Miracle-dz/UniFAR-FTUs huggingface dataset:
Student Performance Prediction Using Machine Learning

Performance analysis of learning outcomes is a system that will aim for excellence at all levels and dimensions of the student’s field of interest. This paper suggests a comprehensive EDM framework in the form of a rule-based recommender system that not only analyses and predicts student achievement, but also demonstrates the reasons for it. The suggested framework examines students’ demographic information, study-related characteristics, and psychological factors to gather as much information as possible from classmates, teachers, and parents. School reports and queries used to collect the world’s latest data (e.g., student marks, population, social and school-related factors. Using a set of potent data mining methods, aiming for the greatest possible precision in academic performance prediction. The framework is effective in identifying the student’s weaknesses and making relevant recommendations. In contrast to current frameworks, the proposed framework outperforms them in a practical case study involving 200 individuals.
Study on Environment Characteristics for Mining Management at East Pit 3 West Banko Coal Mine

The management on mining environment is closely related to the environmental characteristics and the condition of mining itself. In East PIT 3 West Banko Coal Mine Tanjung Enim mine drainage system has been developed which refers to the open pit method employed by the company. The observation and analysis showed that the sludge settling ponds have been constructed as well as adequate catchment area. To discharge water into the channel at 0.3016 m 3 / sec can still be accommodated due to the dimensions of the channel that can accommodate an intake capacity of 1,639 m 3 / sec. While the use of lime made in the settling ponds with the ratio of 0.7 g: 1 liter of water indicates the water quality test results that meet the environmental quality standards that the pH is 6.7 with a TSS of 12mg / l Fe content was 2.1580 mg / l and Mn content of 1.3 mg / l.
Effects of HPA-Nonlinearity on a 4-DPSK/OFDM-Signal for a Digital Sound Broadcasting System.

Orthogonal Frequency Division Multiplexing (OFDM) in conjunction with a 4-DPSK modulation format has been proposed for the future digital audio broadcasting system (DAB), that should provide compact disk sound quality in portable, vehicular and fixed receivers. With properly chosen parameters, this system should be appropriate for both terrestrial and satellite transmission. In this paper the influence of the nonlinear distortions introduced by the high power amplifier (HPA) of the transmitter is examined. In particular, the degradation in power efficiency due to intermodulation effects and backoff operating, as well as spectral degradations are investigated.It is shown for three different kinds of limiting amplifier models, that even with an output backoff (OBO) in the region of 5-6 dB, the degradation of, e.g., a 512-carrier 4-DPSK/OFDM system relative to the linear case is below 1.7 dB, while the regenerated sidelobes of the transmitted spectrum are kept below -20 dB.
Multisite non-invasive brain stimulation in Parkinson’s disease: A scoping review

BACKGROUND: Parkinson’s disease (PD) is a progressive neurodegenerative disorder, characterized by cardinal motor symptoms in addition to cognitive impairment. New insights concerning multisite non-invasive brain stimulation effects have been gained, which can now be used to develop innovative treatment approaches. OBJECTIVE: Map the researchs involving multisite non-invasive brain stimulation in PD, synthesize the available evidence and discuss future directions. METHODS: The databases PubMed, PsycINFO, CINAHL, LILACS and The Cochrane Library were searched from inception until April 2020, without restrictions on the date of publication or the language in which it was published. The reviewers worked in pairs and sequentially evaluated the titles, abstracts and then the full text of all publications identified as potentially relevant. RESULTS: Twelve articles met the inclusion criteria. The target brain regions included mainly the combination of a motor and a frontal area, such as stimulation of the primary motor córtex associated with the dorsolateral prefrontal cortex. Most of the trials showed that this modality was only more effective for the motor component, or for the cognitive and/or non-motor, separately. CONCLUSIONS: Despite the results being encouraging for the use of the multisite aproach, the indication for PD management should be carried out with caution and deserves scientific deepening.
Automatic Recognition of Aircraft Noise with PLP Method

This paper proposes a modified auditory feature extraction algorithm based on perceptual linear predictive analysis which is more suitable for automatic recognition of aircraft noise. In this algorithm, a different distribution of filter-bank is introduced in order to fit the physical characteristic of aircraft noise and the result shows that the modified method indeed performs better. The effect of Gammatone filter in improving the robustness of recognition algorithm is also demonstrated in the experiment.
Logic circuits with carbon nanotubes

A new technique is used for achieving field‐effect transistors based on a single semiconducting nanotube and with a gate that is local and that provides an excellent capacitive coupling with the nanotube. Transconductance measurements are reported that show the possible injection of either p‐ and n‐type carriers. Importantly, we demonstrate circuits that exhibit digital logic operations such as an inverter and an ac ring oscillator.
Junta Directiva del Banco de la República: grandes episodios en 30 años de historia

El libro de Gloria Valencia constituye un magnífico reconocimiento a los actores que crearon el nuevo Banco de la República luego de la Constitución de 1991. Analiza 52 episodios “centrales” en sus 30 años de historia, con base en las Actas de la Junta Directiva, en múltiples documentos internos del Banco, así como en cerca de cincuenta entrevistas a presidentes, dirigentes gremiales, gerentes y a casi todos los codirectores y ministros de Hacienda. Tristemente nos han dejado algunos de ellos: Carlos Ossa, Guillermo Perry y Roberto Junguito (entrevistados para este libro), y Luis Bernardo Flórez y Juan Mario Laserna.
Implementation of Digital Controller TMS320C28027 to MPPT Based Single Phase Bidirectional High Frequency Link Inverter for Photovoltaic Applications

Various digital technologies are being implemented in photovoltaic inverter in order to acquire higher efficiency and to lower total harmonic distortion. In this paper a new topology of implementation of digital controller TMS320C28027 to bidirectional high frequency link photovoltaic inverter has been proposed for photovoltaic application using perturb and observation method. The proposed scheme is simulated and experimentally validated by obtaining the values of total harmonic distortion and efficiency. Normal 0 false false false EN-US X-NONE X-NONE
Do Hedonic or Utilitarian Types of Online Product Reviews Make Reviews More Helpful?: A New Approach to Understanding Customer Review Helpfulness on Amazon

Online sales can be influenced significantly by customer reviews, and thus there are several studies on what makes an online review helpful to consumers. However, none of those researches address the review helpfulness in the context of hedonic and utilitarian review types. This study examines how product type (hedonic and utilitarian) moderates the relationship between the level of review type (hedonicity and utilitarianity) and review helpfulness. To test the moderating effects, customer review data for perfume and bar soap product was collected from Amazon.com and analyzed by using a text-mining tool (QDA Miner) and a structural equation modeling software (AMOS 22.0). The results of this study indicate that the product type moderates the impact of the review type on review helpfulness when product type and review type are incongruent. Further, results show that the number of sentences in a customer review affects the review helpfulness when product type is utilitarian.
An Improved RRT Based Path Planning with Safe Navigation

Path planning has been a crucial problem in robotics research. Some algorithms, such as Probabilistic Roadmaps (PRM) and Rapidly-exploring Random Trees (RRT), have been proposed to tackle this problem. However, these algorithms have their own limitations when applying in a real-world domain, such as RoboCup Small-Size League (SSL) competition. This paper raises a novel improvement to the existing RRT algorithm to make it more applicable in real-world.
Evaluation of residual drift demands in regular multi‐storey frames for performance‐based seismic assessment

This paper summarizes results of a comprehensive analytical study aimed at evaluating the amplitude and heightwise distribution of residual drift demands in multi‐storey moment‐resisting frames after earthquake excitation. For that purpose, a family of 12 one‐bay two‐dimensional generic frame models was subjected to an ensemble of 40 ground motions scaled to different intensities. In this investigation, an inelastic ground motion intensity measure was employed to scale each record, which allowed reducing the record‐to‐record variability in the estimation of residual drift demands. The results were statistically processed in order to evaluate the influence of ground motion intensity, number of stories, period of vibration, frame mechanism, system overstrength, and hysteretic behaviour on central tendency of residual drift demands. In addition, a special emphasis was given to evaluate the uncertainty in the estimation of residual drift demands. Results of incremental dynamic analyses indicate that the amplitude and heightwise distribution of residual drift demands strongly depends on the frame mechanism, the heightwise system structural overstrength and the component hysteretic behaviour. An important conclusion for performance‐based assessment is that the evaluation of residual drift demands involves significantly larger levels of uncertainty (i.e. record‐to‐record variability) than that of maximum drift demands, which suggests that this variability and corresponding uncertainty should be explicitly taken into account when estimating residual drift demands during performance‐based seismic assessment of frame buildings. Copyright © 2006 John Wiley & Sons, Ltd.
Control, Estimation, and Communication Design Applied to ActiveVehicle Safety Systems

Author(s): Xu, Qing | Abstract: This thesis studies the joint design of control, estimation, and communication sys-tems, focusing on their application to active vehicle safety systems. The active safetysystems on-board a vehicle, such as collision avoidance systems, help the driver de-tect and defuse oncoming potential crash situations. They have received signi¯cantattention recently. Wireless communication and estimation are critical componentsof an active safety system enabling the vehicle to be aware of surrounding vehiclesand the roadway. The information provided by the communication and estimationsystems can be used by vehicle control systems such as Cooperative Adaptive CruiseControl (CACC) or driver assistance/warning systems.This thesis makes advances in three areas | a bene¯t analysis of vehicle-vehiclecommunication-aided CACC system in highway tra±c, the design of Medium AccessControl (MAC) protocols for vehicle safety messaging over Dedicated Short RangeCommunication (DSRC), and the real-time estimation of a Markov process over anoisy digital communication channel.We compare the in°uence of adaptive cruise control (ACC) and CACC systems onhighway tra±c behaviors. The main di®erence between the CACC systems and theACC systems is that CACC systems have vehicles interact by exchanging informationthrough communication. Communication is shown to decrease braking e®ort, increaseaverage velocity, reduce congestion, and smooth shock waves. The positive resultsmotivate us to design e±cient communication and estimation systems for vehicleactive safety system.We next study the design of MAC protocols for vehicles to send safety messages toeach other. The target is to send vehicle safety messages with high reliability and lowdelay. We propose and analyze several random access MAC protocols. The protocolsare compatible with the national DSRC multi-channel architecture. Both analyti-cal and simulation results show our approach is feasible for vehicle safety messagesin DSRC. Our best protocol outperforms the popular standard IEEE 802.11 MACprotocol.Finally, we study the real-time estimation of a Markov process over a memorylessnoisy digital communication channel. The problem could model a vehicle estimating3in real time the position, relative velocity, and direction of neighboring vehicles usingthe information obtained by wireless communication. We derive structural resultson the optimal encoder and decoder are derived. A recursive algorithm is given tojointly ¯nd a locally optimal encoder and decoder for the binary symmetric channel.For a memoryless Gaussian vector source and a binary symmetric channel, we ¯ndthe optimal policy and derive the minimum mean squared error as a function of thevariance of the source and the channel noise.
Silicon-based Coulomb blockade thermometer with Schottky barriers

A hybrid Coulomb blockade thermometer (CBT) in form of an array of intermittent aluminum and silicon islands connected in series via tunnel junctions was fabricated on a thin silicon-on-insulator (SOI) film. Tunnel barriers in the micrometer size junctions were formed by metal-semiconductor Schottky contacts between aluminium electrodes and heavily doped silicon. Differential conductance through the array vs. bias voltage was found to exhibit characteristic features of competing thermal and charging effects enabling absolute temperature measurements over the range of ∼65 to ∼500 mK. The CBT performance implying the primary nature of the thermometer demonstrated for rather trivial architecture attempted in this work paves a route for introduction of Coulomb blockade thermometry into well-developed contemporary SOI technology.
Customer interaction on digital economy: a case study

No contexto da economia digital, a interacao com clientes e fundamental para qualquer empresa que pretende ser competitiva a longo prazo. Este trabalho de pesquisa tenta fornecer algumas respostas concretas neste mar de informacoes complexas que e a Internet. O foco e a customizacao dinâmica em web sites voltados para B2B (do ingles, Business-to-Business- o equivalente a transacoes comercias entre empresas via internet) e o objetivo e construir um modelo de analise que caracterize a interacao virtual com clientes. Como operacionalizar o conceito de customizacao dinâmica? Venkatraman (1998) define o conceito baseado em tres principios: modularidade, inteligencia e organizacao. A pesquisa baseia-se no Modelo de Interacao e suas variaveis sao: "Produtos Experenciaveis", Modularidade, Inteligencia Artificial, Organizacao (voltada para o mercado) e Comunidades Virtuais. Foram estudadas duas organizacoes: uma com um produto fisico e outra com um produto virtual, e apresentados resultados de uma pesquisa qualitativa.
Assessing the Vulnerabilities of Mission-Critical Wireless Sensor Networks

Wireless Sensor networks (WSNs) have recently received increased attractiveness driven by many mission-critical applications such as battlefield reconnaissance and homeland security monitoring. Mission critical here refers to networking for application domains whose infrastructure and operations are absolutely necessary for an organization to carry out its mission [1]. Therefore, the main feature that must be guaranteed by all networks running mission critical applications is the network continuity.
Maintenance Generators and Procurement Methods of Sport Facilities in the North Central Nigeria

This study assessed the factors affecting maintenance of the various elements of both indoor and outdoor sports facilities as well as the methods used in of maintaining them. Twenty questionnaires were administered to managers and maintenance officers of the sports facilities in the North Central Nigeria. Relevant factors which where peculiar to each of the facilities where obtained from related literatures and validated. The respondents assessed the effects of the factors on the maintenance of the various facilities. Also, the respondent’s opinion was sort on issues relating to methods used for procurement of maintenance works for the sport facilities, and whether there are variations in efficiency of the facilities based on the procurement methods adopted. The results obtained where analyzed using the Relative Importance Index (RII) and simple percentages. RII was used to determine the degree of significance of each factor and how significantly each element of the sport facility is either being insourced or outsourced. From the results, the effect of the factors on the maintenance of the facilities ranged from “not significant” to “very significant”, depending on the facilities in question. The procurement methods used for maintenance works was mostly a combination of insourcing and outsourcing. It was observed that variations exist in the efficiency of maintenance depending on the method of procurement adopted too. It was recommended that more attention be given to the factors affecting maintenance rather than of attempting to address both at the same time. Also it was recommended that the method of procurement of maintenance works should be dependent on the competencies of the in-house staff available and not by taking such decisions without taking into considerations the capabilities present in-house.
Management Tools for RetD Project Portfolios in Complex Organizations – the case of an international pharmaceutical firm

Project Portfolio Management (PPM) is a growing issue in both professional and academic circles. The typology of Cooper et al. (1998) has pictured the variety of PPM formalized approaches into four types (financial, strategic, scoring and “bubble diagram”). While the use of formalized methods by top performers is clearly attested, the choice of a specific approach and the precise benefits and limits of different instruments are still in debate. The present paper formalizes more precise contingency hypotheses between PPM practices and organizational variables such as R&D strategy, the structure and history of a firm's development, partnership policy and learning track in the project domain. Where managerial implications are concerned, the paper puts forward an analytical framework for the adjustment of portfolio instruments to fit specific situations and develops the conclusions of that framework for an international pharmaceutical group, Merck Lipha. The research underlying this paper adopts an interactive and experimental case-based methodology which has been on-going since 1997.
Healthy Cattle Microbiome and Dysbiosis in Diseased Phenotypes

: Cattle farming is an ancient practice, with roots in the early Neolithic era that has retained its status in the food industry today, with global beef market revenue amounting to $385.7B, as of 2018. Hence, cattle maintenance is naturally essential to cater to nutritional requirements of modern civilization. This extensive review aims to provide a holistic overview of cattle microbiome, analysing the native microbial composition within respiratory tract, gastrointestinal tract, reproductive tract, and skin. The dysbiosis associated with various diseases such as bovine respiratory disease, bovine digital dermatitis, mastitis, Johne's disease, uterine diseases (metritis and endometritis) and metabolic disorders (ruminal acidosis and ketosis) has been discussed. Moreover, various non-antibiotic microbial therapies including phage therapy, prebiotics and probiotics have been examined as potential means to reduce disease-associated dysbiosis. In general, this review highlights the importance of the microbiome in maintenance of health in cattle and its potential in alleviating bovine diseases, with an aim to enhance cattle health and production.
Decentralized control of machines with the use of inductive transmission of power and signal

Industrial manufacturing systems, such as machine tools and robots, require frequent reconfiguration. Conventional cable based systems introduce degradation of connector contacts at each reconfiguration adding noise and reducing reliability. Furthermore, cable based systems are inadequate for some common tasks, such as endless rotational motion. This paper describes a new approach to industrial manufacturing systems using inductive transmission of power and high speed data. The proposed technology for motion controls makes possible, flexible systems built on contactless modular units. High efficiency power transfer and high speed data transfer capabilities have been successfully incorporated in three modular units-rotatable, separable, and linear units-called the Integrated Power and Data Transmitting Units (IPDTU). This unique system structure allows: reliable operation in adverse environments polluted with oil and dirt; frequent reconfiguration without degradation of contacts; more freedom in configuring the machine; and decentralized controls. <<ETX>>
The Innovative Intelligence System—A Tool for Discovering Innovative Opportunities and for Ensuring the Sustainability and Business Prosperity

At present, in the field of building an innovative intelligence system in the company, considerable attention is paid especially to the technological side of this system and the description of its basic elements. The aim of the research is to provide a comprehensive view of building an innovative intelligence system in the company from managerial, information and organizational support. The research consists of questionnaire research and interviews conducted in Slovak companies with the intention to find out the current status of innovative intelligence systems in Slovakia by the content, organization, personnel and information aspects. The authors offer a summary of theoretical knowledge in the field of management—innovative intelligence systems. Summarizing these findings enriches the theoretical basis of management, especially in the field of innovation management. A detailed description of the individual processes, activities and actors of the innovative intelligence system model can serve for a better knowledge of the issue and its successful management. The proposed model of the innovative intelligence system includes the identification of individual actors, their tasks and the decomposition of its main process. The formulated recommendations are a valuable tool for company managers. Adherence to them will ensure the successful implementation and operation of an innovative intelligence system in the company.
A Test for Measuring Transient Characteristics of Tires

Abstract A new method is described for measuring tire cornering stiffness and relaxation length under transient conditions. The hub of the test tire, which is riding atop a rotating drum, is attached to a horizontal beam that is hinged at its other end to permit free lateral motion of the tire. When the tire is given a lateral pulse it oscillates at its natural frequency about the position of zero steer angle. Both cornering stiffness and relaxation length of the tire can be calculated from the frequency and logarithmic decay of the resulting oscillations. Results of this “pendulum” test are compared with those from steady‐state tests and from the sinusoidal steer angle test, which has been the conventional one for measuring transient tire characteristics. Advantages of the pendulum test are pointed out.