Results 141 to 150 of about 8,979 (244)

Changes in saddle setback and intensity affect comfort and lower limb kinematics in recreational cyclists. [PDF]

Sci Rep
Encarnación-Martínez A, Rizo-Albero J, Pérez-Soriano P.   +2 more
europepmc   +1 more source

Recent Advances in Tailoring Active Site Microenvironments of Fe–N–C Catalysts for Oxygen Reduction

ChemistryEurope, EarlyView.
This review summarizes the main factors affecting Fe–N–C catalysts for ORR: activity depends on active site structure, electronic configuration, and porosity, while stability is limited by metal leaching, carbon degradation, and inactive phase formation.
Mudassar Maqsood, Lebin Cai, Samona Zahid, Zhuangzhi Sun, Jianrui Zhang, Bao Yu Xia, Yaqiong Su   +6 more
wiley   +1 more source

Quantum Zeno Dynamics of two interacting particles. [PDF]

Sci Rep
Abyaneh V, Ghorbani P.
europepmc   +1 more source

Electrophilic Functionalization of Donor‐Stabilized Phosphanylboranes: A New Pathway toward Heavy 13/14/15 Parent Hydride‐Containing Compounds

ChemistryEurope, EarlyView.
A new way of obtaining mixed 13/14/15 hydride containing compounds stabilized only by a Lewis base is presented. The functionalization of IDipp·BH2PH2 (IDipp = 1,3‐Bis‐(2,6‐diisopropylphenyl)‐imidazolin‐2‐ylidene) by main group electrophiles leads to the formation of the compounds [IDipp·BH2PH2E]+ [E = H, CH3 SiEt3, Ge(SiMe3)3, SnMe3) which represent a
Robert Szlosek, Michael Seidl, Christoph Riesinger, Lisa Zimmermann, Amelie Sophie Niefanger, Christian Marquardt, Alexey Y. Timoshkin, Manfred Scheer   +7 more
wiley   +1 more source

Comparison of muscular activity and metabolic response between a novel handle-based and a push-rim wheelchair in a simulated daily mobility circuit. [PDF]

J Rehabil Med
Aronis G, Pfau S, Abass M, Angeli T, Gföhler M.   +4 more
europepmc   +1 more source

Optimization of 3D‐Printed Structured Packings—Current State and Future Developments

Chemie Ingenieur Technik, EarlyView.
This paper gives an overview about structured packing development for distillation, surveying heuristic development cycles, computational fluid dynamics simulations, and additive manufacturing techniques. The emerging application of shape optimization to improve packings is emphasized, and its benefits, impact, and limitations are discussed.
Dennis Stucke, Sebastian Blauth, Christian Leithäuser, Thomas Grützner   +3 more
wiley   +1 more source

The Structural Design and Optimization of a Novel Independently Driven Bionic Ornithopter. [PDF]

Biomimetics (Basel)
Dai M, Wu R, Ye M, Gao K, Chen B, Tao X, Fan Z.   +6 more
europepmc   +1 more source

Advanced control of non‐isothermal axial dispersion tubular reactors with recycle‐induced state delay

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract We develop a delay‐aware estimation and control framework for a non‐isothermal axial dispersion tubular reactor modelled as a coupled parabolic‐hyperbolic PDE system with recycle‐induced state delay. The infinite‐dimensional dynamics are preserved without spatial discretization by representing the delay as a transport PDE and adopting a late ...
Behrad Moadeli, Stevan Dubljevic
wiley   +1 more source

The Crank [PDF]

Scientific American
openaire   +2 more sources

Effects of crank length on cycling efficiency, sprint performance, and perceived fatigue in high-level amateur road cyclists. [PDF]

J Exerc Sci Fit
Li J, Wang Q, Zhang Y, Zhang L, Dong G, Ma G, Peng S, Wang B, Wang J, Zhou J, Bao D.   +10 more
europepmc   +1 more source