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Search Results: 1 - 10 of 6518 matches for " Alex Tserkovny "
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A t-Norm Fuzzy Logic for Approximate Reasoning  [PDF]
Alex Tserkovny
Journal of Software Engineering and Applications (JSEA) , 2017, DOI: 10.4236/jsea.2017.107035
Abstract: A t-norm fuzzy logic is presented, in which a triangular norm (t-norm) plays the role of a graduated conjunction operator. Based on this fuzzy logic we develop methods for fuzzy reasoning in which antecedents and consequents involve fuzzy conditional propositions of the form “If x is A then y is B”, with A and B being fuzzy concepts (fuzzy sets). In this study, we present a systemic approach toward fuzzy logic formalization for approximate reasoning. We examine statistical characteristics of the proposed fuzzy logic. As the matter of practical interest, we construct a set of fuzzy conditional inference rules on the basis of the proposed fuzzy logic. Important features of these rules are investigated.
A Fuzzy Logic Based Resolution Principal for Approximate Reasoning  [PDF]
Alex Tserkovny
Journal of Software Engineering and Applications (JSEA) , 2017, DOI: 10.4236/jsea.2017.1010045
Abstract: In this article, we present a systemic approach toward a fuzzy logic based formalization of an approximate reasoning methodology in a fuzzy resolution, where we derive a truth value of A from both values of B → A and B by some mechanism. For this purpose, we utilize a t-norm fuzzy logic, in which an implication operator is a root of both graduated conjunction and disjunction operators. Furthermore by using an inverse approximate reasoning, we conclude the truth value of A from both values of B → A and B, applying an altogether different mechanism. A current research is utilizing an approximate reasoning methodology, which is based on a similarity relation for a fuzzification, while similarity measure is utilized in fuzzy inference mechanism. This approach is applied to both generalized modus-ponens/modus-tollens syllogisms and is well-illustrated with artificial examples.
Qualititative Analysis of Interface Behavior under First Phase Transition  [PDF]
Alex Guskov
Journal of Crystallization Process and Technology (JCPT) , 2012, DOI: 10.4236/jcpt.2012.21005
Abstract: At present there is no explanation of the nature of interface instability upon first order phase transitions. The well-known theory of concentration overcooling under directed crystallization of solutions and Mullins-Sekerka instability cannot account for the diversified liquid component redistribution during solid state transition. In [1-3], within the framework of the nonequilibrium mass transfer problem, it has been shown that there are regimes of the interface instability, which differ from the known ones [4-6]. Moreover, the instability theory of works [1-3] demonstrates a complete experimental agreement of the dependence of eutectic pattern period on interface velocity. However, it is difficult to explain interface instability within the framework of a general setting of the mass-transfer problem. This paper is de-voted to qualitative analysis of the phenomena that are responsible for interface instability. The phenomena are connected by a single equation. Qualitative analysis revealed a variety of different conditions responsible for instability of flat interface stationary movement upon phase transition. The type of instability depends on system parameters. It is important that interface instability in the asymptotic case of quasi-equilibrium problem setting is qualitatively different from interface instability in the case of nonequilibrium problem setting.
Social Media and Political Participation: An Investigation of Small Scale Activism in Greece  [PDF]
Alex Afouxenidis
Advances in Applied Sociology (AASoci) , 2014, DOI: 10.4236/aasoci.2014.41001

This paper discusses the possibilities and limitations of online activism. The example used to illustrate the above point provides some evidence that, on some occasions, civil society maybe mobilized through the use of the internet and the online public sphere, to organize more coherent and practical political demands. At the same time, it is also shown that the capacity of individuals to fully participate depends on previous offline experiences as well as a relatively higher degree of technical competence.

On Linear Analysis of the Movement of the Interface under Directed Crystallization  [PDF]
Alex Guskov
Advances in Chemical Engineering and Science (ACES) , 2014, DOI: 10.4236/aces.2014.42014

We present a detailed discussion of the boundary conditions of the directed crystallization problem, a formulation of the model considering temperature fields of external sources, the mechanism of attachment of particles to the growing solid surface, the influence of interphase component absorption on the phase distribution ratio of the components as well as the calculation of the period of the morphological interface instability which is made with due regard of all the aforementioned conditions.

Drawing on the “Lived Experience” —An Investigation of Perception, Ideation and Praxis  [PDF]
Alex Ashton
Art and Design Review (ADR) , 2014, DOI: 10.4236/adr.2014.23007

“When we do not have the words to say something, drawing can define both the real and unreal in visual terms” (Kovats, 2007: p. 8). The paper addresses the question: what is the relationship be- tween perceptual experience and its interpretation through drawing? It is proposed that drawing, as knowledge and experience, is a particular way of coming to know the world that is explicated within artistic practice. The research examines how drawing, through its expression of the con- crete and the imaginary, provides interconnected ways of orientating knowledge that contribute to a multifaceted understanding of the “lived experience” (Dilthey, 2010). The study draws on phi- losophy, in particular the writings of Maurice Merleau-Ponty, to consider the complexities and in- terconnections of mind, object and body that are experienced through drawing. A central tenet of the research is an examination of the role of the body in constituing and explicating experience. In considering how we, as objects, are integral to the world and its phenomena, it is proposed that our “sense experience” (Sentir) (Heidegger, 1962) furnishes us with the ability to enter into this world as sensate beings; to interact, affect and engage with the world in both time and space. Mau- rice Merleau-Ponty in an essay entitled “Eye and Mind”, first published in 1961 (Johnson, 1993), contends that it is through contemplating a connection between the “seer and the seen”, in a direct reference to artist and viewer, that our experience of the world is “opened up more fully” (Johnson, 1993: p. 124). That is, by being immersed in the visible, the concrete, through the body, the visible is not appropriated, but is instead revealed by the act of “looking”. The practice of drawing is a means through which the act of looking is evinced in a tangible form. Investigating

Distance Education at the Grassroots and Assessment Procedures. The Case of the University of Cape Coast, Ghana  [PDF]
Kwao Alex
Creative Education (CE) , 2019, DOI: 10.4236/ce.2019.101006
Abstract: Distance education is an innovative learning experience which focuses on learning technology with the aim of creating human capital by using delivery of lessons from highly accredited source to the learner. At the University of Cape Coast in Ghana, individuals from diverse backgrounds and organizations embark on distance learning who under normal circumstances would not have had access to attend classes in the mainstream. The compelling need to determine their success in various centres is determined by effective assessment procedures and programme evaluation. This depends on types, structures, tools, mode of delivery and assessment records. This paper therefore examines the academic underpinnings of what precisely occurs at the University of Cape Coast. The paper instigates an inquiry to draw attention to learning outcomes of the “new” academic environment which stakeholders are benefitting from. The investigation was a case study from selected centres of the Eastern region. It adopted the mixed approach with sample selection which involved 50 students, 30 course tutors and 5 course coordinators. Semi-structured interview and group discussion were used as validation tools. Analytical processes were through sequencing and concurrent procedures using descriptive statistics and discursive method as basis for generating data. Respondents claimed that assessment procedures were superb. However, both students and course tutors complained about continuous assessment component of Teacher Made Test which is entirely ignored. The recommendation was to adopt well defined assessment and evaluation strategies.
Ambivalence and obesity stigma in decisions about weight management: A qualitative study  [PDF]
Ian Brown, Alex McClimens
Health (Health) , 2012, DOI: 10.4236/health.2012.412A224
Background: Many adults do not take up weight management interventions even after apparently deciding to do so. Further research about decision making prior to the intervention would be useful. This paper presents a qualitative study exploring the process of decision making and the influences of obesity stigma. Methods: A pragmatic qualitative methodology, conducting indepth interviews with 52 participants all with BMI > 30 kg/m2 and experience of efforts at weight management. Equal numbers of men and women with mean age 56.9 years completed interviews. Inductive analyses proceeded through systematic steps over a series of iterations. Findings: Decision making is difficult in the context of on-going mixed feelings over a long time. Thoughts and feelings become ingrained with habits and it is hard to separate out what is needed to think through a good decision. Thinking about weight brings a large volume of thoughts and feelings and apparent options or action choices. The volume of thoughts makes decisions difficult but, in the context of obesity stigma, many of the thoughts are negative. A variable sensitivity to these stigma-related thoughts adds further ambivalence and inhibition for taking deciions. The need for further thinking does not stand out in the context of the emotional resolving of thoughts about personal responsibility arising from obesity stigma. Conclusions: Obesity stigma contributes to a deeper ambivalence in the decision process and hence difficulty in decision making about weight management. Decision aid interventions and training of health care staff in communication skills for shared decision making are needed.
Optimal Approximation Algorithms for Reoptimization of Constraint Satisfaction Problems  [PDF]
Victor Alex Mikhailyuk
American Journal of Operations Research (AJOR) , 2013, DOI: 10.4236/ajor.2013.32025

The purpose of reoptimization using approximation methodsapplication of knowledge about the solution of the initial instance I, provided to achieve a better quality of approximation (approximation ratio) of an algorithm for determining optimal or close to it solutions of some “minor” changes of instance I. To solve the problem Ins-Max-EkCSP-P (reoptimization of Max-EkCSP-P with the addition of one constraint) with approximation resistant predicate P exists a polynomial threshold (optimal)\"\" -approximation algorithm,\"\" where \"\"the threshold random approximation ratio of P). When the unique games conjecture (UGC) is hold there exists a polynomial threshold (optimal) \"\"-approximation algorithm (where \"\" and \"\"the integrality gap of semidefinite relaxation of Max-EkCSP-P problem Z) to solve the problem Ins-Max-EkCSP-P.

Extracellular DNA Plays an Important Structural Role in the Biofilm of the Plastic Degrading Actinomycete Rhodo-coccus ruber  [PDF]
Irit Gilan, Alex Sivan
Advances in Microbiology (AiM) , 2013, DOI: 10.4236/aim.2013.38073

Biofilms, the preferred bacterial mode of living and survival, are employed by most microorganisms—which tend to attach to surfaces—to gain physical support, increase nutrient utilization and availability, and augment their resistance against anti-bacterial agents. Rhodococcus ruber (C208) has been shown to form a dense biofilm on polyethylene surfaces while degrading them. Bacterial biofilms comprise bacterial cells embedded in self-secreted extracellular polymeric substances (EPS) whose main components are polysaccharides, proteins and nucleic acids. Revealing the roles of these components will enable further insight into biofilm development and, therefore, the EPS structure-function relationship. The current study focuses on contribution of extracellular DNA to biofilm formation and stability. This was approached by investigating the influence of nucleases on biofilm formation via degradation of their corresponding substrates within the biofilm of C208. RNase application to cultures of C208 decreased biofilm formation. Degradation of biofilm DNA by DNase reduced early-stage biofilm formation by 20% -25% but had no significant effect on established, mature biofilm. Likewise, the addition of DNA to cultures significantly enhanced early-stage biofilm formation by 50% -100%. RAPD-PCR analysis revealed different band patterns from intra-cellular DNA and extra-cellular DNA and also between the supernatant and biofilm fractions of extra-cellular DNA, indicating that perhaps only certain DNA molecules are utilized as part of the biofilm.

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