Results 141 to 150 of about 78,885 (346)

Numerical Analysis of Solid Rocket Motor Instabilities With AP Composite Propellants [PDF]

open access: yes, 1999
A non-steady model for the combustion of ammonium perchlorate composite propellants has been developed in order to be incorporated into a comprehensive gasdynamics model of solid rocket motor flow fields.
Beddini, Robert A.   +3 more
core  

Recent Advances in Wide‐Bandgap Perovskite Solar Cells

open access: yesAdvanced Materials, EarlyView.
Ubiquitous defects predominately account for photo‐instability and open‐circuit voltage losses in wide‐bandgap perovskite solar cells (WBG PSCs). This review comprehensively presents the underlying impact mechanisms, summarizes the advanced optimization strategies across various functional layers and their interfaces to develop efficient and stable WBG
Jianjun Mei, Feng Yan
wiley   +1 more source

PENGARUH JUMLAH ISIAN PROPELAN TERHADAP KECEPATAN PROYEKTIL MUNISI KALIBER 40X46 MM NON-LETHAL

open access: yesRekayasa Mesin
Many kinds of non-lethal ammunitions are developed in the last fourty years. The 40x46 mm Non-lethal ammunition is one of several ammunitions ready to be used in riot control.
Yudistira Sanjiwani   +2 more
doaj   +1 more source

Process for preparing sterile solid propellants Patent [PDF]

open access: yes, 1967
Using ethylene oxide in preparation of sterilized solid rocket propellants and encapsulating ...
Montgomery, L. C., Morelli, F. A.
core   +1 more source

Challenges and Opportunities of Upconversion Nanoparticles for Emerging NIR Optoelectronic Devices

open access: yesAdvanced Materials, EarlyView.
The special photo‐responsiveness of upconversion nanoparticles has opened up a new path for the advancement of near‐infrared (NIR)‐responsive optoelectronics. However, challenges such as low energy‐conversion efficiency and high nonradiative losses still persist.
Sunyingyue Geng   +7 more
wiley   +1 more source

Experimental Research into an Innovative Green Propellant Based on Paraffin–Stearic Acid and Coal for Hybrid Rocket Engines

open access: yesInventions
This study focuses on an innovative green propellant based on paraffin, stearic acid, and coal, used in hybrid rocket engines. Additionally, lab-scale firing tests were conducted using a hybrid rocket motor with gaseous oxygen as the oxidizer, utilizing ...
Grigore Cican   +5 more
doaj   +1 more source

TriMag Microrobots: 3D‐Printed Microrobots for Magnetic Actuation, Imaging, and Hyperthermia

open access: yesAdvanced Materials, EarlyView.
TriMag microrobots are two‐photon polymerized hydrogel structures embedded with in situ synthesized Fe3O4 and CoFe2O4 nanoparticles, enabling magnetic actuation, high‐resolution magnetic particle imaging (MPI), and efficient magnetothermal heating for deep‐tissue biomedical interventions including tracking, navigation, and tumor ablation.
Liuxi Xing   +14 more
wiley   +1 more source

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