7,996 research outputs found
Hudson River-Black River Regulating District and CSEA Local 120, Hudson-Black River District
In the matter of the fact-finding between the Hudson River-Black River Regulating District, employer, and the CSEA Local 120, Hudson-Black River District, union. PERB case no. M2013-168. Before: Robert G. Bentley, fact finder
Ground truth data from Arizona and Montana test sites
There are no author-identified significant results in this report
FORCES RESHAPING AGRICULTURAL RESEARCH AND EDUCATIONAL INSTITUTIONS
Research and Development/Tech Change/Emerging Technologies,
Usefulness of ERTS-1 satellite imagery as a data-gathering tool by resource managers in the Bureau of Land Management
ERTS-1 satellite imagery can be an effective data-gathering tool for resource managers. Techniques are developed which allow managers to visually analyze simulated color infrared composite images to map perennial and ephemeral (annual) plant communities. Tentative results indicate that ephemeral plant growth and development and potential to produce forage can be monitored
An experimental investigation of drop deformation and breakup in steady, two-dimensional linear flows
We consider the deformation and burst of small fluid droplets in steady linear, two-dimensional motions of a second immiscible fluid. Experiments using a computer-controlled, four-roll mill to investigate the effect of flow type are described, and the results compared with predictions of several available asymptotic deformation and burst theories, as well as numerical calculations. The comparison clarifies the range of validity of the theories, and demonstrates that they provide quite adequate predictions over a wide range of viscosity ratio, capillary number, and flow type
A computer-controlled four-roll mill for investigations of particle and drop dynamics in two-dimensional linear shear flows
In this paper we describe the design and operating characteristics of a computer-controlled four-roll mill for investigations of particle and drop dynamics in two-dimensional linear flows. The control system is based upon the use of: a video camera to visualize the instantaneous position of the drop or particle; a PDP 11/23 computer, with a pipeline processor acting as an interface between the camera and computer, to calculate the position and implement a control strategy, and d.c. stepping motors to convert an electronic signal to angular velocities of the four rollers. The control objective is to keep the centre of mass of the drop/particle at the centre of the region between the rollers where there is a stagnation point in the undisturbed flow, while maintaining the shear-rate and the ratio of vorticity to strain rate in the flow at fixed values. The resulting system is suitable for studies of: the rotational motions of single solid particles; the deformation and burst of single droplets; or the hydrodynamic interactions of two particles or drops, one of which is held with its centre-of-mass fixed at the stagnation point of the undisturbed flow. In all cases, the flow can be varied from pure rotation to pure strain, and the shear rate can be either steady or changing as a prescribed function of time
Written evidence to the House of Commons Business and Skills Committee (ed) Local enterprise partnerships and the Regional Growth Fund
The Business, Innovation and Skills Committee announced an inquiry looking into the Local Enterprise Partnerships and the Regional Growth Fund. In particular, the Committee examined how the proposed new structures would work, alongside issues such as distribution of funding, value for money, accountability, timing, transitional arrangements and required legislation. A Report on the Local Enterprise Partnerships was published on 26 April 2013
Multibody Multipole Methods
A three-body potential function can account for interactions among triples of
particles which are uncaptured by pairwise interaction functions such as
Coulombic or Lennard-Jones potentials. Likewise, a multibody potential of order
can account for interactions among -tuples of particles uncaptured by
interaction functions of lower orders. To date, the computation of multibody
potential functions for a large number of particles has not been possible due
to its scaling cost. In this paper we describe a fast tree-code for
efficiently approximating multibody potentials that can be factorized as
products of functions of pairwise distances. For the first time, we show how to
derive a Barnes-Hut type algorithm for handling interactions among more than
two particles. Our algorithm uses two approximation schemes: 1) a deterministic
series expansion-based method; 2) a Monte Carlo-based approximation based on
the central limit theorem. Our approach guarantees a user-specified bound on
the absolute or relative error in the computed potential with an asymptotic
probability guarantee. We provide speedup results on a three-body dispersion
potential, the Axilrod-Teller potential.Comment: To appear in Journal of Computational Physic
An Investigation of the Physical Education Specialist in the Elementary School
Acting on the premise that the physical education program is a vital part of the elementary school curriculum, every elementary school should provide qualified leadership, proper facilities, and activities suited to the growth and development of the participants
Student Speech in Public Schools: A Comprehensive Analytical Framework Based on the Role of Public Schools in Democratic Education
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