1,521 research outputs found
“This Erstwhile Unreadable Text”: Deep Time, Multidisciplinarity and First-Year Writing Faculty Mentoring and Support
Despite the otherwise rich multidisciplinary terrain of writing studies, the strategies most often used with first-year writing teacher teaching mentoring and support tend to remain discordantly anchored to a comparatively narrow version of writing pedagogy. I argue in this article that the geologic concept of deep time offers a way of infusing a multidisciplinary dimension into first-year writing faculty teaching mentoring and support that will enrich the ways faculty and students think, write, and talk about first-year writing. This article discusses deep-time pedagogy, providing specific strategies for infusing multidisciplinary dimensions into first-year writing faculty teaching mentoring and support. Such a move is vital across nearly all contexts of first-year writing, not only where first-year writing has overtly multidisciplinary features (as in my program), but also where first-year writing programs are housed in English departments
Performance comparison of point and spatial access methods
In the past few years a large number of multidimensional point access methods, also called
multiattribute index structures, has been suggested, all of them claiming good performance. Since no
performance comparison of these structures under arbitrary (strongly correlated nonuniform, short
"ugly") data distributions and under various types of queries has been performed, database
researchers and designers were hesitant to use any of these new point access methods. As shown in
a recent paper, such point access methods are not only important in traditional database applications.
In new applications such as CAD/CIM and geographic or environmental information systems, access
methods for spatial objects are needed. As recently shown such access methods are based on point
access methods in terms of functionality and performance. Our performance comparison naturally
consists of two parts. In part I we w i l l compare multidimensional point access methods, whereas in
part I I spatial access methods for rectangles will be compared. In part I we present a survey and
classification of existing point access methods. Then we carefully select the following four methods
for implementation and performance comparison under seven different data files (distributions) and
various types of queries: the 2-level grid file, the BANG file, the hB-tree and a new scheme, called
the BUDDY hash tree. We were surprised to see one method to be the clear winner which was the
BUDDY hash tree. It exhibits an at least 20 % better average performance than its competitors and is
robust under ugly data and queries. In part I I we compare spatial access methods for rectangles.
After presenting a survey and classification of existing spatial access methods we carefully selected
the following four methods for implementation and performance comparison under six different data
files (distributions) and various types of queries: the R-tree, the BANG file, PLOP hashing and the
BUDDY hash tree. The result presented two winners: the BANG file and the BUDDY hash tree.
This comparison is a first step towards a standardized testbed or benchmark. We offer our data and
query files to each designer of a new point or spatial access method such that he can run his
implementation in our testbed
3+1 Approach to the Long Wavelength Iteration Scheme
Large-scale inhomogeneities and anisotropies are modeled using the Long
Wavelength Iteration Scheme. In this scheme solutions are obtained as
expansions in spatial gradients, which are taken to be small. It is shown that
the choice of foliation for spacetime can make the iteration scheme more
effective in two respects: (i) the shift vector can be chosen so as to dilute
the effect of anisotropy on the late-time value of the extrinsic curvature of
the spacelike hypersurfaces of the foliation; and (ii) pure gauge solutions
present in a similar calculation using the synchronous gauge vanish when the
spacelike hypersurfaces have extrinsic curvature with constant trace. We
furthermore verify the main conclusion of the synchronous gauge calculation
which is large-scale inhomogeneity decays if the matter--considered to be that
of a perfect-fluid with a barotropic equation of state--violates the
strong-energy condition. Finally, we obtain the solution for the lapse function
and discuss its late-time behaviour. It is found that the lapse function is
well-behaved when the matter violates the strong energy condition.Comment: 21 pages, TeX file, already publishe
Recommended from our members
Semantic effects in sentence recall: The contribution of immediate vs delayed recall in language assessment
Sentence recall is increasingly used to assess language. It is widely debated what the task is actually testing, but one rarely explored aspect is the contribution of semantics to sentence recall. The few studies that have examined the role of semantics in sentence recall have employed an 'intrusion paradigm', following Potter and Lombardi (1990), and their paradigm relies on interference errors with conclusions based on an analysis of error patterns. We have instead manipulated the semantic plausibility of whole sentences to investigate the effects of semantics on immediate and delayed sentence recall. In Study 1, adults recalled semantically plausible and implausible sentences either immediately or after distracter tasks varying in lexical retrieval demands (backward counting and picture naming). Results revealed significant effects of plausibility, delay, and a significant interaction indicating increasing reliance on semantics as the demands of the distracter tasks increased. Study 2, conducted with 6-year-old children, employed delay conditions that were modified to avoid floor effects (delay with silence and forward counting) and a similar pattern of results emerged. This novel methodology provided robust evidence showing the effectiveness of delayed recall in the assessment of semantics and the effectiveness of immediate recall in the assessment of morphosyntax. The findings from our study clarify the linguistic mechanisms involved in immediate and delayed sentence recall, with implications for the use of recall tasks in language assessment.
Learning outcomes: The reader will be able to: (i) understand the difference between immediate and delayed sentence recall and different types of distractors, (ii) understand the utility of immediate and delayed recall sentence recall in language assessment, (iii) discuss suitability of delayed recall for the assessment of semantics
Recommended from our members
The Role of Expectation and Memory in the Hindsight Bias Effect: A Test of Cognitive Reconstruction Models
(First Paragraph) The Hindsight Bias Effect (HBE) describes the observation that once people are aware of an outcome to a situation, they have a tendency to falsely believe that they would have predicted the true outcome (see Guibault et al., 2004) Historically, the most popular explanations for this effect can be described as Cognitive Reconstruction Models of retrospective judgment formation (Hawkins & Hastie, 1990). These theories propose the hindsight bias occurs when people do not or cannot directly recall their initial judgment at the point of retrospection. Therefore, people attempt to reconstruct their original predictive judgment by re-judging the situation anew. All of these theories propose that the knowledge of the outcome somehow affects the information or cues used in this reconstruction process, thereby leading to retrospective judgments that are more in favor of the given outcome. However, these Cognitive Reconstruction theories all propose different mechanisms for reconstruction which lead to diverging predictions about what variables should moderate the HBE
A Survey of Selected Attendance Problems in the Toppenish Junior High School
The field of attendance is very broad in scope. This is not a study of a single problem. The main part of the research deals with the relationship between absences and grades, and the question frequently comes up, “Are absences the cause of poor grades, or are poor grades the cause of absences?
An investigation into sonography student experiences of simulation teaching and learning in the acquisition of clinical skills
©, 2014, SAGE Publications Ltd. All rights reserved. Technological developments are impacting on many aspects of life, including education. One particular area of technology where there is growing interest within higher education institutions (HEIs) offering healthcare training is the use of simulators. The literature shows diverging views on the role of simulated learning in healthcare and further evaluation is needed to explore the quality of learning opportunities that are offered, and their effectiveness in the preparation of students for clinical practice. A qualitative study was undertaken, using interviews to explore the experiences of a group of sonography students after interacting with an ultrasound simulator. Simulation was positively evaluated by students inthis study. The findings confirm that simulated learning enables students to be interactive learners rather than beingpassive recipients of knowledge. Simulated learning provides learning opportunities in a risk free environment, which reduces stress for the student and potential harm to patients. Confidence levels were increased, thereby improving futureclinical scanning experiences for both the student and their patients. Suggestions were made for the more effectiveintegration of simulated learning into the curriculum. Continued research into simulation, teaching and learning practices needs to occur if we are to ensure maximum advantage of the simulation experience
The dynamics of dissipative multi-fluid neutron star cores
We present a Newtonian multi-fluid formalism for superfluid neutron star
cores, focussing on the additional dissipative terms that arise when one takes
into account the individual dynamical degrees of freedom associated with the
coupled "fluids". The problem is of direct astrophysical interest as the nature
of the dissipative terms can have significant impact on the damping of the
various oscillation modes of the star and the associated gravitational-wave
signatures. A particularly interesting application concerns the
gravitational-wave driven instability of f- and r-modes. We apply the developed
formalism to two specific three-fluid systems: (i) a hyperon core in which both
Lambda and Sigma^- hyperons are present, and (ii) a core of deconfined quarks
in the colour-flavour-locked phase in which a population of neutral K^0 kaons
is present. The formalism is, however, general and can be applied to other
problems in neutron-star dynamics (such as the effect of thermal excitations
close to the superfluid transition temperature) as well as laboratory
multi-fluid systems.Comment: RevTex, no figure
Long-wavelength iteration scheme and scalar-tensor gravity
Inhomogeneous and anisotropic cosmologies are modeled withing the framework
of scalar-tensor gravity theories. The inhomogeneities are calculated to
third-order in the so-called long-wavelength iteration scheme. We write the
solutions for general scalar coupling and discuss what happens to the
third-order terms when the scalar-tensor solution approaches at first-order the
general relativistic one. We work out in some detail the case of Brans-Dicke
coupling and determine the conditions for which the anisotropy and
inhomogeneity decay as time increases. The matter is taken to be that of
perfect fluid with a barotropic equation of state.Comment: 13 pages, requires REVTeX, submitted to Phys. Rev.
- …