keyword
MENU ▼
Read by QxMD icon Read
search

Trade-off

keyword
https://www.readbyqxmd.com/read/28335415/time-modulated-arrays-from-their-origin-to-their-utilization-in-wireless-communication-systems
#1
REVIEW
Roberto Maneiro-Catoira, Julio Brégains, José A García-Naya, Luis Castedo
Time-modulated arrays (TMAs) are electromagnetic systems whose radiated power pattern is controlled by the application of variable-width periodical pulses to the individual elements. The nonlinear nature of the array operation causes the appearance of radiation patterns at the harmonic frequencies of such periodic pulses. The technique can be used for improving the side-lobe level (SLL) topology of the radiation pattern at the central frequency and/or to profitably exploit the harmonic patterns in order to supply smart antenna capabilities...
March 14, 2017: Sensors
https://www.readbyqxmd.com/read/28335096/estimation-of-methane-emissions-from-local-and-crossbreed-beef-cattle-in-dak-lak-province-of-vietnam
#2
Carlos Alberto Ramírez-Restrepo, Dung Van Tien, Ngoan Le Duc, Mario Herrero, Phung Le Dinh, Dung Dinh Van, Sen Le Thi Hoa, Cuong Vu Chi, Cesar Solano-Patiño, Amy M Lerner, Timothy D Searchinger
Objective: This study was aimed at evaluating effects of cattle breed resources and alternative mixed-feeding practices on meat productivity and emission intensities from household farming systems in Daklak Province, Vietnam. Methods: Records from Local Yellow x Red Sindhi (Bos indicus; Lai Sind) and ½ Limousin, ½ Drought Master and ½ Red Angus cattle during the growth (0 to 21 months) and fattening (22 to 25 months) periods were used to better understand variations on meat productivity and enteric methane emissions...
March 21, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28334174/dna-damage-response-in-hematopoietic-stem-cells-an-evolutionary-trade-off-between-blood-regeneration-and-leukemia-suppression
#3
Shahar Biechonski, Muhammad Yassin, Michael Milyavsky
Self-renewing and multipotent hematopoietic stem cells (HSCs) maintain lifelong hematopoiesis. Their enormous regenerative potential coupled with lifetime persistence in the body, in contrast with the Progenitors, demand tight control of HSCs genome stability. Indeed, failure to accurately repair DNA damage in HSCs is associated with bone marrow failure and accelerated leukemogenesis. Recent observations exposed remarkable differences in several DNA-damage response (DDR) aspects between HSCs and Progenitors, especially in their DNA-repair capacities and susceptibility to apoptosis...
March 15, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28334046/enhancing-sampling-design-in-mist-net-bat-surveys-by-accounting-for-sample-size-optimization
#4
Leonardo Carreira Trevelin, Roberto Leonan Morim Novaes, Paul François Colas-Rosas, Thayse Cristhina Melo Benathar, Carlos A Peres
The advantages of mist-netting, the main technique used in Neotropical bat community studies to date, include logistical implementation, standardization and sampling representativeness. Nonetheless, study designs still have to deal with issues of detectability related to how different species behave and use the environment. Yet there is considerable sampling heterogeneity across available studies in the literature. Here, we approach the problem of sample size optimization. We evaluated the common sense hypothesis that the first six hours comprise the period of peak night activity for several species, thereby resulting in a representative sample for the whole night...
2017: PloS One
https://www.readbyqxmd.com/read/28333067/optimal-waste-load-allocation-using-graph-model-for-conflict-resolution
#5
Leila Saberi, Mohammad Hossein Niksokhan
In this paper, a new methodology is proposed for waste load allocation in river systems using the decision support system (DSS) for the graph model for conflict resolution II (GMCRII), multi-criteria decision making (MCDM) analysis and the Multi-Objective Particle Swarm Optimization (MOPSO) algorithm. Minimization of total treatment and penalty costs and minimization of biological oxygen demand violation of standards at the check point are considered as the main objectives of this study. At first, the water quality along the river was simulated using the Streeter-Phelps (S-P) equation coupled with the MOPSO model...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28332465/the-challenge-of-middle-income-countries-to-development-assistance-for-health-recipients-funders-both-or-neither
#6
Trygve Ottersen, Suerie Moon, John-Arne Røttingen
Recent developments have transformed the role and characteristics of middle-income countries (MICs). Many stakeholders now question the appropriate role of MICs in the system of development assistance for health (DAH), and key funders have already recast their approach to these countries. The pressing question is whether MICs should be recipients, funders, both or neither. The answer has deep implications for individual countries and their citizens, and for the DAH system as a whole. We clarify the fundamental issues involved and emphasise a special feature of many MICs: mid-level gross national income per capita (GNIpc) combined with substantial health needs and large inequalities...
April 2017: Health Economics, Policy, and Law
https://www.readbyqxmd.com/read/28331636/patient-experiences-of-decentralized-hiv-treatment-and-care-in-plateau-state-north-central-nigeria-a-qualitative-study
#7
Grace O Kolawole, Hannah N Gilbert, Nancin Y Dadem, Becky L Genberg, Patricia A Agaba, Prosper Okonkwo, Oche O Agbaji, Norma C Ware
Background. Decentralization of care and treatment for HIV infection in Africa makes services available in local health facilities. Decentralization has been associated with improved retention and comparable or superior treatment outcomes, but patient experiences are not well understood. Methods. We conducted a qualitative study of patient experiences in decentralized HIV care in Plateau State, north central Nigeria. Five decentralized care sites in the Plateau State Decentralization Initiative were purposefully selected...
2017: AIDS Research and Treatment
https://www.readbyqxmd.com/read/28331582/lifetime-fitness-consequences-of-early-life-ecological-hardship-in-a-wild-mammal-population
#8
Harry H Marshall, Emma I K Vitikainen, Francis Mwanguhya, Robert Businge, Solomon Kyabulima, Michelle C Hares, Emma Inzani, Gladys Kalema-Zikusoka, Kenneth Mwesige, Hazel J Nichols, Jennifer L Sanderson, Faye J Thompson, Michael A Cant
Early-life ecological conditions have major effects on survival and reproduction. Numerous studies in wild systems show fitness benefits of good quality early-life ecological conditions ("silver-spoon" effects). Recently, however, some studies have reported that poor-quality early-life ecological conditions are associated with later-life fitness advantages and that the effect of early-life conditions can be sex-specific. Furthermore, few studies have investigated the effect of the variability of early-life ecological conditions on later-life fitness...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28329874/long-term-health-related-quality-of-life-outcomes-in-digital-replantation-versus-revision-amputation
#9
Oren Tessler, Matthew J Bartow, Marie P Tremblay-Champagne, Alex M Lin, Geneviève Landes, Sarah Sebbag, Andreas Nikolis
Background Earlier, digit viability judged the success of digital replantation. Now, utility health-related quality of life (HRQOL) measures can better assess the impact of digital replantation. Methods Overall, 264 digital injury patients were sent a regimen of utility measures: Disabilities of the Arm, Shoulder and Hand (DASH) score, European Quality of Life 5 Dimensions, visual analog scale (VAS), time trade-off (TTO), and standard gamble (SG). Overall, 51 patients responded completely to all of these-36 replantation patients and 15 revision amputation patients...
March 22, 2017: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/28329703/successful-and-maladaptive-t-cell-aging
#10
REVIEW
Jörg J Goronzy, Cornelia M Weyand
Throughout life, the T cell system adapts to shifting resources and demands, resulting in a fundamentally restructured immune system in older individuals. Here we review the cellular and molecular features of an aged immune system and discuss the trade-offs inherent to these adaptive mechanisms. Processes include homeostatic proliferation that maintains compartment size at the expense of partial loss in stemness and incomplete differentiation and the activation of negative regulatory programs, which constrain effector T cell expansion and prevent increasing oligoclonality but also interfere with memory cell generation...
March 21, 2017: Immunity
https://www.readbyqxmd.com/read/28328784/direct-xa-inhibitors-in-addition-to-antiplatelet-therapy-in-acute-coronary-syndrome-meta-analysis-of-randomized-trials
#11
Pedro A Villablanca, David Holmes, Divyanshu Mohananey, David F Briceno, Ivan J Núñez Gil, Faraj Kargoli, Tanush Gupta, Jorge R Kizer, Anna E Bortnick, Jose Wiley, Mark A Menegus, Robert Pyo, Mario García, Harish Ramakrishna, Farouk Mookadam
OBJECTIVE: We carried out a meta-analysis summarizing the efficacy and safety of direct factor Xa inhibitor (DXI) in patients receiving guideline-based antiplatelet therapy (GBAT) after an acute coronary syndrome. BACKGROUND: Randomized-controlled trials have shown that the addition of a DXI to GBAT after acute coronary syndrome can reduce ischemic events, the trade-off being an increase in major bleeding complications. METHODS: PubMed, Central, Embase, The Cochrane Register, Google Scholar databases, and the scientific session abstracts were searched for eligible randomized trials from 1 January 1990 through 31 December 2016...
March 21, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28327636/high-throughput-amplicon-sequencing-and-stream-benthic-bacteria-identifying-the-best-taxonomic-level-for-multiple-stressor-research
#12
R K Salis, A Bruder, J J Piggott, T C Summerfield, C D Matthaei
Disentangling the individual and interactive effects of multiple stressors on microbial communities is a key challenge to our understanding and management of ecosystems. Advances in molecular techniques allow studying microbial communities in situ and with high taxonomic resolution. However, the taxonomic level which provides the best trade-off between our ability to detect multiple-stressor effects versus the goal of studying entire communities remains unknown. We used outdoor mesocosms simulating small streams to investigate the effects of four agricultural stressors (nutrient enrichment, the nitrification inhibitor dicyandiamide (DCD), fine sediment and flow velocity reduction) on stream bacteria (phyla, orders, genera, and species represented by Operational Taxonomic Units with 97% sequence similarity)...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327527/emerging-interaction-patterns-in-the-emiliania-huxleyi-ehv-system
#13
Eliana Ruiz, Monique Oosterhof, Ruth-Anne Sandaa, Aud Larsen, António Pagarete
Viruses are thought to be fundamental in driving microbial diversity in the oceanic planktonic realm. That role and associated emerging infection patterns remain particularly elusive for eukaryotic phytoplankton and their viruses. Here we used a vast number of strains from the model system Emiliania huxleyi/Emiliania huxleyi Virus to quantify parameters such as growth rate (µ), resistance (R), and viral production (Vp) capacities. Algal and viral abundances were monitored by flow cytometry during 72-h incubation experiments...
March 22, 2017: Viruses
https://www.readbyqxmd.com/read/28327379/computer-tablet-or-telephone-a-randomised-controlled-trial-exploring-two-methods-of-collecting-data-from-drug-and-alcohol-outpatients
#14
Breanne Hobden, Jamie Bryant, Mariko Carey, Rob Sanson-Fisher, Christopher Oldmeadow
OBJECTIVE: Both computerised and telephone surveys have potential advantages for research data collection. The current study aimed to determine the: (i) feasibility, (ii) acceptability, and (iii) cost per completed survey of computer tablet versus telephone data collection for clients attending an outpatient drug and alcohol treatment clinic. DESIGN: Two-arm randomised controlled trial. METHOD: Clients attending a drug and alcohol outpatient clinic in New South Wales, Australia, were randomised to complete a baseline survey via computer tablet in the clinic or via telephone interview within two weeks of their appointment...
March 10, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28327229/explanations-for-attractiveness-related-positive-biases-in-an-evolutionary-perspective-of-life-history-theory
#15
Bin-Bin Chen
The mating-related evolutionary explanation that Maestripieri et al. offer does not apply to (1) infants' positive biases toward attractive individuals and (2) adults' positive biases toward attractive infants and children. They are best understood when integrated into an evolutionary life history framework. I argue that the life history of positive biases toward attractive individuals is driven by fundamental trade-offs made throughout development.
January 2017: Behavioral and Brain Sciences
https://www.readbyqxmd.com/read/28325942/comparative-genomics-reveals-contraction-in-olfactory-receptor-genes-in-bats
#16
Georgia Tsagkogeorga, Steven Müller, Christophe Dessimoz, Stephen J Rossiter
Gene loss and gain during genome evolution are thought to play important roles in adaptive phenotypic diversification. Among mammals, bats possess the smallest genomes and have evolved the unique abilities of powered flight and laryngeal echolocation. To investigate whether gene family evolution has contributed to the genome downsizing and phenotypic diversification in this group, we performed comparative evolutionary analyses of complete proteome data for eight bat species, including echolocating and non-echolocating forms, together with the proteomes of 12 other laurasiatherian mammals...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28325437/a-new-survival-status-prediction-system-for-severe-trauma-patients-based-on-a-multiple-classifier-system
#17
José Sanz, Daniel Paternain, Mikel Galar, Javier Fernandez, Diego Reyero, Tomás Belzunegui
BACKGROUND AND OBJECTIVE: Severe trauma patients are those who have several injuries implying a death risk. Prediction systems consider the severity of these injuries to predict whether the patients are likely to survive or not. These systems allow one to objectively compare the quality of the emergency services of trauma centres across different hospitals. However, even the most accurate existing prediction systems are based on the usage of a single model. The aim of this paper is to combine several models to make the prediction, since this methodology usually improves the performance of single models...
April 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28324954/hardware-friendly-seizure-detection-with-a-boosted-ensemble-of-shallow-decision-trees
#18
Mahsa Shoaran, Masoud Farivar, Azita Emami
Efficient on-chip learning is becoming an essential element of implantable biomedical devices. Despite a substantial literature on automated seizure detection algorithms, hardware-friendly implementation of such techniques is not sufficiently addressed. In this paper, we propose to employ a gradientboosted ensemble of decision trees to achieve a reasonable trade-off between detection accuracy and implementation cost. Combined with the proposed feature extraction model, we show that these classifiers quickly become competitive with more complex learning models previously proposed for hardware implementation, with only a small number of low-depth (d <; 4) "shallow" trees...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324931/muscle-activity-distribution-features-extracted-from-hd-semg-to-perform-forearm-pattern-recognition
#19
F Nougarou, A Campeau-Lecours, D Massicotte, B Gosselin
An efficient pattern recognition system based exclusively on forearm surface Electromyographic (sEMG) signals is proposed to provide a more intuitive control of a robotic arm used by some of the disabled. The main contribution of this paper is the use of an original set of features characterizing the muscle activity distribution obtained with high-density sEMG (HD sEMG) sensors. Contrary to simple sEMG, HD sEMG can produce muscle activity images with spatial distributions that differ according to forearm movement...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28322874/reconstructing-the-genotype-to-fitness-map-for-the-bacterial-chemotaxis-network-and-its-emergent-behavioural-phenotypes
#20
Alberto Nakauma, G Sander van Doorn
The signal-transduction network responsible for chemotaxis in Escherichia coli has been characterised in extraordinary detail. Yet, relatively little is known about eco-evolutionary aspects of chemotaxis, such as how the network has been shaped by selection and to what extent natural populations may fine-tune their chemotactic behaviour to the ecological conditions. To address these questions, we here develop an evolutionary-systems-biology model of the chemotaxis network of E. coli, which we apply to estimate the resource accumulation rate (here used as a proxy for fitness) of wildtype and a large number of potential mutant genotypes...
March 18, 2017: Journal of Theoretical Biology
keyword
keyword
24666
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"