scholarly journals Influence of the Inter-Trial Interval, Movement Observation, and Hand Dominance on the Previous Trial Effect

2021 ◽  
Vol 15 ◽  
Author(s):  
Hitoshi Oda ◽  
Yasushi Sawaguchi ◽  
Taku Kawasaki ◽  
Shiho Fukuda ◽  
Koichi Hiraoka
Keyword(s):  
Correlation Coefficient ◽  
Absolute Difference ◽  
Hand Dominance ◽  
Previous Trial ◽  
Motor Execution ◽  
Trial Effect ◽  
Movement Observation ◽  
Inter Trial Interval ◽  
The Absolute ◽  
Over Time

Previous studies have shown that current movement is influenced by the previous movement, which is known as the previous trial effect. In this study, we investigated the influence of the inter-trial interval, movement observation, and hand dominance on the previous trial effect of the non-target discrete movement. Right-handed healthy humans abducted the index finger in response to a start cue, and this task was repeated with constant inter-trial intervals. The absolute difference in the reaction time (RT) between the previous and current trials increased as the inter-trial interval increased. The absolute difference in RT reflects the reproducibility of the time taken for the motor execution between two consecutive trials. Thus, the finding supported the view that there is a carryover of movement information from one trial to the next, and that the underlying reproducibility of the RT between the two consecutive trials decays over time. This carryover of movement information is presumably conveyed by implicit short-term memory, which also decays within a short period of time. The correlation coefficient of the RT between the previous and current trials decreased with an increase in the inter-trial interval, indicating that the common responsiveness of two consecutive trials weakens over time. The absolute difference was smaller when the response was performed while observing finger movement, indicating that a carryover of the visual information to the next trial enhances the reproducibility of the motor execution process between consecutive trials. Hand dominance did not influence the absolute difference or correlation coefficient, indicating that the central process mediating previous trial effect of hand movement is not greatly lateralized.

scholarly journals How Many Days are Necessary to Represent Typical Daily Leg Movement Behavior for Infants at Risk of Developmental Disabilities?

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5344
Author(s):  
Weiyang Deng ◽  
Ryota Nishiyori ◽  
Douglas L. Vanderbilt ◽  
Beth A. Smith
Keyword(s):  
At Risk ◽  
Developmental Disabilities ◽  
Correlation Coefficient ◽  
Wearable Sensors ◽  
Movement Behavior ◽  
Absolute Difference ◽  
Spearman Correlation ◽  
Movement Data ◽  
Leg Movement ◽  
The Absolute

Background: Movement characteristics can differentiate between infants at risk and infants with typical development. However, it is unknown how many days are needed to accurately represent typical daily behavior for infants at risk of developmental disabilities when using wearable sensors. To consider the balance between participant burden and the amount of data collected and optimizing the efficiency of data collection, our study determined (1) how many days were necessary to represent typical movement behavior for infants at risk of developmental disabilities and (2) whether movement behavior was different on weekend days and weekdays. Methods: We used Opal wearable sensors to collect at least 5 days of 11 infants’ leg movement data. The standard (average of 5 days) was compared with four methods (average of the first 1/2/3/4 days) using the Bland–Altman plots and the Spearman correlation coefficient. We also compared the data from the average of 2 weekend days to the average of the first 2 weekdays for 8 infants. Results: The Spearman correlation coefficient comparing the average of the first 2 days of data and the standards were all above 0.7. The absolute differences between them were all below 10% of the standards. The Bland–Altman plots showed more than 90% of the data points comparing the average of 2 days and the standards fell into the limit of agreement for each variable. The absolute difference between weekend days and weekdays for the leg movement rate, duration, average acceleration, and peak acceleration was 15.2%, 1.7%, 6.8% and 6.3% of the corresponding standard, respectively. Conclusion: Our results suggest 2 days is the optimal amount of data to represent typical daily leg movement behavior of infants at risk of developmental disabilities while minimizing participant burden. Further, leg movement behavior did not differ distinctly across weekend days and weekdays. These results provide supportive evidence for an efficient amount of data collections when using wearable sensors to evaluate movement behavior in infants at risk of developmental disabilities.

scholarly journals Comparing Non-invasive Inverse Electrocardiography With Invasive Endocardial and Epicardial Electroanatomical Mapping During Sinus Rhythm

2021 ◽  
Vol 12 ◽  
Author(s):  
Robert W. Roudijk ◽  
Machteld J. Boonstra ◽  
Rolf Brummel ◽  
Wil Kassenberg ◽  
Lennart J. Blom ◽  
...  
Keyword(s):  
Sinus Rhythm ◽  
Right Ventricular ◽  
Correlation Coefficient ◽  
Left Ventricular ◽  
Absolute Difference ◽  
Non Invasive ◽  
Inverse Electrocardiography ◽  
Ventricular Activation ◽  
The Absolute ◽  
Endocardial Activation

This study presents a novel non-invasive equivalent dipole layer (EDL) based inverse electrocardiography (iECG) technique which estimates both endocardial and epicardial ventricular activation sequences. We aimed to quantitatively compare our iECG approach with invasive electro-anatomical mapping (EAM) during sinus rhythm with the objective of enabling functional substrate imaging and sudden cardiac death risk stratification in patients with cardiomyopathy. Thirteen patients (77% males, 48 ± 20 years old) referred for endocardial and epicardial EAM underwent 67-electrode body surface potential mapping and CT imaging. The EDL-based iECG approach was improved by mimicking the effects of the His-Purkinje system on ventricular activation. EAM local activation timing (LAT) maps were compared with iECG-LAT maps using absolute differences and Pearson’s correlation coefficient, reported as mean ± standard deviation [95% confidence interval]. The correlation coefficient between iECG-LAT maps and EAM was 0.54 ± 0.19 [0.49–0.59] for epicardial activation, 0.50 ± 0.27 [0.41–0.58] for right ventricular endocardial activation and 0.44 ± 0.29 [0.32–0.56] for left ventricular endocardial activation. The absolute difference in timing between iECG maps and EAM was 17.4 ± 7.2 ms for epicardial maps, 19.5 ± 7.7 ms for right ventricular endocardial maps, 27.9 ± 8.7 ms for left ventricular endocardial maps. The absolute distance between right ventricular endocardial breakthrough sites was 30 ± 16 mm and 31 ± 17 mm for the left ventricle. The absolute distance for latest epicardial activation was median 12.8 [IQR: 2.9–29.3] mm. This first in-human quantitative comparison of iECG and invasive LAT-maps on both the endocardial and epicardial surface during sinus rhythm showed improved agreement, although with considerable absolute difference and moderate correlation coefficient. Non-invasive iECG requires further refinements to facilitate clinical implementation and risk stratification.

scholarly journals Infinitely many equivalent versions of the graceful tree conjecture

2015 ◽  
Vol 9 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Tao-Ming Wang ◽  
Cheng-Chang Yang ◽  
Lih-Hsing Hsu ◽  
Eddie Cheng
Keyword(s):  
Perfect Matching ◽  
Absolute Difference ◽  
Extra Condition ◽  
Graceful Labeling ◽  
The Absolute

A graceful labeling of a graph with q edges is a labeling of its vertices using the integers in [0, q], such that no two vertices are assigned the same label and each edge is uniquely identified by the absolute difference between the labels of its endpoints. The well known Graceful Tree Conjecture (GTC) states that all trees are graceful, and it remains open. It was proved in 1999 by Broersma and Hoede that there is an equivalent conjecture for GTC stating that all trees containing a perfect matching are strongly graceful (graceful with an extra condition). In this paper we extend the above result by showing that there exist infinitely many equivalent versions of the GTC. Moreover we verify these infinitely many equivalent conjectures of GTC for trees of diameter at most 7. Among others we are also able to identify new graceful trees and in particular generalize the ?-construction of Stanton-Zarnke (and later Koh- Rogers-Tan) for building graceful trees through two smaller given graceful trees.

scholarly journals Inadequacy of 3-month Oswestry Disability Index outcome for assessing individual longer-term patient experience after lumbar spine surgery

2016 ◽  
Vol 25 (2) ◽  
pp. 170-180 ◽  
Author(s):  
Anthony L. Asher ◽  
Silky Chotai ◽  
Clinton J. Devin ◽  
Theodore Speroff ◽  
Frank E. Harrell ◽  
...  
Keyword(s):  
Patient Experience ◽  
Spine Surgery ◽  
Oswestry Disability Index ◽  
Absolute Difference ◽  
Lumbar Spine Surgery ◽  
Substantial Clinical Benefit ◽  
Degenerative Lumbar Disease ◽  
Spine Care ◽  
The Absolute ◽  
Prospective Longitudinal

OBJECTIVE Prospective longitudinal outcomes registries are at the center of evidence-driven health care reform. Obtaining real-world outcomes data at 12 months can be costly and challenging. In the present study, the authors analyzed whether 3-month outcome measurements sufficiently represent 12-month outcomes for patients with degenerative lumbar disease undergoing surgery. METHODS Data from 3073 patients undergoing elective spine surgery for degenerative lumbar disease were entered into a prospective multicenter registry (N2QOD). Baseline, 3-month, and 12-month follow-up Oswestry Disability Index (ODI) scores were recorded. The absolute differences between actual 12- and 3-month ODI scores was evaluated. Additionally, the authors analyzed the absolute difference between actual 12-month ODI scores and a model-predicted 12-month ODI score (the model used patients' baseline characteristics and actual 3-month scores). The minimal clinically important difference (MCID) for ODI of 12.8 points and the substantial clinical benefit (SCB) for ODI of 18.8 points were used based on the previously published values. The concordance rate of achieving MCID and SCB for ODI at 3-and 12-months was computed. RESULTS The 3-month ODI scores differed from 12-month scores by an absolute difference of 11.9 ± 10.8, and predictive modeling estimations of 12-month ODI scores differed from actual 12-month scores by a mean (± SD) of 10.7 ± 9.0 points (p = 0.001). Sixty-four percent of patients (n = 1982) achieved an MCID for ODI at 3 months in comparison with 67% of patients (n = 2088) by 12 months; 51% (n = 1731) and 61% (n = 1860) of patients achieved SCB for ODI at 3 months and 12 months, respectively. Almost 20% of patients had ODI scores that varied at least 20 points (the point span of an ODI functional category) between actual 3- and 12-month values. In the aggregate analysis of achieving MCID, 77% of patients were concordant and 23% were discordant in achieving or not achieving MCID at 3 and 12 months. The discordance rates of achieving or not achieving MCID for ODI were in the range of 19% to 27% for all diagnoses and treatments (decompression with and without fusion). The positive and negative predictive value of 3-months ODI to predict 12-month ODI was 86% and 60% for MCID and 82% and 67% for SCB. CONCLUSIONS Based on their findings, the authors conclude the following: 1) Predictive methods for functional outcome based on early patient experience (i.e., baseline and/or 3-month data) should be used to help evaluate the effectiveness of procedures in patient populations, rather than serving as a proxy for long-term individual patient experience. 2) Prospective longitudinal registries need to span at least 12 months to determine the effectiveness of spine care at the individual patient and practitioner level.

scholarly journals Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India

2005 ◽  
Vol 23 (4) ◽  
pp. 1093-1101 ◽  
Author(s):  
S. N. Tripathi ◽  
Sagnik Dey ◽  
A. Chandel ◽  
S. Srivastava ◽  
Ramesh P. Singh ◽  
...  
Keyword(s):  
Aerosol Optical Depth ◽  
Optical Depth ◽  
Time Window ◽  
Absolute Error ◽  
Absolute Difference ◽  
Ganga Basin ◽  
Monsoon Period ◽  
Post Monsoon ◽  
Dust Loading ◽  
The Absolute

Abstract. The Moderate Resolution Imaging Spectroradiometer (MODIS) onboard EOS Terra measures global aerosol optical depth and optical properties since 2000. MODIS aerosol products are freely available and are being used for numerous studies. In this paper, we present a comparison of aerosol optical depth (AOD) retrieved from MODIS with Aerosol Robotic Network (AERONET) data for the year 2004 over Kanpur, an industrial city lying in the Ganga Basin in the northern part of India. AOD retrieved from MODIS (τaMODIS) at 0.55µm wavelength has been compared with the AERONET derived AOD (τaAERONET), within an optimum space-time window. Although the correlation between τaMODIS and τaAERONET during the post-monsoon and winter seasons (R2~0.71) is almost equal to that during the pre-monsoon and monsoon seasons (R2~0.72), MODIS is found to overestimate AOD during the pre-monsoon and monsoon period (characterized by severe dust loading) and underestimate during the post-monsoon and winter seasons. The absolute difference between τaMODIS and τaAERONET is found to be low (0.12±0.11) during the non-dust loading season and much higher (0.4±0.2) during dust-loading seasons. The absolute error in τaMODIS is found to be about ~25% of the absolute values of τaMODIS. Our comparison shows the importance of modifying the existing MODIS algorithm during the dust-loading seasons, especially in the Ganga Basin in northern part of India.

scholarly journals The correlation strength of the most important cryptocurrencies in the bull and bear market

2020 ◽  
Vol 17 (3) ◽  
pp. 67-81
Author(s):  
Sebastian Lahajnar ◽  
Alenka Rožanec
Keyword(s):  
Correlation Coefficient ◽  
Strong Correlation ◽  
Pearson Correlation ◽  
Pearson Correlation Coefficient ◽  
Strongly Correlated ◽  
Moderate Correlation ◽  
Bear Market ◽  
Research Findings ◽  
Correlation Strength ◽  
Over Time

The article explores the correlation strength of the ten most important cryptocurrencies, emphasizing the examination of differences during the periods of rising and falling prices. The daily and weekly returns of selected cryptocurrencies are taken as the basis for calculating and determining the correlation strength using the Pearson correlation coefficient. The survey covers the period from the beginning of 2017 to Bitcoin’s last local bottom in mid-March 2020. Research findings are as follows: 1) the most important cryptocurrencies are mostly moderately positively correlated with each other over time; 2) correlation strength decreases slightly during the bull period, but mostly remain in the range of moderate correlation; 3) correlation strength increases significantly during the bear period, with most cryptocurrencies strongly correlated with each other. The results do not change significantly if the daily or weekly cryptocurrency returns are used as the basis. A strong correlation in the period of falling prices prevents the effective diversification of the cryptocurrency portfolio, which must be considered when investing funds in the cryptocurrency market.

scholarly journals The effect of tri hita karana culture in relationship between work stress and internal auditor performance

2019 ◽  
Vol 6 (2) ◽  
pp. 72-78 ◽  
Author(s):  
A.A. Gde Dwi Aditya ◽  
Made Gede Wira Kusuma
Keyword(s):  
Work Stress ◽  
Sampling Method ◽  
Sampling Technique ◽  
Absolute Difference ◽  
Validity And Reliability ◽  
Internal Auditor ◽  
Significance Level ◽  
Internal Auditors ◽  
The Absolute ◽  
Test Requirements

The purpose of this study was to obtain empirical evidence regarding the effect of work stress on auditor performance, and Tri Hita Karana's cultural ability to moderate the effect of work stress on auditor performance. The technique of determining the sample used is the nonprobability sampling method with a purposive sampling technique. The questionnaire is used as a method of data collection. The questionnaire is used as a method of collecting data sent to the internal auditors of Rural Banks (BPR). Of the 51 questionnaires distributed to all BPRs in Badung Regency, 43 questionnaires were feasible to analyze, with a questionnaire return rate of 94 percent and a questionnaire level that could be used at 84 percent. The hypothesis was tested at a 5 percent significance level using the Absolute Difference Value Test. The hypothesis was tested at a significance level of 5 percent using the Absolute Difference Value Test with the SPSS program. The output of the research instrument testing shows that the instrument has passed the validity and reliability test, and has fulfilled the classical assumption test requirements.

The Artful Politics of Trauma: Rancière’s Critique of Lyotard

2018 ◽  
pp. 121-141
Author(s):  
Tina Chanter
Keyword(s):  
The Other ◽  
Absolute Difference ◽  
The Sublime ◽  
The Holocaust ◽  
Singular Event ◽  
Privileged Status ◽  
Specific Meaning ◽  
Per Se ◽  
The Absolute

Just as Rancière challenges the absolute difference between politics and art, he resists the absolutization of the other that he sees as characteristic of the ethical turn in contemporary aesthetics. The tendency of Lyotard, however, remains turning alterity into the unrepresentable, the unassimilable, and the unthinkable. Its consequences are precisely what Rancière forebodes with the appropriation of the sublime: For all its talk of art witnessing that which is unrepresentable—and the holocaust as the unrepresentable per se—the ethical turn only manages to rejoin a discourse of purism. If everyone is traumatised, what specific meaning remains for trauma? This chapter explores the context of Rancière’s critique of Lyotard, particularly regarding the attenuation of any sense to trauma that accumulates a privileged status for its singular event; it subsequently interrogates the generalization of trauma to such an extent that one evacuates it of any significance.

Madhva (1238?–1317?)

2018 ◽  
Author(s):  
Valerie Stoker
Keyword(s):  
Absolute Difference ◽  
Philosophical School ◽  
The World ◽  
The Absolute ◽  
Canonical Texts

Madhva, Hindu theologian and ascetic, founded the philosophical school commonly called Dvaita Vedānta, but which Madhva and his followers termed tattvavāda, or realism. The name Dvaita refers to Madhva’s dualistic interpretation of the Hindu canonical texts known as the Upaniṣads, also known as Vedānta. In contrast to the monist and semi-monist systems of his two major Vedāntin predecessors, Śaṅkara and Rāmānuja, Madhva asserted the absolute difference between God (īśvara) and human souls (jīva), claiming that they were uncreated, eternal principles with fundamentally distinct natures. Madhva delineated the respective natures of God and souls so as to assert God’s complete transcendence of the world and to legitimate the practice of devotion as the principal means of attaining liberation from the cycle of rebirth (saṃsāra). Madhva’s realist epistemology served as the foundation for this ontological emphasis on difference (bheda).

scholarly journals Decreases in Ventricular Volume Correlate with Decreases in Ventricular Pressure in Idiopathic Normal Pressure Hydrocephalus Patients Who Experienced Clinical Improvement after Implantation with Adjustable Valve Shunts

Neurosurgery ◽  
2004 ◽  
Vol 55 (3) ◽  
pp. 582-593 ◽  
Author(s):  
Kathleen A. McConnell ◽  
Kelly H. Zou ◽  
Alexandra V. Chabrerie ◽  
Nancy Olsen Bailey ◽  
Peter McL. Black
Keyword(s):  
Correlation Coefficient ◽  
Clinical Improvement ◽  
Normal Pressure Hydrocephalus ◽  
Normal Pressure ◽  
Ventricular Volume ◽  
Idiopathic Normal Pressure Hydrocephalus ◽  
Adjustable Valve ◽  
Programmable Valve ◽  
Valve Pressure ◽  
Over Time

Abstract OBJECTIVE: This retrospective study examined whether changes in ventricular volume correspond with changes in adjustable valve pressure settings in a cohort of patients who received shunts to treat idiopathic normal pressure hydrocephalus. We also examined whether these pressure–volume curves and other patient variables would co-occur with a positive clinical response to shunting. METHODS: We selected 51 patients diagnosed with idiopathic normal pressure hydrocephalus who had undergone implantation of a Codman Hakim programmable valve (Medos S.A., Le Locle, Switzerland). Clinical data were gathered from the patients' records and clinical notes by an investigator blinded to patients' ventricular volumes. Ventricular volume was measured using 3D Slicer, an image analysis and interactive visualization software package developed and maintained at the Surgical Planning Laboratory at Brigham and Women's Hospital. RESULTS: Eighty-six percent of patients with gait disturbance at presentation showed improvement of this symptom, 70% experienced improvement in incontinence, and 69% experienced improvement in dementia. For the group showing 100% clinical improvement, the correlation coefficient of average changes in valve pressure over time (ΔP/ΔT) and average changes in ventricular volume over time (ΔV/ΔT) were high at 0.843 (P < 0.05). For the group experiencing no or only partial improvement, the correlation coefficient was 0.257 (P = 0.32), indicating no correlation between average ΔV/ΔT and average ΔP/ΔT for each patient. CONCLUSION: This was a carefully analyzed modeling study of idiopathic normal pressure hydrocephalus treatment made possible only by adjustable valve technology. With careful volumetric analysis, we found that changes in ventricular volume correlated with adjustments in valve pressure settings for those patients who improved clinically after shunting. This suggests that positive clinical responders retained parenchymal elasticity, emphasizing the importance of dynamic changes in this cohort.

Sign in / Sign up

Export Citation Format

Share Document