International cooperation of polish researchers with partners from abroad: A scientometric study

Publications resulting from international cooperation and included in seven SCI annual files 1987–1989 and 1992–1995 were analyzed. It was observed that after the political changes of the turn of 1980s considerable increase in the number of publications was accompanied by the geographic development of co-authorship. Information coming from SCI 1992–1995, elaborated, completed and encoded were entered into an own database designed for analytical purposes. During these four years above 9600 papers were published in over 1600 prestige journals, of which almost 2200 publications resulted from multilateral cooperation. Altogether the foreign coauthors came from 102 countries, but over 80% of international papers were published in cooperation with the partners from 11 countries. The domestic participants came from over 200 research and educational organizations. It was found that the biggest share of papers within this multidisciplinary file represented physics (≈40%), chemistry (≈21%), and biomedical research (≈11%).     

A semi-analytical simulation strategy and its application to warpage of autoclave-processed CFRP parts

The manufacturing of composite structures is accompanied by fabrication induced deformations. Those deformations are undesirable and lead to transgression of geometric tolerances in the finished parts. In order to get the part within aspired dimensional tolerances, geometrical compensation of the tool is necessary. This often iterative conducted tooling-rework is commonly time consuming and costly. This paper presents an shell element based. semi-analytical simulation approach focusing on warpage deformations due to tool part interaction, in order to account for manufacturing induced deformations within the tool design process. Deviation measurements on test specimen level serve as inputs for the calculation of equivalent coefficients of thermal expansion according to the proposed analytical model. Thus, ‘warpage properties’ of different prepreg – tool–material combinations are determined. The use and the practicability of the developed approach is demonstrated by means of the calculation of a warpage compensated tool surface.     

Periodical literature of information science as reflected in Referativnyj Zhurnal,section 59, informatika

The paper presents results of a study of information science periodical literature included intoRZh-Informatika in the period 1977–1983. The distribution of papers among periodicals and their language pattern are shown. The list of 95 periodicals that rendered at least 12 papers per year is also presented. The results are compared with some data taken from theSSCI-JCR database. Connections between information science and scientometrics are investigated by the overlap of periodical literature in both fields.     

Use of bibliographic data bases for scientometric studies

The paper is a review of different applications of various bibliographic data bases to bibliometric and scientometric research such as identifying the leading journals in certain fields, investigating the structure and development of particular fields including trend analysis and forecasting, as well as the study of the contribution of various countries to world science as reflected in scientific literature presented in information files. The paper also covers the results of investigation of Polish scientific literature, as presented in the foreign data bases, in the fields of information science (LISA, ISA, INSPEC, 1977–1983), chemistry (CASearch, 1978–1985), physics (INSPEC, 1979–1985), science-various disciplines (SCISEARCH, 1980–1984). Along with many advantages of using bibliographic data bases for scientometric research some limitations are also described which may originate in data bases content, and have to be taken into account while designing such a type of investigation.     

Soil Material Porosity Characterization by Thermal Desorption of Liquids

Thermal desorption of acetone and benzene from soil materials was investigated by using quasi-isothermal thermogravimetric technique.Experimentally obtained curves representing mass loss of adsorbate against temperature were converted into plots of adsorbent pore volume versus plate separation. The transformation was performed by applying the Kelvin equation. Calculated distributions and total pore volumes were consistent with the results obtained from nitrogen sorption and mercury intrusion measurements.     

Study of the effects of thermotherapy in benign prostatic hypertrophy

The role(s) of protein kinases in the regulation of G protein-dependent activation of phosphatidylinositol-specific phospholipase C by tumor necrosis factor-alpha was investigated in the osteoblast cell line MC3T3-E1. We have previously reported the stimulatory effects of tumor necrosis factor-alpha and A1F4-, an activator of G proteins, on this phospholipase pathway documented by a decrease in mass of PI and release of diacylglycerol. In this study, we further explored the mechanism(s) by which the tumor necrosis factor or A1F4(-)-promoted breakdown of phosphatidylinositol and the polyphosphoinositides by phospholipase C is regulated. Tumor necrosis factor-alpha was found to elicit a 4-5-fold increase in the formation of [3H]inositol-1,4-phosphate and [3H]inositol-1,4,5-phosphate; and a 36% increase in [3H]inositol-1-phosphate within 5 min in prelabeled cells. [3H]inositol-4-phosphate, a metabolite of [3H]inositol-1,4-phosphate and [3H]inositol-1,4,5-phosphate, was found to be the predominant phosphoinositol product of tumor necrosis factor-alpha and A1F4(-)-activated phospholipase C hydrolysis after 30 min. In addition, the preincubation of cells with pertussis toxin decreased the tumor necrosis factor-induced release of inositol phosphates by 53%. Inhibitors of protein kinase C, including Et-18-OMe and H-7, dramatically decreased the formation of [3H]inositol phosphates stimulated by either tumor necrosis factor-alpha or A1F4- by 90-100% but did not affect basal formation. The activation of cAMP-dependent protein kinase, or protein kinase A, by the treatment of cells with forskolin or 8-BrcAMP augmented basal, tumor necrosis factor-alpha and A1F4(-)-induced [3H]inositol phosphate formation. Therefore, we report that protein kinases can regulate tumor necrosis factor-alpha-initiated signalling at the cell surface in osteoblasts through effects on the coupling between receptor, G-protein and phosphatidylinositol-specific phospholipase C.     

THE METHOD OF CONCENTRATED SOURCES IN HEAT CONDUCTION

In this article a method of an approximate solution of a parabolic initial boundary value problem is presented. As an example the heat conduction equation is considered. This method consists of introducing some fictitious heat sources outside the region under consideration and choosing some points at the boundary of the region where the boundary conditions are strictly satisfied. The intensities of the sources are assumed to vary stepwise in time. The method may also be applied to the solution of inverse problems of heat conduction. Numerical results are given for some illustrative problems.