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1

An application of a dynamic thermography for studying a relation between thermal and mechanical activities of a skeletal muscle during a static load

Radomski D., Kruszewski K.

Measurement Automation Monitoring

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2017

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Vol. 63, No. 4

139--142

EN

A thermal distribution provides useful information of physiological and pathological processes. However, only a static thermography was applied in the most of medical studies. This paper shows an example of application of a dynamic thermography to study a physiological activity of a skeletal muscle. The goal of the presented work was to study a putative relationship between mechanical and thermal activity of the quadriceps during a static submaximal load. During a strain a dynamic temperature distribution on a thigh surface and a force moment of a knee erector were registered. The performed analysis used a time-dependent mean temperature, a time-dependent standard deviation and an impulse of a force moment. Moreover, we analyzed of autocorrelation functions to compare the dynamics of these parameters. Finally, we showed the nonlinear, statistically significant relationship between spatial-temporal variability of temperature and the force developing by a concentrative contracted quadriceps. A possible biological interpretation of the identified relation is also proposed taking the described mathematical model of muscle heat transfer into account.

2

Termowizja a bezpieczeństwo pożarowe

Kruszewski K.

Elektro Info

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2012

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nr 10

30--34

PL

Badania termowizyjne można wykorzystywać nie tylko w budownictwie w celu usta lenia strat ciepła. Można z nich także korzystać w elektroenergetyce. Ten rodzaj badania umożliwia ocenę stanu instalacji i urządzeń elektrycznych. Technologia termowizyjna daje szansę zdiagnozowania zagrożeń powstających w instalacji i urządzeniach elektrycznych. Można ją uznać za swojego rodzaju system wczesnego ostrzegania stanowiący ochronę przed stratami spowodowanymi pożarem, którego przyczyną były wady instalacji lub urządzeń elektrycznych. Wykonując zdjęcia termowizyjne instalacji lub urządzenia elektrycznego i analizując rozkład temperatur ujawniony na tych zdjęciach można ustalić miejsce potencjalnej awarii i zarzewia pożaru, co pozwala na podjęcie właściwych działań zapobiegających katastrofie. Należy pamiętać, iż 80% z ogólnej liczby pożarów wynikających z używania energii elektrycznej są to pożary spowodowane wadliwą instalacją lub urządzeniami elektrycznymi.

EN

Thermovision inspection can be used not only in construction in order to estimate heat losses. It can be also used in electrical power engineering. This kind of inspection enables an estimation of condition of power system or electrical equipment. Therrmovision technology gives an opportunity to diagnose dangers arising in power system or electrical equipment. It can be recognized as sort of early warning system created protection against losses caused by fire caused by defects of power system or electrical equipment. To make thermovision photos of power system or electrical equipment and to analyse distribution of temperature presented on these photos it is possible to find potential failures which can be mainspring of blaze. This gives a chance of taking preparations to prevent disaster. One should remember, that 80% of general number of fires as a result of using electric energy there are fires caused by defected power system or electrical equipment.

3

Głębokie zimowe inwersje temperatury na nadmorskiej terasie okolic Stacji im. H. Arctowskiego (wyspa Króla Jerzego, Szetlandy Pd., Antarktyka Zach.)

Kruszewski K.

Problemy Klimatologii Polarnej

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1998

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nr 8

47--62

EN

Paper presents results of investigations on temperature inversions, carried out during XIX Antarctic Expedition PAS in 1995, Temperature values taken from thermograph readings at Arctowski Station (3 m asl) and Point Thomas (173 m asl, situated 850 m, WNW from Station) were used to find periods of time with temperature inversions, Seven cases, analysed in this paper. Were selected as deep inversions (mean temperature gradient counted from hourly values was higher than 1°C/100 m), All presented inversions were radiation type, accompanied by calms and relatively small total nebulosity, except three cases, when nebulosity was the effect of inversion Influence of local orographic conditions on deepening temperature inversions is strong, but the main factor for it's forming is anticyclonic situation in the region of South Shetland Islands (accompanied by calms) and sea ice conditions. All analysed inversions were fonned during months with fast ice cover existence in Admiralty Bay and very close ar close ice fields on Bransfield Strait. In other ice conditions deep temperature inversions were not recorded, Minimum air temperatures at Arctowski Station recorded in July, August and September 1995 were measured during inversions. Maximum difference in air temperature between Point Thomas and Arctowski Station was recorded on July 22 (l4°C), These cases let to make conclusion, that probably all extremely low temperatures recorded during severe winters at Arctowski Station were measured in inversion conditions.