Applied information technology Research Papers (original) (raw)

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- Applied information technology, Edges

Projects in the construction industry involve multidisciplinary collaboration between the disciplines of architecture, engineering, and construction (AEC), and others. Conventionally, the collaboration between these disciplines relied on the recurrent exchange of relevant drawings and documents. Building information modeling (BIM) as a model-based process has given AEC professionals the tools to more efficiently plan, design, construct, and manage buildings and infrastructure. Yet the AEC industry has been reluctant in fully adopting the BIM as a single standard. This study explores and identifies the bottlenecks in adopting BIM as a single product lifecycle standard in the construction industry and advise on educating new engineers to become the generation to use a virtual collaborative working space covering the entire building lifecycle. Two conducted surveys targeting the AEC academia and industry revealed the needs for multilevel cross-disciplinary interactive collaborative BIM process modeling, and skilled workforce to increase the graduates’ marketability and BIM adaptability. It is concluded that the new age collaborative culture requires new generation of AEC players that are enabled to work on a shared virtual product model supported by proactive BIM skills learned through undergraduate programs.

- by Ersin ElbaŞi
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- Applied information technology

The autism spectrum disorder (ASD) is increasingly being recognized as a major public health issue which affects approximately 0.5-0.6% of the population. Promoting the general awareness of the disorder, increasing the engagement with the affected individuals and their carers, and understanding the success of penetration of the current clinical recommendations in the target communities, is crucial in driving research as well as policy. The aim of the present work is to investigate if Twitter, as a highly popular platform for information exchange, can be used as a data-mining source which could aid in the aforementioned challenges. Specifically, using a large data set of harvested tweets, we present a series of experiments which examine a range of linguistic and semantic aspects of messages posted by individuals interested in ASD. Our findings, the first of their nature in the published scientific literature, strongly motivate additional research on this topic and present a methodological basis for further work.

- by Ognjen Arandjelovic
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- Sociology, Psychology, Social Psychology, Developmental Psychology
- by Gul Muhammad Khan
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- Robotics, Computer Science, Artificial Intelligence, Computer Engineering
- by Nicholas Syred
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- Applied information technology, High Speed Photography
- by Pavel Lafata
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- Optimization, Applied information technology, Splitter
- by Lukas Malina
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- Applied information technology
- by William Nyakundi
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- Genetics, Microbiology, Veterinary Medicine, Technology
- by Igor Litvinchev
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- Applied information technology

A cost-effective technique for on-line wear monitoring of a milling tool is presented. The tool wear is estimated directly from a fiber optic sensor with high resolution and high bandwidth characteristics. This sensor provides a distance measurement between its probe and the tool profile. The contribution of this work is the application of this sensor to sense on-line wear of a milling tool. Since the light emitted by this sensor comes from a photodiode, it does not produce eye damage, this is safer than laser displacement sensors. This technique senses the tool wear in real time, while the tool is rotating, with an accuracy less than 1 micron. Experimental results are also presented for a four-flank cutting tool rotating at 300 rpm.

- by Salvador Sandoval
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- Physics, Fiber Optic Sensors, Group work, Fiber optic sensor
- by Adolfo Guzman Arenas
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- Applied information technology, Applied technology
- by Aiman H. El-Maleh
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- Combinatorial Optimization, VLSI, Assignment, Applied information technology

Due to limited energy of sensor nodes in a wireless sensor network, an energy-efficient routing protocol with static clustering and dynamic structure (ERP-SCDS) is proposed in this paper. Utilizing virtual points in a corona-based wireless sensor network, static clusters with dynamic structures are formed in ERP-SCDS. Moreover, next-round cluster heads are selected in advance to avoid a deadlock when the old cluster heads die. Finally, a simple relay node selection mechanism instead of a complicated multi-hop route discovery algorithm is further designed for ERP-SCDS. Integrating these mechanisms enables ERP-SCDS to form balanced cluster sizes to prolong the network lifetime. Via simulations, we demonstrate that ERP-SCDS significantly outperforms LEACH, HEED, and Hausdorff previously proposed in the literature.

- by Arief Kurniawan
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- Statistical Analysis, Data Compression, Routing, Wireless Sensor Networks

The present work describes the development of a photoacoustic flowmeter with probe-beam deflection. A pulsed laser beam produces an acoustic pulse, whose propagation is registered by its deflection effects on two cw probe beams. The acoustic propagations, along and against the flow, are monitored by two cw probe beams. In the interaction, the probe beam undergoes a transient deflection that is detected by a fast response photodiode. The velocity distribution data profile of a square pipe is obtained by means of the acoustic pulse arrival time measured through its cross section applying the cylindrical shockwave model deveolped by Vlasses. The profiles determined with this experimental technique are compared with two turbulent pipe flow models.

- by Margarita Navarrete
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- Applied information technology

Classification of coins is an important but laborious aspect of numismatics - the field that studies coins and currency. It is particularly challenging in the case of ancient coins. Due to the way they were manufactured, as well as wear from use and exposure to chemicals in the soil, the same ancient coin type can exhibit great variability in appearance. We demonstrate that geometry-free models of appearance do not perform better than chance on this task and that only a small improvement is gained by previously proposed models of combined appearance and geometry. Thus, our first major contribution is a new type of feature which is efficient in terms of computational time and storage requirements, and which effectively captures geometric configurations between descriptors corresponding to local features. Our second contribution is a description of a fully automatic system based on the proposed features, which robustly localizes, segments out and classifies coins from cluttered images. We also describe a large database of ancient coins that we collected and which will be made publicly available. Finally, we report the results of empirical comparison of different coin matching techniques. The features proposed in this paper are found to greatly outperform existing methods.

- by Ognjen Arandjelovic
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- Engineering, History, Computer Science, Software Engineering

The concept of virtual cellular manufacturing system (VCMS) is finding acceptance among researchers as an extension to group technology. In fact, in order to realize benefits of cellular manufacturing system in the functional layout, the VCMS creates provisional groups of resources (machines, parts and workers) in the production planning and control system. This paper develops a mathematical model to design the VCMS under a dynamic environment with a more integrated approach where production planning, system reconfiguration and workforce requirements decisions are incorporated. The advantages of the proposed model are as follows: considering the operations sequence, alternative process plans for part types, machine timecapacity, worker timecapacity, crosstraining, lot splitting, maximal cell size, balanced workload for cells and workers. An efficient linear programming embedded particle swarm optimization algorithm is used to solve the proposed model. The algorithm searches over ...

- by Seyed Sadjadi
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- Applied, Applied information technology
- by J.C. GARCIA-PRADA and +1
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- Applied information technology

This paper presents a wireless communication protocol based on the Earliest Deadline First policy for wireless body sensor networks. This work advances a previous effort by proposing using an implicit Earliest Deadline First policy to guarantee real-time communication by optimizing network traffic flow, although this strategy may imply using the totality of bandwidth resources. The proposed protocol uses a slotted time-triggered medium access transmission control that is collision-free, even in the presence of hidden nodes. The protocol has been analytically modeled using Colored Petri Networks and Simulated in OPNET.

- by Miguel Garcia
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- Computer Science, Applied, Applied information technology, Wireless Ad hoc Networks
- by Guillermo Castillo
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- Group work, Fiber optic sensor, Tool wear, Applied information technology
- by Judith Zubieta
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- Applied information technology

- by Miguel Familia Garcia
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- Computer Science, Computer Network, Wireless Network, Applied
- by Lorena Bearzotti and +1
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- Multi Agent System, Applied information technology, Distributed Control System (DCS), Applied technology
- by Mudassar Raza
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- Face, Applied information technology, Pixels
- by Mudassar Raza
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- Face Recognition, Applied information technology
- by Ernesto Bribiesca
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- Applied information technology
- by Wael Wahab
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- Microstrip Antennas, Electromagnetics, Si, Applied information technology

- by Ade Kurniawan
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- Statistical Analysis, Data Compression, Routing, Wireless Sensor Networks
- by Jordi Forné and +1
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- Network Security, Cryptanalysis, Smart Cards, Applied information technology
- by Francisco Rico-Novella and +1
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- Network Security, Cryptanalysis, Smart Cards, Applied information technology
- by Haret Rosu
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- Applied information technology
- by Javier Van Cauwelaert and +1
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- High Voltage, Applied, Applied information technology, Shock Wave

The design of a beamforming network (BFN) for a multibeamsteerable antenna array using Coherently Radiating Periodic Structures (CORPS) is presented. In this design, the input ports of the feeding network are optimized using the particle swarm optimization (PSO) algorithm. A twobeam design configuration of CORPSBFN for a multibeamsteerable linear array is proposed and analyzed. The results shown in this paper present certain interesting characteristics in the array factor response, in terms of sidelobe level (SLL) and directivity (D), for the scannable multibeam linear array and the feeding network simplification for the design of BFN based on CORPS.

- by Armando Arce and +1
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- Applied information technology
- by Roberto Zenit
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- Applied information technology
- by Kiriakos Siderakis and +2
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- Applied information technology

Physical aging of semicrystalline polyethylene terephthalate was studied using differential scanning calorimetry(DSC). PET samples with crystallinity content of 0.28 were aged at two different temperatures, 25 and 45°C. Thesamples were stored for several days and periodically tested using DSC method. The glass transition temperature forthe samples aged at 25°C was about 73-74°C, and the position and intensity of endothermic peaks wereapproximately constant. Higher glass transition of the samples aged at 45°C, 73-86°C, was attributed to the enthalpyrelaxation process of amorphous regions of semicrystalline PET. For the samples aged at 45°C, the endothermicpeaks shifted to higher temperatures with increasing aging time. The position of the endothermic peaks determined bythe temperature of the maximum, Tmax, tended to increase with aging time for samples aged at 45°C, and theintensity of the peaks continuously increased with time; however, the results showed that the aging of PET sampl...

- by Zahra Emam-Djomeh
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- Applied information technology, Applied technology

Geometrical perturbations by using single and coaxial impellers configurations have been investigated in the laminar regime (Re = 2.68) in unbaffled stirred vessels. Combinations of one and two coaxial radial discharge flow impellers under centered and eccentric conditions were studied with viscous Newtonian fluid. The study of geometrical perturbations has been made in terms of the mixing times, energy consumption and the flow fields. Homogenization degrees and mixing times, determined with a color-discoloration technique, were evaluated by means of image processing. The flow fields were investigated using the particle image velocimetry technique. The use of off-centered impellers increases the pumping capacity; however, little effect of eccentricity was obtained when using two coaxial impellers under off-centered conditions obtaining the best results with a novel configuration consisting of a dual turbine with connecting plates.

- by Gabriel Ascanio
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- Applied information technology, Applied technology

ABSTRACT In this article we address a districting problem faced by a pickup and delivery parcel company over a determined service region. The service region is divided into districts, each served by a single vehicle that departs from a central depot. Two objectives are optimized: compactness and balance of the workload content among the districts. We present a mathematical formulation of the problem and a heuristic algorithm to solve the problem. Numerical results are presented in comparison to CPLEX 11.1 solutions for the smaller size instances. The results show that the heuristic performs well. The algorithm is able to solve moderate size instances in reasonable computational time, given the strategic nature of the problem.

- by Pablo A. Miranda
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- Applied information technology, Applied technology

- by Robbi Kurniawan
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- Statistical Analysis, Data Compression, Routing, Wireless Sensor Networks

- by arief kurniawan
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- Distributed Computing, Statistical Analysis, Data Compression, Routing
- by Miguel Mata
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- Applied information technology

In this paper we present the development and implementation of a switchedquadrature optical Costas loop receiver and its performance evaluation by means of simulations and with the experimental work of an optical set up and electronic circuitry. We report as well the implementation of some of the basic building blocks that are required by both homodyne and heterodyne receivers for coherent optical communication systems (guided and unguided, i.e., optical fiber and free space optics): we present an automatic wavelength controller (AWC), an electronicallydriven state of polarization controller (ASOPC) as well as an optical phase locked loop (OPLL) for phase tracking.

- by Arturo Arvizu
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- Applied information technology
- by Elena Guzzon
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- Applied information technology, Hypothesis testing, Rake receiver