Although circadian oscillation in dynamics of intracellular Ca2+ signals has been observed in both plant and animal cells, it has remained unknown whether Ca2+ signals play an in vivo role in cellular oscillation itself. To address this question, we modified the dynamics of intracellular Ca2+ signals in circadian pacemaker neurons in vivo by targeted expression of varying doses of a Ca2+ buffer...

The Boltzmann equation provides a rigorous theoretical framework to study dilute gas flows at arbitrary degrees of rarefaction. Asymptotic methods have been applied to steady flows, enabling the development of analytical formulae. For unsteady (oscillatory) flows, two important limits have been studied: (i) at low oscillation frequency and small mean free path, slip models have been derived; an...

Day-scale Earth's free oscillation after large earthquakes has been detected by underground instruments such as strainmeters, gravimeters and seismometers, to investigate Earth's internal structure, geodynamics, and source properties of earthquakes. Here we show that Global Positioning System (GPS) can also detect the signals of the Earth's free oscillation. A dense GPS array in Japan (GEONET) ...

The transition to turbulence in boundary flow of superfluid 4He is investigated using a vibrating wire. An object in a superfluid is usually accompanied by remanent vortices, enabling to cause turbulence by its oscillation even at very low temperature. However, remanent vortices make it difficult to investigate the transition to turbulence. Recently, we have successfully devised a condition of ...

Platelets play an important role in the haemostatic process in order to seal damaged blood vessels. The platelets form a platelet plug at the damaged area and prevent blood loss. Once the damage to the vessel wall has been covered, the platelets retract the coagulum, to allow the blood to flow freely in the vessel. Free oscillation rheometry (FOR) can be used for analysis of coagulation as meas...

A refined a posteriori error analysis for symmetric eigenvalue problems and the convergence of the first-order adaptive finite element method (AFEM) is presented. The H stability of the L projection provides reliability and efficiency of the edge-contribution of standard residual-based error estimators for P1 finite element methods. In fact, the volume contributions and even oscillations can be...

The earthquake in December 2004 caused free oscillations of the Earth. Vibrates the earth in the “football mode“ 0S2, splits the natural frequency due to rotation into five closely adjacent individual components. The sum of these spectral components in the frequency band near 309 μHz produces a beat that gives the overall amplitude envelope a characteristic, regular pattern. From the measured e...

We study the oscillation frequencies and radiative decay rates of surface plasmon modes of a simple-metal sphere as a function of sphere radius without any assumptions concerning the sphere size. We re-examine within the framework of classical electrodynamics the usual expectations for multipolar plasmon frequency in the so called ”low radius limit” of the classical picture.

Oscillations in a power system can be categorized into free oscillations and forced oscillations. Many algorithms have been developed to estimate the modes of free oscillations in a power system. Recently, forced oscillations caught many attentions. Techniques are proposed to detect forced oscillations and locate their sources. In addition, forced oscillations may have negative impact on the es...

Electrical silencing of Drosophila circadian pacemaker neurons through targeted expression of K+ channels causes severe deficits in free-running circadian locomotor rhythmicity in complete darkness. Pacemaker electrical silencing also stops the free-running oscillation of PERIOD (PER) and TIMELESS (TIM) proteins that constitutes the core of the cell-autonomous molecular clock. In contrast, elec...