1,198 research outputs found
Redesigning design education: the next Bauhaus?
This chapter, following an invitation to deliver a keynote address at the inaugural ICSID Educational Seminar 2001 Seongnam, Korea, examines the theme of emerging service design thinking for education. This was also the subject of Young’s collaborative student learning project; ‘Review of a Design Practice Learning Project to Pilot Heightened Social Responsibility and Engagement,’ (with Hilton K). This was presented at EAD, Barcelona in 2003, and further developed in keynote addresses by Young at International Service Design Northumbria conference (ISDn1) at the Sage, Gateshead, March 2006 and ISDn2 at the Centre for Life, Newcastle, November 2006. The subject of new design paradigms and emerging methods is now a co-sponsored PhD between the Design Council and Northumbria’s CfDR (Young & Siodmok supervisors – research funding £32k to support the studentship). This includes a review of the Dott 07 public commission projects. Young’s service design research led to a commission with the ONE NorthEast; Design Innovation Education Centre project in 2003, to develop service design expertise and resources within NE England. Also, to join the AHRC/EPSRC Designing for the 21st Century project; Service Design for Science and Technology SMEs, 2006, based in SAID Business School, Oxford University. Practice-based research using service design methods were deployed to improve the experience of patients of the NHS; this led to Dott 07 sponsoring the Design and Sexual Health project developed by Young with Gateshead PCT and the Strategic Health Authority. Related Northumbria-funded PhD student Lauren Tan working on the future development of design thinking in area of service design and linking to Dott07
A Comparison of External Loads in Division III Men\u27s Lacrosse Between High Competition Matches and Low Competition Matches
Lacrosse is an open field sport with limited knowledge on the demands of gameplay at the Division III level. The purpose of this study was to investigate the external loads on Division III men’s lacrosse players during NCAA season games. Comparisons were made between the external loads placed on the athletes in top competition versus external loads placed on the athletes in low competition matches. Top competition matches were defined as matches against teams that qualified for the NCAA tournament whereas low competition matches included teams that did not meet top competition requirements. The dependent variables measured included total distance, work rate, intensity, 2D load, and 3D load. Defensive players were found to have significantly higher external load values for total distance (m; p=0.003), work rate (m/min; p=0.006 ), intensity (AU; p=0.071), 2D load (AU; p= 0.039 ) and 3D load (AU; p=0.022), while there were no significant differences (p\u3e0.05) for other positions between competition level. Competition level exerts a higher external load for defensive players, but not attack, midfield, or specialists (goalie, face-off, etc), which may indicate the need for specialized conditioning or active load management to deal with potential fatigue
Experimental demonstration of ray-rotation sheets
We have built microstructured sheets that rotate, on transmission, the direction of light rays by an arbitrary, but fixed, angle around the sheet normal. These ray-rotation sheets comprise two pairs of confocal lenticular arrays. In addition to rotating the direction of transmitted light rays, our sheets also offset ray position sideways on the scale of the diameter of the lenticules. If this ray offset is sufficiently small so that it cannot be resolved, our ray-rotation sheets appear to perform generalized refraction
UC-318 Capstone Cybersecurity Website Hardening Group 2-01
The project we were given by Professor Privitera is to secure a web server that is a simulation of a genuine business with our case being a restaurant known as Akwaaba. The business website is hosted on Apache, MariaDB, Red Hat Linux, and PHP. We will first need to explore the network we were given to determine the system’s weaknesses to evaluate the risks and create a proper security policies plan with the help of the National Institute of Standards and Technology (NIST) standards. Following the security plan we created, our group will implement these changes into the network, hardening them to these standards. Finally, we will participate in a red/blue team cybersecurity ethical hacking procedure with our network and the two other teams. We will use white hat hacker skills to gain access to other groups’ networks while protecting our own network by patching up weaknesses if they have been breached
On transversally elliptic operators and the quantization of manifolds with -structure
An -structure on a manifold is an endomorphism field
\phi\in\Gamma(M,\End(TM)) such that . Any -structure
determines an almost CR structure E_{1,0}\subset T_\C M given by the
-eigenbundle of . Using a compatible metric and connection
on , we construct an odd first-order differential operator ,
acting on sections of , whose principal symbol is of the
type considered in arXiv:0810.0338. In the special case of a CR-integrable
almost -structure, we show that when is the generalized
Tanaka-Webster connection of Lotta and Pastore, the operator is given by D
= \sqrt{2}(\dbbar+\dbbar^*), where \dbbar is the tangential Cauchy-Riemann
operator.
We then describe two "quantizations" of manifolds with -structure that
reduce to familiar methods in symplectic geometry in the case that is a
compatible almost complex structure, and to the contact quantization defined in
\cite{F4} when comes from a contact metric structure. The first is an
index-theoretic approach involving the operator ; for certain group actions
will be transversally elliptic, and using the results in arXiv:0810.0338,
we can give a Riemann-Roch type formula for its index. The second approach uses
an analogue of the polarized sections of a prequantum line bundle, with a CR
structure playing the role of a complex polarization.Comment: 31 page
Dense, Fe-rich Ejecta in Supernova Remnants DEM L238 and DEM L249: A New Class of Type Ia Supernova?
We present observations of two LMC supernova remnants (SNRs), DEM L238 and
DEM L249, with the Chandra and XMM-Newton X-ray satellites. Bright central
emission, surrounded by a faint shell, is present in both remnants. The central
emission has an entirely thermal spectrum dominated by strong Fe L-shell lines,
with the deduced Fe abundance in excess of solar and not consistent with the
LMC abundance. This Fe overabundance leads to the conclusion that DEM L238 and
DEM L249 are remnants of thermonuclear (Type Ia) explosions. The shell emission
originates in gas swept up and heated by the blast wave. A standard Sedov
analysis implies about 50 solar masses in both swept-up shells, SNR ages
between 10,000 and 15,000 yr, low (< 0.05 cm^-3) preshock densities, and
subluminous explosions with energies of 3x10^50 ergs. The central Fe-rich
supernova ejecta are close to collisional ionization equilibrium. Their
presence is unexpected, because standard Type Ia SNR models predict faint
ejecta emission with short ionization ages. Both SNRs belong to a previously
unrecognized class of Type Ia SNRs characterized by bright interior emission.
Denser than expected ejecta and/or a dense circumstellar medium around the
progenitors are required to explain the presence of Fe-rich ejecta in these
SNRs. Substantial amounts of circumstellar gas are more likely to be present in
explosions of more massive Type Ia progenitors. DEM L238, DEM L249, and similar
SNRs could be remnants of ``prompt'' Type Ia explosions with young (~100 Myr
old) progenitors.Comment: 24 pages, 8 figures, ApJ, in pres
Dust Destruction in Type Ia Supernova Remnants in the Large Magellanic Cloud
We present first results from an extensive survey of Magellanic Clouds
supernova remnants (SNRs) with the Spitzer Space Telescope. We describe IRAC
and MIPS imaging observations at 3.6, 4.5, 5.8, 8, 24, and 70 microns of four
Balmer-dominated Type Ia SNRs in the Large Magellanic Cloud (LMC): DEM L71
(0505-67.9), 0509--67.5, 0519--69.0, and 0548-70.4. None was detected in the
four short-wavelength IRAC bands, but all four were clearly imaged at 24
microns, and two at 70 microns. A comparison of these images to Chandra
broadband X-ray images shows a clear association with the blast wave, and not
with internal X-ray emission associated with ejecta. Our observations are well
described by 1-D shock models of collisionally heated dust emission, including
grain size distributions appropriate for the LMC, grain heating by collisions
with both ions and electrons, and sputtering of small grains. Model parameters
are constrained by X-ray, optical, and far-ultraviolet observations. Our models
can reproduce observed 70/24 micron flux ratios only by including sputtering,
destroying most grains smaller than 0.03-0.04 microns in radius. We infer total
dust masses swept up by the SNR blast waves, before sputtering, of order 0.01
solar masses, several times less than those implied by a dust/gas mass ratio of
0.3 percent as often assumed for the LMC. Substantial dust destruction has
implications for gas-phase abundances.Comment: 11 pages, 1 figure, submitted to the Astrophysical Journal Letter
Deformation Associated with Ghost Craters and Basins in Volcanic Smooth Plains on Mercury: Strain Analysis and Implications for Plains Evolution
Since its insertion into orbit about Mercury in March 2011, the MESSENGER spacecraft has imaged most previously unseen regions of the planet in unprecedented detail, revealing extensive regions of contiguous smooth plains at high northern latitudes and surrounding the Caloris basin. These smooth plains, thought to be emplaced by flood volcanism, are populated with several hundred ghost craters and basins, nearly to completely buried impact features having rims for which the surface expressions are now primarily rings of deformational landforms. Associated with some ghost craters are interior groups of graben displaying mostly polygonal patterns. The origin of these graben is not yet fully understood, but comparison with numerical models suggests that the majority of such features are the result of stresses from local thermal contraction. In this paper, we highlight a previously unreported category of ghost craters, quantify extensional strains across graben-bearing ghost craters, and make use of graben geometries to gain insights into the subsurface geology of smooth plains areas. In particular, the style and mechanisms of graben development imply that flooding of impact craters and basins led to substantial pooling of lavas, to thicknesses of ∼1.5 km. In addition, surface strains derived from groups of graben are generally in agreement with theoretically and numerically derived strains for thermal contraction
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