this investigation was performed according to the widespread application of base metal alloys and few articles published about the marginal integrity of restorations fabricated by these metals.three standard dies of a maxillary first premolar were prepared with a flat shoulder finish line in buccal aspect and chamfer in palatal. one of them left with no change. on the buccal aspect of the secon...

Cadmium were found in the die casting factory as by product of zinc alloy that used in the manufacturing of die cast. Metallothionein (MT) a carrier protein plays an important role in the detoxification process of cadmium in human. The usefulness of MT gene expression in peripheral blood lymphocytes (PBLs) as a biomarker of cadmium exposure and susceptibility could be determine by reverse trans...

In current casting factories, tilting type automatic pouring machines are often used to pour the molten metal into the mold, with the operator relying on experience, perception and repeated testing to manually determine the pouring velocity. However, seeking an optimum multistep pouring velocity through trial and error results in an enormous number of combinations and is very difficult. For thi...

In the paper distributed parameter system models in the form of lumpedinput/distributed-output systems are introduced and modeling of temperature fields of the die in the benchmark casting plant is presented. Temperature fields were modeled and studied using a finite element method based software package COMSOL Multiphysics and numerical models in the form of a lumped-input/ distributed-output ...

The merit of the project consists in the interdisciplinary joining of the knowledge in the area of light metal alloys, including Al and/or Mg, in the area of materials processing connected with the entire scope of problems connected with manufacturing of products and their elements, in the area of the automated low-pressure die casting, and also in the methodology of structure and properties as...

The dimensionless Niyama criterion was used to predict the formation of microporosity in nickel-based superalloy casting, which extended the model application from a simple plate casting to complex thin-wall superalloy casting. The physical characteristics of the superalloy were calculated by JMatPro software. The relation between the volume percentage of microporosity and the dimensionless Niy...

Kurzfassung. In diesem Artikel wird ein neuer Algorithmus zur Segmentierung pleuraständiger Lungenrundherde in CT-Aufnahmen vorgestellt. Lungenrundherde mit großflächigem Kontakt zur Brustwand oder anderen gleichdichten Strukturen sind eine besondere Herausforderung für Segmentierungsverfahren. Wir verwenden einen Ray-Casting-Ansatz, um Punkte am sichtbaren Rand der Läsion zu finden, und berech...