- Combining MATLAB #x00AE; simulation with telecommunications instructional modeling (TIMSTM) in a senior level communications course
- Hartnett, Richard J., Crilly, Paul B. | Frontiers in Education Conference (FIE), 2015. 32614 2015. IEEE (v.2015 / no.10 / pp.1-4 / 2015)
- In this work we present some of our successes in combining MATLAB #x00AE; -based simulation methods with Telecommunications Instructional Modeling (Emona-TIMS TM ) e
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In this work we present some of our successes in combining MATLAB #x00AE; -based simulation methods with Telecommunications Instructional Modeling (Emona-TIMS TM ) experimental methods to enhance student learning in a senior-level communications systems laboratory. While faculty have discussed the relative merits of simulation versus real experimentation in recent years, we find that combining these approaches has multiple advantages: (1) A TIMS TM based approach (where we have chosen to use #x201C;real-world #x201D; demodulated audio from local radio stations as the local message signal) makes students feel that they are engaged in #x201C;real-world modulation/demodulation; #x201D; (2) The TIMS TM based approach inherently reinforces a #x201C;concept map #x201D; (block diagram) view of communications modulation and demodulation; (3) The MATLAB #x00AE; simulation approach forces students to think about how to perform a proper simulation (e.g. set appropriate sampling rate, set appropriate specifications for digital filter design for envelope detector or discriminator, etc.) for both analog and digital simulation; and (4) The MATLAB #x00AE; simulation approach sets a starting point for our students as they pursue software defined radio (SDR) communications applications in some of their senior design projects. We find synergy in combining the two pedagogical approaches in most of the labs in our communications systems course, and this typically results in enhanced student comprehension. While more formal assessment will be conducted over the next two years, at this point we know from course feedback that students very much appreciate both learning tools. Students commonly remark that the TIMS TM really highlights the #x201C;big picture, #x201D; and helps them understand what to expect before they start the MATLAB #x00AE; simulations, while coding up the MATLAB #x00AE; simulations gets them #x201C;into the weeds, #x201D; and gives them the tools to test out ideas that support their senior projects.
- Simulation of a full-duplex microwave photonic filter
- Hernandez-Nava, P., Correa-Mena, A., Zaldivar-Huerta, I. E., Castanon-Avila, G., Garcia-Juarez, A., Leal-Cruz, A. L., Rodri #x0301, guez-Asomoza, J. | Electrical Engineering, Computing Science and Automatic Control (CCE), 2015 12th International Conference on (v.2015 / no.10 / pp.1-4 / 2015)
- A particular Full-Duplex microwave photonic filter is proposed and simulated. The main goal of this work is to demonstrate that filtering effect is formed in a bi-directi
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A particular Full-Duplex microwave photonic filter is proposed and simulated. The main goal of this work is to demonstrate that filtering effect is formed in a bi-directional way by using a single optical source. The series of simulations carried out allow establishing the optimal conditions for a practical implementation of this architecture in an optical communication system with a high degree of reliability.
- Numerical decomposition of symmetric linear systems
- Danielson, Claus, Bauer, Stefan | Decision and Control (CDC), 2015 IEEE 54th Annual Conference on (v.2015 / no.12 / pp.2061-2066 / 2015)
- This paper proposes a method for numerically decomposing symmetric linear systems. We define system symmetries as transformations of the inputs, outputs, and states that
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This paper proposes a method for numerically decomposing symmetric linear systems. We define system symmetries as transformations of the inputs, outputs, and states that do not change the system behavior. We show that symmetric systems can be decomposed into decoupled subsystems. We provide an algorithm for performing this decomposition that uses the input-output symmetries and minimal realizations to calculate the decomposition.
- Identification of authors of documents based on offline signature recognition
- Marusic, Tonco, Marusic, Zeljko, Seremet, Zeljko | Information and Communication Technology, Electronics and Microelectronics (MIPRO), 2015 38th International Convention on (v.2015 / no.5 / pp.1144-1149 / 2015)
- Handwritten signature is used in various applications on daily basis. Whether one signs a contract, work documents, petition, or wants to approve a check payment, one wil
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Handwritten signature is used in various applications on daily basis. Whether one signs a contract, work documents, petition, or wants to approve a check payment, one will use personal signature to do all those things. In this paper we use this daily based biometric characteristic for identification and classification of students' papers and various exam documents used at University of Mostar. In this paper we used OpenCV library as an image processing tool for feature extraction. As regards to classification method, we used Support Vector Machine.
- Analysis of Punjabi tonemes
- Singh, Amritpal, Pandey, Dipti, Agrawal, S. S. | Computing for Sustainable Global Development (INDIACom), 2015 2nd International Conference on (v.2015 / no.3 / pp.1694-1697 / 2015)
- The present paper describes the analysis of five Punjabi tonemes (tonal sounds), their variations when they occur in initial, medial and final positions of words spoken b
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The present paper describes the analysis of five Punjabi tonemes (tonal sounds), their variations when they occur in initial, medial and final positions of words spoken by native and non-native speakers. 1500 words are recorded by ten different speakers (5 male and 5 female). Out of these 1500, 150 words have been considered to analyze these tonemes in terms of acoustic parameters. Special attention is paid to the pitch movement (rise, fall or peak). The characteristic differences between the pitch movements have been observed. As the result of investigation, it can be said that the fall and rise in the pitch movements indicate change in pronunciation of tonemes as a result of their position of occurrence. The acoustic patterns of these tonemes spoken by the native speakers and the non-native speakers show significant difference.
- Restaurant Rating: Industrial Standard and Word-of-Mouth -- A Text Mining and Multi-dimensional Sentiment Analysis
- Qiwei Gan, Yang Yu | System Sciences (HICSS), 2015 48th Hawaii International Conference on (v.2015 / no.1 / pp.1332-1340 / 20151530-1605)
- AAA Restaurant Diamond Rating Guidelines (which is regarded as industry standards) rate a restaurant in three aspects: food, service, and de #x0301;cor/ambience. Drawing
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AAA Restaurant Diamond Rating Guidelines (which is regarded as industry standards) rate a restaurant in three aspects: food, service, and de #x0301;cor/ambience. Drawing upon extant literature, we argue that special contexts and pricing are two other major aspects in restaurant rating in addition to aforementioned three aspects. We tested our hypotheses based on our text mining and sentiment analysis of 268, 442 customer reviews of 7, 508 restaurants on Yelp.com, A form of digital word-of-mouth. Results from fitting a multilevel model showed that the sentiments about each of these five aspects alone explained about 28% of the explainable between-restaurant variances, and 12% of the explainable within-restaurant variances of the restaurants' star ratings. With other level and control variables, the multilevel model can explain more than 53% between-restaurant variances and 28% within-restaurant variances.
- Community and Social Feature-Based Multicast in Opportunistic Mobile Social Networks
- Shang, Charles, Wong, Britney, Xiao Chen, Wenzhong Li, Suho Oh | Computer Communication and Networks (ICCCN), 2015 24th International Conference on (v.2015 / no.8 / pp.1-8 / 2015)
- Opportunistic Mobile Social Networks (OMSNs), formed by people moving around carrying mobile devices such as smartphones, PDAs, and laptops, have become popular in recent
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Opportunistic Mobile Social Networks (OMSNs), formed by people moving around carrying mobile devices such as smartphones, PDAs, and laptops, have become popular in recent years. The OMSNs we discuss here are a special kind of delay tolerant networks (DTNs) that help enhance spontaneous interaction and communication among users that opportunistically encounter each other, without additional infrastructure support. Multicast is an important routing service in OMSNs which supports the dissemination of messages to a group of users. Most of the existing multicast algorithms are designed for general-purpose DTNs where social factors are neglected or reflected in static social features which are not updated to catch nodes' dynamic contact behavior. In this paper, we introduce the concept of dynamic social features and its enhancement to capture nodes' dynamic contact behavior, consider more social relationships among nodes, and adopt the community structure in the multicast compare-split scheme to select the best relay node for each destination in each hop to improve multicast efficiency. We propose two multicast algorithms based on these new features. The first community and social feature-based multicast algorithm is called Multi-CSDO which involves destination nodes only in community detection, and the second one is called Multi-CSDR which involves both the destination nodes and the relay candidates in community detection. The analysis of the algorithms is given and simulation results using a real trace of an OMSN show that our new algorithms outperform the existing one in terms of delivery rate, latency, and number of forwardings.
- Experiments on neural networks with different configurations for electroencephalography (EEG) signal pattern classifications in imagination of direction
- Wakamizu, So, Tomonaga, Kenta, Kobayashi, Jun | Control System, Computing and Engineering (ICCSCE), 2015 IEEE International Conference on (v.2015 / no.11 / pp.453-457 / 2015)
- Here we present experimental results of classification methods for brain activity in the imagination of direction. We used a wireless portable electroencephalography (EEG
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Here we present experimental results of classification methods for brain activity in the imagination of direction. We used a wireless portable electroencephalography (EEG) headset in our preceding study to collect EEG data from subjects in experiments, during which the subjects imagined arrows indicating one of the four directions: up, down, right, and left. The implemented classification methods consisted of a band-pass filter, fast Fourier transformation, principal component analysis, and neural network. We have applied neural networks with different configurations to the EEG data used in the preceding study in order to improve the classification rate. The experiments conducted in this study demonstrated some improvement results.
- Metrological characterization of an ultra-low noise acquisition system for fast voltage pulses measurements
- Arpaia, Pasquale, Baccigalupi, Carlo, Martino, Michele | Instrumentation and Measurement Technology Conference (I2MTC), 2015 IEEE International (v.2015 / no.5 / pp.1532-1536 / 2015)
- The metrological characterization of a custom designed ultra-low noise analogue front-end for an acquisition system for the measurement of flat-top of fast voltage pulses
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The metrological characterization of a custom designed ultra-low noise analogue front-end for an acquisition system for the measurement of flat-top of fast voltage pulses is presented. The system has challenging requirements, in particular for Common Mode Rejection Ratio (CMRR), thus custom methods have been defined, by illustrating the experimental results achieved at the European Organization for Nuclear Research (CERN) during the study of the new Compact LInear Collider (CLIC).
- Investigation of non-thermal atmospheric pressure plasma jet in contact with liquids-using ICCD camera
- Adress, Wameedh, Abe, Yusuki, Graham, Bill | Plasma Sciences (ICOPS), 2015 IEEE International Conference on (v.2015 / no.5 / pp.1-1 / 2015)
- Summary form only given. Non-thermal atmospheric pressure plasma jets APPjs are a promising new field of research which are beneficial to many associated technologies, su
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Summary form only given. Non-thermal atmospheric pressure plasma jets APPjs are a promising new field of research which are beneficial to many associated technologies, such as material treatment and biomedical applications [1],[2]. The use of non-thermal plasmas for the eradication and control of bacterial infection and contamination are acquired great attention in biomedical applications [3]. The effects of non-thermal plasma operating conditions on the bacterial inactivation rate have been investigated in many previous studies. In this study a kHz-driven APPj source of a structure similar to that designed by Teschke et al in 2005 [4], which has been studied recently by many research groups in different configurations [5]. The experimental setup simulates the activity of a APPj against biofilms of Bacillus cereus to investigate the influence of APPj. The method improves the understanding of the interaction mechanism between the plasma jet and the liquid biological samples.The plasma discharge is created inside a cylindrical quartz tube with inner and outer diameters 4mm, 6mm respectively and two electrodes is used to forming dielectric barrier discharge. A high voltage in kilovolt is used to ignite the plasma. A pure helium gas flows through the discharge tube at a 2 standard liters per minute and 0.5% oxygen impurities. This atmospheric pressure plasma jet is used to generate non-thermal plasma bullets away from the production region. The gas channel guides the bullets in the air space between the quartz tube and the liquid surface. In the measurements the plasma plume was allowed to interact with two different liquids, in different volumes (conductor and nonconductor). The interaction is with a dielectric container similar to the one used in the bacterial inactivation by the plasma jet. The distance between the end of the quartz tube and the liquid surface is 1.5 cm. Time-resolved images of the optical emission were measured using ICCD camera (iStar usb Andor Technology DH520) in nanoseconds time scale. The images were illustrated the evolution of the bullets in air-space and liquid surface. The spatio-temporally resolved images investigate the interaction dynamics between the plasma plume and the liquid surface.The emission intensity from only one cycle was captured and accumulated over several cycles to study the behaviour of the plume with different liquid surfaces. The absorption intensity of plasma was measured by the ICCD camera at different locations of the container. The plasma intensities and bullets velocity were measured directly. Primary results were shown that the bullets velocity depends strongly on the type and shape of the liquid surface. The images were proved that the plasma plume slightly spreads out into the liquid and absorbed inside the liquid without any penetration. The plasma remains in the liquid about 1 #x03BC;s before finally extinguishing, or dissipates into the liquid. The optical emission spectroscopy of the plasma plume on different surfaces was investigated.
- Community Influence Analysis Based on Social Network Structures
- Li, Yi, Wu, Xindong, Li, Lei | Smart City/SocialCom/SustainCom (SmartCity), 2015 IEEE International Conference on (v.2015 / no.12 / pp.247-254 / 2015)
- Modeling and measuring social influence is a major problem in Social Network Analysis. Existing models and methods could handle individual influence analysis conveniently
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Modeling and measuring social influence is a major problem in Social Network Analysis. Existing models and methods could handle individual influence analysis conveniently, but they rarely estimate the social influence of communities which are ubiquitous in social networks. Based on the structures of online social networks, a community oriented influence analysis model is proposed. Then, we provide an algorithm called CommRank for calculating the social influence of communities. Since the algorithm combines both internal structural information and external interaction data of communities, it estimates community influence more precisely on multiple datasets. Experimental results also demonstrate that, at the cost of a little gain loss, CommRank can dramatically improve the efficiency when dealing with the influence maximization problem.
- Health Capital Depreciation and Medical Care Demand: An Empirical Study of Taiwan's Senior Citizens
- Jwu Rong Lin, Ching-Yu Chen, Shuo-Chun Weng | Computer Software and Applications Conference (COMPSAC), 2015 IEEE 39th Annual (v.3 / pp.116-119 / 2015)
- This research aims at studying health capital depreciation of senior citizens and their corresponding medical care demand. Qualitative response models are constructed, fo
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This research aims at studying health capital depreciation of senior citizens and their corresponding medical care demand. Qualitative response models are constructed, followed by empirical studies. Data is collected from inpatients of Center for Geriatrics and Gerontology at Taichung Veterans General Hospital from 2008 to 2012. All test subjects are under comprehensive geriatric assessment to characterize levels of health capital depreciation. Medical care demand is defined by length of hospital stay.
- Data-driven SOH prediction for EV batteries
- Gae-won You, Sangdo Park, Sunjae Lee | Consumer Electronics (ICCE), 2015 IEEE International Conference on (v.2015 / no.1 / pp.577-578 / 2015)
- As electric vehicles (EVs) have been popularized, research on battery management system (BMS) of EVs' core technology has considerably drawn attention. Among various func
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As electric vehicles (EVs) have been popularized, research on battery management system (BMS) of EVs' core technology has considerably drawn attention. Among various functions of BMS, predicting state-of-health (SOH) that indexes batteries' aging is the most crucial to determine replacement time of the battery or to estimate driving mileage. This paper studies how to predict SOH in practical EV environments where the batteries are charged and discharged dynamically.
- Analysis of a CFAR correlation radiometer
- Saarnisaari, Harri | Military Communications and Information Systems (ICMCIS), 2015 International Conference on (v.2015 / no.5 / pp.1-5 / 2015)
- The two antenna correlation radiometer is used detecting unknown signals but its principle equals a single antenna detector where a signal is correlated by its delayed ve
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The two antenna correlation radiometer is used detecting unknown signals but its principle equals a single antenna detector where a signal is correlated by its delayed version. Its performance, its sensitivity to errors in noise power estimation as well as its constant false alarm rate (CFAR) form have been analyzed previously. Herein, an alternative analysis of the CFAR form is provided as well as simple to use formulae for setting the detection threshold and evaluating detection performance. The simulation results verify that the provided analytical results are more accurate than the previous results. Furthermore, it is shown that multipath propagation may increase the detection performance due to multipath diversity if the multipaths are separable.
- Multi-objective Quantum-Inspired Cultural Algorithm
- Yi-nan Guo, Pei Zhang | Soft Computing and Machine Intelligence (ISCMI), 2015 Second International Conference on (v.2015 / no.11 / pp.25-29 / 2015)
- It had been proved that the knowledge may promote more efficient evolution. Considering the knowledge defined in different form, we present multi-objective quantum-inspir
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It had been proved that the knowledge may promote more efficient evolution. Considering the knowledge defined in different form, we present multi-objective quantum-inspired cultural algorithms so as to effectively utilize the implicit information embodied in the evolution to promote more efficient search. The dual structure derived from cultural algorithm was adopted. In population space, the rectangle's height of each allele in quantum individuals was calculated in terms of non-dominated rank by sorting among individuals, instead of the relative fitness values. In belief space, the knowledge memorized the distribution and location about the non-dominated individuals' objective values in the objective space and directed the mutation and selection operations so as to influence the update of quantum individuals further. The statistical simulation results for five benchmark functions indicated that the proposed algorithm keeps the diversity of population better and obtains more uniform pareto-optimal solutions near the true pareto front.
- Simulation and analysis of an axial vircator using PIC code
- Maiti, Moitreyee, Tiwari, Deepak, Roy, Amitava, Singh, Navdeep, Wagh, Sushama | Electromagnetic Compatibility (APEMC), 2015 Asia-Pacific Symposium on (v.2015 / no.5 / pp.1-5 / 2015)
- An axial virtual cathode oscillator (vircator) designed for a high pulsed power system has been simulated and analyzed to generate high power microwaves (HPM) in a three
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An axial virtual cathode oscillator (vircator) designed for a high pulsed power system has been simulated and analyzed to generate high power microwaves (HPM) in a three dimensional Particle-In-Cell (PIC) simulation code. Magic, which is based on Finite Difference Time Domain (FDTD) and PIC techniques, is an electromagnetic specific code involving space charge interactions. The intense relativistic electron beam (IREB) used is typically of 200kV, 100ns. With increasing anode-cathode (AK) gap, direct proportionality of HPM output frequency and inverse proportionality of HPM output power with AK gap was established. The dependency of space charge limited current on the IREB voltage was proved by changing the IREB voltage levels and observing its effect on the space charge limited current. Using different metals for the anode mesh, it was observed that copper is ideally suited for the anode mesh of an axial vircator. As the cathode radius was varied, the Child-Langmuir current was observed to vary as the square of the radius of the emitter area which is the same as the cathode top radius.
- Effect of deposition time on structural, optical and morphological properties of facing-target sputtered TiO2 thin film
- Hossain, M. F., Paul, Puspita, Takahashi, T. | Electrical amp; Electronic Engineering (ICEEE), 2015 International Conference on (v.2015 / no.11 / pp.241-244 / 2015)
- The aim of this work is to deposit nanocrystalline TiO 2 films by DC reactive facing-target sputtering (FTS) technique. The TiO 2 films have been deposited in Fluorin
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The aim of this work is to deposit nanocrystalline TiO 2 films by DC reactive facing-target sputtering (FTS) technique. The TiO 2 films have been deposited in Fluorine doped tin-oxide (FTO) glass substrate by FTS with sputtering pressure of 2.0 Pa, and Ar/O 2 gas ratio of 7:3. The main attraction of this paper is to correlate the structural, optical and morphological properties of these prepared TiO 2 film with variation of deposition time (like 2, 4 and 12 hrs). The thickness of TiO 2 film increases with the increase of deposition time. The correlation between the thickness variance and the structural, optical and morphological properties of TiO 2 thin films has been investigated in details. From the results, it is cleared that the crystallinity, grain size and surface roughness enhance but cluster size reduces with the increase of deposition time. These prepared films have chanced to apply directly for dye-sensitized solar cell, photoelectrochemical cell and water splitting applications.
- Too old to learn? Specific needs of senior workplace learners
- Haertel, Tobias, Radtke, Monika, Terkowsky, Claudius, May, Dominik, Neubauer, Daniel, Dehler, Johanna | Interactive Collaborative Learning (ICL), 2015 International Conference on (v.2015 / no.9 / pp.132-136 / 2015)
- Due to Demographic change universities, vocational trainings, and advanced trainings are challenged to educate learners with diverse backgrounds such as age, country of o
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Due to Demographic change universities, vocational trainings, and advanced trainings are challenged to educate learners with diverse backgrounds such as age, country of origin and educational achievement. These groups of learners are supposed to have different, individual learning requirements. However, there is still only sparsely knowledge about their needs and how to take them into account in appropriate learning scenarios. Especially the aspects of senior learners aged 50 years and older are hardly explored. In this contribution, the results of a literature review and an expert workshop on the specific needs of senior learners are presented and discussed. Firstly, an overview on current age sensitive learning scenarios is given. These do all have the claim to be attached to the professional experiences, learning interests and needs of older employees. Secondly, the different approaches lead to main requirements for designing such learning scenarios in an ideal way. Thirdly, participants of an expert workshop representing different perspectives from science and practice agreed that with regard to demographic changes, educating senior workers will become an important issue for most companies. However, they expressed very diverse and sometimes contradicting opinions on how learning scenarios for senior workers should be designed. The workshop showed that it still has to be considerated, how far these findings about senior learners differ from #x201C;good #x201D; approaches of teaching and learning in general.
- Measuring the maturity of open source software
- Houaich, Youssef Ait, Belaissaoui, Mustapha | Information Systems and Economic Intelligence (SIIE), 2015 6th International Conference on (v.2015 / no.2 / pp.133-140 / 2015)
- There are a number of reasons that encourage the use of open source software `OSS' such as: cost savings, fast time-to-market and high-quality software[1]. Various organi
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There are a number of reasons that encourage the use of open source software `OSS' such as: cost savings, fast time-to-market and high-quality software[1]. Various organizations have considered the use of free software in their IT infrastructure for economic, security or other reasons. With a large number of free software available on the internet, choosing the best one has become a daunting task. In order to solve this problem, different methods have been proposed. In this paper, we propose a new method to 'measure the maturity of free software' which is relevant and easy to be adopted especially for small and medium enterprises. To evaluate our approach, we tested it in more than twenty companies in order to choose the best free software that will meet their real needs.
- A new implementation method of low stiffness for magnetic levitation gravity compensator
- Zhang, H., Kou, B., Jin, Y., Zhang, H. | Magnetics Conference (INTERMAG), 2015 IEEE (v.2015 / no.5 / pp.1-1 / 2015)
- Magnetic levitation is one of the solutions for high-precision positioning systems due to its non-contact characteristic. Magnetic bearings have the potential of replacin
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Magnetic levitation is one of the solutions for high-precision positioning systems due to its non-contact characteristic. Magnetic bearings have the potential of replacing the air bearings that are used in the semiconductor industry in which the vacuum environment is increasingly required. For the traditional z-actuators in the multi-DOF fine stage, a continuous power loss is inevitable because the z-actuators are required to support the moving mass. Therefore, the heat form the coils will cause the temperature rise and structural distortion, which both deteriorate the positioning accuracy. A good solution is to support the moving mass by passive magnetic force. However, the major difficulty in using passive magnetic force is the highly position-dependent characteristic. From the aspects of positioning accuracy and vibration isolation, the stiffness that are defined as the position dependency of the magnetic force should be kept as low as possible. To date, the main reasons of the stiffness error between theoretical analysis and experiment results are ascribed to assembling error and machining tolerance. However, it is not entirely true for the low-stiffness applications. In this paper, the essential reason causing the stiffness error is analyzed and a new method to realize low stiffness for passive magnetic levitation is proposed.