Miracle-dz/UniFAR-FTUs huggingface dataset:
Laboratorio móvil tecno educativo: cursos de robótica de bajo costo para la alfabetización científica y tecnológica

The robotics in education is a multidisciplinary branch of the engineering that has been an invaluable asset to promote the science and the technology as something fun. However, the high costs for the implementation as also the difficulty to train instructors have made the robotics more common only in first world countries, because generally they have more educational budget for this practices. For this reason the Educational Techno Mobile Lab was created; this Lab incorporates robotics courses based on BEAM robots and also sciences and cognitive practices. The objective of the Project is to create a new concept of learning based on a techno educative platform with the finality to promote the scientific and technological literacy to the development of knowledge and critical scientific thinking. The results of the evaluation present a 36% of improvement related science and technology knowledge on fourth grade students; these results show the necessity to incorporate a given robotic course to all the public education level.
Graphene vs Activated Carbon in Supercapacitors

Four graphene materials and four activated carbons from various producers as well as carbon black from Cabot company and compositions of all these materials are tested as electrodes of electrochemical double layer capacitors (EDLC). As revealed, the specific capacitance of graphene-based electrodes and capacitance retention with an increase in current are inferior to the values, which can be achieved with the best activated carbons specially developed for the EDLC application. Fairly good correlation between the surface area and the electrostatic capacitance of electrode materials is revealed resulting in the capacitance of electric double layer of graphene, graphene-containing and activated carbon materials tested in this work to be close to 0.052 F/m 2 .
The VST-VLT survey telescope

We describe the telescope concept of the VST-the VLT survey telescope-and the scientific and instrumental background which lead to the kick-off of the project for the realization of a 2.6 m telescope for wide field imaging in the optical and infrared to be placed at Paranal, on the VLT plateau within the year 2001. The project for the camera and the data handling and archiving, plus the analysis pipeline are outlined, with particular emphasis on the possible scientific surveys and stand alone projects. We will briefly review some of the scientific projects for which the VST was conceived, and its impact on the VLT science.
Korroosio ja sähköinen korroosion esto

Tampereen ammattikorkeakoulu Tampere University of Applied Sciences Degree programme in Chemical Engineering Option of Chemical Engineering SAINIO, NIKO Corrosion and Electric Corrosion Protection Bachelor's thesis 40 pages, appendices 0 pages April 2012 This thesis is literature work about corrosion and corrosion prevention with electric methods. Subject for my thesis was offered by my institution. Purpose is to research corrosion, corrosion types, protection methods and applications by using bibliographic knowledge. In my work I proceeded information about effects and consequences of corrosion, theory behind it, reasons and consequences of different corrosion types and mainly implementation, theory, common uses and electrical protection applications. There are plenty information about corrosion in written works, so lack of knowledge about this subject wasn’t an obstacle. Corrosion in itself thus is very complex process which describing would be time consuming so I will present the subject rather superficially in my thesis.
Predictions of Indigenous Chicken Phenotypes from Genotypes: Comparison Between Machine Learning and conventional Linear Models

Genomic selection is a new breeding strategy which is rapidly becoming the method of choice of selection. It is useful in predicting the phenotypes of quantitative traits based on genome-wide markers of genotypes using conventional predictive models such as ridge regression BLUP. However, these conventional predictive models are faced with a statistical challenge related to the high dimensionality of marker data, inter and intra-allelic interactions and typically make strong assumptions. Machine learning models can be used as an alternative in the prediction of phenotypes due to their ability to address this challenges. Therefore, the aim of this study was to compare the predictive ability of machine learning using deep convolutional neural network (DeepGS), conventional neural network (Artificial neural network), conventional statistical predictive model ridge regression best linear unbiased (RR-BLUP) model and combination of DeepGS and RR-BLUP(Ensemble model) in predicting body weight (BW) of indigenous chicken based on genome-wide markers. The pearson correlation coefficient (PCC) results from this study for the four models were 0.891,0.889, 0.892 and 0.812 for DeepGS, RR-BLUP, Ensemble and ANN. This showed that DeepGS did not yield significant difference (p>0.05) from the other models, therefore, it can be used in complement to the commonly used conventional models. For individuals with higher phenotypic values, the PCC results showed a drastic decrease in the performance of DeepGS, rrBLUP, Ensemble and ANN from 0.891, 0.889, 0.892, 0.845 to 0.315, 0.466, 0.342, 0.518 respectively. Therefore, more effort should be put on individuals with higher phenotypic values.
A New Kind of Channel-"Tidal Reversible Channel": Primary Design and Feasibility Analysis

A new kind of traffic separation mode for the two-way channel was proposed primarily by extending the channel to left for the heavy traffic side during the peak period, forming a new kind of channel--Tidal Reversible Channel. This method can improve the general navigation efficiency and meet the navigation demands of both sides of the channel at the same time. The two key points of the reversible channel which are the operation occasion and the reversible width of the channel, called Dynamic Time and Dynamic Zone, were discussed, also their further research directions. Then, the feasibility of the new channel was verified by two different design ships in Yangtze River Estuary Deep-Water Channel, indicating that the reversible channel will have wide study and application prospect.
Microwave Inverse Scattering: Quantitative Reconstruction of Complex Permittivity for Different Applications

This paper deals with two different quantitative inversion algorithms for reconstructing the complex permittivity profile of bounded inhomogeneous objects from measured scattered field data. The first algorithm involves an imaging method with single frequency excitation and multiincidence illumination and the second algorithm involves a method with synthetic pulse (multifrequency mode) excitation for objects surrounded by freespace or buried in stratified half-space media. Transmission or reflection imaging protocols are considered depending on aimed applications: microwave imaging in free-space from far-field data for target identification, microwave imaging from near-field data for nondestructive testing (NDT), microwave tomography of buried objects for mine detection and localization, civil engineering and geophysical applications. And Edge-Preserving regularization scheme leading to a significant enhancement in the image reconstructions is also proposed. The methods are illustrated with synthetic and experimental data.
A micromechanical silicon oscillating accelerometer

Abstract : This thesis describes the design and testing of a silicon oscillating accelerometer (SOA). The SOA is a silicon, micromechanical, oscillating beam accelerometer. The accelerometer is configured with two silicon tuning fork oscillators that are electrostatically driven and sensed in their out of phase vibrational resonance. The oscillators move on flexure beams which are configured to have one end anchored and the other end fixed to a shared seismic mass. When the seismic mass experiences an input acceleration, one oscillator's vibrating beams are loaded in tension while the other oscillator's beams are loaded in compression. This loading causes an increase and decrease in the respective oscillator's natural frequency. This change in frequency is proportional to the input acceleration. Automatic gain control electronics regulate the oscillation amplitude at resonance. The two oscillator's frequency outputs are differenced to exploit common mode error rejection. The SOA has been fabricated from single crystal silicon using a bulk dissolved wafer on glass micromachining process. It is vacuum packaged in a leadless ceramic chip carrier to achieve high quality factor and thus a sharp resonance. Results of both closed form and finite element analyses are described and are in good agreement Sensors were fabricated and experimental data including quality factor, input acceleration sensitivity or scale factor, and oscillator temperature sensitivity results are presented. An oscillator frequency of 27 kHz, a Q factor over 100,000, a scale factor of 4 Hz per g, and an oscillator temperature sensitivity of 0.4 Hz per degree Celsius have been achieved. The experimental data is shown to be in agreement with analysis results.
Effect of component layout and geometry on the flow distribution in electronics circuit packs

An experiment conducted in a water tunnel using aluminium blocks to simulate various electronic components is discussed. The experiments were conducted for laminar and onset of transition Reynolds numbers. Diluted ink was used as the flow visualization vehicle. Flow over a single component, multiple components, and fully loaded circuit packs was studied. The flows were found to be highly three-dimensional, and it is concluded that the the location and orientation of components with large aspect ratio will significantly affect circuit pack flow distribution. <<ETX>>
DeltaBot: A New Cable-Based Ultra High Speed Robot

The growing needs for high speed positioning devices in the automated manufacturing industry have been challenged by robotic science for more than two decades. Parallel manipulators have been widely used for this purpose due to their advantage of lower moving inertia over the conventional serial manipulators. Cable actuated parallel robots were introduced in 1980’s to reduce the moving inertia even further. In this work, a new cable-based parallel robot is introduced. For this robot, the cables are used not only to actuate the end-effector but also to apply the necessary kinematic constraints to provide three pure translational degrees of freedom. In order to maintain tension in the cables, a passive air cylinder is used to push the end-effector against the stationary platform. In addition to low moving inertia, the new design benefits from simplicity and low manufacturing cost by eliminating joints from the robot’s mechanism. The design procedure and the results of experiments will be discussed in the following.Copyright © 2003 by ASME
Piezoelectrically pumped parametric amplification and Q enhancement in an electromechanical oscillator

The frequency response of an electromechanical oscillator was measured while being parametrically pumped by double frequency modulations to the effective spring constant via the piezoelectric effect. A 13dB gain in the resonance amplitude was observed by increasing the pump power where further increase was limited by parametric excitation of the fundamental mode. Concurrently, the coherent amplification resulted in the quality factor of the resonance also being enhanced by ∼2.5 times. The on-chip degenerate piezoelectric parametric amplification demonstrated here could be implemented in nanoelectromechanical oscillators to bypass the detrimental effects of size minimization.
Biodiesel Fuel Specifications: A Review

This article is a literature review on biodiesel fuel specifications. Various methods were also studied by researchers in the production of biodiesel. The study is focused on the fuel specifications of alkali catalyst transesterified biodiesels from different raw materials, and it is based on the reports of more than 60 scientists who published their results previously. Studies are continuing to find out the best quality esters under different transesterification circumstances. Changing the production conditions makes the fuel specification results variable. While production, performance, and emission study reviews are available in the literature, there is no review on biodiesel fuel specifications based on detailed raw materials. It is thought that a literature review on fuel specifications will make a contribution to the literature on alkali-transesterified biodiesel fuels of different raw materials. Fuel specifications that are commonly concluded, such as density, viscosity, cetane number, cold flow properties, flash point, and calorific value, were examined and reviewed from published articles. It is also found that more than 85% of published papers don't include extensive fuel quality reports according to ASTM 6751 and EN 14214.
Planning robot motions in the presence of uncertainty

This thesis introduces a method for coping with uncertain phenomena in robotic systems. In the probabilistic framework that we introduce, we want to define methods for planning robotic motions so that the robotic system achieves favorable performance despite the inevitable presence of uncertainties. In order to develop these methods, we need a detailed understanding of the sources of random phenomena in the system, as well as comprehensive mathematical models of those phenomena. That understanding can lead us to a mathematically tractable formulation of motion planning in the form of a constrained optimization problem. We present a new method for modeling uncertainties that exist in a robotic system, based on stochastic differential equations. The benefit of using such a model is that we are then able to capture in an analytic structure three key points underlying robot motion: (1) the ability to properly express uncertainty within the motion descriptions, (2) the dynamic, changing nature of the task and its constraints, and (3) the idea of establishing a probability-based performance criterion whose optimization results in trajectories that exhibit some favorable characteristics.
Analysis, design and control of single-phase three-level power factor correction rectifier fed switched reluctance motor drive

In this study, a single-phase three-level power factor correction (PFC) rectifier fed switched reluctance motor (SRM) drive is proposed for improving the power quality at ac mains. The asymmetry in the dc-link capacitors voltages of the midpoint converter fed SRM drive is improved by using a single-phase three-level PFC rectifier. This PFC rectifier configuration uses two active semiconductor switches, an inductor and operates as a boost PFC rectifier. The proposed single-phase three-level PFC rectifier fed SRM drive is designed, modelled and its performance is simulated in MATLAB/Simulink. The simulated performance of the proposed single-phase three-level PFC rectifier fed SRM drive is experimentally validated for dc-link capacitors voltage balancing and power quality improvement.
Fundamental research challenges for active management of distribution networks with high levels of renewable generation

This paper is concerned with critically evaluating existing and emerging active management concepts and defining the contributions that ongoing and future research activities can bring in supporting the implementation of active management in distribution networks. These aims are achieved by defining and then extrapolating from current understanding of active network management. The key contributions from completed and ongoing projects in the field are clearly presented. In addition, the gap is assessed between what is achievable with existing and emerging active management solutions and what is required from active management if renewable energy targets are to be met within the current grid capability. Several specific recommendations are made in the paper that have relevance to power utilities, generators, plant manufacturers, network planners and monitoring and control equipment providers. These recommendations will facilitate concept validation and the implementation of future active management schemes.
Application of finite difference method in determination of static shear stress influence on soil liquefaction

The aim of this study is to investigate the effect of static shear stress on the liquefaction potential of soil, and to propose a closed-form solution that takes this effect into account. Two-dimensional finite-difference-based numerical analyses, involving the use of various generic soil and earthquake combinations, were performed. The analyses include slopes with nonzero static shear stresses. It is concluded that the effect of the initial static shear stress on liquefaction resistance is highly dependent on the soil stiffness and on the initial on-site shear stress level, whereas nearly no effect is exerted by earthquake magnitude.
Analysis of the external filtered modes of a semiconductor laser with filtered optical feedback

We present a detailed analysis of the external filter mode (EFM) structure of a semiconductor laser subject to filtered optical feedback (FOF). These EFMs form the 'backbone' of the dynamics of the system. Specifically, from the governing delay differential equations, we find analytic, transcendental expressions for both the solution curves, which define the frequency and amplitude of the EFMs, and their envelopes. We use numerical continuation to find and follow solutions of these equations. This approach allows us to show how the structure depends on the key parameters of filter width, filter detuning, and feedback phase. In other words, we identify the external influence of the filter on an otherwise fixed laser.
Comparison of Loudspeaker Equalization Methods Based on DSP Techniques

Methods of loudspeaker response equalization using digital filters are compared. In addition to generally known methods and techniques a recently introduced new principle, based on warped filters, is described. Different equalization methods are compared from the points of view of equalization error both objectively and subjectively, computational efficiency, as well as robustness and precision requirements of each method. The study is limited to the linear (magnitude and phase) equalization of loudspeaker free-field responses.
Model for Situation Awareness and Driving: Application to Analysis and Research for Intelligent Transportation Systems

The concept of situation awareness (SA)—applied broadly over the last decade to human factors issues in aviation, nuclear power generation, and military combat systems—has only recently been introduced to the analysis of driver behavior. In a driving context, SA involves spatial, temporal, goal, and system awareness. These aspects of SA have been integrated into a goal-oriented model of driver behavior that encompasses strategic, tactical, and operational goals of driving. Maintenance of appropriate SA for each type of goal is based on three underlying processes: perception, comprehension of disparate information, and projection and prediction. The model can be used as a basis for understanding the possible impact of new generations of intelligent transportation systems (ITSs) on driver performance. The model allows ITSs to be analyzed for how they are likely to enhance or impair a driver’s performance in pursuit of each type of driving goal. The model may provide a way to determine how an ITS supports or interferes with the required SA to meet a driving goal (e.g., an onboard navigation system that assists strategic decisions).
Public Transit Catchment Areas

The coordination of bicycle and transit modes has received close attention from public transit planners and researchers in recent years as transit agencies around the world have installed bicycle racks on transit vehicles, implemented bicycles-on-trains policies, and made other efforts to facilitate bicycle-transit integration. Many planners presume that the catchment area for transit is enlarged by these efforts, but geographic changes in the size of catchment areas have not been documented effectively. The research project reported in this paper assessed the distances traveled on bicycle by cycle-transit users (CTUs) and included (a) those who used bicycles as a means of access to transit stops and stations and (b) those who bicycled to and traveled on transit with their bicycles. A mixed-methods approach was employed, with a literature review; a survey of CTUs in Philadelphia, Pennsylvania, and San Francisco, California; and telephone interviews with a subset of survey respondents. Responses in the two cities made it possible to define CTU characteristics and behavior in detail. The responses highlighted two intriguing findings. First, transit catchment areas could be much larger for CTUs than for traditional transit users who accessed transit buses and rail on foot. Second, the concept of a cycle—transit catchment area was seen to be complex because of the variety of travel opportunities that cycle-transit coordination policies presented to transit riders. CTUs took advantage of larger catchment areas to reduce their travel costs, and they used those catchment areas in curious and less predictable ways.
An Extremely Wide Bandwidth, Low Noise SIS Heterodyne Receiver Design for Millimeter and Submillimeter Observations

Our group has designed a heterodyne submillimeter receiver that offers a very wide IF bandwidth of 12 GHz, while still maintaining a low noise temperature. The 180-300 GHz double-sideband design uses a single SI5 device excited by a full bandwidth, fixed-tuned waveguide probe on a silicon substrate. The IF output frequency (limited by the MMIC low noise IF preamplifier) is 6-18 GHz. providing an instantaneous RF bandwidth of 24 GHz (double-sideband). Intensive simulations predict that the junction will achieve a conversion loss better than 1-2 dB and a mixer noise temperature of less than 20 K across the band (twice the quantum limit). The single sideband receiver noise temperature goal is 70 K. The wide instantaneous bandwidth and low noise will result in an instrument capable of a variety of important astrophysical and environmental observations beyond the capabilities of current instruments. Lab testing of the receiver will begin this summer, and first light on the CSO should be in the Spring of 2003. At the CSO, we plan to use receiver with WASP2, a wideband spectrometer, to search for spectral lines from SCUBA sources. This approach should allow us to rapidly develop a catalog of redshifts for these objects.
The impact of technological change in a service organization

Any technological change has the potential to impact the job content of all organizational levels, from the shop floor to upper management echelons, but not necessarily in the same manner. This study evaluates the impact of a technological change in a service organization on actual and perceived job content across different organizational levels. The research investigated the reaction of bank employees and branch managers to the introduction of a significant technological change. The change was the introduction of a comprehensive software package that enabled a wider variety of services while reducing response time. One hundred and sixty participants from 23 branches of a single bank were involved in this study: 79 constituted the experimental group and 81 participants served as a control group. Results show that while tellers did not perceive any change in job content, branch staff experienced an increase in autonomy and an overall increase in motivating potential, but managers experienced a decrease in motivation and satisfaction with their growth and development. At the same time, after the change, employees job content, objectively measured, had expanded. A subsequent management survey suggested that a major reason for the difference in response was lack of information sharing and inadequate preparation for the change.