Miracle-dz/UniFAR-FTUs huggingface dataset:
Dynamic Characteristics Analysis of STATCOM for Reactive Compensation in Wind Farm

This paper establishes a dynamic model for wind turbine-generator unit,including the wind-turbine and asynchronous induction generator.Based on the proposed dynamic model,a model of wind farm connected with an infinite system is constructed.Based on the DC voltage control as well as the feedback control of reactive current,a new control algorithm is presented for STATCOM.Considering three cases,i.e.,the wind speed ramp,the wind gust and the wind disturbance,the numerical simulations on compensation characteristics of STATCOM are studied.The compensation effects between TCSC and STATCOM are compared.The simulation results illustrate that STATCOM can track the changing of reactive power quickly and stably in the procedure of reactive power compensation comparing to TCSC,and there are no serious inrush currents or over-voltages.
THE USE OF A NEURAL NETWORK TECHNIQUE FOR THE PREDICTION OF SLUDGE VOLUME INDEX IN MUNICIPAL WASTEWATER TREATMENT PLANT

Modeling Sludge volume index of activated sludge process in municipal WWTP is a difﬁcult task to accomplish due to the high nonlinearity of the plant and the non-uniformity and variability of influent quantity, quality parameters, and operation condition. ANNs were developed for the prediction of the Sludge Volume Index using influent quality parameters and operating parameters of Batna Wastewater Treatment Plant from 2011 to 2014. The best model given by the neural network for the SVI prediction composed of one input layer with fifteen input variables, one hidden layer with thirteen nodes and one output layer with one output variable with R = 0.8784 and RMSE = 0.443. The results demonstrate the ability of the appropriate Neural Network models for the prediction of SVI. This provides a very useful tool that can be used by WWTP operators in their daily management to increase treatment process performances and WWTP reliability
Influence of Ground-Granulated Blast-Furnace Slag on the Structural Performance of Self-Compacting Concrete

In the last decades, the utilization of industrial waste like ground granulated blast furnace slag (GGBFS) has proven itself a great asset in the modern construction industry. Aiming at promoting the green housing initiatives, the present study focuses on the study of the influence of GGBFS on the structural performance of Self Compacting Concrete (SCC). In the initial phase of the extensive experimental programme, concrete cubes were prepared with the partial replacements of GGBFS (10%, 15%, 20%, 25% and 30% with cement) and tested against the control mix in order to investigate the associated mechanical properties (compressive strength, tensile splitting strength and flexural strength). At crack width/depth/length as compared to the control mix. An empirical relationship was also proposed based on the experimental test results (in relation to the mechanical properties) in line with American and Indian standards code of practice.
A longitudinal examination of French and English reading comprehension in French immersion programs in Canada

Abstract Parental level of education, instruction time, and amount of language practice that children receive have enhanced our understanding of how bilingual and multilingual children learn to comprehend text. Guided by the simple view of reading and the interdependence hypothesis, this longitudinal study conducted in Canadian French immersion programs examined the (a) within- and cross-language association between oral language skills and reading comprehension of bilingual English–French and multilingual children and (b) patterns of growth, while controlling for possible influences of parental level of education and methods of instruction on reading achievement. The sample included 150 children tested once at the beginning of Grade 4 (T1) and again at the end of Grade 4 (T2) and in Grade 6 (T3). Individual growth modeling revealed that bilingual and multilingual children showed similar development in oral language and reading skills across the timeframe. Moreover, growth in English and French reading comprehension was associated with within-language variables. English reading comprehension in Grade 4 was also associated with cross-language variables, including French listening comprehension and vocabulary knowledge. Reading development in the second and third language is enhanced in contexts where classroom instruction, as well as social, economic, and educational opportunities to learn, is equivalent for all students.
A review of multi-component maintenance models

We review the literature on multi-component maintenance optimization. The focus is on work appearingsincethesurveybyChoandParlar(1991). ThispaperbuildsforthonthereviewarticlebyDekkeretal. (1996), which focusses on economic dependence, and the survey of maintenance policies by Wang (2002), in which some group maintenance and some opportunistic maintenance policies are considered. Our classification schemeisprimarilybasedonthedependencebetweencomponents(stochastic,structuraloreconomic). Next,we alsoclassifythepapersonthebasisoftheplanningaspect(short-termvslong-term),thegroupingofmaintenance activities (either grouping preventive or corrective maintenance, or opportunistic grouping) and the optimization approach used (heuristic, policy classes or exact algorithms).
A cross-correlation approach for improved timing estimation in OFDM broadcasting systems

A computationally simple cross-correlation based approach for improving timing estimation and frame detection performance in OFDM systems is proposed. The new technique requires only one pilot symbol and this can be used further for frequency-offset estimation, by employing standard available techniques. Simulation results show that the proposed approach performs more robustly relative to state-of-the-art autocorrelation based approaches. Copyright © 2006 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Switched Beam Antenna System for V2V Communication in 5G Applications

In this paper, a switched beam antenna system consists of four Vivaldi antennas for vehicle-to-vehicle communication is presented. The proposed design is realized on a substrate material of “Rogers 5880” with εr=2.2,tanδ=0.002,andεr=2.2,tan⁢δ=0.002,and0.508-mm substrate thickness. The antenna is designed to operate at a center frequency of 28 GHz with operating bandwidth of 1.463 GHz. An overall realized gain of 9.78 dBi is achieved at the intended center frequency. The proposed antenna is designed and simulated using CSTMWS. It is also fabricated using photolithography techniques and measured using R&S vector network analyzer. Good agreement is obtained between both CSTMWS and measured results.
Doença hemolítica do recém-nascido (eritroblastose fetal): do diagnóstico ao tratamento

O objetivo principal de estudo é revisar a literatura em relação à etiologia da eritroblastose fetal dando ênfase a fisiologia da mesma. Citando as formas de diagnóstico da doença, variações nas práticas terapêuticas ao longo dos anos e seu impacto no prognóstico. Trata-se de uma revisão integrativa da literatura. foram consultadas as seguintes bases de dados: Medical Publications (PubMed), Scopus (Elsevier), Google acadêmico e Scientific Electronic Library Online (SciELO). Foram utilizados os seguintes termos nas bases de dados: Eritroblastose fetal, Sistema ABO, Sistema Rh, Diagnóstico e Tratamento. Dentro do recorte temporal de 2017 a 2022. Os 19 estudos selecionados abordados são amplamente discutidos, em vários aspectos, tais como a importância do diagnóstico da DHPN, como a sua prevenção. Além do mais, dentre os artigos selecionados, nota-se que a busca por uma terapêutica eficaz é constante em pacientes acometidos pelo DHPN, exibindo novas descobertas e ampliando cada vez mais as possibilidades disponíveis. A partir disso, é importante ressaltar que novas políticas de saúde devem ser implantadas visando minimizar os casos da patologia, como por exemplo, cursos de atualização e capacitação para todos profissionais que estejam diretamente ligados à obstetrícia, bem como palestras acessíveis para a população em idade fértil em geral, priorizando casais que estejam esperando seu segundo filho.
Analysis of the possibility of switching to agroforestry in Zselic

Agroforestry solutions offer better use of disadvantaged agricultural land. Steep slopes and the constant risk of game damage are not conducive to agriculture. On slopes, the cost of machine operating hours is higher than on plane areas, and machines also wear out faster due to higher loads. Varied topography, steep slopes and deep valleys characterize the examined Zselic hills. There is typical forest management on the steep slopes that results in higher opportunity for game damage in the agricultural areas surrounded by forests. There are steep slopes under agriculture cultivation too that involve high operating costs. In our article, we examined whether the actual steep areas under current agricultural cultivation (slope> 12%) are large enough to consider switching to agroforestry. We have found that a quarter of all agricultural areas included in the examination is located on steep slopes, where it is worth considering switching to game damage-resistant agroforestry.
Teleoperation from movable bases : modeling, analysis, design and experiments with a hydraulic motion platform

There are manual control and teleoperation systems in which the operator is subject to base motion. Examples are aircraft piloting and joystick control of heavy hydraulic machines such as excavators. This thesis presents a new framework for the modeling, analysis, design and evaluation of controllers for teleoperation/manual control from movable bases. First, a general model for teleoperation/manual control from movable bases is presented. Second, models for the operator dynamics are introduced and identified experimentally. Third, a novel robust ^-synthesis based control system design approach is proposed that addresses robust stability and performance issues. The approach is illustrated by a prototype single-degree-offreedom manual control task in which the operator positions his/her base, a hydraulic motion simulator, using a force-feedback joystick. The designed controllers are robustly stable with respect to parametric uncertainties in the arm/joystick as well as the feedthrough dynamics, and achieve a desired level of performance based on relevant measures. The proposed methods are compared with controllers that ignore the base motion through analysis and a set of experiments. The robust controllers suppress the operator-induced oscillations and produce well-damped responses, whereas the fixed base controllers become unstable. Motivated by the need for high performance motion simulation in the evaluation of controllers for feedthrough cancellation, the position control of mechanical systems driven by hydraulic actuators is studied. This includes single-cylinder hydraulic servo-systems and multipledegree-of-freedom hydraulic robots. Nonlinear dynamics of the actuators and nonlinear rigid body dynamics are considered in the model of hydraulic robots. For single-degree-of-freedom systems, valve dynamics are also included. Parametric uncertainties are allowed in these models. Using the backstepping technique, novel nonlinear and adaptive/nonlinear control laws are proposed that incorporate the system dynamics into their design. It is proven via Lyapunov i i
Cardiovascular and locomotory parameters during training in Thoroughbred racehorses: a multi-national study

Studies assessing concurrent speed, cardiovascular physiology and biomechanical parameters in racehorses during training have been rarely reported, mostly due to a lack of available comprehensive technology. Here, using a validated device (the ‘Equimetre’™) that records all parameters simultaneously, we report the effect of increased training speed and thus intensity, from slow canter to hard gallop, on racehorse heart rate, heart rate recovery and on biomechanical parameters, such as stride length and frequency. We also demonstrate the effects of varying track surface, horse age and sex. Cohorts comprised a total of 509 Thoroughbred racehorses in-training in either Australia or France, completing a total of 1,124 and 6,016 training sessions, respectively. Horses varied by age (2-9 years old) and sex (including geldings) and were trained by either a single trainer (Australia) or two trainers (France); both using multiple training centres that varied by track surface (sand, turf or fibre). Data were analysed using Analysis of Variation (ANOVA) or linear mixed-effect models as appropriate. Racehorses increased speed predominantly by an increment in stride length, then frequency, both of which varied according to track surface (shorter stride on sand; P<0.001). Cardiovascular parameters (peak, and recovery of, heart rate) increased with training intensity, but not linearly (Ptrend<0.001). Older horses recorded lower heart rate at 15 mins after training (P=0.002), often due to lower achieved peak heart rate at most training intensities (P<0.001 for the cohort in Australia). In conclusion, this immersive field study demonstrates the value of technology for recording physiological and biomechanical parameters of racehorses-in-training. The data could inform trainers, jockeys and owners on aspects of individual racehorse health, welfare and suitability for certain races.
Estimating the Risk of Maternal Death at Admission: A Predictive Model from a 5-Year Case Reference Study in Northern Uganda

Background Uganda is one of the countries in the Sub-Saharan Africa with a very high maternal mortality ratio estimated at 336 deaths per 100,000 live births. We aimed at exploring the main factors affecting maternal death and designing a predictive model for estimation of the risk of dying at admission at a major referral hospital in northern Uganda. Methods This was a retrospective matched case-control study, carried out at Lacor Hospital in northern Uganda, including 130 cases and 336 controls, from January 2015 to December 2019. Multivariate logistic regression was used to estimate the net effect of the associated factors. A cumulative risk score for each woman based on the unstandardised canonical coefficients was obtained by the discriminant equation. Results The average maternal mortality ratio was 328 per 100,000 live births. Direct obstetric causes contributed to 73.8% of maternal deaths; the most common were haemorrhage (42.7%), sepsis (24.0%), hypertensive disorders (18.7%) and complications of abortion (2.1%), whereas malaria (23.5%) and HIV/AIDS (20.6%) were the leading indirect causes. The odds of dying were higher among women who were aged 30 years or more (OR 1.12; 95% CI, 1.04–1.19), did not attend antenatal care (OR 3.11; 95% CI, 1.36–7.09), were HIV positive (OR 3.13; 95% CI, 1.41–6.95), had a caesarean delivery (OR 2.22; 95% CI 1.13–4.37), and were referred from other facilities (OR 5.57; 95% CI 2.83–10.99). Conclusion Mortality is high among mothers referred late from other facilities who are HIV positive, aged more than 30 years, lack antenatal care attendance, and are delivered by caesarean section. This calls for prompt and better assessment of referred mothers and specific attention to antibiotic therapy before and after caesarean section, especially among HIV-positive women.
Application of moving average as technical indicator to predict stock market direction

The shares and securities price movements as analyzed broadly by two key approaches, namely fundamental approach and technical approach. The fundamental approach emphasis much on the growth prospects of economy, stability of government, the prospects of the specific industry and the specific company whereas the technical approach emphasis much on the price and volume movement of the stock. Based on the price and volume movements of stock the buying and selling decisions are taken.
Durability of Second-Line Anti-Retroviral Therapy in a Resource-Limited Setting: An 11-Year Analytical Cohort

Background : It is projected that up to 19 · 6% of patients on ART in Sub-Saharan Africa will need second-line treatment by 2030, but the durability of such therapy remains unclear. This study investigated the durability of second-line ART and the factors associated with the viral rebound among patients on second-line ART in Uganda. Methods : A retrospective dynamic cohort of adults initiated on second-line ART after confirmed virological failure to first-line ART. Patients that had taken second-line for ≥ 6 months between 2007 and 2017 were included. Patients were followed until they experienced a viral rebound (Viral load ≥ 200copies/ml). Cumulative probability of viral rebounds and factors associated with viral rebound were determined using Kaplan-Meier methods and Cox proportional hazard models, respectively. 5 age, sex, viral load, CD4 count, duration on first-line, Hepatitis B co-infection, TB co-infection, Nucleoside Reverse Transcriptase Inhibitor(NRTI) back backbone, None-Nucleoside Reverse Transcriptase Inhibitor(NNRTI), and anchor Protease Inhibitor (PI). The continuous variables were categorised into groups to reflect clinical or public health approaches to managing HIV/ AIDS. In the adjusted model, variables with p-value<0 · 2 at unadjusted analysis were selected into the adjusted model. Proportional hazard assumption for Cox-PH was checked using Schoenfeld residuals. The final model was checked for collinearity and effect modification between covariates. Statistical significance was set at 5% level. Sensitivity analysis using death and loss to follow-up as competing risks with viral rebound, was performed using Cumulative Incidence Function.
Pixel neurochip characterization

In this work a probe built for in-vivo neuronal recording is presented and analysed. Advantages that this design provide for extracellular potential measurements are discussed along with standard electro-physiological methods. Starting from simulations and physical characterizations the conditions necessary to properly operate the sensor are deduced. Issues and limitations will be discussed and addressed together with possible investigation methods. The final part consist in a discussion on high-k dielectric materials that can be included in the fabrication process of the chip. Impedance properties and parameters of interest from a biological standpoint are also extracted.
Dynamic land use implications of rapidly expanding and evolving wind power deployment

The expansion of wind power poses distinct and varied geographic challenges to a sustainable energy transition. However, current knowledge of its land use impacts and synergies is limited by reliance on static characterizations that overlook the role of turbine technology and plant design in mediating interactions with the environment. Here, we investigate how wind technology development and innovation have shaped landscape interactions with social and ecological systems within the United States and contribute to evolving land area requirements. This work assesses trends in key land use facets of wind power using a holistic set of metrics to establish an evidence base that researchers, technology designers, land use managers, and policymakers can use in envisioning how future wind-intensive energy systems may be jointly optimized for clean energy, social, and environmental objectives. Since 2000, we find dynamic land occupancy patterns and regional trends that are driven by advancing technology and geographic factors. Though most historical U.S. wind deployment has been confined to the temperate grassland biome in the nation’s interior, regional expansion has implicated diverse land use and cover types. A large percentage of the typical wind plant footprint (∼96% to \,$? > > 99%) is not directly impacted by permanent physical infrastructure, allowing for multiple uses in the spaces between turbines. Surprisingly, turbines are commonly close to built structures. Moreover, rangeland and cropland have supported 93.4% of deployment, highlighting potential synergies with agricultural lands. Despite broadly decreasing capacity densities, offsetting technology improvements have stabilized power densities. Land use intensity, defined as the ratio of direct land usage to lifetime power generation of wind facilities, has also trended downwards. Although continued deployment on disturbed lands, and in close proximity to existing wind facilities and other infrastructure, could minimize the extent of impacts, ambitious decarbonization trajectories may predispose particular biomes to cumulative effects and risks from regional wind power saturation. Increased land-use and sustainability feedback in technology and plant design will be critical to sustainable management of wind power.
Independent variation of avian sensitivity to climate change and trait‐based adaptive capacity along a tropical elevational gradient

How species respond to climate change is influenced by their sensitivity to climatic conditions (i.e. their climatic niche) and aspects of their adaptive capacity (e.g. their dispersal ability and ecological niche). To date, it is largely unknown whether and how species’ sensitivity to climate change and their adaptive capacity covary. However, understanding this relationship is important to predict the potential consequences of a changing climate for species assemblages. Here, we test how species’ sensitivity to climate change and trait‐based measures of their ecological adaptive capacity (i) vary along a broad elevational gradient and (ii) covary across a large number of bird species.
Temperature decrement rate of bath tub water for ice bath therapy

The objectives of this study are to evaluate the decrement rate in the ice bath water temperature in different environment conditions and study the decrement rate in the ice bath water temperature using a different pump capability. First, in the study of different environment conditions, the decrement rates of water temperature were tested with and without top cover. In addition, both conditions were tested with their environments i-exposed directly to sunlight, ii-exposed indirectly to sunlight and iii-tested in the air-conditioned rooms. The study was done experimentally using a chiller provided by Institut Jantung Negara (ISN). Second, in the study of the decrement rate in the ice bath water temperature, two pumps with Hilea chiller are considered. Two pumps with different flow rate were used using Hailea chiller model HS-90A where 1400 litre per hour and 4000 litre per hour of pump were tested. All temperature data for each experiment were taken and plotted in the graph using linear equation y = mx + c for each experiment. Using the equation, the duration of time required for the ice bath water temperature reaches 12degC can be evaluated. Therefore, the best experimental conditions can be determined through the shortest period of time. Where the test done in air-conditioned rooms and bath tub with top cover were the best conditions for ice bath cooling process. Whereas, for the test with different pump flow rate, pump A with 1400 litre per hour has a better rate of temperature decrease compared to pumps B with 4000 litres per hour.
E-Learning in Life Long Education

E-Learning is the use of telecommunication technology to deliver information for education and training and it is emerging as the new paradigm of modern education. Because of the increasing amount of technology integration in the learning environment, more and more studies focus on examining ‘‘how people learn with technology’’ This study developed an integrated model with six dimensions: learners, instructors, courses, technology, design, and environment. The results revealed that learner computer anxiety, instructor attitude toward e-Learning, e-Learning course flexibility, e-Learning course quality, perceived usefulness, perceived ease of use, and diversity in assessments are the critical factors affecting learners’ perceived satisfaction. Discussion is given related to these findings and the implications to e-learning in life long learning and also future research.