1,156 research outputs found
The Triangle Operator
We examine the averaging operator corresponding to the manifold in
of pairs of points satisfying , so that is the set of vertices of an equilateral triangle. We
establish boundedness for for in the convex hull of the set of points , where .Comment: 15 pages, discussion on the maximal variant expande
Self alignment techniques for strapdown inertial navigation systems with aircraft application
Self alignment techniques for strapdown inertial navigation systems for commercial aircraf
Trunk muscle activity during drop jump performance in adolescent athletes with back pain
It was with great interest we read the recently published article “Trunk Muscle Activity during Drop Jump Performance in Adolescent Athletes with Back Pain.” Investigating back pain (BP) in adolescents is commendable as there is growing evidence that for many, an experience of BP as early as 14 years of age may relate to ongoing pain in adulthood (Coenen et al., 2017). Indeed, the conventional narrative is changing as individual physical factors such as posture, use of schoolbags, and hypermobility are only weakly associated with adolescent BP. Rather, factors which predict BP at a young age are considered to be multi-dimensional and include gender, negative BP beliefs and poor mental health (O\u27Sullivan et al., 2017; Smith et al., 2017). Mueller et al. (2017) have focused on a single physical factor (trunk muscle activation patterns) drawing inferences regarding BP prevention and treatment. This article prompts consideration of three essential aspects regarding research design and interpretation of findings:
1. Interpreting results from cross-sectional designs
2. Interpreting pain-related differences in motor behavior
3. Translating and conveying scientific results to the end-user (patients, healthcare professionals and policy makers)
Consistent and High Rates of Gene Transfer Can Be Obtained Using Flow-Through Transduction over a Wide Range of Retroviral Titers
Overview summary Flow-through transduction provides a means by which high rates of gene transfer can occur without using high titers of virus vector. Reproducibly high numbers of transduced cells can be obtained with a wide range of virus titers, thus relaxing the requirement of set (high) titers within a transduction protocol. Incorporating flow-through transductions within clinical applications of gene therapy may also obviate the need for large volumes of high-titer virus produced by vector producer cell line cultures.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/63214/1/hum.1996.7.6-743.pd
Structural Kinetic Modeling of Metabolic Networks
To develop and investigate detailed mathematical models of cellular metabolic
processes is one of the primary challenges in systems biology. However, despite
considerable advance in the topological analysis of metabolic networks,
explicit kinetic modeling based on differential equations is still often
severely hampered by inadequate knowledge of the enzyme-kinetic rate laws and
their associated parameter values. Here we propose a method that aims to give a
detailed and quantitative account of the dynamical capabilities of metabolic
systems, without requiring any explicit information about the particular
functional form of the rate equations. Our approach is based on constructing a
local linear model at each point in parameter space, such that each element of
the model is either directly experimentally accessible, or amenable to a
straightforward biochemical interpretation. This ensemble of local linear
models, encompassing all possible explicit kinetic models, then allows for a
systematic statistical exploration of the comprehensive parameter space. The
method is applied to two paradigmatic examples: The glycolytic pathway of yeast
and a realistic-scale representation of the photosynthetic Calvin cycle.Comment: 14 pages, 8 figures (color
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