HingeInflex: a MATLAB-based method for precise selection of the hinge and the inflection points in folds

2009 ◽  
Vol 147 (2) ◽  
pp. 233-241 ◽  
Author(s):  
DEEPAK C. SRIVASTAVA ◽  
VIPUL RASTOGI
Keyword(s):  
Precise Determination ◽  
Visual Selection ◽  
Interpolation Algorithm ◽  
Polynomial Curve ◽  
Inflection Points ◽  
User Friendly ◽  
Selection Of

AbstractSubjectivity in visual selection of hinge and inflection points leads to significant errors in analyses of fold shapes in profile sections. This article gives a method for precise determination of these points. The method: (1) imports a fold image into Matlab, (2) digitizes points on the image, (3) increases the number of available points by using an interpolation algorithm, (4) fits a polynomial curve to the points, and (5) searches for the hinge and the inflection points mathematically. Tests on several folds confirm that the ‘HingeInflex’ is a rapid, robust and user-friendly method for precise selection of the hinge and inflection points.

DISTANCE MEASUREMENTS USING FREQUENCY STABILIZED Nd:YAG LASERS

1996 ◽  
Vol 05 (03) ◽  
pp. 543-550
Author(s):  
VERED MAHAL ◽  
ADY ARIE
Keyword(s):  
Frequency Stability ◽  
Precise Determination ◽  
Phase Shifting ◽  
Distance Measurements ◽  
Fringe Contrast ◽  
Nd:Yag Lasers ◽  
Wide Range ◽  
Diode Pumped ◽  
Selection Of

Two diode-pumped tunable Nd:YAG lasers locked to sub-Doppler transitions of 127I2 and 133 Cs 2 are used as a source for two-wavelength interferometry. The synthetic wavelength, Λ=c/∆ν, is highly stable and accurate, owing to the frequency stability of the locked lasers and the precise determination of the frequency difference Δν between Cs 2 and I 2 transitions. The dense spectra of these molecules allows selection of Λ over a wide range, between 8.5 mm and several meters, thus enabling distance measurements with a large non-ambiguity range. Fringe contrast and phase-shifting methods are used to measure the phase difference. An accuracy of 70 μm is achieved for Λ~19 mm, i.e. Λ/260.

scholarly journals Non-redundant Spherical Near-Field to Far-Field Transformation for a Volumetric Antenna in Offset Configuration

2019 ◽  
Vol 13 (1) ◽  
pp. 19-29 ◽  
Author(s):  
Francesco D’Agostino ◽  
Flaminio Ferrara ◽  
Claudio Gennarelli ◽  
Rocco Guerriero ◽  
Massimo Migliozzi
Keyword(s):  
Near Field ◽  
Measurement Techniques ◽  
Data Gathering ◽  
Experimental Tests ◽  
Precise Determination ◽  
Far Field ◽  
Interpolation Algorithm ◽  
Classical Technique ◽  
Field Transformation

Background: The development of fast Near-Field (NF) measurement techniques allowing the precise determination of the Far-Field (FF) radiation features of an antenna is becoming more and more challenging nowadays. Objective: The goal of the article is the development of an NF To FF Transformation (NFTFFT) with spherical scan for offset mounted volumetric Antennas Under Tests (AUTs) requiring, unlike the classical technique, a reduced set of NF data, that is of the same amount as for the onset mounting case, thus making data gathering faster. In fact, the number of NF data needed by the standard approach may considerably increase in this case, since the size of the smallest sphere surrounding the AUT and centered at the center of the measurement sphere rises. Methods: This goal has been achieved by profitably exploiting the non-redundant sampling representation of electromagnetic field and assuming a volumetric AUT as contained in a sphere. An optimal sampling interpolation algorithm is then employed to precisely reconstruct the input NF data for the traditional spherical NFTFFT from the reduced set of the collected ones. Conclusion: The numerical simulations and experimental tests demonstrate the effectiveness of the developed approach accounting for an offset mounting of the AUT.

scholarly journals Specifics of Determination of Human Biological Age by Blood Samples Using Epigenetic Markers

2021 ◽  
Author(s):  
Viachaslau Kipen ◽  
Maryna Bahdanava ◽  
Aryna Burakova ◽  
Olga Dobysh ◽  
Olga Zotova ◽  
...  
Keyword(s):  
Chronic Diseases ◽  
Information Content ◽  
Critical Role ◽  
Healthy Person ◽  
Test System ◽  
Precise Determination ◽  
Biological Age ◽  
Genome Wide ◽  
Selection Of

Abstract Our research focused on the selection of already known markers, as well as the search for other infonormative markers based on data made publicly available on the GEO NCBI platform (genome-wide DNA methylation projects using the Infinium Human Methylation 450K BeadChip (Illumina ©)). The main objective of the study was to demonstrate that the accuracy of determining the biological age of a person in the presence of chronic diseases using linear-dependent methylation markers is comparable to the accuracy of determining the biological age of a healthy person. Criminologists, as a rule, do not have information about the chronic diseases of a person who has left a biological trace at the scene (blood, for example). However, the lack of this information, as we have shown for a some of diseases, does not play a critical role in the precise determination of biological age. Additionally, an obstacle was removed when transferring the information content of markers from Infinium Human Methylation 450K BeadChip chips to SNaPshot technology. The analysis was carried out on a sample of 236 Belarusians, for whom the methylation profile for 7 Cpg markers is presented. It is shown that the information content of markers is preserved Our analysis shows the possibility of creating the universal test system for predicting biological age according to marker methylation. The system can be used in the work of the most criminalist in the world with the same task.

scholarly journals The Development of a Quantitative RCM/MSG Application using Microsoft Office

AVIA ◽  
2021 ◽  
Vol 2 (2) ◽  
Author(s):  
R Sianturi ◽  
E Suwondo
Keyword(s):  
Low Cost ◽  
Application Development ◽  
Microsoft Excel ◽  
Academic Field ◽  
Microsoft Access ◽  
Microsoft Office ◽  
User Friendly ◽  
The Relationship ◽  
Selection Of

The number of small to medium scale industries makes the development of a low cost and easy to use application to support maintenance programs development is necessary. Besides for industries, the developed application can be used also in the academic field for research. For cost reasons, the application is developed using Microsoft Access and Microsoft Excel. The development of the application is carried out in three steps, i.e. the determination of application specifications, the programming in Microsoft Access and Microsoft Excel, and the validation and user-friendly test. The application is developed by considering the relationship between the risk quantification of a failure effect and the selection of a maintenance task and its interval. The effectiveness assessments are based on the failure risk reduction up to an acceptable level. The developed application is named "Quantitative RCM/MSG". The application can conduct a database management according to the steps of the RCM/MSG method. The application can determine the required maintenance tasks and intervals for the category of evident and hidden failure effects by taking the safety and financial aspects into account. This application does its functions correctly and easy to use. For further application development, application can be developed using series and combination systems. Application with module redesign on default action

scholarly journals Evaluation of the Quality of Conical Picks and the Possibility of Predicting the Costs of Their Use

2020 ◽  
Vol 3 (1) ◽  
pp. 491-504
Author(s):  
Krzysztof Krauze ◽  
Kamil Mucha ◽  
Tomasz Wydro
Keyword(s):  
Wear Rate ◽  
Precise Determination ◽  
Unit Price ◽  
Conical Pick ◽  
Pick Body ◽  
Rate Intensity ◽  
Conical Picks ◽  
Selection Of

AbstractCurrently, the user’s choice of a conical pick involves specifying its geometric and material parameters, taking into account the place and conditions of its work. The selection is then made, usually on the basis of solely one criterion, which is the price. Thus, at the stage of both purchase and operation, the quality of picks and their suitability for a specific machine and the processed mineral are not assessed. Therefore, a method was developed to enable conducting tests that determine the geometric parameters of a pick, the types of materials of the pick body and WC insert as well as the pick wear rate (intensity) in a laboratory workstation. The wear rate (intensity) is described by the C2 index – the smaller is its value, the slower is the pick’s wear. The C2 index has been used to forecast the wear of picks and to determine their unit price and operating costs. This allows for precise determination of investment requirements and a proper selection of the pick.

DETERMINING THE DESALINATION UNIT COMPOSITION FOR COSTAL AREAS AND SMALL ISLANDS USE ANALYTIC HIERARCHY PROCESS

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Imam Setiadi ◽  
Dinda Rita K. Hartaja
Keyword(s):  
Analytic Hierarchy Process ◽  
Energy Demand ◽  
Pairwise Comparison ◽  
Small Islands ◽  
Ahp Method ◽  
Analytic Hierarchy ◽  
Comparison Research ◽  
Hierarchy Process ◽  
Selection Of

Selection of the appropriate composition desalination units can be done with a variety of method approaches, one of the method is the Analytic Hierarchy Process. In determining the desalination unit with AHP method to consider is setting a goal, an alternative criteria and pairwise comparison. Research for the determination of the exact composition of the desalination unit in order to achieve sustainable drinking water suppy in coastal areas and small islands has been conducted. The results of the study are as follows, the energy demand of 50.83%, operator costs of 26.64%, maintenance costs of 14.13% and chemical requirement 8.4%. For an alternative composition desalination unit of RO 10 m3 / day is the best alternative composition with value of 59.61%, the composition of the next alternative is RO 20 m3/ day of 30.40% and the last alternative of the desalination unit composition is RO 120 m3/ day of 09.99%.Key words : Desalination, Mukti Stage Flash Composition, AHP

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