keyword
MENU ▼
Read by QxMD icon Read
search

dynamic index

keyword
https://www.readbyqxmd.com/read/28822018/the-prevalence-of-growth-hormone-deficiency-in-survivors-of-subarachnoid-haemorrhage-results-from-a-large-single-centre-study
#1
Sumithra Giritharan, Joanna Cox, Calvin J Heal, David Hughes, Kanna Gnanalingham, Tara Kearney
OBJECTIVE: The variation in reported prevalence of growth hormone deficiency (GHD) post subarachnoid haemorrhage (SAH) is mainly due to methodological heterogeneity. We report on the prevalence of GHD in a large cohort of patients following SAH, when dynamic and confirmatory pituitary hormone testing methods are systematically employed. DESIGN: In this cross-sectional study, pituitary function was assessed in 100 patients following SAH. Baseline pituitary hormonal profile measurement and glucagon stimulation testing (GST) was carried out in all patients...
August 18, 2017: Pituitary
https://www.readbyqxmd.com/read/28819173/disentangling-the-coupling-between-sea-ice-and-tundra-productivity-in-svalbard
#2
Marc Macias-Fauria, Stein Rune Karlsen, Bruce C Forbes
The rapid decline in Arctic sea ice poses urgent questions concerning its ecological effects, such as on tundra terrestrial productivity. However, reported sea ice/terrestrial productivity linkages have seldom been constrained, and the mechanism governing them remains elusive, with a diversity of spatial scales and metrics proposed, at times in contradiction to each other. In this study, we use spatially explicit remotely sensed sea ice concentration and high-resolution terrestrial productivity estimates (Normalised Difference Vegetation Index, NDVI) across the Svalbard Archipelago to describe local/sub-regional and large-scale components of sea ice/terrestrial productivity coupling...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28817976/an-open-source-model-and-solution-method-to-predict-co-contraction-in-the-finger
#3
Alexander R MacIntosh, Peter J Keir
A novel open-source biomechanical model of the index finger with an electromyography (EMG)-constrained static optimization solution method are developed with the goal of improving co-contraction estimates and providing means to assess tendon tension distribution through the finger. The Intrinsic model has four degrees of freedom and seven muscles (with a 14 component extensor mechanism). A novel plugin developed for the OpenSim modelling software applied the EMG-constrained static optimization solution method...
August 17, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28817708/timing-and-extent-of-finger-force-enslaving-during-a-dynamic-force-task-cannot-be-explained-by-emg-activity-patterns
#4
Mojtaba Mirakhorlo, Huub Maas, DirkJan H E J Veeger
Finger enslaving is defined as the inability of the fingers to move or to produce force independently. Such finger enslaving has predominantly been investigated for isometric force tasks. The aim of this study was to assess whether the extent of force enslaving is dependent on relative finger movements. Ten right-handed subjects (22-30 years) flexed the index finger while counteracting constant resistance forces (4, 6 and 8 N) orthogonal to the fingertip. The other, non-instructed fingers were held in extension...
2017: PloS One
https://www.readbyqxmd.com/read/28817662/single-scan-rest-stress-imaging-with-99mtc-sestamibi-and-cadmium-zinc-telluride-based-spect-for-hyperemic-flow-quantification-a-feasibility-study-evaluated-with-cardiac-magnetic-resonance-imaging
#5
Yu-Hua Dean Fang, Yuan-Chang Liu, Kung-Chu Ho, Feng-Cheng Kuo, Ching-Fang Yang, Tzu-Chen Yen, I-Chang Hsieh
INTRODUCTION: We aimed to evaluate whether the hyperemic myocardial blood flow (MBF) can be estimated using cadmium zinc telluride (CZT)-based single-photon emission computed tomography (SPECT) cameras with a single, rapid rest/stress dynamic scan. Dynamic contrast-enhanced (DCE) cardiac magnetic resonance imaging (MRI) was used as a reference modality for flow measurement. MATERIALS AND METHODS: The proposed protocol included both the rest and stress acquisitions within a 24-min scan...
2017: PloS One
https://www.readbyqxmd.com/read/28817158/characteristics-and-efficacy-of-a-new-3-dimensional-printed-mesh-structure-titanium-alloy-spacer-for-posterior-lumbar-interbody-fusion
#6
Sung-Soo Chung, Kyung-Joon Lee, Yoo-Beom Kwon, Kyung-Chung Kang
This study evaluated the characteristics of a newly developed 3-dimensional printed mesh structure titanium spacer and its efficacy for posterior lumbar interbody fusion. Posterior lumbar interbody fusion with this spacer was performed at 53 segments (40 patients; mean age, 64 years; range, 51-73 years). Data were collected prospectively. Radiographic characteristics were analyzed with changes in interbody height, instability of the segments, formation of bone bridges around the implants, and pseudarthrosis, as determined by dynamic radiographs and postoperative computed tomography scans...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28815634/effect-of-trapping-methods-on-the-estimation-of-alpha-diversity-of-a-phlebotomine-sandfly-assemblage-in-southern-mexico
#7
J J Rodríguez-Rojas, E A Rebollar-Téllez
The aims of the study were to (a) investigate the effect of trapping methods on alpha diversity; and (b) enhance the knowledge of the sandfly assemblage in the state of Quintana Roo. Field work was undertaken in a tropical forest of southern Mexico from August 2013 to July 2014. Sampling was conducted monthly during three consecutive nights. For each trapping night, 12 different types of trap were operated from 18.00 to 24.00 hours in four transects. Measures of alpha community diversity were based on the quantification of the number of species (Chao 2, Jackknife 2, Clench's equation, Margalef's index) and the community structure, as well as the dominance (Simpson and Berger-Parker indexes) and evenness (Shannon's entropy index, true diversity of the Jost and Pielou index)...
August 17, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28814785/comparison-between-spectral-analysis-and-symbolic-dynamics-for-heart-rate-variability-analysis-in-the-rat
#8
Luiz Eduardo Virgilio Silva, Victor Rezende Geraldini, Bianca Potratz de Oliveira, Carlos Alberto Aguiar Silva, Alberto Porta, Rubens Fazan
Spectral analysis of heart rate (HR) has been widely used to assess the autonomic cardiovascular control. A nonlinear approach, known as symbolic analysis, has been reported to be very useful to assess the autonomic control of cardiovascular system in humans, but very few studies reported on the differences between these two approaches on experimental models. Two distinct approaches were used to elicit autonomic changes in conscious Wistar rats: (1) pharmacological blockade of cardiac autonomic receptors with atenolol (ATE, N = 9) or methylatropine (ATR, N = 9) and (2) mild changes in arterial pressure (AP) induced by phenylephrine (PHE, N = 9) or sodium nitroprusside (NPS, N = 9)...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814394/dynamics-of-intrapericardial-and-extrapericardial-fat-tissues-during-long-term-dietary-induced-moderate-weight-loss
#9
Gal Tsaban, Arik Wolak, Hila Avni-Hassid, Yftach Gepner, Ilan Shelef, Yaakov Henkin, Dan Schwarzfuchs, Noa Cohen, Nitzan Bril, Michal Rein, Dana Serfaty, Shira Kenigsbuch, Lilac Tene, Hila Zelicha, Anat Yaskolka-Meir, Oded Komy, Avital Bilitzky, Yoash Chassidim, Uta Ceglarek, Michael Stumvoll, Matthias Blüher, Joachim Thiery, Dror Dicker, Assaf Rudich, Meir J Stampfer, Iris Shai
Background: In view of evidence linking pericardial fat accumulation with increased cardiovascular disease risk, strategies to reduce its burden are needed. Data comparing the effects of specific long-term dietary interventions on pericardial fat tissue mobilization are sparse.Objective: We sought to evaluate intrapericardial-fat (IPF) and extrapericardial-fat (EPF) changes during weight-loss interventions by different dietary regimens.Design: During 18 mo of a randomized controlled trial, we compared a Mediterranean/low-carbohydrate (MED/LC) diet plus 28 g walnuts/d with a calorically equal low-fat (LF) diet among randomly assigned participants with moderate abdominal obesity...
August 16, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28814339/social-disparities-in-body-mass-index-bmi-trajectories-among-chinese-adults-in-1991-2011
#10
Changchun Fang, Ying Liang
BACKGROUND: Obesity is a serious public health problem in China. The relationship between obesity and socio-economic status (SES) is changing and affected by uncertainty, particularly, in developing countries. The sex-related differences in body mass index (BMI) trajectories are controversial and require substantial empirical data for updating and enriching. METHODS: This study examined the relationship between SES and BMI in Chinese adults from a dynamic perspective using longitudinal data (1991-2011) from the China Health and Nutrition Survey (CHNS)...
August 16, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28813929/soft-brain-machine-interfaces-for-assistive-robotics-a-novel-control-approach
#11
Lucia Schiatti, Jacopo Tessadori, Giacinto Barresi, Leonardo S Mattos, Arash Ajoudani
Robotic systems offer the possibility of improving the life quality of people with severe motor disabilities, enhancing the individual's degree of independence and interaction with the external environment. In this direction, the operator's residual functions must be exploited for the control of the robot movements and the underlying dynamic interaction through intuitive and effective human-robot interfaces. Towards this end, this work aims at exploring the potential of a novel Soft Brain-Machine Interface (BMI), suitable for dynamic execution of remote manipulation tasks for a wide range of patients...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813532/nitrogen-and-carbon-isotopic-dynamics-of-subarctic-soils-and-plants-in-southern-yukon-territory-and-its-implications-for-paleoecological-and-paleodietary-studies
#12
Farnoush Tahmasebi, Fred J Longstaffe, Grant Zazula, Bruce Bennett
We examine here the carbon and nitrogen isotopic compositions of bulk soils (8 topsoil and 7 subsoils, including two soil profiles) and five different plant parts of 79 C3 plants from two main functional groups: herbs and shrubs/subshrubs, from 18 different locations in grasslands of southern Yukon Territory, Canada (eastern shoreline of Kluane Lake and Whitehorse area). The Kluane Lake region in particular has been identified previously as an analogue for Late Pleistocene eastern Beringia. All topsoils have higher average total nitrogen δ15N and organic carbon δ13C than plants from the same sites with a positive shift occurring with depth in two soil profiles analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28811600/exploring-leishmania-secretory-proteins-to-design-b-and-t-cell-multi-epitope-subunit-vaccine-using-immunoinformatics-approach
#13
Nazia Khatoon, Rajan Kumar Pandey, Vijay Kumar Prajapati
Visceral leishmaniasis (VL) is a fatal form of leishmaniasis which affects 70 countries, worldwide. Increasing drug resistance, HIV co-infection, and poor health system require operative vaccination strategy to control the VL transmission dynamics. Therefore, a holistic approach is needed to generate T and B memory cells to mediate long-term immunity against VL infection. Consequently, immunoinformatics approach was applied to design Leishmania secretory protein based multi-epitope subunit vaccine construct consisting of B and T cell epitopes...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28809960/metrics-for-comparing-neuronal-tree-shapes-based-on-persistent-homology
#14
Yanjie Li, Dingkang Wang, Giorgio A Ascoli, Partha Mitra, Yusu Wang
As more and more neuroanatomical data are made available through efforts such as NeuroMorpho.Org and FlyCircuit.org, the need to develop computational tools to facilitate automatic knowledge discovery from such large datasets becomes more urgent. One fundamental question is how best to compare neuron structures, for instance to organize and classify large collection of neurons. We aim to develop a flexible yet powerful framework to support comparison and classification of large collection of neuron structures efficiently...
2017: PloS One
https://www.readbyqxmd.com/read/28809894/high-sensitivity-and-large-dynamic-range-refractive-index-sensors-employing-weak-composite-fabry-perot-cavities
#15
Pengcheng Chen, Xuewen Shu, Haoran Cao, Kate Sugden
Most sensors face a common trade-off between high sensitivity and a large dynamic range. We demonstrate here an all-fiber refractometer based on a dual-cavity Fabry-Perot interferometer (FPI) that possesses the advantage of both high sensitivity and a large dynamic range. Since the two composite cavities have a large cavity length difference, one can observe both fine and coarse fringes, which correspond to the long cavity and the short cavity, respectively. The short-cavity FPI and the use of an intensity demodulation method mean that the individual fine fringe dips correspond to a series of quasi-continuous highly sensitive zones for refractive index measurement...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28808939/comparison-of-left-ventricular-shape-by-gated-spect-imaging-in-diabetic-and-nondiabetic-patients-with-normal-myocardial-perfusion-a-propensity-score-analysis
#16
Carmela Nappi, Valeria Gaudieri, Wanda Acampa, Roberta Assante, Emilia Zampella, Ciro Gabriele Mainolfi, Mario Petretta, Guido Germano, Alberto Cuocolo
BACKGROUND: Diabetes mellitus induces structural and functional cardiac alterations that can result in heart failure. Left ventricular (LV) shape is a dynamic component of cardiac geometry influencing its contractile function. However, few data are available comparing LV shape index in diabetic and nondiabetic patients without overt coronary artery disease after balancing for coronary risk factors. METHODS: We studied 1168 patients with normal myocardial perfusion and normal LV ejection fraction on stress gated single-photon emission computed tomography (SPECT) imaging...
August 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28808023/prefrontal-cortex-modulates-posterior-alpha-oscillations-during-top-down-guided-visual-perception
#17
Randolph F Helfrich, Melody Huang, Guy Wilson, Robert T Knight
Conscious visual perception is proposed to arise from the selective synchronization of functionally specialized but widely distributed cortical areas. It has been suggested that different frequency bands index distinct canonical computations. Here, we probed visual perception on a fine-grained temporal scale to study the oscillatory dynamics supporting prefrontal-dependent sensory processing. We tested whether a predictive context that was embedded in a rapid visual stream modulated the perception of a subsequent near-threshold target...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807742/a-cost-utility-analysis-of-dynesys-dynamic-stabilization-versus-instrumented-fusion-for-the-treatment-of-degenerative-lumbar-spine-diseases
#18
Kan Liu, Wei Sun, Qiang Lu, Jiying Chen, Jiaguang Tang
BACKGROUND: Symptomatic chronic low back and leg pain resulting from lumbar spine degenerative disorders is highly prevalent in China, and for some patients, surgery is the final option for improvement. Several techniques for spinal non-fusion have been introduced to reduce the side-effects of fusion methods and hasten postoperative recovery. In this study, the authors have evaluated the cost-effectiveness of Dynesys posterior dynamic stabilization system (DY) compared with lumbar fusion techniques in the treatment of single-level degenerative lumbar spinal conditions...
August 11, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28806649/firm-performance-and-the-role-of-environmental-management
#19
Tommy Lundgren, Wenchao Zhou
This paper analyzes the interactions between three dimensions of firm performance - productivity, energy efficiency, and environmental performance - and especially sheds light on the role of environmental management. In this context, environmental management is investments to reduce environmental impact, which may also affect firm competitiveness, in terms of change in productivity, and spur more (or less) efficient use of energy. We apply data envelopment analysis (DEA) technique to calculate the Malmquist firm performance indexes, and a panel vector auto-regression (VAR) methodology is utilized to investigate the dynamic and causal relationship between the three dimensions of firm performance and environmental investment...
August 11, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28806624/bcl-2-bax-protein-and-mrna-expression-in-yak-bos-grunniens-placentomes
#20
JiangFeng Fan, SiJiu Yu, Yan Cui, Gengquan Xu, Libin Wang, Yangyang Pan, Honghong He
Placental function is complex and influenced by various factors; furthermore, it depends on a delicate balance between cell proliferation, cell differentiation, and cell death. Bcl-2 and Bax proteins are key apoptosis regulators and are considered to play an important role in the maintenance of both dynamic balance and integrity of many tissues. Changes in Bcl-2 and Bax expressions have been described during different developmental stages in normal human placentas. Studies furthermore indicated several pathological placental changes to be related to abnormal Bcl-2 and Bax expressions...
July 29, 2017: Theriogenology
keyword
keyword
103147
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"