GORDON, ALLEN R., AND MARION J. SIEGMAN. Mechanical properties of smooth muscle. I. Length-tension and force-velocity relations. Am. J. Physiol. 221 (5) : 1243-1249. 1971 .-The length-tension and force-velocity relationships of rabbit taenia coli were studied at 22 C. The absence of spontaneous mechanical activity at this temperature was confirmed by test applications of epinephrine. The muscle...

To determine if paced cycle length-dependent changes in the QRS duration correlate with the change in ventricular tachycardia (VT) cycle length after procainamide, we measured the QRS duration during sinus rhythm and during right ventricular pacing before and after procainamide (mean concentration, 9.9 micrograms/ml) in 18 patients with morphologically identical VT induced at both study periods...

1. The mesothoracic wings of tettigoniid insects are used in song production and flight; the metathoracic wings in flight only. In Neoconocephalus triops the wing stroke frequency during flight is about 25 Hz; the frequency during singing about 100 Hz. 2. The twitch duration of mesothoracic, first tergocoxal (Tcxl) wing muscles is only about one-half the duration of the upstroke or downstroke p...

We consider the random Schrödinger equation as it arises in the paraxial regime for wave propagation in random media. In the white noise limit it becomes the Itô-Schrödinger stochastic partial differential equation (SPDE) which we analyze here in the high frequency regime. We also consider the large lateral diversity limit where the typical width of the propagating beam is large compared to the...

In this study, we apply a mean-field theory to the neural network model with two periodic inputs in order to clarify the conditions of synchronies. This mean-field theory yields a self-consistent condition for the synchrony and enables us to study the effects of synaptic connections for the behavior of neural networks. Then, we obtain a condition of synaptic connections for the synchrony with t...

Mechanical machining processes are common manufacturing strategies to re-shape materials to desired specification. The mechanistic approach has revealed the mechanics of the machining processes with various parameters determined. The aim of this work is to investigate the impact of swept angle optimization and their influence on the specific cutting energy in milling AISI 1045 steel alloy. This...

Infrared ports are employed in a wide variety of devices ranging from personal computers and printers to mobile phones. Infrared connectivity complies to specifications defined by Infrared Data Association (IrDA). The performance of IrDA links may be measured at the IrLAP data link layer, which controls the IrDA hardware. A simple equation to calculate throughput from different link parameters ...

this study was conducted to evaluate the current management of furrow and border irrigation systems in the dez irrigation network. of the eight farms studied, three grew wheat and one each grew corn, sugar beets, lettuce, sesame and mung beans. the study found water application efficiency in the five farms with furrow irrigation systems to be 25.8% and for the three farms with border irrigation...

We study the sequences generated by neuronal recurrence equations of the form x(n) = 1[ ∑h j=1 ajx(n − j) − θ]. From a neuronal recurrence equation of memory size h which describes a cycle of length ρ(m)× lcm(p0, p1, . . . , p−1+ρ(m)), we construct a set of ρ(m) neuronal recurrence equations whose dynamics describe respectively the transient of length O(ρ(m)×lcm(p0, . . . , pd)) and the cycle o...