bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computational Morphological Analysis of Yorùbá Language Words
Authors: Eludiora Safiriyu Ijiyemi , Ayemonisan O R 
Published: April 2019

Nigeria official languages are English, Yorùbá, Igbo and Hausa. The focus of the study reported in this paper is to develop learning tool that can assist learners to learn the Yorùbá language using its alphabets. The study is critical to Yorùbá language, because of its endangerment. There is need to introduce different learning tools that can mitigate its extinction. A Yorùbá word perfect system was developed to assist people in learning the Yorùbá language. English and Yorùbá words formation are experimented using computational morphological approach (word formation). The theoretical framework considered Finite state automata (FSA) to realise different ways of combining the consonants and vowels to form word. Two to five letter words were considered. The system was designed and implemented using UML tools and python programming language.The system will teach the users on how the words are formed, and the number of syllables in each word. The user need not to know how to tone mark word before he/she can use the system. Any word typed will be analysed according to its number of syllables. This approach produces representatives of all parts of speech (POS) of the two languages. It produces corpora for the two languages
Analysis of Various Carriers Overlapping PWM Strategies for a Single Phase Ternary Multilevel Inverter
Authors: Balamurugan C. R. , Bensraj R. 
Published: April 2019

<p>Multilevel inverters are used in power conversion system due to improved voltage and current waveforms. This paper presents the comparison of various Carrier Overlapping Pulse Width Modulation (COPWM) Strategies for the three phase Cascaded Multi Level Inverter (CMLI). Various new schemes adopting the constant switching frequency and also variable switching frequency multicarrier control freedom degree combination concepts are developed and simulated for the chosen three phase CMLI. A single phase CMLI is controlled in this paper with Sinusoidal PWM (SPWM) reference along with Carrier Overlapping (CO) techniques and simulation is performed using MATLAB-SIMULINK. The variation of fundamental RMS output voltage and total harmonic distortion is observed for various carrier overlapping techniques. Among the various equal amplitude and unequal amplitude carriers carrier overlapping techniques such as COPWM-A, COPWM-B and COPWM-C, It is observed from Table 4 that all PWM method provides output with relative low distortion for equal amplitude carriers. If equal voltage sources are chosen then the THD will be less in the case of unequal amplitude carriers. But for the unequal voltage sources the THD is more in the case of unequal amplitude carriers. It is observed from simulation results that (Table-5) almost in all the strategies unequal amplitude carriers gives more fundamental RMS values compared to equal amplitude carriers. It is seen from table 6 that peak voltage is more in the case of unequal amplitude carriers compared to equal amplitude carriers. It is observed from the table 7 that dc components are less in both equal and unequal amplitude carriers.</p>
Localized Transient Stability (LTS) Method for Real-time Localized Control
Authors: Miah Abdul Malek 
Published: April 2019

<p>Very recently, a new methodology was introduced solely for the purpose of real-time localized control of transient stability. The proposed new method is based on the localized transient stability of a power system. This is completely a new idea in transient stability. In this method, the post-fault power system is represented by a two-generator localized power system at the site of each individual generator. If each of these localized power systems reaches its respective stable equilibrium, then the full power system also reaches its stable equilibrium. Therefore, in terms of real-time localized control of transient stability, if each of the localized power systems is driven to its respective stable equilibrium by local control actions with local computations using the locally measured data, then the full power system is driven to its stable equilibrium. Thus the method can be easily implemented for real-time localized control of transient stability. In this paper, the details of the mathematical formulations are presented. Some interesting test results on the well-known New England 39-bus 10-generator system are also presented in this paper to demonstrate the potential of the proposed method for use in real-time localized control of transient stability.</p><p> </p>
Quadrotor Control System with Hand Movement Sign as an Alternative Remote Control
Authors: Putro Nur Achmad Sulistyo , Dharmawan Andi , Priyambodo Tri Kuntoro 
Published: April 2019

Quadrotor is an unmanned aerial vehicle which is controlled by remote control. Unfortunately, not all of the remote control are easy to use, especially for people who have lacking abilities in piloting. This study aims to design a prototype system to control quadrotor using hand movements, as an alternative to the conventional remote control that more simple. This system is consists of 2 parts, quadrotor and handheld. Both systems can communicate wirelessly using radio frequency 2.4 GHz. The handheld system will read the orientation angle of the hand by IMU sensor and it will be converted into a command to determine the direction motion of the quadrotor. To get the orientation angle from the IMU sensor data, we used DCM sensor fusion method. Quadrotor needs a control system that can make its respond runs optimally. In this study, the method of the control system that used is PID controller. The PID gain obtained using Ziegler-Nichols oscillation method and then fixed again by fine-tuned method.
Exploration Strategies of Coordinated Multi-Robot System: A Comparative Study
Authors: El shenawy Ayman. , Mohamed Khalil. , M. Harb Hany. 
Published: April 2019

Environment Exploration is the basic process that most of Multi Robot Systems applications depend on it. The exploration process performance depends on the coordination strategy between the robots participating in the team. In this paper the coordination of Multi Robot Systems in the exploration process is surveyed, and the performance of different Multi Robot Systems exploration strategies is contrasted and analyzed for different environments and different team sizes.
Harmonic Analysis of Three-phase Fixed Capacitor–thyristor Controlled Reactor under Balanced and Unbalanced Conditions
Authors: Badugu Jayababu , P.Obulesu Y. , Saibabu Ch. 
Published: April 2019

Three-phase Fixed Capacitor Thyristor Controlled Reactor is widely used for reactive power compensation in power systems because of reduced cost and high reliability. The problem with FC-TCR is that to generate current harmonics when it is partially conducting. When this harmonic current is interacted with system impedance, voltage waveform will distorted. This harmonic pollution is undesirable in power systems. Therefore, it is important to know the harmonic behaviour of three-phase FC-TCR before they can be used in a power system network. This paper presents the harmonic analysis of three-phase FC-TCR operating under balanced and unbalanced conditions. This analysis is useful to design the harmonic filter to reduce the harmonic pollution in power systems.The proposed work is implemented in MATLAB environment.
Implement the Harmonic Search Algorithm with Optimum Location of Capacitors Sizing and Dispatchable DGs to Control the Reactive Power on Interconnected Bus System
Authors: Suneetha M. , Rao R.Srinivasa , Subramanyam B. 
Published: April 2019

<p>Power system is combination of generation, transmission and Distribution Network. In modern trends power system operation is very difficulty due to energy storage elements, and variable inductive load. In power system, control the reactive power is essential to maintain the safe and more reliability of power system operation. In this paper, to organize the real power and reactive power by optimizing and sizing of capacitors and Dispatchable Distribution generators in a distribution network with help of Harmonic Search Algorithm. The constraints of power system like voltage, real power and reactive and branch current carrying capacity are included in the evaluation of the objective function. To validate planned development network an IEEE 30 bus investigation system is considered.</p>
Implementation of High Speed Self Switching Frequency Agile RADAR
Authors: Lakshmi K Jansi , Narayana Reddy K Surya 
Published: April 2019

<div class="WordSection1"><p><strong><a href="mailto:suryak1986@yahoo.com"></a></strong></p></div><strong> </strong>The radar has to resist diversified jamming; High Speed self-adaptive frequency agility is an important and effective function for radars to resist jamming. The procedure to achieve this function are described, and the function is realized with FPGA using Hardware description Language, the validity is proved by on- line sampling and simulation. The High speed self-adaptive frequency agility module can analyze the type of jamming to select transmitting frequency to avoid the frequencies which have interference, under frequency diversity and fixed frequency, respectively. The general application on a searching radar shows that the module has good real-time and anti- jamming capacity.
Real-Time Algorithms and Architectures for several user Channel Detection in Wireless Base Station Receivers
Authors: Meena Nitish , Parihar Nilesh 
Published: April 2019

In this paper presents algorithms and architecture designs that can meet real-time requirements of for several user channel estimation and detection in code-division multiple-access-based wireless base-station receivers. Entangled algorithms proposed to implement several user channel assessment and demodulation make their real-time execution difficult on current digital signal processor-based receivers. A based several user channel assessment scheme requiring matrix conversion is draft again from an demodulation perspective for a reduced intricacy, repetitive scheme with a simple fixed-point very large scale integration architecture. A reduced-intricacy, bit-streaming several user demodulation algorithm that avoids the need for demodulation is also developed for a simple, pipelined VLSI architecture. Thus, we develop real-time solutions for several user channel assessment and demodulation for third-generation wireless systems by: 1) designing the algorithms from a fixed-point execution perspective, without significant loss in error rate performance; 2) task partitioning; and 3) designing bit-streaming fixed-point VLSI architectures that explore pipelining, correspondence, and bit-level computations to achieve real-time with minimum area overhead.
An Efficient Framework for Floor-plan Prediction of Dynamic Runtime Reconfigurable Systems
Authors: Al-Wattar Ahmed , Areibi Shawki , Grewal Gary 
Published: April 2019

<p>Several embedded application domains for reconfigurable systems tend to combine <br />frequent changes with high performance demands of their workloads such as image processing, wearable computing and<br />network processors. Time multiplexing of reconfigurable hardware resources raises a number of new issues, ranging <br />from run-time systems to complex programming models that usually form a Reconfigurable<br />hardware Operating System (ROS). The Operating System performs online task scheduling and handles resource management.<br />There are many challenges in adaptive computing and dynamic reconfigurable systems. One of the major understudied challenges<br />is estimating the required resources in terms of soft cores, Programmable Reconfigurable Regions (PRRs), <br />the appropriate communication infrastructure, and to predict a near optimal layout and floor-plan of the reconfigurable logic fabric. <br />Some of these issues are specific to the application being designed, while others are more general and relate to the underlying run-time environment.<br />Static resource allocation for Run-Time Reconfiguration (RTR) often leads to inferior and unacceptable results. <br />In this paper, we present a novel adaptive and dynamic methodology, based on a Machine Learning approach, for predicting and<br />estimating the necessary resources for an application based on past historical information.<br />An important feature of the proposed methodology is that the system is able to learn and generalize and, therefore, is expected to improve <br />its accuracy over time. The goal of the entire process is to extract useful hidden knowledge from the data. This knowledge is the prediction <br />and estimation of the necessary resources for an unknown or not previously seen application.<br /><br /></p>
An Automated Way of Baking Process for Moisture Sensitive Components
Authors: Ramamoorthy A. , Jagadeeshraja M. , Manivannan L. , Raja K. 
Published: April 2019

<p>The objective of my project is to the new technology termed as “baking process” to remove the moisture content available in the particular electronics devices which is used in Rea time industrial application. In Industries there are certain policies are maintained for semiconductor devices, which referred as “Shelf life” of the material. Once it crossed its lifetime, some process need to done to extend this. Depends on the moisture sensitive characteristics baking is employed mainly to shelf life extension. The Baking is the process of removing of moisture content from particular semiconductor device in order to effective usage in the production line. In my propose method the moisture content is measured by corresponding moisture sensor. If it is normal level the processor goes to the normal state, If it is reaches the abnormal level (presence of moisture) the processor baked the product. Temperature and humidity sensors are effectively monitor and provide the signal to the processor. The UTLP kit provide the information about the status of the product.<strong></strong></p>
Design and Implementation of 8x8 Multiplier using 4-2 Compressor and 5-2 Compressor
Authors: Kishore K. Hari , Akhil K. , Viswanath G. , Kumar N. Pavan 
Published: April 2019

In this paper, a 8x8 multiplier is realized by using 4-2 and 5-2 compressors. Low-power high speed 4-2 compressors and 5-2 compressors are extensively utilized for numerical realizations. Both the compressors circuits that is the 4-2 compressor circuit and 5-2 compressor circuit internally consist of the logic gates i.e. the XOR and XNOR gates. 4-2 compressor circuit has been designed uses a brand new partial-product reduction format that consecutively reduces the utmost output new style of number needs less variety of MOSFET’s compared to Wallace Tree Multipliers. The 4-2 compressor used is created from high-speed and consists of logic gates XOR and XNOR gates and transmission gate primarily based electronic device. The regular delay and switching energy also called as power-delay product (PDP) is differentiated with the 5-2 compressor enforced with 4-2 Compressors and while not compressors, and is evidenced to own minimum delay and PDP. Simulations are performed by mistreatment Xilinx ten.1 ISE.
Thirty-Day Readmission Risk Model for Older Adults Hospitalized With Acute Myocardial Infarction
Authors: Dodson John A. , Hajduk Alexandra M. , Murphy Terrence E. , Geda Mary , Krumholz Harlan M. , Tsang Sui , Nanna Michael G. , Tinetti Mary E. , Goldstein David , Forman Daniel E. , Alexander Karen P. , Gill Thomas M. , Chaudhry Sarwat I. 
Published: April 2019

Background:
Early readmissions among older adults hospitalized for acute myocardial infarction (AMI) are costly and difficult to predict. Aging-related functional impairments may inform risk prediction but are unavailable in most studies. Our objective was to, therefore, develop and validate an AMI readmission risk model for older patients who considered functional impairments and was suitable for use before hospital discharge.

Methods and Results:

SILVER-AMI (Comprehensive Evaluation of Risk in Older Adults with AMI) is a prospective cohort study of 3006 patients of age ≥75 years hospitalized with AMI at 94 US hospitals. Participants underwent in-hospital assessment of functional impairments including cognition, vision, hearing, and mobility. Other variables plausibly associated with readmissions were also collected. The outcome was all-cause readmission at 30 days. We used backward selection and Bayesian model averaging to derive (N=2004) a risk model that was subsequently validated (N=1002). Mean age was 81.5 years, 44.4% were women, and 10.5% were nonwhite. Within 30 days, 547 participants (18.2%) were readmitted. Readmitted participants were older, had more comorbidities, and had a higher prevalence of functional impairments, including activities of daily living disability (17.0% versus 13.0%;
P
=0.013) and impaired functional mobility (72.5% versus 53.6%;
P
<0.001). The final risk model included 8 variables: functional mobility, ejection fraction, chronic obstructive pulmonary disease, arrhythmia, acute kidney injury, first diastolic blood pressure, P2Y12 inhibitor use, and general health status. Functional mobility was the only functional impairment variable retained but was the strongest predictor. The model was well calibrated (Hosmer-Lemeshow
P
value >0.05) with moderate discrimination (C statistics: 0.65 derivation cohort and 0.63 validation cohort). Functional mobility significantly improved performance of the risk model (net reclassification improvement index =20%;
P
<0.001).

Conclusions:
In our final risk model, functional mobility, previously not included in readmission risk models, was the strongest predictor of 30-day readmission among older adults after AMI. The modest discrimination indicates that much of the variability in readmission risk among this population remains unexplained by patient-level factors.

Clinical Trial Registration:

URL:
https://www.clinicaltrials.gov.
Unique identifier: NCT01755052.
First records of Parergodrilus heideri (Annelida: "Polychaeta") from North America
Authors: SCHLAGHAMERSKÝ JIŘÍ , FRELICH LEE E. 
Published: April 2019

Parergodrilus heideri Reisinger, 1925 is one of two species of the family Parergodrilidae (together with the marine litoral, interstitial species Stygocapitella subterranea Knöllner, 1934) and one of only two truly soil-dwelling “polychaetes” (the other being Hrabeiella periglandulata Pižl and Chalupský, 1984) that are predominantly known from terrestrial habitats (Reisinger 1925, 1960; Römbke and Jans 1991; Chalupský 1992; Graefe 1993; Rota 1997, 1998; Purschke 1999; Rota et al. 2001; Beylich and Graefe 2007; Martinez-Ansemil and Parapar 2009; Rota et al. 2010). Due to its small body size (adults up to 1 mm) and sensitivity to dessication, the species has usually been found by researchers using some type of wet extraction for soil mesofauna, such as enchytraeids and free-living flatworms (“turbellarians”). However, due to its similar chaetae, Parergodrilus heideri can be easily mistaken for a freshly hatched enchytraeid, even by enchytraeid specialists without experience with this species.
The Mediterranean Sea Overturning Circulation
Authors: Pinardi Nadia , Cessi Paola , Borile Federica , Wolfe Christopher L. P. 
Published: April 2019

AbstractThe time-mean zonal and meridional overturning circulations of the entire Mediterranean Sea are studied in both the Eulerian and residual frameworks. The overturning is characterized by cells in the vertical and either zonal or meridional planes with clockwise circulations in the upper water column and counterclockwise circulations in the deep and abyssal regions. The zonal overturning is composed of an upper clockwise cell in the top 600 m of the water column related to the classical Wüst cell and two additional deep clockwise cells, one corresponding to the outflow of the dense Aegean water during the Eastern Mediterranean Transient (EMT) and the other associated with dense water formation in the Rhodes Gyre. The variability of the zonal overturning before, during, and after the EMT is discussed. The meridional basinwide overturning is composed of clockwise, multicentered cells connected with the four northern deep ocean formation areas, located in the Eastern and Western Mediterranean basins. The connection between the Wüst cell and the meridional overturning is visualized through the horizontal velocities vertically integrated across two layers above 600 m. The component of the horizontal velocity associated with the overturning is isolated by computing the divergent components of the vertically integrated velocities forced by the inflow/outflow at the Strait of Gibraltar.
Performance Characteristics of “Spotter,” a Newly Developed Real-Time Wave Measurement Buoy
Authors: Raghukumar Kaustubha , Chang Grace , Spada Frank , Jones Craig , Janssen Tim , Gans Andrew 
Published: April 2019

AbstractThe Spotter is a low-cost, real-time, solar-powered wave measurement buoy that was recently developed by Spoondrift Technologies, Inc. (Spoondrift). To evaluate the data quality of the Spotter device, we performed a series of validation experiments that included comparisons between Spotter-derived motions and prescribed wave motions (monochromatic and random waves) on a custom-built, motion-controlled validation stand and simultaneous in-water measurements using a conventional wave measurement buoy, the Datawell DWR-G4 (Datawell). Spotter evaluations included time-domain validation (i.e., wave by wave) and comparisons of wave spectra, directional moments, and bulk statistical parameters such as significant wave height, peak period, mean wave direction, and directional spread. Spotter wave measurements show excellent fidelity and lend a high degree of confidence in data quality. Overall, Spotter-derived bulk statistical parameters were within 10% of respective Datawell-derived quantities. The Spotter’s low cost and compact form factor enabled unique field deployments of multiple wave measurement buoys for direct measurements of wave characteristics such as ocean wave decorrelation length scales, wave speed, and directional spread. Wave decorrelation lengths were found to be inversely proportional to the width of the spectrum, and wave speeds compared well against linear wave theory.
Hearing as an Independent Predictor of Postural Balance in 1075 Patients Evaluated for Dizziness
Authors: Berge Jan Erik , Nordahl Stein Helge Glad , Aarstad Hans Jørgen , Goplen Frederik Kragerud 
Published: April 2019

ObjectiveTo evaluate the association between hearing and postural balance.Study DesignRetrospective cross‐sectional study.SettingTertiary care otolaryngology clinic.Subjects and MethodsPatients examined for suspected vestibular disorder were included in this study. The outcome variable was postural sway measured by static posturography during quiet standing with eyes closed. The predictor variable was pure‐tone average hearing threshold on the best hearing ear at 0.5, 1, 2, and 3 kHz. Covariates were age, sex, and vestibular disease or vestibular asymmetry assessed by bithermal caloric irrigation.ResultsIn total, 1075 patients were included. Increased hearing threshold was a strong predictor of increased postural sway (path length) after correcting for age and sex. A 10‐dB increase in hearing loss on the best hearing ear predicted a mean 6.0% increase in path length (confidence interval, 2.9%‐9.3%, P <. 001). Of the covariates, increasing age (P <. 001) and male sex (P =. 009) were significant predictors of increased postural sway. The effect of increased hearing threshold was also significant after adjusting for vestibular disease.ConclusionIncreased hearing threshold was an independent predictor of increased postural instability, and this effect was strongest for the best hearing ear. Unilateral vestibular disease did not seem to explain this association between hearing and postural balance. Reduced hearing is associated with impaired balance, and interventions to prevent falls should be considered for patients at risk.