Canal Flare Index in the Canine Femur Is Influenced by the Measurement Method

2020 ◽  
Vol 33 (03) ◽  
pp. 198-204
Author(s):  
Figen Sevil-Kilimci ◽  
Mehmet E. Kara
Keyword(s):  
Preoperative Planning ◽  
Calculation Methods ◽  
Medial Aspect ◽  
Limits Of Agreement ◽  
Radiographic Images ◽  
Lesser Trochanter ◽  
Stem Type ◽  
Flare Index ◽  
Width Measurements ◽  
Selection Of

Abstract Objectives We evaluated whether differences exist among the canal flare index (CFI) values obtained by different calculation methods in the veterinary literature. Study Design The endosteal widths were measured from radiographic images of canine cadaveric femora. Three different formulae were used to calculate the CFI. The CFILT-M was the ratio of endosteal width at the medial aspect of the lesser trochanter (LT) to the midshaft (M), while the CFILT-I was the ratio of LT to the isthmus (I). The CFIPLT-I was the ratio of endosteal width at the proximal aspect of the lesser trochanter (PLT) and the I. The widths at each level and the CFI calculation methods were compared. Using Rashmir–Raven's method, the femora were typed as stovepipe, normal and champagne fluted. The limits of agreement were also evaluated. Results The endosteal width at the proximal aspect of the lesser trochanter was 12% wider than at the medial aspect and 8% wider at the midshaft than at the isthmus. The CFILT-M was less than CFILT-I and CFIPLT-I by 9 and 20%, respectively. By Rashmir–Raven's classification, the CFILT-M method provided 18% stovepipe, 79% normal and 3% champagne fluted femora. The CFILT-I method showed the stovepipe, the normal and the champagne fluted as 6, 82 and 12%, respectively. The CFIPLT-I method classified the femora either normal (55%) or champagne fluted (45%). The comparison of CFILT-M with the other methods using Bland–Altman analysis showed lower mean difference for the CFILT-I than the CFIPLT-I. Conclusion The level of width measurements at proximal femora might have an impact on the CFI values, likewise, preoperative planning procedures and the selection of a stem type in total hip arthroplasty.

scholarly journals Chest X-ray image classification for viral pneumonia and Сovid-19 using neural networks

2021 ◽  
Vol 45 (1) ◽  
pp. 149-153
Author(s):  
V.G. Efremtsev ◽  
N.G. Efremtsev ◽  
E.P. Teterin ◽  
P.E. Teterin ◽  
E.S. Bazavluk
Keyword(s):  
Neural Networks ◽  
Predictive Ability ◽  
Diagnostic Methods ◽  
Third Party ◽  
Image Brightness ◽  
Radiographic Images ◽  
X Ray ◽  
Complex Models ◽  
Chest X Ray ◽  
Selection Of

The use of neural networks to detect differences in radiographic images of patients with pneu-monia and COVID-19 is demonstrated. For the optimal selection of resize and neural network ar-chitecture parameters, hyperparameters, and adaptive image brightness adjustment, precision, recall, and f1-score metrics are used. The high values of these metrics of classification quality (> 0.91) strongly indicate a reliable difference between radiographic images of patients with pneumonia and patients with COVID-19, which opens up the possibility of creating a model with good predictive ability without involving ready-to-use complex models and without pre-training on third-party data, which is promising for the development of sensitive and reliable COVID-19 express-diagnostic methods.

scholarly journals Evaluation of ACE inhibitors lipophilicity using in silico and chromatographically obtained hydrophobicity parameters

2013 ◽  
Vol 67 (2) ◽  
pp. 209-216 ◽  
Author(s):  
Jadranka Odovic ◽  
Bojan Markovic ◽  
Jasna Trbojevic-Stankovic ◽  
Sote Vladimirov ◽  
Katarina Karljikovic-Rajic
Keyword(s):  
Ace Inhibitors ◽  
High Throughput Screening ◽  
Partition Coefficients ◽  
Relevant Literature ◽  
Reversed Phase ◽  
Careful Selection ◽  
Calculation Methods ◽  
Layer Chromatography ◽  
Linear Regressions ◽  
Selection Of

The aim of this study was to compare different calculation methods to determine lipophilicity, expressed as logP value, of seven ACE inhibitors (enalapril, quinapril, fosinopril, lisinopril, cilazapril, ramipril, and benazapril) with significantly different structure. Experimentally determined n-octanol/water partition coefficients, logPO/W values, were obtained from relevant literature. The correlations between all collected logP values were studied and the best agreements between calculated logP and experimentally determined logPO/W values, were observed for KOWWINlogP or MilogP values (r = 0.999 or r = 0.974, respectively). The correlations between all collected logP values and chromatographically (reversed-phase thin-layer chromatography) obtained hydrophobicity parameters, RM0 and C0, were established. The good correlations (r > 0.90) were obtained in the majority of relationships. The KOWWINlogP was established as the most suitable hydrophobicity parameter of investigated group of ACE inhibitors with r = 0.981 for correlation with RM0 and r = 0.977 for correlation with C0 parameters (water-methanol mobile phase). Using multiple linear regressions, it was established that application of two selected logP, calculated by different mathematical approaches, led to very good correlation due to the benefits of both calculation methods. The good relationships indicate that the computed logP, with careful selection of method calculation, can be useful in ACE inhibitors lipophilicity evaluation, as high-throughput screening technique.

scholarly journals Convective phenomena forecasting based on output data of numerical models available in the Hydrometeorological Centre of the Republic of Belarus

2017 ◽  
pp. 57-64
Author(s):  
M. I. Prokharenya
Keyword(s):  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Numerical Models ◽  
Calculation Methods ◽  
Output Data ◽  
Model Calculations ◽  
Convective Processes ◽  
The Republic ◽  
Radar Satellite ◽  
Selection Of

In the article you can read about the methods used for forecasting convective processes by means of output products of numerical models with various spatial resolution. It presents the methods for forecasting convective phenomena applied in the Hydrometeorological Centre of the Republic of Belarus. The state of the atmosphere affected by intensive convection over the territory of the Republic of Belarus on July 13, 2016 is analyzed. The categorial evaluation of the thunderstorm forecasting methods by G.D. Reshetov and I.A. Slavin is specified with the respective results presented. The article analyzes the forecast of convective phenomena conducted with the help of the non-hydrostatic regional model WRF-ARW. Use of convective instability indices and calculation methods can facilitate convective phenomena forecasting. The advantage of their use consists in possibility of their application within the areas not covered by aerological sounding. However, selection of indicators of instability and methods of thunderstorm and other dangerous phenomena forecasting depends on features of an area under study and this requires further research. To ensure more accurate convective phenomena forecasting it is necessary to consider radar, satellite and aerological observations when conducting numerical model calculations. The results of the research showed that convective phenomena forecasting requires use of models with a high spatial resolution.

Comparison of the Methods for Calculating Instant Depth of Cut

2013 ◽  
Vol 634-638 ◽  
pp. 3313-3320 ◽  
Author(s):  
Yong Sun ◽  
X.S. Li
Keyword(s):  
Theoretical Analysis ◽  
Calculation Method ◽  
Approximate Formula ◽  
Accurate Solution ◽  
Mining Machine ◽  
Depth Of Cut ◽  
Calculation Methods ◽  
Continuous Mining ◽  
Selection Of ◽  
Advance Speed

When cutting rocks using mechanical excavators, the depth of cut (DOC) of cutting picks is a major factor that affects the forces on the picks and the drum on which the picks are installed. To optimize the design of the picks and the drum, as well as the operation of the continuous mining machine, it is necessary to analyze the DOC of individual picks accurately. In a cutting cycle, different picks can be in various positions and consequently have diverse DOCs which are termed the instant DOCs at the corresponding positions. In this study, it is aimed to investigate both accurate solution and approximate formula for the calculation of instant DOC. Based on theoretical analysis, the equations for the calculation of instant DOC have been developed, and the quantitative comparisons between the different DOC calculation methods have been made. The influence of the advance speed per revolution of the drum on the instant DOC, the cut interactions between picks and the cutting sections of individual picks have also been investigated. The results can assist in the selection of an appropriate DOC calculation method and improvement of drum design and operation.

On the Structure of Atomic Clusters: Selection of Calculation Methods to Match Mass Spectra

2015 ◽  
Vol 1117 ◽  
pp. 26-30 ◽  
Author(s):  
Andriy Dmytruk
Keyword(s):  
Mass Spectrum ◽  
Chemical Composition ◽  
Mass Spectroscopy ◽  
Structure Determination ◽  
Quantum Chemical ◽  
Mass Spectra ◽  
Atomic Clusters ◽  
Binding Energies ◽  
Calculation Methods ◽  
Selection Of

Studying atomic clusters, their chemical composition can be find by time-of-flight mass spectroscopy even for a miserable quantity of the sample, while their structure determination requires either their production in enough quantity that can be problematic for new substances, or usage of quantum chemical calculations otherwise. However, the result of the calculations depends on the method used. It is suggested in this report to use a correlation between the abundances of the clusters in the mass spectrum and their calculated binding energies as a criterion for selection of an appropriate calculation method. This approach is applied for the case of (ZnO)n and (ZnS)n clusters of n = 12 and 13.

scholarly journals Calculation module of thread connection generator in Inventor

2018 ◽  
Vol 19 (6) ◽  
pp. 573-576
Author(s):  
Andrzej Maciejczyk
Keyword(s):  
Analytical Calculation ◽  
Construction Process ◽  
Calculation Methods ◽  
Thread Connection ◽  
Calculation Module ◽  
Selection Of

The article presented an analysis of the selection of bracket screws using classical, analytical calculation methods and using the Inventor generator. The operation and functionality of the generator calculation module are discussed. Its imperfections, simplifications and perceived errors were pointed out. Its usefulness in the construction process was assessed.

scholarly journals Expression of Ornamental Traits in Container versus Field Plants in a Vitex L. Breeding Program

HortScience ◽  
2010 ◽  
Vol 45 (11) ◽  
pp. 1630-1633 ◽  
Author(s):  
Amanda J. Hershberger ◽  
David A. Knauft ◽  
Carol D. Robacker
Keyword(s):  
Breeding Program ◽  
Flowering Period ◽  
Flower Date ◽  
First Flowering Date ◽  
Width Measurements ◽  
Ornamental Traits ◽  
Initial Selection ◽  
Trait Correlations ◽  
Selection Of ◽  
Inflorescence Length

New ornamental cultivars must display horticultural superiority when grown in containers or in the field. The objectives of this study were to determine whether container or field is most appropriate for initial selection of ornamental traits in a Vitex breeding program by determining whether quantitative traits of breeding interest were expressed similarly in the two environments and by determining trait correlations in each environment. Segregating populations of Vitex and their parents were cloned and grown in containers and in the field. Ornamentally significant traits evaluated included first flower date, last flower date, flowering period, total weeks of flowering, inflorescence number, inflorescence length, flower rating, plant height, plant width, and Cercospora leaf spot resistance. Overall, field-grown plants were taller and wider than plants grown in containers. Field-grown plants also had a later first flowering date, longer flowering period, greater total weeks flowering, longer inflorescence length, larger inflorescence number, and more flowers on the inflorescence. Significant genotype × environment interactions were found for height and width measurements taken 19 and 33 weeks after planting, first flower date, total weeks in flower, inflorescence number, flower rating, and Cercospora rating. Most trait correlations were either non-significant or so low so that selection of these traits would be independent of other traits. High correlations were present in both environments between height measurements taken at 19 weeks and 33 weeks after planting. High correlation in the field and moderate correlation in containers were found between width measurements taken 19 and 33 weeks after planting. Correlation was high between flowering period and first flower date in both the field and container. Correlation between last flower date and flowering period was high in containers and moderate in the field. High correlation was present in both environments between flowering period and total weeks of flowering. Containers were determined to be best for initial selection for most traits having significant genotype × environment effects.

Sign in / Sign up

Export Citation Format

Share Document