摘要 :
Despite the efforts of both the U.S. Department of Defense (DoD) and the Veterans Health Administration to enhance mental health services, many service members are not regularly seeking needed care when they have mental health sym...
展开
Despite the efforts of both the U.S. Department of Defense (DoD) and the Veterans Health Administration to enhance mental health services, many service members are not regularly seeking needed care when they have mental health symptoms or disorders. The research team hypothesized that mental health stigma may be a barrier to mental health treatment-seeking among military service members. Without appropriate treatment, these mental health symptoms or disorders can have wide-ranging and negative impacts on the quality of life and the social, emotional, and cognitive functioning of affected service members. The RAND National Defense Research Institute (NDRI) was asked to inventory and assess stigma-reduction strategies across both the services and DoD as a whole, to identify strengths and gaps that should be addressed. Informed by this inventory and feedback from an expert panel, NDRI developed a set of recommended priorities for stigma reduction. These recommendations answered such questions as Where are there gaps in stigma-reduction strategies. What stigma-reduction strategies seem particularly promising. Which of the current stigma-reduction strategies should be continued or enhanced. and Where is there duplication or overlap, or alternatively, conflicting messages among current strategies. This report summarizes the findings of this assessment. The contents of this report will be of particular interest to policymakers in DoD, other command and line leadership, and mental health providers and other professionals.
收起
摘要 :
Evaluations are critical for assessing the impact of U.S. Department of Defense (DoD) investments in suicide prevention and can be used as the basis for decisions about whether to sustain or scale up existing efforts. The Defense ...
展开
Evaluations are critical for assessing the impact of U.S. Department of Defense (DoD) investments in suicide prevention and can be used as the basis for decisions about whether to sustain or scale up existing efforts. The Defense Centers of Excellence for Psychological Health and Traumatic Brain Injury asked the RAND Corporation to draw from the scientific literature and create a toolkit to guide future evaluations of DoD-sponsored suicide prevention programs (SPPs). The overall goal of the toolkit is to help those responsible for SPPs determine whether their programs produce beneficial effects and, ultimately, to guide the responsible allocation of scarce resources. This report summarizes the three complementary methods used to develop the RAND Suicide Prevention Program Evaluation Toolkit; it is meant to serve as a companion to the toolkit itself and to provide additional background for those who are interested in learning about the toolkit's development.
收起
摘要 :
The Communications-Electronics Research, Development and Engineering Command (CERDEC) Flight Activity (CFA) at Joint Base McGuire-Dix-Lakehurst (JB MDL) (Figure 1-1) proposes to install a Radio Receiving and Transmission Site (RRA...
展开
The Communications-Electronics Research, Development and Engineering Command (CERDEC) Flight Activity (CFA) at Joint Base McGuire-Dix-Lakehurst (JB MDL) (Figure 1-1) proposes to install a Radio Receiving and Transmission Site (RRATS) on Lakehurst, in Ocean County, NJ. This Environmental Assessment (EA) addresses the potential environmental, socioeconomic, and cultural impacts of this proposal at JB MDL. This EA has been prepared to document the potential for environmental impacts resulting from the Proposed Action. This EA has been prepared under the provisions of, and in accordance with, the National Environmental Policy Act (NEPA) of 1969 (42 United States Code USC 4321 et seq.), Council of Environmental Quality (CEQ) Regulations Implementing the Procedural Provisions of NEPA (40 Code of Federal Regulations CFR 1500-1508), and 32 CFR 989 (Air Force Environmental Impacts Analysis Process). The Proposed Action is needed to generate and receive a variety of signals in order to support multiple Program Executive Office, Intelligence Electronic Warfare & Sensors initiatives. The project would represent an upgrade from legacy test standards and equipment to enhanced testing methods and facilities for current and emerging technologies. It would provide a fixed site for calibration and testing of airborne collection and direction finding systems currently under development by the CFA. No comparable capability exists in the Northeast US. A similar facility exists in the Mid-Atlantic region, although its distant location and frequent scheduling conflicts makes it unsuitable for CFA use. The CFA is currently using antennas mounted on mobile vans to provide some of this capability and a fixed site would significantly improve calibration accuracy.
收起
摘要 :
With prior funding (UX-1225, MM-0437, and MM-0838), we have successfully designed and built a cart-mounted Berkeley UXO Discriminator (BUD) and demonstrated its performance at various test sites. It is a multi-transmitter multi-re...
展开
With prior funding (UX-1225, MM-0437, and MM-0838), we have successfully designed and built a cart-mounted Berkeley UXO Discriminator (BUD) and demonstrated its performance at various test sites. It is a multi-transmitter multi-receiver active electromagnetic system that is able to discriminate UXO from scrap at a single measurement position, hence eliminates a requirement of a very accurate sensor location. The cart-mounted system comprises of three orthogonal transmitters and eight pairs of differenced receivers. Receiver coils are located on symmetry lines through the center of the system and see identical fields during the on-time of the pulse in all of the transmitter coils. They can then be wired in opposition to produce zero output during the ontime of the pulses in three orthogonal transmitters. Moreover, this configuration dramatically reduces noise in the measurements by canceling the background electromagnetic fields (these fields are uniform over the scale of the receiver array and are consequently nulled by the differencing operation), and by canceling the noise contributed by the tilt of the receivers in the Earth's magnetic field, and therefore greatly enhances receivers sensitivity to the gradients of the target.
收起
摘要 :
Atmospheric Transport Modelling (ATM) is a Comprehensive Nuclear- Test-Ban Treaty (CTBT) verification technology that provides the required network processing capability for measurements at radionuclide stations (particulate as we...
展开
Atmospheric Transport Modelling (ATM) is a Comprehensive Nuclear- Test-Ban Treaty (CTBT) verification technology that provides the required network processing capability for measurements at radionuclide stations (particulate as well as noble gas). The associated radionuclide source location analyses are a crucial element of the treaty verification system, since they can be compared and overlaid with localization information obtained from the waveform technologies. Based on the 2003 cooperation agreement between the CTBTO Organization (CTBTO) and the World Meteorological Organization (WMO), a WMO Executive Council decision in 2007 and an exchange of letters between the CTBTO Executive Secretary and the Secretary General of WMO, the CTBTO Provisional Technical Secretariat (PTS) can now request ATM computations from WMO Centres in near-real-time in case of anomalous radionuclide measurements. Currently, nine WMO Centres in Europe (5), North America (1), Asia (2), and Australia (1) are participating. The system serves two purposes, namely (a) to supplement and add confidence to the PTS in-house computations, and (b) to form an ensemble modeling system that accounts for the inherent uncertainty of single models and individual meteorological analyses. The system is scheduled for entry into PTS provisional operations in September 2008. The PTS and WMO have conducted a joint atmospheric backtracking exercise in December 2007. The exercise was triggered by a seismic event from the Standard Event List (SEL3) selected according to predefined criteria, and a forward simulation of the possible release of radionuclides at this event location was performed by the event selection team to obtain a subsequent measurement scenario at IMS radionuclide sites. The evolving measurement scenario was then communicated to the PTS Monitoring and Data Analysis Section, exactly according to the timelines laid down in the Operational Manual.
收起
摘要 :
The FY06 Defense Appropriation contains funding for the 'Development of Advanced, Sophisticated, Discrimination Technologies for UXO Cleanup' in the Environmental Security Technology Certification Program. In 2003, the Defense Sci...
展开
The FY06 Defense Appropriation contains funding for the 'Development of Advanced, Sophisticated, Discrimination Technologies for UXO Cleanup' in the Environmental Security Technology Certification Program. In 2003, the Defense Science Board observed: 'The problem is that instruments that can detect the buried UXOs also detect numerous scrap metal objects and other artifacts, which leads to an enormous amount of expensive digging. Typically 100 holes may be dug before a real UXO is unearthed. The Task Force assessment is that much of this wasteful digging can be eliminated by the use of more advanced technology instruments that exploit modern digital processing and advanced multi-mode sensors to achieve an improved level of discrimination of scrap from UXOs.' Significant progress has been made in discrimination technology. To date, testing of these approaches has been primarily limited to test sites with only limited application at live sites. Acceptance of discrimination technologies requires demonstration of system capabilities at real UXO sites under real world conditions.
收起
摘要 :
A prototype active electromagnetic system has been developed for detecting and characterizing UXO. The system employs three orthogonal loop transmitters and eight vertical field detectors deployed in the plane of the horizontal lo...
展开
A prototype active electromagnetic system has been developed for detecting and characterizing UXO. The system employs three orthogonal loop transmitters and eight vertical field detectors deployed in the plane of the horizontal loop transmitter. The location and orientation of the three principal polarizabilities of a target can be recovered from a single position of the transmitter-receiver system. Further characterization of the target is obtained from the broadband response. The system employs a bipolar half sine pulse train current waveform and the detectors are dB/dt induction coils designed to minimize the transient response of the primary field pulse. The target transient is recovered in a 40(dot)s to 1.0 ms window. The ground response imposes an early time limit on the time window and system/ambient noise limits the late time response. Nevertheless for practical transmitter moments and optimum receivers the size the size and the ratio of conductivity to permeability can be accurately recovered. The prototype system has successfully recovered the depths and polarizabilities of ellipsoidal test targets.
收起
摘要 :
The continuum generation by intense femtosecond IR laser pulses focused in air including the effect of third-harmonic generation is investigated. We have used a theoretical model that includes the full spatio- temporal dynamics of...
展开
The continuum generation by intense femtosecond IR laser pulses focused in air including the effect of third-harmonic generation is investigated. We have used a theoretical model that includes the full spatio- temporal dynamics of both the fundamental and the third-harmonic pulses. Results of our numerical calculations show that a two-color filamentation effect occurs, in which the third-harmonic conversion efficiency remains almost constant over the whole filament length. It is found that this effect is rather independent of the wavelength of the input beam and the focal geometry. During the filamentation process the third-harmonic pulse itself generates a broad continuum, which can even overlap with the continuum of the fundamental pulse for the longer pump wavelengths. In consequence the continuum generation generated by intense IR laser pulses is further extended into the UV.
收起
摘要 :
A Spectrometric Oil Analysis Program (SOAP) operates on selected Australian Defence Force platforms to assist in the prediction of incipient machinery failure. Historically, the data from the Australian Army CH-47D helicopters has...
展开
A Spectrometric Oil Analysis Program (SOAP) operates on selected Australian Defence Force platforms to assist in the prediction of incipient machinery failure. Historically, the data from the Australian Army CH-47D helicopters has been stored on a simple Microsoft Excel spreadsheet. DSTO was tasked by the Army Aircraft Logistic Management Squadron to assess the usefulness of this database. This report contains a detailed description of the replacement SOAP database designed by DSTO.
收起
摘要 :
Ferrofluids are stable colloidal suspensions of magnetic particles that can be stabilized in various carrier liquids. In this study the authors investigate the potential of ferrofluids to trace the movement and position of liquids...
展开
Ferrofluids are stable colloidal suspensions of magnetic particles that can be stabilized in various carrier liquids. In this study the authors investigate the potential of ferrofluids to trace the movement and position of liquids injected in the subsurface using geophysical methods. An ability to track and monitor the movement and position of injected liquids is essential in assessing the effectiveness of the delivery system and the success of the process. Ferrofluids can also provide a significant detection and verification tool in containment technologies, where they can be injected with the barrier liquids to provide a strong signature allowing determination of the barrier geometry, extent, continuity and integrity. Finally, ferrofluids may have unique properties as tracers for detecting preferential flow features (such as fractures) in the subsurface, and thus allow the design of more effective remediation systems. In this report the authors review the results of the investigation of the potential of ferrofluids to trace the movement and position of liquids injected in the subsurface using geophysical methods. They demonstrate the feasibility of using conventional magnetometry for detecting subsurface zones of injected ferrofluids used to trace liquids injected for remediation or barrier formation. The geometrical shapes considered were a sphere, a thin disk, a rectangular horizontal slab, and a cylinder. Simple calculations based on the principles of magnetometry are made to determine the detection depths of FTs. Experiments involving spherical, cylindrical and horizontal slabs show a very good agreement between predictions and measurements.
收起
