Discrete-time quadrature feedback cooling of a radio-frequency mechanical resonator
, 2011 We have employed a feedback cooling scheme, which combines high-frequency mixing with digital signal processing. The frequency and damping rate of a 2 MHz micromechanical resonator embedded in a dc SQUID are adjusted with the feedback, and active cooling
H. S. J. van der Zant +4 more
core +1 more source
Klein-Nishina Effects on Optically Thin Synchrotron and Synchrotron Self-Compton Spectrum [PDF]
, 2009 We present analytic approximations to the optically thin synchrotron and synchrotron self-Compton (SSC) spectra when Klein-Nishina (KN) effects are important and pair production and external radiation fields can be neglected.
Ando +25 more
core +2 more sources
Active electron cooling of graphene
Advanced Functional MaterialsAbstract In the emergent field of quantum technology, the ability to manage heat at the nanoscale and in cryogenic conditions is crucial for enhancing device performance in terms of noise, coherence, and sensitivity. Here, we demonstrate the active cooling and refrigeration of the electron gas in graphene, by taking advantage of nanoscale ...
Federico Paolucci +3 more
openaire +2 more sources
Structural insights into an engineered feruloyl esterase with improved MHET degrading properties
FEBS Letters, EarlyView.A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa +5 more
wiley +1 more source
Diagnosing the time-dependence of active region core heating from the emission measure: II. Nanoflare trains [PDF]
, 2013 The time-dependence of heating in solar active regions can be studied by analyzing the slope of the emission measure distribution cool-ward of the peak.
Bradshaw, Stephen J. +2 more
core +2 more sources
Nonequilibrium Steady-State Fluctuations in Actively Cooled Resonators [PDF]
Physical Review Letters, 2009 to be published in Phys.
M. Bonaldi +17 more
openaire +7 more sources
FEBS Letters, EarlyView.This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel +13 more
wiley +1 more source
Fast‐Response Variable‐Stiffness Magnetic Catheters for Minimally Invasive Surgery
Advanced ScienceIn minimally invasive surgery, such as cardiac ablation, magnetically steered catheters made of variable‐stiffness materials can enable higher dexterity and higher force application to human tissue.
Yegor Piskarev +8 more
doaj +1 more source
Numerical Study on Cooling Effect of Downhole Cooling System of Instrument While Drilling
Shiyou jixie, 2022 Deep and ultra-deep reservoirs have been listed as important replacement areas for oil and gas resources. However, downhole high temperature in deep layers shortens the service life of the instrument while drilling, and even makes it fail.
Liu Ke +3 more
doaj
Technical solutions to prevent heat stress induced crop growth reduction for three climatic regions in Mexico [PDF]
, 2008 In the last 15 years a significant increase in greenhouse area has occurred in Mexico, from a modest 50 hectares in 1990 to over 2,000 hectares in 2004. The rapid increase in greenhouse area is a result of an attractive export market, USA. Mexican summer
Henten, E.J., van +3 more
core +2 more sources