Results 21 to 30 of about 15,009,839 (271)
Stem Cell Research & Therapy, 2021 Background Effective stem cell therapy is dependent on the stem cell quality that is determined by their differentiation potential, impairment of which leads to poor engraftment and survival into the target cells.
Smarajit Chakraborty +8 more
doaj +1 more source
Integrated representation for discrete Fourier and wavelet transforms using vector notation
Mehran University Research Journal of Engineering and Technology, 2022 Many mathematical operations are implemented easily through transform domain operations. Multiple transform domain operations are used independently in large and complex applications.
Tariq Javid +3 more
doaj +1 more source
On reference star recognition and identification
Geodesy and Cartography, 2014 The paper deals with a research in the area of automation of positional star observations. In order to fully employ recent progress in imaging technologies, star image recognition and reference star identification process should gain comparable level of ...
Ansis Zariņš +2 more
doaj +1 more source
Klasifikasi Belimbing Menggunakan Naïve Bayes Berdasarkan Fitur Warna RGB
IJCCS (Indonesian Journal of Computing and Cybernetics Systems), 2017 Post harvest issues on star fruit are produced on a large scale or industry is sorting. Currently, star fruit classified by rind color analysis visually human eye. This method does not effective and inefficient.
Fuzy Yustika Manik, Kana Saputra Saragih
doaj +1 more source
RESEARCH ON MULTI-SOURCE SATELLITE IMAGE DATABASE MANAGEMENT SYSTEM [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020 For the exploration and analysis of electricity, it is necessary to continuously acquire multi-star source, multi-temporal, multi-level remote sensing images for analysis and interpretation.
N. Fu +4 more
doaj +1 more source
A Factor Graph Approach for Attitude Estimation of Spacecraft Using a Stellar Gyroscope
IEEE Access, 2019 A stellar gyroscope is an attitude sensor that is composed of a micro star sensor and a micro-electro-mechanical system gyroscope. The attitude is the output by fusing the information of the two sensors.
Shiqiang Wang +3 more
doaj +1 more source
Star-Identification System Based on Polygon Recognition
Aerospace, 2023 Accurate attitude determination is crucial for satellites and spacecraft. Among attitude determination devices, star sensors are the most accurate. Solving the lost-in-space problem is the most critical function of the star sensor.
Gustavo E. Ramos-Alcaraz +2 more
doaj +1 more source
Optical system design of star sensor and stray light analysis
Journal of the European Optical Society-Rapid Publications, 2018 Background Star sensor is one of the precise attitude determination sensors. It is an electro-optical system that takes an image from a set of stars and by comparing it with the star catalogue determines angle deviation of the satellite and modifies its ...
Mohammad Asadnezhad +2 more
doaj +1 more source
A methodological exploration to study 2D arm kinematics in Ophiuroidea (Echinodermata)
Frontiers in Zoology, 2023 Brittle stars, unlike most other echinoderms, do not use their small tube feet for locomotion but instead use their flexible arms to produce a rowing or reverse rowing movement.
Mona Goharimanesh +4 more
doaj +1 more source
Sieve Search Centroiding Algorithm for Star Sensors
Sensors, 2023 The localization of the center of the star image formed on a sensor array directly affects attitude estimation accuracy. This paper proposes an intuitive self-evolving centroiding algorithm, termed the sieve search algorithm (SSA), which employs the ...
Vivek Chandran Karaparambil +2 more
doaj +1 more source