This book constitutes the proceedings of the 18th Collaboration Researchers' International Working Group Conference on Collaboration and Technology, held in Raesfeld, Germany, in September 2012. The 9 revised papers presented together with 12 short papers were carefully reviewed and selected from numerous submissions. They are grouped into five themes that represent collaborative learning, social media analytics, conceptual and design models, formal modeling and technical approaches and collaboration support in emergency scenarios.

In diesem Buch sind die Ergebnisse eines Seminars zum Thema "Programmierung von SAP-Systemen" festgehalten. Es stellt eine Einf hrung in die Programmierung mit der Programmiersprache ABAP dar.

For the first time, still-classified Soviet archives reveal the scope of communist terrorism under Joseph Stalin. This fact-filled chronicle of NKVD leader Nikolai Ezhov provides a compelling look into the workings of totalitarianism. Using Ezhov's own papers meticulously documenting his loyalty to Stalin, Ezhov's "official" biography written at the height of his status, and records of the KGB investigation leading to his fall, the authors reveal the full tragedy encompassed in Ezhov's bloody career.