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Search Results: 1 - 10 of 84437 matches for " W?odzimierz Wroblewski "
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Numerical Modelling of Aerodynamic Noise in Compressible Flows  [PDF]
S?awomir Dykas, Sebastian Rulik, Wodzimierz Wroblewski
Open Journal of Fluid Dynamics (OJFD) , 2012, DOI: 10.4236/ojfd.2012.23007
Abstract: The solution of the AeroAcoustics (CAA) problems by means of the Direct Numerical Simulation (DNS) or even the Large Eddy Simulation (LES) for a large computational domain is very time consuming and cannot be applied widely for engineering applications. In this paper the in-house CFD and CAA codes are presented. The in-house CFD code is based on the LES approach whereas the CAA code is an acoustic postprocessor solving the non-linearized Euler equations for fluctuating (acoustic) variables. These codes are used to solve the aerodynamically generated sound field by a flow over a rectangular cavity with inlet Mach number 0.53.
Optimal Aerations in the Inverse Fluidized Bed Biofilm Reactor When Used in Treatment of Industrial Wastewaters of Various Strength  [PDF]
Wodzimierz Sokó?
Advances in Chemical Engineering and Science (ACES) , 2012, DOI: 10.4236/aces.2012.23046
Abstract: The aim of this work was the determination of the optimal aerations, and more specifically the corresponding optimal air velocities uopt, at which the largest COD removals were achieved in treatment of industrial wastewaters of various strength conducted in the inverse fluidized bed biofilm reactor. The largest COD removals were achieved at the following air velocities uopt and retention times ts, and (Vb/VR) = 0.55: i) for CODo = 72,780 mg/l at uopt = 0.052 m/s and ts = 80 h ; ii) for CODo = 62,070 mg/l at uopt = 0.042 m/s and ts = 65 h; iii) for CODo = 49,130 mg/l at uopt = 0.033 m/s and ts= 55 h ; iv) for CODo = 41,170 mg/l at uopt = 0.028 m/s and ts = 45 h; v) for CODo = 35,460 mg/l at uopt = 0.025 m/s and ts = 27.5 h; and vi) for CODo = 26,470 mg/l at uopt= 0.014 m/s and ts = 22.5 h. In the treatment operation conducted in a reactor optimally controlled at the above values of uopt, ts and (Vb/VR), the following decreases in COD were obtained: i) from 72,780 to 5410 mg/l; ii) from 62,070 to 3730 mg/l; iii) from 49,130 to 2820 mg/l; iv) from 41,170 to 1820 mg/l; v) from 35,460 to 1600 mg/l; and vi) from 26,470 to 1180 mg/l, that is, approximately a 93%, 94%, 95%, 96%, 95% and 96% COD reduction was attained, respectively.
Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters  [PDF]
Wodzimierz Sokó?, Belay Woldeyes
Advances in Chemical Engineering and Science (ACES) , 2011, DOI: 10.4236/aces.2011.14034
Abstract: The aim of this work was to investigate the aerobic degradation of high-strength industrial (refinery) wastewaters in the inverse fluidized bed biological reactor, in which polypropylene particles of density 910 kg/m3 were fluidized by an upward flow of gas through a bed. Measurements of chemical oxygen demand (COD) versus residence time t were performed for various ratios of settled bed volume to reactor volume (Vb/VR) and air velocities u. The largest COD reduction, namely, from 54,840 to 2,190 mg/l, i.e. a 96% COD decrease, was achieved when the reactor was operated at the ratio (Vb/VR) = 0.55, air velocity u = 0.046 m/s and t = 65 h. Thus, these values of (Vb/VR), u and t can be considered as the optimal operating parameters for a reactor when used in treatment of high-strength refinery wastewaters. In the treatment operation conducted in a reactor optimally controlled at (Vb/VR) = 0.55, u = 0.046 m/s and t = 65 h, the conversions obtained for all phenolic constituents of the wastewater were larger than 95%. The conversions of about 90% were attained for other hydrocarbons.
On functions with the Cauchy difference bounded by a functional. Part II
W odzimierz Fechner
International Journal of Mathematics and Mathematical Sciences , 2005, DOI: 10.1155/ijmms.2005.1889
Abstract: We are going to consider the functional inequality f(x
Erratum to “Pointwise Analog of the Ste?kin Approximation Theorem”
Wodzimierz ?enski
Journal of Mathematics , 2014, DOI: 10.1155/2014/978941
Abstract:
E-dictionaries and Phonolexicographic Needs of EFL Users
Wodzimierz Sobkowiak
Lexikos , 2011, DOI: 10.5788/17--515
Abstract: : The phonetic aspect of (EFL) dictionaries is among the most seriously underrated and underdeveloped in (meta)lexicography. Pertinent bibliography is scant and even the best learner dictionaries are found wanting on a number of counts. This contribution is both a summary of my thirteen-year-long research into (pedagogical) phonolexicography and a look ahead. The current state-of-the-art in phonolexicography is presented with particular attention paid to how the leading pedagogical EFL e-dictionaries relate to the actual and potential phonolexicographic needs of their users, both students and teachers.The main themes are: (a) the specificity of phonolexicographic needs of (Polish) EFL users, (b) phonetic representation, both graphic and acoustic, in dictionaries and its problems, (c) pho-netic access, i.e. querying the contents of the dictionary via the phonetic code, (d) didactic aspects of phonolexicographic information, i.e. its use in teaching and learning (EFL) pronunciation. Keywords: E-DICTIONARIES, EFL, ENGLISH, PHONOLEXICOGRAPHY, PHONETIC ACCESS, PRONUNCIATION IN DICTIONARIES Opsomming: E-woordeboeke en fonoleksikografiese behoeftes van EVT-gebruikers. Die fonetiese aspek van (EVT-)woordeboeke is van die ernstigste onderskatte en onderontwikkelde in die (meta)leksikografie. Tersaaklike bibliografiese besonderhede is skaars en selfs die beste aanleerderswoordeboeke blyk gebrekkig in 'n aantal opsigte te wees. Hierdie bydrae is sowel 'n opsomming van my dertien-jaar-lange navorsing oor (opvoedkundige) fonoleksikogra-fie as 'n blik vorentoe. Die huidige stand van sake in fonoleksikografie word aangebied met beson-dere aandag gewy aan hoe die toonaangewende opvoedkundige EVT-e-woordeboeke verband hou met die werklike en potensi le fonoleksikografiese behoeftes van hul gebruikers, sowel leerders as onderwysers.Die hoofonderwerpe is (a) die spesifieke aard van die fonoleksikografiese behoeftes van (Poolse) EVT-gebruikers, (b) die fonetiese weergawe, sowel grafies as akoesties, in woordeboeke en die probleme daarmee, (c) die fonetiese toegang, d.w.s. die raadpleging van die inhoud van die woordeboek deur middel van die fonetiese kode, en (d) die didaktiese aspekte van die fonoleksiko-logiese inligting, d.w.s. die gebruik daarvan in die onderrig en leer van (EVT-)uitspraak. Sleutelwoorde: E-WOORDEBOEKE, ENGELS, EVT, FONOLEKSIKOGRAFIE, FONETIESE TOEGANG, UITSPRAAK IN WOORDEBOEKE
Subject: Construct or Acting Being? The Status of the Subject and the Problem of Solipsism in Wittgenstein’s Tractatus
Wodzimierz HEFLIK
Argument : Biannual Philosophical Journal , 2011,
Abstract: In his Tractatus and Notebooks 1914-1916, Wittgenstein develops some themes concerning the nature of the subject, transcendentalism, solipsism and mysticism. Though Wittgenstein rejects a naive, psychological understanding of the subject, he preserves the idea of the metaphysical subject, so-called “philosophical I”. The present investigations exhibit two ways of grasping the subject: (1) subject as a boundary (of the world); (2) subject (I) as the world. The author of the paper aims to analyze different methods of conceiving the subject, both logical and transcendental. Then he discusses the naturalistic or reductionist consequences of solipsism which were derived by Wittgenstein. Moreover, he refers to the concept of ‘subject of will’ introduced in the Tractatus. Finally, the author puts a question whether the metaphysical subject is a boundary of the world identified with the subject of will. While trying to answer this question one can point to the essential difficulties of Wittgenstein’s standpoint. These difficulties become especially evident if we examine Wittgenstein’s statements concerning mysticism. The category of subject seems to gain a new dimension when reconsidered in this context. In the conclusion, the author offers an interpretation inspired by Schopenhauer’s conception of the double aspect of the subject that is to overstep these difficulties.
Kryzys lat 2007–2009 i luka informacyjna w sektorze finansowym
Wodzimierz Siwiński
Management and Business Administration. Central Europe , 2013, DOI: 10.7206/mba.ce.2084-3356.55
Abstract: Purpose: The paper aims at identifying the major information gaps related to the financial sector that have emerged during the last years, including the explanation of the reasons and consequences of these gaps.Methodology: The analysis is conducted using the descriptive methodology based on real developments in the financial sector. This analysis identifies substantial institutional changes within the financial sector combined with the introduction of new financial instruments that significantly increased information gaps related to financial developments.Findings: We found that one of the main reasons for the breakdown in the financial liquidity market was the sudden buildup of a systemic risk caused, among other things, by substantial information gaps and limitations in the transparency of financial markets. The low transparency of the financial markets has been caused by institutional changes and new financial instruments introduced within the financial sector. They were introduced by the financial institutions themselves to facilitate very risky financial activities that were very profitable for them in the short term, but – as it occurred – very disruptive for the whole financial system and the whole economy in the longer term.Research limitations: The analysis is limited only to the consideration of the causes and consequences of statistical gaps substantially reducing the transparency of the financial sector. A more comprehensive project should also explore and provide an appropriate proposal for remedy data and – even more important – a proposal to set up a macroprudential policy framework.Originality: The original contribution of the paper is the link between specific institutional changes within the financial sector as well as new financial instruments and the emergence of particular information gaps.
Developmental tendencies in container ships reloading technology
Wodzimierz ROSOCHACKI
Transport Problems : an International Scientific Journal , 2010,
Abstract: The analysis of developmental tendencies in reloading technology for container ships is presented in the paper. Innovative methods are described for typical solutions. The paper indicates factors which can have significant influence on forming modern systems of loading and unloading containers on vessels.
Peculiar nephrite from the East Saian Mts (Siberia)
Wodzimierz ?apot
Mineralogia Polonica , 2004,
Abstract: During field investigations, a rare variety of nephrite was found in one of the nephriticbodies of the ultrabasite Ospino-Kitoj massif (the East Saian). The nephrite is homogeneous, lacking of anyspot-like structure typical of nephrite, and shows very good, although dim, grey-greenish translucency.Subtle internal features of the nephrite were observed under the microscope. Its structure is similar to textileweave made of two perpendicular sets of threads, arranged lengthwise (warp) and crosswise (weft). Thecompactly set and plastically deformed, micrometer-sized tremolite threads form the thicker warp thread(0.02–0.03 mm), while the thinner weft thread is composed of thickly placed, usually singular tremolitethreads. Comparing these features with the features of nephrites from the world’s deposits it is seen that thedifferences between them essentially consists in the internal structure. Peculiarity of nephrite from the EastSaian Mts lies in its structural, textural and mineral homogeneity, a rare trait of nephrite. It is worthmentioning that such a structure is not characteristic of the tremolite asbestos, which is also present as veinsin that deposit.
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