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Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at sqrt[sNN] = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at sqrt(s_NN)=130 GeV using the STAR TPC at RHIC. The elliptic flow signal, v_2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.
Only a few Methyl-[11C]-l-methionine (MET) positron emission tomography (PET) studies have focused on children and young adults with brain neoplasm. Due to radiation exposure, long scan acquisition time, and the need for sedation in young children MET-PET studies should be restricted to this group of patients when a decision for further therapy is not possible from routine diagnostic procedures alone, e.g., structural imaging. We investigated the diagnostic accuracy of MET-PET for the differentiation between tumorous and non-tumorous lesions in this group of patients. Forty eight MET-PET scans from 39 patients aged from 2 to 21 years (mean 15 ± 5.0 years) were analyzed. The MET tumor-uptake relative to a corresponding control region was calculated. A receiver operating characteristic (ROC) was performed to determine the MET-uptake value that best distinguishes tumorous from non-tumorous brain lesions. A differentiation between tumorous (n = 39) and non-tumorous brain lesions (n = 9) was possible at a threshold of 1.48 of relative MET-uptake with a sensitivity of 83% and a specificity of 92%, respectively. A differentiation between high grade malignant lesions (mean MET-uptake = 2.00 ± 0.46) and low grade tumors (mean MET-uptake = 1.84 ± 0.31) was not possible. There was a significant difference in MET-uptake between the histologically homogeneous subgroups of astrocytoma WHO grade II and anaplastic astrocytoma WHO grade III (P = 0.02). MET-PET might be a useful tool to differentiate tumorous from non-tumorous lesions in children and young adults when a decision for further therapy is difficult or impossible from routine structural imaging procedures alone. Keywords Brain tumor - Children - PET - Methionine - Molecular imaging
Emoce jsou verbalizované city. Předtím, neţ jsou vyjádřeny, hodnotí mluvĉí urĉitou skuteĉnost, příp. objekt. Evaluace v něm mŧţe vzbudit rŧzné emoce. Emoce a hodnocení je tedy třeba od sebe přísně oddělit. K hodnocení slouţí v němĉině především modální slova, která mohou vyjádřit epistemický, doxický, distancující se nebo hodnotící postoj mluvĉího. Jazyk disponuje rŧznými jazykovými prostředky k vyjádření emoĉních postojŧ. Z komunikaĉních forem výpovědi je třeba jmenovat nejprve expresivní (výrazové) věty, přiĉemţ exprese/výraz představuje funkci jazykového znaku ve smyslu Bühlerova organon-modelu přirozeného jazyka. Dále sem patří příznakové formy vět jako osamostatněné vedlejší věty a neslovesné vazby.
The article describes the role of German as a working language and official language of the European Union. It also focuses on issues associated with the notion of an 'overarching' language of general use: especially in the field of law, each language reflects the specific legal and administrative traditions of the society in which it developed, meaning that different languages frequently lack precise one-to-one equivalents for particular legal concepts. Finally, the author assesses the 'economic value' of several European languages as proposed by Ulrich Ammons, demonstrating that German plays a leading role in this regard.
Přìběh o svatoduńnìm zázraku ve Skutcìch apońtolů je východiskem pro pozorovánì a reflexi vztahu mezi vìnem a jazykem: veřìcì Ņidé podezřìvajì apońtoly mluvìcì v jazycìch (glosolálie), ņe vypili přìliń mnoho vìna. To dalo vzniknout různým frazeologismům. Kromě toho ukazujì různé překlady bible různorodost výrazů pro vìno v němčině. V německém jazyce představuje vìno v kognitivnìm pojetì blahobyt, úspěch a pohostinnost.