Tanytrachelos ahynis (n.gen., n. sp.) is a lepidosaur from the Late Triassic Dan River Group (Newark Supergroup) of North Carolina and Virginia. The new reptile has gracile proportions similar to Tanystropheus (Middle Triassic) and is referred to the family Tanystropheidae of the suborder Prolacertiformes. Unlike Tanystropheus, Tanytrachelos has relatively short cervical vertebrae bearing splin...

Tanytrachelos ahynis (n.gen., n. sp.) is a lepidosaur from the Late Triassic Dan River Group (Newark Supergroup) of North Carolina and Virginia. The new reptile has gracile proportions similar to Tanystropheus (Middle Triassic) and is referred to the family Tanystropheidae of the suborder Prolacertiformes. Unlike Tanystropheus, Tanytrachelos has relatively short cervical vertebrae bearing splin...

In this paper, we propose a model of schema versions for object-oriented databases called RIBS. At the heart of this model is the concept of the rich base schema called (RiBS). In our model, each schema version is in the form of a class hierarchy view over one base schema, called RIBS, which has richer schema information than any existing schema version in the database. Users are supposed to be...

Ribs in aircraft wings maintain the airfoil shape of wing under aerodynamic loads and also support resulting bending shear that act on wing. Aircrafts are designed for least weight hence made hollow torsion box ribs with cut-outs to reduce structure. These will lead higher stresses stress concentration can failure structures. The depend thus present work, commercial software ANSYS was used eval...

Metastatic tumors in ribs are fairly common and if the primary neoplasm is recognized the diagnosis of metastasis is usually not difficult and can be confirmed by aspiration biopsy. Primary tumors in ribs, on the other hand, are much less common and frequently no definite diagnosis can be made until the neoplasm is resected and submitted to a competent pathologist. In reviewing the available li...

A combined numerical and experimental study is conducted to test the heat transfer enhancement friction factor characteristics for a rectangular duct fitted with three cases of ribs turbulators: continuous ribs, intermittent-continuous-intermittent intermittent ribs. Experiments are within turbulent flow Reynolds numbers values varied from 10000 35000, pitch ratio equal 5 height 0.33. The carri...

A good understanding of thoracic biomechanics is important for complete examination and control of chest behaviour under conditions of physiological and pathological work, and under the impact of external forces leading to traumatic loading of the chest. The purpose of the study was to analyse the mechanical properties of human ribs obtained from individuals under the age of 25 with scoliosis d...

Costal movement was defined on living subjects by determining the spatial vectors along the ribs that are produced during inspiration. The determination of these vectors was achieved with an instrument specially designed for this purpose. Rib movement was studied on 61 ribs in 10 normal subjects and on 35 ribs in six patients suffering from kyphoscoliosis and ankylosing spondylitis. In normal s...

A cervical rib generally arises from the seventh cervical vertebra and is known as an anomalous accessory rib or “Eve’s rib” [1]. A recent literature survey reported that cervical ribs are present in less than 1% of the normal population and are asymptomatic in about 90% of cases [2]. Complete cervical ribs are fused with the tubercle on the upper aspect of the first thoracic rib, very close to...