Results 61 to 70 of about 7,037,410 (298)

Apophis Planetary Defense Campaign

, 2022
We describe results of a planetary defense exercise conducted during the close approach to Earth by the near-Earth asteroid (99942) Apophis during 2020 December–2021 March. The planetary defense community has been conducting observational campaigns since
Bamberger, D., Alarcon, M.R., Yim, H.-S., Reva, I., Licandro, J., Kiss, C., Sonbas, E., Falco, C., Pál, A., Nastasi, A., Ivanov, A., Kuznetsov, E., Heinze, A.N., Moon, H.-K., Cantillo, D., Farnocchia, D., Brucker, M.J., Pérez-Toledo, F., Rumpf, C., Christensen, E., Wheeler, L.F., Satpathy, A., Popescu, M., Mathias, D.L., Schmalz, S., Erasmus, N., Graziani, F., Taylor, P.A., Reichart, D.E., Mokhnatkin, A., Holman, M.J., Naidu, S.P., Morate, D., Żejmo, M., Mastaler, R.A., Veres, P., Chingis, O., Kaiser, G., Tonry, J.L., Scotti, J.V., Mainzer, A., Dróżdż, M., Szakáts, R., Tubbiolo, A.F., van Rensburg, P.J., Micheli, M., Barnardi, F., Balam, D., Perminov, A., Read, M.T., Chastel, S., Novichonok, A., Zhornichenko, A., Glamazda, D., Elenin, L., Kamińska, M.K., Kim, M.-J., Polishook, D., Warner, E., Brozovic, M., McMillan, R.S., Serebryanskiy, A., Roh, D.-G., Wainscoat, R., Kaplan, M., Denneau, L., Lees, R.C., Ogłoza, W., Larsen, J.A., Bell, D., Marsset, M., Cennamo, R., Jacques, C., Kokina, T., Reddy, V., Zoła, S., Cano, J., Petrescu, E., Benner, L.A.M., Dotson, J., Wiebe, Y., Kim, D.-H., Faggioli, L., de León, J., Lee, H.-J., Bressi, T.H., Weiland, H.J., Kelley, M.S., Bauer, J., Choi, Y.-J., Serra-Ricart, M., Erece, O., Wells, G., Medeiros, H., Kamiński, K., Masiero, J., Weryk, R., Marciniak, A., Buzzi, L., Michel, P.   +99 more
core   +1 more source

Photo‐Switchable Molecular Module Programming PET Biodegradation in Aquatic Environments

Advanced Functional Materials, EarlyView.
We address the plastic durability paradox by integrating an itaconic acid–derived pyrrolidone module into polymer backbones. Sunlight in water triggers Norrish Type I ring‐opening and hydrophilization, enabling rapid biodegradation into nontoxic minerals.
Mohammad Asif Ali, Jixin Zheng, Satoshi Wakai, Jie Liu, Hidetaka Nomaki, Misato Tsukatani, Noriyuki Isobe, Jingcheng Sang, Yuriko Aoki, Hideo Okamura, Daisuke Sasaki, Chiaki Ogino, Yuzo Yamazaki, Takashi Nishikaze, Kenji Takada, Maiko K. Okajima, Tatsuo Kaneko   +16 more
wiley   +1 more source

Transparent Perovskite Light‐Emitting Diodes with Conductive Oxide Top Electrodes

Advanced Materials, EarlyView.
Transparent perovskite light‐emitting diodes (TrPeLEDs) enable simultaneous display and transparency, expanding application possibilities. Using a metal oxide buffer layer and pulsed laser deposition, TrPeLEDs with diverse compositions and architectures are demonstrated.
Michele Forzatti, Sergio Martínez‐Saiz, Morena Cervino, Edoardo Stanzani, Sandra Jenatsch, Qingsen Zeng, Joo Sung Kim, Dong‐Hyeok Kim, Eojin Yoon, Tae‐Woo Lee, Daniel Tordera, Henk J. Bolink   +11 more
wiley   +1 more source

Analysis of Load Sharing Performance of Planetary Gear Reducer in Electric Vehicle Hub Motor

Jixie chuandong, 2017
As for the floating planetary gear reducer in hub motor,a dynamics equation of dual floating planetary transmission system is established,and then the calculation formula of load sharing coefficient is deduced.
Zhang Jiang, Qing Xunpeng, Chen Haoran
doaj  

Leaftronics: Bio‐Fractal Scaffolds From Leaf Venation for Low‐Waste Electronics

Advanced Materials, EarlyView.
“Leaftronics” transforms naturally evolved leaf venation into quasi‐fractal scaffolds for sustainable electronics. Polymer‐infiltrated leaf skeletons can be used to fabricate ultra‐smooth, reflow‐ and thin‐film‐compatible decomposable substrates, while making the same lignocellulose networks conducting results in flexible transparent electrodes.
Rakesh Rajendran Nair, Hrisheekesh Thachoth Chandran, Karl Leo, Hans Kleemann   +3 more
wiley   +1 more source

The Ionization Structure of Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1993
Ground-based and satellite spectrophotometric observations of emission-line intensities over the spectral range 1400–7200 Å have been made in 5 or more positions in a total of 9 planetary nebulae.
openaire   +1 more source

Analysis of obstacle-climbing capability of planetary exploration rover with rocker-bogie structure

, 2009
Wheeled mobile robots are increasingly being utilized in unknown and dangerous situations such as planetary surface exploration. Based on force analysis of the differential joints and force analysis between the wheels and the ground, this paper ...
Wang YM(汪永明), Tang Wencheng, Yu Xiaoliu, Wang Yongming, Tang WC(汤文成), Yu XL(余晓流)   +5 more
core   +1 more source

De Novo Autogenic Engineered Living Functional Materials

Advanced Materials, EarlyView.
A versatile platform for de novo autogenic engineered living materials is presented, leveraging protein mining, computational modeling, and synthetic biology. By reprogramming the Escherichia coli curli machinery with β‐solenoid proteins from non‐model bacteria, macroscopic biomaterials with enhanced mechanical properties, UV‐C irradiation protection ...
Hoda M. Hammad, Seth Swarnadeep, Erin C. Jackson, Nicolas Burns, Hongyu Wang, Harrison Priode, Robert B. Moore, Sanket Deshmukh, Avinash Manjula‐Basavanna, Anna M. Duraj‐Thatte   +9 more
wiley   +1 more source

Electrochromic Adaptive Solar Heater and Sub‐Ambient Passive Daytime Radiative Cooler

Advanced Materials, EarlyView.
An electrochromic Cu–Bi nanocluster device dynamically switches between solar heating and daytime sub‐ambient radiative cooling without mechanical motion. Defect‐activated graphene, minimized electrolyte loss, and pulse‐assisted reversible electrodeposition enable opposite solar and mid‐infrared modulation in one opaque platform, establishing a design ...
Chenxi Sui, Qizhang Li, Yu Han, Xinyu Dou, Gangbin Yan, Jiadong Liu, Blake Harris, Jinlei Li, Alexander S. Filatov, Qingsong Fan, Ching‐Tai Fu, Po‐Chun Hsu   +11 more
wiley   +1 more source

A Squirrel-cage Globoidal Cam Planetary Mechanism

Jixie chuandong, 2020
The globoidal cam planetary mechanism is difficult to machine， the assembly precision is difficult to guarantee， and its manufacturing cost is high. These problems are caused by the toroidal structure of the outer annulus cam. A new type of squirrel-cage
Gong Yan, Cao Jujiang, Zhang Yanhua
doaj