14,752 research outputs found
A Method for Establishing Outdoor Recreation Project Priorities in Alaska
The authors thank Theodore Smith, Edward Kramer and Nat Goodhue
of the Division of Parks for information and comments supplied during this
study, and Frank Orth, Charles Marsh, Ed Kramer, C.E. Logsdon, and Frank
Wooding for reviewing the manuscript.
Thanks is also due the Department of Business Administration,
University of Alaska, Fairbanks, Dale Swanson, Head, for their cooperation
in this research project.The objectives of this study are to define outdoor recreation benefits to
the public and to develop a priority ranking method for proposed outdoor
recreation projects. A careful analysis of the benefits which people derive
from outdoor recreation provides a frame of reference for evaluating a
recreational facility. A project should supply those benefits which are most
highly demanded by the public. Fifteen benefits of recreation are defined
and discussed. They are divided into two major categories; those which
accrue to recreational participants and those which accrue to
non-participants.This research was supported by a grant from the Division of Parks,
State of Alaska
CI emission in Ultra Luminous Infrared Galaxies as a molecular gas mass tracer
We present new sensitive wide-band measurements of the fine structure line
3^P_1 -> 3^P_0 (J=1-0, 492GHz) of neutral atomic carbon (CI) in the two typical
Ultra Luminous Infrared Galaxies NGC6240 and Arp220. We then use them along
with several other CI measurements in similar objects found in the literature
to estimate their global molecular gas content under the assumption of a full
CI-H_2 concomitance. We find excellent agreement between the H_2 gas mass
estimated with this method and the standard methods using 12^CO. This may
provide a new way to measure H_2 gas mass in galaxies, and one which may be
very valuable in ULIRGs since in such systems the bright 12^CO emission is
known to systematically overestimate the gas mass while their 13^CO emission is
usually very weak. At redshifts z>=1 the CI J=1-0 line shifts to much more
favorable atmospheric windows and can become a viable alternative tracer of the
H_2 gas fueling starburst events in the distant Universe.Comment: 11 pages, 2 figures. Accepted for publication in ApJ Letter
Enduring Entrepreneurship in the Context of Public-Private Partnerships
As institutional innovations designed to effect societal change, this work considers public-private partnerships (PPPs) as exemplars of enduring entrepreneurship. By surviving beyond the initial objectives of the partnership, many PPPs exhibit continual renewal and repeated acts of entrepreneurship as they explore novel solutions to intractable social problems. With recognition of goal interdependence between partner firms and a structure of open governance, PPPs create unique opportunities for innovative ideas and knowledge exploration and exploitation. This manuscript explores the formative conditions of PPPs and suggests two important outcomes - enhanced absorptive capacity and knowledge spillovers – that contribute to enduring entrepreneurship and long-lasting partnerships
Shear buckling of square perforated plates
The behavior of thin square perforated plates under the action of uniform shear deformation is studied experimentally and analytically using finite element analysis. Elastic Shear buckling strength is established as a function of the diameter of a round, centrally located hole in the plate. Post buckling behavior and the behavior of perforated plates with various ring stiffeners are also studied experimentally
Single-photon device requirements for operating linear optics quantum computing outside the post-selection basis
Photonics is a promising architecture for the realisation of quantum
information processing, since the two-photon interaction, or non-linearity,
necessary to build logical gates can efficiently be realised by the use of
interference with ancillary photons and detection. Although single-photon
sources and detectors are pivotal in realisations of such systems, clear
guidelines for the required performance of realistic systems are yet to be
defined. We present our detailed numerical simulation of several quantum optics
circuits including sources and detectors all represented in multi-dimensional
Fockspaces, which allows to obtain experimentally realistic performance bounds
for for these devices. In addition, the single-photon source based on switched
parametric down-conversion is studied, which in principle could reach the
required performance. Three approaches for implementing the switching hierarchy
of the photons are simulated, and their anticipated performance is obtained.
Our results define the bar for the optical devices needed to achieve the first
level of linear-optics quantum computing outside the coincidence basis.Comment: To appear in J. Mod. Optic
Direct oral anticoagulants‐Remove versus Taipan snake venom time for detection of a lupus anticoagulant in patients taking oral direct factor Xa inhibitors
Background: The optimal method of detecting a lupus anticoagulant (LA) for patients taking direct factor Xa inhibitor (DFXaI) direct oral anticoagulants (DOACs) remains controversial. Methods include charcoal adsorption of the DOACs to allow testing with the activated partial thromboplastin time (APTT) and dilute Russell viper venom time (dRVVT), or use of the DFXaI‐insensitive Taipan snake venom time (TSVT) and Ecarin time (ET) assays on neat plasma. Objectives: The objective was to compare the utility of APTT and dRVVT analysis following DOAC Remove against TSVT/ET on untreated plasma for LA detection in spiked plasmas and routine clinical samples for patients on DFXaIs. Patients/methods: Various LA‐negative and LA‐positive samples were assayed by APTT, dRVVT, and TSVT/ET, and then separately spiked with rivaroxaban, apixaban, and edoxaban calibrators to a concentration of ~190 ng/ml and the assays repeated on spiked plasma before and after DOAC Remove treatment. Testing of 284 consecutive samples from DFXaI‐anticoagulated patients by APTT/dRVVT and TSVT/ET before and after DOAC Remove treatment was undertaken. Results: In the spiking model, we found that both TSVT/ET and DOAC Remove strategies generally distinguished LA‐negative and LA‐positive samples, but some false‐positive LA results occurred. In the investigation of 284 consecutive patient samples on DFXaIs, the percentage agreement for LA detection in neat samples tested by TSVT/ET versus APTT and dRVVT after DOAC Remove treatment was 90% (Cohen kappa 0.12). Conclusion: Our data highlight uncertainty and disagreement for testing LA in patients on DFXaI. Further studies are required
First Freedom: The Baptist Perspective on Religious Liberty
First Freedom is an important gathering of messages from a recent conference on religious liberty held at Southwestern Baptist Theological Seminary. Editor Jason B. Duesing explains:
The purpose of this collection is, first, to provide an introductory look into the biblical and historical foundations of religious liberty combined with several instances of contemporary expression and defense for the purpose of instruction, edification, and encouragement to all who take the time to read this volume. Second, however, we wish to remind Baptists in the twenty-first century of the price that was paid by their forefathers for the establishment and defense of religious liberty. To be sure, there were people of various religious and denominational preferences that providence used to implement the religious freedoms now enjoyed by all, but for Baptists to overlook the contribution of their own would be a travesty.https://digitalcommons.cedarville.edu/faculty_books/1147/thumbnail.jp
Feedback Corrections for Ground Motion Effects at ATF2
accelconf.web.cern.ch/accelconf/e08/papers/tupc122.pdfInternational audienceGoals of ATF2 will be to provide beams with a few tens of nanometers and stability at the nanometer level. To achieve this, several corrections have to be applied as tra- jectory corrections and optics correction. Once the most critical effects are found, they must be canceled by trajec- tory correction and rematching of the optics quickly and efficiently. A method using SVD-determined knobs and how it can be implemented in ATF2 are here described
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