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An algorithm for conditional-fault local diagnosis of multiprocessor systems under the MM⁎ model

Theoretical Computer Science 2024年 987卷

作者： Lv, Yali Lin, Cheng-Kuan Hsu, D. Frank Fan, Jianxi School of Information Technology Henan University of Chinese Medicine Zhengzhou China Department of Computer Science National Yang Ming Chiao Tung University Hsinchu Taiwan Undergraduate Degree Program of Systems Engineering and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Computer Science and Information Engineering Chung Cheng Institute of Technology NDU Taoyuan Taiwan Department of Computer and Information Science Fordham University New York United States School of Computer Science and Technology Soochow University Suzhou China

Diagnosis is a crucial subject for maintaining the reliability of multiprocessor systems. Under the MM⁎ diagnosis model, Sengupta and Dahbura proposed a polynomial-time algorithm with time complexity O(N5) to diagnose a system with N processors. In this paper, we propose a (α,β)-trees combination S(u,X,α,β) and give an algorithm to identify the fault or fault-free status of each processor for conditional local diagnosis under the MM⁎ model. According to our results, a connected network with a (α,β)-trees combination S(u,X,α,β) for a node u is conditionally locally (α+2β−3)-diagnosable at node u and the time complexity of our algorithm to diagnose u is O(α2β+αβ2). As an application, we show that our algorithm can identify the status of each node of n-dimensional star graph Sn if the faulty node number does not exceed 3n−8. Compared with existing algorithms, our algorithm allows more faulty nodes in a multiprocessor system. © 2024 Elsevier B.V.

关键词： Computational complexity

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End-to-End Reinforcement Learning for Torque Based Variable Height Hopping

End-to-End Reinforcement Learning for Torque Based Variable ...

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IEEE/RSJ International Conference on Intelligent Robots and systems (IROS)

作者： Raghav Soni Daniel Harnack Hauke Isermann Sotaro Fushimi Shivesh Kumar Frank Kirchner Department of Electronics Engineering Indian Institute of Technology (Banaras Hindu University) Varanasi India DFKI GmbH Robotic-s Innovation Center Bremen Germany Undergraduate Course Program of Mechanical and Systems Engineering Kyoto University Kyoto Japan

Legged locomotion is arguably the most suited and versatile mode to deal with natural or unstructured terrains. Intensive research into dynamic walking and running controllers has recently yielded great advances, both in the optimal control and reinforcement learning (RL) literature. Hopping is a challenging dynamic task involving a flight phase and has the potential to increase the traversability of legged robots. Model based control for hopping typically relies on accurate detection of different jump phases, such as lift-off or touch down, and using different controllers for each phase. In this paper, we present a end-to-end RL based torque controller that learns to implicitly detect the relevant jump phases, removing the need to provide manual heuristics for state detection. We also extend a method for simulation to reality transfer of the learned controller to contact rich dynamic tasks, resulting in successful deployment on the robot after training without parameter tuning.

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A mems _-preconcentrator employing a carbon molecular sieve membrane for highly volatile organic compound sampling

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Chemosensors 2021年第5期9卷

作者： Kuo, Hung-Yang Cheng, Wei-Riu Wu, Tzu-Heng Sheen, Horn-Jiunn Wang, Chih-Chia Lu, Chia-Jung Department of Chemistry National Taiwan Normal University Taipei11677 Taiwan Institute of Applied Mechanics National Taiwan University Taipei10617 Taiwan Department of Chemical and Materials Engineering Chung Cheng Institute of Technology National Defense University Taoyuan33509 Taiwan Undergraduate Degree Program of System Engineering and Technology National Yang Ming Chiao Tung University Hsinchu30010 Taiwan

This paper presents the synthesis and evaluation of a carbon molecular sieve membrane (CMSM) grown inside a MEMS-fabricated μ-preconcentrator for sampling highly volatile organic compounds. An array of µ-pillars measuring 100 µm in diameter and 250 µm in height were fabricated inside a microfluidic channel to increase the attaching surface for the CMSM. The surface area of the CMSM was measured as high as 899 m2/g. A GC peak amplification factor >2 × 104 was demonstrated with gaseous ethyl acetate. Up to 1.4 L of gaseous ethanol at the 100 ppb level could be concentrated without exceeding the capacity of this microchip device. Sharp desorption chromatographic peaks ( © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

关键词： Molecular sieves

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Electrical Properties of Spin-coated Indium Tin Oxide for Photosensor Applications

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Sensors and Materials 2022年第6期34卷 2053-2064页

作者： Shi, Shih-Chen Chen, Jian-An Lin, Yue-Feng Wang, Chih-Chia Department of Mechanical Engineering National Cheng Kung University No. 1 University Road Tainan City70101 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology No. 57 Sec. 2 Zhongshan Rd. Taiping Dist. Taichung411030 Taiwan Department of Chemical and Materials Engineering Chung Cheng Institute of Technology National Defense University Taoyuan33509 Taiwan Undergraduate Degree Program of System Engineering and Technology National Yang Ming Chiao Tung University Hsinchu30010 Taiwan

A high-performance indium tin oxide (ITO) coating is key in fabricating an efficient photosensor. The manufacturing process of ITO is complex and time-consuming. Therefore, establishing a production technology that is fast and capable of application to large areas is essential. The dispersion of nanoparticles in the process has a considerable influence on the photoelectric properties of ITO films. The degree of dispersion also determines the existence of the secondary phase, which is harmful during application. In this study, we compared the effect of different dispersion parameters such as the ultrasonic power and type of dispersant on the properties of spin-coated ITO films, i.e., the interfacial zeta potential, extinction ratio, and electrical properties. The electrical properties of spin-coated ITO films were affected by oxygen vacancies and the uniformity of tin oxide doping. Using an ultrasonic crusher with an output power of 600 W (3 h) with D305 dispersant, we obtained ITO particles with a minor hydrodynamic diameter of 176 nm. The spin-coated ITO film comprising these particles had a resistivity of as low as 10-4 Ω·cm after suitable heat treatment and a carrier concentration of approximately 1020 cm-3. The electrical properties of the spin-coated ITO were satisfactory for its application on a photodetector. Finally, we proposed that the service life of a sensor can be evaluated by monitoring the variation of the friction coefficient. © MYU K.K.

关键词： Tin oxides

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Mining the Sentiment of Online Gaming from Social-Media: A Consumer Insight

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Procedia Computer Science 2024年 234卷 1069-1075页

作者： Reny Nadlifatin Satria Fadil Persada Gilbert Aldrich Gunawan Yogi Tri Prasetyo Michael Nayat Young Anak Agung Ngurah Perwira Redi Kukuh Lukiyanto Department of Information Systems Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo Surabaya 60111 Indonesia Entrepreneurship Department BINUS Business School Undergraduate Program Bina Nusantara University Jakarta 11480 Indonesia School of Industrial Engineering and Engineering & Management Mapua University 658 Muralla St. Intramuros Manila 1102 Philippines Industrial Engineering Department Faculty of Engineering and Technology Sampoerna University Jakarta 12780 Indonesia

The gaming industry has changed since advanced technologies and hardware specifications were able to create the possibility of gaming with connective network or known as online gaming. Some communities are accepting positively, and others are contradicted. Thus, there is an urgency to know the insight from their sentiment. The present research extracts 10 thousand sentiments at social media with sentiment text analysis. The text is interpreted into six based emotions namely anger, disgust, fear, joy, sadness, and surprise. The mining analysis by lexicon valance aware dictionary and sentiment reasoner (VADER) projects the Joy emotions as the domination result with 94.74%. Positive joy expression on online gaming is revealed by extracting the sentiment analysis. In total, ten thousand data were collected from the corpus, which resulted in the happy sentiments that were experienced.

关键词： Sentiment Social media Online gaming Text analysis

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Micropatterning of functional lipid bilayer assays for quantitative bioanalysis

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Biomicrofluidics 2023年第3期17卷 031302页

作者： Montalbo, Reynaldo Carlos K. Tu, Hsiung-Lin Institute of Chemistry Academia Sinica Taipei11529 Taiwan Nanoscience and Technology Taiwan International Graduate Program Academia Sinica Taipei11529 Taiwan Department of Engineering and System Science National Tsing-Hua University Hsinchu300044 Taiwan Genome and Systems Biology Degree Program Academia Sinica National Taiwan University Taipei10617 Taiwan

Interactions of the cell with its environment are mediated by the cell membrane and membrane-localized molecules. Supported lipid bilayers have enabled the recapitulation of the basic properties of cell membranes and have been broadly used to further our understanding of cellular behavior. Coupled with micropatterning techniques, lipid bilayer platforms have allowed for high throughput assays capable of performing quantitative analysis at a high spatiotemporal resolution. Here, an overview of the current methods of the lipid membrane patterning is presented. The fabrication and pattern characteristics are briefly described to present an idea of the quality and notable features of the methods, their utilizations for quantitative bioanalysis, as well as to highlight possible directions for the advanced micropatterning lipid membrane assays. © 2023 Author(s).

关键词： Lipid bilayers

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Georeferencing System for Maneuvering of Autonomous Truck in Mining Environment

Georeferencing System for Maneuvering of Autonomous Truck in...

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International Carpathian Control Conference (ICCC)

作者： Emanuel Francisco Vicentini Carvalho Lucas Silva De Oliveira Murillo Ferreira Dos Santos Paolo Mercorelli Matheus Carvalho Gouveia Master Degree Program in Automation and Systems CEFET-MG Leopoldina Brazil Department of Mechatronics Engineering CEFET-MG Divinópolis MG Brazil Department of Electroelectronics CEFET-MG Leopoldina Brazil Institute for Production Technology and Systems (IPTS) Leuphana University of Lüneburg Lüneburg Germany Electrical Engineering B. Sc UFJF-MG Juiz de Fora MG Brazil

ISBN: (数字)9798350350708

ISBN: (纸本)9798350350715

Mining automation began in the 1960s to increase safety in underground mines. Today, robotic and autonomous systems perform specific mining activities, creating new oppor-tunities and a more efficient and safe industry. This paper proposes a novel solution for instrumentation for autonomous trucks working in open-pit mines, specifically during the parking maneuver to load ore. In this case, new hardware and firmware are developed to compute the future coordinates of the excavator bucket using two Global Positioning systems (GPS) receivers. In this approach, employing the concept of geometry and information from the GPS receivers, the future coordinates of the excavator bucket are calculated and made available to control the system, parking the autonomous truck in the desired position. The results demonstrate the accurate positioning of the off-highway truck during the ore-loading process, allowing for the correct execution of the truck's autonomous positioning maneuver.

关键词： Automation Receivers Excavation Hardware Real-time systems Safety Vehicle dynamics

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Exploring the Effectiveness of Work from Home: A Text Mining Analysis of Employee Perceptions and Experiences

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Procedia Computer Science 2024年 234卷 448-454页

作者： Reny Nadlifatin Satria Fadil Persada Amanda Beatrice Nadya Permata Putri Michael Nayat Young Yogi Tri Prasetyo Anak Agung Ngurah Perwira Redi Department of Information Systems Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo Surabaya 60111 Indonesia Entrepreneurship Department BINUS Business School Undergraduate Program Bina Nusantara University Jakarta 11480 Indonesia Industrial Engineering Department Universitas Pembangunan Nasional "Veteran" Jawa Timur Surabaya 60294 Indonesia School of Industrial Engineering and Engineering Management Mapua University 658 Muralla St. Intramuros Manila 1102 Philippines Industrial Engineering Department Faculty of Engineering and Technology Sampoerna University Jakarta 12780 Indonesia

Work from home (WFH) has become a global phenomenon that continues to grow, especially since the COVID-19 pandemic hit the world. Many organizations and companies are forced to adopt a remote working model to keep their employees safe. The usefulness of WFH is still up for dispute, though. Text mining analysis can be utilized to determine how beneficial working from home is. Sentiment analysis uses text analysis to gather ten thousand data from social media Tweets. Joy emotion is predicted to dominate with 83.98 percent according to the mining performed by the vocabulary valence aware dictionary and sentiment reasoner (VADER).

关键词： Sentiment Text mining Twitter Work from home

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Drone-borne calibration pulser for radio observatories detecting ultra-high-energy cosmic rays and neutrinos 38

Drone-borne calibration pulser for radio observatories detec...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Nam, J. Kuo, C.-Y. Shin, B.K. Chen, P. Chen, Y. Hsu, S.-Y. Huang, J.-J. Huang, M.-H.A. Leung, C.H. Liu, T.-C. Wang, S.-H. Wang, M.-Z. Wang, Y.-H. Besson, D. Novikov, A. Hornhuber, C. Young, R. Department of Physics National Taiwan University Taipei Taiwan Leung Center for Cosmology and Particle Astrophysics National Taiwan University Taipei Taiwan Ulsan National Institute of Science and Technology Ulsan Korea Republic of Department of Energy and Resources National United University Miaoli Taiwan Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu300 Taiwan Department of applied physics National PingTung university PingTung900 Taiwan Chung Cheng Institute of Technology National Defense University TaoYuan335 Taiwan Undergraduate Degree Program of Systems Engineering and Technology National Yang Ming Chiao Tung University Hsinchu300 Taiwan Department of Physics and Astronomy University of Kansas Lawrence United States Instrumentation Design Lab University of Kansas Lawrence United States Moscow Russia Institute of Astronomy and Astrophysics Academia Sinica Astronomy-Mathematics Building No. 1 Sec. 4 Roosevelt Rd. Taipei Taiwan

We report on the development of a drone-borne calibration pulser (cal-pulser) for radio observatories detecting ultra-high energy (UHE) cosmic rays and neutrinos. This system allows us to calibrate the radio detector in its field of view regardless of the accessibility of the site. The system is compact and sufficiently lightweight to be attached to a commercial drone. It consists of a solid-state high-power pulse generator, a programmable attenuator, a transmitting antenna, and a differential GPS (D-GPS) module. The drone, with the ∼1.3 kg payload, has a typical flight time of around 25 minutes, corresponding to a maximum flight distance of around 10 km. After developing the first version of the system in 2019, it successfully demonstrated its calibration performance with the TAROGE stations in Taiwan and the TAROGE-M station in Mt. Melbourne, Antarctica. In 2022, the system was upgraded with a dual-band D-GPS for more reliable operation and more accurate determination of the coordinates of the cal-pulser. In addition to the cal-pulser, we investigated aerial photogrammetry using the built-in camera and the D-GPS, which is an efficient method to determine the coordinates of the detector. For objects within 10 m of the drone, an accuracy of a few millimeter was achieved. These drone-borne cal-pulser and the photogrammetry have become essential calibration procedures in the TAROGE-M experiment. We suggest these approaches may find application in many other radio experiments that detect UHE cosmic rays and neutrinos, such as ARIANNA, BEACON, GRAND, as well as IceCube-Gen2. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic rays

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SHIP ELECTROMAGNETIC PULSE SURVIVABILITY TRIALS

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NAVAL ENGINEERS JOURNAL 1991年第3期103卷 136-140页

作者： JUMP, ME EMBERSON, WC Michael E. Jumpis the ship group leader in the Electromagnetic Pulse Branch Protection Systems Department Naval Surface Warfare Center White Oak Laboratory Silver Spring Md. He participated in the cooperative education program at the University of Maryland graduating in 1981 with a B.S. degree in electrical engineering. In 1985 Mr. Jump received his M.S. degree in electrical engineering from the Whiting School of Engineering Johns Hopkins University. During the EMPRESS II trial of USSDeyoDD-989 Mr. Jump functioned as the technical trial director and his responsibilities included insuring all trial objectives were appropriately met. William C. Embersonis a systems analyst in the Protection Systems Department of the Naval Surface Warfare Center White Oak Laboratory Silver Spring Md. He received his B.S. degree in electrical engineering from Purdue University in 1964 and his M.S. in electrical engineering at the Illinois Institute of Technology in 1971. Since joining NAVSWC in 1973 he has helped lead the Navy's EMP program to where it is today and has led the development of the center's nuclear warfare analysis capability. Currently he is responsible for the technical direction of an integrated system analysis for the entire spectrum of protection systems programs.

The Navy conducted an EMP (Electromagnetic Pulse) trial on a Spruance class destroyer (USS Deyo;DD-989) during July 1990 using the Electromagnetic Pulse Radio Frequency Environment Simulator for Ships (EMPRESS II). The Navy has selected a layered hardening approach consisting of platform level hardening and system level hardening to provide EMP survivability for the mission critical systems of surface ships. One key question is how much of the hardening can be allocated to and achieved by platform hardening? The other key questions are which systems will also require system level hardening and can system level hardening be effectively achieved? Prior to the trial, a platform level EMP hardening package was installed to evaluate the effectiveness of platform hardening techniques. Electromagnetic interference (EMI) fixes were installed when the EMI fixes were determined to provide system level hardening to emissions similar in frequency content to EMP. Temporary system level EMP hardening measures were also installed on selected combat systems and extensive pretrial EMP susceptibility assessments were performed on many of the ship systems. During the trial period, USS Deyo was subjected to over 700 sub-threat level pulses at increasing power levels. The highest test level during this trial was approximately 10dB below the EMP threat level. The induced transient currents exterior and interior to the ship and on a variety of systems were measured and used to evaluated the effectiveness of the platform hardening and system hardening. During the trial, a number of combat system operability tests were also conducted to help identify potential problem areas and evaluate system performance. This paper describes some of the events prior to and during the USS Deyo trial and the lessons learned as a result of the trial. The lessens learned from this trial will have a positive impact on future ship hardening efforts and EMP trials.

关键词： Warships

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