Miracle-dz/UniFAR-FTUs huggingface dataset:
Improved low voltage grid-integration of photovoltaic systems in Germany

Abstract form only given. This work discusses the technical and economical benefits of different active and reactive power control strategies for grid-connected photovoltaic systems in Germany. The aim of these control strategies is to limit the voltage rise, caused by a high local photovoltaic power feed-in and hence allow additional photovoltaic capacity to be connected to the mains. Autonomous inverter control strategies, which do not require any kind of data communication between the inverter and its environment, as well as an on-load tap changer for distribution transformers is investigated. The technical and economical assessment of these strategies is derived from 12 month RMS simulations, which are based on a real low voltage grid and measured DC power generation values. The results show that the provision of reactive power is an especially effective way to increase the hosting capacity of a low voltage grid for photovoltaic systems.
Entrepreneurship education: a review of its objectives, teaching methods, and impact indicators

Purpose – This paper aims to take stock of existing publications devoted to entrepreneurship education and assess the alignment existing between its generic objectives, target audience, teaching methods and impact indicators.Design/methodology/approach – A semi‐systematic literature review is applied; using six thematically separated excel data collection spreadsheets. Datasheets were used in order to reduce the author's bias. A total of 108 articles are reviewed in stages and by categorizing in terms of educational objectives, target audiences, community outreach activities, applied teaching methods and impact indicators.Findings – Scholars in this field of study, though differing in a number of definitive issues, are converging towards a single framework of entrepreneurship education. There is a shift from a start‐up view to an attitude‐changing perspective of entrepreneurship education. However, with a diversity of target groups, there is still a non‐alignment between what educators and other stakehold.
PERSONAL AND ORGANIZATIONAL STRATEGIES FOR HANDLING JOB STRESS: A REVIEW OF RESEARCH AND OPINION

The medical and psychological literature pertaining to personal and organizational strategies for handling Job stress is reviewed. The paucity of research in this domain is emphasized as is the lack of involvement by industrial/organizational psychologists. Many strategies for managing job stress exist but their effectiveness has not been evaluated. It is important that such strategies receive the immediate, scientific attention of I/O psychologists. Issues that must be faced before significant progress can be achieved are discussed.
Generational differences in work values, outcomes and person‐organisation values fit

Purpose – The purpose of this paper is to investigate differences between three generational groups currently in the workforce (Baby Boomers, Generation X, and Generation Y), in work values, job satisfaction, affective organisational commitment and intentions to leave. The study also seeks to examine generational differences in person‐organisation values fit.Design/methodology/approach – A total of 504 Auckland employees representing a range of industries completed an online questionnaire. Generation X (57 per cent) was defined as those born between 1962‐1979, Baby Boomers (23 per cent) were born 1946‐1961 and Generation Y (17 per cent) were born 1980‐2000. The remainder (3 per cent) were born 1925‐1945.Findings – The youngest groups placed more importance on status and freedom work values than the oldest group. Baby Boomers reported better person‐organisation values fit with extrinsic values and status values than Generation X and Generation Y but there were no other generational differences in fit. Wher.
INOVAÇÕES DE PRODUTO E SEUS IMPACTOSSOBRE A DISTRIBUIÇÃO SETORIAL FUNCIONAL DA RENDA

The broader purpose of the paper is to understand the influences of technological advances achieved by the introduction of successful innovations by firms over the competitive process on the market power of functional sectoral distribution of income. This objective is defined in the light of distributive Kaleckian theory according to which the determination of the functional distribution of income is closely linked to the process of price formation in markets governed by mark-up pricing. To achieve this goal a theoretical model capable of simulating the interactions between different firms within specific sectors is developed with a modeling method based on agents Agent-Based Modelling (ABM). The main conclusion drawn from this work is that the results obtained from the simulations corroborate the Kaleckian theory of distribution. Therefore, the technological innovative process, by influencing price and mark-up, directly affect the distribution of income. The strategy of innovative search intensive in product innovation increases the market power of innovating firms, since to make possible competition for higher quality products allows firms to increase prices without sacrificing market share. Palavras-chave: Inovação de produto; Distribuição setorial funcional da renda, Dinâmica microeconômica, Modelo setorial de simulação. Keyword: Product Innovation; Functional sectoral distribution of income; Microeconomics Dynamic; Sectoral Model of Simulation.
TravelDashboard: Personalized Mobility to Urban Travelers

1. April 29, 2013: A Team of researchers from Inria involved with TravelDashboard were awarded €2500 for the "mashup prize" as part of the OpenDataLab event of RATP , the Paris transport company, for their app "NeverBLate" 2. April 02, 2013: ERCIM News, Special theme: Mobile Computing contains the article "Tr avelDashboard a Framework for the Delivery of Personalized Mobility Services to Urban Travellers" by project partners
Practical ReProCS for separating sparse and low-dimensional signal sequences from their sum — Part 2

In this work, we experimentally evaluate and verify model assumptions for our recently proposed algorithm (practical ReProCS) for recovering a time sequence of sparse vectors St and a time sequence of dense vectors Lt from their sum, Mt := St + Lt, when Lt lies in a slowly changing low-dimensional subspace. A key application where this problem occurs is in video layering where the goal is to separate a video sequence into a slowly changing background sequence and a sparse foreground sequence that consists of one or more moving regions/objects. Practical-ReProCS is the practical analog of its theoretical counterpart that was studied in our recent work.
Laboratorios Syva: valoración de Gonasyl en protocolos de inseminación a tiempo fijo

En este artículo se valora la idoneidad de la gonadorelina acetato (Gonasyl), tanto desde el punto de vista molecular como práctico, y se expone la realización de varias pruebas de campo para contrastar la eficacia del producto en distintos protocolos de sincronización de celo en ganado vacuno lechero. En el ganado vacuno lechero la ineficiencia reproductiva continúa siendo uno de los factores limitantes de la rentabilidad y la sostenibilidad de las explotaciones. En las últimas décadas se han logrado importantes avances en el uso de las técnicas de inseminación artificial a tiempo fijo (IATF), como ov-synch y sus derivaciones, para mejorar las tasas de concepción. Un aspecto clave en el desarrollo de estos protocolos de sincronización es la relación positiva entre los niveles de progesterona circulante (P4) en el momento de la inyección con prostaglandinas y la fertilidad obtenida. De esta forma, protocolos que promuevan la formación de un cuerpo lúteo accesorio tendrán mayores niveles de P4 y, por consiguiente, mejores tasas de fertilidad; un ejemplo claro serían las estrategias doble ov-synch o G6G que van encaminadas a compensar el déficit de progesterona en vacas lactantes. El uso de una hormona sintética análoga a la hormona liberadora de gonadotropinas (GnRH) se ha convertido en una herramienta indispensable para los especialistas en reproducción bovina, por lo que ha de ser un producto de contrastada eficacia y seguridad.
Performance comparison of adaptive algorithms for non-linear channel equalizer

In this paper idea of adaptive channel equalization is discussed to deal with the problem of degrading effects of transmission channel. The use of equalization and adaptive signal processing finds a major role in today's communication system models. The time varying characteristics of non-linear communication channel causes different problems such as inter-symbol interference and multi-path propagation which restricts higher data rate transmission systems. To overcome the effect of non linear behavior of channel, number of algorithms have been proposed in the last two decade, such as least mean square (LMS), recursive least square (RLS) and normalized least mean square (NLMS). For all of these algorithms a technical review has been done based on mean square error and probability of error. Result shows that the RLS algorithm outperformed LMS and NLMS algorithm for channel equalization problem.
A novel 116 dB operational amplifier design using positive feedback

A gain boosted operational amplifier designed using positive feedback technique is presented in this paper. In this design, a differential output differential amplifier merged with a single output differential amplifier is used so that positive feedback can be applied appropriately. The proposed Op-Amp is designed in 0. 18µm CMOS process using gpdk45nm library in Cadence virtuoso analog design environment. The simulation of proposed circuit results in 116.2dB gain, 281MHz UGB, 72 degree phase margin and 620µW power consumption. The Monte Carlo analysis of the circuit indicates that the variation of power supply voltage produces minimal effect on the gain and phase of the circuit.
An adaptive hello process for overhead reduction in MANETs

In mobile ad hoc network (MANET) for effective routing neighbor discovery and route maintenance is an important process. Neighbor discovery used to find the neighbor nodes inside the coverage region of active nodes. It is initialized by every node which exists in the network. Normally neighbor nodes are discovered by HELLO protocol. In self organizing wireless network HELLO protocol is very important. Additional packets in the network result in routing overhead, which is necessary for a proper session, but decreases the performance of the routing protocol. We focus on reducing the overhead to improve the protocol performance. In the existing hello process, all the nodes exchange hello packets with their neighbors with a fixed interval. Due to the uncertainty and irregularity of the mobile network parameters, the interval of hello packet emission should be determined dynamically. Our proposed hello process allows only the members of the active route and their neighbors to exchange hello packets. The interval of hello packet transmission is computed by each node, independent of others, based on the current number of neighbor table entries. The simulation is done in ns2.34 and Ad Hoc On-Demand Distance Vector (AODV) routing protocol is used for the implementation of the proposed scheme. The routing overheads obtained by the proposed and existing hello processes are compared to show a high reduction in routing overhead by the proposed one.
Energy optimized data routing in wireless Sensor Network

The energy supply of nodes will be limited strictly in the wireless sensor networks (WSN). Many algorithms propose to increase the efficiency of Sensor Networks. Many Clustering protocols have been proposed to improve system throughput and system delay, and increase energy saving. Based on the LEACH (Low Energy Adaptive Clustering Hierarchy), this paper uses a deterministic approach. It takes into consideration of many factors such as current energy of sensor node, percentage of nodes that not have been selected as Cluster Heads (CHs) in each round due to location reason. The proposed protocol is simulated and the results show a significant reduction in network energy consumption compared to LEACH and other algorithms.
Cellular technologies: A journey towards 5G

5G is an incremental advance on 4G. The previous four generations of cellular technology have each been a major paradigm shift that has broken backward compatibility. However, unlike the previous four generations, it will also be highly integrative providing universal high-rate coverage and a seamless user experience. To support this, the core network will also have to reach new levels of flexibility and intelligence, spectrum regulation will need to be rethought and improved, and energy and cost efficiencies will become even more critical considerations. In this paper the key challenges for future research and 5G standardization activities are discussed, providing overview of the current literature.
Real time voltage sag mitigation: New topologie

Power Quality is simply the interaction of electrical power with electrical equipment. In recent years power quality (PQ) has become a major concern to both power utilities and power customers, due to the complexity of modern power system. Occurrences of faults and frequency of normal switching actions is increasing day by day. The faults and switching actions often produces disturbances which can give rise to equipment damage, failure, malfunction and degradation of electric power quality. Mitigation of voltage sag is carried out using dedicated experimental set up in laboratory with various topologies of static var compensator (SVC) and booster transformer. The results of these topologies are presented in this work. The switching events like change of transformer taps, starting of induction motor are used to create the voltage sag. These events are controlled through FPGA based algorithm. Fuzzy logic controller is designed to achieve the firing angles for SVC which maintains voltage profile.
Cognitive modelling of design practice

This paper presents the cognitive modeling of design practice applied to pico- turbine through parameter analysis methodology. For this prior knowledge regarding cognitive modeling in real practice is crucial. In reality as design practice is seldom a nonlinear issue, no question of any creativity and innovativeness in designing practice arise. In the engineering practice a standard cognitive model which establishes a suitable cognizable process of cognitive modeling for design practices is necessary for understanding the design process. Further, this cognitive modeling process is applied to a case study of designing pico-turbine. So, a final systematic design pertaining to cognitive modeling is highlighted.
Particle Swarm Optimization Versus Genetic algorithm for an adaptive uniform circular array

This paper focuses on comparison of Particle Swarm Optimization (PSO) and Genetic Algorithms (GA) that are applied to obtain beam forming of an adaptive Uniform Circular Array (UCA). UCA geometry is targeted because of its symmetry in configuration which enables the adaptive array to scan azimuthally with minimum changes in its beam width and side lobe levels. PSO and GA are used to calculate the complex weights of the antenna elements in order to adapt the antenna to the changing environment. Comparisons are made in the context of performance of PSO and GA algorithms.PSO is less complex and has a very fast convergence over GA. The Particle Swarm Optimizer shares the ability of GA to handle arbitrary cost functions but with much simple implementation it clearly demonstrates better possibilities for its wide use in electromagnetic optimization.
Comparative analysis of P&O and INC MPPT algorithm for PV system

Compared to the Non-conversion energy resources, the photovoltaic (PV) system that is uses the solar energy to produce electricity it is one of renewable energy source. It has a great potential and developing fast compared to other renewable energies. This system can be either stand-alone or connected to utility grid. The disadvantage of this PV generation depended on atmospheric conditions such as solar irradiance and temperature. Maximum power point trackers (MPPTs) play an important role in photovoltaic (PV) power systems because it is maximize the output power of a PV system for a given atmospheric conditions so it is maximize the PV array efficiency. MPPT is maintaining operating point at the maximum power point using a different MPPT algorithm. MPPT can minimize the overall photovoltaic (PV) system cost. For maximize the output of a PV system, continuously tracking the maximum power point (MPP) is necessary.
Reconfigurable Parallel Architecture of High Speed Round Robin Arbiter

With a view to managing the increasing traffic in computer networks, round robin arbiter has been proposed to work with packet switching system to have increased speed in providing access and scheduling. Round robin arbiter is a doorway to a particular bus based on request along with equal priority and gives turns to devices connected to it in a cyclic order. Considering the rapid growth in computer networking and the emergence of computer automation which will need much more access to the existing limited resources, this paper emphasizes on designing a reconfigurable round robin arbiter over FPGA which takes parallel requests and processes them with high efficiency and less delay than existing designs. Proposed round robin arbiter encounters with 4 to 12 devices. Results show that with 200% increment in the number of connected devices, only 2.69% increment has been found in the delay. With less delay, proposed round robin arbiter exhibits high speed performance with higher traffic, which is a new feature in comparison with the existing designs.
A comprehensive review on modeling, control, protection and future prospects of Microgrid

Imminent constraints such as sky rocketing energy costs and need for expansion of generation & distribution systems attributable to increase in demand of power has led to revolution in generation system and evolution of Microgrid concept. Various operating principles and configuration of Microgrid are discussed in this paper focusing its operation in grid tied as well standalone operation mode. Possible controlling schemes and protection strategies are also suggested in this paper keeping in mind expected future prospects and challenges that can come in way while interfacing Microgrid with the main utility grid.
Comparison of different DC-DC converter for MPPT application of photovoltaic system

A DC-DC converter is an important constituent of a photovoltaic(PV) power system. Power generated by the PV system is a function of solar insolation, and temperature. Power-voltage (P-V) characteristic of a PV module exhibits a single power peak. A maximum power point tracking algorithm is required to operate the PV array at its maximum power point. The DC-DC converter works as an impedance matching circuit in between the PV array and load. A suitable selection of DC-DC converter is an important decision according to the application. In this study, a comparative analysis of different DC-DC converter is discussed in terms of efficiency, computational time, and complexity. A widely adopted Incremental conductance (INC) MPPT algorithm is used to evaluate the performance of each DC-DC converter. Performance of each converter in MPPT application is simulated using MATLAB/SIMULINK
Three phase grid connected photovoltaic generation system evaluation and comparison using Perturb (P) and Observe (O) maximum power point tracking technique

The essence of switching from non conventional power generation system to conventional generation system has become inevitable due to emergence of constraints such as adverse environmental effects like global warming and depletion in conventional fuel like fossil fuels. The trend of power generation from renewable sources is gaining importance due to clean and inexhaustible properties. Amidst various natural resources, photovoltaic generation system is at priority. But, intermittent climatic variation affect the photovoltaic generation which headed to introduction of maximum power point tracking technique. This paper explicates mathematical modelling of photovoltaic system, implementation of Perturb and Observe maximum power point tracking technique for three phase grid connected photovoltaic generation system and comparison of current, voltage and power generated from photovoltaic system with and without perturb and observe maximum power point tracking technique.
A comparative study of topology enabled and topology hiding multipath routing protocols in MANETs

In the past few years, we have seen a rapid expansion in the area of mobile ad hoc networks due to the rapid increase in the number of inexpensive and widely available wireless devices. This type of network, operating as a stand-alone network or with one or multiple points of attachment to cellular networks paves the way for numerous new and exciting applications. MANETs are characterized by a multi-hop network topology that can change frequently due to mobility, efficient routing protocols are needed to establish communication paths between nodes. It is very important that the routing protocol used must provide a well secure routing architecture and should not provide single bit of loop holes. This is pointing towards the topology exposure problem of existing routing protocols and tells about the need of topology hiding. Routing security is one of the hottest research areas in MANET currently. This paper provides insight into a comparative study of well known AOMDV routing protocol with a topology hiding multipath protocol and the need of hiding topology information within the protocol to resist various kinds of attacks such as blackhole attack, Sybil attack and warmhole attack. This paper also discusses the technological challenges that protocol designers and network developers are faced with.
Full bridge converter with asymmetric PWM for high step-up application

This paper introduces a full bridge converter with high step-up voltage gain, which is achieved by using asymmetric pulse width modulation. The soft switching is obtained for the converter with zero-voltage switching across the active switches and the zero-current switching across the output diodes. The zero-voltage switching of the active switches are obtained during turn-on and the zero-current switching of the output diodes are obtained during turn-off. The converter is able to achieve high step-up voltage gain by using relatively less transformer turns ratio. Various simulation results using MATLAB SIMULINK is provided to understand the effectiveness of the circuit.
Modelling and analyzing effects of phase noise in orthogonal frequency division multiplexing

Orthogonal frequency division multiplexing (OFDM) is being successfully used in numerous applications. OFDM technique is widely used due to its high spectrum efficiency. Fast Fourier Transforms (FFT) has been used to produce the orthogonal sub-carriers. It was chosen for IEEE 802.11a wireless local area network standard, and it is being considered for the fourth-generation mobile communication systems. In OFDM transmission schemes, the phase noise from oscillator instabilities in the receiver is a potentially serious problem. This paper presents simulation of OFDM transmission scheme & investigation of phase effects under a variety of channel conditions covering both indoor and outdoor environments. The bit error rate (BER) performance plots of the OFDM system affected by errors as function of 3-dB bandwidth of phase noise under different channel conditions were obtained through simulations.