Christoph Meinel Livres

This book offers a comprehensive review of the blogosphere, aiming to serve as a reliable guide for understanding its vast diversity. It addresses how to navigate the complexity of countless blogs and their myriad posts, collectively forming the blogosphere. The primary goal is to enhance readers' awareness of this phenomenon, focusing on its structure and characteristics. By examining individual blogs and their technical aspects, readers can better appreciate how each blog is interconnected within the broader blogosphere. The analogy of continents is used to describe the blogosphere's shape, with example blogs illustrating its defining features. Following this structural analysis, the book details methods for automatically retrieving information from the vast data within the blogosphere, highlighting the challenges involved. Additionally, it introduces a blog search platform named BLOGINTELLIGENCE, showcasing the tools and features developed over recent years to facilitate exploration of the blogosphere. This work ultimately seeks to empower readers with the knowledge needed to effectively analyze and engage with the rich landscape of blogs.

Der Begriff Blockchain ist in letzter Zeit populär geworden, doch nur wenige wissen, was er bedeutet. Eine Umfrage aus dem ersten Quartal 2017 zeigt, dass nur 35 Prozent der deutschen Mittelständler mit dem Begriff vertraut sind. Die Blockchain-Technologie ist aufgrund ihrer rasanten Entwicklung und globalen Marktakzeptanz von großem Interesse. Viele betrachten sie als Allzweckwaffe, die jedoch schwer zugänglich ist, oder als Hacker-Technologie für das Darknet. Die Innovation liegt in der Kombination bestehender Ansätze wie dezentralen Netzwerken, Kryptographie und Konsensmodellen, die einen vertrauenslosen Werte-Austausch ermöglichen. Diese Studie des Hasso-Plattner-Instituts hilft Lesern, ihren eigenen Standpunkt zur Blockchain-Technologie zu finden und zwischen echten Innovationen und bloßem Hype zu unterscheiden. Die Autoren analysieren sowohl positive als auch negative Aspekte der Blockchain-Architektur und bieten Anpassungs- und Lösungsvorschläge für einen effizienten Einsatz. Unternehmen sollten klare Ziele mit einem angemessenen Kosten-Nutzen-Verhältnis definieren und die Möglichkeiten sowie Grenzen der Technologie berücksichtigen. Die Studie behandelt auch wichtige Fragen wie Skalierbarkeit, Konsensalgorithmen und Sicherheitsaspekte, einschließlich potenzieller Angriffe und Abwehrmaßnahmen. Zudem werden verschiedene Umsetzungsmöglichkeiten und relevante Projekte vorgestellt, wobei die noch fehlenden einheitlichen Stan

Design and Implementation of service-oriented architectures imposes a huge number of research questions from the fields of software engineering, system analysis and modeling, adaptability, and application integration. Component orientation and web services are two approaches for design and realization of complex web-based system. Both approaches allow for dynamic application adaptation as well as integration of enterprise application. Commonly used technologies, such as J2EE and .NET, form de facto standards for the realization of complex distributed systems. Evolution of component systems has lead to web services and service-based architectures. This has been manifested in a multitude of industry standards and initiatives such as XML, WSDL UDDI, SOAP, etc. All these achievements lead to a new and promising paradigm in IT systems engineering which proposes to design complex software solutions as collaboration of contractually defined software services. Service-Oriented Systems Engineering represents a symbiosis of best practices in object-orientation, component-based development, distributed computing, and business process management. It provides integration of business and IT concerns

The “HPI Future SOC Lab” is a cooperation of the Hasso-Plattner-Institut (HPI) and industrial partners. Its mission is to enable and promote exchange and interaction between the research community and the industrial partners. The HPI Future SOC Lab provides researchers with free of charge access to a complete infrastructure of state of the art hard- and software. This infrastructure includes components, which might be too expensive for an ordinary research environment, such as servers with up to 64 cores. The offerings address researchers particularly from but not limited to the areas of computer science and business information systems. Main areas of research include cloud computing, parallelization, and In-Memory technologies. This technical report presents results of research projects executed in 2012. Selected projects have presented their results on June 18th and November 26th 2012 at the Future SOC Lab Day events.

The authors give a detailed summary about the fundamentals and the historical background of digital communication. This includes an overview of the encoding principles and algorithms of textual information, audio information, as well as images, graphics, and video in the Internet. Furthermore the fundamentals of computer networking, digital security and cryptography are covered. Thus, the book provides a well-founded access to communication technology of computer networks, the internet and the WWW. Numerous pictures and images, a subject-index and a detailed list of historical personalities including a glossary for each chapter increase the practical benefit of this book that is well suited as well as for undergraduate students as for working practitioners.

Forschung meets Business„ - diese Kombination hat in den vergangenen Jahren immer wieder zu zahlreichen interessanten und fruchtbaren Diskussionen geführt. Mit dem Symposium “Sicherheit in Service-orientierten Architekturen„ führt das Hasso-Plattner-Institut diese Tradition fort und lud alle Interessenten zu einem zweitägigen Symposium nach Potsdam ein, um gemeinsam mit Fachvertretern aus der Forschung und Industrie über die aktuellen Entwicklungen im Bereich Sicherheit von SOA zu diskutieren. Die im Rahmen dieses Symposiums vorgestellten Beiträge fokussieren sich auf die Sicherheitsthemen “Sichere Digitale Identitäten und Identitätsmanagement„, “Trust Management„, “Modell-getriebene SOA-Sicherheit„, “Datenschutz und Privatsphäre„, “Sichere Enterprise SOA„, und “Sichere IT-Infrastrukturen".

The interactive online educational platform openHPI, from Hasso Plattner Institute (HPI), offers free courses in information technology and computer science. Launched in 2011, it follows the model of "Massive Open Online Courses" (MOOCs) that began at elite U.S. universities. openHPI provides instructional videos, supplementary reading materials, self-tests, homework, and a social discussion forum, fostering a virtual learning community. Unlike traditional lecture platforms that offer recorded lectures on demand, openHPI features structured online courses with fixed start dates and a six-week schedule of multimedia and interactive content. Each week focuses on a specific chapter, with participants receiving learning videos, texts, self-tests, and exercises at the start. The platform encourages interaction through a discussion forum, allowing participants to engage with instructors and peers, ask questions, and delve deeper into topics. Learners can contribute to the course through blog posts or tweets, facilitating discussion and collaboration. This approach transforms participants into active contributors, linking the educational experience to a social learning network.

Together with industrial partners Hasso-Plattner-Institut (HPI) is currently establishing a “HPI Future SOC Lab,” which will provide a complete infrastructure for research on on-demand systems. The lab utilizes the latest, multi/many-core hardware and its practical implementation and testing as well as further development. The necessary components for such a highly ambitious project are provided by renowned companies: Fujitsu and Hewlett Packard provide their latest 4 and 8-way servers with 1-2 TB RAM, SAP will make available its latest Business byDesign (ByD) system in its most complete version. EMC² provides high performance storage systems and VMware offers virtualization solutions. The lab will operate on the basis of real data from large enterprises. The HPI Future SOC Lab, which will be open for use by interested researchers also from other universities, will provide an opportunity to study real-life complex systems and follow new ideas all the way to their practical implementation and testing. This technical report presents results of research projects executed in 2011. Selected projects have presented their results on June 15th and October 26th 2011 at the Future SOC Lab Day events.