The method of fracturing of oil gas reservoir is considered as an instrumental one for maximizing the yield. Multiple loads in a well fracturing operation may compel tubing string to yield, break and/buckle in a permanent spiral, leading to severe financial deficit. Mathematical models for mechanical analysis of fracturing string in whole fracturing operation are developed on the basis of opera...

In a series of field experiments, we evaluate the influence of a small water pressure change on fracture aperture during a hydraulic test. An experimental borehole is instrumented at the Korea Atomic Energy Research Institute (KAERI) Underground Research Tunnel (KURT). The target fracture for testing was found from the analyses of borehole logging and hydraulic tests. A double packer system was...

When underground space requires excavation in areas below the water table, foundation system suffers from buoyancy, which leads to uplifting of superstructure. A deep can be used; however, cases where a hard layer is encountered, high driving forces and corresponding noises cause civil complaints urban areas. Micropiles an effective alternative option, due their performance despite short instal...

Methods: A total of 1050 pigs were assigned to pens (n = 48) on the basis of weight and gender. Average body weight at trial initiation was 78.5 kg. Four dietary treatments were randomly assigned to pens and stratified across weight and gender. Dietary treatments included control (0 g/ tonne RAC for 35 days); constant (5.0 g/ tonne RAC for 35 days); Step 2 (5.0 g/ tonne RAC for 14 days then 10....

Life history parameters of the primitively eusocial bee Augochlorella striata (Hymenoptera: Halictidae) are summarized for a population in central New York, and analyzed with respect to the evolutionary maintenance of eusociality in this species. High mortality (39%) of solitary foundresses and low mortality (12%) of social colonies indicate severe ecological constraints limiting independent (s...

While the postulates of Koch have never been fulfilled in granuloma inguinale, there is much presumptive evidence to indicate that Donovania granulomatis is the aetiological agent of the disease. The prototype of D. granulomatis was isolated originally by Anderson (1943), and since that time at least six other investigators (Beveridge, 1945; Dienst, 1948; Goldberg, Weaver, and Packer, 1953; Jen...