Both the swimbladder and sonic muscles of the oyster toadfish Opsanus tau (Linnaeus) increase in size with fish growth making it difficult to distinguish their relative contributions to sound production. We examined acoustics of the swimbladder independent of the sonic muscles by striking it with a piezoelectric impact hammer. Amplitude and timing characteristics of bladder sound and displaceme...

We evaluated the influence of the trench-parallel component of plate motion on the active fault system within the Nankai accretionary wedge from reflection seismic profiles, high-resolution seafloor bathymetry, and deep-towed sub-bottom profiles. Our study demonstrated that a large portion of the trench-parallel component of oblique plate subduction is released by strike-slip motion along a fau...

Globally disruptive events include asteroid/comet impacts, large igneous provinces and glaciations, all of which have been considered as contributors to mass extinctions. Understanding the overall relationship between the timings of the largest extinctions and their potential proximal causes remains one of science's great unsolved mysteries. Cycles of about 60 million years in both fossil diver...

[Purpose] The purpose of this study was to clarify the validity of accelerometer data for quantifying fluidity during the sit-to-walk task. [Subjects] The participants were 16 healthy young males. [Methods] The timing of events (task onset, maximum trunk inclination, and first heel strike) was determined from the acceleration waveform and compared to the timing determined from a three-dimension...

We have analysed 721 earthquakes (1.5jmbj5.0) of the 1993–1994 Western Almerı́a (southern Spain) series and the following seismicity in the area until 1998. Among the data there are several multiplets, events characterized by very similar seismograms at the short-period stations of the local network. We detected similar seismograms using crosscorrelation analysis of the P and S arrivals and clas...

Different types of focal mechanism solutions for the 19 March 2021 Mw 5.7 Nakchu earthquake, Tibet, limit our understanding this earthquake’s seismogenic and geodynamic process. In study, coseismic deformation field was determined geometric parameters fault were inverted via Interferometric Synthetic Aperture Radar (InSAR) processing Sentinel-1 data. The inversion results show that earthquake a...

One implication of future information superiority is a new set of concepts for all the military services. The concepts in Joint Vision 2010— dominant maneuver, precision engagement, full-dimensional protection, and focused logistics—are viewed as “transformations” of more traditional functions (maneuver, strike, protection, and logistics) “so powerful that they become, in effect, new concepts.”

Ant-lions are pit-building larvae (Neuroptera: Myrmeleontidae), which possess relatively large mandibles used for catching and consuming prey. Few studies involving terrestrial arthropod larva have investigated prey capture behavior and kinematics and no study has shown modulation of strike kinematics. We examined feeding kinematics of the ant-lion, Myrmeleon crudelis, using high-speed video to...

[1] To investigate the possible physical mechanisms of recently observed aseismic slip events in the Cascadia, Japan and Mexico subduction zones, we apply a Dieterich-Ruina rate and state friction law to a three dimensional model of a shallow subduction fault. That is loaded by imposed steady plate slip rate far downdip along the thrust interface. Friction properties are temperature and hence d...