An overview of palatalization-i

Jerzy Rubach 한국음운론학회 2002 음성·음운·형태론 연구 Vol.8 No.2

Rubach, Jerzy. 2002. An overview of palatalization-i. Studies in Phonetics, Phonology and Morphology. 8.2. 169-186. This article looks at the problem of palatalization before i from various perspectives: SPE, Lexical Phonology, Feature Geometry, and Optimality Theory. It shows how each of these theories arrives at an analysis of the data from Russian. These analyses are different in terms of how they capture phonological generalizations because the fundamental assumptions of each framework are different. It is concluded that the tenets of lexical versus postlexical derivations and feature geometry, on the one hand, and the tenet of universalism, on the other hand, are fundamental to an insightful analysis of the palatalization before i required by the grammar of Russian. (University of Iowa/University of Warsaw)

Posterior stridents in Korean and Russian

Jerzy Rubach 한국음운론학회 2004 음성·음운·형태론 연구 Vol.10 No.1

Rubach, Jerzy. 2004. Posterior stridents in Korean and Russian. Studies in Phonetics, Phonology and Morphology. 10.1. 145.167. Derived posterior stridents are similar, though not identical, in Korean and Russian but they have different sources in the underlying representation. They come from dentals in Korean and from velars in Russian. Posterior stridents are a combined effect of Palatalization and segment inventory constraints. The latter are responsible for the fact that posterior stridents differ from their source segments in place and, in the case of stops, manner of articulation. Inventory constraints determine the type of admissible palatalized segments. The Korean system of derived posterior stridents is simpler than the Russian system and, counter to G.-R. Kim (2002), does not provide an argument for level distinctions in Optimality Theory. Such argument exists in Russian because posterior fricatives act in an ambiguous way: they behave as palatalized segments with vis-a-vis some processes and as velarized segments vis-a-vis some other processes. This contradiction is solved by postulating a distinction between the word level and the phrase level. Crucially, segment inventory constraints are ranked differently at each level. (University of Iowa/University of Warsaw)

Conceptual and detailed design knowledge management in customized production – Industrial perspective

Jerzy Pokojski,Konrad Oleksin´ ski,Jarosław Pruszyn´ ski 한국CDE학회 2019 Journal of computational design and engineering Vol.6 No.4

The current market situation forces companies that deal with small scale, dedicated production to meet the needs and demands of their customers quickly. Usually, the products must be designed to fulfil a cer-tain set of requirements. Additional conditions necessary to meet are also the limitations resulting from law regulations related to environmental, safety, maintenance and recycling matters. The imposed requirements are very often contradictory. In such cases the design process is an attempt to find a rational compromise. Fulfilling all the above-mentioned conditions is very difficult, especially for small companies. As the result, engineers have to take into consideration a much wider scope of tasks and responsibilities which are related to different areas of knowledge. Knowledge of a particular area is not always mastered to the extent that allows them to move freely within it. In such situations engineers are willing to use personal knowledge and experiments as the basic sources of design information. The exchange of opinions, joint evaluation of concepts and detailed solutions, as well as long-term and short-term close teamwork are also often observed. Public tools to support the indicated processes did not fully meet the team’s requirements. The authors introduce a proposal for an application that supports the solving of this class problem based on modelled, acquired and stored knowledge. The work presents the characteristics and range of supported engineering processes. Next, the concept and the construction of the software, as well as its functioning using real examples, which derive from industrial practice, are presented.

On the non-linearities of ship’s restoring and the Froude-Krylov wave load part

Jerzy Edward Matusiak 대한조선학회 2011 International Journal of Naval Architecture and Oc Vol.3 No.1

When formulating a general, non-linear mathematical model of ship dynamics in waves the hydrostatic forces and moments along with the Froude-Krylov part of wave load are usually concerned. Normally radiation and the diffraction forces are regarded as linear ones. The paper discusses briefly few approaches, which can be used in this respect. The concerned models attempt to model the non-linearities of the surface waves; both regular and the irregular ones, and the nonlinearities of the restoring forces and moments. The approach selected in the Laidyn method, which is meant for the evaluation of large amplitude motions in the 6 degrees-of-freedom, is presented in a bigger detail. The workability of the method is illustrated with the simulation of ship motions in irregular stern quartering waves.

특강 11

( Jerzy A . Szpunar ) 대한금속재료학회 ( 구 대한금속학회 ) 1999 대한금속학회 추계학술대회 개요집 Vol.1999 No.-

INFLUENCE OF TEMPERATURE ON THE TYRE ROLLING RESISTANCE

Jerzy Ejsmont,Stanislaw Taryma,Grzegorz Ronowski,Beata Swieczko-Zurek 한국자동차공학회 2018 International journal of automotive technology Vol.19 No.1

Temperature is a very important factor controlling rolling resistance of road vehicle tyres. There are at least three different temperatures that may be considered as important factors controlling thermal conditions of the rolling tyre. The most common measure of the thermal conditions during tyre rolling is ambient air temperature. The other two are: pavement temperature and “tyre” temperature. Tyre temperature is the most difficult to establish, as temperatures of different parts of rolling tyres differ considerably, thus there is a problem to obtain representative values. In the authors’ opinion, air temperature is the most universal and reliable parameter to measure. The article presents results obtained in the Technical University of Gdańsk during laboratory and road measurements of different car tyres rolling on different pavements. The knowledge of rolling resistance characteristics is important for modelling car dynamics as well as fuel consumption. It is also necessary to establish proper test conditions in the future standardized on-road method of measuring rolling resistance. The results indicate that generally each tyre and pavement combination is influenced by the air temperature in a unique way, but at the same it is possible to propose some general influence factors that may be used to normalize measurements to the standard temperature of 25 °C.

Freiheit , Recht und Demokratie - Die Postkommunistische Gesellschaft zwischen Ausbruch und Nostalgie

Jerzy Holzer 한독사회과학회 1995 한독사회과학논총 Vol.5 No.-

TEMPERATURE INFLUENCE ON TIRE ROLLING RESISTANCE MEASUREMENTS QUALITY

Jerzy Ejsmont,Grzegorz Ronowski,Wojciech Owczarzak,Slawomir Sommer 한국자동차공학회 2022 International journal of automotive technology Vol.23 No.1

Global warming makes it necessary to reduce energy consumption, which in the case of motor vehicles, is connected, among other things, with reduction of resistive forces acting on a vehicle during its motion. One of the most important components of those forces is rolling resistance, which is very difficult to measure, especially in road conditions. The article deals with issues related to the influence of the thermal state of the tire on the accuracy of the results of rolling resistance measurements, especially for “on the road” tests. This is an important issue because currently road measurements of rolling resistance, unlike laboratory tests, are not covered by any standard indicating the correct measuring procedures and data analysis. The influence of temperature on the tire rolling resistance for passenger car and truck tires is presented, and it is determined what conditions must be met for the thermal state of the tire to ascertain a reliable measurement of the rolling resistance.

A rheological model to predict viscosity of dispersions as a function of the modified Peclet number

Jerzy P. Sęk,Mariola M. Błaszczyk,Lukasz Przybysz 한국유변학회 2019 Korea-Australia rheology journal Vol.31 No.2

The suspensions and emulsions are important products and raw materials for various industrial production and processing branches. The knowledge concerning the rheological properties of such substances is of key importance for many manufacturing processes. Many dependences can be found within the literature but there is lack of model that takes into account the influence of inner phase concentration, share rate, and diameters of the dispersed phase particles on a viscosity of these systems. The presented work goal was to obtain a rheological equation containing the modified form of Peclet number, which would provide the relation between the viscosity, the volume fraction, and the shear rate. The theory of Kozeny-Carman, which transforms the granular structure into a bunch of the torturous capillary tubes, was the base of this model. The proposed model has been verified for data available in the literature and for the data obtained in authors own experiments.

Buckling and stability of elastic-plastic sandwich conical shells

Jerzy Zielnica 국제구조공학회 2012 Steel and Composite Structures, An International J Vol.13 No.2

Shell structures are very interesting from the design point of view and these are well recognized in the scientific literature. In this paper the analysis of the buckling loads and stability paths of a sandwich conical shell with unsymmetrical faces under combined load based on the assumptions of moderately large deflections (geometrically nonlinear theory) is considered and elastic-plastic properties of the material of the faces are taken into considerations. External load is assumed to be two-parametrical one and it is assumed that the shell deforms into the plastic range before buckling. Constitutive relations in the analysis are those of the Nadai-Hencky deformation theory of plasticity and Prandtl-Reuss plastic flow theory with the H-M-H (Huber-Mises-Hencky) yield condition. The governing stability equations are obtained by strain energy approach and Ritz method is used to solve the equations with the help of analytical-numerical methods using computer.