228 research outputs found
Algorithms for Coloring Quadtrees
We describe simple linear time algorithms for coloring the squares of
balanced and unbalanced quadtrees so that no two adjacent squares are given the
same color. If squares sharing sides are defined as adjacent, we color balanced
quadtrees with three colors, and unbalanced quadtrees with four colors; these
results are both tight, as some quadtrees require this many colors. If squares
sharing corners are defined as adjacent, we color balanced or unbalanced
quadtrees with six colors; for some quadtrees, at least five colors are
required.Comment: 7 pages, 9 figure
Faculty Artist Recital
Kennesaw State University School of Music presents: Faculty Artist Recitalhttps://digitalcommons.kennesaw.edu/musicprograms/1590/thumbnail.jp
Particle formation and interaction
A wide variety of experiments can be conducted on the Space Station that involve the physics of small particles of planetary significance. Processes of interest include nucleation and condensation of particles from a gas, aggregation of small particles into larger ones, and low velocity collisions of particles. All of these processes could be investigated with a general purpose facility on the Space Station. The microgravity environment would be necessary to perform many experiments, as they generally require that particles be suspended for periods substantially longer than are practical at 1 g. Only experiments relevant to planetary processes will be discussed in detail here, but it is important to stress that a particle facility will be useful to a wide variety of scientific disciplines, and can be used to address many scientific problems
Towards a Practical Behavior Analytic Multitiered Consultation Model for Early Childhood Educators
Early childhood educators are in a critical position to support young childrenās social-emotional, behavioral, and learning development, which can be accomplished through consistent use of evidence-based practices delivered in day-to-day interactions. However, early childhood educators may require support for implementing evidence-based practices. The purpose of this paper is to introduce a novel form of behavioral consultation for early childhood educators. Specifically, a behavior analytic multitiered consultation model in which implementation supports become increasingly more intensive is described. Rationale, implementation, evidence-base, and implications for practice and research are described. Finally, this paper concludes with an empirical case study to illustrate this modelās implementation. This paper is also meant to serve as a call-to-action for researchers and practitioners to replicate this consultation model
AmiGO: online access to ontology and annotation data
AmiGO is a web application that allows users to query, browse and visualize ontologies and related gene product annotation (association) data. AmiGO can be used online at the Gene Ontology (GO) website to access the data provided by the GO Consortium1; it can also be downloaded and installed to browse local ontologies and annotations.2 AmiGO is free open source software developed and maintained by the GO Consortium
Engaging Students With Course Content Using Scheduled and Unscheduled Emails and Text Messages
This study addressed college studentsā acceptance of push communication (i.e., email and SMS messaging) as a means of receiving course-related content, and modified the Unified Theory of Acceptance and Use of Technology by including Scheduled Message as an independent variable. Surveys of 301 studentsā perceptions of instructor-sent email and SMS texts directing them to materials in six instructorsā 10 courses were analyzed by PLS-PM for their impact on the studentsā intention to use these push communication technologies. In contrast to previous studies on technology acceptance, we evaluated actual usage patterns for both the scheduled and unscheduled push communication. Scheduled emails did not yield higher average duration times or unique visitors than unscheduled ones, yet click-through rates and return visits were higher. Scheduled SMS messages did yield higher average duration times, unique visitors, and click-through rates than unscheduled SMS messages, yet unscheduled SMS messages yielded more return visits. We argue that the differences in the results for email vs. SMS may have been due to emailās slower delivery time. We also consider implications for faculty wishing to facilitate distributed learning among students via push communication
Engaging Students With Course Content Using Scheduled and Unscheduled Emails and Text Messages
This study addressed college studentsā acceptance of push communication (i.e., email and SMS messaging) as a means of receiving course-related content, and modified the Unified Theory of Acceptance and Use of Technology by including Scheduled Message as an independent variable. Surveys of 301 studentsā perceptions of instructor-sent email and SMS texts directing them to materials in six instructorsā 10 courses were analyzed by PLS-PM for their impact on the studentsā intention to use these push communication technologies. In contrast to previous studies on technology acceptance, we evaluated actual usage patterns for both the scheduled and unscheduled push communication. Scheduled emails did not yield higher average duration times or unique visitors than unscheduled ones, yet click-through rates and return visits were higher. Scheduled SMS messages did yield higher average duration times, unique visitors, and click-through rates than unscheduled SMS messages, yet unscheduled SMS messages yielded more return visits. We argue that the differences in the results for email vs. SMS may have been due to emailās slower delivery time. We also consider implications for faculty wishing to facilitate distributed learning among students via push communication
Two Candidate High-Redshift X-ray Jets Without Coincident Radio Jets
We report the detection of extended X-ray emission from two high-redshift
radio quasars. These quasars, J1405+0415 at =3.208 and J1610+1811 at
=3.118, were observed in a Chandra snapshot survey selected from a complete
sample of the radio-brightest quasars in the overlap area of the VLA-FIRST
radio survey and the Sloan Digital Sky Survey. The extended X-ray emission is
located along the line connecting the core to a radio knot or hotspot, favoring
the interpretation of X-ray jets. The inferred rest frame jet X-ray
luminosities from 2--30 keV would be of order 10 erg~s if emitted
isotropically and without relativistic beaming. In the scenario of inverse
Compton scattering of the cosmic microwave background (CMB), X-ray jets without
a coincident radio counterpart may be common, and should be readily detectable
to redshifts even beyond 3.2 due to the (1+) increase of the CMB energy
density compensating for the (1+) cosmological diminution of surface
brightness. If these can be X-ray confirmed, they would be the second and third
examples of quasar X-ray jets without detection of underlying continuous radio
jets.Comment: 10 pages, 4 figures. Accepted for publication in The Astrophysical
Journa
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