Walter Heywang – författare
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5 produkter
5 produkter
551 kr
Skickas inom 10-15 vardagar
551 kr
Skickas inom 10-15 vardagar
Aus den Besprechungen: "Die Qualität dieses Werkes läßt es ... notwendig erscheinen, einiges mehr zu ihm zu sagen. Seine Stärke besteht nämlich darin, daß die Grundlagen immer von unterschiedlichen Gesichtspunkten aus behandelt werden. So wird das Bändermodell von den Eigenfunktionen wechselwirkender Atome, aus der Schrödinger-Gleichung und über die Pseudopotentialmethode anschaulich eingeführt. Bedeutsam ist, daß dies auf unterschiedlichem Niveau erfolgt. Dadurch werden die gegenseitige Bedingtheit und die Besonderheiten der Methoden noch deutlicher. Insgesamt werden auf diese Weise vier Kapitel behandelt: Bändermodell, gestörtes Gitter, Rekombination von Ladungsträger und Stromtransport. Ein umfangreiches Literaturverzeichnis und ein gutes Sachwortverzeichnis ergänzen das Werk. Allen denen, die tiefer in diese Problematik eindringen wollen, kann es nur empfohlen werden." #Elektronische Informationstechnik und Kybernetik#
799 kr
Skickas inom 10-15 vardagar
2 126 kr
Skickas inom 10-15 vardagar
Discovered in 1880, piezoelectric materials play a key role in an innovative market of several billions of dollars. Recent advances in applications derive from new materials and their development, as well as to new market requirements. With the exception of quartz, ferroelectric materials are used for they offer both high efficiency and sufficient versatility to meet adequately the multidimensional requirements for application. Consequently, strong emphasis is placed on tailoring materials and technology, whether one deals with single crystals, ceramics or plastic materials. Tailoring requires a basic understanding of both physical principles and technical possibilities and limitations. This report elucidates these developments by a broad spectrum of examples, comprising ultrasound in medicine and defence industry, frequency control, signal processing by SAW-devices, sensors, actuators, including novel valves for modern motor management. It delivers a mutual fertilization of technology push and market pull that should be of interest not only to materials scientists or engineers but also to managers who dedicate themselves to a sound future-oriented R&D policy.
2 126 kr
Skickas inom 10-15 vardagar
Discovered in 1880, piezoelectric materials play a key role in an innovative market of several billions of dollars. Recent advances in applications derive from new materials and their development, as well as to new market requirements. With the exception of quartz, ferroelectric materials are used for they offer both high efficiency and sufficient versatility to meet adequately the multidimensional requirements for application. Consequently, strong emphasis is placed on tailoring materials and technology, whether one deals with single crystals, ceramics or plastic materials. Tailoring requires a basic understanding of both physical principles and technical possibilities and limitations. This report elucidates these developments by a broad spectrum of examples, comprising ultrasound in medicine and defence industry, frequency control, signal processing by SAW-devices, sensors, actuators, including novel valves for modern motor management. It delivers a mutual fertilization of technology push and market pull that should be of interest not only to materials scientists or engineers but also to managers who dedicate themselves to a sound future-oriented R&D policy.