Electronic ripple indicator

Electronic circuit for monitoring excessive ripple voltage on dc power lines senses voltage variations from few millivolts to maximum of 10 volts rms. Instrument is used wherever power supply fluctuations might endanger system operations or damage equipment. Device is inexpensive and easily packaged in small chassis

Centrifuge mounted motion simulator Patent

Centrifuge mounted motion simulator with elevator mechanis

The selection, appraisal and retention of digital scientific data: dighlights of an ERPANET/CODATA workshop

CODATA and ERPANET collaborated to convene an international archiving workshop on the selection, appraisal, and retention of digital scientific data, which was held on 15-17 December 2003 at the Biblioteca Nacional in Lisbon, Portugal. The workshop brought together more than 65 researchers, data and information managers, archivists, and librarians from 13 countries to discuss the issues involved in making critical decisions regarding the long-term preservation of the scientific record. One of the major aims for this workshop was to provide an international forum to exchange information about data archiving policies and practices across different scientific, institutional, and national contexts. Highlights from the workshop discussions are presented

Effect of cryogenic irradiation on NERVA structural alloys

Several alloys (Hastelloy X, AISI 347, A-286 bolts, Inconel 718, Al 7039-T63 and Ti-5Al-2.5Sn ELI) were irradiated in liquid nitrogen (140 R) to neutron fluences between 10 to the 17th power and 10 to the 19th power nvt (E greater than 1.0 Mev). After irradiation, tensile properties were obtained in liquid nitrogen without permitting any warmup except for some specimens which were annealed at 540 R. The usual trend of radiation damage typical for materials irradiated at and above room temperature was observed, such as an increase in strength and decrease in ductility. However, the damage at 140 R was greater because this temperature prevented the annealing of radiation-induced defects which occurs above 140 R

Time for "justice" : Research to inform the development of a human rights framework for the design and implementation of an "acknowledgement and accountability forum" on historic abuse of children in Scotland

In 2002, Chris Daly raised a petition to the Scottish Executive (PE535) calling for an independent inquiry into the historic abuse of children in Scotland. This led to the setting up of a reference group in 2003, in order to explore the role of a truth and reconciliation process that was identified as an important step in dealing with historic abuse. In 2004, there was an apology for such abuse by the then First Minister, Jack McConnell. In 2005, Tom Shaw led the Historic Abuse Systemic Review. This covered the period 1950 – 1995 and was completed in 2007. In 2006, a sub-group of the reference group that was set up in 2003 identified the need for a service for survivors. This led to the funding of ‘In Care Survivor Scotland’ in 2008, under the umbrella of ‘Open Secret’. It is important to see this current report in this context. Eight years on from the initial petition, it is clear that this process has been seen by many as a long road to acknowledging the need to address outstanding human rights issues in relation to the historic abuse of children in care in Scotland

Independent Orbiter Assessment (IOA): Analysis of the hydraulics/water spray boiler subsystem

The results of the Independent Orbiter Assessment (IOA) of the Failure Modes and Effects Analysis (FMEA) and Critical Items List (CIL) are presented. The IOA approach features a top-down analysis of the hardware to determine failure modes, criticality, and potential critical items (PCIs). To preserve independence, this analysis was accomplished without reliance upon the results contained within the NASA FMEA/CIL documentation. This report documents the independent analysis results for the Orbiter Hydraulics/Water Spray Boiler Subsystem. The hydraulic system provides hydraulic power to gimbal the main engines, actuate the main engine propellant control valves, move the aerodynamic flight control surfaces, lower the landing gear, apply wheel brakes, steer the nosewheel, and dampen the external tank (ET) separation. Each hydraulic system has an associated water spray boiler which is used to cool the hydraulic fluid and APU lubricating oil. The IOA analysis process utilized available HYD/WSB hardware drawings, schematics and documents for defining hardware assemblies, components, and hardware items. Each level of hardware was evaluated and analyzed for possible failure modes and effects. Criticality was assigned based upon the severity of the effect for each failure mode. Of the 430 failure modes analyzed, 166 were determined to be PCIs

On rigidly rotating perfect fluid cylinders

The gravitational field of a rigidly rotating perfect fluid cylinder with gamma- law equation of state is found analytically. The solution has two parameters and is physically realistic for gamma in the interval (1.41,2]. Closed timelike curves always appear at large distances.Comment: 10 pages, Revtex (galley

Independent Orbiter Assessment (IOA): Assessment of the hydraulics/water spray boiler subsystem

The results of the Independent Orbiter Assessment (IOA) of the Failure Modes and Effects Analysis (FMEA) and Critical Items List (CIL) are presented. The IOA effort first completed an analysis of the Hydraulics/Water Spray Boiler (HYD/WSB) hardware, generating draft failure modes and potential critical items. To preserve independence, this analysis was accomplished without reliance upon the results contained within the NASA FMEA/CIL documentation. The IOA results were then compared to the NASA FMEA/CIL baseline with proposed Post 51-L updates included. A resolution of each discrepancy from the comparison is provided through additional analysis as required. This report documents the results of that comparison for the Orbiter HYD/WSB hardware. The IOA product for the HYD/WSB analysis consisted of 447 failure mode worksheets that resulted in 183 potential critical items being identified. Comparison was made to the NASA baseline which consisted of 364 FMEAs and 111 CIL items. This comparison produced agreement on all but 68 FMEAs which caused differences in 23 CIL items

Between Realism and Re-enactment: Navigating Dramatic and Musical 'Problems' in Voyage to the Moon

How do practitioners understand the relationship between performance, history and emotion in Western art music? Based on an ethnographic study of a contemporary pasticcio opera, we take the rehearsal room as an important, yet often overlooked, site in which creative artists imagine and perform different relationships with their musical and cultural heritage. Focussing on the interplay between two performative modes, which we call realism and re-enactment, we describe how the creative team navigated various dramatic and musical challenges associated with the opera, generating a final production that was ambiguous and multi-layered in its emotional registers and attitudes towards the past