- Community-centric analysis of user engagement in Skype social network
- Rossetti, Giulio, Pappalardo, Luca, Kikas, Riivo, Pedreschi, Dino, Giannotti, Fosca, Dumas, Marlon | Advances in Social Networks Analysis and Mining (ASONAM), 2015 IEEE/ACM International Conference on (v.2015 / no.8 / pp.547-552 / 2015)
- Traditional approaches to user engagement analysis focus on individual users. In this paper we address user engagement analysis at the level of groups of users (social co
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Traditional approaches to user engagement analysis focus on individual users. In this paper we address user engagement analysis at the level of groups of users (social communities). From the entire Skype social network we extract communities by means of representative community detection methods each one providing node partitions having their own peculiarities. We then examine user engagement in the extracted communities putting into evidence clear relations between topological and geographic features of communities and their mean user engagement. In particular we show that user engagement can be to a great extent predicted from such features. Moreover, from the analysis it clearly emerges that the choice of community definition and granularity deeply affect the predictive performance.
- Experiments on classification of electroencephalography (EEG) signals in imagination of direction using a wireless portable EEG headset
- Tomonaga, Kenta, Wakamizu, Sou, Kobayashi, Jun | Control, Automation and Systems (ICCAS), 2015 15th International Conference on (v.2015 / no.10 / pp.1805-1810 / 20152093-7121)
- Here we present experimental results of classification methods for brain activity in the imagination of direction. In anticipation of its adequate performance, we used a
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Here we present experimental results of classification methods for brain activity in the imagination of direction. In anticipation of its adequate performance, we used a wireless portable electroencephalography (EEG) headset to collect EEG data from subjects in the experiments, during which the subjects imagined arrows indicating one of the four directions: up, down, right, and left. The classification methods estimated the direction that the subjects imagined on the basis of their brain wave signals measured by an electrode on the portable EEG headset. We implemented several classification methods, which basically followed those of a previous study that used a medical EEG device. The classification methods consisted of a band-pass filter, fast Fourier transformation, principal component analysis, and neural network. The experimental results showed that the neural network trained with the EEG data of all subjects achieved a 52.00% classification rate. When using the EEG data of each subject, the best classification rate was 55.00%. The results using the portable EEG headset were comparable with those of the previous study.
- Influence of an initial chemical state of cation impurities on their diffusion in ionic crystals
- Ghyngazov, S. A., Frangulyan, T. S., Chernyavskii, A. V. | Control and Communications (SIBCON), 2015 International Siberian Conference on (v.2015 / no.5 / pp.1-4 / 2015)
- Depth profiles of magnesium, fluorine and oxygen impurities was examined in the surface layers of alkali-halide crystals using method of secondary ion mass spectrometry.
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Depth profiles of magnesium, fluorine and oxygen impurities was examined in the surface layers of alkali-halide crystals using method of secondary ion mass spectrometry. Samples of potassium bromide, coated with a surface film of magnesium fluoride were subjected to isothermal diffusion annealing in air at various times. It is shown that the diffusion of O ions occurs from the ambient atmosphere besides the diffusion of Mg and F ions during annealing of KBr crystals. Accurate estimation of the diffusion coefficients of cationic impurity Mg requires taking into account the possible interaction of this impurity and oxygen. The effect of an intensive electron beam on diffusion of magnesium impurity in crystals of fluoride of lithium is studied.
- Simulation of flow past a wing inspired by flying snakes
- Saxena, Vertika, Ramakrishnananda, Balajee, Kumar, T. Rajesh Senthil | Advances in Computing, Communications and Informatics (ICACCI), 2015 International Conference on (v.2015 / no.8 / pp.720-725 / 2015)
- Wings of airplanes, ornithopters and micro-aerial vehicles were inspired by the wings of birds and insects. A flying snake found in South and South-East Asia converts its
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Wings of airplanes, ornithopters and micro-aerial vehicles were inspired by the wings of birds and insects. A flying snake found in South and South-East Asia converts its entire body into a morphing wing which aids it to glide very efficiently. The aerodynamics of this species of snake is not well understood. Two dimensional computational and experimental studies of the snake's rather unusual cross-section have been done in earlier works. A three dimensional simulation of the flow over a wing inspired by the snake's body geometry is solved in the current work using steady laminar assumptions. Solutions were obtained from an angle of attack of 0 to 55 degrees in steps of 5 degrees. Interesting features like wake interaction with downstream sections and complex vortex shapes come to light. At low angles of attack, transverse flows reduce the strength of the wake leaving the wing. Gentle stall characteristics with a high stall angle and almost linear increase in drag with angle of attack are noticed. Bending of streamlines indicative of high lift production are clearly visualized at the maximum lift condition.
- Identification discrete fractional order Hammerstein systems
- Ivanov, D. V. | Control and Communications (SIBCON), 2015 International Siberian Conference on (v.2015 / no.5 / pp.1-4 / 2015)
- New algorithm is proposed for identification single-input-single-output (SISO) discrete fractional order Hammerstein systems. The estimates are proved to be convergent to
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New algorithm is proposed for identification single-input-single-output (SISO) discrete fractional order Hammerstein systems. The estimates are proved to be convergent to the true values with probability one. The results of a simulated example indicate that the proposed algorithm provides good estimates.
- Decomposition of natural join based on domain-interval fragmented column indices
- Ivanova, Elena, Sokolinsky, Leonid | Information and Communication Technology, Electronics and Microelectronics (MIPRO), 2015 38th International Convention on (v.2015 / no.5 / pp.210-213 / 2015)
- The paper describes decomposition of natural join relational operator based on the column indices and domain-interval fragmentation. This decomposition admits parallel ex
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The paper describes decomposition of natural join relational operator based on the column indices and domain-interval fragmentation. This decomposition admits parallel executing the resource-intensive relational operators without data transfers. All column index fragments are stored in main memory in compressed form to conserve space. During the parallel execution of relational operators, compressed index fragments are loaded on different processor cores. These cores unpack fragments, perform relational operator and compress fragments of partial result, which is a set of keys. Partial results are merged in the resulting set of keys. DBMS use the resulting set of keys for building the resulting table. Described approach allows efficient parallel query processing for very large databases on modern computing cluster systems with many-core accelerators. A prototype of the DBMS coprocessor system was implemented using this technique. The results of computational experiments are presented. These results confirm the efficiency of proposed approach.
- Identification of line of sight by cross polarization characteristic
- Morita, Atsuki, Iwai, Hisato, Sasaoka, Hideichi | Antennas and Propagation (ISAP), 2015 International Symposium (v.2015 / no.11 / pp.1-4 / 2015)
- In this paper, we identified line of sight (LOS) by cross polarization discrimination (XPD). We analyzed the propagation characteristic by the Finite Difference Time Doma
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In this paper, we identified line of sight (LOS) by cross polarization discrimination (XPD). We analyzed the propagation characteristic by the Finite Difference Time Domain (FDTD) method, and statistically evaluated the performance of the LOS identification based on XPD. As a result of the evaluation, we found it is difficult to obtain sufficient identification performance only by XPD. Therefore, we developed a new identification method combining XPD and the received power. By using the method, we showed successful identification rate of about 80% could be obtained.
- A comparative range approach using the Real World Drive Cycles and the Battery Electric Vehicle
- Milligan, Ross, Muneer, Tariq, Smith, Ian | Transportation Electrification Conference (ITEC), 2015 IEEE International (v.2015 / no.8 / pp.1-5 / 2015)
- In the UK, a quarter of all CO2 emissions come from transport and 90% of this comes from road vehicles. According to the UK Government (a) at the end of 2013 there were 3
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In the UK, a quarter of all CO2 emissions come from transport and 90% of this comes from road vehicles. According to the UK Government (a) at the end of 2013 there were 35 million vehicles licensed for use on the roads of UK and during 2013, over 4300 new ultra-low emission vehicles (ULEV - vehicles with emissions of CO2 below 75 g/km, or fully electric) were registered for the first time, this is 25% up on 2012. This included over 3600 cars and vans eligible for UK government `plug-in grants' this statistic is nearly 50% more than in 2012. Renault Zoe and the Nissan Leaf were the most popular electric vehicles available to the European market. The purpose of this drive cycle research work is to give the BEV (Battery Electric Vehicle) user an indication of the realistic range that the vehicle can travel without encountering a depleted battery and resulting in vehicle electrical system failure. This is the greatest concern to the user of this technology. In the present work it has been found that the predicted residual mileage (available range) of BEVs can be up to 22% short of what the battery can deliver. There are many mitigating factors and algorithms that are combined to give the driver of the battery electric vehicle an indication of the `distance to empty' as displayed on the car dashboard and this paper will compare the NEDC (New European Driving Cycle) with the dashboard estimation and the Real World Drive Cycle for a range of different routes and drive conditions. If the vehicle is driven in extreme winter conditions then the range could more realistically be reduced by 50% for an average suburban trip when compared with the NEDC figures. This study will address the `range anxiety' discussion that is often voiced when offering the BEV as an alternative to the conventional fuel vehicle [1].
- Provably good max-min-m-neighbor-TSP-based subfield scheduling for electron-beam photomask fabrication
- Lin, Zhi-Wen, Fang, Shao-Yun, Chang, Yao-Wen, Rao, Wei-Cheng, Kuan, Chieh-Hsiung | Computer-Aided Design (ICCAD), 2015 IEEE/ACM International Conference on (v.2015 / no.11 / pp.388-395 / 2015)
- Electron beam lithography (EBL) has been used for high-resolution photomask fabrication; its successive heating process in a certain region, however, may cause critical d
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Electron beam lithography (EBL) has been used for high-resolution photomask fabrication; its successive heating process in a certain region, however, may cause critical dimension (CD) distortion. As a result, subfield scheduling which reorders a sequence of subfields in the writing process is desirable to avoid the heating problem and thus CD distortion. To consider longer-range heat dissipation, this paper models a subfield scheduling problem with blocked region consideration as a constrained max-min m-neighbor travelling salesman problem (called constrained m-nTSP). To solve the constrained m-nTSP which is NP-complete in general, we decompose a constrained m-nTSP into subproblems conforming to a special case with points on two parallel lines, solve each of them with a provably good linear-time approximation algorithm, and merge them into a complete scheduling solution. In particular, our algorithm can also minimize the distances between successive subfields to alleviate the throughput degradation of EBL writing due to moving a writing head, while minimizing the heating problem. Average reductions of 10% in the maximum temperature and 14% in the distances between successive subfields over the state-of-the-art work can be achieved.
- The Application of Project Agent Construction System Based on the Economic Housing Construction
- Xiong Lili, Hu Ni | Measuring Technology and Mechatronics Automation (ICMTMA), 2015 Seventh International Conference on (v.2015 / no.6 / pp.1134-1137 / 2015)
- This article analyzes and discusses the features and process of project agent as well as qualifications and conditions of construction agents in the field of economic and
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This article analyzes and discusses the features and process of project agent as well as qualifications and conditions of construction agents in the field of economic and applicable housing construction. It also provides relevant advises and suggestions to improve the project agent system, which is beneficial and adds stronger practical meaning in this field.
- Identification and counting of pests using extended region grow algorithm
- Martin, A., Sathish, D., Balachander, C., Hariprasath, T., Krishnamoorthi, G. | Electronics and Communication Systems (ICECS), 2015 2nd International Conference on (v.2015 / no.2 / pp.1229-1234 / 2015)
- Agriculture plays most important role in the Indian economy. The agriculture sector of India has covered about 43percent of India's land area. Digital image processing is
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Agriculture plays most important role in the Indian economy. The agriculture sector of India has covered about 43percent of India's land area. Digital image processing is the use of computer algorithms like histogram, segmentation, edge detection, fuzzy approach, region based growing and tracking to perform analysis on digital images. In the existing system it is seen that there is a requirement for manual detection and extraction of pest in agricultural field which is not more efficient and accurate. In the proposed work, an integrated pest management using image processing algorithm using extended region based growing to identify the pest and have the counting of the pest to predict the pesticide amount to be used. This extended region grow algorithm provides best identification and counting of the pest.
- Advanced detection method for polymer residues on semiconductor substrates: 3D/TSV/interposer: Through silicon via and packaging
- Richter, H., Pfitzner, L., Pfeffer, M., Bauer, A., Siegert, J., Bodner, T. | SEMI Advanced Semiconductor Manufacturing Conference (ASMC), 2016 27th Annual (v.2016 / no.5 / pp.472-474 / 2016)
- A novel inspection technology for detection of thin polymer layers, deposited on structured silicon wafer surfaces, has been developed. The labeling of polymer residues w
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A novel inspection technology for detection of thin polymer layers, deposited on structured silicon wafer surfaces, has been developed. The labeling of polymer residues with fluorophore combined with the subsequent examination under a fluorescence microscope enables a non-destructive detection of amorphous and semi-crystalline polymers and polymer residues on wafer substrates.
- Community-Based M2M Framework Using Smart/HetNet Gateways for Internet of Things
- Lin, Yi-Lan, Chung, Wu-Chun, Hsu, Cheng-Hsin, Chung, Yeh-Ching | Data Science and Data Intensive Systems (DSDIS), 2015 IEEE International Conference on (v.2015 / no.12 / pp.688-695 / 2015)
- In order to manage the Internet of things in a flexible and efficient way, this paper proposes a novel M2M framework using smart/HetNet gateways. Our approach is not only
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In order to manage the Internet of things in a flexible and efficient way, this paper proposes a novel M2M framework using smart/HetNet gateways. Our approach is not only compatible to the M2M standard, but also enables the community-based coordination among gateways and devices. With smart and HetNet gateways, various types of requirements and applications can be fulfilled and handled at a local region. Accordingly, unnecessary network usage is avoided so as to reduce the traffic loads in mobile networks. We also implement a prototype to sustain an application scenario of IoT. In our prototype, the lamp is automatically switched on when a human face is detected. The demonstration shows that our system is practical and supports the subscription and notification in a community. Finally, experimental results reveal that some basic procedures can benefit from the shorter time and less uplink traffic if devices involved in an application are within the same region.
- Beijing cultural and creative industry policy effect evaluation based on fuzzy comprehensive evaluation
- Chao Lu, Sijing Liu | Logistics, Informatics and Service Sciences (LISS), 2015 International Conference on (v.2015 / no.7 / pp.1-6 / 2015)
- This paper constructs the policy effect evaluation system for Beijing cultural and creative industry, using entropy method to determine the weight and the fuzzy comprehen
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This paper constructs the policy effect evaluation system for Beijing cultural and creative industry, using entropy method to determine the weight and the fuzzy comprehensive evaluation method to analyze effect, and then put forward the suggestions. The results show that the policy of Beijing cultural and creative industry have played itself role, and whose implementation effect is well. But, from the view of rule of industrial development, the ideal of establishing policy of Beijing cultural and creative industry should be adjusted, and realize that through legislation the market is playing a decisive role in allocating resources.
- Identification of systems using binary sensors via Support Vector Machines
- Goudjil, Abdelhak, Pouliquen, Mathieu, Pigeon, Eric, Gehan, Olivier, M'Saad, Mohammed | Decision and Control (CDC), 2015 IEEE 54th Annual Conference on (v.2015 / no.12 / pp.3385-3390 / 2015)
- In this paper, we consider the identification of systems based on binary measurements of the output. The linear part of the system is parameterized by a Finite Impulse Re
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In this paper, we consider the identification of systems based on binary measurements of the output. The linear part of the system is parameterized by a Finite Impulse Response filter and the binary sensor is parameterized by a threshold. The idea is to formulate the identification problem as a classification problem. This formulation allows the use of supervised learning algorithm such as Support Vector Machines (SVM). Simulation examples are given to illustrate the performance of the presented method.
- Microwave treatment of agricultural soil samples
- Cicatelli, A., Guarino, F., Castiglione, S., Grimaldi, M., Di Luca, A., Esposito, D., Bisceglia, B. | Microwave Symposium (MMS), 2015 IEEE 15th Mediterranean (v.2015 / no.11 / pp.1-3 / 2015)
- Samples of agricultural soil, sown with Eruca sativa Mill. or Portulaca oleracea L., underwent to different microwave (MW) treatments in reverberating chamber (Incident P
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Samples of agricultural soil, sown with Eruca sativa Mill. or Portulaca oleracea L., underwent to different microwave (MW) treatments in reverberating chamber (Incident Power = 600 W), varying in the exposure time. Brief treatment with MWs caused a decrease of P. oleracea seed germination up to 30-50 %, relative to controls, whilst seeds of E. sativa, underwent to the same MW treatments (Incident Power 100 W, T1 = 1 min, T2= 30 sec and T3 = 2 min), did not influence seed germination. However, the T2 MW treatment strongly inhibited seed germination. The MW exposition clearly influences germination of the assayed seeds, consequently this methodology might be particularly effective in weed and pest control of agricultural soils.
- Managing cultural heritage: Digital documentation and archiving
- Bartolomei, Cristiana, Ippolito, Alfonso | Digital Heritage, 2015 (v.2 / pp.259-266 / 2015)
- Presented in the study is an analysis of methodologies for digital representing, documenting and popularizing cultural heritage through digital archives. The development
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Presented in the study is an analysis of methodologies for digital representing, documenting and popularizing cultural heritage through digital archives. The development and perfecting of techniques for acquiring and elaborating photorealistic 3D models, made them pivotal elements for popularizing information of objects on the scale of architectonic structures. The experiment conducted on the Gates of Bologna aims at presenting the continuity of work starting with the acquisition and elaboration of 3D models created with the help of expeditious methodologies, then comparing various systems to finally achieve a systematization of heterogeneous data within a digital platform, bringing out its potentialities and limits. The objective is to present the way in which digital technologies allow us to document, preserve, evaluate and popularize cultural heritage by structuring out an #x201C;open #x201D; system of cognition and therefore always lending itself to implementation.
- Simulation model of supermarket queuing system
- Xing Wenjie, Li Senbiao, He Lihong | Control Conference (CCC), 2015 34th Chinese (v.2015 / no.7 / pp.8819-8823 / 2015)
- Based on the M/M/1 queuing model and the numbers of goods purchased by each customer, this paper persents a simulation model of supermarket queuing system. We compared tw
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Based on the M/M/1 queuing model and the numbers of goods purchased by each customer, this paper persents a simulation model of supermarket queuing system. We compared two queuing systems under different numbers of goods, one is single-queuing system, the other one is double-queuing system. Then, the optimal cut-off number of goods is developed according to the analysis of economic cost and the optimal casher numbers in both queuing systems. The simulation results show that the double-queuing system further shortens the staying time of customers, significantly reduces the operating cost and improves the operational efficiency of the supermarket.
- Community based sensing: A test bed for environment air quality monitoring using smartphone paired sensors
- Jafari, Hossein, Xiangfang Li, Lijun Qian, Yuanzhu Chen | Sarnoff Symposium, 2015 36th IEEE (v.2015 / no.9 / pp.12-17 / 2015)
- Awareness of our surrounding environment is very important. Traditional stationary air quality and pollution monitoring systems which installed in dedicated locations are
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Awareness of our surrounding environment is very important. Traditional stationary air quality and pollution monitoring systems which installed in dedicated locations are usually bulky and expensive, and they may not be able to measure at locations of our interest. In this study, we propose a novel framework of an environment air quality monitoring system using a community-based approach. Leveraging on the high penetration of smartphones and low cost and small form factor of certain sensors that can be carried on a key chain with a Bluetooth module, critical measurements such as air quality can be measured by each sensor carried by a member of a community, and be sent to that person's smartphones, and eventually uploaded to a web portal using a corresponding app. Then the aggregated and processed data at the server side can be visualized and shared among the community members and publish through social networks. In this project, we have designed the architecture of the proposed community sensing system, and implemented the system using commercial off-the-shelf (COTS) Sensordrone paired with Android #x00A9; smartphones. Our system measure temperature, humidity, pressure, carbon monoxide, and battery charge level in real-time and it will provide location based services to users. Extra sensors such as ozone and radiation sensors can be added as well.
- Optimisation and memristive response of sol-gel derived TiO2 thin films
- Prusakova, Valentina, Dire, Sandra, Collini, Cristian, Pasquardini, Laura, Vanzetti, Lia, Resta, Giuseppe, Pederzolli, Cecilia, Lorenzelli, Leandro | AISEM Annual Conference, 2015 XVIII (v.2015 / no.2 / pp.1-4 / 2015)
- Herein, we developed a series of Pt/TiO 2 /Pt/Ti/SiO 2 resistive switching materials with a variation in chemical composition of TiO 2 in an attempt to evaluate the
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Herein, we developed a series of Pt/TiO 2 /Pt/Ti/SiO 2 resistive switching materials with a variation in chemical composition of TiO 2 in an attempt to evaluate the parameters affecting the memristive switching behavior and, therefore, to optimize and control it. Different chemical compositions of TiO 2 were obtained by annealing the films at 400 #x00B0;C for 1 hour in diverse atmospheric conditions, such as air, vacuum and oxygen environments. The elemental composition of the produced samples was analyzed by X-ray photoelectron spectroscopy (XPS), revealing the different stoichiometric ratio of Ti/O and doping/contamination with silicon, carbon, and nitrogen depending on the annealing conditions. The preliminary I-V curves were acquired with Pt dish or wire, serving as a top electrode. The results showed a superior stability, durability and reproducibility of the resistive switch behavior observed in the samples containing oxidized silicon impurities. In addition to the electrical studies, the evolution of Pt dish top electrode was monitored by optical microscopy and scanning electron microscopy (SEM), revealing mechanical and electrochemical damage of the electrode during the electroforming step.