Effects of Surface Pace in Baseball

A baseball travels across different surfaces at different paces. The goal of this experiment is to find a percentage difference in speeds the ball will reflect off a given surface. The ratio between the initial speeds and final speeds will be known as the coefficient of restitution and will be used to compare the pace of the two surfaces. In the Northwest Conference, NCAA Division III teams play on four turf-based infields and five dirt-based infields

Efficiency of aerosol collection on wires exposed in the stratosphere

The theory of inertial impaction is briefly presented. Stratospheric aerosol research experiments were performed duplicating Wong et al. experiments. The use of the curve of inertial parameters vs particle collection efficiency, derived from Wong et al., was found to be justified. The results show that stratospheric aerosol particles of all sizes are collectible by wire impaction technique. Curves and tables are presented and used to correct particle counts for collection efficiencies less than 100%

Server assignment in mirrored server environments

Massively multiplayer online games (MMOGs) may use peer-to-peer, client-server, or mirrored-server environments. Since there exist multiple server options in mirrored server environments, a problem arises when deciding to which server each player should connect. We propose three distinct algorithms that assign players within Quality of Service (QoS) as each player joins and leaves, taking into consideration whether a player already in QoS can be moved to place a newly joining player in QoS without sacrificing QoS for the moved player. Our results show that for certain numbers of servers and values of QoS, our algorithms increase the total number of players in QoS over a static player to server assignment, and bears adapting to a wider variety of environments

Ontological Functionalism: You are an Abstract Computer

The Following thesis explores the application of machine-state functionalism in ontology. I take the position that physical things are explainable in terms of a Turing machine originating in abstracta and can, therefore, be reduced to abstracta

Should the ApoE genotype be a covariate for clinical trials in Alzheimer disease?

Should the apolipoprotein E (ApoE) genotype be a covariate for clinical trials in Alzheimer disease (AD)? ApoE is a transport protein for lipids, amyloid-beta proteins, and the different phenotypes differentially affect amyloid-beta deposition, neurofibrillary tangle formation, and microglial activation. The ApoE genotype has not affected efficacy in short symptomatic AD trials. ApoE4 has been associated with greater efficacy in at least two mild cognitive impairment studies. Vasogenic edema was more frequent in ApoE4 AD patients treated with a monoclonal antibody to amyloid beta. Since there is evidence that the ApoE genotype may differentially affect disease mechanisms, efficacy, and adverse effects in both AD and mild cognitive impairment trials, the ApoE genotype should be included as a covariate in future studies

Dust Storms in Space?

Primarily from the Pioneer 8 and 9 results, it is concluded that the flux of picogram sized dust particles near the earth's orbit has been constant to within the observational limits over three years of observation. In particular, since dust streams are not observed, they cannot explain microphone detected events. However, the possibility of rare events due to dust blown directly off a cometary nucleus (such as that reported for Comet Bennett) cannot be completely ruled out