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1866466 documents, page 1 of 186647

Rank of elliptic curves associated to the Brahmagupta quadrilaterals

Izadi, Farzali; Khoshnam, Foad; Zargar, Arman Shamsi (2015)
In this paper, we construct a family of elliptic curves of rank at least five. To do so, we use the Brahmagupta formula for the area of cyclic quadrilaterals $(p^3,q^3,r^3,q^3)$ not necessarily standing for the genuine sides of quadrilaterals. It turns out that, as parameters of the curves, the integers $p,q,r,s$, along with the extra integers $u$, $v$ satisfy $u^6+v^6+p^6+q^6=2(r^6+s^6)$, $uv=pq$. However, we utilize a subset of the solutions of the above system via the rational points of a ...

Constructing New Braided $T$-Categories via Weak Monoidal Hom-Hopf Algebras

Wang, Wei; Wang, Shuanhong; Zhang, Xiaohui (2015)
In this paper, we define and study weak monoidal Hom-Hopf algebras, which generalize both weak Hopf algebras and monoidal Hom-Hopf algebras. If $H$ is a weak monoidal Hom-Hopf algebra with bijective antipode and let $Aut_{wmHH}(H)$ be the set of all automorphisms of $H$. Then we introduce a category ${_{H}\mathcal{WMHYD}^{H}}(\alpha,\beta)$ with $\alpha,\beta\in Aut_{wmHH}(H)$ and construct a braided $T$-category $\mathcal{WMHYD}(H)$ that having all the categories ${_{H}\mathcal{WMHYD}^{H}}(\...

Preparing for and Observing the 2017 Total Solar Eclipse

Pasachoff, Jay (2015)
I discuss ongoing plans and discussions for EPO and scientific observing of the 21 August 2017 total solar eclipse. I discuss aspects of EPO based on my experiences at the 60 solar eclipses I have seen. I share cloud statistics along the eclipse path compiled by Jay Anderson, the foremost eclipse meteorologist. I show some sample observations of composite imagery, of spectra, and of terrestrial temperature changes based on observations of recent eclipses, including 2012 from Australia and 201...

Bounding Causal Effects in an Ecological Inference Problem: the Chilean Electoral Reform

Corvalan, Alejandro; Melo, Emerson; Sherman, Robert; Shum, Matthew (2015)
This paper is concerned with making causal inferences with ecological data. Aggregate outcome information is combined with individual demographic information from separate data sources to make causal inferences about individual behavior. In addressing such problems, even under the selection on observables assumption often made in the treatment effects literature, it is not possible to identify causal effects of interest. However, recent results from the partial identification literature provi...

The ATLAS jet trigger performance in LHC Run I and Run II updates

Shimizu, Shima (2015)
The Large Hadron Collider (LHC) provides proton-proton collisions with a high frequency of 40 MHz maximum and the ATLAS trigger performs the first event selections online during data-taking. The ATLAS jet trigger is an important element of the ATLAS trigger, selecting collision events with jets with high transverse energy, and provides data samples for studies of Standard Model physics and searches for new physics at the LHC. During LHC Run I, the first LHC operation period from 2010 to 2012,...

Energy Reconstruction and high-speed Data Transmission with FPGAs for the Upgrade of the ATLAS Liquid Argon Calorimeter at LHC

Stärz, Steffen; Straessner, Arno (2015)
The Liquid Argon calorimeter of the ATLAS detector at CERN near Geneva is equipped with improved readout and trigger electronics for the operation at higher luminosity LHC in the frame of several upgrades (Phase-0, I, and II). Special attention is given to an early digitisation of detector raw data and their following digital data transmission and processing via FPGAs already for the Level-1 trigger. The upgrades additionally foresee to provide higher spatial granularity information for the L...

RF Design of the TW Buncher for the CLIC Drive Beam Injector

Shaker, H (2015)
The CLIC is based on the two beams concept that one beam (drive beam) produces the required RF power to accelerate another beam (main beam). The drive beam is produced and accelerated up to 50MeV inside the CLIC drive beam injector. The drive beam injector main components are a thermionic electron gun, three sub harmonic bunchers, a pre-buncher, a TW buncher, 13 accelerating structures and one magnetic chicane. This document is the first report of the RF structure design of the TW buncher. Th...

Operational Experience and Performance of the Present ALICE ITS

Senyukov, Serhiy (2015)
ALICE (A Large Ion Collider Experiment) is one of four major experiments at the CERN LHC. ALICE studies strongly interacting matter under extreme conditions created in heavy ion colli- sions. The Inner Tracking System (ITS) is an essential part of the ALICE detector. It is used for tracking, reconstruction of primary and secondary vertices and particle identification. ITS is composed of six cylindrical layers of silicon detectors. Three different techologies are used: hybrid pixel, drift and ...

Marketingresistenz in Industrieunternehmen

Belz, Christian (2015)
Marketingresistenz in der Industrie betrifft nicht alle Anbieter, bleibt aber erstaunlich verbreitet. Es lohnt sich aber, die Lösungen in Marketing und Vertrieb professionell zu gestalten. Treiber für den Erfolg von industriellen Anbietern sind oft die Technik und damit verbunden innovative Produkte. Führungskräfte und Mitarbeitende sind stolz auf ihre technische Expertise. Unternehmen fokussieren sich auf technisch überlegene Lösungen in einzelnen Kundenprojekten. Techniker des Lieferant...

As above, so below: triangulating drone culture

Coley, Rob; Lockwood, Dean (2015)
The terms of popular debate concerning the drone and drone power have been quickly established. Debate typically centres around a set of issues which include: the diffusion of the conventional battlefield and the muddying of ‘territory’; the supposed precision of surgical strikes, or as the US military has it, ‘putting warheads on foreheads’ (Chamayou, 2015: 141); and the system of seeing and killing from thousands of miles away, with the accompanying debates concerning, on one hand, the invu...