Satellite mobile data service for Canada

A commercial mobile satellite system which is to be constructed and operated in Canada is examined. This is done in two phases. First, mobile data services was introduced. Hub equipment and 3000 mobile data terminals were supplied. Over the satellite tests were performed. The mobile data service provides full two way digital messaging automatic vehicle location and fleet management services. The second phase is to construct, launch and make operational the MSAT satellite and associated network control facilities. The implementation is examined of the mobile data service in Canada, including the technical description. Marketing and applications are also examined

Some factors affecting the baking quality in wheat

ALTHOUGH between 10 per cent, and 15 per cent, of wheat consumed in Australia is used in feed for domestic animals, the primary usage in home consumption is for bread-making. Exports, which account for roughly 75 per cent, of the normal Australian crop, are also mainly used in bread-making

Development of a composite material with enhanced electromagnetic power dissipation characteristics

The present work was undertaken to enhance the productivity of manufacturing operations that involve heating materials by increasing the possibilities for electromagnetic heat processing of materials. The approach taken was to design a composite material with suitable mixture formulae to have prescribed electromagnetic loss characteristics. Investigation began by surveying industrial uses of electro-magnetic energy in heat processing of materials. From applications, the survey shifted to electromagnetic properties of materials with focus upon dielectric properties of materials. Several techniques were considered for altering the dielectric properties of a lossless plastic and the approach chosen was to dilute the base plastic with a lossy particulate. Investigation continued in the area of dielectric properties of mixtures and theoretical calculations of dielectric constant and loss factor were compared for various mixture theories. Dielectric samples were prepared and tested to compare theoretical mixture formulae calculations with experimental results of the dielectric constant and loss factor. Polystyrene was chosen for the base plastic because of its low loss VI characteristics and because it is relatively inexpensive and widely used. Aluminum was chosen for the loading material because of its loss characteristic and because a readily available supply of controlled shape and size existed. Three shapes ( sphere , disc, needle) of aluminum were compounded with the styrene at three (4, 11, 18) percent volume loadings. The mixtures were injection molded into dielectric specimen discs and silver electrodes were applied to the specimen faces. Samples measurements were made with Hewlett-Packard impedance analyzers and a modified General Radio micrometer electrode at discrete frequencies up to 100 MHz. A lumped element circuit model was developed for the fixtures and the fringe capacitance was empirically derived. A control-C program was written to extract dielectric constant and loss factor of the sample from the measured values of impedance. The results were compared with theory and discussed with respect to practical implications and continued work. Temperature rise of the loaded materials was predicted for localized irradiation with long wavelength electromagnetic energy for three filler types

The Plains of Mars, European War Prints, 1500-1825

Over fifty original prints by renowned artists from the sixteenth through the early nineteenth century, including Albrecht Dürer, Lucas Cranach, Théodore Géricault, and Francisco de Goya, among many others, are featured inThe Plains of Mars: European War Prints, 1500-1825. On loan from the Sarah Campbell Blaffer Foundation at the Museum of Fine Arts, Houston, the works of art included in this exhibition examine the topics of war and peace, propaganda, heroism, brutal conflicts, and the harrowing aftermath of battle. Spanning from the Renaissance to the Romantic periods and encompassing a wide geographic scope including Italy, Germany, France, Spain, the Low Countries, England, and North America, the prints depict triumphant Renaissance soldiers, devastating scenes of violence, and satirical caricatures of political figures. Also on display is Goya’s compelling “Disasters of War” series, completed in response to the brutality of the Spanish War of Independence. Goya’s prints serve as a powerful testament to the horrors faced by both soldiers and civilians. Under the direction of Professor Felicia Else and Shannon Egan, Melissa Casale ‘19 and Bailey Harper ‘19 have researched and written didactic labels, catalogue essays, and created an interactive digital interface to complement the exhibition. Together, Melissa and Bailey will lead public tours of the exhibition. A Gallery Talk by Prof. Peter Carmichael will draw connections between the depictions of warfare on view in the Gallery with representations of the American Civil War. James Clifton, Director of the Sarah Campbell Blaffer Foundation at the Museum of Fine Arts, Houston, will be delivering a lecture in conjunction with the exhibition. Dr. Clifton, who also serves as curator of Renaissance and Baroque painting at MFAH, curated the exhibition in its first iteration and wrote the exhibition catalogue (published by Yale University Press). Dr. Clifton’s lecture not only will provide an overview of the exhibition, but also will focus on the concept of “mediated war.” A full-color catalogue with images and essays by Bailey Harper ’19 and Melissa Casale ’19, under the supervision of Profs. Felicia Else and Shannon Egan, is planned to accompany the exhibition.https://cupola.gettysburg.edu/artcatalogs/1028/thumbnail.jp

Improving performance through HEI–industry engagements in the built environment

The poor performance and inefficiencies of the construction industry are well recognized and documented. Through a variety of combined industry and government initiatives there has been a continual expression in the UK over the last decade of the urgent need to address the fragmented nature of the industry to improve its performance. A major challenge is for education and industry stakeholders to create closer and more effective relationships with each other to facilitate greater mutual understanding. ‘Accelerating Change in Built Environment Education’ (ACBEE) is a sponsored initiative designed to encourage the closer working together of industry, education and professional bodies to provide more relevant training and education. This paper introduces ACBEE, along with an evaluation framework for measuring the performance of engagements at various levels. This is followed by an analysis of the application of this performance measurement framework through case studies of industry–education engagement. A number of case studies were identified as operating at the grades of ‘strategic alliance’ and ‘partnership’ (as classified in the ACBEE evaluation framework). The analysis of these cases focuses on the drivers behind and the purpose of the engagement, and how these are aligned with the business strategy of the collaborating organizations and measurement of the activity. Evidence of meeting the explicit business needs and strategic objectives and the contribution to good practice knowledge are also discussed

Using a task-based approach in evaluating the usability of BoBIs in an e-book environment

This paper reports on a usability evaluation of BoBIs (Back-of-the-book Indexes) as searching and browsing tools in an e-book environment. This study employed a task-based approach and within-subject design. The retrieval performance of a BoBI was compared with a ToC and Full-Text Search tool in terms of their respective effectiveness and efficiency for finding information in e-books. The results demonstrated that a BoBI was significantly more efficient (faster) and useful compared to a ToC or Full-Text Search tool for finding information in an e-book environment

Effects of oilseed meal and grain-urea supplements fed infrequently on digestion in sheep: 1. Low quality grass hay diets

An experiment examined intake, growth response and rumen digestion of young sheep fed ad libitum low quality grass hay alone or supplemented with approximately isonitrogenous amounts of barley grain and urea (Bar/N), safflower meal (SAF) or linseed meal (LIN) provided at 3 days intervals. Supplements comprised 13–20% of total DM intake. Sheep fed grass hay alone consumed 60.2gDM/kgLW0.75/day of hay and an estimated 6.09MJ metabolizable energy (ME)/day, and were in liveweight (LW) maintenance. Hay intake was decreased (P<0.05) by the Bar/N supplement with a substitution rate of 0.9, but was not changed by the oilseed meal supplements. Each of the supplements increased (P<0.05) estimated ME intake to a similar extent, but LW gain and wool growth were lower (P<0.05) in sheep supplemented with Bar/N than those supplemented with LIN. Rumen degradabilities of the SAF and LIN CP were estimated to be 0.72 and 0.62, respectively. Rumen ammonia concentrations in sheep fed hay alone (average 97mgNH3/l) were expected to be adequate for microbial activity. Fractional outflow rate (FOR) of liquid from the rumen measured with Co-EDTA (mean 0.109h−1) was greater than that of Cr-mordanted supplements (mean 0.056h−1), which was in turn greater than the FOR of Cr-mordanted hay (mean 0.031h−1). Diet did not affect these FOR. Supplemented sheep accommodated increased DM intake on Day 1 of the 3 day supplementation cycle by increasing rumen digesta load rather than by increasing rate of passage of digesta. Results show that the LW gain of young sheep fed low quality hay was increased more by either oilseed meal than by equivalent amounts of barley grain/urea supplement, apparently due to more efficient utilization of ME for LW gain