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A flexible framework for web-based virtual reality presentation of cultural heritage

AIP Conference Proceedings 2021年第1期2333卷

作者： Dimo Chotrov Angel Bachvarov 1Technical University Sofia Faculty of Computer Systems and Technologies Department Programming and Computer Technologies Bulgaria 2Technical University Sofia Faculty of Mechanical Engineering Department Automation of Discrete Production Engineering Bulgaria

The Virtual Reality (VR) experiences are great for an engaging presentation creating wide public awareness of cultural heritage, especially if the experience is built on a web-based technology. One of the still posing challenges is that once an application has been developed, for example for a virtual museum or a virtual tour, it usually remains fixed to an embedded in the application model. Adding new functionalities or interaction paradigms needs additional development and new deployment. In this paper, we propose a framework, which achieves the decoupling of an experience from the used models and interaction paradigms through scene and input templates and configuration files. This allows an easy way for generation of a variety of experiences even by people with no or limited programming skills.

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A blockchain based virtual machine detection system app market

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AIP Conference Proceedings 2023年第1期2523卷

作者： Karthikeyan Palaniappan V. Anantha Krishna M. Ramasubramanian T. K. S. Rathish Babu 1Department of Centre for System Design Computer Science and Engineering Chennai Institute of Technology Chennai Tamil Nadu India 2Department of Computer Science and Engineering Sridevi Women's Engineering College Hyderabad Telangana India

Smartphone malware's rapid development suggests malicious programme developers moving from standard PC systems to smart phone computers. Technology experts are now also developing new methods of anti-malware for adequate security. For the identification of smart phone dangerous applications, this study proposes a Blockchain-based malware mitigation framework (B2MDF) (app stores). For the ultimate judgement, the system combines two internal and external proprietary block chains to establish a private dual blockchain and a blockchain alliance. Blocks produced from both static and dynamically driven function removers are stored in the private internal blockchain stores, whilst blocks for current models are detected in the external blockchain stores. B2MDF also exchanges function blocks with third parties, which allows providers of anti-malware to offer more exact *** rating permissions, we employed the idea of information value. Furthermore, because blockchain has great dependability and cheap cost, we developed a consensus-based blockchain framework for generating more concrete predictions. The top 45 permissions, rated by Information Value, are used to obtain this accuracy.

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Weibull distribution analysis of wind power-generating potential on the southwest coast of Aceh, Indonesia

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AIP Conference Proceedings 2023年第1期2613卷

作者： Herdian Saputra Ira Devi Sara Suriadi Marwan M. Yanis 1Department of Electrical and Computer Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh Indonesia 2Department of Geophysical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh Indonesia

The National Energy Master Plan sets the target that by 2050 the development of renewable energy for Wind Energy Power Plants reaches 60.647 GW throughout Indonesia, while for Aceh Province, it is predicted that wind energy will be able to generate 894 MW. To map this energy potential, further research is still needed to get the best position for the development of Wind Power Plants. This study aims to map the potential of wind energy in the coastal areas of Southwestern Aceh using the Maximum Likelihood method of the Weibull distribution to analyze wind speed from the data provided by the European Center for Medium-Range Weather Forecast (ECMWF). The area of study covers several districts including Aceh Jaya, Aceh Barat, Nagan Raya, Aceh Barat Daya, Aceh Selatan, Aceh Singkil and Simeulue. The average wind on Weibull distribution for Simeulue is 2.48 m/s with a frequency of 26%, Aceh Singkil 1.54 m/s with a frequency of 40%, Aceh Selatan 1.55 m/s with a frequency of 48%, Aceh Barat Daya 1.55 m/s with a frequency of 50%, Nagan Raya 2 m/s with a frequency of 36%, Aceh Barat 1.54 m/s with a frequency of 38% and Aceh Jaya 2.49 m/s with a frequency of 31%. Meanwhile, the wind power capability ranges from 4,590 watts/m2 – 26,040 watts/m2, making the whole site a low-class wind suitability as a wind power generator.

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Crystallographic Study of Mixture CeBa1.8Pb0.2Cu3Oy in the Range of 860°C to 940 °C

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AIP Conference Proceedings 2007年第1期899卷 656-656页

作者： A. Stergiou S. Yilmaz C. Stergiou 1Department of Physics Laboratory of Applied Physics Aristotle University of Thessaloniki Greece 2Department of Electrical & Computer Engineering Aristotle University of Thessaloniki Greece

A powder mixture with chemical formula CeBa1.8Pb0.2Cu3Oy was prepared. The mixture was heated in free atmosphere, at temperatures 860°C to 940°C, for 24 to 72h. The samples were measured by X‐Ray powder diffraction with CuKa radiation. Each sample was characterized with the help of the PDF and refined, using the Rietveld’s “Powder Profile Analysis”. The first sample (860°C) was identified with the phases: Ba2CeBiO6, CuO and BaCuO2, while all the remaining samples (870°C–940°C) with the phases Ba2CePbO6, CuO and CeO2. The phases Ba2CeBiO6 and Ba2CePbO6 are the main phases with analogous chemical types, but different symmetry. The phase CuO is common in all the samples, while from the remaining phases the BaCuO2 appears only in the first sample and the CeO2 in all, except the first one. The quantity 0.2 of Pb is distributed in the Ba positions, substituting a part of these. The percentages of phases are about 82%, 10% and 8% for the first sample and for all the remaining about 85%, 8% and 7%, respectively with above serious.

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Algorithms for highway-speed acoustic impact-echo evaluation of concrete bridge decks

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AIP Conference Proceedings 2018年第1期1949卷

作者： Brian A. Mazzeo W. Spencer Guthrie 1Department of Electrical and Computer Engineering Brigham Young University Provo Utah USA 2Department of Civil and Environmental Engineering Brigham Young University Provo Utah USA

A new acoustic impact-echo testing device has been developed for detecting and mapping delaminations in concrete bridge decks at highway speeds. The apparatus produces nearly continuous acoustic excitation of concrete bridge decks through rolling mats of chains that are placed around six wheels mounted to a hinged trailer. The wheels approximately span the width of a traffic lane, and the ability to remotely lower and raise the apparatus using a winch system allows continuous data collection without stationary traffic control or exposure of personnel to traffic. Microphones near the wheels are used to record the acoustic response of the bridge deck during testing. In conjunction with the development of this new apparatus, advances in the algorithms required for data analysis were needed. This paper describes the general framework of the algorithms developed for converting differential global positioning system data and multi-channel audio data into maps that can be used in support of engineering decisions about bridge deck maintenance, rehabilitation, and replacement (MR&R). Acquisition of position and audio data is coordinated on a laptop computer through a custom graphical user interface. All of the streams of data are synchronized with the universal computer time so that audio data can be associated with interpolated position information through data post-processing. The audio segments are individually processed according to particular detection algorithms that can adapt to variations in microphone sensitivity or particular chain excitations. Features that are greater than a predetermined threshold, which is held constant throughout the analysis, are then subjected to further analysis and included in a map that shows the results of the testing. Maps of data collected on a bridge deck using the new acoustic impact-echo testing device at different speeds ranging from approximately 10 km/h to 55 km/h indicate that the collected data are reasonably repeatable. Use of

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Comparing of the effect of changing weather factors on FSO communication system performance using iterative improvement technique

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AIP Conference Proceedings 2023年第1期2591卷

作者： Alaa Thaer Lateef Hayder A. Naser Aqeel Kamil Kadhim 1Ministry of Science & Technology Baghdad Iraq 2Department of Computer Techniques Engineering Imam Al-Kadhum College Baghdad Iraq

The issue of providing a communications system, with large frequencies within the range, is one of the main challenges that are required to be provided to users of the free-space optical communications service. In this work, the factors affecting the quality of performance of a free communication system (10 Gbps) were investigated and studied. The obtained results of this system are compared with two wavelengths 1550 nm and 850 nm in terms of farthest data transmission distance, BER, factor of quality and chart of eye in different weather situations using an iterative optimization.

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Implementing statistical analysis in multi-channel acoustic impact-echo testing of concrete bridge decks: Determining thresholds for delamination detection

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AIP Conference Proceedings 2018年第1期1949卷

作者： Lorin Hendricks W. Spencer Guthrie Brian Mazzeo 1Department of Electrical and Computer Engineering Brigham Young University Provo Utah USA 2Department of Civil and Environmental Engineering Brigham Young University Provo Utah USA

An automated acoustic impact-echo testing device with seven channels has been developed for faster surveying of bridge decks. Due to potential variations in bridge deck overlay thickness, varying conditions between testing passes, and occasional imprecise equipment calibrations, a method that can account for variations in deck properties and testing conditions was necessary to correctly interpret the acoustic data. A new methodology involving statistical analyses was therefore developed. After acoustic impact-echo data are collected and analyzed, the results are normalized by the median for each channel, a Gaussian distribution is fit to the histogram of the data, and the Kullback-Leibler divergence test or Otsu’s method is then used to determine the optimum threshold for differentiating between intact and delaminated concrete. The new methodology was successfully applied to individual channels of previously unusable acoustic impact-echo data obtained from a three-lane interstate bridge deck surfaced with a polymer overlay, and the resulting delamination map compared very favorably with the results of a manual deck sounding survey.

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Playing games in computers without physical interaction using electroencephalography for differently abled

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AIP Conference Proceedings 2019年第1期2112卷

作者： B. Sreedevi P. Rayavel 1Department of Computer Science and Engineering Sri Sai Ram Institute of Technology Tamil nadu India 2Department of Computer Science and Engineering Sri Sai Ram Institute of Technology Tamil nadu India

Mind Controlled gaming for the Differently Abled aims to open up the arena of gaming entertainment to those that has special needs. The project is modelled in such a way that it facilitates playing games without the need for physical interaction with the game itself such as operating a keyboard. The project uses the capability of the human brain to facilitate this kind of physical interaction less gaming. It uses the principle of Electroencephalography, an electrophysiological observing technique to record electrical movement of the brain. We utilize noninvasive situation of electrodes along the scalp. EEG estimates voltage variances coming about because of ionic current inside the neurons of the brain which are then mapped to certain activities that can be performed within the games.

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Custom written sentiment analysis supported Twitter data

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AIP Conference Proceedings 2022年第1期2464卷

作者： M. Nithya M. Pachhaiammal Priya V. Lalitha S. Samundeswari 1Department of Computer Science and Engineering Sri Sairam Engineering College Chennai India 2Department of Computer Science and Engineering Sri Sairam Institute of Technology Chennai India 3Department of Computer Science and Engineering Sri Sairam Engineering College Chennai India 4)Department of Computer Science and Engineering Sri Sairam Engineering College Chennai India

This paper helps to make the created Twitter Data more understandable. It streams real-time tweets, or can fetch tweets from specific topics or keywords. It then analyses the data using a custom-written sentiment analysis algorithm, and eventually displays the results with a series of dynamic *** data visualizations. It has a wide range of uses, for analyzing the effectiveness so for marketing campaign, to compare two competing topics.

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Crystallographic Study of Mixtures La1+xBa2−xCu3Oy (x=0,0.2,0.4,0.6) after annealing at 860°C

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AIP Conference Proceedings 2007年第1期899卷 657-657页

Four powder mixtures with chemical formula La1+xBa2−xCu3Oy was prepared. The mixtures were heated in free atmosphere, at temperature 850°C for 60h and then at 860°C for 40h. XRD measurements were obtained with CuKa radiation. The samples were characterized with the help of the PDF and refined, using the Rietveld’s “Powder Profile Analysis”. Four phases, same for all the samples, were found: (La,Ba)2CuO4, BaCuO2, LaBa2Cu3O7−d, and BaCO3. The percentages of the tour phases are changed, as the x quantity increases, and varied from 38, 25, 18, 19%, for x=0, to 69, 14, 7, 10%, for x=0.6, respectively.

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