Let {v; b2, b1} denote the class of extended directed triple systems of the order v in which the number of blocks of the form [a, b, a] is b2 and the number of blocks of the form [b, a, a] or [a, a, b] is b1. In this paper, the classes {v; b2, 0} and {v; 0, b1} have been constructed.

Segmental mechanics consists of multiple wire cross-sections in different segments of the arch. The advantages of segmental mechanics in comparison with continuous mechanics are a statically determinate force system, relatively constant force, minimal side-effects on the anchorage unit, minimal arch wire fabrication, decreased treatment duration and enhanced esthetics. Individual retraction of ...

BACKGROUND Segmental hyperhidrosis is an uncommon finding which is usually associated with irritation or infiltration of pre-ganglionic sympathetic fibres or the sympathetic chain. METHODS We report two cases of segmental hyperhidrosis with striking clinical features. RESULTS In one case, a mesothelioma produced ipsilateral simultaneous underactivity and overactivity of sympathetic outflow ...

In stenosis of a segmental branch or among multiple renal arteries, Doppler sampling of intrarenal arteries in the upper, mid and lower poles demonstrates strikingly different waveform patterns that might otherwise be overlooked. We report a case of segmental branch renal artery stenosis in which a pulsus parvus et tardus waveform was observed in a segmental branch of a renal artery. In this ca...

A sentence-final particle (SFP, henceforth) is an optional component for a sentence in Cantonese. Traditionally an SFP contains at least one independent segment. The present study proposes that for sentences without a segmental SFP, sentencefinal intonation can act as a segmentless SFP. Systematical acoustic experiment was conducted based on this assumption. Two cross-cutting dichotomies were c...

Torsion and infarction of the greater omentum are two rare clinical situations which present as an acute abdomen. Nevertheless, knowledge concerning these two problems can help the surgeon in proper diagnosis and treatment. Since the first report on primary torsion by Eitel in 1899, a few hundred more have been reported and some collective reviews published to date. In this study we will p...

PHACE syndrome refers to the association of large segmental facial hemangiomas with 1 or more of the following anomalies: posterior fossa malformations, arterial anomalies, cardiac anomalies, and eye abnormalities. In this review, we present a newborn with a large segmental facial hemangioma and abnormal genesis of the cerebropetal arteries. Furthermore, we give an overview of the anomalies ass...

The segmental plate mesoderm of snapping turtle embryos (Chelydra serpentina) was examined with stereoscanning electron microscopy imaging. A metameric pattern was detected along the entire length of the segmental plates. This pattern consisted of a tandem sequence of mesodermal units, called somitomeres. Each somitomere was oval to cubic in shape and the processes of the constituent mesodermal...

We identified 255 loci across the human genome that contain genomic imbalances among unrelated individuals. Twenty-four variants are present in 410% of the individuals that we examined. Half of these regions overlap with genes, and many coincide with segmental duplications or gaps in the human genome assembly. This previously unappreciated heterogeneity may underlie certain human phenotypic var...

Tandem and segmental duplications significantly contribute to gene family expansion and genome evolution. Genome-wide identification of tandem and segmental genes has been analyzed before in several plant genomes. However, comparative studies in functional bias, expression divergence and their roles in species domestication are still lacking. We have carried out a genome-wide identification and...