Results 31 to 40 of about 91,384 (299)

Adaptive Generalized-Minimum-Variance Attitude Control of a High Pointing-Accuracy Remote Sensing Satellite [PDF]

فصلنامه علوم و فناوری فضایی, 2023
Many studies have investigated the problem of external disturbance rejection and also increasing the attitude control system's robustness against the parametric uncertainties. Due to stochastic properties, noise effect minimization becomes an interesting
Ali Kasiri, Farhad Fani Saberi, Vahid Joudakian   +2 more
doaj   +1 more source

Accuracy of Point Precipitation Measurements

Hydrology Research, 1980
The normal-exposed Hellmann raingauge only catches about 85% of the true precipitation on yearly basis. This is mainly due to aerodynamic effects. A statistical model analysing the ratio of the daily amounts of precipitation measured at ground level and at standard height is set up for describing this influence.
Henning Madsen, Peter Allerup
openaire   +1 more source

Analysis of Field of View for a Moon-Based Earth Observation Multispectral Camera

Sensors
A Moon-based Earth observation multispectral camera provides a unique perspective for observing large-scale Earth phenomena. This study focuses on the analysis of the field of view (FOV) for such a sensor.
Zhitong Yu, Hanlin Ye, Mengxiong Zhou, Feifei Li, Yin Jin, Chunlai Li, Guang Liu, Huadong Guo   +7 more
doaj   +1 more source

Research on the Initial Orientation Technology of the View Axis for Underwater Laser Communication Dynamic Platforms Based on Coordinate Transformation Matrix Positioning Model

Photonics
To address the challenge of directly applying space laser communication systems to dynamic underwater environments, this paper integrates coordinate transformation matrices with underwater positioning systems, proposing an ultra-short baseline (USBL ...
Jun Ma, Yunjie Teng, Yang Liu, Mingyang Zhang, Cheng Qiu, Hao Qin, Yanpu Li   +6 more
doaj   +1 more source

Pointing in visual periphery : is DF’s dorsal stream intact?

, 2014
Peer ...
Schenk, Thomas, Constanze Hesse, Hesse, Constanze, Hesse, C., Ball Keira, Schenk Thomas, Schenk, T., Thomas Schenk, Hesse Constanze, Ball, K., Ball, Keira, Keira Ball   +11 more
core   +1 more source

Re-Optimized Design for the ADR-Based Dual-Loop Controller of 100 m Class Aperture Radio Telescope

Machines
Pointing accuracy is a crucial performance index for a fully steerable large-aperture radio telescope and is subject to external and internal disturbances.
Ning Li, Qian Xu, Na Wang, Zhiyong Liu
doaj   +1 more source

A Simplified Pointing Model for Alt-Az Telescopes

Applied Sciences, 2023
The telescope pointing model plays a crucial role in characterizing and explaining the inaccuracies in the telescope’s pointing. It uses mathematical models to express these errors and suggests methods to calibrate and rectify them.
Yong Zhao, Yingqiang Wang, Fei He, Zhonghua Yao, Zhaojin Rong, Yong Wei   +5 more
doaj   +1 more source

Accuracy and Precision of a Point-of-Care HbA1c Test [PDF]

Journal of Diabetes Science and Technology, 2019
Background: Point-of-care (POC) hemoglobin A1c (HbA1c) testing has advantages over laboratory testing, but some questions have remained regarding the accuracy and precision of these methods. The accuracy and the precision of the POC Afinion™ HbA1c Dx test were investigated.
William D, Arnold, Kenneth, Kupfer, Randie R, Little, Meera, Amar, Barry, Horowitz, Narendra, Godbole, Monica, Hvidsten Swensen, Yin, Li, Richard C, San George   +8 more
openaire   +2 more sources

Learning a Path from Real Navigation: The Advantage of Initial View, Cardinal North and Visuo-Spatial Ability

Brain Sciences, 2020
Background: Spatial cognition research strives to maximize conditions favoring environment representation. This study examined how initial (egocentric) navigation headings interact with allocentric references in terms of world-based information (such as ...
Veronica Muffato, Chiara Meneghetti
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source