NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
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architectural level. Separating the communication service, which is purely the IP packet from application services, which<br />
include A/G <strong>and</strong> G/G voice services, is one issue that shall be displayed. The second topic discusses various service discover<br />
frameworks <strong>and</strong> evaluates their usability in SIP-based environments. The Service Location Protocol (SLP) has been chosen<br />
as best-fitting protocol due to its lightweight character, platform <strong>and</strong> programming language independence <strong>and</strong> its<br />
non-proprietary <strong>and</strong> open st<strong>and</strong>ard.<br />
Derived from text<br />
Position (Location); Programming Languages; Protocol (Computers)<br />
20060002344 ISRO Satellite Centre, Peenya, Bangalore, India<br />
Simulation of Piezoelectric Effect in Nastran: Experimental <strong>and</strong> Analytical Estimation of Dynamic Response of a<br />
Circular Plate<br />
Kamat, S. M.; Badari Narayana, K.; Kanade, Vivekan<strong>and</strong> S.; Journal of Spacecraft Technology, Volume 15, No. 2; July 2005,<br />
pp. 31-39; In English; See also 20060002338; Copyright; Avail.: Other Sources<br />
Smart materials <strong>and</strong> structures are extensively used in a various engineering fields including aerospace, heavy<br />
engineering, civil engineering <strong>and</strong> domestic appliances, Of the various smart materials piezo electric are widely used for both<br />
sensing <strong>and</strong> actuation applications. Currently, only a few general-purpose softwares are available with built-in smart element<br />
(piezo) capability. It is possible to use of the software as well, by using initial strain concepts. This paper brings out the<br />
simulation of the piezoelectric effect i 1D <strong>and</strong> 2D NASTRAN elements. The concept of the thermal strain (or equivalent force)<br />
is used to simulate the strain generated by the piezo element in NASTRAN elements. Using this principle, the dynamic<br />
response of a circular plate excited by a piezo crystal is obtained <strong>and</strong> the present solutions are compared with experimental<br />
results.<br />
Author<br />
Nastran; Piezoelectricity; Circular Plates<br />
20060002407 Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek, The Hague, Netherl<strong>and</strong>s<br />
Vision for a future diagnostic architecture<br />
Keijer, W.; Gillis, M. P. W.; Loo, S. v.d.; July 2005; 31 pp.; In Dutch; Original contains color illustrations<br />
Contract(s)/Grant(s): TNO Proj. 33455<br />
Report No.(s): TD2005-0302; TNO-DV1 2005 A022; Copyright; Avail.: Other Sources<br />
Due to the increasing complexity <strong>and</strong> integration of modem ship systems, diagnosis of system failures becomes<br />
increasingly difficult. To this end, tools must be developed to assist the maintainers of the systems in diagnosis <strong>and</strong> repair tasks.<br />
This report outlines an architecture for the development of such tools. Furthermore, the impact this architecture has on the<br />
knowledge management organization has been assessed.<br />
Author<br />
Architecture (Computers); Support Systems; System Failures<br />
20060002450 Defense Advanced Research Projects Agency, Arlington, VA USA<br />
Automatic Parallelization: An Incremental, Optimistic, Practical Approach<br />
Schwartz, Naftali; Sep. 1, 1999; 102 pp.; In English; Original contains color illustrations<br />
Report No.(s): AD-A440521; No Copyright; Avail.: Defense <strong>Technical</strong> Information Center (DTIC)<br />
The historic focus of Automatic Parallelization efforts has been limited in two ways. First, parallelization has generally<br />
been attempted only on codes which can be proven to be parallelizeable. Unfortunately, the requisite dependence analysis is<br />
undecidable, <strong>and</strong> today’s applications demonstrate that this restriction is more than just theoretical. Second, parallel program<br />
generation has generally been geared to custom multi-processing hardware. Although a network of workstations (NOW) could<br />
in principle be harnessed to serve as a multiprocessing platform, the NOW has characteristics which are at odds with elective<br />
utilization. This thesis shows that by restricting our attention to the important domain of ‘embarrassingly parallel’ applications,<br />
leveraging existing scalable <strong>and</strong> efficient network services, <strong>and</strong> carefully orchestrating a synergy between compile-time<br />
transformations <strong>and</strong> a small runtime system, we can achieve a parallelization that not only works in the face of inconclusive<br />
program analysis, but is also efficient for the NOW. We optimistically parallelize loops whose memory access behavior is<br />
unknown, relying on the runtime system to provide efficient detection <strong>and</strong> recovery in the case of an overly optimistic<br />
transformation. Unlike previous work in speculative parallelization, we provide a methodology which is not tied to the Fortran<br />
language, making it feasible as a generally useful approach. Our runtime system implements Two-Phase Idempotent Eager<br />
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