Hollow spherical rotors fabricated by electroplating

Equatorial bands are fabricated to provide a locating fit for the hemispheres of hollow spherical rotors which are then jointed by electroplating. Several nonmagnetic materials may be used to form the joint, such as aluminum, copper, iron, gold, plantinum, and zinc

Professional Concerns: Reading and the Vocational/Industrial Arts Teacher

Professional Concerns is a regular column devoted to the interchange of ideas among those interested in reading instruction. Send your comments and contributions to the editor. If you have questions about reading that you wish to have answered) the editor will find respondents to answer them. Address correspondence to R. Baird Shuman) Department of English) University of Illinois at Urbana-Champaign) Urbana) Illinois) 61801

Property Rights in Augmented Reality

Increasingly, cities, towns, and even rural communities are being slowly reshaped by a dynamic yet initially imperceptible phenomenon: the elaboration of augmented reality. Through applications that place virtual features over specific, real-world locations, layers of augmented reality are proliferating, adding new elements to an increasingly wide range of places. However, while many welcome the sudden appearance of arenas for battling digital creatures in their neighborhood or the chance to write virtual messages on their neighbor’s wall, the areas being augmented oftentimes are privately owned, thereby implicating property rights. Many intrusions, of course, are de minimis: an isolated, invisible Pikachu unexpectedly appearing over the GPS coordinates corresponding with one’s home can hardly be labeled a tragedy. Nevertheless, other infringements—such as the inundation of a church’s facade with offensive digital messages or the establishment of a virtual center of commerce in one’s backyard—seem to demand a solution. To date, however, commentators, courts, and litigants have almost universally assumed that property law does not and cannot provide recourse for such intangible invasions. Resisting such expectations, this Essay will argue that not only can property law play a role in augmented reality, but that its application in this context leads naturally to a regime that protects real property owners’ interest in the digital space linked to their property. In the process of so doing, this Essay will illuminate how recognizing real property owners’ right to control relevant parcels of site-specific augmented reality does not mark a novel expansion of property law but accords—and in many ways is dictated by—existing theory and precedent. The project is divided into four parts. Part I provides an overview of augmented reality and its myriad applications, highlighting in the process the concerns many of these applications raise for real property owners. Part II then dissects a number of different property law theories and illustrates how rights to augmented reality—specifically rights inhering in the owner of the corresponding parcel of land—fit comfortably into each one. Finally, Part III analyzes case law supporting the recognition of this new property interest, focusing in particular on the ancient ad coelum and much more recent cyberproperty lines of cases. Part IV offers a brief conclusion

Anisotropic constitutive relationships in energetic materials: PETN and HMX

This paper presents results of first-principles density functional calculations of the equation of state (EOS) of PETN-I and beta-HMX. The isotropic EOS for hydrostatic compression has been extended to include uniaxial compressions in the [100], [010], [001], [110], [101], [011], and [111] directions up to compression ratio V/V0 = 0.70. Equilibrium properties, including lattice parameters and elastic constants, as well as hydrostatic EOS are in good agreement with available experimental data. The shear stresses of uniaxially compressed PETN-I and beta-HMX have been evaluated and their behavior as a function of compression ratio has been used to make predictions of shock sensitivity of these EMs. A comparison of predicted sensitivities with available experimental data has also been performed

First-principles anisotropic constitutive relationships in β-cyclotetramethylene tetranitramine (β-HMX)

First-principles density functional theory calculations have been performed to obtain constitutive relationships in the crystalline energetic material β-cyclotetramethylene tetranitramine (β-HMX). In addition to hydrostatic loading, uniaxial compressions in the directions normal to the {100}, {010}, {001}, {110}, {101}, {011}, and {111} planes have been performed to investigate the anisotropic equation of state (EOS). The calculated lattice parameters and hydrostatic EOS are in reasonable agreement with the available experimental data. The uniaxial compression data show a significant anisotropy in the principal stresses, change in energy, band gap, and shear stresses, which might lead to the anisotropy of the elastic-plastic shock transition and shock sensitivity of β-HMX

Community based trial of home blood pressure monitoring with nurse-led telephone support in patients with stroke or transient ischaemic attack recently discharged from hospital.

BACKGROUND: High blood pressure in patients with stroke increases the risk of recurrence but management in the community is often inadequate. Home blood pressure monitoring may increase patients' involvement in their care, increase compliance, and reduce the need for patients to attend their General Practitioner if blood pressure is adequately controlled. However the value of home monitoring to improve blood pressure control is unclear. In particular its use has not been evaluated in stroke patients in whom neurological and cognitive ability may present unique challenges. DESIGN: Community based randomised trial with follow up after 12 months. PARTICIPANTS: 360 patients admitted to three South London Stroke units with stroke or transient ischaemic attack within the past 9 months will be recruited from the wards or outpatients and randomly allocated into two groups. All patients will be visited by the specialist nurse at home at baseline when she will measure their blood pressure and administer a questionnaire. These procedures will be repeated at 12 months follow up by another researcher blind as to whether the patient is in intervention or control group. INTERVENTION: INTERVENTION patients will be given a validated home blood pressure monitor and support from the specialist nurse. Control patients will continue with usual care (blood pressure monitoring by their practice). Main outcome measures in both groups after 12 months: 1. Change in systolic blood pressure.2. Cost effectiveness: Incremental cost of the intervention to the National Health Service and incremental cost per quality adjusted life year gained

First-principles investigation of anisotropic constitutive relationships in pentaerythritol tetranitrate

First-principles density functional theory (DFT) calculations have been used to obtain the constitutive relationships of pentaerythritol tetranitrate (PETN-I), a crystalline energetic material. The isotropic equation of state (EOS) for hydrostatic compression has been extended to include uniaxial compressions in the , , , , , , and crystallographic directions up to a compression ratio of V/V0=0.70. DFT predicts equilibrium properties such as lattice parameters and elastic constants, as well as the hydrostatic EOS, in agreement with available experimental data. Our results show a substantial anisotropy of various properties of PETN-I upon uniaxial compression. To characterize the anisotropic traits of PETN, different physical properties of the uniaxially compressed crystal such as the energy per atom, band gap, and stress tensor have been evaluated as a function of compression ratio. The maximum shear stresses were calculated and examined for a correlation with the anisotropy in shock-initiation sensitivity

Density functional theory calculations of anisotropic constitutive relationships in alpha-cyclotrimethylenetrinitramine

Constitutive relationships in the crystalline energetic material alpha-cyclotrimethylenetrinitramine (alpha-RDX) have been investigated using first-principles density functional theory. The equilibrium properties of alpha-RDX including unit cell parameters and bulk modulus, as well as the hydrostatic equation of state (EOS), have been obtained and compared with available experimental data. The isotropic EOS has been extended to include the anisotropic response of alpha-RDX by performing uniaxial compressions normal to several low-index planes, {100}, {010}, {001}, {110}, {101}, {011}, and {111}, in the Pbca space group. The uniaxial-compression data exhibit a considerable anisotropy in the principal stresses, changes in energy, band gaps, and shear stresses, which might play a role in the anisotropic behavior of alpha-RDX under shock loading

Integrating Management, Research, and Monitoring: Balancing the 3-Legged Stool

Research and monitoring programs are often thought of as competing with “on the ground management” for attention and funding. This is false trichotomy; instead, it is more appropriate to view management, research, and monitoring as complementary endeavors, in which loss of any 1 of the 3 is disruptive to the remaining 2. There is often significant or even profound uncertainty about the system’s likely response to management, beyond environmental and other sources of uncontrolled variation. Sometimes this uncertainty can be reduced through directed research studies, including experimentation. However, management decisions usually cannot await the completion of elaborate, multiple-year studies. Adaptive resource management (ARM) provides managers a way to make optimal decisions with respect to resource objectives, given the current level of uncertainty about system response, and in anticipation that learning will improve decision-making through time. Under ARM, resource goals and objectives are always paramount and research and monitoring programs exist to provide managers with the tools they need to make better decisions. The essentials of ARM are clear, compelling, and critically needed in natural resource management. We can no longer afford the luxury, if we ever could, of management divorced from research and monitoring, and vice versa. By keeping the focus on management decision-making and resource objective outcomes, ARM places an explicit value on research and monitoring that then can be used to justify monitoring and research programs