1,253 research outputs found
Intensity-Duration-Frequency Relationship of Point Precipitation at Uccle.Reference period 1934-1983
No full textThe intensity-duration-frequency relationship of the point precipitation at the station of Uccle/Ukkel is studied, using the charts of the Hellmann-Fuess recording precipitation gauge for the 50 years reference period 1934-1983. For the frequency analysis the annual maximum series approach was used in conjunction with the Gumbel distribution function. Intensity-duration (containing the return period T implicitly intensity-duration-frequency (containing T explicitly) curves based on the observed values are proposed; the results are presented under several aspects.Sur base des données tirées des enregistrements obtenus au pluviographe Hellmann-Fuess au cours de la période de 50 années allant de 1934 à 1983, on étudie la relation intensité-durée-fréquence des précipitations à la station d’Uccle. L’analyse des fréquences a été réalisée par application de la fonction de distribution de Gumbel à la série des valeurs maximale annuelles. Des courbes intensité-durée (contenant T explicitement), basées sur les données d’observations, sont proposées ; les résultats sont présentées sousdivers aspects.De intensiteit-duur-frequentie relatie voor de puntneerslag van het station te Ukkel wordt bestudeerd aan de hand van de pluviogrammen van de Hellmann-Fuess pluviograaf voor de 50-jarige referentieperiode 1934-1983. Voor de frequentieanalyse werd gekozen voor de “extreme waarden reeks” aanpak en de bijhorende Gumbel verdelingswetten werden geschat. Regenduurlijnen afgeleid van de waarnemingen worden bepaald en de resultaten worden onder diverse vormen voorgesteld
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Inclusive J/{psi}, {psi}(2S) and b-quark production in {bar p}p collisions at {radical}s = 1.8 TeV
No full textInclusive J/{psi} and {psi}(2S) production has been studied in {bar p}p collisions at {radical}s = 1.8 TeV using the Collider Detector at Fermilab. The products of production cross section times branching fraction have been measured as functions of P{sub T} for J/{psi}({psi}(2S)) {yields} {mu}{sup +}{mu}{sup {minus}} in the kinematic range P{sub T}{sup J/{psi}({psi}(2S))} > 6 GeV/c and {vert_bar}{eta}{sup J/{psi}({psi}(2S)){vert_bar}} {le} 0.5. The products of the integrated cross section times branching fraction are calculated and used to obtain an inclusive b-quark production cross section
A fractal analysis of multiparticle production in hadron hadron collision ats**(1/2) = 16.7 GeV.
No full textSome fractal aspects of multiparticle production in hadron-hadron
interactions at sqrt{s} ~ = 16.7 GeV are investigated through an analysis of the moments
Gq^nu and Gq^h suggested by Hwa. The validity of the interpretation of the data in this
framework is investigated and discussed
Study of intermittency in h h collisions at s**(1/2) = 16.7 GeV.
No full textCharged-particle multiplicity distributions from hadron-hadron collisions at sqrt{s} =16.7 GeV are analyzed in rapidity, pseudorapidity and azimuthal angle intervals. The data—fully reconstructed events—were taken in the rapid-cycling Bubble Chamber of the International Hybrid Spectrometer Consortium exposed to a hadron beam (147 GeV/c momentum) of the Tevatron at Fermilab. The factorial moments of the multiplicity distributions increase with decreasing rapidity interval. The energy dependence of the slopes in h-h collisions is discussed. Suitable phase-space cuts show that most of the intermittency effect stems from low-transverse-momentum particles. In the two-dimensional analysis (rapidity azimuthal angle) we find a weak enhancement of the slope values, more in agreement with the observations by the NA22 experiment, rather than the observations in e+e− by the HRS collaboration
A fractal analysis of multiparticle production in hadron-hadron collisions at {Mathematical expression}=16.7 GeV
No full textSome fractal aspects of multiparticle production in hadron-hadron interactions at {Mathematical expression}=16.7 GeV. are investigated through an analysis of the moments G q v and G q h suggested by Hwa. The validity of the interpretation of the data in this framework is investigated and discussed
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WW and WZ production at the tevatron
No full textDirect limits are set on WWZ and WW{gamma} three-boson couplings in a search for WW and WZ production in p{bar p} collisions at {radical}s = 1.8 TeV using the D(0) and CDF detectors at the Fermilab Tevatron
A correlational study regarding COMPASS' ability to predict GPA at a Western Wisconsin Technical College
No full textPlan BFrom a historical perspective, college admissions testing has been utilized since the 14th century. Preparation and entrance requirements for a particular college has changed over the subsequent centuries. In the United States, college admissions began regulations in response to the growing aversion to diverse methods of college preparation. College admission boards were established and standardized testing for student academic success has been utilized at most colleges and universities since the 21st century (Promfret,1975). The Computerized-Adaptive Placement Assessment and Support System (COMPASS) is a comprehensive software and operational support package developed by the American College Testing program (ACT) to help post-secondary institutions place students into appropriate entry level courses and to diagnose specific strengths and weaknesses in potential students. Wisconsin Indianhead Technical College (WITC) is a public, post-secondary educational institution that offers associate degrees, technical diplomas, certificates and non- credit courses to residents of northwestern and eastern Minnesota. Admissions into WITC involves meeting for an interview with a counselor and examining factors such as ACT scores, previous grades, and other standardized tests such as COMPASS to assess potential students for admissions. The purpose of this correlational study is to determine if COMPASS assessment scores accurately predict first-year student success or GPA. The hypothesis in the study is: no significant relationship exists between the COMPASS scores and GPA of first-year technical college students at Wisconsin Indianhead Technical College. The subjects will consist of first-year students with full COMPASS scores (i.e. reading, writing, and math). COMPASS scores and GPA data will be analyzed using the Statistical Package of Social Sciences (SPSS) by way of linear regression. A variety of research has been conducted focusing on college admissions testing, but none of the studies looked specifically at the use of COMPASS reading, writing, and math components in the Wisconsin Technical College System. An unstructured research project reviewed archival records of students and it appeared that a lack of correlation exists between COMPASS scores and GPA, (Grade Point Average) of first-year technical college students at Wisconsin Indianhead Technical College. To determine if this assessment accurately predicts the academic success (AKA: Grade Point Average or GPA) of first-year students, this research will compare COMPASS scores of first-year students with their GPA
Limits on t quark decay into charged Higgs from a direct search at the CERN p anti-p collider
No full textA search for t-quark decay into charged Higgs, t --> H+b, with the charged Higgs decaying via the H+ --> tau+nu-tau mode, has been done in proton-antiproton collisions at square root s = 0.63 TeV with the UA1 experiment. No evidence for this decay has been observed. Mass limits at 95% and 90% CL for the t-quark and the charged Higgs are presented. The results have also been interpreted in terms of the tan beta-parameter of a two-doublet Higgs sector
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Search for W prime and Z prime at CDF
No full textWe have searched for heavy charged and neutral vector bosons via the decays W{prime} {yields} ev, W{prime} {yields} {mu}v, Z{prime} {yields} {mu}{mu} in p{bar p} collisions at {radical}s = 1.8 TeV, using data taken with the collider Detector at Fermilab. The nonobservation of these processes leads to a lower limit (95% confidence level) of 520 GeV/c{sup 2} on the mass of the W{prime} and of 412 GeV/C{sup 2} on the mass of the Z{prime}, assuming standard model coupling to fermions. 12 refs., 6 figs., 1 tab
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