1,183 research outputs found
Electronic Security Implications of NEC: A Tactical Battlefield Scenario
No full textIn [1] three principal themes are identified by the UK MoD (Ministry of Defence) in order to deliver the vision of NEC (Network Enabled Capability): Networks, People and Information. It is the security of information, which is discussed in this article. The drive towards NEC is due to many factors; one defining factor is to provide an increase in operational tempo in effect placing one ahead of their enemy in terms of acting within their OODA (Observe, Orient, Decide, Act) loop. However as technical and procedural systems are being advanced to achieve the vision of NEC, what impact does this have on the traditional information security triangle, of preserving the confidentiality, integrity and availability of information? And how does this influence current security engineering and accreditation practices, particularly in light of the proliferation problem? This article describes research conducted into answering these questions, building upon the findings of the NITEworks® [2] ISTAR (Intelligence, Surveillance, Target Acquisition and Reconnaissance) Theme studies and focusing on a tactical battlefield scenario. This scenario relates to the IFPA (Indirect Fire Precision Attack) [3] project where the efficient synchronisation of potentially numerous sources of information is required, providing real-time decisions and delivery of effects, in accordance with the requirements of NEC. It is envisaged that the IFPA systems will consist of numerous sub-systems each of which will provide a unique effecting capability to the UK army with differing levels of speed, accuracy and range
Beauty in photoproduction at HERA II with the ZEUS detector
No full textThe production of beauty quarks in ep collisions should be accurately calculable in perturbative
Quantum Chromodynamics (QCD) since the large mass of the b quark provides a hard scale.
Therefore it is interesting to compare such predictions to results using photoproduction events
where a low-virtuality photon, emitted by the incoming lepton, collides with a parton from the
incoming proton. A measurement of beauty in photoproduction has been made at HERA with the
ZEUS detector using an integrated luminosity of 126 pb−1. Beauty was identified in events with
a muon in the final state by using the transverse momentum of the muon relative to the closest
jet. Lifetime information from the silicon vertex detector was also used; the impact parameter
of the muon with respect to the primary vertex was exploited to discriminate between signal
and background. Cross sections for beauty production as a function of the muon and the jet
variables were measured and compared to QCD predictions and to previous measurements. The
data were found to be well described by the predictions from next-to-leading-order QCD. The dijet
sample of beauty photoproduction events was also used to study higher-order QCD topologies. At
leading order, the two jets in the event are produced back-to-back in azimuthal angle, such that
\Delta\phi^j^j=\phi^j^1-\phi^j^2=\pi. Additional soft radiation causes small azimuthal decorrelations, whilst
\Delta\phi^j^j significantly lower than \pi is evidence of additional hard radiation. In this thesis, the cross
section versus \Delta\phi^j^j for beauty photoproduction and the comparison to NLO QCD predictions and
Monte Carlo models are presented
Who paints the house? Scotswomen as housepainters and decorators from 1820
No full textIn the early 21st century it is still considered unusual to find a woman in paid employment as a skilled housepainter and decorator. Tradeswomen, in these most domestic of building trades, were working throughout Scotland during the 19th and 20th centuries. The women were those whose work self-identities were sufficiently strong to be recorded in directories and census returns. These are women who worked, not middle class or amateur women interior decorators dabbling in the arts and crafts because it was fashionable. The historical record is compared with contemporary records of women taking paid employment in these fields and also with the strong market created in modern times by the many TV DIY programmes encouraging women into DIY. The high level of present and past involvement of women in house-painting and decorating shows that the aptitude and ability exists at both the professional and amateur levels. The factual reality is compared with perception and prejudice within the industry and the barriers that were and are placed in front of women wishing to do this work
Exonephology : transmission spectra from a 3D simulated cloudy atmosphere of HD 209458b
Get PDFS. Lines and J. Goyal are funded by and thankful to the Leverhulme Trust. N. J. Mayne is part funded by a Leverhulme Trust Research Project Grant. J. Manners and I. A. Boutle acknowledge the support of a Met Office Academic Partnership secondment. B. Drummond acknowledges funding from the European Research Council (ERC) under the European Unions Seventh Framework Programme (FP7/2007-2013) / ERC grant agreement no. 336792. G. K. H. Lee acknowledges support from the Universities of Oxford and Bern through the Bernoulli fellowship program. A. L. Carter is funded by a Science and Technology Facilities Council (STFC) studentship.We present high-resolution transmission spectra, calculated directly from a 3D radiative hydrodynamic simulation that includes kinetic cloud formation, for HD 209458b. We find that the high opacity of our vertically extensive cloud deck, composed of a large number density of sub-μm particles, flattens the transmission spectrum and obscures spectral features identified in the observed data. We use the PANDEXO simulator to explore features of our HD 209458b spectrum which may be detectable with the James Webb Space Telescope. We determine that an 8-12μm absorption feature attributed to the mixed-composition, predominantly silicate cloud particles is a viable marker for the presence of cloud. Further calculations explore, and trends are identified with, variations in cloud opacity, composition heterogeneity, and artificially scaled gravitational settling on the transmission spectrum. Principally, by varying the upper extent of our cloud decks, rainout is identified to be a key process for the dynamical atmospheres of hot Jupiters and shown to dramatically alter the resulting spectrum. Our synthetic transmission spectra, obtained from the most complete, forward atmosphere simulations to date, allow us to explore the model's ability to conform with observations. Such comparisons can provide insight into the physical processes either missing or requiring improvement.Peer reviewe
Probing color coherence effects in pp collisions at √s = 7 TeV
Get PDFOpen Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the
source are credited. Funded by SCOAP3 / License Version CC BY 4.0.A study of color coherence effects in pp collisions at a center-of-mass energy of 7TeV is presented. The data used in the analysis were collected in 2010 with the CMS detector at the LHC and correspond to an integrated luminosity of 36 pb-1. Events are selected that contain at least three jets and where the two jets with the largest transverse momentum exhibit a back-to-back topology. The measured angular correlation between the second- and third-leading jet is shown to be sensitive to color coherence effects, and is compared to the predictions of Monte Carlo models with various implementations of color coherence. None of the models describe the data satisfactorily.BMWF and FWF (Austria); FNRS and FWO(Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil);MES
(Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF(Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland);
CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of
Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, andUASLPFAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR(Russia);MESTD (Serbia); SEIDI and CPAN(Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter, IPST, STAR and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA)
Measurement of WZ and ZZ production in pp collisions at √s = 8 TeV in final states with b-tagged jets
Get PDFOpen Access This article is distributed under the terms of the Creative
Commons Attribution License which permits any use, distribution, and
reproduction in any medium, provided the original author(s) and the
source are credited.
Funded by SCOAP3 / License Version CC BY 4.0.Measurements are reported of the WZ and ZZ production cross sections in proton-proton collisions at s √ =8 TeV in final states where one Z boson decays to b-tagged jets. The other gauge boson, either W or Z, is detected through its leptonic decay (either W→eν , μν or Z→e + e − , μ + μ − , or νν ¯ ). The results are based on data corresponding to an integrated luminosity of 18.9 fb −1 collected with the CMS detector at the Large Hadron Collider. The measured cross sections, σ(pp→WZ)=30.7±9.3(stat.)±7.1(syst.)±4.1(th.)±1.0(lum.)pb and σ(pp→ZZ)=6.5±1.7(stat.)±1.0(syst.)±0.9(th.)±0.2(lum.)pb , are consistent with next-to-leading order quantum chromodynamics calculationsBMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil);
MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CS (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF(Germany);GSRT(Greece);OTKAand NIH(Hungary);DAEand DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania);MOE and UM(Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland);
NSC (Taipei); ThEPCenter, IPST, STAR and NSTDA(Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA)
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