Results 111 to 120 of about 21,151,583 (337)

Planetary stewardship in an urbanizing world: beyond city limits [PDF]

, 2012
Cities are rapidly increasing in importance as a major factor shaping the Earth system, and as such must take corresponding responsibility. With currently over half of the world population, cities are supported by resources originating from primarily ...
Elmqvist, Thomas, Lorraine Sugar, Svedin, U., Elmqvist, T., Mbow, Cheikh, Sinclair, Paul, Stafford-Smith, M., Shobhakar, Dhakal, Cheikh Mbow, Steffen, Will, Alfsen, Christine, Neda Farahbakhshazad, Uno Svedin, Gaffney, O., Biermann, F.H.B., Dearing, J.A., McMichael, A.J., Stafford Smith, M., Ninad R. Bondre, Adbullah, Saiful Arif, Haberl, H., Crumley, Carole, Pinho, Patricia Fernanda, Sinclair, Paul,, Biermann, Frank, McMichael, Anthony J., Olsson, P., Broadgate, Wendy J., Morais, J., Haberl, Helmut, Joao M. F. deMorais, Christine Alfsen, Seitzinger, Sybil P., Farahbakhshazad, N., Svedin, Uno, Patricia Fernanda Pinho, Deutsch, Lisa, Dearing, John A., Olsson, Per, Lavorel, S., deMorais, Joao M.F., Frank Biermann, Saiful Arif Abdullah, Sugar, Lorraine, Will Steffen, Crumley, Carole L.,, Dhakal, S., Smith, Mark Stafford, Steffen, W., Biermann, F., Dhakal, Shobhakar, Abdullah, Saiful Arif, Per Olsson, Seto, K.C., Crumley, C.L., Shobhakar Dhakal, Pinho, P, Bondre, Nanid R., Bondre, N.R., deMorais, Joao M. F., Farahbakhshazard, N., Pinho, P., Gaffney, Owen, Wendy J. Broadgate, Paul Sinclair, Deutsch, L., Karen C. Seto, Broadgate, W.J., Sybil P. Seitzinger, Lavorel, Sandra, Abdullah, S.A., Seitzinger, S.P., Alfsen, C., Lisa Deutsch, Farahbakhshazad, Neda, Seto, Karen C., Owen Gaffney, Sandra Lavorel, Sugar, L., Helmut Haberl, Bondre, Ninad R., John A. Dearing, Mbow, C., Sinclair, P., Crumley, C., Demorais, J.M., Thomas Elmqvist, Pinho, P.F., Mbow, Cheik, Anthony J. McMichael, Carole L. Crumley, Mark Stafford Smith, Crumley, Carole,, Sveriges lantbruksuniversitet., Biermann, Frank,, Bondre, Nanid R.,, deMorais, Joao M.F.,, Seitzinger, Sybil P.,, Deutsch, Lisa,, Haberl, Helmut,, Alfsen, Christine,, Seto, Karen C.,, Olsson, Per,, Smith, Mark Stafford,, Adbullah, Saiful Arif,, McMichael, Anthony J.,, Dearing, John A.,, Broadgate, Wendy J.,, Farahbakhshazad, Neda,, Gaffney, Owen,, Sugar, Lorraine,, Mbow, Cheik,, Shobhakar, Dhakal,   +112 more
core   +1 more source

Phase‐Engineered MoS2 Quantum Monolayer Catalysts

Advanced Materials, EarlyView.
A new type of catalyst model—phase‐engineered MoS2 quantum‐monolayer catalyst (∼0.8 nm thick, < 6 nm in the lateral size; switchable freely among metallic 1T, semiconducting 2H, and a hybrid phase of metallic‐semiconducting 1T‐2H)—is reported. It can efficiently and stably drive photochemical H2, syngas and ammonia synthesis as a catalyst or co ...
Ruijie Yang, Yingying Fan, Lillian Pernitsky, Mojtaba Ebrahimian Mashhadi, Ningxin Chen, Md. Mehadi Hassan, Zheng Li, Heng Zhao, Liang Mei, Zhiyuan Zeng, Zhangxing Chen, Jinguang Hu, Qingye Lu   +12 more
wiley   +1 more source

Time-varying meshing characteristics and global dynamic evolution of planetary gear systems considering ring gear flexibility

Results in Engineering
The planetary gear system exhibits pronounced time-varying meshing and nonlinear dynamic characteristics under high load conditions and complex operating environments.
Lei-Hao Li, Shi-chuang Liu, Hao Han
doaj   +1 more source

Biomass DNA: An Emerging Building Block for Advanced Materials

Advanced Materials, EarlyView.
Biomass DNA is rapidly emerging from its traditional role as a genetic blueprint to serve as a versatile abundant, highly programmable polymeric building block. This review highlights the transformation of macroscopic bulk biomass DNA into next generation of functional materials, spanning from dynamic hydrogels, sustainable bioplastics, and high ...
Yuwei Hu, Itamar Willner, Li Niu
wiley   +1 more source

Secular Evolution of Planetary Systems in Binaries

, 2007
The orbital eccentricity of a single planet around a component of a stellar binary system with a sufficiently large mutual inclination angle is known to oscillate on a secular timescale through the Kozai mechanism. We have investigated the effects of the Kozai mechanism on double-planet systems in binaries.
Takeda, Genya, Kita, Ryosuke, Rasio, Frederic A., Rubinstein, Samuel M.   +3 more
openaire   +2 more sources

Synthesis of Ti2B2Clx MBenes in Molten Salts From Theoretical and Experimental Perspectives

Advanced Materials, EarlyView.
By integrating a theoretical framework with experiments, Ti2InB2 was selectively etched with ZnCl2 to produce a multilayer (ml) Ti2B2Clx MBene. The In atoms are completely removed, with simultaneous incorporation of chlorine surface terminations. in situ x‐ray diffraction indicates a direct biphasic transformation from Ti2InB2 to ml‐MBene, with no ...
Rodrigo M. Ronchi, Emile Defoy, Andrejs Petruhins, Justinas Palisaitis, Leiqiang Qin, Joseph Halim, Lianghao Yu, Lan Tang, Solenn Reguer, Dominique Thiaudière, Ningjun Chen, Durga Sankar Vavilapalli, David Portehault, Jonas Björk, Per O. Å. Persson, Johanna Rosen   +15 more
wiley   +1 more source

No Giant Planets in the Eta Cassiopeiae System: Dynamical Implications of a Wide Binary Companion

The Astronomical Journal
Given the vast number of stars that exist within binary systems, it remains important to explore the effect of binary star environments on the formation and evolution of exoplanetary systems.
Stephen R. Kane, Zhexing Li, Michelle L. Hill, Skylar D’Angiolillo, Benjamin J. Fulton, Andrew W. Howard   +5 more
doaj   +1 more source

Near‐Infrared Imaging of H2O2 in Plants With Nanosensors Under Environmentally Changing Conditions

Advanced Materials, EarlyView.
This paper reports a ratiometric nanosensor enabling robust, multivariate detection of stress signals (H2O2) in plants, with high resistance to light fluctuations and mechanical disturbances. Single‐walled carbon nanotubes serve as the sensor, Egyptian Blue nanosheets serve as a stable reference, and plant autofluorescence serves as a label‐free ...
Jiaqi Li, Bjoern F. Hill, Chen Ma, Juliana Gretz, Tanuja Kistwal, Janus A. C. Wartmann, Justus T. Metternich, Juan Pablo Giraldo, Sebastian Kruss   +8 more
wiley   +1 more source

Fatigue life analysis and prediction of planetary gear bearings in electromechanical composite transmission systems

Jixie qiangdu
To address the problems of unclear internal load evolution law of the electromechanical composite transmission system for high-speed tracked vehicles and the lack of fatigue life prediction method for planetary gear bearings, a dynamic model of planetary
GAI Jiangtao, LI Shujun, ZHANG Qiang
doaj  

Tidal dissipation in stars and fluid planetary layers and its impact on the evolution of star-planet systems

EPJ Web of Conferences, 2015
Tidal dissipation in stars and planets is one of the key physical mechanisms that drive the evolution of planetary systems. It intrinsically depends on the nature of the tidal response of celestial bodies, which is directly linked to their internal ...
Auclair-Desrotour P., Mathis S., Poncin-Lafitte C. Le   +2 more
doaj   +1 more source