Results 31 to 40 of about 1,588 (287)

Review of State-of-the-Art Green Monopropellants: For Propulsion Systems Analysts and Designers

Aerospace, 2021
Current research trends have advanced the use of “green propellants” on a wide scale for spacecraft in various space missions; mainly for environmental sustainability and safety concerns.
Ahmed E. S. Nosseir, Angelo Cervone, Angelo Pasini   +2 more
doaj   +1 more source

Future Fuels—Analyses of the Future Prospects of Renewable Synthetic Fuels

Energies, 2019
The Future Fuels project combines research in several institutes of the German Aerospace Center (DLR) on the production and use of synthetic fuels for space, energy, transportation, and aviation.
Thomas Pregger, Günter Schiller, Felix Cebulla, Ralph-Uwe Dietrich, Simon Maier, André Thess, Andreas Lischke, Nathalie Monnerie, Christian Sattler, Patrick Le Clercq, Bastian Rauch, Markus Köhler, Michael Severin, Peter Kutne, Christiane Voigt, Hans Schlager, Simone Ehrenberger, Mario Feinauer, Lukas Werling, Victor P. Zhukov, Christoph Kirchberger, Helmut K. Ciezki, Florian Linke, Torsten Methling, Uwe Riedel, Manfred Aigner   +25 more
doaj   +1 more source

The Role of Thrusters in Space Systems [PDF]

فناوری در مهندسی هوافضا, 2020
Spacecrafts, such as artificial satellites and space probes have small rockets called thrusters for orbital maneuvering, and satellite attitude control. These thrusters produce thrust by exhausting gases from their nozzles.
Sajjad Hosseinzadeh alqoo, Mohammad Ali Dehnavi   +1 more
doaj  

Characterization of New Lead-free Ballistic Modifiers and Phthalate-free Plasticizers in Propellants

Journal of Aerospace Technology and Management, 2020
This paper describes the synthesis and characterization of a copper-based ballistic modifier, copper subsalicylate (monobasic copper salicylate), and its performance in green-type propellants.
Rosane Macchiarulo Jorge, Acácio Antonio Mesquita Furtado Filho   +1 more
doaj  

Green Propellant Loading Demonstration at U.S. Range [PDF]

52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016
The Green Propellant Loading Demonstration (GPLD) was conducted December 2015 at Wallops Flight Facility (WFF), leveraging work performed over recent years to bring lower toxicity hydrazine replacement green propellants to flight missions. The objective of this collaboration between NASA Goddard Space Flight Center (GSFC), WFF, the Swedish National ...
Henry Mulkey, Joseph T. Miller, Caitlin Bacha   +2 more
openaire   +1 more source

ADN – The new oxidizer around the corner for an environmentally friendly smokeless propellant [PDF]

Journal of Aerospace Technology and Management, 2009
The search for a smokeless propellant has encouraged scientists and engineers to look for a chlorine-free oxidizer as a substitute for AP (ammonium perchlorate).
Márcio Y. Nagamachi, José Irineu S. Oliveira, Aparecida M. Kawamoto, Rita de Cássia L. Dutra   +3 more
doaj  

Translating whole‐genome doubling into precision medicine in cancer

Molecular Oncology, EarlyView.
Whole‐genome doubling creates a WGD‐positive tumor state characterized by persistent chromosomal instability, karyotypic diversification, and cellular stress. These same biological pressures drive aggressive tumor evolution while exposing therapeutic vulnerabilities, providing a rationale for WGD‐informed precision medicine. Whole‐genome doubling (WGD)
Sejung Lee, Junghyeok Lim, Jinhyuk Bhin
wiley   +1 more source

Effects of Different Initial Conditions on Combustion Process of Ammonium Dinitramide-Based Energetic Propellant in Straight Nozzle

Aerospace
As a new type of green propellant, ammonium dinitramide (ADN)-based energetic propellants have wide application value and development potential in the field of space propulsion. This paper delves into the intricate impact of varying initial temperatures,
Luyun Jiang, Chentao Mao, Jianhui Han, Haichao Cui, Baosheng Du, Yongzan Zheng, Jifei Ye, Yanji Hong   +7 more
doaj   +1 more source

Corrosion Behavior of Titanium Alloy in Hydroxylammonium Nitrate (HAN)Based Propellant Using Electrochemical Noise Technology [PDF]

Cailiao Baohu
Hydroxylammonium nitrate (HAN)-based propellant is a new type of green propellant.The compatibility of HAN-based propellants with traditional aerospace structural materials， such as titanium alloys， requires further investigation.The corrosion behavior ...
TANG Zhanmei, PENG Zheng, GUO Wei, BAO Shiguo, SUN Haiyun, ZHANG Xiaoliang
doaj   +1 more source

Progressive Parkinsonism in PPP2R5D‐Related Neurodevelopmental Disorder

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT PPP2R5D‐related neurodevelopmental disorder (Houge–Janssens syndrome type 1) is a rare autosomal dominant condition characterized by macrocephaly, intellectual disability, and epilepsy. Progressive parkinsonism is an emerging adult phenotype that neurologists should be aware of since timely genetic diagnosis opens the door to disease‐modifying
Katerina Bernardi, Enrique Gonzalez Saez‐Diez, Joshua Rong, Beril Ay, Shabbir Merchant, Kathryn Yang, Darius Ebrahimi‐Fakhari   +6 more
wiley   +1 more source