Northern Pike Production in Phalen Pond, Minnesota

In this study, certain physical, chemical and biological conditions were observed in order to relate them to the development and survival of eggs and young northern pike in a small pond. The spawning period lasted one week and was interrupted by unfavorable weather. Low temperature caused the eggs to develop at a rate slower than the rate other workers have shown to be normal. Many eggs between stages II and Ill appeared to be developing abnormally and were perhaps reacting to an unsuitable environmental condition. Since 90% of all eggs completed development, neither slow nor abnormal development increased the egg mortality rate. The young pike fed selectively on Cladocera rather than other types of plankton present and did not utilize small rotifers as food. Scarcity of plankton appears to have been the major factor restricting northern pike production. Growth rates of pike on different sides of the pond correspond directly to the distribution of plankton. When plankton was not abundant, growth was slow, the quantity of food per stomach was low, and many fish had not fed. It is possible that most young pike died because they were attacked or eaten by other pike, but a low density of plankton shortly after hatching apparently triggered the outbreak of cannibalism

Space debris characterization in support of a satellite breakup model

The Space Kinetic Impact and Debris Branch began an ambitious program to construct a fully analytical model of the breakup of a satellite under hypervelocity impact. In order to provide empirical data with which to substantiate the model, debris from hypervelocity experiments conducted in a controlled laboratory environment were characterized to provide information of its mass, velocity, and ballistic coefficient distributions. Data on the debris were collected in one master data file, and a simple FORTRAN program allows users to describe the debris from any subset of these experiments that may be of interest to them. A statistical analysis was performed, allowing users to determine the precision of the velocity measurements for the data. Attempts are being made to include and correlate other laboratory data, as well as those data obtained from the explosion or collision of spacecraft in low earth orbit

Function-based Intersubject Alignment of Human Cortical Anatomy

Making conclusions about the functional neuroanatomical organization of the human brain requires methods for relating the functional anatomy of an individual's brain to population variability. We have developed a method for aligning the functional neuroanatomy of individual brains based on the patterns of neural activity that are elicited by viewing a movie. Instead of basing alignment on functionally defined areas, whose location is defined as the center of mass or the local maximum response, the alignment is based on patterns of response as they are distributed spatially both within and across cortical areas. The method is implemented in the two-dimensional manifold of an inflated, spherical cortical surface. The method, although developed using movie data, generalizes successfully to data obtained with another cognitive activation paradigm—viewing static images of objects and faces—and improves group statistics in that experiment as measured by a standard general linear model (GLM) analysis

Archives of the Southern Sociological Society: A Repository of Decisions, Events, and People Affecting Sociology in the Southern United States

Since 1958, the Archives of the Southern Sociological Society have been housed in the Special Collections Research Center in the University of Kentucky Libraries. The collection includes official minutes, correspondence, newsletters, membership lists, photographs, and other official documents generated by the Society and dating from the Society\u27s founding in 1935 to the present. These records of historical value have been provided by presidents, secretaries, treasurers, committee chairs, executive officers, and other Society officials so that the Archives may be available to scholars who wish to explore the history of the Society and the development of Sociology in the Southern United States. Drawing on research and sources in the Archives, these seven posters highlight the following topics: planning and establishing the Southern Sociological Society; the first annual meeting (held in 1936 at the Atlanta Biltmore); challenges of developing a racially inclusive organization in the segregated South; stances toward social issues in the early 1960s; changes in emphases and breadth of conference session topics across the decades; photographs highlighting fashion and leadership; and meeting locations and membership numbers

A Systematic Literature Review and Functional Decomposition Summarizing Eusocial Insect Parasite Resistance: A Tool for Biologically Inspired Design

Resilience is a vital component of multi-agent systems, as a lack of resilience can easily lead to system failure. Resisting the effects of faulted agents can reduce system costs and downtime. Solving the problem of increasing system resilience is not an easy one, however, as some solutions require complex solutions. Eusocial insects face these challenges often, thus making them prime examples to find unique biological solutions to resilience. As such the central question of this work is: What behaviors in eusocial insects can be used to improve muli-agent system resilience to faulted agents? In this work the connection between eusocial insect behaviors and faulted agent resilience is explored, as well as the transfer of these behaviors to generalized functions for multi-agent systems. The hypothesis examined in this work is: if functional decomposition is performed on eusocial insect behaviors for faulted agent resilience, then generalized functions for multi-agent system faulted agent resilience can be identified. This work’s primary contribution is the identification of several generalized functions that can increase resilience to faulted agents, based on eusocial insect behaviors. These functions will provide the basis for future work in biologically inspired design and faulted agent resilience

Nucleation at the DNA supercoiling transition

Twisting DNA under a constant applied force reveals a thermally activated transition into a state with a supercoiled structure known as a plectoneme. Using transition state theory, we predict the rate of this plectoneme nucleation to be of order 10^4 Hz. We reconcile this with experiments that have measured hopping rates of order 10 Hz by noting that the viscosity of the bead used to manipulate the DNA limits the measured rate. We find that the intrinsic bending caused by disorder in the base-pair sequence is important for understanding the free energy barrier that governs the transition. Both analytic and numerical methods are used in the calculations. We provide extensive details on the numerical methods for simulating the elastic rod model with and without disorder.Comment: 18 pages, 15 figure

Matlab application for fitting progress curves to the Equilibrium Model

The general procedures for carrying out the necessary rate determinations required for accurate determination of the Equilibrium Model parameters, and fitting this data to the mathematical model to generate the parameters, are described in "Peterson, M.E., Daniel, R.M., Danson, M.J. & Eisenthal, R. (2007) The dependence of enzyme activity on temperature: determination and validation of parameters. Biochemical Journal, 402, 331-337". It should be borne in mind that the Equilibrium Model equation contains exponentials of exponentials – quite small deviations from ideal behaviour, or a failure to obtain true Vmax values, may lead to difficulty in obtaining reliable Equilibrium Model parameters

The Interfering Effect of Emotional Stimulus Functions on Stimulus Equivalence Class Formation: Implications for the Understanding and Treatment of Anxiety

The present experiment examined the effects of respondently conditioned emotional functions on the formation of stimulus equivalence relations. Fifty-seven participants were exposed to a stimulus-pairing procedure that paired six nonsense syllables with aversive images, and a further six stimuli with neutral images. A second phase established different operant response functions for one aversive CS and one neutral CS. In Phase 3, 45 of the 57 participants demonstrated a transfer of the established operant response to stimuli sharing respondent functions, thereby demonstrating the formation of two functional classes. Using a between-subjects design, participants were then exposed to a conditional discrimination training and testing protocol designed to establish two three-member stimulus equivalence relations using either six aversive or six emotionally neutral CSs as stimuli. Participants required significantly more testing trials to form stimulus equivalence relations when all stimuli had emotionally aversive functions compared to neutral functions. Implications of this study for the treatment of clinical anxiety are considered. Keywords: Functional Stimulus Classes, Anxiety, Stimulus Equivalence, Functional Equivalence, Humans

Comparing impingement boiling vs. pool boiling to improve technological insight into liquid cooling in electronics [abstract]

Abstract only availableWith the field of technology advancing at a rapid pace so must the technology behind cooling these electronic parts. My research compares two completely different of cooling operations and compares many different fluids in each method. This research will help lead the electronics industry into the future of liquid cooling. The first method is impingement boiling where jets of fluid spray a heated copper coupon and as the fluid rapidly boils it removes large amounts of heat. Jet arrays will be tested for one jet, four jets, and nine jets. Also we will experiment with different sorts of surface finishes on the heated copper coupon to see how this affects heat transfer. The three fluids that will be tested in this experiment are Water, Ethanol, and HFE7000. With these fluid's contrasting properties we should obtain great insight into what properties are most desired for this form of cooling. The second method of removing heat will be by pool boiling. For these tests will have a similar copper coupon, but in this case the fluid is allowed to gather in a pool completely submersing the copper coupon. We will be testing the fluids listed above plus some additional nanofluids. This is a very simple form of boiling that yields great amounts of heat transfer. Pool boiling as well as impingement boiling both have a very positive outlook for the future of liquid cooling and I hope to offer more insight though my research