Miracle-dz/UniFAR-FTUs huggingface dataset:
Otimização do método Cembureau de ensaio de permeabilidade ao gás para materiais cimentícios

A permeabilidade dos fluidos no interior do concreto regula praticamente todos os mecanismos de deterioracao do material e, por isso, consiste numa propriedade muito importante para a durabilidade das estruturas de concreto. O presente trabalho contextualiza-se na linha de pesquisa de tecnologia e ciencia dos materiais, detendo-se principalmente ao parâmetro de permeabilidade ao gas do concreto. O metodo Cembureau e um metodo de ensaio de permeabilidade ao gas amplamente utilizado na literatura, no entanto consiste numa rotina trabalhosa que torna o ensaio moroso e pouco flexivel. Logo, buscou-se definir um processo de pre-condicionamento e de ensaio simplificado, utilizando o metodo Cembureau como referencia na comparacao e validacao dos resultados. O objetivo e contribuir com a popularizacao do parâmetro de permeabilidade ao gas e de um metodo de ensaio mais pratico e viavel, visando os inumeros beneficios que podem ser gerados ao meio tecnico e cientifico, incluindo a concepcao de uma normativa nacional que proporcione prescricoes quanto as etapas e condicoes para determinacao de tal parâmetro. O programa experimental tambem envolveu ensaios de caracterizacao do concreto no estado fresco, bem como a determinacao da absorcao total e por capilaridade, permeabilidade a agua, resistencia a compressao e modulo de elasticidade. Para a elaboracao do metodo de ensaio simplificado de permeabilidade ao gas, foram estabelecidas variacoes quanto ao processo de pre-condicionamento, ao tempo de redistribuicao e a faixa de pressoes utilizada durante o ensaio, para dois tipos de concreto. Por meio de analises estatisticas dos resultados, foram sugeridas simplificacoes referentes ao processo de pre-condicionamento (em câmara climatica ate a constância de massa) e ao tempo de redistribuicao da umidade (de 14 para 7 dias). O procedimento simplificado ofereceu os melhores resultados em termos de precisao e variabilidade, quando comparado ao metodo Cembureau e, alem disso, foi julgado como mais pratico e flexivel que o metodo de referencia, sendo recomendado em sua substituicao. Os resultados evidenciaram melhoria da qualidade do concreto com a reducao da relacao a/lig, tanto em relacao as propriedades de transporte de massa, quanto as propriedades mecânicas, ratificando os resultados da literatura tecnica em geral. Os resultados mostraram que a permeabilidade a agua e ao gas do concreto podem diferir significativamente e tratam-se de processos diferentes. Comparativamente, a utilizacao de gas no ensaio e de mais facil e rapida execucao e distinguiu melhor o desempenho relativo entre os dois concretos, sugerindo maior sensibilidade relativa ao ensaio. Finalmente, como principal contribuicao para investigacoes futuras de materiais cimenticios, e feita a recomendacao de um metodo simplificado de pre-condicionamento para ensaio de permeabilidade ao gas.
Dynamics of an N-Species Gilpin–Ayala Impulsive Competition System

Abstract In this paper, we consider an N-species Gilpin–Ayala impulsive competition system. By using comparison theorem, Lyapunov functional, and almost periodic functional hull theory of the impulsive differential equations, this paper gives some new sufficient conditions for the permanence, global asymptotical stability, and almost periodic solution of the model. Our results extend some previously known results. The method used in this paper provides a possible method to study the permanence, global asymptotical stability, and almost periodic solution of the models with impulsive perturbations in biological populations.
Prevalencia del síndrome metabólico (SM) en pacientes con psoriasis

La psoriasis es una enfermedad inflamatoria cronica asociada a un aumento en el riesgo cardiovascular. El SM constituye un factor predictor para riesgo cardiovascular. Objetivo: Determinar la prevalencia del SM asociado a psoriasis en una poblacion mexicana. Metodologia: Estudio descriptivo de casos y controles, constituido por 209 sujetos. Se obtuvo, de todos los participantes, informacion demografica, clinica, antropometrica y de laboratorio. Se realizo el diagnostico de SM de acuerdo con la definicion del National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III). Resultados: Se incluyeron 103 pacientes con psoriasis y 106 controles. La edad media del grupo con psoriasis fue de 48.37 anos; el 55% fueron mujeres y el 46%, hombres. La prevalencia del SM en el grupo con psoriasis fue del 41.7%, frente al 20% en el grupo control (p < 0.001; odds ratio [OR]: 1.738; intervalo de confianza [IC] 95%: 1.194-2.531). Asimismo, se encontro una mayor frecuencia de diabetes mellitus (DM) (17.3 vs 6.6%; p = 0.001) y alcoholismo (8.7 vs 0.9%; p = 0.009), asi como niveles mas elevados de tension arterial sistolica (TAS) (p = 0.002), indice de masa corporal (IMC) (p = 0.016), circunferencia de cintura (CC) en mujeres (p = 0.008) y trigliceridos (TG) (p = 0.002). Conclusiones: Los pacientes con psoriasis presentan una frecuencia mayor de SM y de algunos de sus componentes individuales, que pueden favorecer el desarrollo de eventos cardiovasculares futuros
Effects of Phytoncides Inhalation on Serum Cortisol Level and Life Stress of College Students

Purpose: The purpose of this study was to identify the effects of the phytoncides on serum cortisol level, vital signs and life stress of college students. Methods: This study was nonequivalent control group non-synchronized design. The subjects consisted of 60(control group: 28, experimental group: 32). The phytoncides mixed the pine(pinus sylvestris) oil with the cypress(cupressus sempervirens) oil in the same rate. In the experiment, it was put in an aroma-necklace bottle and inhaled 3 times per day(9AM, at noon, before going to bed) for 2 weeks. The data were analyzed by the SPSS version 12.0 program. Results: In the experimental group systolic BP(F=15.603, p=.000), diastolic BP(F=29.489, p=.000) and serum cortisol level(F=4.968, p=.000) were significantly decreased. Conclusion: The phytoncides inhalation is a partly help to reduce college students' life stress. The phytoncides is the incense of the familial tree. We recommended to examine what differences between the green shower and the phytoncides inhalation for the stress reduction.
Recurrence in non-autonomous dynamical systems

ABSTRACT We consider a sequence of continuous maps on a compact metric space X uniformly converging to a function f. This sequence forms a non-autonomous discrete dynamical system. In such case, the set of omega-limit points is invariant with respect to the limit function f. Here we give negative answer to questions whether the sets of recurrent points and non-wandering points are also invariant. We also discuss the relation of the set of recurrent points of and its limit function f.
Guest Editorial for the Special Issue on Wireless Real-time Health Monitoring Technology for Personalized Medicine

Recent global focus on healthcare has stimulated research and development of innovative technologies which address many sustainability issues of the current healthcare provision models. Rapid advances in mobile, wireless, and sensing technologies have enabled new opportunities in healthcare, enabling cost-effective and efficient healthcare delivery in home, hospital, assisted living, and nursing home settings [1] . Remote diagnosis, patient and elderly monitoring, sensing of vital parameters of people suffering from chronic diseases such as asthma, diabetes, neurodegenerative and cardiovascular diseases, are just a few examples.
Service Robot Design for Uses in Human Centered Environments

This paper presents the development of a service robot platform for various assistive tasks in human-centered environment. The main design objective is to enable the robot to safely navigate indoor areas and to provide cross-platform accessibility to human-users. To accomplish the goal, two technical design requirements which include the rough-terrain locomotive mechanism and the web-server based operating system are addressed and explored in this study. First, the overall control system architecture of the robot which consists of three different layers (human-interaction, environment-interaction and movement) is presented. Then, the mechanical and electronic specification of the robot’s dual drive system and the power management system are described with their design process. The robot’s software platform (which consists of the server, client and real time controller) is also provided for the selected service task. Last, the built platform is tested and evaluated through experimentations in the real world settings.
Fast and ultrafast electron microscopies for skyrmions and plasmonics

In recent years, topology gained a central role in physics. We learnt that energetics could be often explained better by classes of objects defined by having qualitative differences. In today’s jargon, we say they are topologically distinct. The process of creation and annihilation of physical objects with topological charge has peculiar aspects, because it cannot proceed by continuous deformations. The consequent protection of these physical states against internal and external perturbations can therefore be striking. In condensed matter, topologically-protected states are found in electronic systems in solids, spin textures, and particle or quasiparticle wave functions. Because of their general reluctance to change topological state, methods to manipulate their topological charge should be thoroughly designed. In this dissertation, I illustrate dynamical manipulation of a topological charge in two distinct –yet connected– research areas: nanoscopic spin textures and free electrons. In both cases, the manipulation is performed via the interaction of ultrashort light packets with the system under investigation. In the first, topologically nontrivial spin vortices, called skyrmions, are injected and controlled by the laser pulses. In FeGe, Bloch-type skyrmions are investigated via static, in-situ, and time-resolved Lorentz electron microscopy. Spin supercooling has been found responsible for the creation and stabilization of skyrmions in large regions of the phase diagram, controlling the amount of topological charge in the material. The cooling rate ensuing from the excitation of the material with strong laser pulses can reach tremendous values. This work enabled an estimate of the speed limit for laser-induced writing and erasing of such skyrmionic states. In the second case, circularly-polarized light is used to convert an electron plane wave into an electron vortex with nonzero topological charge. A chiral plasmon photoinduced at the edges of a nanohole in a metal transfers the vortex phase structure to the electron beam via stimulated plasmon absorption and emission. In a wider picture, the precise tailoring of the free electron wave function can be obtained by electron-photon inelastic scattering in proximity of a physical object, as extensively discussed in this thesis. The new awareness of our tools to control matter waves led to the implementation of an innovative type of time-domain holography, which can be used to image nanoscopic, propagating electromagnetic fields.
Updating Model of Software Component Trustworthiness Based on Users Feedback

The software trustworthiness measurement is one of the hot topics. Software component technology is the mainstream technology of software development. How to get the trustworthy degree of software component efficiently and accurately is a challenging issue for the component-based software development. Getting the trustworthy degree of software component needs many users’ success cases. In this paper, we propose an updating model of software component trustworthiness. First, the trustworthy degree of the software component is computed based on users’ feedback. Then, the weight of updating is determined by the number of users. Finally, the method of cluster different companies is based on the Euler distance. A case study shows that the method is reasonable and effective.
Dynamic Control of Fraud Information Spreading in Mobile Social Networks

Mobile social networks (MSNs) provide real-time information services to individuals in social communities through mobile devices. However, due to their high openness and autonomy, MSNs have been suffering from rampant rumors, fraudulent activities, and other types of misuses. To mitigate such threats, it is urgent to control the spread of fraud information. The research challenge is: how to design control strategies to efficiently utilize limited resources and meanwhile minimize individuals’ losses caused by fraud information? To this end, we model the fraud information control issue as an optimal control problem, in which the control resources consumption for implementing control strategies and the losses of individuals are jointly taken as a constraint called total cost, and the minimum total cost becomes the objective function. Based on the optimal control theory, we devise the optimal dynamic allocation of control strategies. Besides, a dynamics model for fraud information diffusion is established by considering the uncertain mental state of individuals, we investigate the trend of fraud information diffusion and the stability of the dynamics model. Our simulation study shows that the proposed optimal control strategies can effectively inhibit the diffusion of fraud information while incurring the smallest total cost. Compared with other control strategies, the control effect of the proposed optimal control strategies is about 10% higher.
Analog Performance and its Variability in Sub-10 nm Fin-Width FinFETs: a Detailed Analysis

This paper discusses in detail the effects of Sub-10nm fin-width (<inline-formula> <tex-math notation="LaTeX">$\text{W}_{fin}$ </tex-math></inline-formula>) on the analog performance and variability of FinFETs. It is observed through detailed measurements that the trans-conductance degrades and output conductance improves with the reduction in fin-width. Through different analog performance metrics, it is shown that analog circuit performance, in Sub-10nm <inline-formula> <tex-math notation="LaTeX">$\text{W}_{fin}$ </tex-math></inline-formula> regime, cannot be improved just by <inline-formula> <tex-math notation="LaTeX">$\text{W}_{fin}$ </tex-math></inline-formula> scaling but by optimizing source/drain resistance, gate dielectric thickness together with the <inline-formula> <tex-math notation="LaTeX">$\text{W}_{fin}$ </tex-math></inline-formula> scaling. We also explored the effect of process induced total and random variability on trans-conductance and output conductance of FinFETs. A systematic strategy to decouple different variability sources has been discussed and it is shown that mobility, source/drain resistance and oxide thickness are the critical parameters to reduce variability.
A K-NEAREST ALGORITHM BASED APPLICATION TO PREDICT SNMPTN ACCEPTANCE FOR HIGH SCHOOL STUDENTS IN INDONESIA

Abstract— Seleksi Nasional Masuk Perguruan Tinggi Negeri (SNMPTN) is one of the acceptances to enrol public universities which held simultaneously throughout Indonesia. In Indonesia, there is no application that can assist high schools in predicting the student acceptance to public universities yet. In this study, we propose an application that can predict SNMPTN results based on learning data. This prediction application will identify data-driven based on the SMAN 8 Jakarta alumni’s report cards accepted and not accepted in SNMPTN. The data is from the average scores within semesters 1 until 5 of alumni data as training data in the classification process. We compare the training data with two testing data models (training data itself and 10-folds cross validation) as testing data. The algorithm that is used for this study is K-Nearest Algorithm. The result shows that the optimal parameters to gain good prediction only involve 5 parameters, they are the average score of semester 1, the average score of semester 2, the average score of semester 3, the average score of semester 4, and the average score of semester 5. The results show good accuracy, 80% for evaluating the science majoring alumni’s data itself with K=3 and 89% for evaluating the social science majoring alumni’s data itself with K=3. The prediction is then applied in a web-based application which is developed utilizing the Relational Unified Process Framework. From this study we also find out that there are 5 out of 8 parameters that can be used in the SNMPTN prediction, they are average score in semester 1 until semester 5. Keywords— Seleksi Nasional Masuk Perguruan Tinggi Negeri (SNMPTN), Public University, Predicting, Classification, K-nearest Neighbour Algorithm
A numerical method for a nonlinear structured population model with an indefinite growth rate coupled with the environment

A numerical method is developed for a general structured population model coupled with the environment dynamics over a bounded domain where the individual growth rate changes sign. Sign changes notably exhibit nonlocal dependence on the population density and environmental factors (e.g., resource availability and other habitat variables). This leads to a highly nonlinear PDE describing the time‐evolution of the population density coupled with a nonlinear‐nonlocal system of ODEs describing the environmental time‐dynamics. Stability of the finite‐difference numerical scheme and its convergence to the unique weak solution are proved. Numerical experiments are provided to demonstrate the performance of the finite difference scheme and to illustrate a range of biologically relevant potential applications.
Indicators Basis for Functional Shape Analysis

Step functions are widely used in several applications from geometry processing and shape analysis. Shape segmentation, partial matching and self similarity detection just to name a few. The standard signal processing tools do not allow us to fully handle this class of functions. The classical Fourier series, for instance, does not give a good representation for these non smooth functions. In this paper we deﬁne a new basis for the approximation and transfer of the step functions between shapes. Our deﬁnition is fully spectral, allowing for a concise representation and an efﬁcient computation. Furthermore our basis is speciﬁcally built in order to enhance its use in combination with the functional maps framework. The functional approach also enable us to handle shape deformations. Thanks to that our basis achieves a large improvement not only in the approximation of step functions but also in the transfer, exploiting the functional maps framework. We perform a large set of experiments showing the improvement achieved by the proposed basis in the approximation and transfer of step functions and its stability with respect to non isometric deformations
Enlarge-Tapered, Micro-Air Channeled Cavity for Refractive Index Sensing in SMF

We report a compact, highly sensitive all SMF refractive index (RI) sensor based on a waist enlarged tapered (WET) fiber probe with a micro-air cavity (MAC) located at the tip. The fabrication of WET probe has been accomplished using a commercial splicer machine and the MAC has been realized using ultrashort pulsed laser based micromachining. The WET fiber section facilitates excitation of cladding modes while the MAC in conjunction with the curved tip, provides a convenient platform for achieving core mode as well as cladding mode interference within the probe. The probe, with an optimized WET fiber section, exhibited maximum refractive index (RI) sensitivity of 123.7 nm/RIU with a negligible temperature sensitivity of 15.34 pm/°C.
Adaptive quantised control for switched uncertain nonlinear systems with unknown control directions

This paper is concerned with the problem of global state-feedback regulation for a class of switched uncertain nonlinear systems with quantised input and unknown control directions under arbitrary switchings. A hysteretic quantiser is introduced to avoid actuator chattering. The powers of all subsystems are positive odd rational numbers and depend on the switching signals. Incorporating Nussbaum-type gain technique into adding a power integrator approach, a new adaptive controller is designed to guarantee that all the signals of the closed-loop system are bounded and the system state is globally asymptotically regulated to zero. An example is given to illustrate the validity of the proposed control scheme.
Species Diversity of Entomopathogenic Fungi Infecting the Sugarcane Aphid Melanaphis sacchari: A Recently Introduced Pest in Mexico

The sugarcane aphid, Melanaphis sacchari, is a key pest that affects sorghum in Mexico. During 2014 to 2016, in South of Tamaulipas sites and Bajio region in Guanajuato, the populations of this aphid were infected by different species of Hypocrealean fungi. Based in the morphometric identification and molecular characterization, the species associated with sugarcane aphid in South of Tamaulipas were Lecanicillium longisporum, Beauveria bassiana and Isaria javanica. In this region, the higher infection levels were caused by L. longisporum, mortality range from 30.0% to 50.0%. The presence of I. javanica and B. bassiana represented less than 26.0% and 10.0%, respectively. In Guanajuato, the species found corresponded to L. longisporum and B. bassiana. The infection levels of both species in sugarcane aphid populations in Guanajuato sites were less than 1.00%. The natural occurrence of entomopathogenic fungi on sugarcane aphid populations was associated with climactic factors such as temperature and relative humidity and development of infections was possibly affected by abiotic factors such as crop phenological stage and applications of chemical insecticides realized by farmers for control of this aphid. Further studies on the ecology and physiology of these fungi and trials to determine virulence and persistence in M. sacchari populations are needed. This is the first report on natural presence of L. longisporum, B. bassiana and I. javanica causing disease on Melanaphis sacchari in Guanajuato and Tamaulipas, Mexico.