PS Magazine 1953 Series Issue 012

PS Magazine, also known as the Preventive Maintenance Monthly, is an official publication of the Army, providing information for all soldiers assigned to combat and combat duties. The magazine covers issues concerning maintenance, maintenance procedures and supply problems.https://scholarscompass.vcu.edu/psm/1011/thumbnail.jp

PS Magazine 1958 Series Issue 074

PS Magazine, also known as the Preventive Maintenance Monthly, is an official publication of the Army, providing information for all soldiers assigned to combat and combat duties. The magazine covers issues concerning maintenance, maintenance procedures and supply problems.https://scholarscompass.vcu.edu/psm/1073/thumbnail.jp

PS Magazine 1959 Series Issue 081

PS Magazine, also known as the Preventive Maintenance Monthly, is an official publication of the Army, providing information for all soldiers assigned to combat and combat duties. The magazine covers issues concerning maintenance, maintenance procedures and supply problems.https://scholarscompass.vcu.edu/psm/1080/thumbnail.jp

Deflection and frequency monitoring of the Forth Road Bridge, Scotland, by GPS

Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees. Copyright © 2012 Thomas Telford Ltd.The use of carrier phase kinematic GPS (global positioning system) has evolved into a reliable technique to measure both the three-dimensional magnitudes and frequencies of movements of structures. Techniques have been developed that tackle errors caused by multipath, tropospheric delay and issues relating to satellite geometry. GPS-derived movements compare well with data from both design predictions and structural models. Results from field trials carried out on the Forth Road Bridge are presented. This paper brings together key results that outline the procedure as well as a series of new data that indicate other potential applications. GPS data were collected continuously over a period of 46 h at a minimum rate of 10 Hz. During the trials wind speed, wind direction, relative humidity and temperature were also recorded. Frequently there was very heavy traffic flow, and at one point a special load (a 100-t lorry) passed over simultaneously to the heavy daytime flow of traffic. Data from a planned load trial during a brief bridge closure are reported and compared with the limited results available from a finite element model. Measured vibration frequencies are also computed from GPS data and compared with those given in the literature. In addition, results indicating the change in structural characteristics are also presented – in particular changes of mass associated with changes in traffic loading are observed. The results show the performance of GPS as it has developed in recent years, and that it can now reliably be used as a significant part of structural health monitoring schemes, giving both the magnitude of quasi-static deflections in known time periods and hence the frequency of dynamic movements of structures.Forth Estuary Transport Authorit

PS Magazine 1969 Series Issue 204

PS Magazine, also known as the Preventive Maintenance Monthly, is an official publication of the Army, providing information for all soldiers assigned to combat and combat duties. The magazine covers issues concerning maintenance, maintenance procedures and supply problems.https://scholarscompass.vcu.edu/psm/1203/thumbnail.jp

PS Magazine 1959 Series Issue 080

PS Magazine, also known as the Preventive Maintenance Monthly, is an official publication of the Army, providing information for all soldiers assigned to combat and combat duties. The magazine covers issues concerning maintenance, maintenance procedures and supply problems.https://scholarscompass.vcu.edu/psm/1079/thumbnail.jp

Analysis of Potential and Efficiency of Electric Generation Using Thermoelectric Effect

This research identifies the electrical potential associated with Thermoelectric Generators (TEG) under the incidence of solar rays and performs efficiency comparison using this type of devices and those photovoltaic. TEG characterization and modeling is presented to favor the estimation of the electrical potential, defined as power density (W/m2). The proper operation of thermal harvesting lays in maintaining a temperature difference of at least 26.31K between the TEG sides. With this requirement fulfilled, power conversion eficiencies of about 26.43% are obtained, higher than that of high-quality solar panels and without efficiency reductions associated with heating and soiling, while keeping the same superficial area of only 16cm 2. An estimate of at least 407.3mW corresponding to 2.44Wh of available energy is found considering specific operation hours determined statistically for a given geographic location. Thus, given such performance metric, a complete power unit is devised complementing the thermoelectric energy harvesting with a Li-Po battery to guarantee in that way a continuous operation. The total energy available from the prototype allows maintaining a battery discharge percentage of 38.05% considering the energy budget of a low-power remote sensor.MaestríaMagister en Ingeniería Electrónic

PS Magazine Issue Index Issues 001-093

PS Magazine, also known as the Preventive Maintenance Monthly, is an official publication of the Army, providing information for all soldiers assigned to combat and combat duties. The magazine covers issues concerning maintenance, maintenance procedures and supply problems.https://scholarscompass.vcu.edu/psm/1232/thumbnail.jp

Evaluation of Social License for the Forest Products Industry in Houghton County, Michigan

This research investigates how the local community grants social license to the forest products industry in Houghton County, Michigan. Interviews were conducted with industry and community stakeholders using a snowball sampling method to understand perspectives on the social license continuum. The viability of supply chains and individual industry sectors associated with forest resources in the county are largely governed by macroeconomics. However, there is a very local component that allows individual corporations to operate within the community. The data analysis, based on the interviews, focuses on understanding local perceptions of natural resource management and community relations. The results reflect social license has a spatial variation that allows local industry a higher degree of license than non-local. With an absence of community engagement and emerging forms of stakeholder communication in Houghton County, the social license possessed by the forest products industry could be vulnerable to disturbances that may accompany changes in operations