Weathering problems

The. AMOCO project is furthest advanced and began operations in the latter part of 1977. The project was plagued by cold weather problems during part of the winter period but the operation is now underway and some very encouraging results are coming forward. 

Special weather problems, including freezing, fog, winterization, rain, snow, ice, high tides, and high temperatures Toxicity of construction materials Demolition safety... 

Eventually the tractor train arrived at Station 414 at the foot of the Horlick Mountains and was delayed there by lack of fuel. The resupply plane from Byrd Station had to turn back several times because of bad weather, problems with radio transmissions, and mechanical problems. While the group waited for several days for the plane. Bill Long and three of his companions decided to climb Ml Glossopteris which is one of the highest mountains in that part of Antarctica at 2,867 m above sea level. 

Monitoring the contents of stable isotopes by MS in the whole sample or in its individual constituents after GC has isolated them is an approach used to get around the weathering problems. It has been shown that the most common stable isotope parameter used (i.e., the ratio) may... 

The recent evidence of workmanship-related defects to major structures in extreme environments leaves a nagging doubt about weather the real issues behind the problems have really been understood, acknowledged and dealt with at all levels. 

A fermented-egg product (EEP), patented as an attractive bait for synanthropic flies, has been shown to be attractive to coyotes and repeUent to deer (79). Its components are variable, with relative concentrations of 77% fatty acids, 13% bases, and 10% (primarily) neutrals composed of at least 54 volatiles such as ethyl esters, dimethyl disulfide, and 2-mercaptoethanol. Synthetic formulations have been evaluated to find a replacement for a patented fermented-egg protein product that attracts coyotes and repels deer. Ten aUphatic acids (C-2 to C-8), four amines (pentyl, hexyl, heptyl, and trimethyl), dimethyl disulfide, 2-mercaptoethanol, and 54 more volatiles (C-1 to C-5 esters of C-1 to C-8 acids) have been tested as synthetic fermented egg (SEE) (80) in approximately the same proportions that are present in EEP. Weathering was a problem that caused decreased efficacy, which suggests trials of controUed-release formulations. Eourteen repeUents have been examined against white-taU deer in Peimsylvania in choice tests when treated onto sheUed com (81). 

Accelerator in Ready-Mix Concrete. Calcium chloride accelerates the set time of concrete giving it a high early strength development. It is not an antifreeze, but by using it duriag cold weather protection can proceed in a timely manner (31—34). In Russia, calcium chloride forms a component of several antifreeze admixtures (33). Reviews of the concerns and possible remedies of calcium chloride corrosion problems in concrete are available (21,35). There is no consensus on what the safe levels of calcium chloride in concrete are. 

Dipped Goods. Gloves with and without cloth support are a typical example. Unsupported appUcations involve specialty medical gloves and weather balloons. Eor CR to compete with less expensive natural mbber, it must provide added value. Natural mbber medical examination gloves contain proteins that can cause an allergic reaction in both patients and medical personnel. Polychloroprene gloves avoid the problem for those individuals, but are too expensive for general use. Natural mbber weather balloons have less lift than CR balloons and are rapidly attacked by ozone in the upper atmosphere. 

The increasing use of sihconized coatings for weather durabiUty caused severe masking problems for the all-metal, filter mesh-like catalyst elements available in the 1970s. Interest in catalytic afterburners increased when dispersed-phase precious metal—alumin a-on-ceramic honeycomb catalysts offered economically attractive results. 

Consider the problem of assessing the accuracy of a series of measurements. If measurements are for independent, identically distributed observations, then the errors are independent and uncorrelated. Then y, the experimentally determined mean, varies about E y), the true mean, with variance C /n, where n is the number of observations in y. Thus, if one measures something several times today, and each day, and the measurements have the same distribution, then the variance of the means decreases with the number of samples in each day s measurement, n. Of course, other fac tors (weather, weekends) may make the observations on different days not distributed identically. 

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