نتایج جستجو برای: clock centers
تعداد نتایج: 158899 فیلتر نتایج به سال:
There is an ongoing debate on the mechanism underlying the pacemaker activity of sinoatrial node (SAN) cells, focusing on the relative importance of the "membrane clock" and the "Ca(2+) clock" in the generation of the small net membrane current that depolarizes the cell towards the action potential threshold. Specifically, the debate centers around the question whether the membrane clock-driven...
Analysis of GNSS clocks performance is traditionally carried out by network analysis techniques where orbits and all participant clocks are computed in a batch or Kalman Filter least-squares adjustment to a reference time scale and reference frame. Several companies, organizations, and IGS analysis centers produce postprocessing orbits and clock estimations mainly at 15 or 5 minutes respectivel...
The visual system consists of two major subsystems, image-forming circuits that drive conscious vision and non-image-forming circuits for behaviors such as circadian photoentrainment. While historically considered non-overlapping, recent evidence has uncovered crosstalk between these subsystems. Here, we investigated shared developmental mechanisms. We revealed an unprecedented role for light i...
In recent years, many national timing laboratories have installed geodetic Global Positioning System receivers together with their traditional GPS/GLONASS Common View receivers and Two Way Satellite Time and Frequency Transfer equipments. Many of these geodetic receivers operate continuously within the International GNSS Service (IGS), and their data are regularly processed by IGS Analysis Cent...
Saving energy is one of the most important challenges of todaychr('39')s world. Reducing electrical energy consumption in compressed air systems is one of the essential requirements for designing these systems. When using domestic air conditioners (dual air conditioners) in very hot areas (Khuzestan) their performance decreases and electric current consumption increases. Therefore, the use of n...
Shallow nitrogen-vacancy (NV) centers in diamond are promising for nanomagnetometry, they can be placed proximate to targets. To study the intrinsic magnetic properties, zero-field magnetometry is desirable. However, shallow NV under zero field, strain near surfaces would cause level anticrossing between spin states, leading clock transitions whose frequencies insensitive signals. Furthermore, ...
Computing the free energy of binding a ligand to a protein is a difficult task of essential importance for which purpose various theoretical/computational approaches have been pursued. In this paper, we develop a hybrid steered molecular dynamics (hSMD) method capable of resolving one ligand–protein complex within a few wall-clock days with high enough accuracy to compare with the experimental ...
The term " 24-Hour Knowledge Factory " connotes a globally distributed work environment in which members of the global team work on a project around the clock; each member of the team works the normal workday hours that pertain to his or her time zone. At the end of such a workday, a fellow team member located in a different time zone continues the same task. This creates the shift-style workfo...
Atomic-like defects in solids are not considered to be identical owing the imperfections of host lattice. Here, we found that even under ambient conditions, negatively charged nitrogen-vacancy (NV$^-$) centers diamond could still manifest at Hz-precision level, corresponding a 10$^{-7}$-level relative precision, while lattice strain can destroy identity by tens Hz. All parameters involved NV$^-...
Background and purpose: carrying out appropriate interventions to improve the favorable care attitude can have a great effect on improving the quality of life. The present study was conducted in order to determine the effectiveness of educational intervention on the caring attitude of caregivers of mentally disabled children. Methods: The present study was a pre-test and post-test intervention...
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