Results 61 to 70 of about 77,563 (254)

Structure of Stationary Photodissociation Fronts [PDF]

, 1996
The structure of stationary photodissociation fronts is revisited. H_2 self- shielding is discussed, including the effects of line overlap. We find that line overlap is important for N(H_2) > 10^{20} cm^{-2}.
Bertoldi, Frank, Draine, B. T.
core   +3 more sources

Three‐Dimensional Hierarchical Nanowire‐Networks with Deep‐Focus Tolerance and Adhesion Robustness for Harsh‐Environment SERS Sensing

Advanced Functional Materials, EarlyView.
A 3D nanowire‐network SERS substrate with robust adhesion is developed, featuring pronounced z‐direction optical activity, ultralow detection limit (1.5 × 10−13 M), and excellent signal uniformity (RSD < 10%). Enabled by enhanced light scattering, increased optical density of states, and structural reinforcement, the substrate demonstrates stable, high‐
Jinglai Duan, Wentao Wang, Xiu Liang, Yongliang Zhang, Jie Liu, Yu Bai, Dangyuan Lei   +6 more
wiley   +1 more source

Finite frequency current noise in the Holstein model

, 2017
We investigate the effects of local vibrational excitations in the nonsymmetrized current noise $S(\omega)$ of a nanojunction. For this purpose, we analyze a simple model - the Holstein model - in which the junction is described by a single electronic ...
Belzig, Wolfgang, Rastelli, Gianluca, Stadler, Pascal   +2 more
core   +1 more source

Laser‐Welded Cellulose‐Carbon Nanotube Nanocomposites as a 3D Scaffold of Si Anodes for High‐Performance Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
A Si anode comprising entangled networks of cellulose and SWCNT (C‐CNT) nanocomposites as an anode electrode for a high‐performance LIB is realized by fully utilizing the generated microstructure of a novel conductive 3D scaffold via a low‐temperature and eco‐friendly process. Additionally, localized heating via photo‐thermal conversion can be utilized
Boeun Ryu, Younghoon Jung, Hojin Son, Min‐Young Kim, Jinsub Lim, Changhun Yun   +5 more
wiley   +1 more source

Experimental study of friction-induced noise generated from the printer fuser assembly (Generation mechanism and countermeasures)

Mechanical Engineering Journal
In a printer fuser assembly, unpleasant noise caused by friction-induced vibrations can occur owing to friction between the pad and the inner surface of the fixing sleeve.
Yutaka NAKANO, Katsunori CHO, Takamasa HASE, Yuki MATSUMURA, Hiroki TAKAHARA   +4 more
doaj   +1 more source

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

Hopf Bifurcation and Vibration Control for a Thrust Magnetic Bearing with Variable Load Mass

Sensors, 2018
In the working process, the load mass of the thrust magnetic bearing has a significant change. If the load mass changes greatly, the original fixed control parameters cannot ensure that the system is in the optimal stable suspension state, and the ...
Lingling Zhang
doaj   +1 more source

Dynamic Characteristics and Stability Analysis of Space Shuttle Main Engine Oxygen Pump [PDF]

, 1991
The dynamic characteristics of the Space Shuttle high pressure oxygen pump are presented. Experimental data is presented to show the vibration spectrum and response under actual engine operation and also in spin pit testing for balancing. The oxygen pump
Branagan, Lyle, Gunter, Edgar J.
core   +1 more source

Vibration control strategies for proof-mass actuators [PDF]

, 2007
Proof-mass actuators have been considered for a broad range of structural vibration control problems, from seismic protection for tall buildings to the improvement of metal machining productivity by stabilizing the self-excited vibrations known as ...
Huyanan, S., Sims, N.D.
core   +1 more source

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

Advanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source