keyword
MENU ▼
Read by QxMD icon Read
search

Heuristic

keyword
https://www.readbyqxmd.com/read/27911096/evaluating-health-advice-in-a-web-2-0-environment-the-impact-of-multiple-user-generated-factors-on-hiv-advice-perceptions
#1
Joseph B Walther, Jeong-Woo Jang, Ashley A Hanna Edwards
Unlike traditional media, social media systems often present information of different types from different kinds of contributors within a single message pane, a juxtaposition of potential influences that challenges traditional health communication processing. One type of social media system, question-and-answer advice systems, provides peers' answers to health-related questions, which yet other peers read and rate. Responses may appear good or bad, responders may claim expertise, and others' aggregated evaluations of an answer's usefulness may affect readers' judgments...
December 2, 2016: Health Communication
https://www.readbyqxmd.com/read/27910848/a-grand-unified-model-for-liganded-gold-clusters
#2
Wen Wu Xu, Beien Zhu, Xiao Cheng Zeng, Yi Gao
A grand unified model (GUM) is developed to achieve fundamental understanding of rich structures of all 71 liganded gold clusters reported to date. Inspired by the quark model by which composite particles (for example, protons and neutrons) are formed by combining three quarks (or flavours), here gold atoms are assigned three 'flavours' (namely, bottom, middle and top) to represent three possible valence states. The 'composite particles' in GUM are categorized into two groups: variants of triangular elementary block Au3(2e) and tetrahedral elementary block Au4(2e), all satisfying the duet rule (2e) of the valence shell, akin to the octet rule in general chemistry...
December 2, 2016: Nature Communications
https://www.readbyqxmd.com/read/27907161/barriers-and-facilitators-to-safe-food-handling-among-consumers-a-systematic-review-and-thematic-synthesis-of-qualitative-research-studies
#3
Ian Young, Lisa Waddell
Foodborne illness has a substantial health and economic burden on society, and most cases are believed to be due to unsafe food handling practices at home. Several qualitative research studies have been conducted to investigate consumers' perspectives, opinions, and experiences with safe food handling at home, and these studies provide insights into the underlying barriers and facilitators affecting their safe food handling behaviours. We conducted a systematic review of previously published qualitative studies in this area to synthesize the main across-study themes and to develop recommendations for future consumer interventions and research...
2016: PloS One
https://www.readbyqxmd.com/read/27905976/comparative-approaches-for-assessing-access-to-alcohol-outlets-exploring-the-utility-of-a-gravity-potential-approach
#4
Tony H Grubesic, Ran Wei, Alan T Murray, William Alex Pridemore
BACKGROUND: A growing body of research recommends controlling alcohol availability to reduce harm. Various common approaches, however, provide dramatically different pictures of the physical availability of alcohol. This limits our understanding of the distribution of alcohol access, the causes and consequences of this distribution, and how best to reduce harm. The aim of this study is to introduce both a gravity potential measure of access to alcohol outlets, comparing its strengths and weaknesses to other popular approaches, and an empirically-derived taxonomy of neighborhoods based on the type of alcohol access they exhibit...
August 2, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27902707/an-economic-geography-of-the-united-states-from-commutes-to-megaregions
#5
Garrett Dash Nelson, Alasdair Rae
The emergence in the United States of large-scale "megaregions" centered on major metropolitan areas is a phenomenon often taken for granted in both scholarly studies and popular accounts of contemporary economic geography. This paper uses a data set of more than 4,000,000 commuter flows as the basis for an empirical approach to the identification of such megaregions. We compare a method which uses a visual heuristic for understanding areal aggregation to a method which uses a computational partitioning algorithm, and we reflect upon the strengths and limitations of both...
2016: PloS One
https://www.readbyqxmd.com/read/27901606/protein-folding-prediction-in-a-cubic-lattice-in-hydrophobic-polar-model
#6
Nicola Yanev, Metodi Traykov, Peter Milanov, Borislav Yurukov
The tertiary structure of the proteins determines their functions. Therefore, the predicting of protein's tertiary structure, based on the primary amino acid sequence from long time, is the most important and challenging subject in biochemistry, molecular biology, and biophysics. One of the most popular protein structure prediction methods, called Hydrophobic-Polar (HP) model, is based on the observation that in polar environment hydrophobic amino acids are in the core of the molecule-in contact between them and more polar amino acids are in contact with the polar environment...
November 30, 2016: Journal of Computational Biology: a Journal of Computational Molecular Cell Biology
https://www.readbyqxmd.com/read/27897223/fast-and-simple-decycling-and-dismantling-of-networks
#7
Lenka Zdeborov√°, Pan Zhang, Hai-Jun Zhou
Decycling and dismantling of complex networks are underlying many important applications in network science. Recently these two closely related problems were tackled by several heuristic algorithms, simple and considerably sub-optimal, on the one hand, and involved and accurate message-passing ones that evaluate single-node marginal probabilities, on the other hand. In this paper we propose a simple and extremely fast algorithm, CoreHD, which recursively removes nodes of the highest degree from the 2-core of the network...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27896740/metabolic-pathway-mining
#8
Jan M Czarnecki, Adrian J Shepherd
Understanding metabolic pathways is one of the most important fields in bioscience in the post-genomic era, but curating metabolic pathways requires considerable man-power. As such there is a lack of reliable, experimentally verified metabolic pathways in databases and databases are forced to predict all but the most immediately useful pathways.Text-mining has the potential to solve this problem, but while sophisticated text-mining methods have been developed to assist the curation of many types of biomedical networks, such as protein-protein interaction networks, the mining of metabolic pathways from the literature has been largely neglected by the text-mining community...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27894702/adaptive-pi-controller-to-voltage-regulation-in-power-systems-statcom-as-a-case-study
#9
Mohammad Reza Tavana, Mohammad-Hassan Khooban, Taher Niknam
Static synchronous compensator (STATCOM) provides the means to improve quality and reliability of a power system as it has the functional capability to handle dynamic disturbances, such as transient stability and power oscillation damping as well as to providing voltage regulation. In this paper, a robust adaptive PI-based optimal fuzzy control strategy is proposed to control a STATCOM used in distribution systems. The proposed intelligent strategy is based on a combination of a new General Type-II Fuzzy Logic (GT2FL) with a simple heuristic algorithm named Teaching Learning Based Optimization (TLBO) Algorithm...
November 25, 2016: ISA Transactions
https://www.readbyqxmd.com/read/27893845/meta-heuristics-in-short-scale-construction-ant-colony-optimization-and-genetic-algorithm
#10
Ulrich Schroeders, Oliver Wilhelm, Gabriel Olaru
The advent of large-scale assessment, but also the more frequent use of longitudinal and multivariate approaches to measurement in psychological, educational, and sociological research, caused an increased demand for psychometrically sound short scales. Shortening scales economizes on valuable administration time, but might result in inadequate measures because reducing an item set could: a) change the internal structure of the measure, b) result in poorer reliability and measurement precision, c) deliver measures that cannot effectively discriminate between persons on the intended ability spectrum, and d) reduce test-criterion relations...
2016: PloS One
https://www.readbyqxmd.com/read/27893383/efficient-globally-optimal-consensus-maximisation-with-tree-search
#11
Tat-Jun Chin, Pulak Purkait, Anders Eriksson, David Suter
Maximum consensus is one of the most popular criteria for robust estimation in computer vision. Despite its widespread use, optimising the criterion is still customarily done by randomised sample-and-test techniques, which do not guarantee optimality of the result. Several globally optimal algorithms exist, but they are too slow to challenge the dominance of randomised methods. Our work aims to change this state of affairs by proposing an efficient algorithm for global maximisation of consensus. Under the framework of LP-type methods, we show how consensus maximisation for a wide variety of vision tasks can be posed as a tree search problem...
November 23, 2016: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/27893373/robust-color-guided-depth-map-restoration
#12
Wei Liu, Xiaogang Chen, Jie Yang, Qiang Wu
One of the most challenging issues in color guided depth map restoration is the inconsistency between color edges in guidance color images and depth discontinuities on depth maps. This makes the restored depth map suffer from texture copy artifacts and blurring depth discontinuities. To handle this problem, most state-of-the-art methods design complex guidance weight based on guidance color images and heuristically make use of the bicubic interpolation of the input depth map. In this paper, we show that using bicubic interpolated depth map can blur depth discontinuities when the upsampling factor is large and the input depth map contains large holes and heavy noise...
January 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/27893278/expected-fitness-gains-of-randomized-search-heuristics-for-the-traveling-salesperson-problem
#13
Samadhi Nallaperuma, Frank Neumann, Dirk Sudholt
Randomized search heuristics are frequently applied to NP-hard combinatorial optimization problems. The runtime analysis of randomized search heuristics has contributed tremendously to their theoretical understanding. Recently, randomized search heuristics have been examined regarding their achievable progress within a fixed time budget. We follow this approach and present a fixed budget analysis for an NP-hard combinatorial optimization problem. We consider the well-known Traveling Salesperson problem (TSP) and analyze the fitness increase that randomized search heuristics are able to achieve within a given fixed time budget...
November 28, 2016: Evolutionary Computation
https://www.readbyqxmd.com/read/27891146/a-self-organizing-incremental-spatiotemporal-associative-memory-networks-model-for-problems-with-hidden-state
#14
Zuo-Wei Wang
Identifying the hidden state is important for solving problems with hidden state. We prove any deterministic partially observable Markov decision processes (POMDP) can be represented by a minimal, looping hidden state transition model and propose a heuristic state transition model constructing algorithm. A new spatiotemporal associative memory network (STAMN) is proposed to realize the minimal, looping hidden state transition model. STAMN utilizes the neuroactivity decay to realize the short-term memory, connection weights between different nodes to represent long-term memory, presynaptic potentials, and synchronized activation mechanism to complete identifying and recalling simultaneously...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/27887990/the-new-approach-of-multiple-genome-sequence-parallel-matching-based-on-gpu
#15
Sha Ding, Shi-Yuan Zhao, Gang Liao, Tao Lin
Suffix trees and suffix arrays have recently received broad attention and use in bioinformatics applications, in particular for the use of DNA sequence alignments at the early matching phrase of heuristic algorithms. This research comes up with the implementation as well as optimization of suffix tree and suffix array on many-core and multi-core platforms for accelerating multiple genome sequence searching. In comparison to the traditional approaches, a binary searching with tile optimization and coalesced memory access under the GPU architecture is conducted in an effective fashion...
November 11, 2016: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/27886053/automated-urban-travel-interpretation-a-bottom-up-approach-for-trajectory-segmentation
#16
Rahul Deb Das, Stephan Winter
Understanding travel behavior is critical for an effective urban planning as well as for enabling various context-aware service provisions to support mobility as a service (MaaS). Both applications rely on the sensor traces generated by travellers' smartphones. These traces can be used to interpret travel modes, both for generating automated travel diaries as well as for real-time travel mode detection. Current approaches segment a trajectory by certain criteria, e.g., drop in speed. However, these criteria are heuristic, and, thus, existing approaches are subjective and involve significant vagueness and uncertainty in activity transitions in space and time...
November 23, 2016: Sensors
https://www.readbyqxmd.com/read/27884867/narrative-medicine-and-death-in-the-icu-word-clouds-as-a-visual-legacy
#17
Meredith Vanstone, Feli Toledo, France Clarke, Anne Boyle, Mita Giacomini, Marilyn Swinton, Lois Saunders, Melissa Shears, Nicole Zytaruk, Anne Woods, Trudy Rose, Tracey Hand-Breckenridge, Diane Heels-Ansdell, Shelley Anderson-White, Robert Sheppard, Deborah Cook
OBJECTIVE: The Word Cloud is a frequent wish in the 3 Wishes Project developed to nurture peace and ease the grieving process for dying critically ill patients. The objective was to examine whether Word Clouds can act as a heuristic approach to encourage a narrative orientation to medicine. Narrative medicine is an approach which can strengthen relationships, compassion and resilience. DESIGN: Word Clouds were created for 42 dying patients, and we interviewed 37 family members and 73 clinicians about their impact...
November 24, 2016: BMJ Supportive & Palliative Care
https://www.readbyqxmd.com/read/27883049/mqc-a-heuristic-quality-control-metric-for-high-throughput-drug-combination-screening
#18
Lu Chen, Kelli Wilson, Ian Goldlust, Bryan T Mott, Richard Eastman, Mindy I Davis, Xiaohu Zhang, Crystal McKnight, Carleen Klumpp-Thomas, Paul Shinn, John Simmons, Mike Gormally, Sam Michael, Craig J Thomas, Marc Ferrer, Rajarshi Guha
Quality control (QC) metrics are critical in high throughput screening (HTS) platforms to ensure reliability and confidence in assay data and downstream analyses. Most reported HTS QC metrics are designed for plate level or single well level analysis. With the advent of high throughput combination screening there is a need for QC metrics that quantify the quality of combination response matrices. We introduce a predictive, interpretable, matrix-level QC metric, mQC, based on a mix of data-derived and heuristic features...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27881126/initial-evaluation-of-prospective-cardiac-triggering-using-photoplethysmography-signals-recorded-with-a-video-camera-compared-to-pulse-oximetry-and-electrocardiography-at-7t-mri
#19
Nicolai Spicher, Markus Kukuk, Stefan Maderwald, Mark E Ladd
BACKGROUND: Accurate synchronization between magnetic resonance imaging data acquisition and a subject's cardiac activity ("triggering") is essential for reducing image artifacts but conventional, contact-based methods for this task are limited by several factors, including preparation time, patient inconvenience, and susceptibility to signal degradation. The purpose of this work is to evaluate the performance of a new contact-free triggering method developed with the aim to eventually replace conventional methods in non-cardiac imaging applications...
November 24, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27877103/neural-underpinnings-of-decision-strategy-selection-a-review-and-a-theoretical-model
#20
Szymon Wichary, Tomasz Smolen
In multi-attribute choice, decision makers use decision strategies to arrive at the final choice. What are the neural mechanisms underlying decision strategy selection? The first goal of this paper is to provide a literature review on the neural underpinnings and cognitive models of decision strategy selection and thus set the stage for a neurocognitive model of this process. The second goal is to outline such a unifying, mechanistic model that can explain the impact of noncognitive factors (e.g., affect, stress) on strategy selection...
2016: Frontiers in Neuroscience
keyword
keyword
53733
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"