We apply a single Boltzmann-like integro-diierential equation to model pattern formation in aspect space. Dynamics of density distributions are considered in two cases. First, the distribution of organisms on the real line is investigated. A linear stability analysis reveals conditions on interactions between the organisms that lead to aggregation and periodic patterns. Use of diiusion approxim...

Studies of ventricular depolarization with multichannel recording technics permit detailed three dimensional analysis of the process. Activity commences on the mid left septal surface, followed by activity on the right septum. Rapid endocardial excitation follows and leads to endoepicardial activation of the walls. The latest areas activated are in the basal septum. These findings are related t...

Non-puerperal uterine inversion is an extremely rare gynaecological event that is usually associated with uterine tumours such as submucous or cervical leiomyomas. In this report, we describe a case of uterine inversion due to a large submucous leiomyoma in a 42-year-old multiparous and obese Caucasian woman.

ADIFFERENCE has been observed in certain instances between the onset of QRS in intracavitary and surface limb leads. Simultaneous tracings demonstrate that when premature ventricular depolarization exists the early rapid growth in magnitude of potential recorded by intracavitary leads may be nearly or totally inapparent in surface leads. Following premature depolarization changes occur in intra...

Adjusting input-output gain is crucial for information processing by the brain. Gain control of subthreshold depolarization is commonly ascribed to increased membrane conductance caused by shunting inhibition. But contrary to its divisive effect on depolarization, shunting inhibition on its own fails to divisively modulate firing rate, apparently upsetting a critical tenet of neural models that...

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This pilot study examined changes in parenting skills and child behavior following participation in an online positive parenting skills program designed for young children with traumatic brain injury (TBI). Thirty-seven families with a child between 3 and 9 years of age who sustained a moderate to severe TBI were randomly assigned to one of two interventions: online parenting skills training (n...

Abundances in terrestrial and meteoritic matter indicate that the synthesis of Dz, Lie, Li7, Beg, BlO and B11 and possibly C13 and N15 occurred during an intermediate stage in the early history of the solar system. In this intermediate stage, the planetary material had become largely separated, but not completely, from the hydrogen which was the main constituent of primitive solar material. App...

Understanding the relationship between structure and function in the heart requires a knowledge of the connection between the local behavior of the myocardium (e.g., shortening) and the pumping action of the left ventricle. We asked the question, how do changes in preload and afterload affect the relationship between local myocardial deformation and ventricular volume? To study this, a set of s...

An increasing body of literature confirms anecdotal reports that cognitive changes occur during pregnancy. This article assessed whether prior pregnancy, which alters a woman's subsequent hormonal environment, is associated with a specific cognitive profile during and after pregnancy. Seven primigravids and nine multigravids were compared, equivalent for age and education. No differences betwee...