1,250 research outputs found
Extended enterprise architecture with the FADEE.
Business-to-Business integration (B2Bi) is considered to be not merely an IT-issue, but also a business problem. This paper draws attention to the challenges companies within an Extended Enterprise are confronted with when integrating their systems. We primarily pay attention to coordination problems that may arise. To overcome these problems we propose the use of Enterprise Architecture descriptions. We discuss the powers of using Enterprise Architecture descriptions in integration exercises. It will become clear that doing Enterprise Architecture is no longer an option; it is mandatory. Furthermore, we present the FADEE, the Framework for the Architectural Description of the Extended Enterprise. This framework gives an overview of how companies can apply the Zachman framework to do Enterprise Architecture in the realm of the Extended Enterprise.Architecture; Business-to-Business integration; Companies; Coordination; Enterprise architecture; Extended enterprise; Extended enterprise architecture framework; FADEE; Framework; Integration; Problems; Research; Systems;
Scattering Rates For Leptogenesis: Damping of Lepton Flavour Coherence and Production of Singlet Neutrinos
Using the Closed-Time-Path approach, we perform a systematic leading order
calculation of the relaxation rate of flavour correlations of left-handed
Standard Model leptons. This quantity is of pivotal relevance for flavoured
Leptogenesis in the Early Universe, and we find it to be 5.19*10^-3 T at T=10^7
GeV and 4.83*10^-3 T at T=10^13 GeV. These values apply to the Standard Model
with a Higgs-boson mass of 125 GeV. The dependence of the numerical coefficient
on the temperature T is due to the renormalisation group running. The leading
linear and logarithmic dependencies of the flavour relaxation rate on the gauge
and top-quark couplings are extracted, such that the results presented in this
work can readily be applied to extensions of the Standard Model. We also derive
the production rate of light (compared to the temperature) sterile right-handed
neutrinos, a calculation that relies on the same methods. We confirm most
details of earlier results, but find a substantially larger contribution from
the t-channel exchange of fermions.Comment: 43 pages, 11 figure
The Role of IT/Business Alignment for Achieving SOA Business Value - Proposing a Research Model
What is the interplay between IT/Business alignment and Service-oriented Architecture (SOA) regarding the achievement of business value in terms of business flexibility? This paper introduces a conceptual model that derives propositions about how IT/Business alignment, IT flexibility, and business flexibility are interrelated and how SOA and alignment interact in order to increase business flexibility. We apply and integrate well-known multi-dimensional concepts of both IT/Business alignment (in terms of strategic alignment, structural alignment, and social alignment) and IT flexibility (technical and non-technical IT flexibility) and map the conceptual components of SOA (architectural and the governance dimension) to this resulting model. This conceptualization will allow for more profoundly structured research on how SOA contributes to business value
Cooled Liquid Rocket Thrust Chamber
Cooling may affect the thrust output of a small-scale rocket. Little research is published about small-scale rocket performance. We hypothesize the thrust produced varies as the amount of cooling varies. To facilitate assessing this hypothesis, we have designed and built a liquid rocket engine rated for at approximately 25 lbf of thrust. Our objective was to build in parallel with Cal Poly Space Systems, who built a rocket engine with similar specifications except without cooling. Our challenge is to integrate film cooling, so that the effects of cooling may be compared to Cal Poly Space System’s engine which has no cooling. The results will allow for analysis of the effects of cooling on the thrust output of small-scale rocket engines. Utilizing a stacked injector plate design to solve our pressure-drop issues and consequently also solve our mass flowrate issues, we performed more preliminary calculations to justify our decision. We determined suitable material choices with desirable material properties such as the coefficient of thermal expansion and thermal conductivity for our design to be 303 stainless-steel and copper alloy 110. We decided on utilizing copper alloy 110 for our nozzle and combustion chamber, 6061 aluminum for our top injector plate, mild steel for our retaining ring, and 303 stainless-steel for our bottom injector plate. Our finished prototype will be utilized by Cal Poly Space Systems to aid their investigation of the effects of the effects of film cooling on the thrust output of small-scale rocket engines. Hot fire attempts were unsuccessful and resulted in only 15ms of combustion. Recommend more heat to the ignition system to produce self-sustaining combustion to get more effective results in the future
Visualization of microtubule growth in cultured neurons via the use of EB3-GFP (end-binding protein 3-green fluorescent protein)
Several microtubule binding proteins, including CLIP-170 (cytoplasmic
linker protein-170), CLIP-115, and EB1 (end-binding protein 1), have been
shown to associate specifically with the ends of growing microtubules in
non-neuronal cells, thereby regulating microtubule dynamics and the
binding of microtubules to protein complexes, organelles, and membranes.
When fused to GFP (green fluorescent protein), these proteins, which
collectively are called +TIPs (plus end tracking proteins), also serve as
powerful markers for visualizing microtubule growth events. Here we
demonstrate that e
The evolution of the cosmic molecular gas density
One of the last missing pieces in the puzzle of galaxy formation and
evolution through cosmic history is a detailed picture of the role of the cold
gas supply in the star-formation process. Cold gas is the fuel for star
formation, and thus regulates the buildup of stellar mass, both through the
amount of material present through a galaxy's gas mass fraction, and through
the efficiency at which it is converted to stars. Over the last decade,
important progress has been made in understanding the relative importance of
these two factors along with the role of feedback, and the first measurements
of the volume density of cold gas out to redshift 4, (the "cold gas history of
the Universe") has been obtained. To match the precision of measurements of the
star formation and black-hole accretion histories over the coming decades, a
two orders of magnitude improvement in molecular line survey speeds is required
compared to what is possible with current facilities. Possible pathways towards
such large gains include significant upgrades to current facilities like ALMA
by 2030 (and beyond), and eventually the construction of a new generation of
radio-to-millimeter wavelength facilities, such as the next generation Very
Large Array (ngVLA) concept.Comment: 7 pages, 2 figures, Science White paper submitted to Astro2020
Decadal Surve
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