Changes in the Fish Community of Triplett Creek Following Restoration of a Channelized Reach

https://scholarworks.moreheadstate.edu/student_scholarship_posters/1256/thumbnail.jp

Introduction to Paleontology Research through the Boudreaux Bend Project

https://scholarworks.moreheadstate.edu/student_scholarship_posters/1058/thumbnail.jp

Size-selective concentration of chondrules and other small particles in protoplanetary nebula turbulence

Size-selective concentration of particles in a weakly turbulent protoplanetary nebula may be responsible for the initial collection of chondrules and other constituents into primitive body precursors. This paper presents the main elements of this process of turbulent concentration. In the terrestrial planet region, both the characteristic size and size distribution of chondrules are explained. "Fluffier" particles would be concentrated in nebula regions which were at a lower gas density and/or more intensely turbulent. The spatial distribution of concentrated particle density obeys multifractal scaling}, suggesting a close tie to the turbulent cascade process. This scaling behavior allows predictions of the probability distributions for concentration in the protoplanetary nebula to be made. Large concentration factors (>10^5) are readily obtained, implying that numerous zones of particle density significantly exceeding the gas density could exist. If most of the available solids were actually in chondrule sized particles, the ensuing particle mass density would become so large that the feedback effects on gas turbulence due to mass loading could no longer be neglected. This paper describes the process, presenting its basic elements and some implications, without including the effects of mass loading.Comment: 34 pages, 7 figures; in press for Astrophys. J; expected Jan 01 2001 issu

Developing a Design Center

The goal of this project was to determine the feasibility of a global design-themed Interactive Qualifying Project (IQP) center for WPI project teams by exploring opportunities in Japan as a pilot program. This was achieved by investigating interest in design at WPI, analyzing the current IQP system, and identifying project opportunities in Japan. We determined that a global design-themed IQP center was feasible due to the student and faculty interest in a design program within WPI, and that Japan is a suitable pilot location because of the unique design philosophies and project opportunities that exist in Kyoto. Therefore, we recommend that our sponsors follow our plan to create the Design Center, which will provide design projects at IQP centers around the globe, beginning with Japan

Software development methodology for high consequence systems

This document describes a Software Development Methodology for High Consequence Systems. A High Consequence System is a system whose failure could lead to serious injury, loss of life, destruction of valuable resources, unauthorized use, damaged reputation or loss of credibility or compromise of protected information. This methodology can be scaled for use in projects of any size and complexity and does not prescribe any specific software engineering technology. Tasks are described that ensure software is developed in a controlled environment. The effort needed to complete the tasks will vary according to the size, complexity, and risks of the project. The emphasis of this methodology is on obtaining the desired attributes for each individual High Consequence System

Stream fragmentation thresholds for a reproductive guild of Great Plains fishes

Impoundments, diversion dams, and stream dewatering have created a mosaic of largeriver fragments throughout the Great Plains of central North America. Coincident with thesehabitat changes are massive declines in the distribution and abundance of Great Plains fishesbelonging to the \u27pelagic-spawning\u27 reproductive guild. We analyzed longitudinal fragmentlengths (measured in river kilometers, rkm) and literature accounts of population status for eightspecies from this guild across 60 fragments to derive thresholds in stream length associated withextirpations. Fragment length predicted population status (F2,21 = 30.14, P \u3c 0.01), with lengthsaveraging 136 ± 21 rkm for extirpated, 226 ± 69 rkm for declining, and 458 ± 137 for stablepopulations. Fragment length explained 71% of reported extirpations and estimated thresholds infragment length explained 67% of variation in population persistence. Our findings provide insightinto appropriate spatial scales for conducting riverscape conservation approaches that addressthe hierarchical effects of fragmentation on stream-dwelling fishes