Results 21 to 30 of about 5,459,589 (111)

A GRASP for Next Generation Sapphire Image Acquisition Scheduling

International Journal of Aerospace Engineering, 2016
This paper investigates an image acquisition scheduling problem for a Canadian surveillance-of-space satellite named Sapphire that takes images of deep space Earth-orbiting objects.
Yang Wang, Snezana Mitrovic Minic, Robert Leitch, Abraham P. Punnen   +3 more
doaj   +1 more source

Space Situational Awareness in Very Low Earth Orbit for Re-Entry Object Monitoring

Aerospace
As the number of objects in orbit increases every year, the number of objects re-entering Earth’s atmosphere grows as well. Re-entry path prediction is tricky, as atmospheric modeling lacks accuracy and requires constant monitoring of the object during ...
Ruth Huang, Regina S. K. Lee, Marianna Veltri, Vithurshan Suthakar, Angel Porras-Hermoso   +4 more
doaj   +1 more source

Multi-bistatic radar for resident space objects feature estimation

, 2018
The amount of space debris orbiting the Earth has seen a dramatic grow through the recent years. Its rising population increases the potential danger to space missions.
Martorella, M., Ghio, S., Martorella, M.; id_orcid   +2 more
core   +1 more source

Tropical savanna restoration: topsoil removal and direct‐seeding promote a biodiverse and invasion‐resistant community

Restoration Ecology, EarlyView.
Abstract Introduction Open ecosystems, such as native grasslands and savannas, cover vast tropical areas and sustain multiple ecosystem services. However, they face intense degradation due to conversion into pastures with exotic grasses that invade natural ecosystems.
Julliene G. Monteiro, Natashi Pilon, Larissa S. Verona, Guilherme M. Alencar, Lucy Rowland, Rafael S. Oliveira   +5 more
wiley   +1 more source

On the Space Observation of Resident Space Objects (RSOs) in Low Earth Orbits (LEOs)

Remote Sensing
Space debris is an increasingly severe problem in the space industry. According to projections, the number of satellites will increase from the current 10,000 to 100,000 by 2030, specially in LEO orbits.
Angel Porras-Hermoso, Randa Qashoa, Regina S. K. Lee, Javier Cubas, Santiago Pindado   +4 more
doaj   +1 more source

Harnessing Spatial and Multi‐Criteria Decision Analysis (MCDA) to Optimize Land Suitability for Kenaf Cultivation in Kelantan: Pathways for Sustainable Economic Development

Land Degradation &Development, Volume 37, Issue 15, Page 11438-11458, September 2026.
ABSTRACT In Kelantan, entrenched land degradation and extensive idling of agricultural lands exacerbate rural poverty. Current top‐down planning often overlooks local geographic and social constraints, despite state initiatives to convert idle lands and strengthen rural livelihoods.
Nur Afiqah Ariffin, Zainol Jamil, Yaniza Shaira Zakaria, Nur Ain Che Mat Ali, Azizul Ahmad   +4 more
wiley   +1 more source

SAANet: Detecting Dense and Crossed Stripe-like Space Objects Under Complex Stray Light Interference

Remote Sensing
With the deployment of mega-constellations, the proliferation of on-orbit Resident Space Objects (RSOs) poses a severe challenge to Space Situational Awareness (SSA).
Yuyuan Liu, Hongfeng Long, Xinghui Sun, Yihui Zhao, Zhuo Chen, Yuebo Ma, Rujin Zhao   +6 more
doaj   +1 more source

Comprehensive Experimental Investigation of Rosehip (Rosa canina L.) Seed Oil as a Novel Biodiesel Feedstock: Engine Performance, Combustion, Emission, and Exergy Analyses

Global Challenges, Volume 10, Issue 8, August 2026.
Rosehip seed oil is converted into biodiesel (Rosehip Seed Oil Methyl Ester‐RSOME) and experimentally evaluated in a diesel engine. Comprehensive analyses of engine performance, emissions, combustion characteristics, and exergy reveal the effects of RSOME blends on engine behavior, providing insights into the utilization of this novel biodiesel ...
Erdoğan Güner
wiley   +1 more source

Empirical Assessment of Storm‐Time Thermospheric Density Inversion Methods From LEO POD Data

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Thermospheric mass density is one of the largest sources of operational uncertainty for spacecraft in low Earth orbit, particularly during geomagnetic storms. The growing population of Global Navigation Satellite System‐equipped satellites presents a data set of opportunity: precise orbit determination (POD) data streams can be used to ...
Charles Constant, Indigo Brownhall, Anasuya Aruliah, Marek Ziebart, Santosh Bhattarai   +4 more
wiley   +1 more source

It started off as a Cys, how did it end up like this? Identifying the extent of unmodelled oxidatively modified cysteines within the Protein Data Bank

Acta Crystallographica Section D, Volume 82, Issue 7, Page 700-714, July 2026.
This work examines data contained within 118 215 structures in the Protein Data Bank for unmodelled difference density concomitant with unmodelled oxidatively damaged cysteines. This analysis demonstrates that site‐specific oxidation of residues is a phenomenon of which the experimenter should be aware, and highlights the need for a suitable detection ...
Samuel P. Foster, Anna J. Warren, C. Alistair Siebert, Jaswir Basran, Peter C. E. Moody   +4 more
wiley   +1 more source