bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improved Performance of DPFC Using Sliding Mode Controller Method
Authors: Rao D Narasimha , Surnedra T , Kalyani S Tara 
Published: October 2019

<p>Modern power systems demand the need of active power flow with the help of Power Electronics control devices is needed. In the family of Flexible AC Transmission devices (FACTS), Dynamic PFC (DPFC) offers the same controlling function as Unified PFC (UPFC), comprising the control of transmission angle, bus voltage and line impedance. A technical modification of UPFC is DPFC in which fluctuations of voltage at DC link is eliminated that enables the individual operation as series and parallel controllers. The concept of DFACTS is used in design of the series converter. The replacement of the high rating three phase series converter with the multiple low rating single phase converters results in cost reduction and increases reliability greatly. This DC Link is used to transfer the real power between two converters in UPFC such as in DPFC which eliminates the 3rd harmonic frequencies at transmission lines. D-FACTS converters are acting as insulation between high voltage phases acts as 1-ᴓ floating with respect to ground. These results in lower cost for the DPFC system compared to the UPFC. This paper describes the comparison of PI and Sliding Mode Controllers which conclude that SMC is a better control strategy compared to PI.</p>
The Analysis of Student Colla borative Work Inside Social Learning Network Analysis Based on Degree and Eigenvector Centrality
Authors: Mansur Andi Besse Firdausiah , Yusof Norazah , Basori Ahmad Hoirul 
Published: October 2019

<p>Social learning network analysis is a potential approach to analyze the behaviour of students in collaborative work. However, most of the previous works focus on asynchronous discussion forum as the learning activity. Very few of them are trying to analyze the students' collaborative work while using wiki e-learning. This paper proposes the degree centrality and eigenvector method for identifying the collaborative work of students while in wiki e-learning. The log data of the Moodle e-learning system is observed that records the students' activities and actions while using wiki. The result shows that there is a close similarity between the degree centrality and the eigenvector. The result also reveals the students who obtain high outdegree values. Furthermore, Agent_1 and Agent_12 represent the students who obtained high outdegree values, which mean these two nodes are acting as source providers that able to supply information and knowledge through the network. This result also strengthened by value of closeness and betweenness where Agent_1 and Agent_12 leading on this measurement. The high closeness value of Agent_1 and Agent_12 will lead into fast spreading information since they have fastest route and has the most direct route to the other node inside the network, thus collaborative work is easy to be initialized by these Agents. This work has successfully identified collaborative work of student. This finding is believed to bring enormous benefit on the e-learning system improvement in the future.</p>
Transient Phenomena during the Three-Phase 300MVA Transformer Energization on the Transmission Network
Authors: Alibašić Emir , Marić Predrag , Nikolovski Srete N 
Published: October 2019

<p>Connecting the transformer to the network may incur inrush current, which is significantly higher than the rated current of the transformer. The main cause of this phenomenon lies in the nonlinearity of the magnetic circuit. The value of the inrush current depends of the time moment of the energization and the residual magnetism in the transformer core. While connecting, the operating point of the magnetization characteristic can be found deep in the saturation region resulting in occurrence of large transformer currents that can trigger the transformer protection. Tripping of protection immediately after the transformer energization raises doubts about the transformer health. Inrush current can cause a number of other disadvantages such as the negative impact on other transformers connected on the same busbar; the increase of the transformer noise due to the large current value, the increase of the voltage drops in the network. The paper presents a simulation of the 300 MVA transformer energization using the MATLAB/Simulink software.</p><p> </p><p> </p>
The Global Survey of the Electrical Energy Distribution System: A Review
Authors: Talhar Archana Sudhakar , Bodkhe Sanjay B. 
Published: October 2019

This paper gives a review of energy scenario in India and other countries. Today’s demand of the world is to minimize greenhouse gas emissions, during the production of electricity. Henceforth over the world, the production of electrical power is changing by introducing abundantly available renewable energy sources like sun and wind. But, because of the intermittent nature of sustainable power sources, the electrical power network faces many problems, during the transmission and distribution of electricity. For resolving these issues, Electrical Energy Storage (EES) is acknowledged as supporting technology. This paper discusses about the world electrical energy scenario with top renowned developed countries in power generation and consumption. Contribution of traditional power sources changed after the introduction of renewable energy sources like sun and wind. Worldwide Agencies are formed like International Energy Agency (IEA), The Central Intelligence Agency, (CIS) etc. The main aim of these agencies is to provide reliable, affordable and clean energy. This paper will discuss about the regulatory authority and government policies/incentives taken by different countries. At the end of this paper, author focuses on obstacles in implementation, development and benefits of renewable energy.
Power System Reliability Assessment in a Complex Restructured Power System
Authors: Lindsay N.Mahiban , Parvathy A.K. 
Published: October 2019

The basic purpose of an electric power system is to supply its consumers with electric energy as parsimoniously as possible and with a sensible degree of continuity and quality. It is expected that the solicitation of power system reliability assessment in bulk power systems will continue to increase in the future especially in the newly deregulated power diligence. This paper presents the research conducted on the three areas of incorporating multi-state generating unit models, evaluating system performance indices and identifying transmission paucities in complex system adequacy assessment. The incentives for electricity market participants to endow in new generation and transmission facilities are highly influenced by the market risk in a complex restructured environment. This paper also presents a procedure to identify transmission deficiencies and remedial modification in the composite generation and transmission system and focused on the application of probabilistic techniques in composite system adequacy assessment
A Low Cost Wearable Medical Device for Vital Signs Monitoring in Low-Resource Settings
Authors: Niswar Muhammad , Nur Muhammad , Mappangara Idar 
Published: October 2019

Medical devices are often expensive, so people in low-income countries cannot afford them. This paper presents the design of a low-cost wearable medical device to measure vital signs of a patient including heart rate, blood oxygen saturation level (SpO2) and respiratory rate. The wearable medical device mainly consists of a microcontroller and two biomedical sensors including airflow thermal sensor to measure respiratory rate and pulse oximeter sensor to measure SpO2 and heart rate. We can monitor the vital signs from a smartphone using a web browser through IEEE802.11 wireless connectivity to the wearable medical device. Furthermore, the wearable medical device requires simple management to operate; hence, it can be easily used. Performance evaluation results show that the designed wearable medical device works as good as a standard SpO2 device and it can measure the respiratory rate properly. The designed wearable medical device is inexpensive and appropriate for low-resource settings. Moreover, as its components are commonly available in the market, it easy to assembly and repair locally.
Radio over fiber system based on a hybrid link for next generation of optical fiber communication
Authors: Alaoui Kaoutar Saidi , Foshi J. , Zouine Y. 
Published: October 2019

<p>Radio over fiber technology will play an important role in solving problems facing wireless technology. Envisaging a global village, people could transmit and receive “anytime, anywhere, and anything”. In addition, the explosive growth in internet applications such as the World Wide Web, demonstrates the tremendous increase in bandwidth and low power that the coming world of multimedia interactive applications will require from future networks. ROF technology uses multicarrier modulation like orthogonal frequency division multiplexing (OFDM), which provides an opportunity of having an increased in bandwidth together with an affordable cost and this idea has recently become a suitable topic for many research works. On the other hand, SAC-OCDMA (Spectral Amplitude Coding Optical Code Division Multiple Access) technique is able to enhance the data rate of system and increase the number of user. In this paper we introduce a ROF link using a hybrid OFDM/SAC-OCDMA technique.</p>
Potential and impact study of amman high frequency speed bus, a case study
Authors: Samarah Ashraf , Hiary Afaq , Amayira Ameera , Asheesh Hiba , Al-Rawashdeh Ayman Y. 
Published: October 2019

The current study proposes the utilization of solar panels to power high frequency speed buses like the Bus Rapid Transit in Am-man city. Based on Photo Voltaic technology, mounting PV solar panels system on the top of the track of the high frequency bus, ar-ranged at azimuth angle ranging between 0°- 90° with the best tilt angle measured 12°, along an actual unshaded track of 18 km (of the 25 km total pathway track), resulted in the generation of more than18 MWp (On Grid system). Such power is used not only to charge the bus and to operating facilities inside the city instead of the conven-tional ways as illustrated in the coming later.
Terrestrial free space optical communications in Bangladesh: transmission channel characterization
Authors: Shahiduzzaman Kazi , Haider Majumder F. , Karmaker Bijoy K. 
Published: October 2019

This research work focused on transmission channel characterization of Free-Space-Optical (FSO) communications technology for deploying in the developing country like Bangladesh. To meet the tremendous amount of data traffic, mobile operators and ISPs need better solution than the existing RF and fiber optic communications. Moreover, Bangladesh is entering in the era of satellite communications by launching its own satellite. So, Bangladesh needs such communication technology that provides higher channel bandwidth, sophisticated transmission security and can cope channel dispersion. FSO is a good candidate that can meet all these features. The transmission channel characterization plays a significant role in optimizing the performance of FSO link. In this work, the channel characterization of FSO technology from the weather perspective of Bangladesh has been investigated thoroughly. The obtained results show that the atmospheric scattering effect does not hamper the short range FSO link performance, whereas, the atmospheric turbulence effect is not favorable to deploy FSO technology with reasonable quality signal unless it is optimized properly using antenna aperture averaging technique.
A hyprid technique for human footprint recognition
Authors: Ibrahim Yahya Ismail , Alhamdani Israa Mohammed 
Published: October 2019

Biometrics has concerned a great care recently due to its important in the life that starts from civil applications to security and recently terrorism. A Footprint recognition is one of the personal identifications based on biometric measurements. The aim of this research is to design a proper and reliable biometric system for human footprint recognition named (FRBS) that stands for Footprint Recognition Biometric System. In addition, to construct a human footprint database which it is very helpful for various use in scientific application e.g. for authentication. There exist many biometrics databases for other identity but very rare for footprint. As well as the existing one are very limited. This paper presents a robust hyprid techniques which merges between Image Processing with Artificial Intelligent technique via Ant Colony Optimization (ACO) to recognize human footprint. (ACO) plays the essential role that rise the performance and the quality of the results in the biometric system via feature selection. The set of the selected features was treated as exploratory information, and selects the optimum feature set in standings of feature set size. Life RGB footprint images from nine persons with ten images per person constructed from life visual dataset. At first, the visual dataset was pre-processed operations. Each resultant image detects footprint that is cropped to portions represented by three blocks. The first block is for fingers, the second block refers to the center of the foot and the last one determines the heel. Then features were extracted from each image and stored in Excel file to be entered to Ant Colony Optimization Algorithm. The experimental outcomes of the system show that the proposed algorithm evaluates optimal results with smaller feature set comparing with other algorithms. Experimental outcomes show that our algorithm obtains an efficient and accurate result about 100% accuracy in comparison with other researches on the same field.
A novel compact CPW Band-stop filter using O-DGS configuration
Authors: Sghir Elmahjouby , Errkik Ahmed , Zbitou Jamal , El abdellaoui Larbi , Tajmouati Abdelali , Latrach Mohamed 
Published: October 2019

<p>A novel and compact multi-band stop filter using two different structures of circular DGS and circular DGS loaded with O-DGS unit, has good selectivity and wide upper pass band performance with good rejection based on defected ground structure (DGS) integrating a circular ring resonator to suppress undesired spurious bands frequency or harmonics in radio frequency and microwave circuits is proposed. An equivalent circuit model has been derived for the both structures of circular DGS and circular DGS loaded. The presented filter has a compact size because the circular ring resonator is integrated in DGS, the both of them are etching in the ground plane. The proposed filter presents an optimization method for generating multi-band characteristics without using a periodic cells or other complicate topology. The simulated results by ADS Agilent are presented and compared with the results simulated by two others software: CST and HFSS. Good agreement between the three simulated results is observed.</p>
Performance degradation assessment and VM placement policy in cloud
Authors: J. A. Nair Susmita , Nair T. R. Gopalakrishnan 
Published: October 2019

In virtualized servers, with live migration technique pages are copied from one physical machine to another while the virtual machine (VM) is running. The dynamic migration of virtual machines encumbers the data center which in turn reduces the performance of applications running on that particular physical machine. A considerable number of studies have been carried out in the area of performance evaluation during live VM migration. However, all the aspects related to the migration process have not been examined for the performance assessment. In this paper, we propose a novel approach to evaluate the performance during migration process in different types of coupled machine environment. It is presented here that the state of art VM migration technology requires further improvement in realizing effective migration by monitoring comprehensive performance value. We introduced the parameter, θ, to compare performance value which can be used for controlling and halting unsuccessful migration and save significant amount of time in migration operation. Our model is capable of analyzing real time scenario of cloud performance assessment targeting VM migration strategies. It also offers the possibility of further expanding to universal models for analyzing the performance variations that occurs as a result of VM migration.
A proposed architecture of big educational data using hadoop at the University of Kufa
Authors: Mjhool Ahmed Yaseen , Alhilali Ahmed Hazim , Al-augby Salam 
Published: October 2019

<span>Nowadays, educational data have been increased rapidly because of the online services provided for both students and staff. University of Kufa (UoK) generates a massive amount of data annually due to the use of e-learning web-based systems, network servers, Windows applications, and Students Information System (SIS). This data is wasted as traditional management software are not capable to analysis it. As a result, the Big Educational Data concept rises to help education sectors by providing new e-learning methods, allowing to meet individual demands and reach the learners' goals, and supporting the students and teacher’s interaction. This paper focuses on designing Big Data analysis architecture, based on the Hadoop in the UoK and the same case for other Iraqi universities. The impact of this work, help the students learn, emphasizing the need of academic researchers and data science specialist for learning and practicing Big Data analytics and support the analysis of the e-learning management system and set the first step toward developing data repository and data policy in UoK.</span>
Sleep Spindle-dependent Functional Connectivity Correlates with Cognitive Abilities
Authors: Fang Zhuo , Ray Laura B. , Houldin Evan , Smith Dylan , Owen Adrian M. , Fogel Stuart M. 
Published: October 2019

Abstract
EEG studies have shown that interindividual differences in the electrophysiological properties of sleep spindles (e.g., density, amplitude, duration) are highly correlated with trait-like “reasoning” abilities (i.e., “fluid intelligence”; problem-solving skills; the ability to employ logic or identify complex patterns), but not interindividual differences in STM or “verbal” intellectual abilities. Previous simultaneous EEG-fMRI studies revealed brain activations time-locked to spindles. Our group has recently demonstrated that the extent of activation in a subset of these regions was related to interindividual differences in reasoning intellectual abilities, specifically. However, spindles reflect communication between spatially distant and functionally distinct brain areas. The functional communication among brain regions related to spindles and their relationship to reasoning abilities have yet to be investigated. Using simultaneous EEG-fMRI sleep recordings and psychophysiological interaction analysis, we identified spindle-related functional communication among brain regions in the thalamo-cortical-BG system, the salience network, and the default mode network. Furthermore, the extent of the functional connectivity of the cortical–striatal circuitry and the thalamo-cortical circuitry was specifically related to reasoning abilities but was unrelated to STM or verbal abilities, thus suggesting that individuals with higher fluid intelligence have stronger functional coupling among these brain areas during spontaneous spindle events. This may serve as a first step in further understanding the function of sleep spindles and the brain network functional communication, which support the capacity for fluid intelligence.
Nationalist Sentiments Obscured by ‘Pejorative Labels’
Authors: Bumochir Dulam 
Published: October 2019

Abstract
This paper aims to unveil sources of nationalist sentiments that are often disregarded, in part because they are often given ‘pejorative labels’ such as ‘populist’ and ‘resource nationalist’ by those who promote the market economy and mining industry. Anthropologists can extend their research beyond such labelling and find out what is at the origin of such popular mobilisations and consequent political decisions against mining. I find that the culturally accepted term nutag, which means birthplace, homeland and country of origin, is the basic source of nationalist sentiments that resist mining. The term nutag has evolved from meaning one’s naturally related birthplace to referring also to the politically independent country of Mongolia. The ideas associated with the original meaning make such nationalist sentiments different from, and much broader than, the idea of controlling natural resources indicated by the term ‘resource nationalism’.
The Failure of Dilma Rousseff’s Developmentalist Experiment: A Class Analysis
Authors: Singer André 
Published: October 2019

There are various reasons for the dissolution of the productivist coalition and the formation of an antidevelopmentalist bourgeois united front during Dilma Rousseff’s first term. With the intention of accelerating the pace of Lulism, Rousseff actively opposed neoliberalism, but state intervention alienated the industrialists even though, paradoxically, it aimed to favor them. On a small scale, Rousseff’s developmentalist experiment may have followed in the footsteps that led to the 1964 military coup. Diferentes razões apontam para a dissolução da coalizão produtivista e a formação de uma frente única burguesa antidesenvolvimentista durante o primeiro mandato de Dilma Rousseff. Com a intenção de acelerar o passo do lulismo, Dilma se contrapôs ativamente ao neoliberalismo, mas a intervenção estatal alienou os industriais, apesar de, paradoxalmente, tentar favorecê-los. Em ponto pequeno, o ensaio desenvolvimentista de Dilma pode ter seguido as pegadas que resultou no golpe de 1964.
‘. . . and then no more kisses!’ Exploring patients’ experiences on multidrug-resistant bacterial microorganisms and hygiene measures in end-of-life care A mixed-methods study
Authors: Heckel Maria , Sturm Alexander , Stiel Stephanie , Ostgathe Christoph , Herbst Franziska A , Tiedtke Johanna , Adelhardt Thomas , Reichert Karen , Sieber Cornel 
Published: October 2019

Background: In end-of-life care hygiene, measures concerning multidrug-resistant bacterial microorganisms may contradict the palliative care approach of social inclusion and be burdensome for patients. Objectives: To integrate patients’ perspectives on handling multidrug-resistant bacterial microorganisms at their end of life, their quality of life, the impact of positive multidrug-resistant bacterial microorganisms’ diagnosis, protection and isolation measures on their well-being and patients’ wishes and needs regarding their care. Design: A mixed-methods convergent parallel design embedded quantitative data on the patients’ multidrug-resistant bacterial microorganisms’ trajectory and quality of life assessed by the Schedule for the Evaluation of Individual Quality of Life in qualitative data collection via interviews and focus groups. Data analysis was performed according to Grounded Theory and qualitative and quantitative results were interrelated. Setting/participants: Between March 2014 and September 2015 at two hospitals adult patients diagnosed with multidrug-resistant bacterial microorganisms and treated in a palliative care department or a geriatric ward were included in the sample group. Results: Patients in end-of-life and geriatric care reported emotional and social impact through multidrug-resistant bacterial microorganisms’ diagnosis itself, hygiene measures and lack of information. This impact affects aspects relevant to the patients’ quality of life. Patients’ wishes for comprehensive communication/information and reduction of social strain were identified from the focus group discussion. Conclusion: Patients would benefit from comprehensible information on multidrug-resistant bacterial microorganisms. Strategies minimizing social exclusion and emotional impact of multidrug-resistant bacterial microorganisms’ diagnosis in end-of-life care are needed as well as adaption or supplementation of standard multidrug-resistant bacterial microorganisms’ policies of hospitals.