Results 91 to 100 of about 124,669 (249)

3D Numerical Simulation of Rock Cutting of an Innovative Non-Planar Face PDC Cutter and Experimental Verification

Applied Sciences, 2019
The low rock breaking efficiency of conventional polycrystalline diamond compact (PDC) bits in hard abrasive formations prompts the development of PDC cutting elements from the planar structure to the non-planar structure.
Jianxun Liu, Hualin Zheng, Yuchun Kuang, Han Xie, Chao Qin   +4 more
doaj   +1 more source

Electronic Synergy in NiCo‐Embedded Nitrogen‐Doped Hollow Mesoporous Carbon Spheres for Bifunctional Oxygen Catalysis and Zinc–Air Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study employs a hard‐templating etching strategy to synthesize N‐doped hollow mesoporous carbon spheres embedded with NiCo nanoparticles (denoted as NiCo@N‐HMCS). The optimized catalyst exhibits exceptional bifunctional catalytic activity for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline media, achieving a ...
Pengyu Tan, Jianwei Lu, Yimin Chen, Kaiwen Yang, Kun Luo, Dan Liu, Weiwei Lei   +6 more
wiley   +1 more source

Kinetics of the permanent deactivation of the boron-oxygen complex in crystalline silicon as a function of illumination intensity

AIP Advances, 2017
Based on contactless carrier lifetime measurements performed on p-type boron-doped Czochralski-grown silicon (Cz-Si) wafers, we examine the rate constant Rde of the permanent deactivation process of the boron-oxygen-related defect center as a function of
Verena Steckenreiter, Dominic C. Walter, Jan Schmidt   +2 more
doaj   +1 more source

Elucidating the Role of Alkali-Metal Cations in Nickel Oxide OER Catalysts Under Mild pH Conditions by Operando X-Ray Absorption Spectroscopy. [PDF]

ChemSusChem
Nickel oxide catalysts electrodeposited from carbonate buffer solutions containing various alkali‐metal cations (Li+, Na+, K+, Cs+) under mild pH conditions were investigated by operando X‐ray absorption fine structure (XAFS) analysis. The results reveal that although all catalysts converge to a common γ‐NiOOH active phase under OER conditions, K+ and ...
Age Y, Tsunekawa S, Sakai A, Harada K, Ishihara R, Ina T, Wang KH, Yoshida M.   +7 more
europepmc   +2 more sources

Market Power of the German Beer Industry on Export Markets - An Empirical Study - [PDF]

In this paper the existence and magnitude of market power for the German beer exporters is tested. Two theoretical approaches to model incomplete competition on international markets are employed, the ?pricing to market?
Glauben, Thomas, Loy, Jens-Peter
core  

Nanocubes and Cuboctahedra: Entropic Stabilization Versus Thermal Segregation in Rock Salt‐ and Spinel‐Type Multinary Oxides from Spray‐Flame Synthesis

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Spray‐flame synthesis enables highly flexible and scalable production of multinary and high‐entropy oxide nanoparticles due to high synthesis temperatures with subsequent quenching. Temperature‐dependent in situ diffraction of as‐synthesized materials clearly reveals entropy stabilization in rock salt lattices, while spinels—featuring tetrahedral and ...
Mohammed‐Ali Sheikh, Steven Angel, Sabrina Schleich, Leon Müller, Jan Ternieden, Hatem M. A. Amin, Christof Schulz, Hartmut Wiggers   +7 more
wiley   +1 more source

The psychometric properties of a new oral health illness perception measure for adults aged 62 years and older.

PLoS ONE, 2019
BackgroundBased on the Common-Sense Model of Self-Regulation (CSM), a new integrated Illness Perception Questionnaire Revised for Dental Use in Older/Elder Adults (IPQ-RDE) was developed for single and multiple dental conditions.
Suchitra Nelson, Jeffrey M Albert, Yiying Liu, David Selvaraj, Shelley Curtan, Kelli Ryan, Andres Pinto, Farida Ejaz, Peter Milgrom, Christine Riedy   +9 more
doaj   +1 more source

Metal‐Free Halogen‐Engineered Carbon Nanotubes for Highly Efficient Oxygen Reduction Reaction

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
In work employs density functional theory screening to guide the halogen engineering of metal‐free, Cl‐mediated carbon nanotubes for a highly efficient oxygen reduction reaction (ORR). Cl‐mediation optimally tunes the electronic structure and binding energies of oxygen intermediates, delivering an ORR activity rivaling that of commercial Pt/C, high 4e−
Kai Zhao, Mengni Liu, Xia Zhang, Fucheng Wu, Linfeng Li, Yuxiao Liu, Muhammad Humayun, Hussein A. Younus, Xinying Xue, Sadegh Rostamnia, Jian Xia, Chundong Wang   +11 more
wiley   +1 more source

Recursive Differential Evolution Algorithm for Inertia Parameter Identification of Space Manipulator

International Journal of Advanced Robotic Systems, 2016
This paper proposes a recursive differential evolution (RDE) algorithm to identify the inertial parameters of an unknown target and simultaneously revise the friction parameters of space manipulator joints.
Zhengxiong Liu, Panfeng Huang, Zhenyu Lu
doaj   +1 more source

Visual Patterns of Diaphragmatic Motion in Acute Respiratory Failure: A Prospective Pilot Study

Journal of Clinical Ultrasound, Volume 53, Issue 3, Page 421-428, March/April 2025.
In this prospective bicentric study, we studied the relationship between the appearance of diaphragmatic motion and the etiological diagnosis of patients admitted to the emergency department with ARF. We observed a different visual pattern in patients with pneumonia. This is an interesting result as it allows the diagnosis of pneumonia without the need
Thibaut Markarian, Matthieu Daniel, Kevin Guillemet, Florian Ajavon, Florent Femy, Romain Genre Grandpierre, Anne‐Laure Feral‐Pierssens, Xavier Bobbia   +7 more
wiley   +1 more source