12,223 research outputs found
Using the Internet for Organizational Research: A Study of Cynicism in the Workplace
The Internet can be a valuable data collection tool for organizational psychology researchers. It can be less expensive than traditional paper-and-pencil survey methods, and the potential pool of participants is much larger. In addition, it can be used in situations where traditional data collection methods are not feasible, such as research involving sensitive issues such as negative employee attitudes or deviant behaviors at work. In this study, we examined the organizational attitudes of employees from various companies using (a) a snowball sample, who completed a traditional paper and pencil survey (n = 135), and (b) a sample recruited over the Internet, who completed an on-line survey (n = 220). Participants in both the non- Internet and the Internet group were asked to describe a negative incident involving their company, and answer a number of questions regarding how they felt about their company and how they behaved toward their company following the negative event. They also completed measures of organizational cynicism and job satisfaction. The two groups were compared on demographic characteristics and on their attitudes toward their organization. There were very few demographic differences between the two groups. The Internet group tended to be more cynical and to judge their organization more harshly than the non-Internet group; however, the response patterns of both groups were similar. These results suggest that, when used with caution, the Internet can be a viable method of conducting organizational research
Airborne microbial monitoring in an operational cleanroom using an instantaneous detection system and high efficiency microbial samplers
The airborne microbial contamination in a non-unidirectional airflow cleanroom, occupied by personnel wearing either full cleanroom attire or only cleanroom undergarments was simultaneously determined using an instantaneous microbial detection (IMD) system and efficient microbial air samplers that detected both aerobic and anaerobic microbes. Depending on the type of cleanroom clothing, the IMD system recorded between 7 to 94 times more ‘biological’ particles than microbe carrying particles (MCPs) recovered by the air samplers. Change in the airborne concentration of ‘biological’ particles due to the different clothing was not consistent with the change in the concentration of MCPs. The median size of the ‘biological’ particles was smaller than the MCPs and the associated particle size distributions were considerably different. A number of sterile materials in the cleanroom were shown to disperse substantial quantities of ‘biological’ particles and it was concluded that the number of particles of microbiological origin, and the relationship between the counts of ‘biological’ particles to MCPs, were masked by non-microbial fluorescent particles dispersed from these materials. Consequently, adequate monitoring of this type of cleanroom operation to confirm appropriate airborne microbiological contamination control, using only an IMD system of the type used for this programme of work, is considered to be unfeasible. However, if the IMD system could be improved to more accurately differentiate between micro-organisms and non-microbial fluorescent particles, or if the dispersion of fluorescent particles from nonmicrobiological cleanroom materials could be reduced, then this system should provide an effective cleanroom airborne monitoring method
A three channel telemetry system
A three channel telemetry system intended for biomedical applications is described. The transmitter is implemented in a single chip using a 2 micron BiCMOS processes. The operation of the system and the test results from the latest chip are discussed. One channel is always dedicated to temperature measurement while the other two channels are generic. The generic channels carry information from transducers that are interfaced to the system through on-chip general purpose operational amplifiers. The generic channels have different bandwidths: one from dc to 250 Hz and the other from dc to 1300 Hz. Each generic channel modulates a current controlled oscillator to produce a frequency modulated signal. The two frequency modulated signals are summed and used to amplitude modulate the temperature signal which acts as a carrier. A near-field inductive link telemeters the combined signals over a short distance. The chip operates on a supply voltage anywhere from 2.5 to 3.6 Volts and draws less than 1 mA when transmitting a signal. The chip can be incorporated into ingestible, implantable and other configurations. The device can free the patient from tethered data collection systems and reduces the possibility of infection from subcutaneous leads. Data telemetry can increase patient comfort leading to a greater acceptance of monitoring
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Donovan’s conjecture, blocks with abelian defect groups and discrete valuation rings
We give a reduction to quasisimple groups for Donovan’s conjecture for blocks with abelian defect groups defined with respect to a suitable discrete valuation ring O. Consequences are that Donovan’s conjecture holds for O-blocks with abelian defect groups for the prime two, and that, using recent work of Farrell and Kessar, for arbitrary primes Donovan’s conjecture for O-blocks with abelian defect groups reduces to bounding the Cartan invariants of blocks of quasisimple groups in terms of the defect. A result of independent interest is that in general (i.e. for arbitrary defect groups) Donovan’s conjecture for O-blocks is a consequence of conjectures predicting bounds on the O-Frobenius number and on the Cartan invariants, as was proved by Kessar for blocks defined over an algebraically closed field
Development of low modulus material for use in ceramic gas path seal applications
Three candidate materials were examined: Brunsbond (R) Pad; plasma sprayed porous NiCrAlY; and plasma sprayed low modulus microcracked zirconia. Evaluation consisted of mechanical, thermophysical, and oxidation resistance testing along with optical microscopy and a feasibility demonstration of attaching the material to a suitable substrate. The goals of the program were the following: feasibility of fastening or depositing the low modulus system onto a broad range of substrate alloys; feasibility of depositing or forming the low modulus system to a thickness of 0.19 cm to 0.38 cm; potential to attain a modulus of elasticity in the range of 3.4 to 6.9 GPa (0.5 to 1.0 MSI), and an ultimate strength of 17.2 MPa (2.5 ksi); suitable thermal conductivity; and static oxidation life of at least 1000 hours at 1311 K. The results of the program indicate that all three systems offer attractive properties as a strain isolator material
Scaling of data communications for an advanced supercomputer network
The goal of NASA's Numerical Aerodynamic Simulation (NAS) Program is to provide a powerful computational environment for advanced research and development in aeronautics and related disciplines. The present NAS system consists of a Cray 2 supercomputer connected by a data network to a large mass storage system, to sophisticated local graphics workstations and by remote communication to researchers throughout the United States. The program plan is to continue acquiring the most powerful supercomputers as they become available. The implications of a projected 20-fold increase in processing power on the data communications requirements are described
Data communication requirements for the advanced NAS network
The goal of the Numerical Aerodynamic Simulation (NAS) Program is to provide a powerful computational environment for advanced research and development in aeronautics and related disciplines. The present NAS system consists of a Cray 2 supercomputer connected by a data network to a large mass storage system, to sophisticated local graphics workstations, and by remote communications to researchers throughout the United States. The program plan is to continue acquiring the most powerful supercomputers as they become available. In the 1987/1988 time period it is anticipated that a computer with 4 times the processing speed of a Cray 2 will be obtained and by 1990 an additional supercomputer with 16 times the speed of the Cray 2. The implications of this 20-fold increase in processing power on the data communications requirements are described. The analysis was based on models of the projected workload and system architecture. The results are presented together with the estimates of their sensitivity to assumptions inherent in the models
Housing Crisis in Haiti post 2010 Earthquake
This paper is an analysis of the post-disaster housing crisis in Haiti following the 2010 earthquake that left hundreds of thousands dead and millions homeless. Lack of strategic planning, and overpopulated areas contributed to the widespread devastation that is present in Haiti. Reviewing secondary data, and collecting primary data from a short trip to Haiti, has helped to establish all the issues that contributed to the housing crisis in Haiti. Housing design, location, accessibility, land rights, and affordability are the biggest challenges that people are still facing. Aid poured into the nation to help rebuild the broken infrastructure, though was not met with overall success. The government was unable to mobilize the aid and resources to pick up the pieces and work towards finding a housing solution for all of the people who are displaced. NGOs work to mobilize the resources they have, but are met with challenges of land rights, housing design, and lack of reconstruction knowledge. As different types of housing were being implemented, the lack of consistency among the government and NGOs led to money being misused, causing people to not have a durable housing solution. Nearly seven years later, thousands of people are still living in camps, with little resources and no sight of finding a more permanent solution
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