A simple method is proposed for determining the masses of new particles in collider events containing a pair of decay chains (not necessarily identical) of the form Z → Y + 1, Y → X + 2, X → N + 3, where 1,2 and 3 are visible but N is not. Initial study of a possible supersymmetric case suggests that the method can determine the four unknown masses in effectively identical chains with good accu...

Analyses of Ps and Sp receiver functions from datasets collected by permanent and temporary seismic stations, image a seismic discontinuity, due to a negative velocity contrast across the entire Eastern Alps. The receiver functions show the presence of the discontinuity within the upper mantle with a resolution of tens of kilometers laterally. It is deeper (100-130 km) below the central portion...

Observations suggest that g-ray bursts (GRBs) are produced by the dissipation of the kinetic energy of a relativistic fireball. We show that a large fraction, $10%, of the fireball energy is expected to be converted by photomeson production to a burst of ,1014 eV neutrinos. A km2 neutrino detector would observe at least several tens of events per year correlated with GRBs, and test for neutrino...

The human brain processes different kinds of information (or cues) independently with different neural latencies. How does the brain deal with these differences in neural latency when it combines cues into one estimate? To find out, we introduced artificial asynchronies between the moments that monocular and binocular cues indicated that the slant of a surface had suddenly changed. Subjects had...

We report on a high-power subpicosecond monolithic self-mode-locked Yb:KGW laser with the pulse repetition rate up to several tens of gigahertz. Experimental results reveal that not only the repetition rate but also the pulse width depend on the length of the laser crystal. Using a coated Yb:KGW crystal with a length of 3.36 mm, mode-locked pulses with pulse duration of 850 fs at the repetition...

The structure of the Canadian healthcare system, particularly in Ontario, has remained remarkably stable over the past 25 years. No other private sector industry employing hundreds of thousands of people, spending tens of billions of dollars annually and serving millions of consumers every day has survived for 30 years without the need to reinvent itself in quite fundamental ways. How then has ...

Optoelectronic tweezers is a new technique to trap and manipulate particles with sizes ranging from tens of nanometers to hundreds of micrometers. Using optically-controlled dielectrophoretic force on a photoconductive electrode, optoelectronic tweezers enables complex, dynamic manipulation functions using light intensities up to 100,000 times lower than that of conventional laser tweezers. © 2...

The brain is noisy. Neurons receive tens of thousands of highly fluctuating inputs and generate spike trains that appear highly irregular. Much of this activity is spontaneous - uncoupled to overt stimuli or motor outputs - leading to questions about the functional impact of this noise. Although noise is most often thought of as disrupting patterned activity and interfering with the encoding of...

Trains of ultrashort laser pulses separated by the time of rotational revival (typically, tens of picoseconds) have been exploited for creating ensembles of aligned molecules. In this work we introduce a chiral pulse train--a sequence of linearly polarized pulses with the polarization direction rotating from pulse to pulse by a controllable angle. The chirality of such a train, expressed throug...

nerve stimulation on two occasions, double blind and in random order, with a single intravenous dose of saline or with a single intravenous dose of50 mg naloxone. Treatment with transcutaneous electrical nerve stimulation increased tolerance to pacing and significantly improved lactate metabolism with placebo and with naloxone. The positive effects oftranscutaneous electrical nerve stimulation ...