Miracle-dz/UniFAR-FTUs huggingface dataset:
Adaptive antenna arrays for mobile satellite communications

The problem of increasing the number of users in FDMA mobile satellite communication systems is addressed. An antenna array is used to estimate the AOA of the desired and cochannel mobile users then the same array is used to allocate the maximum of the pattern to desired users while cochannel interference is nulled. This paper describes the use of the MUSIC algorithm for DOA estimation. Pattern nulls are obtained using the Wiener solution for the optimum array weights. It is shown that this approach allows closer proximity of the mobile users with same frequency thus increasing the channel capacity.
The delay vernier pattern generation technique

The authors describe a new technique for generating an arbitrary digital data stream with very fine timing resolution. Note that this timing resolution specifies the output edge placement precision, not the bit rate. The resolution is determined by the difference between two propagation delays rather than by an absolute delay. Because this difference can be made very small, the circuit, called the delay vernier generator, can achieve unprecedented timing resolution in a particular circuit technology. Also, this very precise timing is obtained without requiring an extremely high speed clock. The generator architecture includes delay-locked loop calibration mechanisms to compensate for process and temperature variations. A prototype chip was fabricated in a 1.2-/spl mu/m CMOS technology, and measurements confirmed that resolutions as fine as 100 ps can be achieved reliably.
Feature extraction with time series models: application to lung sounds

A new method for the extraction of features from stationary stochastic processes has been applied to a medical detection problem. It is an illustration of new possibilities with automatic time series modeling. Firstly, the model type and the model order for time series prototype models are selected. The two prototypes represent the lung noises of a single healthy subject, before and after the application of methacholine. Using the model error ME as a measure for the difference between time series models, new observations can be divided into classes that belong to the prototype models for this person. The prototype models are obtained from a few expiration cycles under known conditions. This is sufficient to detect the presence of methacholine in new data of the same subject. It is not necessary to use the same model type and order for prototype and new data. Automatically and individually selected models for prototypes and data give a good detection of metacholine.
A Perturbation Theory for Friction of a Large Particle Immersed in a Binary Solvent (Proceedings of the 5th Mini-Symposium on Liquids : Fundamental Problems on Liquids and Related Topics)

A new theory of a binary solvent is developed to study the effects of the density of solvent particles around a large solute particle on friction. To develop the theory, the solvent particles are assumed to be much smaller than the solute particle, and then a perturbation expansion is employed. The expansion allows one to derive hydrodynamic equations with boundary conditions on the surface of a solute. The boundary conditions are calculated from the radial distribution functions of a binary solvent. The hydrodynamic equations with the boundary conditions provide an analytical expression for the friction. The developed theory is applied to a binary hard-sphere system. The present theory shows that the friction in the system has larger values than those predicted by the Stokes law.
Novel real-time harmonic minimized PWM control for drives and static power converters

It is shown how a recently developed harmonic minimized PWM control strategy, based on regular-sampling PWM techniques, can be used to significantly reduce the computational requirements for real-time microprocessor-based PWM implementation. This results in greatly simplified and more efficient microprocessor software/hardware requirements, leading to real-time PWM generation with minimized harmonics, suitable for all power electronic PWM control applications. <<ETX>>
A Research Publishing Checklist for New Authors

While traditionally information systems (IS) students graduated then published, today they often publish before they graduate. While publishing seems yet another student burden, it can be a useful learning experience, raise motivation, provide helpful feedback, help grant and job applications, and give student and advisor a common focus. That research publishing is an extra demand suggests the need for a support tool. The research publishing checklist: 1. Chunks knowledge into elements for easier handling. 2. Grounds elements with practical examples and summary statements, and 3. Structures the elements in academic format for easy location. It can be used not only in student advising, but for new authors in any context, whether conference, journal or book chapter. The checklist is available at http://brianwhitworth.com/researchchecklist.pdf
E-learning by experience: how CBR can help

The integration of e-learning platforms with Case-Based Reasoning (CBR) leads to distance learning systems where real occurrences are available to illustrate theory with practice. However, CBR systems may be completely different from each other due to their architecture, development platform, case description, etc. So, a way of querying and integrating different case sources is required. Besides that, examples must match theoretical topics, student profile and, if possible, be susceptible of observation in virtual reality environments. The paper describes some aspects of these problems and presents the general architecture of MKM - Maintenance Knowledge Manager - an e-learning and CBR based system devoted to the maintenance field.
Rainfall Variability in Sine Saloum River Basin in a Context of Climate Change and Variability

Drought is one of the most worrying manifestations of variability and change of climate in many West African countries. Due to its threats on human life, socio-economic activities, agricultural productivities, shortage of water, natural resources and environments, the problems related to drought have caught the attention of scientists, researchers and policy makers in recent decades. Original Research Article Doumouya et al.; AIR, 6(6): 1-12, 2016; Article no.AIR. 25349 2 The aim of this paper is to characterize and analyze climatic events and their impact on water resources, environmental ecosystems and population. For this, we have selected rainfall time series of Sine Saloum river basin at Foundioune’s rain gauge. We have first conducted an exploratory analysis based on the graphic study. So, histograms relating to annual rainfall, monthly rainfall decadal, interannual monthly rainfall and interannual monthly averages, were analyzed separately compared to the corresponding average; this has highlighted the spatial and temporal distribution of intra and inter annual rainfall compared to the average and allowing viewing wet and dry years and months. We have secondly calculated the drought indices such as standardized precipitation index and normal precipitation index to evaluate climate fluctuations, characterize the progression of drought and its degree of intensity. This has also highlighted the deficit years and surplus years. In total, over the 43 years of the study period, we have counted 13 wet years and 20 dry years. We have also noted that 1971 was the wettest year and 2007 the least wet year. Characterization of these 30 deficit years has highlighted 3 categories of drought: mild drought, moderate drought and great drought. It appears from this study that the impacts of drought can be attributed in part to a deficit or erratic rainfall. Analysis of the results has showed the high vulnerability of the watershed to drought. Examination of drought years revealed a higher frequency in space and in the time of light drought. These results are very useful for drought monitoring, evaluation and mitigation.
A transparent sheet display by plastic MEMS

Abstract— A new type of color‐image display pixel based on MEMS (microelectromechanical systems) technology of plastic materials is presented. The mechanism for making color is optical interference using a Fabry‐Perot interferometer. A thin sheet of PEN (polyethylene naphthalate) with a metal half‐mirror was laminated over a glass or PEN substrate with an optical cavity inside. The electrostatically controlled deformation of the PEN film changes the color of the transmitting light by interference within the optical cavity. Color pixels of three primary colors (red, green, and blue) were successfully developed and demonstrated, with a driving voltage ranging from 80 to 120 Vdc. Thanks to the mechanical flexibility of the PEN films, the display could operate even when placed on a curved surface.
Survey of Indian Machine Translation Systems

Machine Translation (MT) is a sub-field of Artificial Intelligence (AI), which translates the text from one language known as source language into the text of another language known as target language. This paper gives a survey of the work done on various Indian machine translation systems either developed or under the development. Some systems are of general domain, but most of the systems have their own particular domains like parliamentary documents translation, news readings, children stories, web based information retrieval etc. 1. ANUSAARAKA A project named "ANUSAARAKAA" for machine translation from one Indian Language to another Language in 1995. It has been used for translation from Telugu, Kannada, Bengali, Punjabi and Marathi to Hindi language translation and vice versa. The ANUSAARAKA system is a language accessor cum Machine Translation system that works on principles of Paninian Grammar (PG)". The system provides both the robustness incase of failure and no loss of information while translating the text. The output of the system follows the grammar of the source language. The approach for the translation in this system is divided in two parts: 1) The ANUSAARAKA system which is based on language knowledge 2) the domain specific knowledge based on world knowledge, statistical knowledge etc. It was started at IIT Kanpur and now shifted to IIIT Hyderabad Currently ANUSAARAKA is working for Telugu, Kannada, Marathi, Bengali, and Punjabi to Hindi language translation and in near future reverse translation will also be feasible. The output can be post-edited if there is any grammatical error occurs during machine translation. The efficiency of the system was not available (2-4).
A Survey on Secure Data Aggregation in Wireless Sensor Network

In Wireless Sensor Network Data Aggregation is an important technique to achieve power efficiency in the sensor network. In some application such as: wireless sensor network, data mining, cloud computing data aggregation is widely used. Because sensor node has limited battery power so data aggregation techniques have been proposed for wireless sensor networks. A challenge to data aggregation is how to secure aggregated data from disclosing during aggregating process as well as obtain accurate aggregated results. In this survey paper we described various protocols for securing aggregated data in wireless sensor networks. Keywords— Wireless Sensor Network, Data Aggregation, Security needs, Attacks, Security protocols
A new scheme of nearby vehicles' positions recognition and inter-vehicle communication without signal collision-V-PEACE scheme

In this paper, we propose the vehicle position environment acquisition and communication evolution (V-PEACE) scheme and discuss its system architecture. Each vehicle in the V-PEACE scheme can exchange its position information with each other by broadcasting pulses on a time division frame. The pulse is transmitted at a timing decided by the vehicle's position on the road in the V-PEACE scheme, and this scheme can avoid signal collision completely. In addition, a bandwidth requirement and a extension of a communication function keeping compatibility with the unextended scheme are discussed.
3-D data acquisition by Rainbow Range Finder

The Rainbow Range Finder (RRF) has the ability to obtain range information for all image pixels with only one frame TV camera imaging during 1/30 s. The authors propose a novel practical calibration scheme which makes range measurement for all visible pixels possible. An experimental system was developed on that basis, and measurement accuracy was evaluated. A curved surface and a plain surface could be measured with sufficient accuracy. The feasibility of a real-time system with an accuracy of 1% in regard to the measurement region size was demonstrated. <<ETX>>
eGaN FETs in Low Power Wireless Energy Converters

Wireless power applications are gaining popularity in many commodity products such as mobile phone chargers. Most of the wireless power solutions have focused on tight coupling with induction coil solutions at operating frequencies around 200 kHz, and Class E, F and S amplifier converter topologies. Recently, however, there has been a push for operation in the restricted and unlicensed lower ISM band at 6.78 MHz where traditional MOSFET technology is approaching its capability limit. Enhancement mode gallium nitride transistors offer an alternative to MOSFETs as they can switch fast enough to be ideal for wireless power applications. This paper will focus on the experimental evaluation of an induction coil wireless energy system using Efficient Power Conversion’s (EPC) eGaN FETs in a half bridge topology operating at 6.78 MHz designed to be suitable for multiple 5 W USB based charging loads.
Secure Multi-party Communication in Data-mining Applications

Data mining extracts knowledge or patterns from a large amount of data. Secure communication is an issue of shared database applications. Fundamentally, secure multi party computation is to enable a number of networked parties to carry out distributed computing tasks on sensitive information. In this paper, we have proposed two techniques for multi party communication one is for third party assisted and another without third party. Third party assisted technique uses Group based approach and in case of without third party mechanism ECC based approach is used. Simulation results show that the time taken by the schemes are significantly less as compared to other schemes and this proves the efficacy of the proposed scheme which makes it viable for multi party communication in data mining applications.
The development of mathematical reasoning in elementary school students' exploration of fraction ideas

OF THE DISSERTATION The Development of Mathematical Reasoning in Elementary School Students’ Exploration of Fraction Ideas By DINA YANKELEWITZ Dissertation Director: Carolyn A. Maher Reformers and educators across the U.S. and internationally have called for an increased emphasis on the learning and teaching of reasoning, justification, and proof in K-12 and post-secondary mathematics education. Numerous studies have established that students experience difficulty with these processes. Recently, however, analysis of videotape data of sixth grade student work in an informal mathematics program has identified the use of multiple forms of reasoning by middle school students. This qualitative study, drawing on data from seventeen sessions from a longitudinal study conducted by Rutgers University in a fourth grade class of twenty-five students in a suburban/rural school in New Jersey, identified and traced the development of the forms of reasoning and argumentation used by elementary school students as they were introduced to fraction as number concepts and as they used Cuisenaire rods and other manipulative materials to make sense of number relationships. The following research questions guided this study:
The Optimization Design of the Grinding Machine for the Spherical Surface of Tapered Roller Based on MATLAB

In the grinding process of the spherical surface of tapered roller, to guarantee the grinding accuracy of the work piece and to improve its production efficiency, as to the grinding machine equipment, not only the accurate feed relation of grinding wheel and work piece should be guaranteed, but also its process parameters should be optimized The paper designs and analyzes the vertical feed of the work piece and the grinding wheel’s cutting depth of the grinding machine for the spherical surface of tapered roller using Matlab software, ensuring the processing accuracy and the production efficiency of the spherical surface of tapered roller.
Implied information adds richness to ‘lean’ media

E-mail has become an accepted means of communication in working environments, andvirtual teams who infrequently meet face to face tend to use e-mail extensively evenwhen they are involved in complex and sensitive discussions. This paper reports on ananalysis of the e-mails of university students working in virtual teams. It was found thatthe timing of e-mail messages provides implied information and compensates to someextent for the loss of non-verbal cues that are present in face-to-face communication.This implied information contributes to the richness of the information and assists thereader in interpreting not only the message but also the context. As a result, trust canbe established or undermined. Actual examples are provided to illustrate some of theissues.
SAPPHYR: legs to pull a wheel structure

The aim of this paper is to show the evolution of our legged robot project and present our new testbed architecture. The reasons why we have built a hybrid robot composed of wheels and legs are given and its behavior commented. First, we recall the actuated leg model based on a thermodynamic study according to pneumatic actuators, as well as on the dynamic model for the mechanic part. The nonlinear controller which ensures good tracking at high velocities is presented. Experiments lead to a new trajectory planning. Moreover, the structure suggests important remarks concerning legged robot design especially according to interaction effect between legs during a complete gate cycle. According to these results, we propose a general decentralized architecture with a coordinator level to ensure a good behavior of the platform.
Space-Vector PWM With TMS320C24x/F24x Using Hardware and Software Determined Switching Patterns

Space-vector (SV) pulse width modulation (PWM) technique has become a popular PWM technique for three-phase voltage-source inverters (VSI) in applications such as control of AC induction and permanent-magnet synchronous motors. This document gives an in-depth discussion of the theory and implementation of the SV PWM technique. Two different SV PWM waveform patterns, one using the regular compare function on the Texas Instruments (TI ) TMS320C24x/F24x digital signal processors (DSPs) and another implemented with the SV PWM hardware module on the TI TMS320C24x/F24x DSPs are presented, with complete code examples for the TMS320F243/1. At the end, a complete AC induction motor control application is discussed to show the effectiveness of both approaches. PWM waveforms of the presented implementations and experimental data in the form of motor currents are shown and discussed. A full TMS320F243/1 program example is attached. The observation of dead band imbalance for the hardware-implemented SVPWM pattern in this report has not been seen in other publications.
Silicon synaptic homeostasis

Synaptic homeostasis is a mechanism present in biological neural systems used to stabilize the network’s activity. It acts by scaling the synaptic weights in order to keep the neurons firing rate within a functional range, in face of chronic changes of their activity level, while preserving the relative differences between individual synapses. In analog VLSI spike based neural networks, homeostasis is an appealing biologically inspired means to solve technological issues such as mismatch, temperature drifts or long lasting dramatic changes in the input activity level. Here we present a new synaptic circuit, the Diff-PairIntegrator, designed to reproduce the biological temporal evolution of post-synaptic currents, and compatible with implementation of spike-based learning and homeostasis. We describe the silicon synapse and show how it can be used in conjunction with a software control algorithm to model synaptic scaling homeostatic mechanisms.
survPresmooth: An R Package for Presmoothed Estimation in Survival Analysis

The survPresmooth package for R implements nonparametric presmoothed estimators of the main functions studied in survival analysis (survival, density, hazard and cumulative hazard functions). Presmoothed versions of the classical nonparametric estimators have been shown to increase efficiency if the presmoothing bandwidth is suitably chosen. The survPresmooth package provides plug-in and bootstrap bandwidth selectors, also allowing the possibility of using fixed bandwidths.
Wavelet-based image processing: edge detection and noise reduction

A novel wavelet-based algorithm for radar image processing is proposed. The algorithm is based on a representation of image edges with template wavelet coefficients. Edge enhancement, noise reduction, and image object extraction capabilities of the proposed algorithm are discussed. The algorithm has been used to process data obtained with a dual frequency 36 and 95 GHz airborne side-looking radar.
Analysis of range ambiguity suppression in SAR by up and down chirp modulation for point and distributed targets

This Paper provides a demonstrative derivation of the effect of up and down chirp modulation on point and extended target signals. Analysis has been performed with respect to signal amplitude, signal extension, modulation rate and phase behavior. The suppression of "point target" range ambiguities is investigated for the a possible TerraSAR-X parameter setting. Extended targets have been simulated and filtered. A Range-Ambiguity Simulator is under development which is based on airborne X-band data from the Experimental SAR (E-SAR) of DLR. The simulator concept is presented.
Extracting a bilingual transdisciplinary scientific lexicon

In lhis paper, we propose a first step leading to the description of the lexicon of scientific language by extracting a transdisciplinary scientifie lexicon (TSL) in French and English. We consider that the TSL is domain independent and forms a central lexical core of all domains; it is at the center of the argumentation, the description and the structuring processes we observe in scientific discourse. In order to extract the transdisciplinary lexicon, we use natural language processing tools and statistical techniques. Our identification method relies on two main ideas. The distribution of the TSL in all scientific documents and the specificity of the TSL 10 scientific documents.
Applying Open Researchers and Contributors ID in scholarly journals

Open Researchers and Contributors ID (ORCID) launched its registry services in October 2012. Consequently, adding personal information to the ORCID registry became routine work for researchers. To add ORCID to an online article, the tag needs to be included in the Journal Article Tag Suite extensible markup language file, if such a file has been produced by the publisher. Subsequently, all co-authors’ ORCID can be easily and conveniently collected and then integrated into the manuscript management system. In the current age of information and the Internet, journals need to keep pace with the surge of new standards and technologies. Editors should be able to accept and apply these new systems rapidly.