scholarly journals Concentration-based velocity reconstruction in convective Hele–Shaw flows

2020 ◽  
Vol 61 (9) ◽  
Author(s):  
Mobin Alipour ◽  
Marco De Paoli ◽  
Alfredo Soldati
Keyword(s):  
High Resolution ◽  
Velocity Field ◽  
Cost Effective ◽  
Velocity Fields ◽  
Reconstruction Process ◽  
Cost Effective Alternative ◽  
Laser Sources ◽  
Darcy Flows ◽  
Single Snapshot ◽  
Hele Shaw Cell

Abstract We examine the process of convective dissolution in a Hele–Shaw cell. We consider a one-sided configuration and we propose a newly developed method to reconstruct the velocity field from concentration measurements. The great advantage of this Concentration-based Velocity Reconstruction (CVR) method consists of providing both concentration and velocity fields with a single snapshot of the experiment recorded in high resolution. We benchmark our method vis–à–vis against numerical simulations in the instance of Darcy flows, and we also include dispersive effects to the reconstruction process of non-Darcy flows. The absence of laser sources and the presence of one low-speed camera make this method a safe, accurate, and cost-effective alternative to classical PIV/PTV velocimetry processes. Finally, as an example of possible application, we employ the CVR method to analyse the tip splitting phenomena. Graphic abstract

scholarly journals Chromospheric Velocity Fields Diagnostics from CaII and MgII Emission Profiles

1988 ◽  
Vol 132 ◽  
pp. 283-285
Author(s):  
G. Vladilo ◽  
L. Crivellari ◽  
F. Castelli ◽  
J. E. Beckman ◽  
B. H. Foing
Keyword(s):  
High Resolution ◽  
Velocity Field ◽  
Velocity Fields

We discuss the present limits to the velocity field diagnostics in stellar chromospheres achievable with ESO CAT+CES and IUE high resolution spectra.

scholarly journals Web-based Tool for Diagnosing Cucurbit Disorders

HortScience ◽  
1998 ◽  
Vol 33 (4) ◽  
pp. 597c-597
Author(s):  
Dan Lineberger ◽  
Frank Dainello ◽  
John Jackman ◽  
Marvin Miller
Keyword(s):  
High Resolution ◽  
Cost Effective ◽  
Web Based ◽  
The World ◽  
Full Screen ◽  
Cost Effective Alternative ◽  
Text Information ◽  
And Control ◽  
Common Plant ◽  
Final Selection

Plant problems often are diagnosed by comparing the problem in hand to a set of color photographs of known symptoms. Color photographs are expensive and time consuming to publish and distribution of books and pamphlets is costly. Delivery of high resolution color photographs of common plant disorders via the World Wide Web is a cost-effective alternative. A web-based diagnostic resource has been created to assist problem identification of cucurbit disorders including nutritional, disease, and insect problems. The diagnostic tool consists of arrays of high resolution, color images grouped by similarity of appearance. The image arrays are clickable image maps, and the user is provided with increasingly detailed information and larger images as images are selected. At the final selection, the user is presented with a full screen image and text information describing the identity and control recommendations for the problem illustrated. This tool is intended to allow experienced diagnosticians to confirm a problem diagnosis, and to aid less experienced individuals in making proper diagnoses.

scholarly journals Synthetic 3D Recording of a Shipwreck Embedded in Seafloor Sediments: Distinguishing Internal Details

Heritage ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 541-553
Author(s):  
Lars O. Boldreel ◽  
Ole Grøn ◽  
Deborah Cvikel
Keyword(s):  
High Resolution ◽  
Cost Effective ◽  
Weather Conditions ◽  
Effective Alternative ◽  
3D Image ◽  
Experimental Basis ◽  
Dense Grid ◽  
Cost Effective Alternative ◽  
Seafloor Sediments ◽  
Harbour Area

3D recording of shipwrecks completely buried in seafloor sediments has great potential as an important aspect of maritime archaeological surveys and management. Buried shipwrecks have been recorded directly with seismic 3D Chirp sub-bottom profilers on an experimental basis. This method is, however, expensive, time-consuming and complicated. This article outlines the application of a faster, cheaper, and less complicated method of synthetic 3D recording, which is also less sensitive to weather conditions. It involves the acquisition of a larger number of seismic 2D high-resolution sub-bottom profiles in a dense grid that does not need to be regular. The method is based on the results of survey work conducted in the Akko Harbour area, on the Carmel coast of Israel, which shows that the shape of the hull of a shipwreck can be precisely determined, and that the sedimentary units bounding it can be outlined and interpreted. Based on an interpretation of the shape of the hull, the depth of the structure was measured, and a 3D image of the shipwreck was subsequently generated. Samples of the sub-seafloor were obtained across the area, and the sample located within the area of the mapped shipwreck was found to contain wood fragments and a piece of rope. This article demonstrates that 2D surveying is a viable and cost-effective alternative to 3D surveying that is able to produce good results.

scholarly journals Genetic species identification of ecologically important planthoppers (Prokelisia spp.) of coastal Spartina saltmarshes using High Resolution Melting Analysis (HRMA)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
G. Janelle Espinoza ◽  
Jaime R. Alvarado Bremer
Keyword(s):  
High Resolution ◽  
High Resolution Melting ◽  
Cost Effective ◽  
Sympatric Species ◽  
High Resolution Melting Analysis ◽  
Individual Species ◽  
Base Pairs ◽  
Melting Temperatures ◽  
Melting Analysis ◽  
Cost Effective Alternative

AbstractPhloem-feeding planthoppers of the genus Prokelisia rank among the most abundant and ecologically important browsers of coastal saltmarsh grasses of eastern North America and the Caribbean. Along the Spartina marshes of the northern Gulf of Mexico, the sympatric species P. marginata and P. dolus are the most abundant, but are difficult to distinguish from each other based solely on morphology. This study seeks to design a molecular assay based on High Resolution Melting Analysis (HRMA) as a fast, cost-effective alternative to differentiate these species. A 450 base pairs (bp) segment of cytochrome c oxidase subunit I (COI) was amplified and sequenced for representative samples of both species, and a short amplicon (SA) HRMA was designed based on the presence of fixed nucleotide differences between species found along a 60 bp segment of COI. The unambiguous identification of individual specimens of P. marginata or P. dolus was possible due to easily discernable differences in the melting temperatures of the two species along this mini barcode. This assay may prove useful for future genetic studies involving these species by preventing the overestimation of genetic diversity via inclusion of conspecifics, and in ecological studies by improving data on the effects of individual species of Prokelisia.

scholarly journals A modified protocol of Capture-C allows affordable and flexible high-resolution promoter interactome analysis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Arkadiy K. Golov ◽  
Dmitrii A. Abashkin ◽  
Nikolay V. Kondratyev ◽  
Sergey V. Razin ◽  
Alexey A. Gavrilov ◽  
...  
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Cost Effective ◽  
Probe Design ◽  
Functional Link ◽  
Chromosome Conformation ◽  
Transcription Start Sites ◽  
Relative Closeness ◽  
Cost Effective Alternative ◽  
Regulatory Sites

Abstract Large-scale epigenomic projects have mapped hundreds of thousands of potential regulatory sites in the human genome, but only a small proportion of these elements are proximal to transcription start sites. It is believed that the majority of these sequences are remote promoter-activating genomic sites scattered within several hundreds of kilobases from their cognate promoters and referred to as enhancers. It is still unclear what principles, aside from relative closeness in the linear genome, determine which promoter(s) is controlled by a given enhancer; however, this understanding is of great fundamental and clinical relevance. In recent years, C-methods (chromosome conformation capture-based methods) have become a powerful tool for the identification of enhancer–promoter spatial contacts that, in most cases, reflect their functional link. Here, we describe a new hybridisation-based promoter Capture-C protocol that makes use of biotinylated dsDNA probes generated by PCR from a custom pool of long oligonucleotides. The described protocol allows high-resolution promoter interactome description, providing a flexible and cost-effective alternative to the existing promoter Capture-C modifications. Based on the obtained data, we propose several tips on probe design that could potentially improve the results of future experiments.

Upscaling, Computational Aspects, and Statistics of the Velocity Field

2003 ◽  
Author(s):  
Yoram Rubin
Keyword(s):  
High Resolution ◽  
Velocity Field ◽  
Heterogeneous Media ◽  
Effective Properties ◽  
Computational Effort ◽  
Velocity Fields ◽  
Level Of Detail ◽  
Small Scale ◽  
Scale Heterogeneity ◽  
Computationally Intensive

This chapter deals with computing the velocity fields in heterogeneous media. This is a broad area, and we shall concentrate here on upscaling, on the spatial correlation pattern of the velocity, and on accuracy measures for techniques that compute velocity fields. Numerical simulations of velocity fields in heterogeneous media (Ababou et al., 1988, 1989; Bellin et al., 1992, 1994; Bellin and Rubin, 1996; Dykaar and Kitandis, 1992a,b; Hassan et al., 1998a,b; Salandin and Fiorotto, 1998) indicate that to capture accurately the effects of the spatial variability of the conductivity on the velocity field, the conductivity field should be modeled with high resolution. Techniques for generating highly detailed realizations of rock properties were reviewed earlier. Because of the huge level of detail included in these realizations, large-scale flow simulations can become computationally intensive. However, the need for fine detail varies over the aquifer. For example, a high level of detail is needed where the velocity field may vary rapidly, such as near wells, or over areas traversed by a contaminant plume, or for describing small-scale features which dominate the flow, such as high-conductivity channels. Coarsening the grid over areas where high resolution is unnecessary can reduce the computational effort. To be able to do that, a procedure is needed for assigning properties such as conductivity on a coarser scale which is more appropriate for simulation, while avoiding the loss of important details. Such a procedure is called upscaling (also scale-up). Upscaling assigns properties to blocks based on subgrid-scale heterogeneity. Upscaling leads to block-effective properties. Unlike effective properties, block-effective properties depend on the size of the block. In the limit of block dimensions much larger than the integral scale of the heterogeneity, the block-effective properties become equal to the media's effective properties. Unlike the case of effective conductivities, there is no consensus about the definition of block conductivity. For example, Rubin and Gomez-Hernandez (1990) defined the block conductivity as the coefficient of proportionality between the block-averaged flux and the gradient. Indelman and Dagan (1993a, b) stipulated that the block-effective conductivity should dissipate energy at a rate equal to the dissipation due to the small-scale heterogeneity.

Transoral Teflon Injection under Flexible Laryngovideostroboscopy for Unilateral Vocal Fold Paralysis

1997 ◽  
Vol 106 (9) ◽  
pp. 783-786 ◽  
Author(s):  
Pen-Yuan Chu ◽  
Shyue-Yih Chang
Keyword(s):  
High Resolution ◽  
Direct Laryngoscopy ◽  
Vocal Fold ◽  
Cost Effective ◽  
Vocal Fold Paralysis ◽  
Indirect Laryngoscopy ◽  
Unilateral Vocal Fold Paralysis ◽  
Outpatient Procedure ◽  
Vocal Fold Vibration ◽  
Cost Effective Alternative

Intracordal Teflon injection is a widely accepted method for the treatment of glottic incompetence due to unilateral vocal fold paralysis. It can be performed transorally via direct or indirect laryngoscopy, as well as transcutaneously under laryngovideoscopy. However, these procedures still have their disadvantages. The technique we introduce is to perform the procedure transorally while using a curved injection needle under flexible laryngovideostroboscopic monitoring. With topical anesthesia, the patient can phonate naturally during the procedure. The surgeon can visualize the needle and injection site clearly under high-resolution flexible laryngovideostroboscopy. Stroboscopic examination during surgery enables the surgeon to monitor the improvement of vocal fold vibration. Twenty consecutive patients treated with this technique were studied. The preliminary results are satisfactory. The technique we introduce is an outpatient procedure with high applicability and low morbidity. This technique is a good, cost-effective alternative to standard operative direct laryngoscopy with injection.

2D Color-Intensity Representation of Ultrasonic Thickness Gauge Measurements

2020 ◽  
pp. 1192-1198
Author(s):  
M.S. Mohammad ◽  
Tibebe Tesfaye ◽  
Kim Ki-Seong
Keyword(s):  
Cost Effective ◽  
The Other ◽  
Thickness Gauge ◽  
Color Intensity ◽  
Digital Readout ◽  
Flat Surfaces ◽  
Video Cameras ◽  
Wide Range ◽  
Cost Effective Alternative ◽  
Ultrasonic Thickness

Ultrasonic thickness gauges are easy to operate and reliable, and can be used to measure a wide range of thicknesses and inspect all engineering materials. Supplementing the simple ultrasonic thickness gauges that present results in either a digital readout or as an A-scan with systems that enable correlating the measured values to their positions on the inspected surface to produce a two-dimensional (2D) thickness representation can extend their benefits and provide a cost-effective alternative to expensive advanced C-scan machines. In previous work, the authors introduced a system for the positioning and mapping of the values measured by the ultrasonic thickness gauges and flaw detectors (Tesfaye et al. 2019). The system is an alternative to the systems that use mechanical scanners, encoders, and sophisticated UT machines. It used a camera to record the probe’s movement and a projected laser grid obtained by a laser pattern generator to locate the probe on the inspected surface. In this paper, a novel system is proposed to be applied to flat surfaces, in addition to overcoming the other limitations posed due to the use of the laser projection. The proposed system uses two video cameras, one to monitor the probe’s movement on the inspected surface and the other to capture the corresponding digital readout of the thickness gauge. The acquired images of the probe’s position and thickness gauge readout are processed to plot the measured data in a 2D color-coded map. The system is meant to be simpler and more effective than the previous development.

JS777

Alloy Digest ◽  
1980 ◽  
Vol 29 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Cost Effective ◽  
Heat Treating ◽  
Steel Company ◽  
High Alloy ◽  
Cost Effective Alternative ◽  
Resistance To Stress ◽  
Nickel Base

Abstract JS777 is a high-alloy, fully austenitic stainless steel developed for applications where corrosive conditions are too severe for the standard grades of stainless steel. It also provides a cost-effective alternative to more expensive nickel-base and titanium-base alloys. It has relatively high resistance to stress-corrosion cracking and to intergranular corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-377. Producer or source: Jessop Steel Company.

ANCORSTEEL 4300

Alloy Digest ◽  
2009 ◽  
Vol 58 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cost Effective ◽  
Heat Treating ◽  
Effective Alternative ◽  
Powder Metal ◽  
Secondary Processing ◽  
Cost Effective Alternative

Abstract Ancorsteel 4300 alloy ferrous powder simulates wrought steel compositions and is a cost-effective alternative to alloys requiring secondary processing. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on heat treating and powder metal forms. Filing Code: SA-611. Producer or source: Hoeganaes Corporation.

Sign in / Sign up

Export Citation Format

Share Document