Recent trends in use of magnetic fluids

390-395<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">Lubricating of friction pairs ip which it is difficult to obtain effective lubrication with traditional lubricants, sealing of bearings and gears, and lately the application of magnetically active liquids as carrier of medicines in modem medical technologies have been studied here. The research contains simulation in vitro experiments. The aim is to determine the influence of magnetic field on the flow of magnetically active liquid in vessels of human blood system.</span

Podstawy rysunku technicznego

Dla studentów wyższych uczelni technicznych, uczniów średnich szkół technicznych oraz inżynierów i techników.W książce przedstawiono zasady rysunku technicznego maszynowego dotyczące: • przedstawiania przedmiotów na rysunkach technicznych; • wymiarowania; • doboru właściwych dokładności wykonania wymiarów liniowych i kątowych oraz dopuszczalnych błędów kształtu i położenia; • oznaczania struktury geometrycznej powierzchni; • rysowania połączeń rozłącznych, sprężyn i kół zębatych. Dodatkowo zamieszczono wiele praktycznych informacji przydatnych w procesie konstruowania. Uwzględniono także aktualne polskie normy, zgodnie z normami ISO wymaganymi w Unii Europejskiej. Książka jest adresowana do studentów wyższych uczelni technicznych, uczniów średnich szkół technicznych oraz do inżynierów i techników

Investigation on magnetic fluids as lubricant

338-342Experimental data were obtained for the lubricated bearings of precision and fine mechanisms, operating in the conditions of boundary friction or, at best, of mixed friction. The use of magnetically active lubricant in the thrust bearing with the spinning point contact, where the spherical surface rotation in relation to the axially-symmetrical seat (spherical bowl or plane), makes the fluid film lubrication possible. It is possible because the addition of new potential field, that means magnetic field, changes the energetic state of equilibrium occurring in spinning friction of slides

The assessment of intra-abdominal pressure with the Polish prototype of intra-bladder pressure gauge -the own experience

Abstract The abdominal compartment syndrome (ACS) results from an acute increase of intra-abdominal pressure and may lead to severe organ dysfunction. The authors described their own experience of measurement of intra-abdominal pressure as a prevention of ACS with use of intrabladder pressure (IBP) gauge of own conception and construction. The IBP was measured during operations and postoperative period of 100 patients by a Polish gauge constructed in Technical University of Łódź. Since December 2000 through November 2007 we measured IBP in 100 patients (85 newborns, 15 children from 1 to 3 years old) operated on because of: gastroschisis -52, omphalocele -24, congenital diaphragmatic hernia -9, abdominal wall hernia after primarily non-surgical treatment of giant omphalocele -15. In 13 patients who underwent staged repair postoperative IBP measurement decided of timing, frequency and extent of silo reductions and timing of final abdominal closure. We did not observe symptoms of abdominal compartment syndrome in our patients, there were no deaths as a result of complications due to high intra-abdominal pressure since the introduction of IBP measurement. Conclusions: 1) We recommend measurement of IBP as an objective, non-invasive and simple method to evaluate the intra-abdominal pressure and prevention of abdominal compartment syndrome. 2) Intra and postoperative measurement of IBP helps to avoid the compartment syndrome and its dire consequences