10,543 research outputs found

    Combined Partial Wave Analysis for the description of exclusive p+p→p+K++Λp+p \to p + K^+ + \Lambda production

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    The production of p K+ {\Lambda} in elementary p + p collision was investigated using the Bonn Gatchina Partial Wave Analysis framework. This approach allows the determination of possible participating production wave depending on the quantum numbers of the system. For the analysis seven data samples, measured at different detectors and beam energies, were used.For the extraction of the p{\Lambda} scattering length a cross check with established methods is required. Furthermore the total cross section of the production process is needed to be determined to extra cross section for the separate waves. Both methods are described in this work.Comment: 4 pages, 2 figure

    Mass formula for T=0 and T=1 ground states of N=Z nuclei

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    An algebraic model is developed to calculate the T=0 and T=1 ground state binding energies for N=Z nuclei. The method is tested in the sd shell and is then extended to 28-50 shell which is currently the object of many experimental studies.Comment: 5 figure

    GSFC preferred parts lists PPL-17

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    A listing of preferred parts, part upgrading procedures, part derating guidelines, and part screening procedures to be used in the selection, procurement, and application of parts for Goddard Space Flight Center (GSFC) space systems and ground support equipment is contained

    Pressure induced magnetic phase separation in La0.75_{0.75}Ca0.25_{0.25}MnO3_{3} manganite

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    The pressure dependence of the Curie temperature TC(P)_{C}(P) in La0.75_{0.75}Ca0.25_{0.25}MnO3_{3} was determined by neutron diffraction up to 8 GPa, and compared with the metallization temperature TIM(P)_{IM}(P) \cite{irprl}. The behavior of the two temperatures appears similar over the whole pressure range suggesting a key role of magnetic double exchange also in the pressure regime where the superexchange interaction is dominant. Coexistence of antiferromagnetic and ferromagnetic peaks at high pressure and low temperature indicates a phase separated regime which is well reproduced with a dynamical mean-field calculation for a simplified model. A new P-T phase diagram has been proposed on the basis of the whole set of experimental data.Comment: 5 pages, 4 figure

    The association between Occlusion Time and Temporomandibular Disorders

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    Introduction: Recently, some published studies show there is a multifactorial origin for Temporomandibular Disorders, but the dental occlusion's contribution to the development of Temporomandibular Disorders, and how it may influence the adaptive capacity of the Stomatognathic system, it's still unclear. The aim of this study is to evaluate the correlation between the Occlusion Time and Temporomandibular Disorders. Methods: A total of 54 patients were enrolled in the study (24 males and 30 females, mean age 27.94±8.21years). The TMD group (8 males and 10 females) consisted of subjects who presented with at least 1 of the following signs of Temporomandibular Disorders: Temporomandibular Joint sounds (clicking or crepitation), Temporomandibular Joint locking episodes, limited mandibular opening, painful limitation of mandibular movements, pain to palpation of the Temporomandibular Joint or of the masticatory muscles. The control group (16 males and 20 females) presented as free from Temporomandibular Disorders. The T-Scan III computerized occlusal analysis system was to record the subjects' Occlusion. Times during eight mandibular opening-closing movements. Results: The two-ways ANOVA test analyzed the variations for group and sex, showing that the TMD group mean Occlusion Time (0.64±0.21s) was statistically significantly longer than the control group mean Occlusion Time (0.45±0.17s) (p<0.001). Significant differences were also found for gender where the mean OT of female subjects was longer than males one with statistical significance (p-value<0.01). Conclusions: The computerized analysis of the Occlusion Time in patients affected by TMJ problems has to be carefully considered as adjunctive instrumental device
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