ReVuln, a commercial vulnerability research firm, published a paper in October 2012 that said the Steam browser protocol was posing a security risk by enabling malicious exploits through a simple user click on a maliciously crafted steam:// URL in a browser.[135][136][137] This was the second serious vulnerability of gaming-related software following a problem with Ubisoft's Uplay.[138] German IT platform Heise online recommended strict separation of gaming and sensitive data, for example using a PC dedicated to gaming, gaming from a second Windows installation, or using a computer account with limited rights dedicated to gaming.[137]

Union Pacific's famed Big Boy No. 4014, the world's largest operating steam locomotive, will return to the rails this summer with a scenic tour across mountain ranges and high desert vistas in four western states: Wyoming, Utah, Nevada and California.


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To be notified when more details about the steam schedule are available, join the Official Union Pacific Steam Club at ! Steam club members always get notified first when news about Union Pacific's steam program is released!

The Steam Railroading Institute is dedicated to educating the public about steam era railroading in Michigan and the Great Lakes Region. This includes the preservation of the skills and technology for maintaining steam locomotives by operating steam era equipment and providing the experience of steam locomotives in actual operation.

The Steam Railroading Institute is dedicated to educating the public about steam-era railroading. The Institute is the home of the largest steam locomotive ever used in Michigan, Pere Marquette 1225. Now the Institute is starting on the restoration of its second locomotive, Chicago and North Western 175. The Institute will return this more than a century-year-old locomotive, and you will be able to ride behind it on excursion trains around Michigan.

Subsequently, in what is called the "water-gas shift reaction," the carbon monoxide and steam are reacted using a catalyst to produce carbon dioxide and more hydrogen. In a final process step called "pressure-swing adsorption," carbon dioxide and other impurities are removed from the gas stream, leaving essentially pure hydrogen. Steam reforming can also be used to produce hydrogen from other fuels, such as ethanol, propane, or even gasoline.

Of all the methods available for sterilization, moist heat in the form of saturated steam under pressure is the most widely used and the most dependable. Steam sterilization is nontoxic, inexpensive 826, rapidly microbicidal, sporicidal, and rapidly heats and penetrates fabrics (Table 6) 827. Like all sterilization processes, steam sterilization has some deleterious effects on some materials, including corrosion and combustion of lubricants associated with dental handpieces212; reduction in ability to transmit light associated with laryngoscopes828; and increased hardening time (5.6 fold) with plaster-cast 829.

Another design in steam sterilization is a steam flush-pressure pulsing process, which removes air rapidly by repeatedly alternating a steam flush and a pressure pulse above atmospheric pressure. Air is rapidly removed from the load as with the prevacuum sterilizer, but air leaks do not affect this process because the steam in the sterilizing chamber is always above atmospheric pressure. Typical sterilization temperatures and times are 132C to 135C with 3 to 4 minutes exposure time for porous loads and instruments.827, 837

Like other sterilization systems, the steam cycle is monitored by mechanical, chemical, and biological monitors. Steam sterilizers usually are monitored using a printout (or graphically) by measuring temperature, the time at the temperature, and pressure. Typically, chemical indicators are affixed to the outside and incorporated into the pack to monitor the temperature or time and temperature. The effectiveness of steam sterilization is monitored with a biological indicator containing spores of Geobacillus stearothermophilus (formerly Bacillus stearothermophilus). Positive spore test results are a relatively rare event 838 and can be attributed to operator error, inadequate steam delivery,839 or equipment malfunction.

Portable (table-top) steam sterilizers are used in outpatient, dental, and rural clinics.840 These sterilizers are designed for small instruments, such as hypodermic syringes and needles and dental instruments. The ability of the sterilizer to reach physical parameters necessary to achieve sterilization should be monitored by mechanical, chemical, and biological indicators.

The oldest and most recognized agent for inactivation of microorganisms is heat. D-values (time to reduce the surviving population by 90% or 1 log10) allow a direct comparison of the heat resistance of microorganisms. Because a D-value can be determined at various temperatures, a subscript is used to designate the exposure temperature (i.e., D121C). D121C-values for Geobacillus stearothermophilus used to monitor the steam sterilization process range from 1 to 2 minutes. Heat-resistant nonspore-forming bacteria, yeasts, and fungi have such low D121C values that they cannot be experimentally measured.841

Steam sterilization should be used whenever possible on all critical and semicritical items that are heat and moisture resistant (e.g., steam sterilizable respiratory therapy and anesthesia equipment), even when not essential to prevent pathogen transmission. Steam sterilizers also are used in healthcare facilities to decontaminate microbiological waste and sharps containers 831, 832, 842 but additional exposure time is required in the gravity displacement sterilizer for these items.

Protein sources with different degradabilities were fed to 48 lactating Holstein cows receiving 37 or 39% of dietary dry matter as steam-flaked sorghum (360 g/L), steam-flaked corn (360 g/L), or steam-rolled corn (490 g/L) in a 3 x 2 factorial arrangement of treatments. Cows were fed an alfalfa-based diet with 7% soybean meal or 5% of an animal-marine protein blend and 37 or 39% grain. Although not significant, cows fed flaked grain yielded a mean of 1.5 kg/d more milk than did those fed rolled grain. Gross feed efficiency was not affected by grain processing or protein source, but diets with the animal-marine protein blend had 9% higher estimated net energy for lactation than did diets with soybean meal. The greater gains in body weight and increased digestibility of the diets with the animal-marine protein blend verify the higher energy concentration of those diets. Yield of milk protein was increased by flaked grain or the animal-marine protein blend, and flaked grain increased percentages of lactose and solids nonfat. Increasing the ratio of rumen-degradable starch to rumen-degradable protein increased milk protein content and yield linearly and increased contents of lactose and solids nonfat. A linear response of dry matter, organic matter, crude protein, and starch digestibilities was observed as the ratio of rumen-degradable starch to rumen-degradable protein increased. These data show improved performance of dairy cows fed a high rumen-undegradable protein source with diets high in rumen-degradable starch from steam-processed grains.

Steam traps are self-actuated valves used to release condensate and air from steam distribution systems without allowing the passage of steam. Due to a wide range of process requirements, steam traps come in a variety of technologies, each with their own advantages and trade-offs. Steam traps play a large role in optimizing plant efficiency and environmental emissions, increasing the criticality when sizing and selecting the ideal steam trap for each application.

Steam headers, supply lines, drip lines, and pressure reducing stations are key components of the steam distribution system. Steam traps are essential elements that remove condensate and air, thereby optimizing steam distribution and reducing energy costs. Regulators ensure that steam is delivered to various processes at the desired pressures.

Condensate and heat recovery improve the efficiency of a steam system. If the system is equipped with a condensate recovery system, condensate is collected in a vessel and then transferred to the boiler for reuse. Similarly, flash tanks recover flash steam from condensate lines, which can be used for low pressure steam equipment. 0852c4b9a8

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