23,465 research outputs found
Training the imagination to go visiting
Jon Nixon’s article, ‘Learning the Language of Deliberative Democracy’ explored languages of hope in relation to the discourses of deliberative democracy. Ours continues this theme of finding languages of hope. Like his article, ours makes people central. It explores a neglected area of epistemology: knowing people. It suggests that we take a critical perspective on the metaphors we live and then re-configure them to think again about the public and private spaces in the universities where we work
Finding Higgs bosons heavier than 2 m_W in dileptonic W-boson decays
We reconsider observables for discovering a heavy Higgs boson (with m_h >
2m_W) via its di-leptonic decays h -> WW -> l nu l nu. We show that observables
generalizing the transverse mass that take into account the fact that both of
the intermediate W bosons are likely to be on-shell give a significant
improvement over the variables used in existing searches. We also comment on
the application of these observables to other decays which proceed via
narrow-width intermediates.Comment: v1:4 pages, 1 figure; v2: 6 pages, 2 figures, substantially revise
Referential precedents in spoken language comprehension: a review and meta-analysis
Listeners’ interpretations of referring expressions are influenced by referential
precedents—temporary conventions established in a discourse that associate linguistic
expressions with referents. A number of psycholinguistic studies have investigated how
much precedent effects depend on beliefs about the speaker’s perspective versus more
egocentric, domain-general processes. We review and provide a meta-analysis of
visual-world eyetracking studies of precedent use, focusing on three principal effects: (1) a
same speaker advantage for maintained precedents; (2) a different speaker advantage for
broken precedents; and (3) an overall main effect of precedents. Despite inconsistent claims
in the literature, our combined analysis reveals surprisingly consistent evidence supporting
the existence of all three effects, but with different temporal profiles. These findings carry
important implications for existing theoretical explanations of precedent use, and challenge
explanations based solely on the use of information about speakers’ perspectives
A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider
We review the methods which have been proposed for measuring masses of new
particles at the Large Hadron Collider paying particular attention to the
kinematical techniques suitable for extracting mass information when invisible
particles are expected.Comment: 72 pages - in form to be published in JPhys
Application transfer activity in Missouri
Experimental demonstrations and workshop instructional courses were conducted to transfer the technology of satellite remote sensing to a wide audience of resource managers. This audience included planning commissions, state agencies, federal agencies, and special councils of the Governor. Some of the experiments and workshops are outlined
Precision Determination of Invisible-Particle Masses at the CERN LHC: II
We further develop the constrained mass variable techniques to determine the
mass scale of invisible particles pair-produced at hadron colliders. We
introduce the constrained mass variable M_3C which provides an event-by-event
lower bound and upper bound to the mass scale given the two mass differences
between the lightest three new particle states. This variable is most
appropriate for short symmetric cascade decays involving two-body decays and
on-shell intermediate states which end in standard-model particles and two
dark-matter particles. An important feature of the constrained mass variables
is that they do not rely simply on the position of the end point but use the
additional information contained in events which lie far from the end point. To
demonstrate our method we study the supersymmetric model SPS 1a. We select cuts
to study events with two Neutralino_2 each of which decays to Neutralino_1, and
two opposite-sign same-flavor (OSSF) charged leptons through an intermediate
on-shell slepton. We find that with 300 fb^-1 of integrated luminosity the
invisible-particle mass can be measured to M=96.4 +/- 2.4 GeV. Combining fits
to the shape of the M_3C constrained mass variable distribution with the max
m_ll edge fixes the mass differences to +/- 0.2 GeV.Comment: 13 pages, 10 figure
Slip casting and extruding shapes of rhemium with metal oxide additives. Part 2: Development of grain stabilized rhenium parts for resistojets
The adaptation of the powdered particle process used for pure metal oxides to the coprocessing of rhenium oxides suitable to produce pure miniature resistojet hardware has been successful. Both slip casting and extrusion processes were used. The metal oxide ZrO2 was stabilized into the cubic phase with Y2O3, for use as a potentially grain stabilizing additive to rhenium. Straight meter long tubing in two sizes are reported. Tubing suitable for resistojet ohmic heater use of fully fired dimensions of nominally 3.8 mm o.d. x 2.2 mm i.d.. and 1.26 mm o.d. x .45 mm i.d. with 0, 0.5, 1.0 and 5.0% zirconia additives were produced for further study. Photomicrographs of these are discussed. The addition of the metal oxide zirconia to rhenium resulted in more dense and less porous parts. The additions of phase stabilized zirconia most likely act as a sintering aid. Tubes of varying diameter were slip cast which were representative of miniature pressure cases
Re-weighing the evidence for a Higgs boson in dileptonic W-boson decays
We reconsider observables for discovering and measuring the mass of a Higgs
boson via its di-leptonic decays: H --> WW* --> l nu l nu. We define an
observable generalizing the transverse mass that takes into account the fact
that one of the intermediate W-bosons is likely to be on-shell. We compare this
new variable with existing ones and argue that it gives a significant
improvement for discovery in the region m_h < 2 m_W.Comment: 3 pages, 2 figures. Changes in v2: (i) implemented a model of
detector smearing, (ii) switched LHC simulation from 14 TeV to 7 TeV running,
(iii) presenting results for 10 rather than 3 inverse femtobarns, (iv)
corrected a typo in Fig 2 legend. Changes in v3: included published erratu
Slip casting and extruding shapes of rhenium with metal oxide additives. 1: Feasibility demonstration
The feasibility of fabricating small rhenium parts with metal oxide additives by means of slip casting and extrusion techniques is described. The metal oxides, ZrO2 and HfO2 were stabilized into the cubic phase with Y2O3. Additions of metal oxide to the rhenium of up to 15 weight percent were used. Tubes of 17 mm diameter with 0.5 mm walls were slip cast by adapting current ceramic oxide techniques. A complete cast double conical nozzle demonstrated the ability to meet shapes and tolerances. Extrusion of meter long tubing lengths of 3.9 mm o.d. x 2.3 mm i.d. final dimension is documented. Sintering schedules are presented to produce better than 95% of theoretical density parts. Finished machining was found possible were requried by electric discharge machining and diamond grinding
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