Results 81 to 90 of about 12,224 (294)

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Resolving the Cu(bdc) Conundrum: Identifying Non‐Porous Packing of Prototypical Coordination‐Network Thin Films Combining Advanced Diffraction Techniques and Computational Modelling

Advanced Functional Materials, EarlyView.
Solution‐processed Cu(bdc) forms prototypical MOF thin films for which a multitude of not fully satisfactory structural models have been suggested. Combining rotating grazing‐incidence diffraction and X‐ray reflectivity on two complementary samples with density‐functional theory, we first discard the previously suggested models and then identify a non ...
Narges Taghizade, Mario Fratschko, Robbin Steentjes, Mercedes Linares‐Moreau, Paolo Falcaro, Christof Wöll, Roland Resel, Egbert Zojer   +7 more
wiley   +1 more source

Satellite constellation design and radio resource management using genetic algorithm.

, 2018
A novel strategy for automatic satellite constellation design with satellite diversity is proposed. The automatic satellite constellation design means some parameters of satellite constellation design can be determined simultaneously. The total number of
Asvial, Muhamad.
core   +1 more source

Fuel Consumption and Collision Avoidance Strategy in Multi-static Orbit Formations

, 2011
This paper analysesthe fuel consumption of interferometric rader missions employing small satellite formations like, e.g., Cross-track pendulum, Cartwheel, CarPe, or Trinodal Pendulum.
H. Fiedler, E.F. Jochim, Fiedler, Hauke, G. Krieger, Krieger, Gerhard, Jochim, Fritz   +5 more
core   +1 more source

An S-band multimode reflector antenna for a satellite constellation tracking system. [PDF]

Sci Rep, 2023
Wu H, Ren Y, Wang Y, Zhang K.
europepmc   +1 more source

Long‐Range Coordination Environment Modulates Single‐Atom Local States and Systemic Impact on CO2 Photoconversion

Advanced Functional Materials, EarlyView.
Terminal groups on Cu porphyrins modulate the electronic states of single‐atom Cu centers through a long‐range electronic effect, without altering the Cu coordination geometry. Meanwhile, a multi‐descriptor framework is established that incorporates porphyrin regulation, hybrid catalyst properties, and CO2 photoreduction capabilities.
Yi Zhang, Jintao Dong, Xiahe Chen, Xiyang Wang, Tiange Wei, Yue Zhu, Tai‐Sing Wu, Yun‐Fang Yang, Shao‐Yuan Leu, Keke Wang, Yuanbin She, Huaming Li, Jiexiang Xia, Molly Meng‐Jung Li   +13 more
wiley   +1 more source

TanDEM-X Experiments in Pursuit Monostatic Configuration

, 2012
This paper reports on several experiments performed by the TanDEM-X constellation that could be potentially implemented as operational modes in future SAR missions.
Steinbrecher, Ulrich, Wollstadt, Steffen, Baumgartner, Stefan, Krieger, Gerhard, Schulze, Daniel, Mittermayer, Josef, Zink, Manfred, Moreira, Alberto, Prats, Pau, Reigber, Andreas, Scheiber, Rolf, López-Dekker, Francisco, Rodríguez-Cassolà, Marc   +12 more
core  

Security Performance Analysis of LEO Satellite Constellation Networks under DDoS Attack. [PDF]

Sensors (Basel), 2022
Zhang Y, Wang Y, Hu Y, Lin Z, Zhai Y, Wang L, Zhao Q, Wen K, Kang L.   +8 more
europepmc   +1 more source

Tailoring Li‐ion Storage and Transport in Two‐Dimensional Conjugated Metal‐Organic Frameworks via Precise Nitrogen Incorporation

Advanced Functional Materials, EarlyView.
Two nitrogen‐doped 2D conjugated metal‐organic frameworks (2D c‐MOFs, namely Cu‐Nx‐OHBA, x = 2 or 4) are synthesized, featuring precise nitrogen incorporation via rational ligand design. The Cu‐Nx‐OHBA 2D c‐MOFs are largely tailorable by varying skeletal nitrogen density, with respect to electrical conductivity, Li‐storage capacitance, and Li‐transport
Xiangyu Li, Shaoze Shi, Fucai Cui, Rashid Iqbal, Pengyu Wang, Tianrui Wu, Jingcheng Hao, Renhao Dong   +7 more
wiley   +1 more source

Design of micro-satellite constellation for communication

, 2010
碩士本文主要探討通訊星系以對稱型及不對稱型星系設計，任務需求以台灣為中心，模擬半徑1000公里，做軌道高度800及1500公里，並延伸半徑範圍：分別為500 km、1000km、1500 km、2000km、2500 km任務範圍探討；以及利用不對稱方式的高低配單一傾角及利用圓軌道的特性、傾角的變化做星系設計，以衛星高度800公里搭配衛星高度1500公里，分析各不同半徑範圍，探討最少衛星顆數之差異性。 得知軌道高度800km時，傾角30ﾟ、31ﾟ、33ﾟ、 34ﾟ時，滿足任務需求即時通訊 ...
張博鈞; Chang, Bo-jyun
core