Two-Till Problem in Naugatuck-Torrington Area, Western Connecticut

Guidebook for field trips in Connecticut: New England Intercollegiate Geological Conference 60th annual meeting, Yale University, New Haven, Connecticut, October 25-27, 1968: Trip B-

Comparison of Several Methods of Predicting the Pressure Loss at Altitude Across a Baffled Aircraft-Engine Cylinder

Several methods of predicting the compressible-flow pressure loss across a baffled aircraft-engine cylinder were analytically related and were experimentally investigated on a typical air-cooled aircraft-engine cylinder. Tests with and without heat transfer covered a wide range of cooling-air flows and simulated altitudes from sea level to 40,000 feet. Both the analysis and the test results showed that the method based on the density determined by the static pressure and the stagnation temperature at the baffle exit gave results comparable with those obtained from methods derived by one-dimensional-flow theory. The method based on a characteristic Mach number, although related analytically to one-dimensional-flow theory, was found impractical in the present tests because of the difficulty encountered in defining the proper characteristic state of the cooling air. Accurate predictions of altitude pressure loss can apparently be made by these methods, provided that they are based on the results of sea-level tests with heat transfer

Behavior and Design of Axially Compressed Sheathed Wall Studs

The objective of this paper is to summarize efforts in a multi year project dedicated to developing a reliable design method for cold - formed steel wall studs that rely on sheathing for bracing. Testing on single columns with sheathing, and full - scale walls with sheathin g, are summarized. Particular emphasis is placed on the observed limit states given the different sheathing conditions. The sheathing supplies beneficial restraint to the wall studs and the stiffness of this sheathing - based restraint is characterized exper imentally and analytically. A unique application of the Direct Strength Method of design is explored where the sheathing - based restraint is used explicitly in determination of the elastic buckling loads of the wall studs, and then these elastic buckling lo ads are utilized to determine the strength. The test results are compared with the newly proposed design method as well as with previous design methods adopted by the AISI Specification. Good agreement is demonstrated for the new approach both in terms of strength an d limit states prediction

Results of turbojet engine operation tests using a 50-50 mixture of JP-4 and tributyl borate as the fuel

An experimental investigation was conducted on a centrifugal-type turbojet engine using a 50-50 mixture of tributyl borate and JP-4 as the fuel to determine the magnitude and the location of the boric oxide deposits in the engine as well as the effect of these deposits on the engine performance. Large deposits of boric acid formed in the combustor walls and on the turbine rotor and stator blades. The deposits had no effect on the engine thrust

LABORATORY AND FIELD STUDIES WITH AN AVIAN REPELLENT FOR SPROUTING SEEDS

Development of safe bird management techniques has become necessary for the economic survival of many parameters of agriculture. Competition between man and birds for resources has always occurred but has become increasingly complex as the human population increased. As man\u27s demand for additional food and fiber has required more intensive cultivation of arable land, certain birds have caused in¬creasingly costly losses. Bird damage has become so severe in some areas that till¬age of certain crops is threatened. In some situations, troublesome bird populations can be reduced to tolerable levels; however, the primary objective of bird management should be the alleviation of damage to crops and not destruction of birds. All birds possess beneficial qualities and federal or state laws protect most species. To avoid killing birds and still reduce bird damage to agricultural production, the potentially most useful approach to bird management is the development of non-toxic repellents. DRC-3324, a butyramide, is a chemical example of this approach to bird management. It was initially examined under laboratory conditions by Denver Wild¬life Research Center scientists following suggestion of candidacy for this purpose by Upjohn personnel. The chemical met all major criteria established for judging the relative potential of compounds for repellent purposes: the effective concentration was very low; the toxic concentration was substantially greater than the repellent level; it was relatively non-toxic to mammals; and was not phytotoxic to corn seed. The objective of these trials was to evaluate the effectiveness of the chemical under field conditions as a deterrent to red-winged blackbirds (Agelaius phoeniceus) and common grackles (Quiscalus quiscula) damaging freshly planted sweet-corn seed

LABORATORY AND FIELD STUDIES WITH AN AVIAN REPELLENT FOR SPROUTING SEEDS

Development of safe bird management techniques has become necessary for the economic survival of many parameters of agriculture. Competition between man and birds for resources has always occurred but has become increasingly complex as the human population increased. As man\u27s demand for additional food and fiber has required more intensive cultivation of arable land, certain birds have caused in¬creasingly costly losses. Bird damage has become so severe in some areas that till¬age of certain crops is threatened. In some situations, troublesome bird populations can be reduced to tolerable levels; however, the primary objective of bird management should be the alleviation of damage to crops and not destruction of birds. All birds possess beneficial qualities and federal or state laws protect most species. To avoid killing birds and still reduce bird damage to agricultural production, the potentially most useful approach to bird management is the development of non-toxic repellents. DRC-3324, a butyramide, is a chemical example of this approach to bird management. It was initially examined under laboratory conditions by Denver Wild¬life Research Center scientists following suggestion of candidacy for this purpose by Upjohn personnel. The chemical met all major criteria established for judging the relative potential of compounds for repellent purposes: the effective concentration was very low; the toxic concentration was substantially greater than the repellent level; it was relatively non-toxic to mammals; and was not phytotoxic to corn seed. The objective of these trials was to evaluate the effectiveness of the chemical under field conditions as a deterrent to red-winged blackbirds (Agelaius phoeniceus) and common grackles (Quiscalus quiscula) damaging freshly planted sweet-corn seed

DRC-1339 AND DRC-2698 RESIDUES IN STARLINGS: PRELIMINARY EVALUATION OF THEIR EFFECTS ON SECONDARY HAZARD POTENTIAL

DRC-1339 (3-chloro-4-methylbenzenamine HCI) is the active ingredient in Starlicide Complete, a commercial bait used to control starlings (Sturnus vulgaris) at animal feedlots throughout the U.S. Because of the recent widespread use of this product, par- ticularly within the wintering range of many raptors, they and other avian or mammalian scavenger or predator species may be exposed to large numbers of dead or dying star- lings and blackbirds (Icteridae) throughout the winter roosting season (November-March). Acute toxicity data are available for five species of raptors and a number of mammals indicating that DRC-1339 or its primary toxic metabolite DRC-2698 (N-(3-chloro-4-methylphenyl) acetamide, CAT), a potential roost toxicant, are only moderately toxic (100-300 mg/kg) to these animals. However, there are some avian and mammalian scavengers or predators to which these compounds are considerably more toxic (i.e., cats, owls, magpies). Secondary hazards have not been observed when DRC-1339 killed starlings were fed to three raptor species for as long as 141 days and to domestic cats for seven days (DeCino, Cunningham and Schafer 1966; Holler et al. 1979, unpubl, manuscript); however, the direct long-term effects of both chemicals have not been determined on raptors or other predatory or scavenger species. In order to decide if long-term studies are needed on predator or scavenger species, it is necessary to estimate accurately the degree of expected exposure to DRC-1339 and DRC-2698under actual use conditions. Since exposure will depend primarily upon the amount of these chemicals that remains in bird carcasses from bait ingestion until death, the metabolic or excretion rate of DRC-1339 and DRC-2698 must be known in target and at-risk, nontarget bird species. Although considerable data are available to determine the metabolic or excretion rate of DRC-1339 in target birds, some of these data are conflicting. We are therefore presenting the preliminary results of some of our current research with DRC-1339 and DRC-2698