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Search Results: 1 - 10 of 9526 matches for " Steven Walczak "
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A Heuristic Text Analytic Approach for Classifying Research Articles  [PDF]
Steven Walczak, Deborah L. Kellogg
Intelligent Information Management (IIM) , 2015, DOI: 10.4236/iim.2015.71002
Abstract: Classification of research articles is fundamental to analyze and understand research literature. Underlying concepts from both text analytics and concept mining form a foundation for the development of a quantitative heuristic methodology, the Scale of Theoretical and Applied Research (STAR), for classifying research. STAR demonstrates how concept mining may be used to classify research with respect to its theoretical and applied emphases. This research reports on evaluating the STAR heuristic classifier using the Business Analytics domain, by classifying 774 Business Analytics articles from 23 journals. The results indicate that STAR effectively evaluates overall article content of journals to be consistent with the expert opinion of journal editors with regard to the research type disposition of the respective journals.
Methodological Triangulation Using Neural Networks for Business Research
Steven Walczak
Advances in Artificial Neural Systems , 2012, DOI: 10.1155/2012/517234
Abstract: Artificial neural network (ANN) modeling methods are becoming more widely used as both a research and application paradigm across a much wider variety of business, medical, engineering, and social science disciplines. The combination or triangulation of ANN methods with more traditional methods can facilitate the development of high-quality research models and also improve output performance for real world applications. Prior methodological triangulation that utilizes ANNs is reviewed and a new triangulation of ANNs with structural equation modeling and cluster analysis for predicting an individual's computer self-efficacy (CSE) is shown to empirically analyze the effect of methodological triangulation, at least for this specific information systems research case. A new construct, engagement, is identified as a necessary component of CSE models and the subsequent triangulated ANN models are able to achieve an 84% CSE group prediction accuracy. 1. Introduction Artificial Neural networks (ANNs) have been used as a popular research and implementation paradigm in multiple domains for several decades now [1–9]. Recent literature is advocating the further usage of ANNs as a research methodology, especially in previously untried or underutilized domains [10, 11]. However, due to the early premise that ANNs are black boxes (i.e., it is difficult to evaluate the contribution of the independent variables) the demonstration of rigor and generalization of results from neural network research has been problematic. Similarities between ANNs and various statistical methods (which have been shown to be both rigorous and generalizable) have been described for potential adopters [10, 12]. A common research paradigm for ANN researchers is to compare results obtained using an ANN to other more traditional statistical methods, including regression [13–16], discriminant analysis [17–21], other statistical methods [22–24], and multiple statistical methods [25–28]. Of the 16 articles just referenced, the majority of these results show ANNs being either similar to (with 2 being similar) or better than (with 12 outperforming) the compared statistical methods within the specific application domain. While ANNs have a history, though short, their black box nature has led to adoption resistance by numerous-business related disciplines [29]. Methodological triangulation may help to overcome these adoption and usage reservations as well as providing a means for improving the overall efficacy of ANN applications. Methodological triangulation is the utilization of multiple methods on
Factors Influencing Corporate Online Identity: A New Paradigm
Walczak,Steven; Gregg,Dawn G;
Journal of theoretical and applied electronic commerce research , 2009, DOI: 10.4067/S0718-18762009000300003
Abstract: electronic commerce research has shown that a very wide variety of factors such as website quality and vendor reputation influence consumer behaviors and outcomes. these behaviors and outcomes include: trust, intention to transact, and return visits. however, these factors are typically studied in isolation and often show conflicting results. this paper proposes a unifying model of online identity (or e-image) that combines the various factors that influence user perceptions of an e-business. survey results support the importance of a wide variety of e-image factors when forming impressions online and show that while information content is the foremost concern for most users, the importance of other factors varies depending on the role of the user in establishing a relationship with the owner of the online identity.
De Sitter Space as a Computational Tool for Surfaces and Foliations  [PDF]
Maciej Czarnecki, Szymon Walczak
American Journal of Computational Mathematics (AJCM) , 2013, DOI: 10.4236/ajcm.2013.31A001

The set of all spheres and hyperplanes in the Euclidean space Rn+1 could be identified with the Sitter space Λn+1. All the conformal properties are invariant by the Lorentz form which is natural pseudo-Riemannian metric on Λn+1. We shall study behaviour of some surfaces and foliations as their families using computation in the de Sitter space.

Z. Walczak
Abstract: . We introduce certain positive linear operators in weighted spaces of functions of two variables and we study approximation properties of these operators. We give theorems on the degree of approximation of functions from polynomial and exponential weighted spaces by introduced operators, using norms of these spaces.
Ograniczenie spo ycia t uszczu - profilaktyka pierwotna mia d ycy u dzieci
Alina Walczak
Pediatria Wspó?czesna , 2001,
Abstract: Choroby uk adu sercowo-naczyniowego s g ówn przyczyn zgonów ludzi doros ych w Polsce. Mia d ycy i jej nast pstwom mo na zapobiega , zwalczaj c czynniki t)[2yYand w profilaktyce pierwotnej. Wiadomo, e mia d yca rozwija si ju w dzieciństwie. Badania autopsyjne wykazuj , e wczesne zmiany ateroma-tyczne s wykrywane ju w I dekadzie ycia. Bardzo wa nym badaniem, oceniaj cym zale no mi dzy czynnikami ryzyka (hipercholesterolemi , oty o ci , nadci nieniem t tniczym, cukrzyc , paleniem papierosów) a wyst powaniem zmian mia d ycowych u m odych osób, by a opublikowana w 1998 r. wieloo rod-kowa próba PathobiologicalDeterminants of Atherosclerosis in Youth. Przebadano sekcyjnie 2876 osób w wieku 15-34 lat, które zmar y z przyczyn zewn trznych (zabójstwa, wypadki, samobójstwa). Stwierdzono, e obecno czynników ryzyka przyspiesza rozwój mia d ycy u nastolatków, a jej objawy nasilaj si u m odych doros ych, 20-30 lat przed klinicznymi objawami choroby niedokrwiennej serca. Wyniki licznych badań klinicznych dowodz , e modyfikacja czynników ryzyka zmniejsza miertelno z powodu choroby niedokrwiennej serca. G ównym czynnikiem ywieniowym, wp ywaj cym na st enie cholesterolu ca kowitego i LDL-cholesterolu w surowicy krwi, jest spo ycie nasyconych kwasów t uszczowych.
Wgl d jako element dynamicznej struktury poznania (na podstawie "Insight" Bernarda Lonergana) [Insight as a Component of the Dynamic Structure of Knowing (on the basis of Insight by Bernard Lonergan)]
Monika Walczak
Analiza i Egzystencja , 2009,
Abstract: This paper presents a version of a defense of the epistemic significance of insight (as a kind of intuition) in the process of human knowing. The position of Bernard Lonergan (1904-1984) laid out in Insight: A Study of Human Understanding (1957) is discussed. The relations between insight and the basic cognitional activities are analyzed. The analysis answers the question of the epistemic functions of insight in the process of acquiring knowledge. Insight accompanies all cognitional activities. In particular, it is essential in those activities that are crucial from the point of view of knowledge generation and evaluation. The way that insight functions as a component of central cognitional activities - for example in generalization and justification - allows us to argue that it is an essential and indispensable element of knowing. The paper consists of six sections: 1. Preliminary remarks; 2. The cognitional process as the object of study for cognitional theory; 3. The notion of insight and its properties; 4. The dynamic structure of knowing; 5. Functions of insight in the cognitional process - (a) the level of experience (b) the level of intelligence (c) the level of judgment. 6. Final remarks.
Edito #8
Dorota Walczak
Slavica Bruxellensia : Revue Polyphonique de Littérature, Culture et Histoire Slaves , 2012, DOI: 10.4000/slavica.1199
Abstract: Depuis l’antique Athènes, émigration et exil constituent deux termes qui, par leur nature même, entrent en dialogue avec deux autres, tout aussi importants : la démocratie et la citoyenneté . Ainsi, l’histoire de l’humanité semble-t-elle aussi se partager entre deux p les : les droits de l’homme d'une part et d'autre part l'atteinte permanente à cette évidence que l'on pourrait considérer comme la norme élémentaire de la vie de tout un chacun, le droit de vivre dans le pays de ...
Savourez Ocalone w t umaczeniu de Stanis aw Barańczak
Dorota Walczak
Slavica Bruxellensia : Revue Polyphonique de Littérature, Culture et Histoire Slaves , 2009, DOI: 10.4000/slavica.165
Abstract: Que je me réjouis de voir la nouvelle édition du mois de janvier, la quatrième si je compte bien (les précédentes datent de 1992, 1994 et 2004), une édition encore plus belle et plus soignée d’un livre qui mérite une place bien visible sur les étagères des bibliothèques professorales, estudiantines, poétiques . Et éclectiques aussi… Parce qu’il s’agit d’un des ouvrages les plus importants du richissime curriculum vitae de Stanis aw Barańczak (né en 1946 à Poznań), autrement dit d’un auteur...
Edito #1
Dorota Walczak
Slavica Bruxellensia : Revue Polyphonique de Littérature, Culture et Histoire Slaves , 2008,
Abstract: Ne cherchez pas en vous, en vous il n’y a rien ; cherchez dans l’autre qui est en face de vous -avait coutume de dire à ses acteurs, sans crainte de déplaire, le célèbre réformateur russe du théatre Konstantin Stanislavskij (1863-1938). En pla ant l’acteur face au miroir, face au personnage qu’il devait incarner et face au public, dans un répertoire d’auteurs si différents que ekhov, Shakespeare ou Molière, ce dramaturge exceptionnel multipliait savamment les divers c tés de cet autre qu...
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