Digital Library of Gesellschaft für Informatik e.V.
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Quantum Program Improvement with Multi-Objective Genetic Programming
No full textTo tackle the challenge of debugging and optimizing quantum programs, we propose the Genetic Quantum Program Improver (GeQuPI), a framework for the automated improvement of the accuracy and efficiency of quantum circuits. Our framework uses techniques from quantum information theory and applies multi-objective genetic programming, which can be further hybridized with quantum-aware optimizers. To evaluate GeQuPI, it is applied to 47 quantum programs reused from literature and publicly available libraries. The results of the evaluation demonstrate that GeQuPI is capable of correcting faulty programs and optimizing inefficient ones for a large share of the studied programs, showing an average improvement of efficiency of 35%
ReProVide: Query Optimisation and Near-Data Processing on Reconfigurable SoCs for Big Data Analysis
No full textThe goal of ReProVide is to provide novel hardware and optimisation techniques for scalable, high-performance processing of Big Data. The Programmable System-on-Chip (PSoC) architecture of ReProVide includes a reconfigurable FPGA for the support of hardware accelerators for various operators on relational and streaming data. Such PSoCs can be used to process data directly at the source, such as data from attached NVMes, using application-specific accelerators. For example, compute-intensive tasks such as JSON parsing can be offloaded to the hardware accelerators, reducing CPU load. In addition, reducing the volume of data at an early stage avoids unnecessary data movements, resulting in lower energy consumption. This demo illustrates the opportunities and benefits of hardware-reconfigurable, FPGA-based PSoCs for near-data processing. The demo allows users to run two queries and select which operations should be pushed onto the SoC for near-data hardware acceleration. From no acceleration to maximum acceleration, a 52x improvement in throughput and 67x lower energy consumption can be observed
Data-driven Database Engineering at Snowflake
No full textSnowflake’s cloud-native data platform processes billions of queries daily and scans petabytes of data, creating unique database engineering challenges. As a service-oriented platform, we rely on detailed query telemetry, workload replay, and staged rollouts to drive continuous engine innovation. This talk highlights two projects from our Berlin engineering team that exemplify this data-driven approach to database engineering. First, we examine how query telemetry and workload analysis informed the transformation of Snowflake’s analytical execution engine to handle transactional-scale throughput. Second, we explore the redesign of Snowflake’s dynamic join strategy, replacing a static method with a holistic, adaptive algorithm. Through rigorous testing, workload replay, and incremental rollouts, we ensured a smooth production transition for customers. By examining these case studies, we provide practical insights into the intersection of database research and large-scale system engineering. The lessons learned highlight how data-driven methods can effectively address complex engineering challenges in modern database systems, offering perspectives relevant to both academic researchers and industry practitioners
Interdisziplinärer Informatikunterricht: Ergebnisse verschiedener empirischer Untersuchungen aus Baden-Württemberg
No full textInformatikunterricht ist in Deutschland in den Bundesländern unterschiedlich in Bildungspläne integriert. In Baden-Württemberg wurde seit 2018 ergänzend zum Pflichtfach Informatik in Klasse 7, das Wahlpflichtfach Informatik, Mathematik, Physik (IMP) eingeführt. Hiermit ergeben sich verschiedene Fragestellungen hinsichtlich der interdisziplinären Umsetzung sowie der Interessen, Kurswahlentscheidungen
und beruflichen Orientierung der Schüler:innen. Der interdisziplinäre Kontext bietet die
Möglichkeit Physical Computing, KI und Design Thinking in den Unterricht zu integrieren. In einer qualitativen Interviewstudie wurden N₁ = 21 IMP-Lehrpersonen u. a. zu den o. a. Aspekten befragt. Weiterhin wurden in einer quantitativen und qualitativen Fragebogenstudie N₂ = 336 IMP-Schüler:innen am Ende der 10. Klasse zu ihren Interessen, der Vernetzung und weiteren Aspekten befragt. Die Ergebnisse liefern einen
interessanten Einblick in die interdisziplinäre Umsetzung von IMP und können Hinweise zur Bildungsplanarbeit sowie zur unterrichtlichen Umsetzung interdisziplinärer Fächer liefern
Viability of Rust for Avionics Software Development -- Current status and way forward
No full textThe trend towards more software functionality in less time is also true for avionics software. New development tools are needed to meet this trend, including the programming language. Rust provides language features such as extended memory safety and concurrency that are desired in avionics software. However, it must compete with an established software development ecosystem around C/C++. We propose requirements that a new programming language should meet to justify the effort of adoption in the aerospace industry and evaluate the current state of Rust accordingly. As part of the evaluation, we provide an example of how to add support for a new target to the Rust compiler for the RTEMS operating system used in the aerospace industry. Overall, Rust looks like a promising candidate for avionics software development and offers a gradual path of adoption, including qualification to aerospace standards
Toward Seamless Mobility-as-a-Service
No full textWith growing awareness of sustainability and convenience expectations, customers are increasingly demanding integrated and seamless mobility in the form of mobility-as-a-service (MaaS). However, as centralized MaaS platforms have thus far failed to integrate a critical share of mobility service providers (MSPs), travelers lack opportunities to efficiently combine the various mobility services required for seamless end-to-end itinerary coverage. Particularly, MSPs often refuse to collaborate by devolving control over customer interfaces or sensitive data owing to threats of market power concentration. While alternative blockchain-based approaches aim to provide equal market access, they cannot sufficiently align competing business goals and face substantial problems resulting from the replicated processing of sensitive data. Both researchers and practitioners have recently suggested decentralized digital identity management enabled by digital wallets as a promising mechanism to exchange verifiable identity attributes while mitigating problems related to data aggregation. Following a design science research approach, the article accordingly explores how digital wallets can address the shortcomings of existing approaches to MaaS. It contributes a novel IS architecture and principles for a design at the nexus of centralized and decentralized solutions to mitigate tensions between cooperation and competition. Further, the findings indicate that when building decentralized solutions, one should also consider components beyond blockchain and smart contracts
What are your intentions with my data? A tool to enhance consumer data sovereignty in digital ecosystems
No full textAs data collection enhances, consumer data sovereignty becomes increasingly important. Despite initiatives like the GDPR, information asymmetries persist, and privacy policies remain complex or lengthy, often preventing consumers from giving truly informed consent for data sharing. Building on established concepts for more informed consent, we propose a tool — the consent registry — to enable informed consent and strengthen consumer data sovereignty while being easy to implement in a variety of digital ecosystems and applications. Our concept takes three different stakeholder groups into consideration, the consumer, the inquiring institution and the application provider, since often times the consumer is not directly connected to inquiring institutions and instead relies on third-party applications in digital ecosystems. Our tool employs case-to-case consent, describing that consent is valid only for a singular request. This empowers consumers to exercise informed control over data collection and usage while enhancing data availability across institutional borders in digital ecosystems
Tutorial: Understanding Application Performance on Modern Hardware: Profiling Foundations and Advanced Techniques
No full textEngineering of performance-sensitive applications requires a deep understanding of the interaction between hardware and software—particularly as modern hardware is increasingly complex. However, it is often challenging to couple findings from external profiling tools with knowledge from the application. This tutorial exemplifies how performance counters and sampling-based approaches can be leveraged within the application
„Die interne IT-Organisation als Business Partner“
No full textVom Business gefordert, von externen Anbietern eingeklemmt – interne IT-Organisationen stehen mehr denn je unter Druck, sich ständig ändernden Anforderungen anzupassen. Eine IT-Business-Partnerschaft ist derzeit das geforderte Maß. Im Klartext: ein neues Business Modell muss her. Ebensolche existieren mit dem Multi-Provider-Management und dem Service Brokerage. Wie die Unternehmensstrategie die Integration der IT als Wettbewerbsfaktor auch vorsieht – die Transformation hin zu einer Management Organisation ist unerlässlich. Digitalkompetenz, gerade in Bezug auf die digitale Wertschöpfung, der Umgang mit Technologien wie künstliche Intelligenz und Plattformen sowie Service Integration wird immer dringlicher, wenn es um die Neupositionierung geht. Gerade deshalb ist es erforderlich, dass digitale und IT-Kompetenz in der Unternehmensführung vertreten ist. Konsequenter Umbau verlangt das Loslassen von operativer IT. Mit gezielten Sourcing-Maßnahmen lassen sich Freiräume schaffen, um mehr Aufmerksamkeit als bisher den Fachbereichen zu widmen. Weiter gedacht erreicht eine IT-Business-Partnerschaft erst dann den erforderlichen Wirkungsgrad, wenn sich IT-Organisationen als Business Technology Solutions, mit neuen Rollen und geschäftsorientieren Kompetenzfeldern aufgestellt hat. Geschäftliches Verständnis und technologisches Wissen bilden Grundlagen für digitale und wertschöpfende Lösungen. Vorstellbar ist, dass unternehmensinterne IT-Organisationen aus dem Organigramm verschwinden und BTS als virtueller Layer über alle Geschäftsbereiche hinweg die avisierte IT-Business-Partnerschaft gestaltet. Nicht als eigene Stabsstelle, sondern integriert in alle Organisationseinheiten. Die IT-Business-Partnerschaft – das muss allen Beteiligten klar sein – beendet die Daseinsberechtigung klassischer IT-Organisationen. Da drunter klappt die Idee nicht. Requested by the business, squeezed by external providers—internal IT organizations are under more pressure than ever to adapt to constantly changing requirements. An IT-business partnership is currently the required standard. In plain language: a new business model is needed. The same applies to multi-provider management and service brokerage. No matter how the corporate strategy envisages the integration of IT as a competitive factor, the transformation to a management organization is essential. Digital expertise, particularly in relation to digital value creation, the use of technologies such as artificial intelligence and platforms as well as service integration, is becoming increasingly urgent when it comes to repositioning. This is precisely why it is necessary for digital and IT expertise to be represented in company management. Consistent restructuring requires letting go of operational IT. Targeted sourcing measures can create the freedom to devote more attention to the specialist areas than before. Thinking further, an IT-business partnership only achieves the required level of effectiveness when IT organizations have positioned themselves as business technology solutions with new roles and business-oriented areas of expertise. Business understanding and technological knowledge form the basis for digital and value-adding solutions. It is conceivable that internal IT organizations will disappear from the organizational chart and BTS will act as a virtual layer across all business areas to shape the envisaged IT-business partnership. Not as a separate staff unit but integrated into all organizational units. The IT business partnership—this must be clear to everyone involved—ends the raison d’être of traditional IT organizations. The idea doesn’t work under that
