scholarly journals Modeling the Effects of the Environment and the Host Plant on the Ripe Rot of Grapes, Caused by the Colletotrichum species

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2288
Author(s):  
Tao Ji ◽  
Irene Salotti ◽  
Chaoyang Dong ◽  
Ming Li ◽  
Vittorio Rossi
Keyword(s):  
Literature Review ◽  
Disease Control ◽  
Disease Incidence ◽  
Concordance Correlation Coefficient ◽  
Risk Of Infection ◽  
Concordance Correlation ◽  
Primary Inoculum ◽  
The Usa ◽  
Repeated Use ◽  
Colletotrichum Spp

Ripe rot caused by Colletotrichum spp. is a serious threat in many vineyards, and its control relies mainly on the repeated use of fungicides. A mechanistic, dynamic model for the prediction of grape ripe rot epidemics was developed by using information and data from a systematic literature review. The model accounts for i) the production and maturation of the primary inoculum; ii) the infection caused by the primary inoculum; iii) the production of a secondary inoculum; and iv) the infection caused by the secondary inoculum. The model was validated in 19 epidemics (vineyard × year combinations) between 1980 and 2014 in China, Japan, and the USA. The observed disease incidence was correlated with the number of infection events predicted by the model and their severity (ρ = 0.878 and 0.533, respectively, n=37, P≤ 0.001). The model also accurately predicted the disease severity progress during the season, with a concordance correlation coefficient of 0.975 between the observed and predicted data. Overall, the model provided an accurate description of the grape ripe rot system, as well as reliable predictions of infection events and of disease progress during the season. The model increases our understanding of ripe rot epidemics in vineyards and will help guide disease control. By using the model, growers can schedule fungicides based on the risk of infection rather than on a seasonal spray calendar.

Fallopian tubes and ovarian cancer (Literature review)

2019 ◽  
pp. 92-95
Author(s):  
D.G. Sumtsov ◽  
◽  
M.L. Kusyomenska ◽  
G.A. Sumtsov ◽  
◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Literature Review ◽  
Preventive Measures ◽  
Disease Incidence ◽  
Molecular Genetic ◽  
Serous Ovarian Cancer ◽  
Fallopian Tubes ◽  
Key Words Ovarian Cancer ◽  
Pelvic Peritoneum ◽  
Opportunistic Salpingectomy

In the literature review the authors present an analysis of the current stateproblem of ovarian cancer and ways of its possible solution. According to clinicalobservations and conducted in recent decades by morphological,immunohistochemical and molecular genetic studies it is fairly proved that theprimary cause of serous ovarian cancer is the pathology of the mucous layer offallopian tube. In the fallopian tube as a result of ciculation of inflammation andcarcinogens elements arises dysplasia of the mucosa with the development of thepreinvasive and initial invasive carcinoma with subsequent damage of the ovariesand pelvic peritoneum. Retrospective studies of a significant number of women’shealth status who had a deligation or removal of fallopian tubes in previous years showed a decrease in the disease incidence of serous ovarian cancer from 30 to 90%. The conclusions about the possibility of preventive measures of ovariancancer by opportunistic salpingectomy at post-productive age are made. In many world countries (Canada, China, France, Italy, Austria) the introduction of such a method of prevention has been started. We believe that in Ukraine there is an urgent need and all possibilities to solve this problem. Key words: ovarian cancer, preventive measures, opportunistic salpingectomy.

scholarly journals Transcranial Evoked Potentials Can Be Reliably Recorded with Active Electrodes

2021 ◽  
Vol 11 (2) ◽  
pp. 145
Author(s):  
Marco Mancuso ◽  
Valerio Sveva ◽  
Alessandro Cruciani ◽  
Katlyn Brown ◽  
Jaime Ibáñez ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Magnetic Stimulation ◽  
Primary Motor Cortex ◽  
The Other ◽  
Concordance Correlation Coefficient ◽  
Concordance Correlation ◽  
Eeg Signals ◽  
Active Electrode ◽  
Viable Solution ◽  
Space Projection

Electroencephalographic (EEG) signals evoked by transcranial magnetic stimulation (TMS) are usually recorded with passive electrodes (PE). Active electrode (AE) systems have recently become widely available; compared to PE, they allow for easier electrode preparation and a higher-quality signal, due to the preamplification at the electrode stage, which reduces electrical line noise. The performance between the AE and PE can differ, especially with fast EEG voltage changes, which can easily occur with TMS-EEG; however, a systematic comparison in the TMS-EEG setting has not been made. Therefore, we recorded TMS-evoked EEG potentials (TEPs) in a group of healthy subjects in two sessions, one using PE and the other using AE. We stimulated the left primary motor cortex and right medial prefrontal cortex and used two different approaches to remove early TMS artefacts, Independent Component Analysis and Signal Space Projection—Source Informed Recovery. We assessed statistical differences in amplitude and topography of TEPs, and their similarity, by means of the concordance correlation coefficient (CCC). We also tested the capability of each system to approximate the final TEP waveform with a reduced number of trials. The results showed that TEPs recorded with AE and PE do not differ in amplitude and topography, and only few electrodes showed a lower-than-expected CCC between the two methods of amplification. We conclude that AE are a viable solution for TMS-EEG recording.

A repeated measures concordance correlation coefficient

2007 ◽  
Vol 26 (16) ◽  
pp. 3095-3113 ◽  
Author(s):  
Tonya S. King ◽  
Vernon M. Chinchilli ◽  
Josep L. Carrasco
Keyword(s):  
Correlation Coefficient ◽  
Repeated Measures ◽  
Concordance Correlation Coefficient ◽  
Concordance Correlation

scholarly journals Estimation of coronary wave intensity analysis using noninvasive techniques and its application to exercise physiology

2016 ◽  
Vol 310 (5) ◽  
pp. H619-H627 ◽  
Author(s):  
Christopher J. Broyd ◽  
Sukhjinder Nijjer ◽  
Sayan Sen ◽  
Ricardo Petraco ◽  
Siana Jones ◽  
...  
Keyword(s):  
Coronary Circulation ◽  
Exercise Physiology ◽  
Left Ventricular ◽  
Wave Intensity ◽  
Concordance Correlation Coefficient ◽  
Intensity Analysis ◽  
Wave Intensity Analysis ◽  
Concordance Correlation ◽  
Decompression Wave ◽  
Pulsed Wave Doppler

Wave intensity analysis (WIA) has found particular applicability in the coronary circulation where it can quantify traveling waves that accelerate and decelerate blood flow. The most important wave for the regulation of flow is the backward-traveling decompression wave (BDW). Coronary WIA has hitherto always been calculated from invasive measures of pressure and flow. However, recently it has become feasible to obtain estimates of these waveforms noninvasively. In this study we set out to assess the agreement between invasive and noninvasive coronary WIA at rest and measure the effect of exercise. Twenty-two patients (mean age 60) with unobstructed coronaries underwent invasive WIA in the left anterior descending artery (LAD). Immediately afterwards, noninvasive LAD flow and pressure were recorded and WIA calculated from pulsed-wave Doppler coronary flow velocity and central blood pressure waveforms measured using a cuff-based technique. Nine of these patients underwent noninvasive coronary WIA assessment during exercise. A pattern of six waves were observed in both modalities. The BDW was similar between invasive and noninvasive measures [peak: 14.9 ± 7.8 vs. −13.8 ± 7.1 × 104 W·m−2·s−2, concordance correlation coefficient (CCC): 0.73, P < 0.01; cumulative: −64.4 ± 32.8 vs. −59.4 ± 34.2 × 102 W·m−2·s−1, CCC: 0.66, P < 0.01], but smaller waves were underestimated noninvasively. Increased left ventricular mass correlated with a decreased noninvasive BDW fraction ( r = −0.48, P = 0.02). Exercise increased the BDW: at maximum exercise peak BDW was −47.0 ± 29.5 × 104 W·m−2·s−2 ( P < 0.01 vs. rest) and cumulative BDW −19.2 ± 12.6 × 103 W·m−2·s−1 ( P < 0.01 vs. rest). The BDW can be measured noninvasively with acceptable reliably potentially simplifying assessments and increasing the applicability of coronary WIA.

scholarly journals Vaccine refusal and the endgame: walking the last mile first

2013 ◽  
Vol 368 (1623) ◽  
pp. 20120148 ◽  
Author(s):  
Diane S. Saint-Victor ◽  
Saad B. Omer
Keyword(s):  
Disease Control ◽  
Disease Incidence ◽  
Target Population ◽  
Special Issue ◽  
Disease Eradication ◽  
Vaccine Refusal ◽  
Last Mile ◽  
Low Levels

As multiple papers within this special issue illustrate, the dynamics of disease eradication are different from disease control. When it comes to disease eradication, ‘the last mile is longest’. For social and ecological reasons such as vaccine refusal, further ending incidence of a disease when it has reached low levels is frequently complex. Issues of non-compliance within a target population often influence the outcome of disease eradication efforts. Past eradication efforts confronted such obstacles towards the tail end of the campaign, when disease incidence was lowest. This article provides a comparison of non-compliance within polio, measles and smallpox campaigns, demonstrating the tendency of vaccine refusal to rise as disease incidence falls. In order to overcome one of the most intractable challenges to eradication, future disease eradication efforts must prioritize vaccine refusal from the start, i.e. ‘walk the last mile first’.

scholarly journals MRI texture feature repeatability and image acquisition factor robustness, a phantom study and in silico study

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Joshua Shur ◽  
Matthew Blackledge ◽  
James D’Arcy ◽  
David J. Collins ◽  
Maria Bali ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
In Silico ◽  
Image Acquisition ◽  
Texture Feature ◽  
Texture Features ◽  
Concordance Correlation Coefficient ◽  
Concordance Correlation ◽  
Simulation Data ◽  
Mri Features

Abstract Purpose To evaluate robustness and repeatability of magnetic resonance imaging (MRI) texture features in water and tissue phantom test-retest study. Materials and methods Separate water and tissue phantoms were imaged twice with the same protocol in a test-retest experiment using a 1.5-T scanner. Protocols were acquired to favour signal-to-noise ratio and resolution. Forty-six features including first order statistics and second-order texture features were extracted, and repeatability was assessed by calculating the concordance correlation coefficient. Separately, base image noise and resolution were manipulated in an in silico experiment, and robustness of features was calculated by assessing percentage coefficient of variation and linear correlation of features with noise and resolution. These simulation data were compared with the acquired data. Features were classified by their degree (high, intermediate, or low) of robustness and repeatability. Results Eighty percent of the MRI features were repeatable (concordance correlation coefficient > 0.9) in the phantom test-retest experiment. The majority (approximately 90%) demonstrated a strong or intermediate correlation with image acquisition parameter, and 19/46 (41%) and 13/46 (28%) of features were highly robust to noise and resolution, respectively (coefficient of variation < 5%). Agreement between the acquired and simulation data varied, with the range of agreement within feature classes between 11 and 92%. Conclusion Most MRI features were repeatable in a phantom test-retest study. This phantom data may serve as a lower limit of feature MRI repeatability. Robustness of features varies with acquisition parameter, and appropriate features can be selected for clinical validation studies.

scholarly journals AB0798 IS THERE A REPRODUCIBILITY OF THE HISTOGRAM AND GRAY SCALE IN ECOEXTRUCTURAL DAMAGES IN RHEUMATOTOLOGICAL DISEASES?

2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 1423.2-1424
Author(s):  
J. A. Mendonça ◽  
I. Siste de Almeida Aoki ◽  
C. C. Cavuto ◽  
V. A. Leandro-Merhi ◽  
J. L. B. D. Aquino
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Rheumatic Diseases ◽  
Femoral Condyle ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Concordance Correlation Coefficient ◽  
Image Method ◽  
Concordance Correlation ◽  
Gray Scale

Background:The gray scale (GS) in high resolution ultrasound is already well validated for use in rheumatological diseases, but the color map or the histogram, can be considered a new proposal, to better define and complement the echotextural damages detection1.Objectives:To calculate the lesions area measures reproducibility index in arthropathies, between 3 blind evaluators and correlate these measures using the GS and the histogram.Methods:Observational and retrospective study approved by the ethics committee of the Pontifical Catholic University of Campinas, with the opinion number: 1.526.307. A total of 29 patients have been assessed (31% males and 69% females) on period 2014 to 2019 in Rheumatology service. A MyLab 50 -Esaote equipment was used with frequency transducer that ranged between 6.0 and 18.0 MHz, 10 different area measures were performed from each recorded images previously, by the GS and the histogram. Statistical analysis: Spearman’s correlation coefficients, Lin’s concordance coefficient (CCC) and the intraclass correlation coefficient (ICC) and their respective 95% confidence intervals, with the SPSS software package for Windows v. 17.0 (SPSS Inc., Chicago, IL, USA).Results:Average age 43.5 ± 21.5 years of age; with disease duration that varied between ≤ 1 month (48.3%) and ≥36 months (24.1%); with the following diseases: juvenile idiopathic arthritis (17.24%); osteoarthritis (13.79%); psoriatic arthritis (13.79%); undifferentiated spondyloarthritis (3.44%); gout (20.68%); rheumatoid arthritis (27.58%) and reactive arthritis (3.44%). A total of 840 measures of exudative (27.58%), proliferative (27.58%) and snowstorm appearance (6.89%) synovitis were performed; femoral-condyle cartilage (3.44%); synovial cyst (3.44%); paratendinitis (6.89%); calcification (3.44%); nail enthesitis (3.44%); tenosynovitis (6.89%) and tophi (10.34%) (Figure 1). The concordance correlation coefficient showed values closer to 1; p <0.001, the intraclass correlation coefficients with excellent reproducibility (ICC ≥ 0.75); p <0.001, always in relation to the three evaluators (Table 1) and the Spearman correlation between the GS and the histogram ranged from rs = 0.665 to rs = 1,000; p <0.001.Conclusion:The histogram can be considered an image method to better identify echotextural damages.References:[1]Mendonça J, Provenza J, Guissa V, et al AB1059 2D Histogram Ultrasound and 3D Ultrasound Correlation in Rheumatic Diseases Annals of the Rheumatic Diseases 2015; 74:1253-1254.Table 1.Concordance Correlation Coefficient (CCC) and Intraclass Correlation Coefficient (ICC):EvaluatorsGS - CCC(IC 95%)p-valorHistogram (IC 95%)p-valor1 e 20,998(0,994-0,999)<0,0010,999(0,995-1,000)<0,0011 e 30,998(0,995-0,999)<0,0010,999(0,995-1,000)<0,0012 e 30,992(0,980-0,997)<0,010,996(0,979-0,999)<0,01Standard by US 2DICCp-valorGS0,997(0,992-0,999)<0,001Histogram0,998(0,992-0,999)<0,001Legends: Gray Scale (GS).Figure 1.Patient with gout: A and B: Tophi area measures (star) in right metatarsos and efusion (arrow) by GS (45 mm2) and histogram (39 mm2), respectively.Disclosure of Interests:José Alexandre Mendonça Speakers bureau: Novartis, Janssen, Bristol, UCB, Isabella Siste de Almeida Aoki: None declared, Caique Chagas Cavuto: None declared, Vânia Aparecida Leandro-Merhi: None declared, José Luis Braga de Aquino: None declared

Engagement, inclusion, knowledge sharing, and talent development: is reverse mentoring a panacea to all? Findings from literature review

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sanghamitra Chaudhuri ◽  
Sunyoung Park ◽  
Karen R. Johnson
Keyword(s):  
Literature Review ◽  
Social Exchange ◽  
Social Exchange Theory ◽  
English Summary ◽  
Exchange Theory ◽  
Future Research ◽  
Content Type ◽  
The Past ◽  
Member Exchange ◽  
The Usa

Purpose The purpose of this study is to systematically review the practice of reverse mentoring and draw a timeline of the research over the past two decades. Considering the novelty of this intervention, this paper proposed an agenda for future research on this burgeoning topic. Design/methodology/approach By adopting narrative literature review and Gregory and Denniss’ (2018) four-step process, this paper reviewed 54 studies grounded in conceptual, literature review and empirical research published between 1998 and 2020. Findings The articles included in the literature review on reverse mentoring research were summarized according to journal publications, research methodologies, contextual settings, theoretical framework, purpose and outcomes. Reverse mentoring studies are dominantly published in educational journals using primarily qualitative and conceptual approaches to explore both academic and business contexts within the USA and Europe. Theories frequently used to frame and examine the need of reverse mentoring included social exchange theory and leader-member exchange theory. The fundamental purpose of reverse mentoring research is to transfer knowledge and to bridge the technology divide between intergenerational groups. Reverse mentoring has been used to promote inclusivity between multiple generations in relation to gender, ethnicity and culture. Originality/value As per the knowledge, this is the first-ever comprehensive English summary of reverse mentoring research done in the past two decades. Findings from this research can be used to better understand reverse mentoring research trends and directions.

scholarly journals Share Repurchases: A Literature Review

2016 ◽  
Vol 8 (2) ◽  
pp. 1
Author(s):  
Sarthak Kumar Jena ◽  
Chandra Sekhar Mishra ◽  
Prabina Rajib
Keyword(s):  
Literature Review ◽  
Corporate Finance ◽  
Regulatory Framework ◽  
Earning Management ◽  
Share Repurchases ◽  
Share Repurchase ◽  
Dividend Payment ◽  
Significant Growth ◽  
Alternative Method ◽  
The Usa

<p>Share repurchases evolved as an alternative method of payout and a corporate finance tool in 1950 in the USA. From 1980 to 2000 it has achieved a significant growth as compared to dividend payment by companies. Then, share repurchase is gradually spread to other countries like UK, Canada, etc.  Pertinent to its growing importance, over the years an enormous literature has emerged that deals with many facets of share repurchase. This article classifies and organizes literature in relations to the established hypotheses, determinants affecting share repurchase decisions, the effect of share repurchase on liquidity and earning management around share repurchase. In additions to the above, this article also analyses the regulatory framework of Indian buyback starting from 1998. It gives a brief view of sections of old Companies Act (1956) and new Companies Act (2013) dealing with buyback. This article also provides a snapshot of SEBI buyback regulations, 1998 and also accommodates all the amendments.</p>

A Bayesian Framework for Estimating the Concordance Correlation Coefficient Using Skew-elliptical Distributions

2018 ◽  
Vol 14 (1) ◽  
Author(s):  
Dai Feng ◽  
Richard Baumgartner ◽  
Vladimir Svetnik
Keyword(s):  
Clinical Study ◽  
Missing Data ◽  
Correlation Coefficient ◽  
Real Life ◽  
Bayesian Framework ◽  
Concordance Correlation Coefficient ◽  
Elliptical Distributions ◽  
Concordance Correlation ◽  
Heavy Tailed ◽  
Biomarker Data

Abstract The concordance correlation coefficient (CCC) is a widely used scaled index in the study of agreement. In this article, we propose estimating the CCC by a unified Bayesian framework that can (1) accommodate symmetric or asymmetric and light- or heavy-tailed data; (2) select model from several candidates; and (3) address other issues frequently encountered in practice such as confounding covariates and missing data. The performance of the proposal was studied and demonstrated using simulated as well as real-life biomarker data from a clinical study of an insomnia drug. The implementation of the proposal is accessible through a package in the Comprehensive R Archive Network.

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