Attenuation of Infrared Radiation When Passing Through a Water Curtain

This article focuses on the interaction of infrared (IR) radiation with water droplets. The main objective of the article is the production of water mist in order of evaluation the reduction in intensity of IR radiation. In the experiments described in this paper, a set of five different nozzles was used with various spray characteristics. The respective nozzles were gradually located between the IR radiation source and a detector and the attenuation of IR radiation was assessed. The reduction in IR radiation intensity was determined and IR radiation transmittance was calculated for the respective tested nozzles

Measurement of pressure drop at pressure 4000 bar

32 s., 13 s. příl. :obr., tab., grafy +CD ROMTato bakalářská práce se zabývá stanovením tlakové ztráty v jednotlivých součástech vysokotlakého rozvodu používaného při řezání vodním paprskem. V úvodu práce autor popisuje konstrukci vysokotlakých čerpadel. Dále autor popisuje teoretický model tlakových ztrát, následovaný experimentálním měřením. V závěru se autor věnuje praktickému výpočtu modelu ztrát z naměřené drsnosti vnitřního průměru vybraných součástí

Measurement of Surface Temperature in Case of Waste Metal Container Fire

Článek se věnuje měření povrchových teplot zapáleného plechového kontejneru pomocí kontaktních a bezkontaktních metod. Dále byla měřena hustota tepelného toku pomocí radiometrů SBG01 umístěných 15 cm od pláště kontejneru. Naměřené hodnoty hustoty tepelného toku a povrchových teplot byly posuzovány s ohledem na bezpečnost osob vyskytujících se v bezprostředním okolí kontejneru, pomocí srovnání s hodnotami kritickými, definovanými v odborné literatuře. Pro měření povrchových teplot pomocí kontaktní metody byly využity plášťové termočlánky typu K, pro bezkontaktní měření se používala termokamera FLIR T640.The article deals with the measurement of surface temperatures of an ignited sheet metal container using contact and contact-less methods. Furthermore, the heat flux was measured using SBG01 radiometers located 15 cm from the container shell. The measured values of heat flux and surface temperatures were assessed with regard to the safety of persons occurring in the immediate vicinity of the container, by comparison with critical values defined in the literature. Sheathed K-type thermocouples were used to measure surface temperatures using the contact method, and a FLIR T640 thermal camera was used for contact-less measurement

Imaging evaluation of the liver using multi-detector row computed tomography in micropigs as potential living liver donors

The shortage of organ donors has stimulated interest in the possibility of using animal organs for transplantation into humans. In addition, pigs are now considered to be the most likely source animals for human xenotransplantation because of their advantages over non-human primates. However, the appropriate standard values for estimations of the liver of micropigs have not been established. The determination of standard values for the micropig liver using multi-detector row computed tomography (MDCT) would help to select a suitable donor for an individual patient, determine the condition of the liver of the micropigs and help predict patient prognosis. Therefore, we determined the standard values for the livers of micropigs using MDCT. The liver parenchyma showed homogenous enhancement and had no space-occupying lesions. The total and right lobe volumes of the liver were 698.57 ± 47.81 ml and 420.14 ± 26.70 ml, which are 51.74% and 49.35% of the human liver volume, respectively. In micropigs, the percentage of liver volume to body weight was approximately 2.05%. The diameters of the common hepatic artery and proper hepatic artery were 6.24 ± 0.20 mm and 4.68 ± 0.13 mm, respectively. The hepatic vascular system of the micropigs was similar to that of humans, except for the variation in the length of the proper hepatic artery. In addition, the diameter of the portal vein was 11.27 ± 0.38 mm. In conclusion, imaging evaluation using the MDCT was a reliable method for liver evaluation and its vascular anatomy for xenotransplantation using micropigs