation efficiency of plasmids bearing the pMK3 and pB6A origins of replication increased ca. three orders of magnitude.E. coli Dcm methylation decreases transformation efficiency in C. thermocellum DSM1313. The use of properly methylated plasmid DNA should facilitate genetic manipulation of this industrially relevant bacterium.
Binary Matroids with Graphic Cocircuits  [PDF]
Konstantinos Papalamprou,Leonidas Pitsoulis
Mathematics , 2012,
Abstract: An excluded minor characterization for the class of binary signed-graphic matroids with graphic cocircuits is provided. In this report we present the necessary computations for the case analysis in the proof.
On hypercyclic convolution operators and convolution equations  [PDF]
V. V. Favaro,D. Pellegrino
Mathematics , 2015,
Abstract: We introduce a new technique that generates new examples of hypercyclic convolution operators in situations where the known techniques are not effective. We also apply this technique to prove new existence and approximation theorems for convolution equations.
Accelerating Solution Proposal of AES Using a Graphic Processor  [cached]
Advances in Electrical and Computer Engineering , 2011, DOI: 10.4316/aece.2011.04016
Abstract: The main goal of this work is to analyze the possibility of using a graphic processing unit in non graphical calculations. Graphic Processing Units are being used nowadays not only for game engines and movie encoding/decoding, but also for a vast area of applications, like Cryptography. We used the graphic processing unit as a cryptographic coprocessor in order accelerate AES algorithm. Our implementation of AES is on a GPU using CUDA architecture. The performances obtained show that the CUDA implementation can offer speedups of 11.95Gbps. The tests are conducted in two directions: running the tests on small data sizes that are located in memory and large data that are stored in files on hard drives.
Location in Mobile Networks Using Database Correlation (DCM)  [cached]
Michal Mada,Jan Duha
Advances in Electrical and Electronic Engineering , 2008,
Abstract: The article presents one of the methods of location (DCM), which is suitable for using in urban environments, where other methods are less accurate. The principle of this method is in comparison of measured samples of signal with samples stored in database. Next the article deals with methods for processing the data and other possibilities of correction of location.
Mixture Optimization by the CARSO Procedure and DCM Strategies  [PDF]
Sergio Clementi, Mauro Fernandi, Diego Decastri, Matteo Bazzurri
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.519290
Abstract: The paper illustrates a new way of using the CARSO procedure for response surfaces analyses derived from innovative experimental designs in multivariate spaces, based on Double Circulant Matrices (DCMs). We report a case study regarding a design based on a DCM for 4 variables. The final response surface model is obtained by the formerly developed CARSO method.
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