Results 51 to 60 of about 410 (178)

Falcon 9 ascent sonic boom measurements in Ventura County, California [PDF]

JASA Express Letters
Reports of audible sonic booms along the south-central California coast during SpaceX Falcon 9 launch ascents prompted measurements in Ventura County during summer 2024. A total of 132 measurements were made over six launches, with 16–25 measurements per
Kent L. Gee, Makayle S. Kellison, Mark C. Anderson, Levi T. Moats, Marcus T. Perkins, Noah L. Pulsipher, Nathan F. Carlston, Grant W. Hart, Lucas K. Hall, Oliver Cantrell, Hugo J. Zepeda Villanueva, Megan R. McCullah-Boozer, Rachel H. Budge, Jack C. King, Fred A. Zering, Zackery T. Zounes, Kayla C. Mackenthun   +16 more
doaj   +1 more source

Sustainable Polymer Biocomposites for Food Packaging: Green Nanotechnology, Circular Plastic Upcycling and Smart Functional Materials

Packaging Technology and Science, EarlyView.
Graphical abstract showing the development of biodegradable polymer biocomposites reinforced with natural fibres, green nanoparticles and waste‐plastic upcycling pathways toward sustainable smart food packaging materials ABSTRACT The fundamental hypothesis behind this review is that the combination of biodegradable polymer‐based biocomposites, which ...
Chandra Sekhar Espenti, Jaewoong Lee
wiley   +1 more source

‘Everything is a signal’: speaking circuits and noisy signs in the making of language‐oriented AI « Tout est signal » : circuits parlants et signes bruyants dans la création de l'IA orientée langage

Journal of the Royal Anthropological Institute, EarlyView.
Contemporary artificial intelligence (AI) technologies are often presumed to be capable of revealing unmediated truths about the world, including the truths language might hold, echoing the long‐standing assertion that language's primary function is to directly translate reality.
Beth M. Semel
wiley   +1 more source

Blubber Thickening Driven by UCP1 Inactivation: Insights from a Cetacean‐Like Transgenic Mouse Model

Integrative Zoology, EarlyView.
UCP1 inactivation of cetaceans in mice drives BAT whitening and iWAT hyperplasia, promoting fat accumulation for aquatic adaptation. Abstract Cetaceans possess thick blubber, a specialized adipose tissue essential for thermal insulation, a streamlined body form, energy storage, and buoyancy. However, the mechanisms that underpin this adaptation are not
Qian Zhang, Yuehua Wang, Hang Zhang, Guiping Xu, Shixia Xu, Guang Yang   +5 more
wiley   +1 more source

Polyesterase activity and thermostability of carboxylesterases from Thermoleophilum album YS‐3

The FEBS Journal, EarlyView.
Three novel α/β‐hydrolases from thermophilic bacterium Thermoleophilum album display carboxylesterase and polyesterase activity. These enzymes hydrolyse PET, PLA and PCL both at high and moderate temperatures. TA21 shows superior activity, efficiently converting MHET to terephthalic acid. Structural features underlying substrate binding highlight their
Tatyana N. Chernikova, Anna N. Khusnutdinova, Hairong Ma, Manuel Ferrer, Olga V. Golyshina, Alexander F. Yakunin, Peter N. Golyshin   +6 more
wiley   +1 more source

Influence of Quiet Spike on Supersonic Transport for Low Boom Effect

Xibei Gongye Daxue Xuebao, 2019
One of the biggest technical challenges of supersonic flight is the mitigation of sonic boom. To deal with this problem, the Gulfstream Aerospace Corporation came up with the spike concept, and it showed to be efficient.

doaj   +1 more source

S‐Adenosylmethionine (SAM) hydrolases counter increased SAM epimerisation in thermophilic archaea

The FEBS Journal, EarlyView.
S‐Adenosyl‐l‐methionine (SAM) is a vital enzyme cofactor. Epimerisation at the sulfonium centre of biologically active (SS,SCα)‐SAM is driven by heat, yielding biologically inactive (RS,SCα)‐SAM. Here, two novel archaeal SAM hydrolases from the thermophilic Sulfolobus acidocaldarius and the halophilic Haloferax volcanii are shown to cleave (RS,SCα)‐SAM.
Agnes Bartels, Michael K. F. Mohr, Phillip Nußbaum, Marie Joest, Bianca Wassmer, Laurent Rasquin, Sonja‐Verena Albers, Jennifer N. Andexer   +7 more
wiley   +1 more source

Evaluation of Aerodynamic and Sonic Boom Performance of Supersonic Transport Aircrafts with Multiple Wing Configurations

Aerospace
In this study, two-dimensional airfoil shapes obtained in aerodynamic optimizations are converted to three-dimensional wing models and then their aerodynamic and sonic boom performance are evaluated. The airfoil shapes analyzed are the diamond, Busemann,
Wataru Yamazaki, Shu Ishida
doaj   +1 more source

A distinct gene expression mechanism for d‐amino acid utilization in hyperthermophilic archaeon Pyrococcus horikoshii

The FEBS Journal, EarlyView.
The genes PH0137, PH0138, and PH0140 form a cluster in the genome of Pyrococcus horikoshii. The PH0140 gene encodes a transcription factor identified as a d‐amino acid‐responsive regulatory protein (DARP). In feast mode, l‐Ile‐bound DARP binds to the promoter and represses transcription of PH0137 and PH0138. In famine mode, DARP binds to d‐allo‐Ile and
Ryushi Kawakami, Tomoki Kawase, Taira Uehara, Haruhiko Sakuraba, Tomohiko Matsuzawa, Junji Hayashi, Toshihisa Ohshima   +6 more
wiley   +1 more source

A Numerical Approach for the Integration of Sonic Boom Requirements into the Matching Chart

Aerospace
The Matching Chart is a well-established tool in conceptual and preliminary aircraft design, providing a graphical representation of performance requirements based on wing loading (W/S) and thrust-to-weight ratio (T/W).
Samuele Graziani, Leonardo Ialongo, Davide Ferretto   +2 more
doaj   +1 more source