Miracle-dz/UniFAR-FTUs huggingface dataset:
STRATEGY TO REDUCE EFFECTIVE CURRENT OF BLDC MOTORS UNDER OPEN-PHASE FAULT IN ORDER TO DECREASE MOTOR DAMAGE

This paper presents a strategy to reduce the current of the healthy phases for brushless DC motors (BLDC) in open-phase fault, avoiding the degradation of the motor and allowing the safe shutdown. After an openphase fault diagnosis, through an algorithm capable of detecting and identifying faults and phase returns of the BLDC motor in real time, a corrective action divided in three-steps is proposed. First, the traditional 120◦ Six-Step operating method is changed for a switching Artigo submetido em 17/05/2018. Primeira revisão em 18/07/2018. Aceito para publicação em 23/10/2018 por recomendação do Editor Marcello Mezaroba. http://dx.doi. org/10.18618/REP.2018. 4.0008 strategy using the two healthy phases in 180◦ driving to reduc the loss of torque at failure. Second, a trapezoidal shape is imposed for the current reference in synchronism with the induced voltages between the healthy phases in order to reduce motor current level and hence improve the motor efficiency. And third, the bandwidth of the speed control loop is reduced to mitigate the influence of speed oscillations due to the failure on the controller. The experimental results show that the operation method with the proposed strategy to reduce current motor allows a reduction of approximately 25% in the effective (RMS) current and of 40% in the motor temperature variation compared to the usual operating method under phase failure without the proposed strategy.
Future Transistor For Hand-Held Devices

This paper highlights the challenges for Semiconductors Professionals and consequently gives the solutions. In this, different technologies have been compared and come up with some solutions. Main responsible parameters for a device performance i.e. drain-induced barrier lowering (DIBL) and short channel effect (SCE) has also been discussed analytically . After focusing on handheld devices it ends up with an answer that UTBB FDSOI technology has become mainstream within industries, with the purpose to serve a wide spectrum of mobile multimedia product.Ultralow-power electronics will expand the technological capability of handheld and wireless devices by dramatically improving battery life and portability
The science of negative index materials

Metamaterials are designed to have structures that make available properties not found in Nature. Their unique properties (such as negative index of refraction, n) can be extended from GHz all the way to optical frequencies. We review the scaling properties of metamaterials that have been fabricated and give negative n and negative permeability, μ. It is found that most of the experimentally realized metamaterials have λ/a between 2 (THz and optical region) and 12 (GHz region), where λ is the operation wavelength and a is the size of the unit cell. The transmission losses for the experimental structures and the ratio λ/a for the simulated structures are presented. Finally, a comparison of the different metamaterial designs (fishnet, cut and/or continuous wires, and split-ring resonators and wires) is given.
Vision-Based Bicycle Detection Using Multiscale Block Local Binary Pattern

Bicycle traffic has heavy proportion among all travel modes in some developing countries, which is crucial for urban traffic control and management as well as facility design. This paper proposes a real-time multiple bicycle detection algorithm based on video. At first, an effective feature called multiscale block local binary pattern (MBLBP) is extracted for representing the moving object, which is a well-classified feature to distinguish between bicycles and nonbicycles; then, a cascaded bicycle classifier trained by AdaBoost algorithm is proposed, which has a good computation efficiency. Finally, the method is tested with video sequence captured from the real-world traffic scenario. The bicycles in the test scenario are successfully detected.
Strengthening Short Concrete Columns Using Longitudinally Bonded CFRP Laminates

Synopsis: This paper investigates the behavior of short concrete columns strengthened with externally bonded longitudinal carbon fiber-reinforced polymer (CFRP) laminates combined with transverse basalt fiber-reinforced polymer (BFRP) wraps. A total of eighteen 500 mm-long [19.69 in-long] concrete column specimens with a square cross section (150 mm [5.91 in] width) were tested with different longitudinal and transverse reinforcement combinations under concentric and eccentric axial loadings. For eccentric loading, three end eccentricity to width ratios of 0.1, 0.2, and 0.3 were applied symmetrically at both ends of each simply supported column specimen to provide single curvature condition. The compressive longitudinal CFRP strips, in average, experienced 38% of their tensile rupture strain. The experimental results showed debonding of longitudinal CFRP laminates from concrete surface and buckling of bonded specimens as the dominant mode of failure, and revealed that transverse wrapping system is efficient in postponing the buckling/debonding failure.
Influence of Feeding Management and Seasons on Yield and Composition of Milk Produced from Friesian Crossbred Cows Raised Under Hot and Humid Environment in Central Thailand

A twelve-month on-farm experiment was carried out to investigate the effects of feeding management and seasons on yield and composition of milk from a total of 825 dairy cows with different Friesian crossbred levels raised under the hot and humid environment in central Thailand. Forty pre-selected farms were classified into two groups of twenty farms each (standard and substandard) according to feed and feeding management practices. The cows in first group received feeds that met the NRC’s energy and protein daily requirments, whereas those in the second group were provided with substandard feeding practices. The % Friesian crossbred cows were classified into 87.5 %. All cows were raised indoors throughout the three seasons (summer, rainy, and winter). It was observed that milk yield from cows fed the standard diet, averaging 15.90 kg/day, was 2.02 kg/day higher (P<.01) than those in the substandard group. The standard fed cows produced 0.25 % more (P<.01) milk fat (4.37 versus 4.12%), 0.16% milk protein (3.43 versus 3.27%), and 0.23 % SNF (8.81 versus 8.58 %) than the substandard ones respectively. Milk yield increased proportionally with increasing % Friesian crossbred levels, whereas milk components gradually decreased. The decline in milk composition was higher in the substandard fed group when compared to the group receiving the standard feed. In addition, the cows during the hot season produced milk with lower (P<0.01) milk protein and SNF than those in the remaining rainy and winter seasons.
Integration of United States, Thailand and Philippine Canned Tuna Markets

In this study we investigate price integration in the United States, Thailand and Philippine canned tuna markets by employing a dynamic model of spatial price differentials to determine how rapidly and completely price information is transmitted from one market to another over time. When the United States is assumed to be the central canned tuna market, we find that the Thai canned tuna market operates independently of price conditions in the United States. On the other hand, the Philippine market is well integrated with the United States market in the sense that a change in the United States price is quickly and effectively communicated to the Philippine market. These results are shown to have significant implications with regard to measures the United States might take to control the flow of canned tuna imports from Southeast Asia.
Case study of the usage of Kralicek Quick Test for assessing insolvency : Latvian experience

This article presents a review of existing tests of the assessment of enterprises insolvency. As for the users of non-financial market models, the authors apply the KISS principle (keep it simple, stupid) to research the development of risk index model, focussing on Kralicek Quick Test involved in this group. The authors study the assessment of Latvian enterprises insolvency based on historical data for 48 enterprises using Kralicek Quick Test.
Statistical Study of Chromospheric Evaporation in Impulsive Phase of Solar Flares

We present a statistical study of chromospheric evaporation in solar flares using simultaneous observations by the RHESSI X-ray telescope and the Interface Region Imaging Spectrograph UV spectrograph. The results are compared with radiation hydrodynamic flare models from the F-CHROMA RADYN database. For each event, we study spatially resolved Doppler shifts of spectral lines formed in the transition region (C ii 1334.5 Å) and hot coronal plasma (Fe xxi 1354.1 Å) to investigate the dynamics of the solar atmosphere during the flare impulsive phase. We estimate the energy fluxes deposited by high-energy electrons using X-ray imaging spectroscopy and assuming the standard thick-target model. Using the RADYN flare models, the RH 1.5D radiative transfer code, and the Chianti atomic line database, we calculate C ii and Fe xxi line profiles and compare with the observations. While the RADYN models predict a correlation between the Doppler shifts and deposited energy flux for both lines, this was only observed in the C ii data. Several quantitative discrepancies are found between the observations and models: the Fe xxi Doppler shifts are substantially stronger in the models than in the data, and the C ii mean blueshifts are absent in the observations but predicted by the models. The transition energies between “gentle” and “explosive” evaporation regimes estimated from the observations ( erg cm−2 s−1) and derived from the models ( erg cm−2 s−1) are comparable with each other. The results illustrate relationships among the processes of chromospheric evaporation, the response of the colder layers, and the flare energy flux deposited by high-energy electrons, although demonstrating discrepancy between analyzed observations and RADYN models.
The struggle for legitimacy: language provision in two ‘residual’ comprehensive high schools in Australia

ABSTRACT Despite the contemporary policy rhetoric of global citizenry and the importance of languages and intercultural capabilities, language learning in Australian schools struggles for recognition and support. The curriculum marginalisation of languages, however, is uneven, affecting some school sectors more than others. In this article, we examine the provision of languages in two government comprehensive high schools, both low socio-economic status, located in urban areas in New South Wales, Australia’s largest state. They are termed ‘residual’ high schools because they cater for the students remaining in the local schools while others attend either private or selective government high schools. We provide a qualitative picture of language provision in these two schools from the perspectives of key stakeholders – school principals, teachers, students and parents. We also draw on observational data of language classes. The aim is to provide, within a largely social class framework, an understanding of the state of language provision in these schools. We argue that currently students in these schools are experiencing unequal access to the linguistic and cultural capital associated with language learning relative to students in more privileged communities and schools.
Factors Influencing Illinois Farmland Values

A hedonic model of Illinois farmland values is estimated using county-level cross-section time-series data. Explanatory variables include land productivity, parcel size, improvements, distances to Chicago and other large cities, an urban-rural index, livestock production through swine operation scale and farm density measures, population density, income, and inflation. The inclusion of spatial and serial correlation components substantially improves the model fit. Farmland values decline with parcel size, ruralness, distance to Chicago and large cities, and swine farm density, and increase with soil productivity, population density, and personal income.
Proliferation of preferential trade agreements: an empirical analysis

The creation of a preferential trade area (PTA) or the deepening of an existing one can affect adversely excluded countries and induce them to join or create a new PTA (Baldwin, 1993). One such adverse effect is trade diversion, the shift of imports from countries outside the preferential trade area toward member countries. This paper investigates empirically whether countries whose exports are more likely to suffer from trade diversion exhibit a higher likelihood of forming a PTA. I derive a measure of the potential of trade diversion from the trade complementarity index (Michaely (1962)) and estimate a dynamic Probit model of new PTAs formed between 1961 and 2005. The results show that countries facing a larger potential of trade diversion are more likely to form a PTA in the future. The results also support the natural trading partner hypothesis according to which preferential trade agreements are more likely to be formed among countries that are predisposed to trade a lot.
Assessment of the atmospheric channel for short (Ka-band and optical) wavelengths

Atmospheric turbulence under clear sky conditions is an impairment of the atmospheric channel that greatly affects propagation of optical signal in the troposphere. The turbulence manifests itself in a number of forms within the optical domain, from the twinkling of a star in a clear night, to resolution degradation in a large aperture telescope. Therefore, a body of analytical, numerical, and experimental tools has been developed in optics to study, simulate, and control effects of atmospheric turbulence on an optical signal. Incidentally, there has been an increasing demand for high data rate returns from NASA missions which has led to envision utilizing a carrier signal in the Ka-Band range. The impact of atmospheric turbulence effects must be evaluated and considered for this frequency domain. The purpose of this work is to show that when the turbulence strength from the optical case to the KaBand ease is properly scaled, one can apply the same mathematical simulation developed for optical to predict turbulence effects within the Ka-Band domain. As a demonstration of this principle, we present how the scintillations of a Ka-Band downlink return of a deep space signal was successfully reproduced through wave-optics simulation.
ADDRESS - Active Demand for the smart grids of the future

The ADDRESS European project aims to deliver a comprehensive commercial and technical framework for the development of "active demand" in the smart grids of the future. Specifically, ADDRESS will investigate how to effectively activate participation of domestic and small commercial customers in the power system markets and in the provision of services to the different power system participants. This paper gives an overview of the project: its objectives, scope and first draft architecture, the concepts that will be specifically developed to meet the objectives, the methodology adopted for development and validation, the main expected results and the project consortium. (4 pages)
Miniaturized Wearable Fractal Antenna for Military Applications at VHF Band

This paper presents the design and development of Koch fractal dipole antenna for wearable applications at 450 MHz. Common jeans cotton is used as a flexible substrate material having a dielectric constant of 1.6 for the design and fabrication of the proposed antenna. Increasing the number of iterations increases the number of sections, which eventually results in 32% reduction in size. Size miniaturization is obtained using second iteration Koch geometry with the antenna bandwidth of 10%, and the return loss of �25 dB is achieved under the flat condition. The investigations are to characterize the antenna not only in flat condition, but also under different bendings and crumpling conditions. The proposed Koch fractal antenna is close to the proximity of the body, and the absorption of electromagnetic power on human body is also examined. It is found that the Specific Absorption rate (SAR) is much below a safety level of 0.119 W/kg and hence suitable for wearable applications.
Pixel super-resolution of time-stretch imaging by an equivalent-time sampling concept

Optical time-stretch imaging entails a stringent requirement of state-of-the-art high-speed data acquisition unit in order to preserve high image resolution at an ultrahigh frame rate — hampering the widespread application of such technology. We here propose a pixel super-resolution (pixel SR) technique tailored for time-stretch imaging that can relax the sampling rate requirement. It harnesses a concept of equivalent-time sampling, which effectively introduces sub-pixel shifts between frames. It involves no active opto-mechanical subpixel-shift control and any additional hardware. We present the system design rules and a proof-of-principle experiment which restores high-resolution images at a relaxed sampling rate of 5 GSa=s.
Models for evolving networks: with applications in telecommunication and online activities

Driven by a range of modern applications that includes telecommunications, e-business and online social interaction, recent ideas in complex networks can be extended to the case of time-varying connectivity. Here, we propose a general framework for modelling and simulating such dynamic networks, and we explain how the long-time behaviour may reveal important information about the mechanisms underlying the evolution.
Visualization in 4D Construction Management Software: A Review of Standards and Guidelines

Visualization of construction schedules has much improved through the development of 4D modeling tools that offer an effective method for schedule planning and management. While increasingly used by the construction industry, existing 4D tools are being continually improved, and many new tools are being developed, especially with the increased adoption of building information modeling (BIM). The ability to observe the animated sequence of the construction process and track the construction status of each building component is just one of many possibilities offered by 4D modeling applications. However, as with the proliferation of any new technology, one of the inherent challenges with 4D modeling tools is a lack of agreed upon visualization standards for representing building elements and tasks. Specifically, each tool typically has its own standards for viewing and navigating the model and schedule. Interviews with AEC professionals and experts provide insights from the end-user perspective of the current visualization methods along with their recommendations. To start addressing some of these challenges, our team reviewed the current status and methods for visualizing construction schedules, building on the research efforts in the domains of information visualization and human-computer interaction. Based on the current experiences and feedback from AEC industry practitioners, a set of visualization guidelines for representing the construction process was developed, which supports future efforts in 4D model use and development.
On the Instability of Decelerating Shock Waves

We examine the decelerating shock instability (DSI) with a linear perturbation theory. We also investigate the effect of the self-gravity on the instability of a decelerating shoked layer. We find that the characteristics of the DSI can be obtained with a thin layer approximation and that the DSI is caused by the combination of the fluctuation of column density induced by the rippling of the shocked layer and the deceleration of the layer as a whole. There is a typical wavenumber k s (≡2β 1/2 ×(1-β) −1/2 |V s0 |/c s 2 ) in the dispersion relation of the DSI, where β is the pressure ratio of the trailing side to the deceleration of the layer as a whole
Integrable systems on S

We classify the links of basic periodic orbits of integrable vector field on S generalizing results on two degree of freedom hamiltonian systems. We also study the case of completely integrable systems and define invariants for the two classes of vector fields. 2010 AMS classification numbers: Primary 37J35 Secondary: 37D15, 34C25, 57R30.
Achievement Inequality and the Institutional Structure of Educational Systems: A Comparative Perspective

We review the comparative literature on the impact of national-level educational institutions on inequality in student achievement. We focus on two types of institutions that characterize the educational system of a country: the system of school-type differentiation (between-school tracking) and the level of standardization (e.g., with regard to central examinations and school autonomy). Two types of inequality are examined: inequality in terms of dispersion of student test scores and inequality of opportunity by social background and race/ethnicity. We conclude from this literature, which mostly uses PISA, TIMSS, and/or PIRLS data, that inequalities are magnified by national-level tracking institutions and that standardization decreases inequality. Methodological issues are discussed, and possible avenues for further research are suggested.
Application of pure aspect-oriented design patterns in the development of AO frameworks: A case study

The paper discusses results of a case study on the advantages applying pure aspect design patterns in the development of aspect-oriented (AO) application frameworks. By an AO application framework we mean a framework which, alongside with traditional object-oriented (OO) framework customization mechanisms, provides also abstract aspects as hot spots. We have tested the hypothesis that pure AO design patterns should promote the ease of designing collaborating abstract aspects representing hot spots. To this end, we studied the process of reworking of the OO simulation application framework into the AO framework. During this study, appropriate qualitative and quantitative data have been collected. The paper presents the generalization of the collected data and concludes that the above hypothesis has been proven. Objektinio karkaso pertvarkymas naudojant aspektinius projektavimo sablonus Žilvinas Vaira, Albertas Caplinskas Summary Straipsnyje pateikiami aspektinių projektavimo sablonų naudojimo aspektiniams dalykiniams karkasams projektuoti eksperimentinio tyrimo rezultatai. Aspektinis dalykinis karkasas – tai toks karkasas, kuriame greta tradicinių objektinio karkaso riemonių naudojami ir abstraktūs aspektai. Atliekant tyrimą siekta issiaiskinti, kokiu mastu aspektiniai projektavimo sablonai palengvina abstrakciųjų aspektų ansamblių projektavimą tokiuose karkasuose. Eksperimentas atliktas kaip atvejo analizė. Analizuotas imitacinio modeliavimo uždavinių sprendimo karkaso pertvarkymas is objektinio į aspektinį. Straipsnyje iskeltos kelios hipotezės apie aspektinių projektavimo sablonų naudojimo rezultatus ir pateikti tas hipotezes patvirtinantys siame eksperimentiniame tyrime surinkti kokybiniai ir kiekybiniai duomenys. : 18px;">