Results 71 to 80 of about 22,702,715 (393)

Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics

FEBS Open Bio, EarlyView.
Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini, Nicolò Antonelli, Gianluca Molla   +2 more
wiley   +1 more source

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source

Searching for Binary Stars in Planetary Nebulae Using the ISIS Image Subtraction Software [PDF]

, 2011
We explored the theory that binary central stars of planetary nebulae may be contributing factor in the formation of planetary nebulae. We searched for this photometric variability in central stars of planetary nebulae because consistent periodic ...
Schwartz, Samantha
core   +2 more sources

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

On the HU Aquarii planetary system hypothesis

, 2012
In this work, we investigate the eclipse timing of the polar binary HU Aquarii that has been observed for almost two decades. Recently, Qian et al. attributed large (O-C) deviations between the eclipse ephemeris and observations to a compact system of ...
Beuermann, Klaus, Burwitz, Vadim, Gauza, Bartosz, Gozdziewski, Krzysztof, Haghighipour, Nader, Hinse, Tobias C., Kanbach, Gottfried, Maciejewski, Andrzej J., Nasiroglu, Ilham, Rau, Arne, Schwarz, Robert, Schwope, Axel D., Slonina, Mariusz, Slowikowska, Aga   +13 more
core   +1 more source

Refined stellar, orbital and planetary parameters of the eccentric HAT-P-2 planetary system [PDF]

, 2009
We present refined parameters for the extrasolar planetary system HAT-P-2 (also known as HD 147506), based on new radial velocity and photometric data. HAT-P-2b is a transiting extrasolar planet that exhibits an eccentric orbit.
Andrew W. Howard, András Pál, Bakos, Bakos, Bakos, Bakos, Bakos, Baraffe, Baraffe, Barbieri, Barnes, Borucki, Brigitta Sipőcz, Charbonneau, Claret, Claret, D'Angelo, David W. Latham, Debra A. Fischer, Demarque, Droege, Fabrycky, Ford, Fortney, Geoffrey W. Marcy, Gilbert A. Esquerdo, Gillon, Gregory W. Henry, Guillermo Torres, Gáspár Á. Bakos, Henry, Hébrard, John A. Johnson, Johns-Krull, Johnson, Kopal, Loeb, Loeillet, Mandel, Naef, Ochsenbein, Perryman, Press, Pál, Pál, Pál, Pál, Pál, Pál, R. Paul Butler, Robert W. Noyes, Shporer, Skrutskie, Sozzetti, Takeda, Valenti, Valenti, van Leeuwen, van Leeuwen, Vogt, Winn, Winn, Winn, Winn, Yi   +64 more
core   +3 more sources

THE PLANETARY SYSTEM TO KIC 11442793: A COMPACT ANALOGUE TO THE SOLAR SYSTEM [PDF]

, 2013
We announce the discovery of a planetary system with seven transiting planets around a Kepler target, a current record for transiting systems. Planets b, c, e, and f are reported for the first time in this work.
J. Cabrera, S. Csizmadia, H. Lehmann, R. Dvorak, D. Gandolfi, D. Gandolfi, H. Rauer, H. Rauer, A. Erikson, C. Dreyer, P. Eigmüller, A. Hatzes   +11 more
semanticscholar   +1 more source

Dusty Planetary Systems [PDF]

, 2013
Extensive photometric stellar surveys show that many main sequence stars show emission at infrared and longer wavelengths that is in excess of the stellar photosphere; this emission is thought to arise from circumstellar dust. The presence of dust disks is confirmed by spatially resolved imaging at infrared to millimeter wavelengths (tracing the dust ...
openaire   +3 more sources

Highly Stable Low‐Temperature Phosphate Glass as a Platform for Multimaterial 3D Printing of Integrated Functional Microfluidic Devices

Advanced Engineering Materials, EarlyView.
A highly stable, low‐temperature phosphate glass is developed for multimaterial additive manufacturing of multifunctional microfluidics. Glass, metal conductors, and sacrificial polymer are coprinted, enabling monolithic fabrication. The sacrificial paste forms precise channels and decomposes during sintering.
Babak Mazinani, Mustafa M. Fadlelmula, Vivek Subramanian   +2 more
wiley   +1 more source

Backlash Analysis of Gear Transmission of Parallel Uniform Planetary Gear

Jixie chuandong, 2018
Based on the NGW planetary gear transmission system,a gear transmission of parallel uniform planetary gear is proposed to reduce the transmission error of asteroid transmission system and improve its transmission accuracy.
Guo Jing, Zhu Zengbao, Liu Chun, Zhang Biao   +3 more
doaj