9,700 research outputs found
�Beam me up, Scotty! - Teleportation, and Personal Identity
Near the end of the Nineteenth Century a Prussian
woman arrived at her local telegraph office with a bowl of
sauerkraut she wanted sent to her son. She insisted that,
if soldiers could be sent to the front by telegraph, certainly
her sauerkraut could be sent the same way. (Standage,
1998)
The Prussian woman thought that communication
and transportation could coincide. She may have been
correct. In 1993 an IBM scientist, Charles H. Bennett,
predicted that quantum teleportation is possible, but only if
the original object is destroyed. More recently, in October,
1998, Caltech scientist H. Jeff Kimble succeeded in
instantaneously transporting information contained in the
quantum state of a photon one meter across a lab bench
without it traversing any physical medium in between.
Kimble and his colleagues used an extremely delicate
quantum mechanical phenomenon, �quantum
entanglement.� Kimble"s findings suggest that
teleportation of the sort depicted in the Star Trek television
series and movies is theoretically possible
High-density nuclear matter with nonlocal confining solitons
An infinite system of nonlocal, individually confining solitons is considered
as a model of high-density nuclear matter. The soliton-lattice problem is
discussed in the Wigner-Seitz approximation. The cell size is varied to study
the density dependence of physical quantities of interest. A transition to a
system where quarks can migrate between solitons is found. We argue that this
signals quark deconfinement. The model is applied to the calculation of
selected in-medium properties.Comment: 23 pages with 10 figure
Response of three species of woody ornamental plantes under various ecological regimes in Tennessee
A study of the response of three species of woody ornamental plants, Mahonia pinnata, Buxus sempervirens, and Taxus media browni,was initiated in 1967 to determine how these plants would respond to(1) directional exposure; (2) background color; and (3) different climatic regimes of Tennessee. Mahonia pinnata plants placed at the north exposure had longer lives than those at the south and west exposure and were taller and had less winter burn than those at the west exposure. Leaves were longer at Crossville than at Jackson, Knoxville, and Spring Hill.Mahonia pinnata plants at Knoxville had a greater increase in height and a greater maximum width than did those at any of the other locations.Taxus media browni plants at the north exposure had (1) greater increase in height than those at the east exposure; (2) longer shoots and a greater increase in width than those at the south exposure; (3) a darker green color than those at the east, south, and west exposures.Buxus sempervirens plants were darker green at the north exposure than at the west and south exposures and had a greater increase in height and had longer shoots at Knoxville than at any of the otherlocations.The south and west exposures had a greater yearly mean of the weekly maximum temperatures than did the east and north exposures. The south, west, and east exposures had a greater summer mean of the weekly maximum temperatures than did the north exposure. Spring Hill Had the highest yearly and summer mean of the weekly maximum temperatures
Blackbody radiation shift in a 43Ca+ ion optical frequency standard
Motivated by the prospect of an optical frequency standard based on 43Ca+, we
calculate the blackbody radiation (BBR) shift of the 4s_1/2-3d_5/2 clock
transition, which is a major component of the uncertainty budget. The
calculations are based on the relativistic all-order single-double method where
all single and double excitations of the Dirac-Fock wave function are included
to all orders of perturbation theory. Additional calculations are conducted for
the dominant contributions in order to evaluate some omitted high-order
corrections and estimate the uncertainties of the final results. The BBR shift
obtained for this transition is 0.38(1) Hz. The tensor polarizability of the
3d_5/2 level is also calculated and its uncertainty is evaluated as well. Our
results are compared with other calculations.Comment: 4 page
Survey of Washington Search and Seizure Law: 1998 Update
This Survey, as did the previous Surveys, summarizes the predominant treatment of search and seizure issues under the Fourth Amendment and under article I, section 7 of the Washington State Constitution to the extent that this state\u27s provision is interpreted differently from the federal provision. The Survey focuses primarily on substantive search and seizure law in the criminal context; it omits discussion of many procedural issues
NASA's UAS NAS Access Project
The vision of the Unmanned Aircraft System (UAS) Integration in the National Airspace System (NAS) Project is "A global transportation system which allows routine access for all classes of UAS." The goal of the UAS Integration in the NAS Project is to "contribute capabilities that reduce technical barriers related to the safety and operational challenges associated with enabling routine UAS access to the NAS." This goal will be accomplished through a two-phased approach based on development of system-level integration of key concepts, technologies and/or procedures, and demonstrations of integrated capabilities in an operationally relevant environment. Phase 1 will take place the first two years of the Project and Phase 2 will take place the following three years. The Phase 1 and 2 technical objectives are: Phase 1: Developing a gap analysis between current state of the art and the Next Generation Air Transportation System (NextGen) UAS Concept of Operations . Validating the key technical areas identified by this Project . Conducting initial modeling, simulation, and flight testing activities . Completing Sub-project Phase 1 deliverables (spectrum requirements, comparative analysis of certification methodologies, etc.) and continue Phase 2 preparation (infrastructure, tools, etc.) Phase 2: Providing regulators with a methodology for developing airworthiness requirements for UAS, and data to support development of certifications standards and regulatory guidance . Providing systems-level, integrated testing of concepts and/or capabilities that address barriers to routine access to the NAS. Through simulation and flight testing, address issues including separation assurance, communications requirements, and human systems integration in operationally relevant environments. The UAS in the NAS Project will demonstrate solutions in specific technology areas, which will address operational/safety issues related to UAS access to the NAS. Since the resource allocation for this Project is limited ($150M over the five years), the focus is on reducing the technical barriers where NASA has unique capabilities. As a result, technical areas, such as Sense and Avoid (SAA) and beyond line of sight command and control will not be addressed. While these are critical barriers to UAS access, currently, there is a great deal of global effort being exercised to address these challenge areas. Instead, specific technology development in areas where there is certainty that NASA can advance the research to high technology readiness levels will be the Project's focus. Specific sub-projects include Separation Assurance, Human Systems Integration, Communications, Certification, and Integrated Test and Evaluation. Each sub-project will transfer technologies to relevant key stakeholders and decision makers through research transition teams, technology forums, or through other analogous means
Survey of Washington Search and Seizure Law: 1998 Update
This Survey, as did the previous Surveys, summarizes the predominant treatment of search and seizure issues under the Fourth Amendment and under article I, section 7 of the Washington State Constitution to the extent that this state\u27s provision is interpreted differently from the federal provision. The Survey focuses primarily on substantive search and seizure law in the criminal context; it omits discussion of many procedural issues
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