Results 1 to 10 of about 1,101,620 (303)

Bayesian Adaptive Extended Kalman-Based Orbit Determination for Optical Observation Satellites. [PDF]

Sensors (Basel)
As the number of satellites and amount of space debris in Low-Earth orbit (LEO) increase, high-precision orbit determination is crucial for ensuring the safe operation of spacecraft and maintaining space situational awareness.
Guo Y, Pang Q, Yin X, Shi X, Zhao Z, Sun J, Wang J.   +6 more
europepmc   +2 more sources

Auricular cartilage versus donor sclera as a wrapping of hydroxyapatite orbital implants [PDF]

International Journal of Ophthalmology, 2021
AIM: To retrospectively compare postoperative outcomes after primary enucleation and placement of a hydroxyapatite (HA) implant without wrapping, wrapped with auricular cartilage or donor sclera.
Ying-Jie Ma, Xiu-Ying Zhu, Ben Chen, Yan-Yan Lin, Jia Liu, Xi Chen   +5 more
doaj   +1 more source

Optimization of satellite resource scheduling under regional target coverage conditions

Open Astronomy, 2022
This study presented a mathematical description of an arbitrary shape area, and after analyzing the characteristics of the near-polar orbital co-ground trajectory constellation that satisfies the revisit interval constraint, an optimization model of the ...
Liu Kaixi, Wang Yajie, Zhang Baohui, Liu Hu, Wang Xu, Wei Bin   +5 more
doaj   +1 more source

A Rare Case of Direct Spontaneous Carotid-Cavernous Fistula in a 6-Month-Old Infant and Review of the Literature

Case Reports in Ophthalmology, 2023
Direct or type A CCFs are the direct connection between the cavernous segment of the internal carotid artery and the cavernous sinus. While most direct CCFs are caused by trauma, spontaneous direct CCFs are extremely rare in infants.
Sandeep Pal, Pradhnya A. Sen, Narendra Patidar, Harshdeep Singh Gabba, Sangeeta Bhadra   +4 more
doaj   +1 more source

Microscopic study of orbital textures [PDF]

Curr. Appl. Phys. 50, 13-24 (2023), 2022
Many interesting spin and orbital transport phenomena originate from orbital textures, referring to $\vec{k}$-dependent orbital states. Most of previous works are based on symmetry analysis to model the orbital texture and analyze its consequences. However the microscopic origins of orbital texture and its strength are largely unexplored. In this work,
arxiv   +1 more source

UAS Mapping as an alternative for land surveying techniques? [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
Can a UAS mapping technique compete with standard surveying techniques? Since the boom in different RPAS (remotely piloted air system), UAV (unmanned aerial vehicle), or UAS (unmanned aerial system), this is one of the crucial questions when it comes to ...
L. Devriendt, J. Bonne
doaj   +1 more source

Clinicopathological features of patients with wide local excision of eyelid malignant neoplasms: a more than five years retrospective study from China

BMC Ophthalmology, 2022
Background To investigate the correlation between the clinical and pathological characteristics and outcomes in patients with eyelid malignant tumors underwent wide local excision.
Yuanyuan Han, Miao Kong, Yan Luo, Bin Sun, Zhiqiang Wang, Hong Zhang   +5 more
doaj   +1 more source

Assessing the Capacity and Coverage of Satellite IoT for Developing Countries Using a CubeSat

Applied Sciences, 2022
Many regions in developing countries do not have any access to communication networks even though the number of devices connected through the Internet of Things (IoT) is increasing significantly.
Pooja Lepcha, Tharindu Dayarathna Malmadayalage, Necmi Cihan Örger, Mark Angelo Purio, Fatima Duran, Makiko Kishimoto, Hoda Awny El-Megharbel, Mengu Cho   +7 more
doaj   +1 more source

On-Orbit Magnetometer Data Calibration Using Genetic Algorithm and Interchangeability of the Calibration Parameters

Applied Sciences, 2023
Magnetometers are important sensors with applications in the attitude determination and control systems of satellites. CubeSats have certain limitations related to power, mass, and volume.
Dulani Chamika Withanage, Mariko Teramoto, Mengu Cho   +2 more
doaj   +1 more source

Review of Freedom and the Self: Essays on the philosophy of David Foster Wallace, Edited by Cahn, S. M. and Eckert, M., New York: Columbia University Press, 2015 [PDF]

, 2017
No abstract ...
Taylor, Stuart J.
core   +2 more sources