Effect of slotted casing treatment on performance of a multistage compressor

A J85-13 engine was equipped with a compressor case that allowed changes to the case wall over the rotor tips of six of its eight stages. The engine was tested with four inlet configurations: uniform inlet flow, 180 degree circumferential distortion, hub radial distortion, and tip radial distortion. Slotted inserts were installed in the first three stages, and the compressor was mapped under similar conditions. Overall compressor performance obtained with tip treatment was inferior to the performance for the compressor's normal operating range. Pumping capacity with the slotted inserts was reduced. Overall compressor efficiency was reduced 1 to 2 percent with the slotted rings installed for 90 and 100 percent corrected engine speeds

Increasing Provider Knowledge of Medication Adherence in Veterans with Serious Mental Illness (SMI): A Quality Improvement Project

Background: Serious mental illness (SMI) among veterans represents a significant threat to individual and public health. Unfortunately, many mental health providers lack knowledge on the effective treatment of SMI, leading to potential gaps in patient care. Purpose/Methods: The purpose of this quality improvement project was to increase provider knowledge of care practices for patients with SMI. Using a single site, quasi-experimental, pre- /post-intervention framework, provider knowledge of SMI and its treatment were assessed before and following an educational module. Comparison of pre- and post-intervention knowledge scores was undertaken in an effort to determine if changes in scores were statistically significant. Results: A total of 10 providers at the practice site agreed to participate in the project including n = 6 females and n = 9 advanced practice nurses. Mean pre-test scores were 47% (SD = 4.33) and mean post-test scores were 92% (SD = 2.39). A Mann-Whitney U-test performed did indicate that the results were statistically significant. z = -6.33, p \u3c .000, n = 10, based on an alpha of .05. Conclusion: The results suggest that provider education at the practice site was correlated with knowledge gains that are statistically significant. Although the results suggest promising results for the educational program to increase provider knowledge of the treatment of SMI among veterans, the use of a single site and small sample limit the generalizability of the findings and indicate that further assessment of the educational intervention would be needed

An account of measurements of the mean range of Polonium-210 alpha particles in liquid water

A comprehensive account of seven previous measurements of the mean range of Polonum-210 alpha particles in liquid water is presented. Suggestions for obtaining more accurate range measurements are made. The importance of the mean range value to radiobiology is mentioned

Summer fallow and in-crop weed management programs in sugarcane (Saccharum spp. hybrids): control of perennial weeds and purple nutsedge (Cyperus rotundus L.) interference

In fallowed sugarcane fields, perennial weeds and sugarcane regrowth must be controlled to maximize productivity of sugarcane in the first production year. Isopropylamine salt of glyphosate applied in April at 1.68 kg ai/ha to 15 cm sugarcane provided 85% control 28 d after treatment (DAT). Control of sugarcane 56 DAT with isopropylamine and potassium salt formulations of glyphosate averaged 83% for 1.12 kg/ha. Bermudagrass control with glyphosate at 1.12 kg/ha was 86% 40 DAT and increased to 98% with a sequential application at 1.12 kg/ha. In comparing various combinations of tillage and glyphosate in summer fallow programs, bermudagrass ground cover was 37% in November for tillage alone compared to no more than 7% ground cover for the tillage/glyphosate and no-tillage/glyphosate programs. Perennial weed control was greater when glyphosate replaced a tillage operation. Purple nutsedge tubers were planted in 26.5 L pots with a surface area of 0.093m2 at densities of 0, 1, 2, 4, 8, and 16 tubers/pot along with a single node cutting of \u27LCP 85-384\u27 sugarcane to evaluate interference. At 64 days after planting, both purple nutsedge shoot and root (including tubers) dry weight increased as initial tuber density increased. Based on sugarcane shoot dry weight, critical weed density was four nutsedge tubers/pot. Using root dry weight, critical weed density was one nutsedge tuber/pot. The sugarcane variety \u27L 97-128\u27 was more competitive with purple nutsedge than LCP 85-384, \u27Ho 95-988\u27, and \u27HoCP 96-540\u27. In a shade response study, 30% shade reduced nutsedge shoot dry weight 75% compared with full sunlight. Field studies were conducted to evaluate purple and yellow nutsedge control in sugarcane with herbicides applied postemergence (POST) in September around 5 weeks after planting. Halosulfuron at 53.0 or 70.6 g/ha averaged 80% 4 weeks after treatment (WAT) and 77% 6 WAT. Control with the trifloxysulfuron at 15.7 g ai/ha was no more than 71% 6 WAT. Injury to sugarcane was not observed 6 WAT for either herbicide. In April of the following year, nutsedge control with the halosulfuron treatments averaged 74% compared with 44% for the trifloxysulfuron treatments, but sugarcane shoot population did not differ