Spartan Daily, January 12, 1972

Volume 59, Issue 57https://scholarworks.sjsu.edu/spartandaily/5571/thumbnail.jp

Advances in Laser Materials Processing

Laser processing has become more relevant today due to its fast adaptation to the most critical technological tasks, its ability to provide processing in the most rarefied and aggressive mediums (vacuum conditions), its wide field of potential applications, and the green aspects related to the absence of industrial cutting chips and dust. With the development of 3D production, laser processing has received renewed interest associated with its ability to achieve pointed to high-precision powder melting or sintering. New technologies and equipment, which improve and modify optical laser parameters, contribute to better absorption of laser energy by metals or powder surfaces and allow for multiplying laser power that can positively influence the industrial spread of the laser in mass production and advance the existing manufacturing methods. The latest achievements in laser processing have become a relevant topic in the most authoritative scientific journals and conferences in the last half-century. Advances in laser processing have received multiple awards in the most prestigious competitions and exhibitions worldwide and at international scientific events. The Special Issue is devoted to the most recent achievements in the laser processing of various materials, such as cast irons, tool steels, high entropy alloys, hard-to-remelt materials, cement mortars, and post-processing and innovative manufacturing based on a laser

Understanding the Structure of 3D Shapes

Compact representations of three dimensional objects are very often used in computer graphics to create effective ways to analyse, manipulate and transmit 3D models. Their ability to abstract from the concrete shapes and expose their structure is important in a number of applications, spanning from computer animation, to medicine, to physical simulations. This thesis will investigate new methods for the generation of compact shape representations. In the first part, the problem of computing optimal PolyCube base complexes will be considered. PolyCubes are orthogonal polyhedra used in computer graphics to map both surfaces and volumes. Their ability to resemble the original models and at the same time expose a very simple and regular structure is important in a number of applications, such as texture mapping, spline fitting and hex-meshing. The second part will focus on medial descriptors. In particular, two new algorithms for the generation of curve-skeletons will be presented. These methods are completely based on the visual appearance of the input, therefore they are independent from the type, number and quality of the primitives used to describe a shape, determining, thus, an advancement to the state of the art in the field

Understanding the Structure of 3D Shapes

Compact representations of three dimensional objects are very often used in computer graphics to create effective ways to analyse, manipulate and transmit 3D models. Their ability to abstract from the concrete shapes and expose their structure is important in a number of applications, spanning from computer animation, to medicine, to physical simulations. This thesis will investigate new methods for the generation of compact shape representations. In the first part, the problem of computing optimal PolyCube base complexes will be considered. PolyCubes are orthogonal polyhedra used in computer graphics to map both surfaces and volumes. Their ability to resemble the original models and at the same time expose a very simple and regular structure is important in a number of applications, such as texture mapping, spline fitting and hex-meshing. The second part will focus on medial descriptors. In particular, two new algorithms for the generation of curve-skeletons will be presented. These methods are completely based on the visual appearance of the input, therefore they are independent from the type, number and quality of the primitives used to describe a shape, determining, thus, an advancement to the state of the art in the field

Special Issue of the Manufacturing Engineering Society (MES)

This book derives from the Special Issue of the Manufacturing Engineering Society (MES) that was launched as a Special Issue of the journal Materials. The 48 contributions, published in this book, explore the evolution of traditional manufacturing models toward the new requirements of the Manufacturing Industry 4.0 and present cutting-edge advances in the field of Manufacturing Engineering focusing on additive manufacturing and 3D printing, advances and innovations in manufacturing processes, sustainable and green manufacturing, manufacturing systems (machines, equipment and tooling), metrology and quality in manufacturing, Industry 4.0, product lifecycle management (PLM) technologies, and production planning and risks

Европейский и национальный контексты в научных исследованиях

В настоящем электронном сборнике «Европейский и национальный контексты в научных исследованиях. Технология» представлены работы молодых ученых по геодезии и картографии, химической технологии и машиностроению, информационным технологиям, строительству и радиотехнике. Предназначены для работников образования, науки и производства. Будут полезны студентам, магистрантам и аспирантам университетов.=In this Electronic collected materials “National and European dimension in research. Technology” works in the fields of geodesy, chemical technology, mechanical engineering, information technology, civil engineering, and radio-engineering are presented. It is intended for trainers, researchers and professionals. It can be useful for university graduate and post-graduate students

The manufacture of Minoan metal vessels: theory and practice

This study aims to establish the equipment and methods used to make hammered metal vessels in Crete during the Bronze Age. It combines archaeological research with metalsmithing practice. The most substantial studies to date have been largely typological. Some have examined the equipment and processes used, but usually without fully taking into account the metalsmithing techniques involved in vessel manufacture. An understanding of the equipment required and the manner in which it is used provides a new perspective on the Minoan craft and its practitioners. The initial stages of the study involved investigating Minoan vessel types and characteristics, and studying excavation reports on Bronze Age metallurgical sites in Crete as well as publications on the metallurgy of Minoan Crete and other Bronze Age cultures. The second stage was the detailed examination of a number of Minoan vessels in collections in Crete and the UK. The final stage was to replicate tools and equipment found at Minoan metallurgical sites and to test their viability for making Minoan metal-vessel forms. The processes involved annealing, the application of different hammering methods, riveting and polishing techniques. These reconstructed processes led to the creation of two small bowls, a hydria made from separate sections and a one-handled basin. The results of this research and the replication of equipment and techniques made it possible to reconstruct the processes used to make these vessels. Several other discoveries were made which have broader implications. Firstly, the reconstructive process revealed some of the physical aspects of the craft which would have affected the working practices of Minoan smiths and the roles of individuals within a workshop. Secondly, the study showed that simple tools found at many Minoan metallurgical sites are very effective for creating these vessels. Furthermore, the results suggest that metalsmithing may have occurred at more locations than are currently recognised as metallurgical sites. Lastly, it was discovered that both the forms and the often large sizes of Minoan vessels and, by extension, many Mycenaean vessels were determined by the types of tools that the smiths used. This has implications for how we might interpret these vessels within the broader context of the metal-vessel traditions of other contemporary cultures. -- provided by Candidate.v. 1. Text -- v. 2. Figure

NASA Tech Briefs, November 1990

Topics: New Product Ideas; NASA TU Services; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences