The measurement and the control of thermal comfort parameters require appropriate technical means. These are devices specified for the acquisition of physical parameters of an environment; evaluating data and controlling according thermal comfort indexes. Research and development in measurement of mean readiant temperature has been done, because this parameter is the specific one. Further a unit - an embedded system proposed for the evaluation of the thermal comfort indexes and for the optimal control of thermal comfort is being developed.
This paper is an extension of the work Optical System of Boroscope I [1]. It describes the scheme of a mechanical tube construction, the boroscope head with an iris diaphragm and the end imaging optical member. A colour CCD camera connected with the boroscope head using a bellows transfer electronic signals of the compound flame image to the PC monitor. The monitored three coloured (red, green, blue) images and their intensities give more information about the flame quality, so that it is possible to achieve more efficient and eco-friendly combustion processes. and Předložený článek navazuje na práci [1] Optická soustava boroskopu I, přičemž uvádí schéma mechanické stavby tubusu, hlavy boroskopu s clonou a posledního zobrazovacího členu. S hlavou boroskopu je měchem spojena barevná CCD kamera, která přenáší barevné signály a složený bílý signál na obrazovku počítače, resp. jeho barevné složky (červenou, zelenou a modrou) a jejich intenzity. Monitorovaný obraz pak dává dokonalejší informace o kvalitě plamene a pomocí nich umožňuje efektivnější ovlivňování účinnosti a ekologie spalovacího procesu.
Within the zoological disciplines the study of mammalian hair has mostly been limited to crossspecies comparisons, but there is also considerable intraspecifi c variation in hair characteristics that may be biologically meaningful and deserving of study, though it can be tedious to manually measure hundreds of hairs under a microscope. Here a method is presented for assessing a variety of morphological characteristics of mammalian hairs that is fast, nearly fully-automated, does not require a microscope, and that could easily be used by wildlife biologists or researchers studying museum skins. Using hair samples from 6 captive white-tailed deer (Odocoileus virginianus) hairs were placed in groups of ten on white 3 x 5 inch index cards and covered with clear packing tape. Cards were scanned with a standard fl atbed scanner at high resolution (1200dpi) and the images imported into a computer image analysis program. The program automatically selected and measured each hair, relayed the data to a text fi le, and cycled through all images so that the 120 deer hairs examined (20 per animal) were all measured within 5 minutes. The data returned included the length of each hair (even if it was curly), the width (the average width of the entire shaft), the 2-dimensional surface area, as well as the colour of the hair, measured with hue and brightness scores averaged over the entire shaft. These data are well-suited for examining questions regarding factors infl uencing the morphology or colour of mammalian pelage, or for using hair morphology to assess the nutritional status of individuals, as is done with humans. When measurements are completed, cards can be conveniently stored, either in an index card box or ringed binder, and they can even be re-scanned (at higher resolutions, for example) if needed. Alternatively, the index card step could be skipped and hairs could be scanned loosely in batches. Either way, this method should allow zoological researchers to pursue a wide variety of questions relating to mammalian hair morphology.
The review summarizes basic information about slow and fast chlorophyll (Chl) a fluorescence induction kinetics (FIK) recorded using fluorimeters working on a principle of the pulse amplitude modulation (PAM) of a Chl fluorescence signal. It explains fundamental principles of the measuring technique, evaluates the terminology, symbols, and parameters used. Analysis of Chl FIK resulting in a set of Chl fluorescence parameters (FPs) provides qualitative and quantitative information about photosynthetic processes in chloroplasts. Using FPs, one can describe the functioning of the photosynthetic apparatus under different internal and external conditions. Brief comments on proper application of the fluorimetric method in photosynthesis research and some actual examples are also given. and K, Roháček, M. Barták.
Several conditions of isolation were evaluated to determine which yielded the greatest number of thermotolerant and pathogenic freeliving amebae. Swab samples, easier to obtain and process, produced more pathogenic amebae than water samples. If water samples are required, 50-ml volumes gave the greatest percentage of pathogenic isolates. An incubating temperature of 42"C yielded the most thermotolerant amebae. A total of 11 pathogenic isolates were obtained from 762 environmental samples and were Acanthamoeba (55 %), Naegleria fowleri Carter, 1970 (27 %), and N. australiensis De Jonckheere, 1981(18%).