Award Data

SUBSTANTIAL PROGRESS HAS BEEN MADE IN RECENT YEARS TO DEVELOP AND VALIDATE MODELS WHICH CAN PREDICT THE PHYSICAL EFFECTS OF NUCLEAR WEAPONS ON STRATEGIC STRUCTURES. SIGNIFICANT UNCERTAINTIES REMAIN, HOWEVER, IN THE CONFIDENCE LEVELS ATTRIBUTABLE TO THESE PREDICTIVE CAPABILITIES. THIS APPROACH WOULD IDENTIFY AND PRIORITIZE THOSE ACTIVITIES, ALONG WITH THEIR ASSOCIATED BUDGETARY AND SCHEDULING CONSI ...

THE SPATIALLY RESOLVED PLASMA DISTRIBUTION BETWEEN THE ELECTRODES OF A PLASMA EROSION OPENING SWITCH (PEOS) DURING THE CLOSED AND OPENING PHASES OF THE SWITCH IS NEEDED TO UNDERSTAND SWITCH OPERATION. CONVENTIONAL HOLOGRAPHIC TECHNIQUES ARE NOT SUFFICIENTLY SENSITIVE TO STUDY THE 10 TO THE 13TH POWER/3CM PLASMA ENCOUNTERED HERE, AND ARRAYS OF LANGMUIR PROBES ARE REQUIRED TO OBTAIN SPATIALLY RESOLV ...

THE DISTRIBUTION OF THE MAGNETIC FIELD IN A HIGH CURRENT PLASMA DEVICE PROVIDES IMPORTANT INFORMATION ABOUT THE DEVICES OPERATION. TRADITIONAL FARADAY ROTATION, ZEEMAN EMISSION SPECTROSCOPY, AND MAGNETIC PROBE TECHNIQUES SUFFER FROM POOR SPATIAL RESOLUTION BECAUSE THE MAGNETIC FIELD EFFECT IS INTEGRATED ALONG THE LINE OF SIGHT FOR THE OPTICAL TECHNIQUE AND THE PROBES PERTURB THE PLASMAS. A LASER I ...

BOTH CURRENT (INF) AND PROPOSED (SALT) ARMS CONTROL TREATIES WILL REQUIRE MEANS OF VERIFICATION AND COUNTING OF MISSILES. CURRENT PROVISIONS PRECLUDE LOOKING INSIDE VEHICLES AND UNDER COVERS. ONE METHOD OF VISUALIZING CONTENTS WILL BE BY X-RAY, HOWEVER, CURRENT X-RAY FILMS ARE LIGHT-SENSITIVE AND REQUIRE CHEMICAL PROCESSING AND BECAUSE OF THIS, MAY NOT BE SUITABLE FOR DIFFICULT ENVIRONMENTS IN THE ...

Using distributed interactive simulation (DIS) to conduct effective training, analyses, or mission support in a tactical nuclear weapons effects (NWE) environment requires realistic computer generated forces (CGF) that are sensitive to such effects. This level of sensitivity requires CGF to apply valid and reliable speed-accuracy measures of environmental effects on human performance within the D ...

THE OBJECTIVES OF THE PROPOSED EFFORT ARE TO DEVELOP A GEOTECHNICAL INVESTIGATION SCHEME AND A DESIGN METHODOLOGY FOR HARDENED UNDERGROUND STRUCTURES. THESE ARE TO BE ACHIEVED BY ENTENDING EXISTING NEW AUSTRIAN TUNNELING METHOD(NATM) TECHNIQUES THROUGH THEORETICAL MODELING COMBINED WITH EXPERIMENTATION TO ENABLE THEM TO BE USED FOR TWO PURPOSES: (1) TO DETERMINE, FROM NATM TECHNQUES THE GROSS PROP ...

DEEP BASING FACILITIES REQUIRE THAT STRUCTURES BE PROTECTED AGAINST BLAST EFFECTS. INHERENT IN THIS NEED IS FOR THE TUNNEL SUPPORT SYSTEM TO BE ECONOMICALLY INSTALLED AND CAPABLE OF WITHSTANDING OVERSTRESSES WHICH MAY REACH OR EXCEED 1 KILOBAR. IN ORDER TO MORE EFFICIENTLY HARDEN A STRUCTURE, THE SUPPORT SYSTEM SHOULD BE MADE MORE DUCTILE SO THAT IT CAN UNDERGO DEFORMATION WHILE RETAINING ITS ABIL ...

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ADVANCED STRUCTURAL MATERIALS USED IN THE FABRICATION OF SUBMARINES CAN SUSTAIN LARGE STRAINS DURING THE FORMATION PROCESS CAUSED BY EXPLOSIVE LOADINGS. THE COMPUTATIONAL SOLID MECHANICS COMMUNITY HAS RECENTRLY RECOGNIZED SERIOUS SHORTCOMINGS IN CALCULATIONS USING MATERIAL MODELS IN THIS LARGE STRAIN REGION. BECAUSE OF THE IMPORTANCE OF CALCULATIONS IN UNDERSTANDING THE SHOCK RESPONSE OF SUBMARINE ...

Weidlinger Associates Inc. proposes to develop effective technology for simulating explosive detonations within civil buildings where the propagation of airblast and failure of weak internal walls are strongly coupled. We will conduct a field test program designed to complement other internal detonation testing efforts such as DTRA''s Distinct Cobra, expanding the available database. We will perfo ...