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The influence of electromagnetic wave originating from WiFi router on water viscosity

Tatoń G., Dziob D., Mielnicka A., Lisowski B., Rok T., Świątek M., Kuterba P., Rokita E.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 12

278--280

EN

The aim of the study was to investigate if microwaves generated by a typical WiFi router influence the viscosity of water, as suggested by some authors. The idea relies on the microscopic observation of magnetic nano-beads motion with and without microwave irradiation. A static magnetic field was applied to force the nano-beds movements in the microscope field of view (FOV). The nano-beds velocities under microwave irradiation were compared to their velocities without the electromagnetic stimulation.

PL

Celem prezentowanej pracy było sprawdzenie, czy mikrofale generowane przez typowy router WiFi wpływają na lepkość wody, jak sugerują niektórzy autorzy. Pomysł bazuje na obserwacji ruchu magnetycznych nanocząstek pod mikroskopem w obecności mikrofal i bez nich. Ruch nanocząstek w polu widzenia mikroskopu był wymuszony przez zastosowanie stałego pola magnetycznego. Porównywano prędkości nanocząstek w obecności pola elektromagnetycznego i bez niego.

2

Evaluation of allergic response using dynamic thermography

Rokita E., Rok T., Tatoń G.

Opto-Electronics Review

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2015

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Vol. 23, No. 1

53-59

EN

Skin dynamic termography supplemented by a mathematical model is presented as an objective and sensitive indicator of the skin prick test result. Termographic measurements were performed simultaneously with routine skin prick tests. The IR images were acquired every 70 s up to 910 s after skin prick. In the model histamine is treated as the principal mediator of the allergic reaction. Histamine produces vasolidation and the engorged vessels are responsible for an increase in skin temperature. The model parameters were determined by fitting the analytical solutions to the spatio-temporal distributions of the differences between measured and baseline temperatures. The model reproduces experimental data very well (coefficient of determination = 0.805÷0.995). The method offers a set of parameters to describe separately skin allergic reaction and skin reactivity. The release of histamine after allergen injection is the best indicator of allergic response. The diagnostic parameter better correlates with the standard evaluation of a skin prick test (correlation coefficient = 0.98) than the result of the thermographic planimetric method based on temperature and heated area determination (0.81). The high sensitivity of the method allows for determination of the allergic response in patients with the reduced skin reactivity.

3

Analiza termogramów w obszarach uszkodzeń

Madej J., Rokita E., Rok T., Tatoń G.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Nauki Techniczne

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2007

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Z. 4

81-83

PL

W okresie eksploatacji maszyn i urządzeń dużą rolę odgrywają przeglądy techniczne, podczas których dokonuje się oceny stopnia zużycia części maszyn za pośrednictwem rozmaitych badań diagnostycznych. Wczesne wykrycie i zlokalizowanie defektów materiałowych w elementach maszyn jest bowiem zagadnieniem kluczowym dla dalszej ich eksploatacji i niejednokrotnie pozwala uniknąć poważnych awarii i katastrof. Skuteczność badań diagnostycznych rzutuje niejednokrotnie na prognozowanie okresu dalszej, bezpiecznej eksploatacji. Ma to szczególne znaczenie w przypadku tych konstrukcji inżynierskich, które z uwagi na ekstremalnie niekorzystne warunki pracy są narażone na powstanie i kumulację defektów materiałowych.

EN

Technical inspection has an essential influence on the service period of machines and appliances. The frequency and the range of inspections are established in every case upon the knowledge of service conditions and the design of a particular machine or system. Based upon this knowledge, during the inspection, the level of wear of the investigated parts is assessed by means of different diagnostic techniques. The prognosis of further safe life of the analyzed part or subsystem depends on the effectiveness of these investigations and quality of the obtained outcomes. Early detection and localization of material failures of machine parts is the key factor for their further usage, and in many case it makes it possible to avoid serious failures and catastrophes as well as probable costs and people tragedies. This paper presents a non-destructive means of detecting small scale damage of structures with variation in thermal properties of the material. The assumption is supported by numerical calculations, which are in full agreement with experimental investigations made by means of Thermovision techniques. Experiments performed and suitable numerical simulation confirms the essential connection between the state of damage and thermal transmission properties of the investigated materials.