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15th International Conference on information Integration and Web-Based Applications and services, iiWAs 2013

作者： Yoshikuni, Ayano Watanabe, Chiemi Dept. of Computer Science Master's Program Ochanomizu University 2-1-1 Otsuka Bunkyo-ku Tokyo 112-8610 Japan Faculty of Engineering Information and Systems Tsukuba University 1-1-1 Tennoudai Tsukuba Ibaraki 305-0006 Japan

ISBN: (纸本)9781450321136

With the increased worldwide popularity of social networking services (sNss), the leakage of a user's private information is becoming a serious problem. An increased number of users now have multiple accounts on various social networks and they tend to use each account to write different user experiments. Aggregating information from different accounts leads to the unintended leakage of personal information. Therefore, we argue that sNs users should be vigilant in protecting the relationship between multiple accounts. In this paper, we propose the use of Account Reachability, a measure of privacy risk which demonstrates the possibility of a stranger finding a user's private account based on information in their public account. In addition, we present ARChecker, a tool to calculate the value of account reachability. ARChecker also provides advice on how to modify the user's profiles and messages to decrease the privacy risk. By checking the privacy measure and modifying the profiles and messages of their sNs accounts, users can protect their multiple accounts from the risk of an unintended leakage of personal information. © 2013 ACM.

关键词： User profile

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Development of numerical procedure for thermal hydraulic design of nuclear reactors with advanced two-fluid model (applicability of turbulent dispersion force model for middle diameter vertical pipe)

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japa...

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Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan society of Mechanical Engineers, Part B 2011年第776期77卷 987-991页

作者： Hosoi, Hideaki Yoshida, Hiroyuki Univ. of Tsukuba Graduate School of Systems and Information Engineering Master's Program 1-1-1 Tennoudai Tsukuba Ibaraki 305-8573 Japan

An advanced two-fluid model has been developed in Japan Atomic Energy Agency (JAEA). In this model, an interface tracking method is combined with a two-fluid model. In this procedure, liquid clusters and bubbles larger than a computational cell are calculated using the interface tracking method, and those smaller than a cell are simulated by the two-fluid model. A turbulent dispersion force term is one of the most important constitutive equations for advanced two-fluid model. We have developed the new model for turbulent dispersion force and verified the developed model using the 3-dimensional two-fluid model code ACE-3D, and the comparisons between the results of the analyses and air-water two-phase flow experiments in 200 mm diameter pipe. In this study, to verify the applicability of developed model for middle diameter vertical pipe, we compared between the analyses of results and air-water two-phase flow experiments in 38 mm diameter pipe. © 2011 The Japan society of Mechanical Engineers.

关键词： Constitutive equations

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Development of innovative techniques for testing and mapping private well water quality

Development of innovative techniques for testing and mapping...

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2005 IEEE systems and information engineering Design symposium

作者： Cherry, Jeff Freel, Craig Hover, Brigitte Jones, Alison sehgal, Akhil Louis, Garrick E. University of Virginia 151 Engineer's Way Charlottesville VA 22904 United States University of Virginia Department of Systems and Information Engineering University of Virginia School of Engineering and Applied Sciences McIntire School of Commerce Environmental Systems Engineering Program

ISBN: (纸本)0974455946

This paper documents the development of portable kit for testing and mapping water quality in the field, Previously, thorough testing and reporting on well water quality required multiple steps, including costly and time-consuming lab work that often made such testing impractical. To address this problem, a water sampling kit was created that consists of a pocket PC, a GPs receiver and probes to test for pollutants. The kit automatically records the geographical coordinates at the water sampling site, as well as the data collected by the probes into one spreadsheet. The data is then linked to a GIs for display in a simple and usable manner. The efficiency of the kit gives it the potential to create a new standard for sampling water, particularly in the case of private wells, which are currently inadequately monitored due to scarce state resources, This paper describes the process of researching, designing, and testing the water sampling system.

关键词： Water wells

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Underwater Visible Light Communication Using Phase-shift Keying and Rolling-shutter Effect

Underwater Visible Light Communication Using Phase-Shift Key...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Ritsuki Hamagami Tadashi Ebihara Naoto Wakatsuki Koichi Mizutani Master’s Program in Intelligent and Mechanical Interaction Systems University of Tsukuba Tsukuba Japan Faculty of Engineering Information and Systems University of Tsukuba Tsukuba Japan

ISBN: (数字)9781728198026

ISBN: (纸本)9781728198033

We propose an underwater visible light communication (VLC) system for use in drones. The transmitter modulates a message using phase-shift keying (PsK) and emits the signal as LED fast-blinking light. The receiver captures this pattern with a CMOs image sensor using a rolling-shutter effect, and demodulates PsK. In existing VLC systems, rolling-shutter effect is used to transmit baseband signals; this system transmits a passband signal tolerant of low-frequency optical interference noise. system performance was evaluated in test-tank experiments. Findings suggested that the VLC system with PsK outperformed that using on-off keying when noise frequency did not exceed carrier frequency.

关键词： Phase shift keying Interference Optical receivers Optical transmitters Optical sensors Optical noise Visible light communication

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Reinforcement Learning Compensator Robust to the Time Constants of First Order Delay Elements

Reinforcement Learning Compensator Robust to the Time Consta...

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IEEE International Conference on systems, Man and Cybernetics

作者： shoki Kobayashi Takeshi shibuya Master’s Program in Intelligent and Mechanical Interaction Systems University of Tsukuba Ibaraki Japan Faculty of Engineering Information and Systems University of Tsukuba Ibaraki Japan

ISBN: (数字)9781728185262

ISBN: (纸本)9781728185279

Reinforcement learning is a learning paradigm in which a control is learned automatically based on rewards through trial and error based on rewards. When reinforcement learning is employed for robot control, the action that is output by reinforcement learning and the input of the actuator are often the same. A robot's actuator has a time constant of a first-order delay element between input and output. Delays result in the deterioration of the reinforcement learning performance because the environments that contain them lack the Markov property. Although there have been studies of such environments, they are problematic in that performance deteriorates when the time constant of a first-order time-delay element greater than the control cycle. The principal contribution of this paper is to propose a compensator for reinforcement learning that is more effective than conventional methods for environments with a time constant of a first-order time-delay element greater than the control cycle. The purpose of the compensator is to minimize the difference between actions in delayed environments and those not in delayed environments. Experiments reveal that the compensator increases rewards within wider ranges than conventional methods.

关键词： Actuators Robot control Reinforcement learning Markov processes Manipulators Delays Cybernetics

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A study of the sensitivity of the Fuel Consumption to Driving strategy by Micro simulation

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Procedia Computer science 2019年 157卷 375-381页

作者： Fergyanto E. Gunawan Benfano soewito Nico surantha Tuga Mauritsius Nobumasa sekishita Industrial Engineering Department BINUS Graduate Program - Master of Industrial Engineering Bina Nusantara University Jakarta Indonesia 11480 Computer Science Department BINUS Graduate Program - Master of Computer Science Bina Nusantara University Jakarta Indonesia 11480 Information Systems Information Department BINUS Graduate Program - Master of Information Systems Management Bina Nusantara University Jakarta Indonesia 11480 Department of Mechanical Engineering Toyohashi University of Technology Toyohashi Aichi 441-8580 Japan

Global warming due to excessive emission greenhouse gases is a significant issue faced by humanity, and collectively, cars and trucks contribute about 20% to the entire global-warming gases. For a reason, recently, many attempts have been endured to reduce the emission and to increase fuel efficiency, including vehicle platooning, better driving strategy, and increasing engine efficiency. This study intends to provide a more detail assessment regarding the effects of the driving strategy to fuel consumption. For the purpose, the vehicle dynamics are quantified by employing the car-following model based on the optimal velocity model. The fuel consumption is estimated from the regression model of Ahn 18 . The result suggests that the braking distance strongly affects fuel consumption.

关键词： Optimal Velocity Model Micro simulation Car-Following Model Fuel Efficiency

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Classification of the structural Integrity by the General Vibration Method

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Procedia Computer science 2019年 157卷 382-387页

Traditionally, for the purpose of classifying the integrity of an engineering structure, one may use the information of the natural frequencies or mode shapes or some other measures derived from the two. In this research, we propose a classification method on the basis of the general vibration model. The general vibration model is essentially a set of differential equations describing the dynamics of the structure under consideration. For the purpose of damage detection, a deviation of the general vibration model from the dynamic equilibrium point marks the occurrence of the damage. To demonstrate the effectiveness of the method, we study two simplest dynamical systems consisting of one- and two-concentrated masses subjected to a prescribed dynamic load. The structural damages are introduced artificially by reducing the stiffness of spring in the structures. We find that the general vibration model is more sensitive to damages than the traditional methods.

关键词： General Vibration Model structural Integrity structural Health Monitoring Power spectral Density Damage Index

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A novel evolution-based recommendation system 12

A novel evolution-based recommendation system

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12th International Conference on Ubi-Media Computing, Ubi-Media 2019

作者： Chen, Yi-Cheng Chu, Yen-Lung Hui, Lin Chen, sheng-Chih Thaipisutikul, Tipajin Weng, Kai-Ze Department of Information Management National Central University Taiwan Department of Computer Science and Information Engineering Tamkang University Taiwan Department of Innovative Information and Technology Tamkang University Taiwan Master's Program of Digital Content and Technologies College of Communication National ChengChi University Taiwan Department of Computer Science and Information Engineering National Central University Taiwan

ISBN: (纸本)9781728128207

Matrix factorization (MF) technique has been widely utilized in recommendation systems due to the precise prediction of users' interests. Prior MF-based methods adapt the overall rating to make the recommendation by extracting latent factors from users and items. However, in real applications, people's preferences usually vary with time;the traditional MF-based methods could not properly capture the change of users' interests. In this paper, by incorporating the recurrent neural network (RNN) into MF, we develop a novel recommendation system, M-RNN-F, to effectively describe the preference evolution of users over time. A learning model is proposed to capture the evolution pattern and predict the user preference in the future. The experimental results show that M-RNN-F performs better than other state-of-the-art recommendation algorithms. In addition, we conduct the experiments on real world dataset to demonstrate the practicability. © 2019 IEEE.

关键词： Recommender systems

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Memory-aware sLA-based mechanism for shared-mesh WDM networks

Memory-aware SLA-based mechanism for shared-mesh WDM network...

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2011 3rd International Congress on Ultra Modern Telecommunications and Control systems and Workshops, ICUMT 2011

作者： Nafarieh, Alireza sivakumar, shyamala C. Phillips, William Robertson, William Internetworking Engineering Program Dalhousie University Halifax NS Canada Computing and Information Systems Sobey School of Business Saint Mary's University Halifax NS Canada

ISBN: (纸本)9781457706820

The paper presents a dynamic provisioning mechanism through which service providers can exploit the unused allowable down time of the connections to serve the additional upcoming requests. The algorithm work based on the holding time of the connections and the failure arrival rate over the selected primary or backup paths. The proposed mechanism in this paper routes the requests in a way that any service level agreement (sLA) violation is either avoided or minimized. To achieve this goal, the already established paths are flagged with a newly proposed path metric, path risk factor, to create a memory-aware mechanism of paths' history showing the risk tolerance to sLA violation. This path attribute can be disseminated over the network as a metric of prospective connections. The algorithm takes advantage of the already established connections' history to select the best path regarding the sLA violation with the lowest cost. simulation results verify that the proposed mechanism has better performance in terms of the blocking rate, the availability satisfaction rate, and the resource utilization than existing algorithms. Performance evaluation is done over two different simulation environments, the network with high link failure arrival rate and the network with normal link failure arrival rate. In addition to the better performance over both network topologies, the algorithm provides more revenue for service providers compared to standard and existing algorithms. © 2011 HTE.

关键词： Control systems

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Enhanced sERs Detection Using TiO2sub> Photonic Crystals with In-situ-Grown Au/Ag Nanoparticles

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ACs Applied Nano Materials 2025年

作者： Wang, Zeyu Wu, Jake Li, Xiangming Chen, Xiaoliang He, Chunjie shao, Jinyou Louh, Rong-Fuh Frontier Institute of Science and Technology and Micro- and Nanotechnology Research Center State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong University Shaanxi Xi’an 710049 China Master’s Program of Biomedical Informatics and Biomedical Engineering Feng Chia University Taichung 407 Taiwan Micro-and Nanotechnology Research Center State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong University Shaanxi Xi’an 710049 China Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education International Center for Dielectric Research Shannxi Engineering Research Center of Advanced Energy Materials and Devices Xi’an Jiaotong University Shaanxi Xi’an 710049 China

surface-enhanced Raman spectroscopy (sERs) has been widely utilized for the detection of disease biomarkers, pesticides, and environmental pollutants due to its exceptional sensitivity, real-time responsiveness, and unique interactions between adsorbates and substrates. Here, we present a composite metal/semiconductor material comprising TiO2sub> nanosphere substrates integrated with in-situ-grown Au or Ag nanoparticles (NMNPs@TiO2sub>). These composite nanospheres are assembled by an electrophoretic self-assembly process to form a photonic crystal structure with three-dimensionally ordered periodic geometric features and show remarkable sensitivity and stability for sERs detection, achieving a detection limit as low as 10-9sup> M for Rhodamine 6G. Beyond merely enhancing sERs signals by generating uniformly distributed metal plasmonic “hot spots” on TiO2sub> substrates, similar to traditional semiconductor substrates, this photonic crystal substrate also exhibits advanced light absorption and localization capabilities. The absorbed light drives the defect excitation of TiO2sub>, facilitated by its multicrystalline structure. Excited electrons from the TiO2sub> nanospheres contribute to the enhancement of localized surface plasmon resonance through charge transfer to noble-metal nanoparticles. Additionally, the synthesis of NMNPs@TiO2sub> nanospheres avoids the use of toxic reagents, and substrate assembly is achieved through a simple electrodeposition process. This approach simplifies fabrication while enabling the production of sERs detectors with exceptional spatial and temporal signal stability. With increasing demands for higher detection sensitivity, signal uniformity, and detector durability for sERs detection applications, the NMNPs@TiO2sub> nanosphere-based photonic crystal substrate underscores its potential to significantly improve the sERs detection efficiency, making it ideal for ultrasensitive che

关键词： electric deposition photonic crystal semiconductor sERs synthesis

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