Performance Of Set Research Articles

INVESTIGATION OF THE INFLUENCE OF MICROWAVE RADIATION ON THE PROPERTIES OF GRANULAR HEAT INSULATION MATERIALS BASED ON LIQUID GLASS

The main methods of improving the performance of granular thermal insulationmaterials based on liquid glass are chemical methods of their modification, which are based onchanging their structure through the use of special ingredients. At the same time, there is a need to introduce often a large number of components and individual technological operations, which is notalways technological. One of the promising methods of changing the physical state of substancesunder the action of an electromagnetic field is non-thermal treatment of microwave radiation. Theadvantages of using microwave radiation in comparison with the generally accepted methods ofmodification of materials are the transformation of their structure without significant changes in thetechnological process and the need to use additional components. Due to volumetric heating and themechanism of non-thermal action of microwave radiation on processing objects the duration of theirheating considerably decreases. When microwave heating of a liquid glass composition part of theenergy of electromagnetic radiation is converted into heat, which contributes to the intense swellingof the material, and the other part is aimed at structural changes in the material, which improve itsproperties due to the non-thermal effect of microwave radiation. Studies show that the best set ofperformance properties have granular materials obtained under the action of microwave radiationat a power of 650 W, which corresponds to a temperature of 110-120 0C. The required duration ofsuch heat treatment is 6-7 minutes. The closest to them in terms of coefficient of swelling are materialsobtained by convective heating at a temperature of 200 0C for 1 hour, but their physical andmechanical properties are much lower. Thus, it can be noted that the use of microwave radiationallows to obtain granular thermal insulation materials with a better set of performance properties atlower energy costs for their production.

Social leadership: part 2: Social network

How can social leadership improve a setting's performance, and what implications does this have for the wider sector? Mona Sakr, senior lecturer in early childhood at Middlesex University, explains

Evaluation of Shear Resistance of Bolted Connections in Wood/Wood and Wood/Steel Plate/Wood

This study was based on the combination of simple and quick techniques to substitute the conventional manufacturing system assembly of metal truss connected by wood structures for free environments and less movement. Although simple in its use, the bolted connections are extremely complex in their analysis and behavior. The study was based on evaluating bolted wood/wood and wood/wood with a metal divider interface connections, just to observe the strength of the set's performance under real loads of support coming from the roof elements of the work. Load tests to evaluate the shear behavior nonlinear of the connecting bolts were carried out with loads until 10 ton. On prototypes previously dimensioned according to NBR 6120 to determination of the values of the loads, with two, three and four bolts of the type SAE J 429 grade 5. It was observed that the insertion of a metal plate between the pieces of wood increased by about 50% in the shear strength of the connection. The models A1 and B1, with two bolts with or without plate, were the ones with least resistance, while with three bolts were most loads resisted. Simulations with FEMAP-Finite Element Modeling and Post-processing/NASTRAN were performed for comparison.

Shared Molecular Pathways in Inflammatory Bowel Disease and Irritable Bowel Syndrome Suggested by Genomic Biomarkers

Purpose: Current understanding of Inflammatory Bowel Disease (IBD) and Irritable Bowel Syndrome (IBS) holds them as completely distinct entities, with IBD as an organic disease and IBS as a functional syndrome. Some studies hypothesize a relationship between the two disorders. A better understanding of the molecular pathways involved in the causation or response mechanisms of these two disorders would advance diagnostic testing and treatment of patients. We describe here the overlap of two sets of gene expression biomarkers that have significant diagnostic ability in IBD and IBS. Methods: We applied Exagen's proprietary in silico data analysis engine1 Coperna™ to publicly available full-genome expression microarray data from 85 IBD patients and 42 normal controls2. Results of those discovery phase IBD analyses were used to select a small set of 10 genes for diagnostic performance optimization in this independently ascertained pilot study of prospective cohorts of 91 patients with Ulcerative Colitis, 98 patients with Crohn's Disease, 98 patients with IBS, and 98 healthy individuals free from GI symptoms. Each IBD and IBS patient was diagnosed by a board-certified gastroenterologist. The IBD diagnoses were confirmed by endoscopy; the IBS diagnoses used Rome I criteria. The study was IRB approved and all subjects gave informed consent. Peripheral blood samples and clinical data were collected from all patients. Expression data were obtained from peripheral whole blood samples (with no mononuclear enrichment) by isolating total mRNAs, synthesizing cDNAs, and performing real-time quantitative PCR. Expression levels of the 10 candidate biomarker genes were assayed on each patient specimen and normalized to a within-patient reference gene. Results: Optimal scoring algorithms for classification of patients as IBD versus normal and IBS versus normal were derived separately using the expression levels of the 10 genes assayed in these pilot study patients. The optimal gene set for each test and each set's performance is indicated in Table 1. The classification results had odds ratios of 23.0 and 28.3, respectively, with both P-values < 2 × 10−16. Two genes were common to both diagnostic marker sets.Table 1: Highly significant expression biomarker sets in IBD and IBS*.Conclusion: The genes identified as diagnostic for the comparisons in this pilot study reveal an overlap between IBD and IBS patients. This overlap of highly statistically significant biomarkers suggests a shared biology. Additional studies are necessary to determine whether these genes have a causative role or are part of a common response mechanism.

Selection, setting and streaming in language teaching

The progress of fourth-year pupils in two neighbouring schools was assessed over a full academic year. Within each school the gains made by an upper set were compared with those made by a lower set. In the grammar school, where sets were formed on entry to the school, the lower set's performance was inferior to that of the pupils of the comprehensive school—where mixed ability groups were kept through the first two years of French. In both schools the lower groups made gains which were just as impressive as those made by the upper groups; although of course these gains were from a lower starting base. Lower group pupils in both schools were found to be as proficient as the upper group pupils in certain skills; but these skills, largely receptive, are undervalued by present examinations. In consequence, subsequent examination results will appear to support the schools' criteria for forming sets. A relationship between attitudes, motivation and proficiency was clearly evident. Although the conclusions are based on a specific schools system, their implications have much wider applicability.