keyword
MENU ▼
Read by QxMD icon Read
search

Time series analysis

keyword
https://www.readbyqxmd.com/read/29161655/the-association-between-ambient-temperature-and-mortality-in-south-africa-a-time-series-analysis
#1
Noah Scovronick, Francesco Sera, Fiorella Acquaotta, Diego Garzena, Simona Fratianni, Caradee Y Wright, Antonio Gasparrini
BACKGROUND: There is an extensive literature describing temperature-mortality associations in developed regions, but research from developing countries, and Africa in particular, is limited. METHODS: We conducted a time-series analysis using daily temperature data and a national dataset of all 8.8 million recorded deaths in South Africa between 1997 and 2013. Mortality and temperature data were linked at the district municipality level and relationships were estimated with a distributed lag non-linear model with 21 days of lag, and pooled in a multivariate meta-analysis...
November 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/29161187/network-mapping-with-gimme
#2
Adriene M Beltz, Kathleen M Gates
Network science is booming! While the insights and images afforded by network mapping techniques are compelling, implementing the techniques is often daunting to researchers. Thus, the aim of this tutorial is to facilitate implementation in the context of GIMME, or group iterative multiple model estimation. GIMME is an automated network analysis approach for intensive longitudinal data. It creates person-specific networks that explain how variables are related in a system. The relations can signify current or future prediction that is common across people or applicable only to an individual...
November 2017: Multivariate Behavioral Research
https://www.readbyqxmd.com/read/29160610/do-pregnancy-characteristics-contribute-to-rising-childhood-cancer-incidence-rates-in-the-united-states
#3
Rebecca D Kehm, Theresa L Osypuk, Jenny N Poynter, David M Vock, Logan G Spector
BACKGROUND: Since 1975, childhood cancer incidence rates have gradually increased in the United States; however, few studies have conducted analyses across time to unpack this temporal rise. The aim of this study was to test the hypothesis that increasing cancer incidence rates are due to secular trends in pregnancy characteristics that are established risk factors for childhood cancer incidence including older maternal age, higher birthweight, and lower birth order. We also considered temporal trends in sociodemographic characteristics including race/ethnicity and poverty...
November 21, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29160088/resting-state-functional-connectivity-of-the-subthalamic-nucleus-to-limbic-associative-and-motor-networks
#4
Sheeba Arnold Anteraper, Xavier Guell, Susan Whitfield-Gabrieli, Christina Triantafyllou, Aaron Mattfeld, John D Gabrieli, Maiya Geddes
The subthalamic nucleus (STN) is a small structure situated deep in the mid-brain that exhibits wide-ranging functionality. In addition to its role in motor control, the STN is considered a hub for synchronizing aspects of emotion and cognition including attention, inhibitory control, motivation, and working memory. Evidence from neuroanatomical tracer studies suggests that the medial, ventromedial, and dorsolateral parts of the STN correspond to limbic, associative, and motor subdivisions respectively. While the extent of STN functional anatomical overlap remains unclear, BOLD imaging of the STN may provide complementary information about the diverse functions of this structure...
November 21, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/29159960/mapping-the-structural-and-functional-network-architecture-of-the-medial-temporal-lobe-using-7t-mri
#5
Preya Shah, Danielle S Bassett, Laura E M Wisse, John A Detre, Joel M Stein, Paul A Yushkevich, Russell T Shinohara, John B Pluta, Elijah Valenciano, Molly Daffner, David A Wolk, Mark A Elliott, Brian Litt, Kathryn A Davis, Sandhitsu R Das
Medial temporal lobe (MTL) subregions play integral roles in memory function and are differentially affected in various neurological and psychiatric disorders. The ability to structurally and functionally characterize these subregions may be important to understanding MTL physiology and diagnosing diseases involving the MTL. In this study, we characterized network architecture of the MTL in healthy subjects (n = 31) using both resting state functional MRI and MTL-focused T2-weighted structural MRI at 7 tesla...
November 20, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29159851/comparison-of-three-fixation-methods-in-treatment-of-tibial-fracture-in-adolescents
#6
REVIEW
Lixiang Lin, Yang Liu, Chuanlu Lin, Yifei Zhou, Yongzeng Feng, Xiaolong Shui, Kehe Yu, Xiaolang Lu, Jianjun Hong, Yang Yu
BACKGROUND: Tibial fractures are the most common musculoskeletal injury in adolescents. The optimal management of tibial fractures in adolescents is controversial. In this study, we compared the outcomes including complications of three fixation methods in tibial fractures of adolescents and explored the factors associated with the complications. METHODS: A retrospective cohort study about 83 diaphyseal tibial fractures in 79 children and adolescents, who were treated with plate fixation (PF), elastic stable intramedullary nail fixation (ESINF), or external fixation (EF), was conducted...
November 21, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29158531/non-criticality-of-interaction-network-over-system-s-crises-a-percolation-analysis
#7
Amir Hossein Shirazi, Abbas Ali Saberi, Ali Hosseiny, Ehsan Amirzadeh, Pourya Toranj Simin
Extraction of interaction networks from multi-variate time-series is one of the topics of broad interest in complex systems. Although this method has a wide range of applications, most of the previous analyses have focused on the pairwise relations. Here we establish the potential of such a method to elicit aggregated behavior of the system by making a connection with the concepts from percolation theory. We study the dynamical interaction networks of a financial market extracted from the correlation network of indices, and build a weighted network...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29158529/accurate-thermal-conductivities-from-optimally-short-molecular-dynamics-simulations
#8
Loris Ercole, Aris Marcolongo, Stefano Baroni
The evaluation of transport coefficients in extended systems, such as thermal conductivity or shear viscosity, is known to require impractically long simulations, thus calling for a paradigm shift that would allow to deploy state-of-the-art quantum simulation methods. We introduce a new method to compute these coefficients from optimally short molecular dynamics simulations, based on the Green-Kubo theory of linear response and the cepstral analysis of time series. Information from the full sample power spectrum of the relevant current for a single and relatively short trajectory is leveraged to evaluate and optimally reduce the noise affecting its zero-frequency value, whose expectation is proportional to the corresponding conductivity...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29158449/induced-hypertension-for-delayed-cerebral-ischemia-after-aneurysmal-subarachnoid-hemorrhage-a-randomized-clinical-trial
#9
Celine S Gathier, Walter M van den Bergh, Mathieu van der Jagt, Bon H Verweij, Jan Willem Dankbaar, Marcella C Müller, Annemarie W Oldenbeuving, Gabriel J E Rinkel, Arjen J C Slooter
BACKGROUND AND PURPOSE: Induced hypertension is widely used to treat delayed cerebral ischemia (DCI) after aneurysmal subarachnoid hemorrhage, but a literature review shows that its presumed effectiveness is based on uncontrolled case-series only. We here report clinical outcome of aneurysmal subarachnoid hemorrhage patients with DCI included in a randomized trial on the effectiveness of induced hypertension. METHODS: Aneurysmal subarachnoid hemorrhage patients with clinical symptoms of DCI were randomized to induced hypertension or no induced hypertension...
November 20, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29158202/dynamic-effective-connectivity-in-resting-state-fmri
#10
REVIEW
Hae-Jeong Park, Karl Friston, Chongwon Pae, Bumhee Park, Adeel Razi
Context-sensitive and activity-dependent fluctuations in connectivity underlie functional integration in the brain and have been studied widely in terms of synaptic plasticity, learning and condition-specific (e.g., attentional) modulations of synaptic efficacy. This dynamic aspect of brain connectivity has recently attracted a lot of attention in the resting state fMRI community. To explain dynamic functional connectivity in terms of directed effective connectivity among brain regions, we introduce a novel method to identify dynamic effective connectivity using spectral dynamic causal modelling (spDCM)...
November 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/29157834/16-hydroxycleroda-3-13-dien-15-16-olide-inhibits-the-proliferation-and-induces-mitochondrial-dependent-apoptosis-through-akt-mtor-and-mek-erk-pathways-in-human-renal-carcinoma-cells
#11
Cheng Liu, Wei-Chang Lee, Bu-Miin Huang, Yi-Chen Chia, Yu-Chi Chen, Yung-Chia Chen
BACKGROUND: Renal cell carcinoma (RCC) is well known that it cannot be treated with traditional chemotherapy or radiotherapy. 16-Hydroxycleroda-3,13-dien-15,16-olide (CD), isolated from Polyalthia longifolia Benth. & Hook. f. var. pendula had been reported to display significant efficacy against cancer cell lines. PURPOSE: To determine the anti-tumour activities of CD in two clear cell type RCC (ccRCC) cell lines (A-498 and 786-O). In addition, the underlying mechanisms were also examined...
December 1, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29157455/identification-of-preterm-birth-based-on-rqa-analysis-of-electrohysterograms
#12
Marta Borowska, Ewelina Brzozowska, Paweł Kuć, Edward Oczeretko, Romuald Mosdorf, Piotr Laudański
BACKGROUND AND OBJECTIVE: Common methods for data analysis are mainly based on linear concepts, but in recent years nonlinear dynamics methods have been introduced. It is a well-known fact that In typical biological systems lack of stationarity and rather sudden changes of state are the properties distinguishing them from each other. There is an urgent need to better understand the mechanical activity of the myometrium (its contractility) to find a solution for preterm delivery problem, the largest cause of neonatal deaths and morbidity...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29157374/time-series-analysis-based-on-two-part-models-for-excessive-zero-count-data-to-detect-farm-level-outbreaks-of-swine-echinococcosis-during-meat-inspections
#13
Yasumoto Adachi, Kohei Makita
Echinococcus multilocularis is a parasite that causes highly pathogenic zoonoses and is maintained in foxes and rodents on Hokkaido Island, Japan. Detection of E. multilocularis infections in swine is epidemiologically important. In Hokkaido, administrative information is provided to swine producers based on the results of meat inspections. However, as the current criteria for providing administrative information often results in delays in providing information to producers, novel criteria are needed. Time series models were developed to monitor autocorrelations between data and lags using data collected from 84 producers at the Higashi-Mokoto Meat Inspection Center between April 2003 and November 2015...
December 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/29156269/autotrophic-denitrification-supported-by-biotite-dissolution-in-crystalline-aquifers-2-transient-mixing-and-denitrification-dynamic-during-long-term-pumping
#14
Clément Roques, Luc Aquilina, Alexandre Boisson, Virginie Vergnaud-Ayraud, Thierry Labasque, Laurent Longuevergne, Marc Laurencelle, Alexis Dufresne, Jean-Raynald de Dreuzy, Hélène Pauwels, Olivier Bour
We investigated the mixing and dynamic of denitrification processes induced by long-term pumping in the crystalline aquifer of Ploemeur (Brittany, France). Hydrological and geochemical parameters have been continuously recorded over 15 boreholes in 5km(2) on a 25-year period. This extensive spatial and temporal monitoring of conservative as well as reactive compounds is a key opportunity to identify aquifer-scale transport and reactive processes in crystalline aquifers. Time series analysis of the conservative elements recorded at the pumped well were used to determine mixing fractions from different compartments of the aquifer on the basis of a Principal Component Analysis approach coupled with an end-member mixing analysis...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29155866/correction-multiscale-adaptive-analysis-of-circadian-rhythms-and-intradaily-variability-application-to-actigraphy-time-series-in-acute-insomnia-subjects
#15
(no author information available yet)
[This corrects the article DOI: 10.1371/journal.pone.0181762.].
2017: PloS One
https://www.readbyqxmd.com/read/29155762/high-throughput-analysis-of-locomotor-behavior-in-the-drosophila-island-assay
#16
Ilse Eidhof, Michaela Fenckova, Dei M Elurbe, Bart van de Warrenburg, Anna Castells Nobau, Annette Schenck
Advances in next-generation sequencing technologies contribute to the identification of (candidate) disease genes for movement disorders and other neurological diseases at an increasing speed. However, little is known about the molecular mechanisms that underlie these disorders. The genetic, molecular, and behavioral toolbox of Drosophila melanogaster makes this model organism particularly useful to characterize new disease genes and mechanisms in a high-throughput manner. Nevertheless, high-throughput screens require efficient and reliable assays that, ideally, are cost-effective and allow for the automatized quantification of traits relevant to these disorders...
November 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155727/microrna-based-liquid-biopsy-the-experience-of-the-plasma-mirna-signature-classifier-msc-for-lung-cancer-screening
#17
Mavis Mensah, Cristina Borzi, Carla Verri, Paola Suatoni, Davide Conte, Ugo Pastorino, Fortunato Orazio, Gabriella Sozzi, Mattia Boeri
The development of a minimally invasive test, such as liquid biopsy, for early lung cancer detection in its preclinical phase is crucial to improve the outcome of this deadly disease. MicroRNAs (miRNAs) are tissue specific, small, non-coding RNAs regulating gene expression, which may act as extracellular messengers of biological signals derived from the cross-talk between the tumor and its surrounding microenvironment. They could thus represent ideal candidates for early detection of lung cancer. In this work, a methodological workflow for the prospective validation of a circulating miRNA test using custom made microfluidic cards and quantitative Real-Time PCR in plasma samples of volunteers enrolled in a lung cancer screening trial is proposed...
October 26, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155117/pediatric-non-missile-penetrating-head-injury-case-series-and-literature-review
#18
REVIEW
Evangelos Drosos, Dimitrios Giakoumettis, Alexandros Blionas, Andreas Mitsios, Georgios Sfakianos, Marios Themistocleous
BACKGROUND: Pediatric non-missile penetrating head injury (NMPHI) is usually accidental attributed mainly to the softer skulls of growing children. However, it is a rather rare entity and therefore no consensus exists regarding treatment, in order to effectively prevent the immediate and long-term complications. Throughout the literature practice, essentials are mostly discussed in case reviews and case series in general population. No data originating from randomized studies are available due to ethical and practical limitations...
November 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29155066/unruptured-versus-ruptured-avms-outcome-analysis-from-a-multicentric-consecutive-series-of-545-surgically-treated-cases
#19
Marco Cenzato, Fulvio Tartara, Giuseppe D'Aliberti, Carlo Bortolotti, Francesco Cardinale, Gianfranco Ligarotti, Alberto Debernardi, Alessia Fratianni, Edoardo Boccardi, Roberto Stefini, Francesco Zenga, Riccardo Boccaletti, Andrea Lanterna, Giacomo Pavesi, Paolo Ferroli, Carmelo Sturiale, Alessandro Ducati, Andrea Cardia, Maurizio Piparo, Luca Valvassori, Mariangela Piano
Recent literature strongly challenged indications to perform preventive surgery in unruptured AVM. claiming that invasive AVM treatment is associated with a significant risk of complications and thus conservative management may be a preferable alternative in many patients. On the other hand, the recent improvement of surgical instrumentation and treatment strategies (both surgical and interventional) yielded much better outcomes than those achieved only a decade ago. Therefore, even among the specialists, a wide variety of opinions, concerning the treatment of unruptured AVM, can be found...
November 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29154774/recommendations-for-care-of-geriatric-maxillofacial-trauma-patients-following-a-retrospective-10-year-multicenter-review
#20
Robert Shumate, Jason Portnof, Melissa Amundson, Eric Dierks, Robert Batdorf, Patrick Hardigan
PURPOSE: The purpose of this study was to analyze maxillofacial trauma sustained by patients at least 75 years old. With the injury patterns identified, treatment recommendations for the contemporary oral and maxillofacial surgeon are made. PATIENTS AND METHODS: This study was a retrospective case series using data from 2 level 1 trauma centers. The variables of interest included age at traumatic event, gender, mechanism of trauma, concomitant injuries, radiographic studies performed, management of maxillofacial injuries, and disposition...
October 26, 2017: Journal of Oral and Maxillofacial Surgery
keyword
keyword
12102
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"