NonQCD contributions to heavy quark masses and sensitivity to Higgs mass

We find that if the Higgs mass is close to its present experimental lower limit (100 GeV),Yukawa interactions in the quark-Higgs sector can make substantial contributions to the heavy quark MS masses.Comment: 16 pages, 1 figure. Fixed a few typos (eqs (7),(34)

Investigating invisible writing practices in the engineering curriculum using practice architectures

Writing practices are seen to be essential for professional engineers, yet many engineering students and academics struggle with written communication, despite years of interventions to improve student writing. Much has been written about the importance of getting engineering students to write, but there has been a little investigation of engineering academics’ perceptions of writing practices in the curriculum, and the extent to which these practices are visible to their students and to the academics. This paper draws on research from an ongoing study into the invisibility of writing practices in the engineering curriculum using a practice architectures lens. The paper uses examples from the sites of practice of two participants in the study to argue that prevailing practices in engineering education constrain more than enable the development and practice of writing in the engineering curriculu

Who’s Buried in Custer’s Grave?

On 10 October 1877, the year after the Battle of the Little Bighorn, General George A. Custer’s coffin was transported from a temporary grave in Poughkeepsie, NY, by steamer and cortege to permanent interment in the U.S. Military Academy’s Post Cemetery. The ceremony included the appropriate military and funerary rituals. There were, nevertheless, reasons to believe that Custer’s skeleton may not have been in the coffin—thus, he may have missed his own funeral. Custer’s remains, or part of them, may have been overlooked during the exhumation and left on the battlefield, only to be recovered around 1940. These bones, as well as those of another individual, were unceremoniously buried in a grave which is now marked “Two Unknown U.S. Soldiers” in the National Cemetery adjacent to the Little Bighorn Battlefield in Montana. That cemetery, perhaps appropriately enough, is named the Custer National Cemetery. This paper presents information concerning Custer’s original interment on the Little Bighorn Battlefield, his supposed disinterment, and the osteological evidence that his remains, or at least part of them, were left on the Little Bighorn Battlefield

Who’s Buried in Custer’s Grave?

On 10 October 1877, the year after the Battle of the Little Bighorn, General George A. Custer’s coffin was transported from a temporary grave in Poughkeepsie, NY, by steamer and cortege to permanent interment in the U.S. Military Academy’s Post Cemetery. The ceremony included the appropriate military and funerary rituals. There were, nevertheless, reasons to believe that Custer’s skeleton may not have been in the coffin—thus, he may have missed his own funeral. Custer’s remains, or part of them, may have been overlooked during the exhumation and left on the battlefield, only to be recovered around 1940. These bones, as well as those of another individual, were unceremoniously buried in a grave which is now marked “Two Unknown U.S. Soldiers” in the National Cemetery adjacent to the Little Bighorn Battlefield in Montana. That cemetery, perhaps appropriately enough, is named the Custer National Cemetery. This paper presents information concerning Custer’s original interment on the Little Bighorn Battlefield, his supposed disinterment, and the osteological evidence that his remains, or at least part of them, were left on the Little Bighorn Battlefield

First-Year Movements by Juvenile Mexican Spotted Owls in the Canyonlands of Utah

We studied first-year movements of Mexican Spotted Owls (Strix occidentalis lucida) during natal dispersal in canyonlands of southern Utah. Thirty-one juvenile Mexican Spotted Owls were captured and radiotracked during 1992-95 to examine behavior and conduct experiments related to the onset of natal dispersal. Juvenile Spotted Owls dispersed from their nest areas during September to October each year, with 85% leaving in September. The onset of movements was sudden and juveniles dispersed in varied directions. The median distance from nest area to last observed location was 25.7 km (range = 1.7-92.3 km). Three of 26 juveniles tracked (11%) were alive after one year, although none were observed with mates. We conducted a feeding experiment, using Mongolian gerbils (Meriones unguicuculatus), to test the influence of increased food supply on dispersal onset. The mean dispersal date of five owls that received supplemental food Julian day no. 255 +/- 2.6 SD) was significantly different than a control group (day no. 273 +/- 12.3)

Antiviral Inhibition of Enveloped Virus Release by Tetherin/BST-2: Action and Counteraction

Tetherin (BST2/CD317) has been recently recognized as a potent interferon-induced antiviral molecule that inhibits the release of diverse mammalian enveloped virus particles from infected cells. By targeting an immutable structure common to all these viruses, the virion membrane, evasion of this antiviral mechanism has necessitated the development of specific countermeasures that directly inhibit tetherin activity. Here we review our current understanding of the molecular basis of tetherin’s mode of action, the viral countermeasures that antagonize it, and how virus/tetherin interactions may affect viral transmission and pathogenicity

Evaluation of wildlife Guards at Access Roads

The reconstruction of 90.6 km of U.S. Highway 93 from Evaro to Polson, MT on the Flathead Indian Reservation includes 41 fish and wildlife crossing structures and 13.4 km of road with wildlife fencing. These measures are aimed at reducing wildlife–vehicle collisions, while allowing wildlife to cross the road. In fenced road sections, gaps for side roads are mitigated by wildlife guards (similar to cattle guards). We focused on a 1-km fenced section where animals can either cross the road using five crossing structures (4 culverts, 1 bridge), or they can access the road through two guards on the east side and cross using jump-outs, i.e., earthen ramps that allow animals in fenced areas to jump down to safety, on the west side. We monitored wildlife movements with cameras at the two guards and in one large crossing structure adjacent to a guard. We investigated how effective these guards are in keeping deer (Odocoileus spp.) from accessing the road. We also compared movements across a guard to those through a crossing structure. The guards were 85 percent or more effective in keeping deer from accessing the road, and 93.5 percent of deer used the crossing structure instead of an adjacent guard when crossing the road. Though the guards were not an absolute barrier to deer, the results indicated that deer were substantially discouraged from crossing the guards, and the vast majority crossed the road using the crossing structure rather than the guard, indicating that guards are an effective means of mitigation

PharOS, a multicore OS ready for safety-related automotive systems: results and future prospects

International audienceAutomotive electrical/electronic architectures need to perform more and more functions that are mapped onto many different electronic control units (ECU) because of their different safety levels or different application domains (body, powertrain, multimedia, etc.). Freedom of interference is required to comply with the upcoming ISO 26262 standard for mixing different ASIL levels on the same ECU and is also required to cope with the safe integration of software from different suppliers. PharOS provides dedicated software partitioning mechanisms as well as controlled and efficient resource sharing by construction, from the design to the implementation stages. The main features of PharOS, contributing to this property, are presented in this paper as well as the results on its application an industry-driven case study and associated future prospects

Anomalies in Ward Identities for Three-Point Functions Revisited

A general calculational method is applied to investigate symmetry relations among divergent amplitudes in a free fermion model. A very traditional work on this subject is revisited. A systematic study of one, two and three point functions associated to scalar, pseudoscalar, vector and axial-vector densities is performed. The divergent content of the amplitudes are left in terms of five basic objects (external momentum independent). No specific assumptions about a regulator is adopted in the calculations. All ambiguities and symmetry violating terms are shown to be associated with only three combinations of the basic divergent objects. Our final results can be mapped in the corresponding Dimensional Regularization calculations (in cases where this technique could be applied) or in those of Gertsein and Jackiw which we will show in detail. The results emerging from our general approach allow us to extract, in a natural way, a set of reasonable conditions (e.g. crucial for QED consistency) that could lead us to obtain all Ward Identities satisfied. Consequently, we conclude that the traditional approach used to justify the famous triangular anomalies in perturbative calculations could be questionable. An alternative point of view, dismissed of ambiguities, which lead to a correct description of the associated phenomenology, is pointed out.Comment: 26 pages, Revtex, revised version, Refs. adde