نتایج جستجو برای: 0357

تعداد نتایج: 101  

Journal: :Physical review. D, Particles and fields 1995
Binnewies Kniehl Kramer

We present new sets of fragmentation functions for charged pions and kaons, both at leading and next-to-leading order. They are fitted to data on inclusive chargedhadron production in e+e− annihilation taken by TPC at PEP ( √ s = 29 GeV) and to similar data by ALEPH at LEP, who discriminated between events with charm, bottom, and light-flavour fragmentation in their charged-hadron sample. In co...

1996
J. Bartels H. Lotter M. Wüsthoff

We calculate the cross section for the production of two jets with large transverse momenta k in DIS diffractive dissociation for both transverse and longitudinally polarized photons. The scale which defines the hardness of the Pomeron is found to be k Q 2 +M M . We present analytic expressions and discuss numerical results relevant for the diffractive dissociation at HERA. 1.) The diffractive ...

1996
J. Bartels

We investigate the azimuthal distribution of quark-antiquark jets in DIS diffractive dissociation with large transverse momentum. In this kinematical region the matrix element is expressed in terms of the gluon structure function. For the transverse part of the cross section we find a cos(2φ)-distribution with the maximum at φ = ±π/2, i.e. the jets prefer a direction perpendicular to the electr...

Journal: :Physical review. D, Particles and fields 1996
Binnewies Kniehl Kramer

We study inclusive charged-hadron production in collisions of quasireal photons at next-to-leading order (NLO) in the QCD-improved parton model, using fragmentation functions recently extracted from PEP and LEP1 data of e+e− annihilation. We consistently superimpose the direct (DD), single-resolved (DR), and double-resolved (RR) γγ channels. We consider photon spectra generated by electromagnet...

2017
Weixin Cui Wen Xu Qingwen Yang Rong Hu

Histological examination of biopsy shows usefulness in the diagnosis of vocal cord leukoplakia; however, in considerable amount of cases, the examination cannot provide definitive diagnosis of malignancy from benign conditions such as hyperplasia and dysplasia. The present work therefore was aimed to identify clinicopathological factors and molecular markers predictive of recurrence and maligna...

Background & Aims: Aging is associated with gradual erosive changes in the physiological function of many systems of the body. Ths study aimed to examine the physical functioning and limitation and its related factors in people aged 50 and older in Bukan, 2017. Materials & Methods: In this cross-sectional study 1201 elderly people aged 50 years and up were recruited from health recentres in Bu...

ژورنال: مرتع و آبخیزداری 2020

تراکم مهم­ترین شاخص‌ ارزیابی تغییر جمعیت­ گیاهی بوده که روش‌های مختلفی برای اندازه­گیری آن توسعه یافته که ارزیابی دقت هر روش‌ حائز اهمیت زیادی است. برای ارزیابی روش‌های فاصله‌ای اندازه‌گیری تراکم گونه‌های Astragalus verusو  Astragalus albispinusدر مراتع استپی مرجنِ بروجن، مساحتی 32000 مترمربعی به هشت قطعه 4000 مترمربعی تقسیم و نمونه‌برداری شد. در هر قطعه، با شمارش پایه...

Journal: :Thrombosis and haemostasis 2013
John W Eikelboom Jeffrey I Weitz

doi:10.1160/TH13-05-0357 Thromb Haemost 2013; 110: 1 Insight on ▶Perzborn et al. Thromb Haemost 2013; 110: 162-172. Treatment guidelines give preference to new oral anticoagulants (NOACs) over warfarin for stroke prevention in patients with non-valvular atrial fibrillation (AF) because the NOACs are at least as effective as warfarin, but are associated with less life-threatening bleeding and do...

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