Results 61 to 70 of about 481,793 (353)

The NASA Carbon Airborne Flux Experiment (CARAFE): instrumentation and methodology [PDF]

Atmospheric Measurement Techniques, 2018
The exchange of trace gases between the Earth's surface and atmosphere strongly influences atmospheric composition. Airborne eddy covariance can quantify surface fluxes at local to regional scales (1–1000 km), potentially helping to bridge gaps between
G. M. Wolfe, G. M. Wolfe, S. R. Kawa, T. F. Hanisco, R. A. Hannun, R. A. Hannun, P. A. Newman, A. Swanson, A. Swanson, S. Bailey, J. Barrick, K. L. Thornhill, G. Diskin, J. DiGangi, J. B. Nowak, C. Sorenson, G. Bland, J. K. Yungel, C. A. Swenson   +18 more
doaj   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

EASA’s “Open” Category for Military UAS: Opportunities and Limitations in the Field of Airworthiness

Aerospace, 2018
The European Aviation Safety Agency (EASA) plans to establish a sole risk-based set of regulations for drones to grant access to European airspace, thus opening a multibillion-euro market.
Oliver Hirling, Florian Holzapfel
doaj   +1 more source

Multi-decadal records of stratospheric composition and their relationship to stratospheric circulation change [PDF]

Atmospheric Chemistry and Physics, 2017
Constituent evolution for 1990–2015 simulated using the Global Modeling Initiative chemistry and transport model driven by meteorological fields from the Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2) is ...
A. R. Douglass, S. E. Strahan, S. E. Strahan, L. D. Oman, R. S. Stolarski   +4 more
doaj   +1 more source

In Situ 3D Bioprinting: Impact of Cross‐Linking on the Adhesive Properties of Hydrogels

Advanced Functional Materials, EarlyView.
In situ 3D bioprinting enables the direct deposition of cell‐laden, adhesive biomaterials for on‐site tissue regeneration. This review provides a comprehensive overview of how cross‐linking influences the bioadhesive properties of hydrogels used in 3D bioprinting, highlighting cross‐linking triggers, bioadhesion mechanisms, polymer interpenetration ...
Odile Romero Fernandez, Mulazim Hussain Asim, Shumaila Arshad, Gergely Kali, Andreas Bernkop‐Schnürch   +4 more
wiley   +1 more source

Advances in understanding autogyro flight dynamics [PDF]

, 2008
A comprehensive flight dynamics study of the autogyro is presented in this paper. A state of the art generic simulation of the vehicle type was developed and validated against flight data.
Houston, S., Thomson, D.G.
core  

Interfacial and Crystallographic Regulation of Zinc Anode via Electric Double Layer Reconstruction for Highly Stable Zn Anode

Advanced Functional Materials, EarlyView.
Trace amounts of perfluoro‐1‐butanesulfonyl fluoride enables the regulation of the Zn/electrolyte interface by the generated zincophilic ─SO3H groups with long hydrophobic ─CF2 tails, which adsorb strongly onto the Zn surface, displace water molecules from the inner Helmholtz plane, and reconstruct the electrical double‐layer structure.
Dinesh Patel, Yimei Chen, Ashwini Kumar Sharma, Xiaolei Wang   +3 more
wiley   +1 more source

Multistage Cooperative Trajectory Planning for Multimissile Formation via Bi-Level Sequential Convex Programming

IEEE Access, 2020
Owing to the highly nonlinear dynamics and high number of nonlinear constraints, it is exceedingly difficult and computationally expensive to solve the cooperative trajectory planning problem of multimissile formation using existing approaches.
Chaoyue Liu, Cheng Zhang, Fenfen Xiong
doaj   +1 more source

Bio‐Inspired Multimodal Hardware Front‐End Enabled by 2D Floating‐Gate Memory for UAV Perception

Advanced Functional Materials, EarlyView.
A MoS2/h‐BN /graphene floating‐gate memory underpins a bio‐inspired multimodal front end that integrates visual, inertial, and airflow cues. A 4 × 4 FG memory array encodes temporal intensity differences, while IMU‐ and airflow‐driven threshold modulation suppresses self‐motion artifacts, enabling fast, low‐power, robust autonomous UAV tracking and ...
Lianghao Guo, Yue Cheng, Cong Li, Xiaoyu Guo, Jiankai Yin, Dadong Fan, Zhenyu Xu, Chenyu Tang, Arokia Nathan, Shuo Gao, Li Tao, Luigi G. Occhipinti   +11 more
wiley   +1 more source

Practical System Identification and Incremental Control Design for a Subscale Fixed-Wing Aircraft

Actuators
An incremental differential proportional integral (iDPI) control law using eigenstructure assignment gain design is tested in flight on a subscale platform to validate its suitability for fixed-wing flight control.
Rasmus Steffensen, Kilian Ginnell, Florian Holzapfel   +2 more
doaj   +1 more source