Results 41 to 50 of about 851,798 (262)

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source

Determination of Vibration Properties and Reliable Frequency Estimation for Synchronous Vibrations Through Improved Blade Tip Timing Techniques Without a Once-per-Revolution Sensor

Sensors
Synchronous vibrations, which are caused by periodic excitations, can have a severe impact on the service life of impellers. Blade Tip Timing (BTT) is a promising technique for monitoring synchronous vibrations due to its non-intrusive nature and ability
Marios Sasakaros, Luca Mann, Markus Schafferus, Manfred Wirsum   +3 more
doaj   +1 more source

Development of excitation test method for non-synchronous vibration of rotating turbine blade (Measurement of damping of non-synchronous vibration mode)

Nihon Kikai Gakkai ronbunshu, 2016
In order to analyze the blade vibration caused by flutter, it is necessary to understand both the aerodynamic damping and structural damping of the high vibration stress. Flutter Vibration mode occurring in the rated speed is non-synchronous mode.
Ryou AKIYAMA, Koki SHIOHATA, Tomomi NAKAJIMA, Yutaka YAMASHITA   +3 more
doaj   +1 more source

Analysis of validity, practicality, and readability of islamic STEAM activity storybook for early childhood

Al-Athfaal, 2022
So far, separating science and religion has brought the world into chaos. In contrast, science and religion do not need to be a dichotomy because they can be integrated constructively to solve problems in human life.
Yahya Azis, Kartika Metafisika, Frida Anggraeni Ayu Lestari, Lisa Asistiana   +3 more
doaj   +1 more source

Soft Ionic and Electronic Triboelectric Nanogenerators: Toward Attachable and Implantable Biomedical Applications

Advanced Materials, EarlyView.
This review provides an overview of triboelectric nanogenerator (TENG)–based biomedical applications by classifying studies into electronic and ionic systems across attachable and implantable platforms. It summarizes key material choices, device structures, and working mechanisms that characterize current TENG‐based research, and outlines six future ...
Kyongtae Choi, Jimin Park, Won Jun Song, Soohwan An, Seonggyu Choe, Byeong‐Rak Keum, Min Young Kim, Dae Hee Hwang, Young‐Geun Park, Sung‐Won Kim, Sangyul Baik, Gwang‐Bum Im, Younghoon Lee   +12 more
wiley   +1 more source

Effect of heat treatment environment on mechanical properties and microstructure of alumina fibers

Cailiao gongcheng, 2023
Continuous alumina fiber-reinforced ceramic matrix composites are one of the ideal thermal structural materials for aerospace applications. Mechanical properties of composites in different environments depend on the mechanical properties of continuous ...
SUN Jingwei, WANG Honglei, YANG Rui, ZHOU Xingui   +3 more
doaj   +1 more source

Hydrogen production by sorption-enhanced steam reforming of glycerol [PDF]

, 2009
Catalytic steam reforming of glycerol for H(2) production has been evaluated experimentally in a continuous flow fixed-bed reactor. The experiments were carried out under atmospheric pressure within a temperature range of 400-700 degrees C.
Blakeman, N, Chen, H, Ding, Y, Dou, B, Dupont, V, Ghadiri, M, Rickett, G, Williams, PT   +7 more
core   +1 more source

Pulsed Electrolysis Prevents Sulfur Poisoning for Sustained Sulfide Valorization

Advanced Materials, EarlyView.
Integrating pulsed electrolysis with Sc‐doped NiFe‐LDH enables sustainable sulfide valorization, achieving >500 h stability, 99.8% efficiency. Moreover, this technology produces high‐purity sulfur and sodium formate, boosting profit by 121% to $1,294.7 per tonne of hydrogen.
Zhiyan Hou, Yangbo Ma, Yufeng Wu, Weijin Cao, Zhengxiao Guo, Changlong Wang   +5 more
wiley   +1 more source

A Thermodynamic-Based Black-Box Modeling Approach for the Comprehensive Analysis of Vortex Tube Applications

Energies
To combat climate change successfully, enhancing existing processes is imperative alongside exploring new regenerative technologies. For this purpose, new components must be considered to improve the efficiency of thermodynamic processes.
Robert Sager, Nils Hendrik Petersen, Manfred Wirsum   +2 more
doaj   +1 more source

Simple prediction method of unstable fluid force in turbine blade row of steam turbine

Nihon Kikai Gakkai ronbunshu, 2016
Unstable fluid force may be induced by rotor blade eccentricity in turbo machinery such as steam turbines. To develop a prediction method for unstable fluid force in turbine blade rows, we calculated the fluid force by using computational fluid dynamics (
Kiyoshi YABATA, Kazuyuki YAMAGUCHI, Kenichi MURATA   +2 more
doaj   +1 more source