8,291 research outputs found
Do We Want to Measure the Quality of Care for Vulnerable Older People? The ACOVE Approach. Syracuse Seminar on Aging.
There's limited information available about measuring the quality of medical care that is targeted to the needs of older patients. And there's very limited pressure on the system to provide high quality geriatric care. Why is that? Because the quality measures haven't been adequately developed and implemented, and it's more difficult to measure care for an older sample. Measuring care for ill older adults is complex, because they tend to have multiple medical conditions, and they demonstrate substantial variation in goals for care (Wenger and colleagues 2007). The Assessing Care of Vulnerable Elders (ACOVE) project began in 1998 as a collaboration between RAND Health and Pzizer Inc to develop and apply quality indicators (QIs) for assessment and treatment targeted at vulnerable older persons. The project involved defining and identifying the target population, identifying health conditions that cover much of the medical care provided to this population, developing quality-of-care indicators to measure how well those conditions are being addressed, and applying thoseindicators to determine the actual quality of care received by older adults.health care, medical care, elderly, assessment, geriatrics, gerontology
Saturation numbers in tripartite graphs
Given graphs and , a subgraph is an -saturated
subgraph of if , but for all . The saturation number of in , denoted
, is the minimum number of edges in an -saturated subgraph
of . In this paper we study saturation numbers of tripartite graphs in
tripartite graphs. For and , , and sufficiently
large, we determine and
exactly and
within an additive constant.
We also include general constructions of -saturated subgraphs of
with few edges for .Comment: 18 pages, 6 figure
Planar digraphs without large acyclic sets
Given a directed graph, an acyclic set is a set of vertices inducing a
subgraph with no directed cycle. In this note we show that there exist oriented
planar graphs of order for which the size of the maximum acyclic set is at
most , for any . This disproves a conjecture of
Harutyunyan and shows that a question of Albertson is best possible.Comment: 3 pages, 1 figur
Graph Saturation in Multipartite Graphs
Let be a fixed graph and let be a family of graphs. A
subgraph of is -saturated if no member of
is a subgraph of , but for any edge in , some element of
is a subgraph of . We let and
denote the maximum and minimum size of an
-saturated subgraph of , respectively. If no element of
is a subgraph of , then .
In this paper, for and we determine
, where is the complete balanced -partite
graph with partite sets of size . We also give several families of
constructions of -saturated subgraphs of for . Our results
and constructions provide an informative contrast to recent results on the
edge-density version of from [A. Bondy, J. Shen, S.
Thomass\'e, and C. Thomassen, Density conditions for triangles in multipartite
graphs, Combinatorica 26 (2006), 121--131] and [F. Pfender, Complete subgraphs
in multipartite graphs, Combinatorica 32 (2012), no. 4, 483--495].Comment: 16 pages, 4 figure
Kinematic Analysis and Trajectory Planning of the Orthoglide 5-axis
The subject of this paper is about the kinematic analysis and the trajectory
planning of the Orthoglide 5-axis. The Orthoglide 5-axis a five degrees of
freedom parallel kinematic machine developed at IRCCyN and is made up of a
hybrid architecture, namely, a three degrees of freedom translational parallel
manip-ulator mounted in series with a two degrees of freedom parallel spherical
wrist. The simpler the kinematic modeling of the Or-thoglide 5-axis, the higher
the maximum frequency of its control loop. Indeed, the control loop of a
parallel kinematic machine should be computed with a high frequency, i.e.,
higher than 1.5 MHz, in order the manipulator to be able to reach high speed
motions with a good accuracy. Accordingly, the direct and inverse kinematic
models of the Orthoglide 5-axis, its inverse kine-matic Jacobian matrix and the
first derivative of the latter with respect to time are expressed in this
paper. It appears that the kinematic model of the manipulator under study can
be written in a quadratic form due to the hybrid architecture of the Orthoglide
5-axis. As illustrative examples, the profiles of the actuated joint angles
(lengths), velocities and accelerations that are used in the control loop of
the robot are traced for two test trajectories.Comment: Appears in International Design Engineering Technical Conferences \&
Computers and Information in Engineering Conference, Aug 2015, Boston, United
States. 201
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