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  1. Article

    Open Access

    On the optimality of quantum circuit initial map** using reinforcement learning

    Quantum circuit optimization is an inevitable task with the current noisy quantum backends. This task is considered non-trivial due to the varying circuits’ complexities in addition to hardware-specific noise,...

    Norhan Elsayed Amer, Walid Gomaa, Keiji Kimura, Kazunori Ueda in EPJ Quantum Technology (2024)

  2. No Access

    Chapter and Conference Paper

    DTN Routing Method Based on Records of Data Transmission Paths

    The authors focus on the message ferrying method, which is one of the route selection methods on DTN (Delay/Disruption-Tolerant Networking). In the message ferrying method, mobile nodes called ferry nodes tran...

    Kazunori Ueda, Kouki Yano in Advances on Broad-Band and Wireless Comput… (2024)

  3. No Access

    Chapter and Conference Paper

    Implementing the  \(\lambda _{GT}\) Language: A Functional Language with Graphs as First-Class Data

    Several important data structures in programming are beyond trees; for example, difference lists, doubly-linked lists, skip lists, threaded trees, and leaf-linked trees. They can be abstracted into graphs (or ...

    ** Sano, Kazunori Ueda in Graph Transformation (2023)

  4. Article

    Open Access

    On the learnability of quantum state fidelity

    Current quantum processing technology is generally noisy with a limited number of qubits, stressing the importance of quantum state fidelity estimation. The complexity of this problem is mainly due to not only...

    Norhan Elsayed Amer, Walid Gomaa, Keiji Kimura, Kazunori Ueda in EPJ Quantum Technology (2022)

  5. No Access

    Chapter and Conference Paper

    DTN Routing Method Based on Node Movement Prediction and Message Deliverability

    In recent years, sensors have been deployed for measurement for weather, environment, or traffic. The obtained data is used for analysis or research. When such sensors are deployed in huge numbers, cost of rea...

    Kazunori Ueda in Advances in Network-Based Information Systems (2022)

  6. No Access

    Chapter and Conference Paper

    Routing Method Based on Data Transfer Path in DTN Environments

    In recent years, temporary network construction using Delay Tolerant Networking (DTN) has attracted attention as a preparation for communication infrastructure failures that may occur due to disasters. DTN is ...

    Kazuma Ikenoue, Kazunori Ueda in Advances on Broad-Band Wireless Computing,… (2020)

  7. No Access

    Chapter and Conference Paper

    DTN Sub-ferry Nodes Placement with Consideration for Battery Consumption

    When networking infrastructures are damaged due to a serious disaster such as earthquakes, communications on the Internet might be inconvenient. Many researches about Delay Tolerant Networking (DTN) have been ...

    Kazunori Ueda in Advances in Networked-based Information Systems (2020)

  8. No Access

    Chapter and Conference Paper

    Constraint-Based Modeling and Symbolic Simulation of Hybrid Systems with HydLa and HyLaGI

    Hybrid systems are dynamical systems that include both continuous and discrete changes. Modeling and simulation of hybrid systems can be challenging due to various kinds of subtleties of their behavior. The de...

    Yunosuke Yamada, Masashi Sato, Kazunori Ueda in Cyber Physical Systems. Model-Based Design (2020)

  9. Article

    Open Access

    Fatal community-acquired Bacillus cereus pneumonia in an immunocompetent adult man: a case report

    Bacillus cereus is a gram-positive rod bacterium that is responsible for food poisoning. It is naturally widely distributed, and thus often contaminates cultures. Although it is rarely considered responsible, it ...

    Ryosuke Ishida, Kazunori Ueda, Tadashi Kitano, Tomohiko Yamamoto in BMC Infectious Diseases (2019)

  10. No Access

    Chapter and Conference Paper

    Score-Based Message Ferrying Approach for Evacuees on Delay Tolerant Networks

    In recent years, network construction using DTN has attracted attention, in preparation for damage of communication infrastructure caused by a large-scale disaster. In the message ferry method which is one of ...

    Kazuma Ikenoue, Kazunori Ueda in Advances on Broadband and Wireless Computi… (2019)

  11. No Access

    Chapter and Conference Paper

    Peer-to-Peer Data Distribution System with Browser Cache Sharing

    Many services that provide video contents such have been available. Traffic caused by watching videos has been increasing and the traffic will consume network resources on the Internet or networks of contents ...

    Kazunori Ueda, Yusei Irifuku in Advances in Network-Based Information Systems (2019)

  12. No Access

    Chapter and Conference Paper

    Introducing Symmetry to Graph Rewriting Systems with Process Abstraction

    Symmetry reduction in model checking is a technique for reducing state spaces by exploiting the inherent symmetry of models, i.e., the interchangeability of their subcomponents. Model abstraction, which abstra...

    Taichi Tomioka, Yutaro Tsunekawa, Kazunori Ueda in Graph Transformation (2019)

  13. No Access

    Chapter and Conference Paper

    Performance Evaluation of Peer–to–Peer Network Applications on Multiple Overlay Networks

    A peer–to–peer (P2P) network applications support peers or contents search based on overlay networks constructed by considering several criteria. Since overlay networks are constructed based on profiles of pee...

    Kazunori Ueda in Advances in Network-Based Information Systems (2018)

  14. Article

    Renewal of the Major Fields

    Masami Hagiya, Kazunori Ueda, Ryutaro Ichise, Ferdinand Peper in New Generation Computing (2017)

  15. No Access

    Chapter and Conference Paper

    Symbolic Analysis of Hybrid Systems Involving Numerous Discrete Changes Using Loop Detection

    Hybrid systems are dynamical systems that include both continuous and discrete changes. Some hybrid systems involve a large or infinite number of discrete changes within an infinitesimal-width region of phase ...

    Kenichi Betsuno, Shota Matsumoto in Cyber Physical Systems. Design, Modeling, … (2017)

  16. Chapter and Conference Paper

    Unification of Hypergraph \(\lambda \) -Terms

    We developed a technique for modeling formal systems involving name binding in a modeling language based on hypergraph rewriting. A hypergraph consists of graph nodes, edges with two endpoints and edges with m...

    Alimujiang Yasen, Kazunori Ueda in Topics in Theoretical Computer Science (2017)

  17. No Access

    Chapter and Conference Paper

    Logic/Constraint Programming and Concurrency: The Hard-Won Lessons of the Fifth Generation Computer Project

    The technical goal of the Fifth Generation Computer Systems (FGCS) project (1982–1993) was to develop Parallel Inference technologies, namely systematized technologies for realizing knowledge information processi...

    Kazunori Ueda in Functional and Logic Programming (2016)

  18. No Access

    Chapter

    Towards a Substrate Framework of Computation

    A grand challenge in computing is to establish a substrate computational model that encompasses diverse forms of non-sequential computation. This paper demonstrates how a hypergraph rewriting framework nicely ...

    Kazunori Ueda in Concurrent Objects and Beyond (2014)

  19. No Access

    Article

    HyperLMNtal: An Extension of a Hierarchical Graph Rewriting Model

    LMNtal (pronounced “elemental”) is a language model based on hierarchical graph rewriting that uses point-to-point links to represent connectivity and membranes to represent hierarchy. LMNtal was...

    Kazunori Ueda, Seiji Ogawa in KI - Künstliche Intelligenz (2012)

  20. No Access

    Article

    An interval-based SAT modulo ODE solver for model checking nonlinear hybrid systems

    This paper presents a bounded model checking tool called \({\texttt{Hydlogic}}\) for hybrid systems. It translates a ...

    Daisuke Ishii, Kazunori Ueda, Hiroshi Hosobe in International Journal on Software Tools fo… (2011)

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