نتایج جستجو برای: stressed concrete sleeper b70

تعداد نتایج: 96416  

Journal: :Applied sciences 2021

In booted sleeper floating track systems wherein the concrete bed, rail, and are structurally separated, mismatches can occur between substructure owing to deformations. Nevertheless, mutual behavior substructures has not been studied extensively. To address this limitation, effect of uplift subsidence on deformation a boosted system installed in subway box tunnel was analyzed using finite elem...

2007
Alejandro Frid Lawrence M. Dill Richard E. Thorne Gail M. Blundell

Problem: Infer relative danger from spatially segregated predators in large-scale marine systems, using individual differences in prey foraging behaviour. Mathematical models: Optimization of trade-offs between predation risk and energy gain. Key assumption: Foraging individuals choosing to incur higher risk of predation should experience higher energetic gain than individuals choosing safer fo...

2009
Mihir Bellare Thomas Ristenpart

Waters’ variant of the Boneh-Boyen IBE scheme is attractive because of its efficency, applications, and security attributes, but suffers from a relatively complex proof with poor concrete security. This is due in part to the proof’s “artificial abort” step, which has then been inherited by numerous derivative works. It has often been asked whether this step is necessary. We show that it is not,...

2017
Susan T Harbison Yazmin L Serrano Negron Nancy F Hansen Amanda S Lobell

Why do some individuals need more sleep than others? Forward mutagenesis screens in flies using engineered mutations have established a clear genetic component to sleep duration, revealing mutants that convey very long or short sleep. Whether such extreme long or short sleep could exist in natural populations was unknown. We applied artificial selection for high and low night sleep duration to ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

2015
Cheryl L. Spinweber

(U) The relationship between perceived sleep quality and career effectiveness was studied in Navy corpsmen. Two samples of Naval School of Health Sciences students were asked, "Overall, what kind of sleeper are you?" Based on responses, 506 "good" sleepers and 109 "poor" sleepers were selected for longitudinal study and followed for 6 years. For replication. Sample 2, consisting of 1,024 good a...

Journal: :international journal of civil engineering 0
s. eshghi v. zanjanizadeh

this paper presents an experimental study on seismic repair of damaged square reinforced concrete columns with poor lap splices, 90-degree hooks and widely spaced transverse bars in plastic hinge regions according to aci detailing (pre.1971) and (318-02) using gfrp wraps. three specimens were tested in “as built” condition and retested after they were repaired by glass fiberreinforced plastic s...

Journal: :IACR Cryptology ePrint Archive 2014
Gordon Procter

In this note, we describe an error in the proof for CLRW2 given by Landecker et al. in their paper at CRYPTO 2012 on the beyond-birthday-bound security for tweakable block ciphers. We are able to resolve the issue, give a new bound for the security of CLRW2, and identify a potential limitation of this proof technique when looking to extend the scheme to provide asymptotic security.

2013
Sergej Repin

Abstract: Building processes are associated with impacts on the ground. The ground's ability to resist the load created by structures or to withhold the impact of earth-moving machines is estimated by the plasticity theory methods. The article presents a theoretical analysis of the stressed state of a layer of disc-shaped bulk material. The obtained theoretical models of the minimal, maximal an...

2004
Michael Backes Birgit Pfitzmann Michael Waidner

M. Naor (Ed.): TCC 2004, LCNS 2951, pages 336 352, February 2004. c © Springer-Verlag Berlin Heidelberg 2004. Abstract. We consider compositional properties of reactive systems that are secure in a cryptographic sense. We follow the well-known simulatability approach of modern cryptography, i.e., the specification is an ideal system and a real system should in some sense simulate this ideal one...

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