This paper examines the behavior of hyaluronan solutions at different pH values. A slight degradation is observed in acidic conditions (pH = 1.6) and basic medium (pH = 12.6) from molecular weight distribution analysis, but the rheological behavior is relatively not influenced much by the pH at the exclusion of...
This paper focuses on the on-resistance increase of LDMOS devices due to hot carrier stress and demonstrates that it can be controlled reasonably well by an appropriate placement and coverage of a dummy gate field plate, DGFP. It demonstrates the benefits of the DGFP in reducing the gate to drain...
This paper discusses the hysteresis models for nailed wood shear walls and diaphragms. For comparison, the dynamic response of a 2.44 X 2.44 m wood shear wall is predicted using the Clough, Q-hyst, and modified Stewart hysteresis models. The results indicate that parameters describing strength degradation, stiffness degradation, and pinching...
This white paper reveals about the exploration to the application of stable chlorine isotope ratio measurements as a new tool for evaluating natural attenuation of CAHs. It also reports about the stable isotope ratios of chlorine in both trichloroethene TCE and inorganic chloride in groundwater from an aerobic aquifer beneath...
The complex temperature variations that develop during weld repairs can cause significant degradation of the welded-joint zone, say researchers in a new report from the National Institute of Standards and Technology NIST, Boulder, Colo. The repo The complex temperature variations that develop during...
This paper reviews the use of sunlight to produce OH radicals. The experimental systems necessary for performing pilot-plant scale solar photo-catalytic experiments are described. It outlines the basic components of these pilot plants and the fundamental parameters related to solar phot-ocatalysis reactions. This paper summarizes also most of the research...
This white paper reveals that Proton damage is investigated for several types of modern light-emitting diodes, examining the damage from the standpoint of older models based on lifetime degradation as well as the simpler method of normalized degradation. It also outlines that an empirical model is developed to describe injection-enhanced...
This study investigated an application of TiO2 photo catalyst sensitized with tris (4,4¢-dicarboxy-2,2¢-bipyridyl)ruthenium- II complex to CCl4 degradation under visible light irradiation. By injecting electrons from the photoexcited sensitizer to the conduction band, the sensitized TiO2 degraded CCl4 under the irradiation of Ï > 420 nm. The quantum yield of...
The paper reveals about an autotrophic packed-bed biofilm reactor that was operated in unsaturated-flow mode and continuously fed water containing perchlorate (ClO4) as an electron acceptor and a gas mixture of hydrogen (5%) and carbon dioxide. The reactor was inoculated with a perchlorate-reducing, hydrogen-oxidizing autotrophic bacterial consortium and run for...
Oil lubrication degradation and predicted operating life for anti-friction ball bearings are critical subjects to the plant engineer who has the essential responsibility for maintenance and safe, reliable performance of his rotating machinery. Tribology-the study of wear, friction and lubrication between two moving surfaces-is becoming an essential area of knowledge...
Powder-injection-molded PIM titanium parts with high strength and consistency are said to be under development at the U.S. Dept. of Energy Pacific Northwest National Laboratory, Richland, Wash. This development is to be discussed in a paper that wi Powder-injection-molded PIM titanium parts with high strength and...
A lead-free coating technology that provides protection against ultraviolet degradation and helps automakers reduce costs associated with the coating application process has reportedly been developed by PPG Industries, Pittsburgh, Pa. Called DuraPrim A lead-free coating technology that provides protection against ultraviolet degradation and helps automakers...
In our daily life, we generally expect the transport system to be efficient, safe, and reliable. However, there exist several sources of uncertainties in the transportation system both on demand and supply sides. With a constant growth in economic activities most urban transport networks currently operate at...
Recent empirical studies on the value of time and reliability reveal that travel time variability plays an important role on travelers' route choice decision process. It can be considered as a risk to travelers making a trip. Therefore, travelers are not only interested in saving their travel...
Evaluating the reliability of a transportation network often involves an intensive simulation exercise to randomly generate and evaluate different possible network states. This paper proposes an algorithm to approximate the network reliability which minimizes the use of such simulation procedure. The algorithm will dissect and classify the...
As the problem of full transit vehicles is encountered daily by passengers in most of the big cities, previous research evaluated the consequence of overcrowding in terms of on-board crowding and passengers not being able to board with full vehicles. The impact of overcrowding in the real...
Optimal toll design from a network reliability point of view is addressed in this paper. Improving network reliability is proposed as a policy objective of road pricing. A reliability-based optimal toll design model, where on the upper level network performance including travel time reliability is optimized, while...
I started, as usual, reading the latest edition on the long hike back from the mailbox. Of course, missing the "pink" section in Speak Out was about as likely as sneaking dawn past a rooster! Some of the "best" letters are from those who seem to see sin and degradation...
Diamant Corporation (OTCBB: DIAAF) is pleased toannounce that the Company continues to generate exposure for theirproprietary biodegradable additive, currently available to all plastic bagmanufacturers nationwide, in response to the growing demands of thisswiftly evolving ecologically conscious market. The Los Angeles City Council recently voted to ban plastic shopping bagsfrom stores,...
There has been much buzz about John McCain running an ad suggesting that his opponent Barack Obama is just a "celebrity" in the same vein as Paris Hilton. McCain's strategy may backfire because many Americans -- especially the young -- hold celebrity status as a benchmark of worth, even it...
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