scholarly journals Prediction of Long-Term Elbow Flexion Force Intervals Based on the Informer Model and Electromyography

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1946
Author(s):  
Wei Lu ◽  
Lifu Gao ◽  
Zebin Li ◽  
Daqing Wang ◽  
Huibin Cao
Keyword(s):  
A Priori ◽  
Linear Part ◽  
Elbow Flexion ◽  
Probability Interval ◽  
Biomechanical Models ◽  
Non Linear ◽  
Long Term Prediction ◽  
The Relationship ◽  
Flexion Force

Accurate and long-term prediction of elbow flexion force can be used to recognize the intended movement and help wearable power-assisted robots to improve control performance. Our study aimed to find a proper relationship between electromyography and flexion force. However, the existing methods must incorporate biomechanical models to produce accurate and timely predictions of flexion force. Elbow flexion force is largely determined by the contractile properties of muscles, and the relationship between flexion force and the motor function of muscles has to be thoroughly analyzed. Therefore, based on the investigation on the contributions of different muscles to the flexion force, original electromyography signals were decomposed into non-linear and non-stationary parts. We selected the mean absolute value (MAV) of the non-linear part and the variance of the non-stationary part as inputs for an Informer prediction model that does not require detailed a priori knowledge of biomechanical models and is optimized for processing time sequences. Finally, a long-term flexion force probability interval is proposed. The proposed framework performs well in predicting long-term flexion force and outperforms other state-of-the-art models when compared to experimental results.

scholarly journals Are there non-linear relationships between alcohol consumption and long-term health? Protocol for a systematic review of observational studies employing approaches to improve causal inference

BMJ Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. e043985
Author(s):  
Rachel Visontay ◽  
Matthew Sunderland ◽  
Tim Slade ◽  
Jack Wilson ◽  
Louise Mewton
Keyword(s):  
Systematic Review ◽  
Alcohol Consumption ◽  
Health Outcomes ◽  
Causal Inference ◽  
Study Design ◽  
Observational Studies ◽  
Alcohol Exposure ◽  
Non Linear ◽  
The Relationship

IntroductionThere is a substantial literature finding that moderate alcohol consumption is protective against certain health conditions. However, more recent research has highlighted the possibility that these findings are methodological artefacts, caused by confounding and other biases. While modern analytical and study design approaches can mitigate confounding and thus enhance causal inference in observational studies, they are not routinely applied in research assessing the relationship between alcohol use and long-term health outcomes. The purpose of this systematic review is to identify observational studies that employ these analytical/design-based approaches in assessing whether relationships between alcohol consumption and health outcomes are non-linear. This review seeks to evaluate, on a per-outcome basis, what these studies find the strength and form of the relationship between alcohol consumption and health to be.Methods and analysisElectronic databases (MEDLINE, PsycINFO, Embase and SCOPUS) were searched in May 2020. Study selection will comply with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Articles will be screened against eligibility criteria intended to capture studies using observational data to assess the relationship between varying levels of alcohol exposure and any long-term health outcome (actual or surrogate), and that have employed at least one of the prespecified approaches to enhancing causal inference. Risk of bias of included articles will be assessed using study design-specific tools. A narrative synthesis of the results is planned.Ethics and disseminationFormal ethics approval is not required given there will be no primary data collection. The results of the study will be disseminated through published manuscripts, conferences and seminar presentations.PROSPERO registration numberCRD42020185861.

scholarly journals Are there non-linear relationships between alcohol consumption and long-term health?: Protocol for a systematic review of observational studies employing approaches to improve causal inference

2020 ◽  
Author(s):  
Rachel Visontay ◽  
Matthew Sunderland ◽  
Tim Slade ◽  
Jack Wilson ◽  
Louise Mewton
Keyword(s):  
Systematic Review ◽  
Alcohol Consumption ◽  
Health Outcomes ◽  
Causal Inference ◽  
Study Design ◽  
Observational Studies ◽  
Alcohol Exposure ◽  
Non Linear ◽  
The Relationship

Introduction: There is a substantial literature finding that moderate alcohol consumption is protective against certain health conditions. However, more recent research has highlighted the possibility that these findings are methodological artefacts, caused by confounding and other biases. While modern analytical and study design approaches can enhance causal inference in observational studies, they are not routinely applied in research assessing the relationship between alcohol use and long-term health outcomes. The purpose of this systematic review is to identify observational studies that employ these analytical/design-based approaches in assessing whether relationships between alcohol consumption and health outcomes are non-linear. This review seeks to evaluate, on a per-outcome basis, what these studies find the strength and form of the relationship between alcohol consumption and health to be.Methods and analysis: Electronic databases (MEDLINE, PsycINFO, Embase and SCOPUS) were searched in May 2020. Study selection will comply with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Articles will be screened against eligibility criteria intended to capture studies using observational data to assess the relationship between varying levels of alcohol exposure and any long-term health outcome (actual or surrogate), and that have employed at least one of the pre-specified approaches to enhancing causal inference. Risk of bias of included articles will be assessed using study design-specific tools. A narrative synthesis of the results is planned.

Impact of soil hydraulic properties on water-soil-plant relations

2021 ◽  
Author(s):  
Mathieu Javaux ◽  
Andrea Carminati
Keyword(s):  
Linear Part ◽  
Agricultural Practices ◽  
Natural Ecosystems ◽  
Plant Hydraulics ◽  
Soil Hydraulics ◽  
Non Linear ◽  
Below Ground ◽  
The Difference ◽  
The Impact

<p>Modeling stomatal response to soil drying is of crucial importance for estimating transpiration fluxes. There is a critical need for a better quantification of the impact of soil water limitation on vegetation in order to predict more accurately the impact of climate change on natural ecosystems and adapt agricultural practices.</p><p>Recently, we proposed a simple conceptual model, which predicts how soil and plant hydraulics affect transpiration.  This model reconciles soil- and root-based perspectives on drought stress and defines a 3D surface, which represents the maximum possible transpiration rate that can be sustained by a soil-plant system. The shape of this surface shows two distinct zones: a linear zone where the increase of transpiration is proportional to the difference of potential between soil and root and a non linear part in which an increase of E generates a huge decrease of leaf water potential. We show that this nonlinearity is mainly controlled by below ground hydraulic conductance. We hypothesize that plants should avoid this non linear zone by (1) adapting their short term stomatal regulation and (2) ensuring long term coordination between canopy and root hydraulics with growth. It implies that difference in soil hydraulics will lead to contrasted plant hydraulic and structural vegetation properties. Evidences exist at plant scales that this coordination exists. We further discuss how this might affect (agro-)ecosystem-water relations.    </p>

Long term prediction of non-linear vertical bending moments on a fast monohull

2004 ◽  
Vol 26 (6) ◽  
pp. 288-297 ◽  
Author(s):  
C. Guedes Soares ◽  
N. Fonseca ◽  
R. Pascoal
Keyword(s):  
Bending Moments ◽  
Term Prediction ◽  
Non Linear ◽  
Long Term Prediction

scholarly journals Methods of studying the risk process in disability insurance

1969 ◽  
Vol 5 (2) ◽  
pp. 267-273 ◽  
Author(s):  
Ove Lundberg
Keyword(s):  
A Priori ◽  
Risk Process ◽  
Statistical Information ◽  
Primary Event ◽  
Short Intervals ◽  
Direct Dependence ◽  
The Future ◽  
Actual Damage ◽  
The Relationship

The aim of this study is to find suitable methods for utilizing available statistical information on the risk development of terminated insurances. This information may comprise not only data respecting sex, age, insurance tariff, etc., but also the points of time when certain events—disability, injuries or damages—have occurred as well as their durability and cause. The method study here presented is based on statistical material gathered from long-term disability insurances which have ceased to be valid, either in consequence of the expiration of the term of insurance, or the insured's death. We endeavour to study the point of time when the first event (disability) occurred and the relation between subsequent events, searching suitable methods for assessing risks after the occurrence of the primary event.The influence of passed events upon the future risk process may be explained by either a direct dependence between actual events—actual damage or disability may have an impairment for the future of the risk—or by heterogeneity a priori. In the former case, we may speak of a contagious process (Polya-Eggenberger), and, in the latter case, the occurrence or non-occurrence of an event may, according to Lexis and Newbold, act as a risk differentiating factor providing a theoretical basis for a technique of experience rating.It is difficult to decide whether the relationship noted in respect of a risk process is of the direct or the indirect kind. A direct dependence between one event and the following ones has no relevance to a study of the incidence of the first event and the time of its occurrence. We avoid in such a study the obstacles created by formal rules and regulations with regard to the problem of whether two or more disability periods occurring at short intervals should be considered as a single disability period or not. In order to measure the frequency of the first event we have—as in the case of measuring mortality—to limit the period exposed to risk until the occurrence of the first event.

Long-term prediction of water quality for three types of catchment

1999 ◽  
Vol 50 (6) ◽  
pp. 493 ◽  
Author(s):  
Serguei Sokolov ◽  
Kerry P. Black
Keyword(s):  
Water Quality ◽  
Temporal Change ◽  
Stream Water ◽  
Model Parameters ◽  
Long Period ◽  
Forested Areas ◽  
Long Term Prediction ◽  
The Relationship ◽  
Large Catchment

A simple dynamic model relating the temporal change of the total mass of chemicals in a catchment to the chemical loading in the river provides high-accuracy predictions of absolute and time- integrated chemical loads. The developed model is able to reproduce effectively and simultaneously for all considered time scales the observed hysteresis in the relationship between chemical concentration in stream water and river discharge. Three types of catchment have been examined for long-term modelling: a local urban streamwater catchment, a transition urban–agricultural catchment and a large catchment with varied land use (urban, agricultural and protected forested areas). The long-period changes in model parameters and in water-quality variables are determined for each catchment.

scholarly journals The Relationship Between Leverage, Maturity, and Investment Decision: Evidence From Emerging Markets

2019 ◽  
Vol 10 (1) ◽  
pp. 147-164 ◽  
Author(s):  
Vina Christina Nugroho ◽  
Kim Sung Suk
Keyword(s):  
Emerging Markets ◽  
Emerging Market ◽  
Investment Decision ◽  
Debt Maturity ◽  
Short Term ◽  
Non Linear ◽  
Linear Effects ◽  
Different Characteristics ◽  
The Relationship

In this paper, we examine simultaneous relationship between leverage, maturity and over(under)- investment in emerging markets. We divide leverage into short term and long term to investigate the relation between current and future simultaneous relationship between leverage and investment decision, between debt maturity and investment decision, and between leverage and debt maturity. This research used twenty emerging market data from 2006 – 2016. First of all, our results show that firms in emerging markets prefer to use short-term debt to long-term debt to minimize the underinvestment problem. Second, there is a simultaneous non-linear relation between long-term leverage and growth opportunities in emerging markets firms. Third, long-term debt has non-linear effects on investment decision in emerging markets firms. It can be concluded that firms in emerging markets have different characteristics with regard to their capabilities to manage the interaction between leverage, maturity and investment compared to developed markets.

Effects of a Priori Liking on the Elicitation of Mimicry

2010 ◽  
Vol 57 (6) ◽  
pp. 412-418 ◽  
Author(s):  
Mariëlle Stel ◽  
Rick B. van Baaren ◽  
Jim Blascovich ◽  
Eric van Dijk ◽  
Cade McCall ◽  
...  
Keyword(s):  
A Priori ◽  
The Relationship

Mimicry and prosocial feelings are generally thought to be positively related. However, the conditions under which mimicry and liking are related largely remain unspecified. We advance this specification by examining the relationship between mimicry and liking more thoroughly. In two experiments, we manipulated an individual’s a priori liking for another and investigated whether it influenced mimicry of that person. Our experiments demonstrate that in the presence of a reason to like a target, automatic mimicry is increased. However, mimicry did not decrease when disliking a target. These studies provide further evidence of a link between mimicry and liking and extend previous research by showing that a certain level of mimicry even occurs when mimicry behavior is inconsistent with one’s goals or motivations.

Sign in / Sign up

Export Citation Format

Share Document