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Search Results: 1 - 10 of 325586 matches for " S. Kowalski "
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The communications model of using social network by sports clubs
S. Kowalski
Marketing ì Mened?ment Innovacìj , 2012,
Abstract: This article presents a model of marketing communications using social network by sports clubs. It presents the links between the sports club and its environment and uses of the Internet to promote it. The model of communication is composed of the elements responsible for the success of marketing in the web. Article also includes recommendations for using the model in practice.
Enhancing Curiosity Using Interactive Simulations Combined with Real-Time Formative Assessment Facilitated by Open-Format Questions on Tablet Computers
F. V. Kowalski,S. E. Kowalski
Physics , 2013,
Abstract: Students' curiosity often seems nearly nonexistent in a lecture setting; we discuss a variety of possible reasons for this, but it is the instructor who typically poses questions while only a few students, usually the better ones, respond. As we have developed and implemented the use of InkSurvey to collect real-time formative assessment, we have discovered that it can serve in an unanticipated role: to promote curiosity in engineering physics undergraduates. Curiosity often motivates creative, innovative people. To encourage such curiosity, we solicit questions submitted real-time via InkSurvey and pen-enabled mobile devices (Tablet PCs) in response to interactive simulations (applets) run either before or in class. This provides students with practice in asking questions, increases metacognition, and serves as a rich springboard from which to introduce content and/or address misconceptions. We describe the procedure for measuring curiosity and results from applying this method in a junior level electromagnetics engineering physics course. We conclude that students are indeed more curious than they appear in class, and students participate even without extrinsic motivation. This method of enhancing curiosity using interactive simulations coupled with real-time formative assessment in response to open-format questions could be implemented in a wide variety of science and engineering courses as well as elsewhere.
The Effect of Student Learning Styles on the Learning Gains Achieved When Interactive Simulations Are Coupled with Real-Time Formative Assessment via Pen-Enabled Mobile Technology
F. V. Kowalski,S. E. Kowalski
Physics , 2013,
Abstract: This paper describes results from a project in an undergraduate engineering physics course that coupled classroom use of interactive computer simulations with the collection of real-time formative assessment using pen-enabled mobile technology. Interactive simulations (free or textbook-based) are widely used across the undergraduate science and engineering curriculia to help actively engaged students increase their understanding of abstract concepts or phenomena which are not directly or easily observable. However, there are indications in the literature that we do not yet know the pedagogical best practices associated with their use to maximize learning. This project couples student use of interactive simulations with the gathering of real-time formative assessment via pen-enabled mobile technology (in this case, Tablet PCs). The research question addressed in this paper is: are learning gains achieved with this coupled model greater for certain types of learners in undergraduate STEM classrooms? To answer this, we correlate learning gains with various learning styles, as identified using the Index of Learning Styles (ILS) developed by Felder and Soloman. These insights will be useful for others who use interactive computer simulations in their instruction and other adopters of this pedagogical model; the insights may have broader implications about modification of instruction to address various learning styles.
Doubly Special Relativity theories as different bases of $κ$--Poincaré algebra
J. Kowalski-Glikman,S. Nowak
Physics , 2002, DOI: 10.1016/S0370-2693(02)02063-4
Abstract: Doubly Special Relativity (DSR) theory is a theory with two observer-independent scales, of velocity and mass (or length). Such a theory has been proposed by Amelino--Camelia as a kinematic structure which may underline quantum theory of relativity. Recently another theory of this kind has been proposed by Magueijo and Smolin. In this paper we show that both these theories can be understood as particular bases of the $\kappa$--Poincar\'e theory based on quantum (Hopf) algebra. This observation makes it possible to construct the space-time sector of Magueijo and Smolin DSR. We also show how this construction can be extended to the whole class of DSRs. It turns out that for all such theories the structure of space-time commutators is the same. This results lead us to the claim that physical predictions of properly defined DSR theory should be independent of the choice of basis.
The Free-Free Opacity in Warm, Dense, and Weakly Ionized Helium
P. M. Kowalski,S. Mazevet,D. Saumon
Physics , 2005, DOI: 10.1063/1.2263280
Abstract: We investigate the ionization and the opacity of warm, dense helium under conditions found in the atmospheres of cool white dwarf stars. Our particular interest is in densities up to $\rm 3 g/cm^{3}$ and temperatures from 1000K to 10000K. For these physical conditions various approaches for modeling the ionization equilibrium predict ionization fractions that differ by orders of magnitudes. Furthermore, estimates of the density at which helium pressure-ionizes vary from $\rm 0.3$ to $\rm 14 g/cm^{3}$. In this context, the value of the electron-atom inverse bremsstrahlung absorption is highly uncertain. We present new results obtained from a non-ideal chemical model for the ionization equilibrium, from Quantum Molecular Dynamics (QMD) simulations, and from the analysis of experimental data to better understand the ionization fraction in fluid helium in the weak ionization limit.
Technology-Enabled Nurturing of Creativity and Innovation: A Specific Illustration from an Undergraduate Engineering Physics Course
F. V. Kowalski,S. E. Kowalski,P. B. Kohl,V. H. Kuo
Physics , 2013,
Abstract: There is general agreement that creativity and innovation are desirable traits in the toolbox of 21\textsuperscript{st} century engineers, as well as in the future workforce in general. However, there is a dearth of exemplars, pedagogical models, or best practices to be implemented in undergraduate engineering education to develop and nurture those talents. In this paper, we use a specific example of a classroom activity from a course designed to help bridge the transition from learning the fundamental principles of engineering physics in introductory courses to being able to creatively and innovatively apply them in more advanced settings, such as senior capstone projects and on-the-job challenges in the future workplace. Application of techniques for generating and evaluating ideas are described. To enhance the benefits of group creativity and facilitate real-time electronic brainstorming in the classroom, we use InkSurvey with pen-enabled mobile computing devices (iPads, tablet PCs, Android devices, etc.). Using this free, web-based software in this setting effectively mitigates many of the social issues that typically plague brainstorming in a group setting. The focus, instead, is on paying attention to the ideas of others while encouraging fluency, originality, and honing positive critical thinking skills. This emphasis is reflected as the group creates a metric to evaluate their potential solutions. A specific case from undergraduate and graduate level engineering physics courses is described to illustrate how the extensive work done in this arena in psychology, marketing, and business environments can be applied to STEM education. The classroom process is outlined and actual student results are presented to illustrate the method for other instructors who might be interested in employing similar activities in a non-threatening, low-stakes learning environment.
On the Quadratic Transportation Problem  [PDF]
Veena Adlakha, Krzysztof Kowalski
Open Journal of Optimization (OJOp) , 2013, DOI: 10.4236/ojop.2013.23012

We present a direct analytical algorithm for solving transportation problems with quadratic function cost coefficients. The algorithm uses the concept of absolute points developed by the authors in earlier works. The versatility of the proposed algorithm is evidenced by the fact that quadratic functions are often used as approximations for other functions, as in, for example, regression analysis. As compared with the earlier international methods for quadratic transportation problem (QTP) which are based on the Lagrangian relaxation approach, the proposed algorithm helps to understand the structure of the QTP better and can guide in managerial decisions. We present a numerical example to illustrate the application of the proposed method.

Seropositividad a Coxiella burnetii en cabras de la parroquia Trinidad Samuel del municipio Torres, estado Lara, Venezuela
Oropeza,Mariangel; Dickson,Luis; Maldonado,Jesús; Kowalski,Andrés;
Zootecnia Tropical , 2010,
Abstract: in order to dismiss coxiella burnetti as a possible etiologic agent responsible of the high percentage of abortion and kids born weak reported by traditional goat farmers of three sectors of the trinidad samuel county of the torres municipality of lara state of venezuela, samples of 315 animals were taken from a total 924 goats belonging to 7 herds with a history of high percentage of abortions. samples were analyzed through elisa indirect method using idexx laboratory kit. results showed that 191 (60,63%) of samples were seropositive to c. burnetti. statical diference (p<0,05) was found for three sector under study, villa araure 67,7 %; sabana grande 68,2% y los aranguez. 32,6%. seropositivity was high if compared to found in literature and could be the cause of abortions and weak kids reported by goat farmers. a more profound study is necessary to determine seroprevalence in goat producing zones of the state.
Method of Moments of Coupled-Cluster Equations: Externally Corrected Approaches Employing Configuration Interaction Wave Functions
Piotr Piecuch,Karol Kowalski,Ian S.O. Pimienta
International Journal of Molecular Sciences , 2002, DOI: 10.3390/i3050475
Abstract: A new approach to the many-electron correlation problem, termed the method of moments of coupled-cluster equations (MMCC), is further developed and tested. The main idea of the MMCC theory is that of the noniterative energy corrections which, when added to the energies obtained in the standard coupled-cluster calculations, recover the exact (full configuration interaction) energy. The MMCC approximations require that a guess is provided for the electronic wave function of interest. The idea of using simple estimates of the wave function, provided by the inexpensive configuration interaction (CI) methods employing small sets of active orbitals to define higher–than–double excitations, is tested in this work. The CI-corrected MMCC methods are used to study the single bond breaking in HF and the simultaneous breaking of both O–H bonds in H2O.
Stem cell factor and its soluble receptor (c-kit) in serum of asthmatic patients- correlation with disease severity
Joanna S Makowska, Malgorzata Cieslak, Marek L Kowalski
BMC Pulmonary Medicine , 2009, DOI: 10.1186/1471-2466-9-27
Abstract: The study involved 107 patients with bronchial asthma, well characterized with respect to severity and 21 healthy controls. Concentration of SCF and sc-kit in the patients serum were measured by ELISA method.Mean serum SCF level in the group of asthmatics (n = 88) was significantly higher as compared to healthy controls (1010 pg/ml ± 37 vs 799 ± 33; p < 0,001). The level of SCF was higher in patients with severe asthma as compared to patients with non-severe asthma (1054 +/- 41 pg/ml vs 819 +/- 50; p < 0,01) and correlated with dose of inhaled glucocorticosteroids taken by the patients to achieve asthma control (R = 0,28; p < 0,01). The mean sc-kit serum level did not differ between asthmatic patients and healthy controls, however the level of sc-kit in non-severe asthmatics was significantly higher as compared to patients with severe asthma and healthy controls. In asthmatic patients (n = 63) the level of sc-kit correlated positively with FEV1% predicted value (R = 0,45; p < 0,001) and MEF25% predicted value (R = 0,33; p < 0,01). The level of sc-kit inversely correlated with the dose of inhaled glucocorticosteroids taken by the patients (R = -0,26; p < 0,01).Serum levels of SCF and its soluble receptor c-kit seem to be reflect asthma severity suggesting a role for these molecules in asthmatic inflammation.Hemopoietic cytokines play a crucial role in the activation and survival of cells involved in asthmatic inflammation. Stem cell factor (SCF)- the c-kit ligand, although initially was described as a mast cell growth factor [1] appeared to be a pleiotropic cytokine exerting its role at the first stages of bone marrow stem cells development [2], inducing eosinophil activation [3] and basophil chemotaxis and survival [4].As mast cells and eosinophils are key cells in the inflammatory process ongoing in the airways of patients with asthma the role of SCF in this disease has been studied. The expression of mRNA for SCF and its receptor c-kit were shown to be higher in t
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