196,726 research outputs found
Decentralised Coordination of Low-Power Embedded Devices Using the Max-Sum Algorithm
No full textThis paper considers the problem of performing decentralised coordination of low-power embedded devices (as is required within many environmental sensing and surveillance applications). Specifically, we address the generic problem of maximising social welfare within a group of interacting agents. We propose a novel representation of the problem, as a cyclic bipartite factor graph, composed of variable and function nodes (representing the agents’ states and utilities respectively). We show that such representation allows us to use an extension of the max-sum algorithm to generate approximate solutions to this global optimisation problem through local decentralised message passing. We empirically evaluate this approach on a canonical coordination problem (graph colouring), and benchmark it against state of the art approximate and complete algorithms (DSA and DPOP). We show that our approach is robust to lossy communication, that it generates solutions closer to those of DPOP than DSA is able to, and that it does so with a communication cost (in terms of total messages size) that scales very well with the number of agents in the system (compared to the exponential increase of DPOP). Finally, we describe a hardware implementation of our algorithm operating on low-power Chipcon CC2431 System-on-Chip sensor nodes
Optimized Ventriculo-Arterial Optimized Ventriculo-Arterial Interaction Explains Better Longitudinal Function in Endurance-Trained Athletes by Comparison with Strength-Trained Athletes
No full textnot availabl
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Better longitudinal function in endurance-trained athletes in comparison with strength-trained athletes, related to optimized ventriculo-arterial interaction.
No full textDispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
"Supranormal" Cardiac Function in Athletes Related to Better Arterial and Endothelial Function
No full textObjective: Athlete’s heart is associated with left ventricular (LV) hypertrophy (LVH), and “supranormal”
cardiac function, suggesting that this is a physiological process. Hypertrophy alone cannot explain
increase in cardiac function, therefore, other mechanisms, such as better ventriculo-arterial coupling
might be involved. Methods: We studied 60 male (21 ± 3 years) subjects: 27 endurance athletes,
and a control group of 33 age-matched sedentary subjects. We assessed global systolic and diastolic LV
function, short- and long-axismyocardial velocities, arterial structure and function and ventriculo-arterial
coupling, endothelial function by flow-mediated dilatation, and amino-terminal pro-brain natriuretic
peptide (NT-proBNP) and biological markers of myocardial fibrosis and of oxidative stress. Results:
Athletes had “supranormal” LV longitudinal function (12.4 ± 1.0 vs 10.1 ± 1.4 cm/s for longitudinal
systolic velocity, and 17.4 ± 2.6 vs 15.1 ± 2.4 cm/s for longitudinal early diastolic velocity, both P <
0.01), whereas ejection fraction and short-axis function were similar to controls. Meanwhile, they had
better endothelial function (16.7 ± 7.0 vs 13.3 ± 5.3%, P < 0.05) and lower arterial stiffness (pulse
wave velocity 7.1 ± 0.6 vs 8.8 ± 1.1 m/s, P = 0.0001), related to lower oxidative stress (0.259 ± 0.71
vs 0.428 ± 0.88 nmol/mL, P = 0.0001), with improved ventriculo-arterial coupling (37.1 ± 21.5 vs
15.5 ± 13.4 mmHg.m/s3 × 103, P = 0.0001). NT-proBNP and markers of myocardial fibrosis were not
different from controls. LV longitudinal function was directly related to ventriculo-arterial coupling, and
inversely related to arterial stiffness and to oxidative stress. Conclusions: “Supranormal” cardiac function
in athletes is due to better endothelial and arterial function, related to lower oxidative stress, with
optimized ventriculo-arterial coupling; athlete’s heart is purely a physiological phenomenon, associated
with “supranormal” cardiac function, and there are nomarkers of myocardial fibrosis
Collagen-Coated Hyperelastic Bone Promotes Osteoblast Adhesion and Proliferation
No full textSuccessfully reconstructing bone and restoring its dynamic function represents a significant challenge for medicine. Critical size defects (CSDs), resulting from trauma, tumor removal, or degenerative conditions, do not naturally heal and often require complex bone grafting. However, these grafts carry risks, such as tissue rejection, infections, and surgical site damage, necessitating the development of alternative treatments. Three-dimensional and four-dimensional printed synthetic biomaterials represent a viable alternative, as they carry low production costs and are highly reproducible. Hyperelastic bone (HB), a biocompatible synthetic polymer consisting of 90% hydroxyapatite and 10% poly(lactic-co-glycolic acid, PLGA), was examined for its potential to support cell adhesion, migration, and proliferation. Specifically, we seeded collagen-coated HB with MG-63 human osteosarcoma cells. Our analysis revealed robust cell adhesion and proliferation over 7 days in vitro, with cells forming uniform monolayers on the external surface of the scaffold. However, no cells were present on the core of the fibers. The cells expressed bone differentiation markers on days 3 and 5. By day 7, the scaffold began to degrade, developing microscopic fissures and fragmentation. In summary, collagen-coated HB scaffolds support cell adhesion and proliferation but exhibit reduced structural support after 7 days in culture. Nevertheless, the intricate 3D architecture holds promise for cellular migration, vascularization, and early osteogenesis
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