Results 81 to 90 of about 3,370,338 (297)

The topology of non-linear global carbon dynamics: from tipping points to planetary boundaries

Environmental Research Letters, 2013
We present a minimal model of land use and carbon cycle dynamics and use it to explore the relationship between non-linear dynamics and planetary boundaries.
J M Anderies, S R Carpenter, Will Steffen, Johan Rockström   +3 more
doaj   +1 more source

Multilayer Biobased Poly(ethylene furanoate)/Graphene Oxide Nanofibrous Membranes With Directional Water Transport for Efficient Microplastics Filtration

Advanced Materials Technologies, EarlyView.
A self‐assembled multilayer biobased PEF/GO nanofibrous membrane was developed by electrospinning for efficient PLA microplastics (MPs) filtration. The membrane combines superhydrophilicity, directional water transport, mechanical robustness, and a synergistic size‐exclusion interception and electrostatic repulsion MPs separation mechanism, enabling ...
Juraij Kandiyil, Sumayya Ansari, Prasanna Kumar S Mural, Yaser E. Greish, Adnan Younis, Akmal Nazir, Muhammad Z. Iqbal   +6 more
wiley   +1 more source

Climate effects of a future net forestation scenario in CMIP6 models

npj Climate and Atmospheric Science
Forestation may reduce temperatures by lowering atmospheric CO2. However, biogeophysical changes from forestation may weaken this cooling. We use twelve Coupled Model Intercomparison Project (CMIP6) models to quantify the biogeochemical (carbon cycle ...
James L. Gomez, Robert J. Allen, Larry W. Horowitz, Steven T. Turnock, Rosie A. Fisher, Olivia E. Clifton, Bryan K. Mignone, Elena Shevliakova, Sergey Malyshev   +8 more
doaj   +1 more source

Ultra‐White Elastomeric Coatings for Daytime Radiative Cooling

Advanced Materials Technologies, EarlyView.
Passive daytime radiative cooling meets elasticity in a new class of ultra‐white silicone coatings. Combining high solar reflectance with strong sky‐window emission, they hold surfaces below ambient temperature under full sunlight while remaining flexible and stretchable. This combination of cooling performance and mechanical flexibility enables energy‐
Abdulrahman Aljwirah, Xiaojie Liu, Khalid Alhammadi, Orlando G. Rivera Gonzalez, Won‐June Lee, Xiulin Ruan   +5 more
wiley   +1 more source

Analysis of the Dynamic Load Sharing Characteristic of Two-stage Planetary Transmission

Jixie chuandong, 2016
To study the dynamic load sharing characteristics of two- stage planetary gear train,a translation- torsion coupling dynamics model is established by taking the nonlinear factors like time- varying mesh stiffness,position error,eccentric error,gear ...
Li Siqian, Wu Shijing, Wang Xiaosun
doaj  

Ocean dynamics shape marine heatwaves and their predictability

Nature Communications
Marine heatwaves have become more frequent and intense under anthropogenic warming, posing increasing threats to marine ecosystems and coastal societies, necessitating a better understanding of their mechanism and predictability.
Xianglin Ren, Wei Liu, Liping Zhang
doaj   +1 more source

Research of Load Sharing Performance of Hub Reducer with Considering the Flexible of Planetary Pin

Jixie chuandong, 2020
Taking the distributed electric drive hub reducer as study object，by using the FEA method, the support stiffness of the planetary wheel bearing and the flexible pin is solved.
Li Xuan
doaj  

Programmable Variable‐Stiffness Multilayer Elastomer Composites With High‐Aspect‐Ratio Low‐Melting‐Point Alloy Inclusions

Advanced Materials Technologies, EarlyView.
High‐aspect‐ratio low‐melting‐point alloy inclusions are embedded within multilayer silicone laminates to create thermally programmable stiffness. Sequential activation of alloy‐rich layers produces four distinct mechanical states and reconfigures tendon‐driven actuator trajectories under the same load.
Palpolage Don Shehan Hiroshan Gunawardane, Gyan Edbert Zesiro, Hao Zhou, Gursel Alici, Mu Chiao   +4 more
wiley   +1 more source

轮边减速器行星齿轮结构动力学分析

Jixie chuandong, 2011
Using 3D modeling software,geometric model of the wheel planetary gear reducer structure is established,based on heavy-duty truck wheel reducer planetary gear structure and the loading characteristics,a planetary gear structure of three-dimensional ...
王铁, 柴少彪
doaj  

Hybrid Additive Manufacturing of Highly Stretchable Bottlebrush Polymer Nanocomposites by Decoupled Extrusion and Photopatterning

Advanced Materials Technologies, EarlyView.
A Hybrid Direct Ink Writing–Digital Light Processing (HDD) strategy decouples material extrusion from shape definition, enabling high‐fidelity additive manufacturing of highly viscous, yield‐stress polymer nanocomposites. Excess ink acts as a removable, self‐supporting scaffold, allowing fabrication of unsupported and embedded complex architectures ...
Shahryar Ramezani Bajgiran, Emmanuel Oduro, Daniel A. Rau, Li‐Heng Cai   +3 more
wiley   +1 more source