Miracle-dz/UniFAR-FTUs huggingface dataset:
Numerical optimization of the magnet system for the Lorentz Force Velocimetry of electrolytes

Lorentz Force Velocimetry is a contactless method for the flow rate measurement of electrically conducting fluids. Thismethodisbasedontheinteractionofthefluidflowwiththetransversalpermanentmagneticfield. Theequalelectromagnetic force acts on the fluid and on the magnet system. The flow rate can be determined by measuring of this electromagnetic force. The magnet system has been optimized to achieve maximal sensitivity at a given magnet system weight. The sensitivity was defined as the ratio between the Lorentz force and the magnet system weight. The numerical model was developed using COMSOL Multiphysics. Validation and verification of the numerical model has been performed. The magnet system was optimized using the optimization toolbox in MATLAB.
Physical Modeling and Control of Low Temperature Combustion in Engines

The topic of this thesis is model-based control of two combustion engine concepts, Homogeneous Charge Compression Ignition (HCCI) and Partially Premixed Combustion (PPC), using physics-based models. The studied combustion concepts hold promise of reducing the emission levels and fuel consumption of internal combustion engines. A cycle-to-cycle model of HCCI, including heat losses to the cylinder wall, was derived. The continuous heat transfer between the cylinder wall and the gas in the cylinder was approximated by three heat transfer events during each cycle. This allowed the model to capture the main dynamics of the cylinder wall temperature while keeping the complexity of the resulting model at a tractable level. The model was used to derive model predictive controllers for the combustion phasing using the inlet air temperature and inlet valve closing timing as control signals. The resulting controllers were evaluated experimentally and achieved promising results in terms of set-point tracking and disturbance rejection. Additionally, the differences in performance between using a switched state feedback controller and a hybrid model predictive controller for controlling exhaust recompression HCCI were investigated. The dynamics of exhaust recompression HCCI vary significantly between certain operating points, and the model predictive controller produced smoother transients in both simulations and experiments. A continuous-time model of PPC was derived and implemented in the Modelica language. The model structure, a single-zone model, and implementation platform, JModelica.org, were chosen in order to allow for numerical optimization based on the model equations. The resulting framework allowed the calibration of the model parameters to be formulated as an optimization problem penalizing deviations between a measured pressure trace and that of the model. The calibrated model predicted the effects of variations in the injection timing with satisfactory accuracy.
EFEITOS DA ADOÇÃO DA IFRS 16 NOS INDICADORES DE DESEMPENHO DE ENTIDADES ARRENDATÁRIAS

Esta pesquisa buscou identificar quais foram os efeitos da adoção da IFRS 16 nas contas patrimoniais e nos indicadores de desempenho de entidades arrendatárias. Para tanto, analisaram-se as demonstrações financeiras do ano de 2016 de uma amostra de 46 companhias abertas brasileiras que continham arrendamento mercantil operacional no período. Foram identificados os valores de despesas futuras correspondentes aos arrendamentos mercantis operacionais e trazidos a valor presente pela taxa do IGP-M 7,19% acumulado em dezembro de 2016 e simulada a nova contabilização a partir do reconhecimento dos ativos, passivos e depreciação do período. Após a nova forma de contabilização foi feito um comparativo entre os indicadores de liquidez, endividamento e rentabilidade calculados antes e após a IFRS 16, aplicando-se o teste Wilcoxon-Mann-Whitney para verificar a diferença estatística entre os indicadores com a simulação dos dados. Os resultados da pesquisa evidenciaram que haverá um aumento significativo nas contas patrimoniais e uma redução no resultado, reduzindo indicadores de liquidez, de endividamento no curto prazo e de rentabilidade das arrendatárias, e um acréscimo significativo na estrutura de capital das empresas, concluindo que a mudança na contabilização dos arrendamentos irá impactar na percepção dos usuários da informação contábil quanto ao desempenho das entidades arrendatárias.
The Shift to Mobility in the BI Industry

There is an ongoing shift to mobility in business IT, as well as in the consumer space. Users do not demand mobile availability anymore, they simply expect the ability to access business IT with consumer devices. Stemming from this demand, mobile business intelligence (BI) has emerged as a response from the BI industry. Thus, mobile BI is an extension of traditional BI into mobile devices. In line with this, the purpose of the thesis is to explore how the BI industry is approaching the shift to mobility and how this shift shapes mobile BI. Starting in the litera-ture, we constructed a theoretical framework. This was then used for collecting data through interviews with a total of six vendors and consultants in the BI industry. We conclude that the BI industry has a reactive rather than proactive approach to the shift to mobility. BI consultants and vendors follow and adapt to consumer patterns and solutions in the consumer space. Like-wise, mobile BI is being shaped by well-established, proven design and technological solutions in the consumer space.
TURNING A NEGATIVE INTO A POSITIVE WITH MODERN ELECTRONIC TECHNOLOGIES

In today’s society, electronic devices represent an important part of the cultural fabric, especially for the younger generation. Professors and lecturers teaching at post-secondary levels express concern when students appear to be more interested in electronic devices than the content being presented in the classroom. These devices permit the student to locate small snippets of data and information leaving them largely incapable of integrating this data into comprehensive concepts. Another drawback of using modern electronic devices in the classroom relates to their misuse during examinations. The argument from an educator’s perspective is: suppression versus celebration, as electronic devices assume a ubiquitous place and role in the classroom. Unable to effectively compete with the apparent entertainment value of iPods, iPads, cell phones and laptops, educators and policy makers enact a range of measures designed to enforce student engagement during class time. Institutional responses to the use of electronic devices include: policy language enshrined in course outlines, bans on such devices and confiscation of offending devices. Conversely, given that every conceivable subject is available via the internet, these electronic tools are effective in ‘bringing the world into the classroom’. This paper explores and presents actionable strategies that educators can employ to leverage the power of electronic devices in stimulating students’ participation during classroom delivery. Based on literature search, personal experience and field interviews, suggested best practices are advanced for the enhancement of the learning environment (both lecture and lab) in the pursuit of improved learning outcomes. The paper will also present the limitations and drawbacks in the use of these devices.
Accurate characterization of some radiative EMC phenomena at chip level, using dedicated EMC-testchips

This paper focuses on the radiated EMC-behaviour of ICs and ASICs. An EMC testchip has been developed, encompassing some passive IC interconnection structures. Together with a dedicated EMC-testboard for mounting the IC, as well as a suited EMC measurement set-up, a configuration is obtained that enables one to perform an in-depth evaluation of some important EMC radiating mechanisms at chip level. The EMC-measurements have focused on the comparison between the radiation from IC-interconnects, and the radiation from well-known PCB-interconnects (such as microstrips). From this comparison, the authors observe that an on-chip interconnect may generate significantly more radiation (up to 20 dB for frequencies above 700 MHz) than a microstrip track of comparable length. Especially, packaging effects play a major role in this.
Simulation of a More-Electric Aircraft power system using an automated state model approach

A detailed system model for a More-Electric Aircraft power system equipped with a wound-rotor synchronous generator is presented. The simulation employs a new approach that automatically generates a state-space model of power components and the complete system. In this approach, the composite system state equations are established algorithmically given the standard node incidence matrix and elementary branch data (e.g. resistances, inductances, back emf's). The resulting state equations can be solved using a variety of numerical techniques or commercially available computer simulation programs. Example computer studies are presented and verified with experimental tests.
Application of lean scheduling and production control in non-repetitive manufacturing systems using intelligent agent decision support

Lean Manufacturing (LM) is widely accepted as a world-class manufacturing paradigm, its currency and superiority are manifested in numerous recent success stories. Most lean tools including Just-in-Time (JIT) were designed for repetitive serial production systems. This resulted in a substantial stream of research which dismissed a priori the suitability of LM for non-repetitive non-serial job-shops. The extension of LM into non-repetitive production systems is opposed on the basis of the sheer complexity of applying JIT pull production control in non-repetitive systems fabricating a high variety of products. However, the application of LM in job-shops is not unexplored. Studies proposing the extension of leanness into non-repetitive production systems have promoted the modification of pull control mechanisms or reconfiguration of job-shops into cellular manufacturing systems. This thesis sought to address the shortcomings of the aforementioned approaches. The contribution of this thesis to knowledge in the field of production and operations management is threefold: Firstly, a Multi-Agent System (MAS) is designed to directly apply pull production control to a good approximation of a real-life job-shop. The scale and complexity of the developed MAS prove that the application of pull production control in non-repetitive manufacturing systems is challenging, perplex and laborious. Secondly, the thesis examines three pull production control mechanisms namely, Kanban, Base Stock and Constant Work-in-Process (CONWIP) which it enhances so as to prevent system deadlocks, an issue largely unaddressed in the relevant literature. Having successfully tested the transferability of pull production control to non-repetitive manufacturing, the third contribution of this thesis is that it uses experimental and empirical data to examine the impact of pull production control on job-shop performance. The thesis identifies issues resulting from the application of pull control in job-shops which have implications for industry practice and concludes by outlining further research that can be undertaken in this direction.
A Novel User Interface for Musical Timbre Design

This thesis characterises and addresses problems and issues associated with the design of intuitive user interfaces for timbral control. The usability of a range of synthesis methods and representative implementations of these methods is assessed, and three interface architectures - fixed architecture, architecture specification and direct specification - are identified. The characteristics of each of these architectures, as well as problems of usability inherent to each of them are discussed; it is argued that none of them provide intuitive tools for the manipulation and control of timbre. The study examines the nature of timbre and the notion of timbre space; different kinds of timbre space are considered and criteria are proposed for the selection of suitable timbre spaces as vehicles for synthesis. A number of listening tests, designed to demonstrate the feasibility of subsequent work, were devised and carried out; the results of these tests provide evidence that, where Euclidean distances between sounds located in a given timbre space are reflected in perceptual distances, the ability of subjects to detect relative distances in different parts of the space varies with the perceptual granularity of the space. Three contrasting timbre spaces conforming to the proposed criteria for use in synthesis are constructed; the purpose of these spaces is to provide an environment for a novel user interaction approach for timbral design which incorporates a search strategy based on weighted centroid localization. Two prototypes which exemplify the proposed approach in alternative ways are designed, implemented and tested with potential users in order to validate the approach; a third contrasting prototype which represents a simple contrasting alternative is tested for purposes of comparison. The results of these tests are evaluated and discussed, and areas of further work identified.
A Simplified Model of Specific Absorption Rate Calculation for Laptop-Mounted Equipment in Near Proximity to Human Torso

Abstract A simplified model of specific absorption rate (SAR) calculation is proposed for laptop-mounted equipments in proximity to human torso, in which the equivalent models of liquid phantom and laptop are investigated and studied. By improving the liquid phantom based on transmission-line theory and perfect matching layer (PML), this proposed model can improve the simulation efficiency by at least 40% while the error is within 3%. Furthermore, the effects of laptop’s geometric and electric parameters on SAR are also evaluated combined with the phantom. The accuracy and efficiency of the simplified model are validated by calculating the SAR distribution of three kinds of practical data cards and comparing SEMCAD results with the measurement ones.
Evaluation in Europe: An Overview

The umbrella organization of evaluation in Europe is the European Evaluation Society (EES). Founded in 1994 in Hague (Netherlands), the EES elects presidents for two-year mandates and provides a central secretariat for two to three years in different locations. The EES welcomes all individuals interested in evaluation, professionally or academically. Members of the EES receive a Newsletter, a one year subscription to Evaluation: the International Journal of Theory, Research and Practice, and reductions on EES conference fees and other activities.
A study of volume and weight vs. frequency for high-frequency transformers

The relationship of the volume and the weight versus frequency for high-frequency transformers is studied. A complete analytical procedure taking into consideration core loss and winding loss (including eddy current loss) is developed. Analytical and experimental results reveal that higher frequency does result in smaller transformer design but an optimum frequency exists at which a transformer can be designed with the smallest volume and the lowest weight. <<ETX>>
Probabilistic seismic demand analysis of nonlinear structures

Recent earthquakes in California have initiated improvement in current design philosophy and at present the civil engineering community is working towards development of performance-based earthquake engineering of structures. The objective of this study is to develop efficient, but accurate procedures for probabilistic analysis of nonlinear seismic behavior of structures. The proposed procedures help the near-term development of seismic-building assessments which require an estimation of seismic demand at a given intensity level. We also develop procedures to estimate the probability of exceedance of any specified nonlinear response level due to future ground motions at a specific site. This is referred as Probabilistic Seismic Demand Analysis (PSDA). The latter procedure prepares the way for the next stage development of seismic assessment that consider the uncertainties in nonlinear response and capacity. The proposed procedures require structure-specific nonlinear analyses for a relatively small set of recorded accelerograms and (site-specific or USGS-map-like) seismic hazard analyses. We have addressed some of the important issues of nonlinear seismic demand analysis, which are selection of records for structural analysis, the number of records to be used, scaling of records, etc. Initially these issues are studied through nonlinear analysis of structures for a number of magnitude-distance bins of records. Subsequently we introduce regression analysis of response results against spectral acceleration, magnitude, duration, etc., which helps to resolve these issues more systematically. We illustrate the demand-hazard calculations through two major example problems: a 5story and a 20-story SMRF building. Several simple, but quite accurate closed-form solutions have also been proposed to expedite the demand-hazard calculations. We find that vector-valued (e.g., 2-D) PSDA estimates demand hazard more accurately. This procedure, however, requires information about 2-D seismic hazard which is a relatively new tool. We determine also the required number of analyses to estimate the seismic demand and demand-hazard with a certain accuracy. By considering different sources of uncertainties in those estimations we recommend a number of analyses so that the change in the total uncertainty due to limited number of analyses is within an acceptable limit. ed number of analyses is within an acceptable limit.
Impedance Matching andElectrode Structure Design for Wearable Transmitter in Intra-Body Transmission

人体内通信システムにおけるウェアラブル送信機に着目し，TLM（Transmission Line Matrix）法による電磁界解析および実験により，電磁界分布および送信機電極の入力インピーダンス特性を検討し，腕部モデルにより送信機電極の入力インピーダンス特性の評価が可能であることを示し，そのインピーダンス特性は，送信機の電極長および電極幅に反比例し，電極間隔に比例することを明らかにした。 解析結果から電極寸法に対する電極の入力インピーダンス特性の近似式を求め，腕時計サイズ（30 mm×30 mm）の送信機における電極設計を試みた。 電極長，電極幅，電極間隔がそれぞれ，11.2 mm，30 mm，7.6 mmの時に，変成器やスタブを用いることなく50 Ω系の電極が得られ，この電極の採用により，送受信機間の伝送特性が2～12 dB改善することを確認し，電極設計における近似式の有効性を示した。
Design of Unsymmetrical Doherty Power Amplifier for 460MHz LTE-Advanced Applications

An unsymmetrical Doherty power amplifier (DPA) at 460MHz is presented in this paper. The carrier and peaking amplifier of the DPA, which base on two equal-sized devices, are matched with different networks to mitigate the performance degradation caused by the limited load modulation. Measured with continuous wave (CW), the unsymmetrical DPA saturates at an output power of 49.2dBm and achieves a drain efficiency of 51% at 6dB back-off. Using a one-carrier long term evolution advanced (LTE-Advanced) signal with 20MHz bandwidth, the unsymmetrical DPA exhibits a drain efficiency of 48.7% at an average output power of 42.1dBm, along with adjacent channel leakage ratio (ACLR) of-34.1dBc and-53.3dBc before and after digital pre-distortion (DPD), respectively.
A problemática da expatriação na gestão internacional de recursos humanos: estudos aplicados em PME do centro e norte de Portugal

A gestão de recursos humanos, associada a processos iniciais ou de aprofundamento de internacionalização de empresas, está cada vez mais presente nas agendas das empresas nacionais, em virtude da necessidade crescente de internacionalização da economia portuguesa. Este artigo revê a literatura nacional e internacional sobre a gestão de recursos humanos na perspectiva da internacionalização, constituindo assim um contributo teórico para esta área de investigação. Além disso, apresenta os resultados de um trabalho empírico, baseado em entrevistas e questionários a chefias e colaboradores, que resultaram do estudo de duas empresas portuguesas, cujo objetivo foi analisar a sensibilidade destas para o processo de expatriação e repatriação dos seus colaboradores. Constatou-se nas duas empresas haver desenvolvimentos eficazes na expatriação, evidenciados pelo acompanhamento dos colaboradores e familiares, mas ainda se continua a descuidar da formação e a avaliação de desempenho que, por vezes, não reproduz o trabalho desenvolvido pelos expatriados. Perante a repatriação, as empresas também não pensam de forma estruturada no cargo a atribuir ao colaborador após seu retorno
Driver models in automobile dynamics application

Understanding the driver of an automobile has been attractive to researchers from many different disciplines for more than half a century. On the basis of their acquirements, models of the (human) driver have been developed to better understand, analyse and improve the combined couple of driver and automobile. Due to distinctive demands on the models in accordance with different kinds of applications, a variety of driver models is available. An overview of driver models is given with respect to their application and different methodical modelling approaches. The emphasis is put on the interest of engineers, who generally focus on the automobile (like design and optimization of vehicle components and the overall vehicle dynamics behaviour) by applying their approved (mathematical) methods. Nonetheless, a brief look beyond is added to better complete the view on the involved task of driving and driver modelling for automobile dynamics application.
A Sightseeing Spot Recommendation System for Urban Smart Tourism Based on Users’ Priority Conditions

: The present study aimed to design, develop, operate and evaluate a sightseeing spot recommendation system as a smart tourism tool that gathers and accumulates sightseeing spot information and considers personal preferences as well as priority conditions to support tourism activities, especially in urban tourist areas. The system was developed by integrating web-geographic information systems (Web-GIS), the recommendation system and the evaluation system. Additionally, the system was operated for 4 weeks in the central part of Yokohama City in Kanagawa Prefecture, Japan, and the total number of users was 62. Based on the results of the web questionnaire survey, the system was highly useful for sightseeing activities, and further utilization of each function can be expected by continuing the operation. From the results of access analysis of users’ log data, it is evident that the system has been used by different types of information terminals just as it was designed for, and that the system has been used according to the purpose of the present study, which is to support the sightseeing activities of users. However, the number of visits to pages related to the evaluation function of sightseeing spots and submitting function of new sightseeing spot information was low. This may improve if the system operation is conducted on a long-term basis.
Purification and Concentration of C-Phycocyanin from Spirulinaplatensis Using Aqueous Two-Phase System

In this article, the partitioning behavior of C-phycocyanin (C-PC) in aqueous two-phase systems (ATPS) with different component was investigated to evaluate the applicability of ATPS for extracting high purity of C-PC without chromatography. Under the optimized conditions (pH = 6; PEG-2000, 16 %, w/w; potassium sodium tartrate 21 %, w/w), a maximum purity of 5.01 was achieved after the whole separation process and the yield of the C-PC was 76.94 %.
Realistic multispectral simulation including IR simulation

Both industrials and French government services are inclined to using realistic sensor simulation models in the specification, the conception and the qualification of the weapon systems. When considering the development of multi mode weapon systems, that offer enhanced capabilities, an important new domain in the field of sensor simulation is the multi spectral one, especially for infrared, millimetric radar and acoustic spectrums. CHORALE will precisely be a simulation tool for modeling the battlefield `seen' by an infrared, millimetric radar and acoustic sensor. It fulfills the requirements for a realistic infrared simulation. It will then evolve to millimeter radar and acoustic spectrum (which doesn't concern this paper's topic).