Results 31 to 40 of about 7,900,465 (264)

Snow water equivalent dynamics in the Yesil water management basin

open access: yes, 2023
The article presents the snow water equivalent (SWE) dynamics in the Yesil Water Management Basin during 1971-2019. The main research purpose was to study the SWE dynamics, since – being a powerful climate-forming factor – snow cover plays an important ...
Tillakarim Т.А
core   +1 more source

A Simplified Capillary Bundle Model for CO2-Alternating-Water Injection Using an Equivalent Resistance Method

open access: yesGeofluids, 2020
CO2-alternating-water injection is an effective way of enhancing recovery for low-permeability oil reservoirs. The injection process is one of the essential issues that are facing severe challenges because of the low permeability and poor pore space ...
Wendong Wang   +6 more
doaj   +1 more source

A SIMPLIFIED METHOD FOR THE WATER-EQUIVALENT DIAMETER CALCULATION TO ESTIMATE PATIENT DOSE IN CT EXAMINATIONS

open access: yesRadiation Protection Dosimetry, 2018
AbstractWe proposed and evaluated a water-equivalent diameter calculation without using a region of interest (ROI), (Dw,t) and compared it with the results of using a ROI fitted to the patient border (Dw,f). Evaluations were carried out on thoracic and head CT images.
Choirul Anam   +6 more
openaire   +2 more sources

Measurement of Water Equivalent of Snow Cover by the Snow Tubes of Various Diameters

open access: yesJournal of the Japanese Society of Snow and Ice, 1956
For the study of the relation between the weight of snow cover per unit area Measured by a snowtube and the inner diameter of the tube, the authors carried samplings by some snow-tubes of different diameters.When the layer of granular snow existed in the snow cover, there were contraction on the length of the snow core sampled in the snow-tube and the ...
INOUE, R., MIYAZAKI, K., SANBONGI, R.
openaire   +2 more sources

The effect of tube diameter on vertical two-phase flow regimes in small tubes [PDF]

open access: yes, 2006
Flow boiling flow patterns in four circular tubes with internal diameters of 1.10, 2.01, 2.88 and 4.26 mm were investigated in the present project. The experiments were conducted in vertical upward two-phase flow using R134a as the working fluid.
Chen, L, Tian, YS, Karayiannis, TG
core   +1 more source

[OA194] Calculation of the patient size for abdominal radiography in terms of water equivalent diameter

open access: yesPhysica Medica, 2018
Purpose Estimate the patient size, in terms of water equivalent diameter (WED), for conventional abdominal anterior-posterior (AP) radiography by using parameters available in the DICOM-header. Methods The hypothesis of the present project was that the ratio of the incident air-kerma on the patient to the detector air-kerma relates to the patient ...
An Dedulle   +3 more
openaire   +1 more source

Size-Specific Dose Estimate and Effective Dose for Pediatric Computed Tomography

open access: yesJournal of Medical Physics
The purpose of this study is to present the multivariate analysis of the size-specific dose estimate (SSDE) and E in pediatric computed tomography (CT) imaging.
Rukhsar Khan   +3 more
doaj   +1 more source

Impact of Individual Body Shape Factors and Tissue Contents on the Water Equivalent Diameter of Size-specific Dose Estimations in Adult Chest CT

open access: yesCT Lilun yu yingyong yanjiu
Objective: To investigate the impact of individual body size factors and tissue composition on the size-specific dose estimate (SSDEWED) based on water equivalent diameter for adult chest.
Yang JIANG   +7 more
doaj   +1 more source

Enhancing the Efficiency of the Double-Tube Heat Exchanger by Using a Twisted Inner Tube

open access: yesAdvances in Mechanical and Materials Engineering, 2023
This study utilized two double tube-type heat exchangers. The first exchanger employed a smooth inner tube, while the second one utilized a twisted inner tube. The shell was constructed of plastic (PVC), while the tube was made of copper with a length of
Hussein Hayder Mohammed Ali   +1 more
doaj   +1 more source

Floc characteristics of lychee seed (Litchi chinensis) on the coagulation-flocculation process of turbid water [PDF]

open access: yesEPJ Web of Conferences
The quality of water decreases due to high turbidity, requiring an effective treatment method. Lychee seed (Litchi chinensis) is a promising natural biocoagulant. However, information its floc characteristics remains limited. This study aimed to evaluate
Syaharani Putri Akbari Dania   +7 more
doaj   +1 more source

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