Search results for "Information Systems"
showing 10 items of 1926 documents
Drugs and Nondrugs: An Effective Discrimination with Topological Methods and Artificial Neural Networks
2003
A set of topological and structural descriptors has been used to discriminate general pharmacological activity. To that end, we selected a group of molecules with proven pharmacological activity including different therapeutic categories, and another molecule group without any activity. As a method for pharmacological activity discrimination, an artificial neural network was used, dividing molecules into active and inactive, to train the network and externally validate it. The following plot frequency distribution diagrams were used: a function of the number of drugs within a value interval, and the output value of the neural network versus these values. Pharmacological distribution diagram…
The problem and the solution of accounting in a text
1993
Abstract An interpretative reading of accounting texts published in management accounting journals is offered. The selected articles were read many times, but the phenomenological hermeneutic description is developed through a process of “three readings.” The first reading proposes that the texts share a pattern of preach: They start with an introduction, describe a failing accounting, and remind the reader that through change, better accounting is achievable. In the second reading it is noticed, however, that the idea of “defining a problem and finding a solution with the help of accounting” receives a very different expression in different articles. Consequently, the third reading suggest…
Sobre verdad, mentira y posverdad. Elementos para una filosofía de la información
2020
El problema de la “verdad” es uno de los más presentes en la comunicación desde los orígenes de la prensa y uno de los nucleares de la filosofía desde sus comienzos. En la actualidad, este asunto sigue latente en los medios de comunicación, incluso tras los cambios acaecidos con los nuevos dilemas abiertos por los cambios tecnológico-productivos. Estos dilemas están a menudo relacionados con la importancia que ha adquirido la opinión pública en nuestras democracias insertas en un mundo globalizado. Dado el peso de la opinión publicada, vemos necesario revisar, desde un planteamiento de lo que denominamos filosofía de la información periodística, los conceptos de verdad y mentira en sentido …
Reconsidering the Role of Research Method Guidelines for Qualitative, Mixed-methods, and Design Science Research
2019
Guidelines for different qualitative research genres have been proposed in information systems (IS). As these guidelines are outlined for conducting and evaluating good research, studies may be denied publication simply because they do not follow a prescribed methodology. This can result in “checkbox” compliance, where the guidelines become more important than the study. We argue that guidelines can only be used to evaluate what good research is if there is evidence that they lead to certain good research outcomes. Currently, the guidelines do not present such evidence. Instead, when it is presented, the evidence is often an authority argument or evidence of popularity with usability exampl…
A framework for sign language sentence recognition by common sense context
2007
This correspondence proposes a complete framework for sign language recognition that integrates a commonsense engine in order to deal with sentence recognition. The proposed system is based on a multilevel architecture that allows modeling and managing of the knowledge of the recognition process in a simple and robust way. The final abstraction level of this architecture introduces the semantic context and the analysis of the correctness of a sentence given in a sequence of recognized signs. Experimentations are presented using a set of signs from the Italian sign language (LIS) for domotic applications. The implemented system maintains a high recognition rate when the set of signs grows, c…
Fingerprint classification based on deep learning approaches: Experimental findings and comparisons
2021
Biometric classification plays a key role in fingerprint characterization, especially in the identification process. In fact, reducing the number of comparisons in biometric recognition systems is essential when dealing with large-scale databases. The classification of fingerprints aims to achieve this target by splitting fingerprints into different categories. The general approach of fingerprint classification requires pre-processing techniques that are usually computationally expensive. Deep Learning is emerging as the leading field that has been successfully applied to many areas, such as image processing. This work shows the performance of pre-trained Convolutional Neural Networks (CNNs…
Rotational Motion of Linear Molecules in Three Dimensions. A Path-Integral Monte Carlo Approach
1994
Abstract A path-integral Monte Carlo (PIMC) simulation method for the rotational motion of linear molecules in three dimensions is presented. The technique is applied to an H2 impurity in a static crystal-field. The resulting orientational distributions from quantum and classical simulations are obtained and discussed. The algorithm suffers from the “sign problem” of quantum simulations. However, as can be seen by comparing the low temperature simulation result to the variational solution of the Schrodinger equation, the PIMC method captures the quantum fluctuations.
A Chemical Index Inspired by Biological Plastic Evolution: Valence-Isoelectronic Series of Aromatics
2004
Plastic evolution is a new perspective of the evolutionary process conjugating the effect, on one hand, of the acquired characters and, on the other, of the relationships that emerge among the principle of evolutionary indeterminacy, the principle of morphologic determination, and natural selection. Plastic evolution is applied to design the coordination index Ic. Ic is used to characterize the valence-isoelectronic series of cyclopentadiene, benzene, toluene, and styrene and compared to charge indices for dipole moment. The parameters needed to calculate Ic are minus the standard enthalpy of formation T, molecular surface area S, and molecular weight W. With the exception of the O heteromo…
Linear-scaling self-consistent field theory based molecular dynamics: application to C60buckyballs colliding with graphite
2018
In this work, we investigate the collision of a C fullerene with graphite using large-scale molecular dynamics simulations, where the interatomic forces are computed ‘on-the-fly’ by means of self-c...
Usability of Programming Languages
2016
Programming languages form the interface between programmers (the users) and the computation that they desire the computer to execute. Although studies exist for some aspects of programming language design (such as conditionals), other aspects have received little or no human factors evaluations. Designers thus have little they can rely on if they want to make new languages highly usable, and users cannot easily chose a language based on usability criteria. This SIG will bring together researchers and practitioners interested in increasing the depth and breadth of studies on the usability of programming languages, and ultimately in improving the usability of future languages. nonPeerReviewed