Results 21 to 30 of about 174,583 (306)

Quality Analysis of Telemetry Tracking and Command at Ground Stations using the Association Rule Mining Approach

open access: yesJournal of ICT Research and Applications, 2023
LAPAN built several remote ground stations to support the telemetry tracking and command (TTC) system for the LAPAN-A2 and LAPAN-A3 satellites. These remote ground stations are located in Kototabang/KT (West Sumatra), Biak/BK (Papua), Parepare/PR (South
Rizki Permala   +2 more
doaj   +1 more source

A Stochastic Method for Simulating Near‐Field Seismograms: Application to the 2016 Tottori Earthquake

open access: yesEarth and Space Science, 2021
A stochastic finite‐fault approach based on corner frequency (EXSIM) is applied to simulate the Tottori Mw 6.2 earthquake. The parameter κ0 is calculated based on ground motion recordings.
Pengfei Dang   +3 more
doaj   +1 more source

Experimental Study on the Azimuthal-Transmitting Transducer of Acoustic Logging

open access: yesSensors, 2023
Azimuthal acoustic logging can survey the downhole formation more accurately, and the acoustic source is the crucial component of the downhole acoustic logging tool with azimuthal resolution characteristics.
Junqiang Lu, Baiyong Men, Xiaohua Che
doaj   +1 more source

Modeling and Design of Azimuth-Altitude Dual Axis Solar Tracker for Maximum Solar Energy Generation

open access: yesInternational Journal of Renewable Energy Development, 2019
The sun tracking system that lets Parabolic Dish or PV panel orthogonal to the sun radiation during the day, can raise the concentrated sun radiation by up to 40%.
Salem Alaraby Ali Shufat   +2 more
doaj   +1 more source

Exploration of Center of Gravity, Moment of Inertia, and Launch Direction for Putters with Ball Speed Normalizing Face Properties

open access: yesProceedings, 2020
The forgiveness of golf putters is traditionally achieved through weight distribution. Putters are often designed with large footprints, which help to increase the moment of inertia (MOI), but consequently move the center of gravity (CG) farther behind ...
Jacob Lambeth   +2 more
doaj   +1 more source

Pipelined digital SAR azimuth correlator using hybrid FFT-transversal filter [PDF]

open access: yes, 1984
A synthetic aperture radar system (SAR) having a range correlator is provided with a hybrid azimuth correlator which utilizes a block-pipe-lined fast Fourier transform (FFT).
Liu, K. Y., Wu, C.
core   +1 more source

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

open access: yesAdvanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu   +10 more
wiley   +1 more source

Quantifying uncertainties of CO2-oil relative permeability and capillary pressure curves through automatic history matching core flood data

open access: yesJournal of Petroleum Exploration and Production Technology
Relative permeability and capillary pressure curves are essential data for predicting multiphase flow in porous media. Measuring these properties in the lab is very challenging and involves various issues.
Kourosh Khadivi
doaj   +1 more source

IDENTIFICATION OF ELECTROMAGNETIC ULTRA LOW FREQUENCY (ULF) SIGNAL ANOMALIES AS PRECURSORS OF A MAGNITUDE 5 EARTHQUAKE IN THE SULAWESI REGION

open access: yesJurnal Neutrino: Jurnal Fisika dan Aplikasinya
Sulawesi is situated at the intersection of three tectonic plates the Indo-Australian, Eurasian, and Philippine plates. The Palu Koro fault is one of the primary causes of seismic activity in the Sulawesi region, making it vulnerable to earthquakes on ...
Delfira Anggraini   +3 more
doaj   +1 more source

INFLUENCE OF THE SHAPE ON THE BOREHOLE AXIS VALUE AT THE BIT SIDE FORCE AND THE ANGLE OF IT

open access: yesВестник Северо-Кавказского федерального университета, 2022
The article substantiated the importance of considering the actual shape of the borehole axis in the calculation and analysis of the BHA, a method to obtain the corresponding approximate ...
Emil V. Hnychkin, Vladimir V. Fedorenko
doaj  

Home - About - Disclaimer - Privacy