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Regional distribution of cerebral blood flow was assessed in a group of 13 normal social drinkers under baseline conditions and after acute alcohol intoxication. Blood flow measurements were done using 15O-labeled water and positron emission tomography (PET). Each subject underwent two control sessions under baseline conditions and two sessions after(More)
Occurrence of cerebrovascular accidents has been associated with cocaine abuse. We investigated the relative distribution of cerebral blood flow (CBF) in groups of chronic cocaine users, and of normal controls. Relative CBF was measured using positron emission tomography and 15 oxygen-labelled water. The cocaine users showed areas of deranged CBF as(More)
Measurement of oxygen-15- (15O) water uptake with positron emission tomography (PET) is a sensitive technique to monitor regional brain activation secondary to stimulation paradigms. In order to investigate data acquisition times that show maximal changes in regional activation and to assess the optimal time for stimulus presentation, we investigated 10(More)
Additional evidence for the rare kaon decay K+-->pi+nu(nu) has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, 211<P<229 MeV/c, bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to(More)
Transverse single-spin asymmetries to probe the transverse-spin structure of the proton have been measured for neutral pions and nonidentified charged hadrons from polarized proton-proton collisions at midrapidity and square root(s) = 200 GeV. The data cover a transverse momentum (pT) range 1.0-5.0 GeV/c for neutral pions and 0.5-5.0 GeV/c for charged(More)
Transverse momentum spectra of neutral pions in the range 1<p(T)<10 GeV/c have been measured at midrapidity by the PHENIX experiment at BNL RHIC in Au+Au collisions at sqrt[s(NN)]=200 GeV. The pi(0) multiplicity in central reactions is significantly below the yields measured at the same sqrt[s(NN)] in peripheral Au+Au and p+p reactions scaled by the number(More)
The Lagrangian theory of structure formation in cos-mological fluids, restricted to the matter model " dust " , provides successful models of large–scale structure in the Universe in the laminar regime, i.e., where the fluid flow is single–streamed and " dust " –shells are smooth. Beyond the epoch of shell–crossing a qualitatively different behavior is(More)
Experiment E949 at Brookhaven National Laboratory studied the rare decay K ‡ ! ‡ and other processes with an exposure of 1:77 10 12 K ‡ 's. The data were analyzed using a blind analysis technique yielding one candidate event with an estimated background of 0:30 0:03 events. Combining this result with the observation of two candidate events by the(More)
Brookhaven National Laboratory (BNL) Experiment 787's second generation Unix-based data aquisition system is comprised of several independent programs, each of which controls a speciic aspect of the experiment. These programs include packages for reading events from the hardware systems, analyzing and reducing the data, distributing the results to various(More)