National Repository of Grey Literature 13 records found  previous11 - 13  jump to record: Search took 0.01 seconds. 
Breeding and reintroduction of bearded volture (Gypaetus barbatus)
Rudolfová, Veronika ; Zita, Lukáš (advisor) ; Ledvinka, Zdeněk (referee)
Vultures are a group of predators (Accipitriformes) of the Hawks family. It is a very unique group, which is distinguished from others mainly by its manner of eating and appearance. Vultures do not hunt live prey, but feast on carrion. Typical sign of these great predators is a bare head and long neck. Bearded vulture is not a typical example of a vulture and speculations are held whether it should be classified in the vultures family. Although it feeds on carrions, its head is plumy and it does not stay in groups, but lives as a couple, individually or creates polyandric trios instead. Bearded vulture also lives in inaccessible terrain high in mountains, where its main component of nourishment are bones of farm and wild animals. In the past century population of Bearded vulture greatly declined mainly due to illegal poisoning, decrease of natural habitat and nourishment and due to low natality. Low natality is caused by the fact that in a congeries of two eggs, only one can survive. The other egg functions only as a substitute. If both eggs hatch, the older hatchling exhibits sings of aggression towards the younger hatchling. The parents do not seek to interfere and encourage only the older hatchling. This aggression is an objective of examination of many experts aswell as attempting to prevent it. The Programme Vulture Conservation Foundation (VCF) is an organization for vulture retrieval, which associates catteries and zoological gardens that want to participate in the spread of the Bearded vulture population. In the year 1986 this programme started to work and since then made huge steps. In Alps and Pyrenees there has been an increase in the number of individuals that give birth to young every year.
DST-XL scintillation camera and stability of its visual field uniformity
RUDOLFOVÁ, Veronika
Visual field uniformity of DST-XL scintillation camera is assessed on daily basis during quality controls of instrumentation at the Department of Nuclear Medicine at Hospital in České Budějovice. Uniformity is a critical quality parameter in scintigraphic imaging. It indicates whether all points in visual field are displayed with equal efficiency (sensitivity). Also, it allows specialists to obtain quality images of how radiopharmaceuticals are distributed in a patient?s body. The objective of my bachelor?s thesis is to verify whether the measured values fall within the range set by the manufacturer. Assessments were carried out on a bi-weekly basis for the duration of six months between start of October 2010 and end of March 2011. The measurement method used at the Department of Nuclear Medicine at Hospital in České Budějovice employs homogeneous irradiation of the detector without collimator produced by a point source which allows assessment of intrinsic uniformity of the detector. Also, there is another method that determines total (extrinsic) uniformity of the camera. This method utilizes an area source to produce homogeneous irradiation of the detector. The important difference between the two methods is that the latter uses collimator, unlike the method used for the purposes of this thesis. Yet, both methods produce roughly the same outcomes. The results obtained from the tests of stability of DST-XL scintillation camera?s visual field uniformity fall within the range of values permitted by the manufacturer and confirm my hypothesis.

National Repository of Grey Literature : 13 records found   previous11 - 13  jump to record:
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10 RUDOLFOVÁ, Veronika
2 RUDOLFOVÁ, Vladimíra
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