... the many factors in the weather which contribute ... specimens cut from the weathered sheets of ... during exposure to accelerated weathering cycles in ...
DTIC Science & Technology
... Title : The Effect of Accelerated Ultra Violet Weathering on the Rain Erosion Resistance of Coated Aircraft Transparencies,. ...
... ADD338241. Title : Evaluation of an Accelerated Weathering of Organic Coatings by Means of Lifetime Analysis,. Corporate Author : ...
... Accession Number : ADD441802. Title : Accelerated Weathering Light Sources Compared to Sunlight Spectra,. Corporate Author : ...
... Title : A Comparison of Accelerated and Natural SAE Weathering Tests for Exterior Trim Materials Durability, Using a Range of Automotive Coatings ...
... 3. The Evaluation of a Solar Radiation Concentration Device (EMMA) as a Means of Accelerating the Weathering of Plastics. ...
... PLASTICS, *WEATHERING, MECHANICAL PROPERTIES, LABORATORY TESTS, DEGRADATION, CHEMICAL PROPERTIES, PHYSICAL ...
An investigation was made to determine the effect of moisture on rate of strength deterioration from accelerated weathering and the effect that synthetic fiber cloth variables have on this deterioration. Data from XW accelerated weathering exposures of 50...
National Technical Information Service (NTIS)
... 6. The Further Evaluation of a Solar Radiation Concentrating Device (EMMA) as a Means of Accelerating the Weathering of Plastics. ...
... subs-equent weathe-ring expectant reaction to outdoor exposiure performrance in the natural environment. Theme conclusions ...
Jun 16, 2011 � When exposed to accelerated weathering, however, wood-plastic composites may experience a color change and/or loss in mechanical properties. ...
Treesearch
Sep 1, 2011 ... Description: Fire-retardant-treated products for exterior applications must be subjected to actual or accelerated weathering prior to fire testing. ...
Page 1. AD-A271 332 A~my RESEARCH LABORATORY Accelerated Weathering: Development of Fail/Pass Requirements ...
... Accession Number : ADA271332. Title : Accelerated Weathering: Development of Fail/Pass Requirements for Low VOC Alkyd Enamels. ...
Nov 8, 2007 ... Engineered Weathering Process Could Mitigate Global Warming ... the researchers say they can accelerate natural chemical weathering, ...
NASA Website
... a dry-dry process and a wet-dry process ... premium products which have not weathered significantly in ... located in different climates weather differently ...
... is required. Dry, windy weather accelerates shattering of plant embryos for all plants (except for zoochores). For example ...
... Title : A STUDY OF SYNTHETIC FIBER CLOTH VARIABLES, ACCELERATED WEATHERING VARIABLES AND THEIR INTERACTION. ...
...weatherization, and prior liens. (f) Acceleration. The lender, or the Agency if it...indebtedness as expeditiously as possible when acceleration is necessary including giving any notices...legal actions required. A copy of the acceleration notice or other acceleration...
Code of Federal Regulations, 2011
...weatherization, and prior liens. (f) Acceleration. The lender, or the Agency if...indebtedness as expeditiously as possible when acceleration is necessary including giving any notices...legal actions required. A copy of the acceleration notice or other acceleration...
Code of Federal Regulations, 2010
Jun 16, 2011 ... Title: Evaluating weather factors and material response during outdoor exposure to determine accelerated test protocols for predicting ...
An investigation was made of the effect of comparatively long exposure of neoprene jackets in an accelerated weathering device. At the same time, it was hoped that the effect on weathering of lowering the neoprene content of a jacket could be determined. ...
Jun 16, 2011 ... The sol-gel process allowed the deposition of a covalently bound ... Keywords: Wood surfaces, weathering, alkoxysilanes, sol-gel deposition ...
Jun 16, 2011 � Keywords: Weathering, polyethylene, fiber reinforced plastics, composite materials, wood products, durability ...
This paper describes the needs, reasoning, approaches, and technical details to establish a practical accelerated weathering test (AWT) protocol for indoor testing of the photothermal stability of encapsulation materials and encapsulated solar cells and minimodules.
Energy Citations Database
... 50%wood-flour-filled high-density polyethylene (HDPE) composite samples were injection molded or extruded. Composites were exposed to two accelerated weathering cycles in ... ...
NBII National Biological Information Infrastructure
... and interpreted give highly satisfactory ... EXPECTANCY(SERVICE LIFE), POLYMERS ... RADIATION, PLASTICS, ACCELERATED TESTING, HUMIDITY ...
... Descriptors : *SYMPOSIA, *AIRCRAFT LANDINGS, ALL WEATHER AVIATION, AUTOMATIC, AIRSPEED, ACCELERATION, ANGLE OF ATTACK ...
Light, heat, electricity, and magnetism. Earth and Space Science .... However, radio waves coming from space are caused by electrons being accelerated by ...
Subsequent weathering of the rocks released hydrogen peroxide into the ... seek a physically plausible pathway to the accelerated oxidation of Titan and the ...
properties of selected reinforced plastics were investigated. The .... rankings of the plastics for the accelerated weathering tests with the ...
... The effects of outdoor weather exposure, indoor accelerated aging at high temperature and chemical attack on phenolic, melamine, silicone, epoxy ...
... world concerns that directly feed from Arctic weather that are ... As the ice caps begin to thin and recede there is ... This is being accelerated as the caps ...
... 31 Aug 76-Aug 77. Corporate Author : INSTITUTO SUPERIOR TECHNICO LISBON (PORTUGAL) LAB OF MINERALOGY AND PETROLOGY. ...
... When exposed to accelerated weathering, however, wood�plastic composites may experience a color change and loss in mechanical properties. Differences in weathering cycle and composite surface characteristi...
This report is an account of a second trial conducted at Desert Sunshine Exposure Test Inc. using the facility of the EMMA and EMMAQUA machines which are reported to accelerate natural weathering. Low density polyethylene and polyacetal specimens were tested and no real acceleration factors could be found for the EMMA machines over ...
The factors which influence the weathering in the UK of green poly(vinyl chloride) - PVC - used as insulation for overhead power lines have been investigated. Degradation processes such as surface cracking, bulk cracking and color change are explaind with reference to PVC composition. It is shown that artificial, accelerated weathering ...
Presented at the 2001 NCPV Program Review Meeting: We report the observed degradation in 6 different types of PV modules as a function of total UV exposure and give a number of recommendations for future weathering tests. Since 1997, using existing ASTM standards for weathering of materials, we have been conducting a solar weathering ...
DOE Information Bridge
This report gives details of a trial in Phoenix comparing the rate of natural weathering with that for exposure on EMMA - a device which increases the intensity of solar radiation. The materials exposed were low density polyethylene and polyacetal. An acceleration factor of about two was found for both materials.
forecasts. Advanced Weather Interactive Processing System WIPS) +$5.3M: This requested increase will provide installed for over 20 years without any get Request ($ in Millions) Weather (National Weather Service) The National Weather Service (NWS) requests $963.9M in FY 2010, reflecting a net increase of $5.0M over ...
E-print Network
influence the atmospheric radiative balance, thereby affecting weather and climate (e.g., Kaufman et al, impacting vis- ibility, health, and local weather. Meanwhile, Saharan aerosols are under investigation Africa Initiative (www.africa.ucar.edu/index. html) on tropical health�climate�weather linkages. The WCRP
The solar energetic particles (SEPs) of consequence to space weather are accelerated at shock waves driven out from the Sun by fast coronal mass ejections (CMEs). In the large events, these great shocks fill half of the heliosphere. SEP intensity profiles...
The degree of correlation obtained between results of natural and artificial weathering for a wide range of polymers is discussed. It is noted that the greatest successes in achieving satisfactory correlation continue to be reported for olefin polymers. H...
Weathering and deterioration of sculptured stone and masonry is a natural process which stars at the same moment the stone is quarried and exposed to exogenous conditions. This process of natural decay has, however, been accelerated due to the emission of...
A detailed study has been conducted to assess the effect of various artificial weathering cycles on the degradation of three formulations of window-grade UPVC. The results were compared with samples which had been exposed outdoors in the north-east of Eng...
The project concerns correlation between weathering indices obtained from samples of one type of sedimentary rock (graywacke) and those obtained after laboratory agency tests of the same rocks. Study is made of the process of natural alteration in three s...
An ultraviolet (UV) weathering device based on integrating sphere technology has been designed, fabricated, and implemented for studying the accelerated weathering of polymers. This device has the capability of irradiating multiple test specimens with uniform, high intensity UV radiation while simultaneously subjecting them to a wide ...
and space station definiton studies. Prior to coming to TBE, he was ...... weather in the Shuttle landing area. The notes in Figure 9 are shown to explain ...
to detect wild fires and changes in land cover, track rainfall and weather patterns, and monitor coastal ..... Neotropical Deciduous Forest, West Mexico: ...
Exposure Testing Market Expands with Ultra-Accelerated Weathering System In this video, NREL researchers Gary Jorgenson and Carl Bingham discuss the NREL-developed ultra...
National Renewable Energy Laboratory (NREL)
Acid rain in the past century has accelerated the process of weathering. ... The northern side was bombarded and carved by debris from the Wisconsin Ice ...
continually in the literature on artificial weathering, the results of such ... We also investigated hyperaccelerated photochemical exposure with ...... That is , the rate of chromophore formation increases with exposure ...
Title: Effect of Simulated Service Conditions on Plastics During Accelerated and 2-Year Weathering Tests. Online Source: Click to View PDF File [PDF Size: ...
... polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP), polystyrene (PS), and high-impact polystyrene (HIPS), were used to evaluate the effect of ... ...
... weather at Curtis Bay, Maryland; (2) kapok filled pads retained their buoyant properties considerably better than cattail or milkweed filled pads. ...
Three proprietary coatings on monolithic polycarbonate transparency material were examined. The coated polycarbonate materials were exposed to one and three years of accelerated ultra violet exposure. The specimens were then exposed at a 30 degrees impact...
This report describes the results of accelerated aging experiments (weathering) conducted on prototype tamper tapes bonded to a variety of surface materials. The prototype tamper tapes were based on the patented Confirm(reg sign) tamper-indicating technol...
Various plastics were tested by exposing them to direct sunlight (about 8 suns) and also to accelerated weathering. The plastics tested included acrylics, weatherable vinyl (PVC), polyethylene (PE), polypropylene (PP), Tedlar coated fiberglass, and Tedlar coated vinyl. Comparable exposures gave consistent degradations. Heat seals ...
NASA Astrophysics Data System (ADS)
Status results are presented for the Outdoor Accelerated-Weathering Tracking System (OATS) first study on photovoltaic (PV) modules. Studies began in November 1997 on pairs of commercially available crystalline silicon and amorphous silicon (a-Si) PV modules kept at constant resistive load.
This paper describes the Outdoor Accelerated-weathering Tracking System (OATS) and interim results for the first OATS study on photovoltaic (PV) modules. With two test planes measuring 1.52 x 1.83 m, OATS provides a unique solar-concentrating exposure cap...
GPU acceleration of the dynamics routine in the HIRLAM weather forecast model Van Thieu Vu1 Gerard GPU card using the Compute Unified Device Archi- tecture (CUDA) as parallel programming model. We optimization. On a single GPU, we observe speed- ups by an order of magnitude over our hosting CPU (Intel quad
A standard accelerated weathering test using Dimethyl Sulfoxide (DMSO) was developed to simulate the chemical degradation of basaltic rocks. The recommended procedure consists of immersing a sample of aggregate in the size range between 2.38 mm and 4.76 m...
...APPROVAL LIFESAVING EQUIPMENT Distress Signals for Boats, Orange Flag § 160.072-5 Accelerated weathering test. ...tearing, (3) The flag does not retain its bright red/orange color, (4) The disc and square images no longer meet...
: SIMULATING GROUNDWATER SEEPAGE ON MARS 6 of 14 XXXXXX #12;516 slow rock weathering rate (0.0001 m in a 7 computer model as seepage erosion by contributing to surface runoff and as seepage 8 weathering by causing accelerated weathering of bedrock, which makes its subsequent 9 erosion and removal easier
It is extremely difficult to match light oils to their sources after environmental weathering. A new accelerated laboratory weathering procedure, combined with either log-ratio or vector pattern recognition, gives markedly improved identification of spilled light fuel oils by infrared spectroscopy. The technique can be used with small ...
Glass has been the traditional glazing material for solar energy collectors; however, thin plastics are much cheaper and easier to install. Most clear plastics deteriorate in the weather and are particularly vulnerable to ultra-violet light (and to elevated temperatures). Therefore various kinds of plastics were tested by exposing them to direct sun-light and also to ...
A critical uncertainty in models of the global carbon cycle and climate is the combined effect of organic activity, temperature, and atmospheric CO[sub 2] on silicate weathering. Here the authors present new dissolution rates of anorthite and augite which indicate that silicate weathering in organic-rich solutions is not directly affected by soil CO[sub 2] ...
