Results 21 to 30 of about 410 (178)

Why does the Falcon-9 booster make a triple sonic boom during flyback? An initial analysis [PDF]

JASA Express Letters
When the SpaceX Falcon-9 rocket booster descends through the atmosphere after a launch, it produces a sonic boom with three shocks in the far field, rather than the usual two-shock N-wave.
Mark C. Anderson, Kent L. Gee
doaj   +1 more source

Sonic Boom Prediction Code Development and Sonic Boom Predictions via Open Source CFD Software

Havacılık ve Uzay Teknolojileri Dergisi, 2022
In the present work a sonic boom prediction code which numerically solves the Augmented Burgers equation using the operator-splitting approach was developed.
Emre Alpman, Levent A. Kavurmacıoğlu, Seher Eken, Harun İnci, Zeliha Çamur, Barış Biçer   +5 more
doaj  

Large‐scale bidirectional arrayed genetic screens identify OXR1 and EMC4 as modifiers of αSynuclein aggregation

FEBS Open Bio, EarlyView.
Activation of the mitochondrial protein OXR1 increases pSyn129 αSynuclein aggregation by lowering ATP levels and altering mitochondrial membrane potential, particularly in response to MSA‐derived fibrils. In contrast, ablation of the ER protein EMC4 enhances autophagic flux and lysosomal clearance, broadly reducing α‐synuclein aggregates.
Sandesh Neupane, Lea Nikolić, Lorenzo Maraio, Thomas Goiran, Nathan Karpilovsky, Stefano Sellitto, Vangelis Bouris, Jiang‐An Yin, Ronald Melki, Edward A Fon, Adriano Aguzzi, Elena De Cecco   +11 more
wiley   +1 more source

Research on the layout design and optimization method for low drag and low sonic boom supersonic civil aircraft

Kongqi donglixue xuebao
Supersonic civil aircraft have become one of the important directions for the future development of civil aviation. For the rapid conceptual design and performance optimization of supersonic civil aircraft layouts, an aerodynamic optimization framework ...
Qinze Zheng, Yu Liang, Chong Pan, Lifeng Wang   +3 more
doaj   +1 more source

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

Advanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev, Noah‐Lean Roschlaub, Anne Jung   +2 more
wiley   +1 more source

Human Gut Bacteria and Lipidic Nanoparticles: Particle Composition Predicts Structural Transformation and Bacterial Biocompatibility

Advanced Functional Materials, EarlyView.
Lipidic nanoparticles (LNPs) were incubated with 21 gut bacteria frequently associated with the human microbiome. SAXS revealed that ∼75% of tested species induced structural transformations in monoolein LNPs, whereas phytantriol and phospholipid formulations remained unaffected.
Jonathan Caukwell, Emily L. Gulliver, Livia Salvati Manni, Frithjof Herb, Caitlin Welsh, Samuel C. Forster, Andrew J. Clulow, Wye‐Khay Fong   +7 more
wiley   +1 more source

Starship super heavy acoustics: Far-field noise measurements during launch and the first-ever booster catch [PDF]

JASA Express Letters
Far-field (9.7–35.5 km) noise measurements were made during the fifth flight test of SpaceX's Starship Super Heavy, which included the first-ever booster catch. Key results involving launch and flyback sonic boom sound levels include (a) A-weighted sound
Kent L. Gee, Noah L. Pulsipher, Makayle S. Kellison, Logan T. Mathews, Mark C. Anderson, Grant W. Hart   +5 more
doaj   +1 more source

Ultra‐High‐Throughput Discovery of Multifunctional Polyphenolic Coatings on Droplet Microarrays

Advanced Materials, EarlyView.
An ultra‐high‐throughput (UHT) combinatorial strategy enables the miniaturized synthesis and screening of ≈30 000 polyamine‐polyphenolic (PaPp) coatings using droplet microarrays (DMA). This approach reveals hundreds of previously unknown fluorescent, redox‐active, and antibacterial materials, including multifunctional, cell‐compatible surfaces ...
Vania Tanda Widyaya, Joaquín E. Urrutia Gómez, Paul Reuß, Alexander Welle, Rolf A. Gattung, Jana Mayer, Peter Krolla, Markus Reischl, Pascal Friederich, Anna A. Popova, Thomas Schwartz, Pavel A. Levkin   +11 more
wiley   +1 more source

The low sonic boom and aerodynamic optimization with trim constraint of supersonic jet

Hangkong gongcheng jinzhan
The abatement of sonic boom noise level is a decisive issue for supersonic transport of next generation. The low sonic boom optimization always make the configuration to a trend of higher swept and longer distribution of the wing along the fuselage，which
HAO Xuan, ZHANG Qingqing, SU Cheng, LIU Fang   +3 more
doaj   +1 more source

Low-Boom and Low-Drag Optimization of the Twin Engine Version of Silent Supersonic Business Jet

Journal of Fluid Science and Technology, 2008
Multi-Objective Optimization has been applied to a design problem of the twin engine concept for Silent Supersonic Business Jet (SSBJ). This problem aims to find main wing, body, tail wing and engine nacelle configurations, which can minimize both sonic ...
Koma SATO, Takayasu KUMANO, Masahito YONEZAWA, Hiroshi YAMASHITA, Shinkyu JEONG, Shigeru OBAYASHI   +5 more
doaj   +1 more source