This book is the second volume in the Handbook of Surface Science series and deals with aspects of the electronic structure of surfaces as investigated by means of the experimental and theoretical methods of physics. The importance of understanding surface phenomena stems from the fact that for many physical and chemical phenomena, the surface plays a key role: in electronic, magnetic, and optical devices, in heterogenous catalysis, in epitaxial growth, and the application of protective coatings, for example. Therefore a better understanding and, ultimately, a predictive description of surface and interface properties is vital for the progress of modern technology. An investigation of surface electronic structure is also central to our understanding of all aspects of surfaces from a fundamental point of view. The chapters presented here review the goals achieved in the field and map out the challenges ahead, both in experiment and theory.

Bucher uber Rechnerorganisation, Rechnerstrukturen oder Rechnerarchitektur be- handeln ublicherweise die Hardware und die Software digitaler Rechner als getrenn- te Gebiete. Wenig oder gar nicht findet die Tatsache Berucksichtigung, daB die Funk- tion von Digitalrechnern erst durch das Zusammenwirken von Hardware und Software zustandekommt und daB beim Entwurf eines Rechners fur jede Funktionseinheit zwi- schen den M6glichkeiten der Hardware- oder der Software-Realisierung gewahlt wer- den kann. Das vorliegende Buch solI hier eine Lucke schlieBen, indem diese gegen- uberstellende Betrachtungsweise konsequent durchgefiihrt und durch viele Beispiele untermauert wird. Bei der Auswahl des Stoffes wurde der Schwerpunkt auf Organisationsformen von Re- chenanlagen gelegt, die sich in der Praxis bewahrt haben. 1m Vordergrund stehtnlcht die Darstellung einer Vielzahl technisch verschiedener Ausfiihrungen, sondern die Behandlung von Prinzipien der Wirkungsweise und des Entwurfs von Digitalrechnern. Das Buch ist somit fur Studenten, Programmierer und Ingenieure zum Erlernen von Techniken des Rechnerentwurfs und der Assemblerprogrammierung bestimmt, eben- so wie fur Rechnerbenutzer als Erganzung zu Rechner- und Assembler-Handbuchern der Hersteller. Auf Angaben konkreter Werte von Leistungsmerkmalen heutiger Rech- ner wurde wegen des enormen Tempos der technischen Entwicklung weitgehend ver- zichtet. Diese insbesondere fur Systemplaner wichtigen Fragen der Bewertung von Rechenanlagen aufgrund betrieblicher Erfordernisse und technologischer M6glichkei- ten sind Stoff des 1975 im gleichen Verlag erschienenen Buches "Architektur digitaler Rechner" von E. Jessen.

Lexie's high school experience starts out so well. Her landing a seat in the Columbus Jr. Symphony rewards her musical skills. Her classes introduce her to really nice kids. But there isn't enough time in the day to practice, become active with her friends in theater, and achieve good grades. And then there is her mother's reluctance to accept her new friends, and her need for support to adjust to her new culture, surroundings and pressures. Her parents, Anne and Kenneth Hamilton have their own issues. Anne has almost lost one of her younger daughters to a swimming pool accident. When Kenneth has an opportunity to take a professor position at The Ohio State University in Columbus, Ohio, she cannot wait to leave the small town in Georgia where she had raised her two older children to avoid the feeling that she could still lose one of her little girls. Kenneth has recently injured his back. Still trying to heal from the injury and deal with the stress of a new position, he becomes dependent on Percocet and Xanax. Lexie tries to make her way on her own in the social maze of teenage culture in a suburban high school. When she catches the eye and the heart of a senior boy but then breaks up with him, her friends spread the rumor she is gay. Her sophomore year and junior year bring further challenges. She reaches into her parents' medicine cabinet to feel normal. She accidentally ODs. Her mother thinks Lexie needs further discipline and restrictions. Lexie denies she needs help. She loses patience waiting to gain her mother's trust. More than a Young Adult novel, The Rabbit Trap will give parents and teens quite a few topics to discuss.