Miracle-dz/UniFAR-FTUs huggingface dataset:
Waveguide optical amplifier for telecom applications

In this paper we review progress in optical gain clamped waveguide amplifiers for applications to optical communications. We demonstrate that compact waveguide devices may offer advantages compared to standard fiber amplifiers. In particular we focus on the application of gain clamping and optical burst switching networks where physical impairments may occur due to variation of the input power.
Remediation and Transformation of Kaolin by Plasma Magmavication

In situ plasma magmavication is a powerful and expedient technique for melting soil that subsequently cools to form a glassy igneous rock. A nontransferred arc plasma torch provides temperatures exceeding 4000°C that can be positioned within boreholes as a means of ground improvement or for environmental restoration of contaminated soils. The process is similar to in situ vitrification by embedded graphite electrodes, yet the nontransferred arc is a considerably more efficient process. The artificial rock can be left in place or, alternatively, may be exhumed and stored. The effectiveness of plasma remediation on uncontaminated and contaminated kaolin was investigated through a preliminary series of laboratory chamber tests with small dosages of chemical, biological, and nuclear surrogates. It is believed that the process pyrolizes organic contaminants, while locking the inorganic contaminants within the glass matrix. Measurements in compressive strength, stiffness, porosity, and mass density verified the transformation of soil to rock with improved material characteristics.
A novel compact band‐notched planar monopole antenna from 3 to 40 GHz

A novel and compact ultra‐wideband (UWB) microstrip‐fed monopole antenna with frequency band notch function is presented in this study. Different from the conventional methods, a new method of inserting a lune‐shaped disk into the annular structure to achieve a notched band is proposed in this letter. The center frequency of the notched band can be adjusted with ease by tuning the length of the lune‐shaped disk. The designed antenna satisfies the voltage standing wave ratio (VSWR) requirement of less than 2.5 in the frequency between 3 and 40 GHz while showing the band rejection performance in the frequency band of 4.65 to 5.81 GHz. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1401–1403, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24377
Study on Mechanical Automation with the Torque Limiter Functioned Based on Infrared Interruption

In this research, the verification on the torque limiter is completed by using the mechanism of a torque limiter integrated with the infrared optointerrupter feedback detection. Through a shuttle and an infrared optointerrupter, it is meant to determine whether the rotation mechanism is affected by the mechanism of a torque limiter. With this, it is available to determine if any jamming happens. Through the testing verification of physical mechanisms, the feasibility for the torque limiter proposed by this research is conducted. It can avoid current shorting when dead jamming happens. Also, the detection circuits relevant to the detection of motor current feedback can be saved to reduce systematical circuit maintenance and manufacture torque limiters with long life expectancy, higher stability and low cost.
Analysis of factors influencing the complications of Solitaire AB stent mechanical thrombectomy in patients with acute intracranial artery occlusion

[Abstract] Objective: To investigate the influence factors of hemorrhage and stroke with retriever with Solitaire AB stent in patients with acute intracranial artery occlusion. Methods: A retrospective of 43 cases of patients with acute intracranial artery occlusion for endovascular treatment with Solitaire AB stent enrolled from March 2016 to June 2018 in our hospital, combining the characteristics of the patients of our city, through the clinical baseline data statistical analysis, complications screening of risk factors of complications. Results: There were 81.4% of patients who were dredged totally. The incidences of cerebral hemorrhage and infarction were 18.6% and 16.3%, cerebral hemorrhage group compared with control group, diabetes, blood pressure, revascularized time, NIHSS score, ASPECTS score had statistically significant differences, when infarction group compared with control group, age, opening time, ASITN_SIR score and grade of mTICI had statistically significant differences. Conclusion: Mechanical thrombectomy with Solitaire AB stent in patients with acute intracranial artery occlusion, the occurred of complications associated with various clinical factors, and the occurrence of complications seriously affect the prognosis of patients, therefore, selecting the indications strictly, and adopt individualized treatment to reduce complications.
The Anti-Adhesive Effect of Granulocyte-Colony Stimulating Factor on an Abdominal Adhesion Model in Sprague-Dawley Rats

Background: Intra-abdominal adhesions are among the most common complications following abdominal surgery. In this study, using an abdominal adhesion rat model, we investigated the anti-adhesive effect of granulocyte-colony stimulating factor (G-CSF) on intra-abdominal adhesions. Methods: All rats were laparotomized with 3 ischemic peritoneal buttons developed to cause adhesions. The experimental rats were divided randomly into 3 groups (n=8/group): control, pluronic gel, and G-CSF groups. Fourteen days after surgery, all rats were sacrificed, and intra-abdominal adhesions were assessed. The percentage of adhesions, adhesion severity scale and density of adhesion formation were evaluated. Real-time PCR was conducted to assess the cytokine mRNA levels of substance P (SP), neurokinin 1 receptor (NK-1R), transforming growth factor-β1 (TGF-β1), and intercellular adhesion molecule-1 (ICAM-1). Results: The severity scores of intra-abdominal adhesions of, and the degree of adhesion formation in, rats treated with G-CSF were significantly lower than those in case of rats from other groups. Additionally, in the G-CSF group, the number of ischemic buttons with developed adhesions was significantly lower than that in the other groups. In adhesion samples of the G-CSF group, the expression level of SP was significantly lower than that in the other groups.Conclusions: Our study demonstrated that G-CSF treatment decreases the formation of intra-abdominal adhesion after surgery by reducing inflammatory reactions in adhesion tissues.
Automatic car driving based on fuzzy logic and GNSS

The goal of Intelligent Transport Systems (ITS) is to fully automate driving. ITS is the application of technology to vehicles and roadways to increase safety. Adaptive Cruise Control (ACC) and other assistants are all part of ITS. There is consensus among professionals that developments will move progressively from ACC to automatic driving. In this paper, we resent an approximation to automatic driving, which differs from other developments mainly in that it is based upon global navigation satellite system and artificial vision information. Also the computation for navigation is based on a set of fuzzy logic controllers that manage the vehicle actuators. Mass-produced cars have been instrumented to behave automatically when circulating in private circuits. A fuzzy controller has been designed to manage the vehicle actuators: steering wheel, throttle and brake. Automatic driving tests have been performed, resulting in very human-like vehicle management, in steering as well as speed control.
Self Destructing Electronics

Self-destruct is a mechanism that can cause a device to destroy itself under a predefined set of circumstances. Self-destruct mechanisms are found on devices and systems where malfunction could endanger large numbers of people. Defence advanced research projects agency (DARPA) is an agency of the United States Department of Defense (DoD) responsible for the development of new technologies for use by the military. DARPA announces the Vanishing Programmable Resources (VAPR) program with the aim of revolutionizing the state of the art in transient electronics. DARPA's latest initiative involves the development and manufacturing of electronics, including those for remote sensing and communication, which will be able to self-destruct on command. DARPA has already created transient electronics that vanish in water, with the idea that an injured solider can swallow the device after an injury and it will kill dangerous bacteria, fight infection, and be absorbed harmlessly into the body. These electronics, DARPA suggests, could be used for environmental monitoring and simplified diagnosis, treatment, and health monitoring in the field.
Sex-specific evaluation of macro- and micronutrient intake in adolescents from Porto Alegre/RS, Brazil

INTRODUCTION: Adequate nutrient intake is important for individuals to reach their growth and development potential, especially during adolescence. While most previous studies have assessed the adequacy of food intake based on subject recall, a few have used a food frequency questionnaire validated for a specific population. OBJECTIVES: To evaluate the adequacy of macro and micronutrient intake, according to the DRIs in adolescents using a validated food frequency questionnaire. METHODOLOGY: This cross-sectional study was conducted as part of the Program of Anxiety Disorders in Childhood and Adolescence. In 2013/2014, an analysis of food consumption through the food frequency questionnaire, body composition and biochemical analysis were performed. RESULTS: 38 adolescents (18 boys, 20 girls; mean [± SD] age, 16.66±1.55 years and 16.39±1.62 years; mean body mass index, 21.23±3.7 and 22.61±4.09 kg/m 2 , respectively) were analyzed. A high prevalence of inadequate intake of folate (in 50% of boys and 65% of girls according to Estimated Average daily requirements (EAR), and sodium intake higher than the Tolerable Upper Intake Level (UL) in 88.89% of boys and 85% of girls were verified. Girls exhibited a high prevalence of inadequate calcium intake (55%). Macronutrient intake, however, was within acceptable distribution ranges. CONCLUSIONS: Inadequate intake of folate and higher sodium intake were observed in both sexes, whereas inadequate calcium intake was observed only in girls. The occurrence of these inadequacies during adolescence can lead to lifelong health problems. It is especially concerning in girls because these inadequacies can cause serious consequences during pregnancy and, in turn, to the health of offspring.
Influence of the channel width on the threshold voltage modulation in m.o.s.f.e.t.s

The threshold vollage of an m.o. s. field-effect transistor is modulated by the source-to-substrate reverse bias. In the letter, the theory for long- and short-channel transistors is extended to include the influence of the channel width. The result is an analytical expression for the threshold voltage as a function of geometry and bias that agrees well with experimental data.
Scheduling and process planning for multiple material stereolithography

Purpose – To operate a multiple material stereolithography (MMSL) system, a material build schedule is required. The purpose of this paper is to describe a scheduling and process‐planning software system developed for MMSL and designed to minimize the number of material changeovers by using low‐viscosity resins that do not require sweeping.Design/methodology/approach – This paper employs the concept of using low‐viscosity resins that do not require sweeping to minimize the number of material changeovers required in MMSL fabrication. A scheduling and process‐planning software system specific to MMSL is introduced that implements four simple rules. Two rules are used to select the material to be built in the current layer, and two rules are used to determine at which layer a material changeover is required. The schedule for the material to be built depends on the material properties stored in a user‐defined materials library. The developed algorithm produces sliced loop data for each material using the pred.
Smart LED light source driver for machine vision system

The unique properties of LEDs offer significant advantages in terms of lifetime, intensity and color control, response time and efficiency, all of which are very important for illumination in machine vision applications. However, there are some drawbacks of LEDs, such as the high thermal dependency and temporal degradation of the intensity and color. Dealing with these drawbacks requires complex LED drivers, which are able to compensate for the abovementioned changes in the intensity and color, thereby maintaining higher stability over a wide range of ambient temperature throughout the lifetime of a LED light source. Moreover, state-of-the-art machine vision systems usually consist of a large number of independent LED light sources that enable real-time switching between different illumination setups at frequencies of up to 100 kHz. In this paper, we discuss the concepts of smart LED drivers with the emphasis on the flexibility and applicability. All the most important characteristics are being considered and discussed in detail: the accurate generation of high frequency waveforms, the efficiency of the current driver, thermal and temporal stabilization of the LED intensity and color, communication with a camera and personal computer or embedded system, and practicalities of implementing a large number of independent drive channels. Finally, a practical solution addressing all of the abovementioned issues is proposed with the aim of providing a flexible and highly stable smart LED light source driver for state-of-the-art machine vision systems.
Multi-level LINC transmitter with non-isolated power combiner

By using a non-isolated power combiner, the overall power efficiency can be improved by reducing the wasted power at the combined out-phased signal. To further improve the efficiency of the low-power mode, a multi-power mode out-phasing power amplifier (PA) is proposed with load modulation by switches. Compared with the conventional linear amplification using nonlinear component (LINC) transmitter, the proposed multi-level LINC improves the power-added-efficiency more than 40% for a 7 dB peak-to-average power ratio orthogonal frequency division multiplexing signal. To the authors' knowledge, the proposed LINC PA is the first multi-level LINC PA without multiple power supplies.
Short-pulsed laser transport in absorbing and scattering media: time-based versus frequency-based approaches

Optical tomography (OT) is a promising non-intrusive characterization technique of absorbing and scattering media that uses transmitted and/or reflected signals of samples irradiated with visible or near-infrared light. The quality of OT techniques is directly related to the accuracy of their forward models due to the use of inversion algorithms. In this paper, forward models for transient OT approaches are investigated. The system under study involves a one-dimensional absorbing and scattering medium illuminated by a short laser pulse; this problem is solved using a discrete ordinates–finite volume (DO–FV) method in both time and frequency domain. Previous works have shown that time-domain approaches coupled with first order spatial interpolation schemes cannot represent the physics of the problem adequately as transmitted fluxes emerge before the minimal physical time required to leave the medium. In this work, the Van Leer and Superbee flux limiters, combined with the second order Lax–Wendroff scheme, are used in an attempt to prevent this. Results show that despite significant improvement, flux limiters fail to completely eliminate the physically unrealistic behaviour. On the other hand, results for transmittance obtained from the frequency-based method are accurate, without physically unrealistic behaviours at early time periods. The frequency-dependent approach is however computationally expensive, since it requires approximately five times more computational time than its temporal counterpart when used as a forward model for transient OT. On the other hand, the great advantages of the frequency-based approach is that limited windows of temporal signals can be calculated efficiently (in transient OT), and it can also be used as a forward model for steady-state, frequency-based and transient OT techniques.
Construction-Safety Best Practices and Relationships to Safety Performance

AbstractThe construction industry has experienced a great deal of safety improvement after the Congress passed the Occupational Safety and Health Act in 1970. In the last twenty years, improvements have been made largely due to safety interventions that exceed compliance with government regulations. Researchers have long attempted to identify the most effective safety programs. However, studies in the past focused only on a small subset of potential injury-prevention options. In addition, to date, there has yet to be a study that documents a comprehensive list of safety strategies implemented by industry-leading companies. This research addresses this knowledge gap by creating a comprehensive list of construction-safety strategies from relevant literature and supplementing it with input from an expert panel. Once the strategies were identified (n=104), the research team conducted interviews with representatives from 57 projects in the United States to determine which strategies were implemented on each pr.
Modeling of Lamb wave propagation with elastodynamic finite integration technique

This paper presents the numerical modeling of the Lamb wave propagation in thin plates with the elastodynamic finite integration technique (EFIT) and its validation with the measured results. In general, Lamb waves offer an attractive method to detect the defects inside long plate like structures efficiently. However, such a nondestructive testing (NDT) requires profound understanding of the Lamb wave propagation in the plates, generation of the symmetric and anti-symmetric modes of different orders and their interaction with the defects of the materials. Modern simulation tools based on numerical methods such as the finite integration technique (FIT), the finite element method (FEM) and the boundary element method (BEM) can be used to model this NDT situation. The elastodynamic finite integration technique (EFIT) is an effective tool to model Lamb wave propagation in plates over long distances in an efficient way. With the help of the simulation results obtained from the EFIT tool the propagation of different symmetric and anti-symmetric modes is analyzed and thus a proper technique is developed to excite different modes and to separate them from each other precisely. A validation of the numerical results with the analytical results is also presented.This paper presents the numerical modeling of the Lamb wave propagation in thin plates with the elastodynamic finite integration technique (EFIT) and its validation with the measured results. In general, Lamb waves offer an attractive method to detect the defects inside long plate like structures efficiently. However, such a nondestructive testing (NDT) requires profound understanding of the Lamb wave propagation in the plates, generation of the symmetric and anti-symmetric modes of different orders and their interaction with the defects of the materials. Modern simulation tools based on numerical methods such as the finite integration technique (FIT), the finite element method (FEM) and the boundary element method (BEM) can be used to model this NDT situation. The elastodynamic finite integration technique (EFIT) is an effective tool to model Lamb wave propagation in plates over long distances in an efficient way. With the help of the simulation results obtained from the EFIT tool the propagation of diff.
Potencial migração de Helicoverpa armigera (Lepidoptera: Noctuidae) para áreas produtoras de cultivos hospedeiros do Estado de São Paulo.

Resumo: A praga exotica polifaga Helicoverpa armigera (Hubner, 1808) (Lepidoptera: Noctuidae) foi detectado no Brasil em 2013 em lavouras de algodao, milho e soja, localizados nas regioes nordeste e centro-oeste. A rapida dispersao do inseto pode ser constatada, posteriormente, pelos danos causados a cultivos diferenciados em diferentes estados brasileiros, principalmente em areas de presenca do Bioma Cerrado. As caracteristicas fisicas de H. armigera favorecem sua grande capacidade de voo (100-1000km), elevando seu potencial para dispersao por voos migratorios das areas ja atacadas. Massas de ar brasileiras devem ser consideradas por potencialmente facilitar a atividade migratoria do inseto a longas distâncias, para areas de maior concentracao de seus cultivos hospedeiros preferenciais. Este trabalho avaliou o potencial de migracao de H. armigera para areas produtoras de cultivos hospedeiros do estado de Sao Paulo, considerando seus municipios produtores de algodao, soja, milho, tomate, feijao, cafe e laranja, bem como as principais massas de ar brasileiras, as areas com cultivos de eucalipto e pinus (potenciais barreiras fisicas) e a localizacao do Bioma Cerrado paulista. Informacoes das areas produtoras disponibilizadas para 2012 pelo IBGE foram utilizadas, assim como realizado o cruzamento de informacoes em ArcGis 10.3. Um mapa identificando areas de maior potencial de infestacao/reinfestacoes de H. armigera no estado de Sao Paulo e apresentado como resultado, para orientar monitoramentos e estrategias de MIP locais.
AdaBoost Ensemble Learning on top of Naive Bayes Algorithm to Discriminate Fake and Genuine News from Social Media

There is a continuous increase in social media usage and a huge interaction takes place between users. In this context, fake news circulation or flood becomes a real thread for social media users from various perspectives. Fake news is defined as presentation of misleading information as true news. In this view, fake news is fabricated news that aims to manipulate public opinion to obtain a benefit. For example, increasing readership for profiting through clickbaits is such an aim. Social media users are manipulated through attention grabbing headlines or web-links to increase number of visitors. Therefore, an automated fake news identification model can be used by social media users to filter inadvertent web-traffic. For this goal machine learning algorithms are used in the literature as a solution for fake news problem. In machine learning literature, advancing performance of the base models is crucial. Ensemble learning is one of the key solutions to enhance model efficiency. In this work, we first generated a set of baseline machine learning algorithms and we tested them in terms of their fake news identification ability. We then made use of ensemble learning strategy to further enhance obtained results. More precisely, we obtained Naïve Bayes Multinomial classifier as the best fake news predictor having 96.74 % accuracy. We then further improved this prediction ability to 98.2 % by applying an AdaBoost ensemble learning strategy.
A note on productivity gains in flexible robotic cells

Flexible robotic cells combine the capabilities of robotic flow shops with those of flexible manufacturing systems. In an m-machine flexible cell, each part visits each machine in the same order. However, the m operations can be performed in any order, and each machine can be configured to perform any operation. We derive the maximum percentage increase in throughput that can be achieved by changing the assignment of operations to machines and then keeping that assignment constant throughout a lot's processing. We find that no increase can be gained in two-machine cells, and that the gain in three- and four-machine cells each is at most 14 $$\frac{2}{7}$$%.