Physical Sciences and Engineering

The financial resources available for infrastructure maintenance and rehabilitation are always limited thus creating a need for efficient resource management and for the ability to predict maintenance actions throughout the infrastructure service period. Service life prediction has assumed a primary role as it allows a more rational use of construction elements and serving as a useful tool in the definition of preventive maintenance plans providing an increase in performance of various building element especially those used in the facades.

The objective of this work was to evaluate the weed seed bank in pasture area. The experiment was carried out at the Federal University of Alagoas, in 2018, with soil from Lagoa do Ouro, Pe. For seed bank evaluation, 20 soil samples were collected in pasture area. For seed bank determination, seedlings emerged from the trays, whose identification and counting were determined at 15, 30, 45, 60, 75 and 90 days after the implementation of the experiment.

The application of electromagnetic ultrasonic guided wave detection technology in cylindrical pipe detection was studied and analyzed.The basic theoretical relations of axial guided wave are analyzed and deduced. The dispersion characteristics of axial guided wave are analyzed emphatically.

This paper investigates current state-of-the-art LSB based image steganography techniques and tools. The LSB substitution of the image pixels selected sequentially or randomly is the most commonly used spatial domain technique and provides high embedding payload (Li, et al., 2011). It is substitutes secret data bits into least significant bits of cover object to generate the stego image. LSB is one of the most frequently used method because of fine concealment, high capability of hidden information and easy implementation.

Primed naming paradigms have shown that the semantically associated noun primes facilitate naming speed of noun targets. However, few studies controlled for co-occurrence when developing prime-target stimuli, which might have provided a boost in facilitation due to phonological activation between the prime and target. Also, there is limited information about how verb primes affect noun naming.

The mortars produced currently have adhesion and mechanical resistance and physical properties often unsatisfactory to cater for projects with large loads and environmental conditions more severe. This work aims to study the mechanical properties and durability of coating mortars produced with excessive lime or cement. Tests were carried out air incorporated content; resistance to compression, flexion traction and pull off; elasticity modulus; water absorption; porosity, fissurability e digital microscope images. It was CP-II-E-32 cement, CH-I lime and quartz natural sand.

The objective was to compare the morphological adaptations and the capacity to generate force promoted by the tensional versus metabolic resistance exercise. The sample consisted of 28 men, between 18 and 45 years old, resistance exercise practitioners divided into two groups. Anthropometric evaluation and maximal strength test were performed before and at the end of the training period. The hypertrophic responses were intensified by the metabolic method and the ability to generate force by the tension-base method.

O objetivo deste trabalho foi ajustar modelos de regressão matemática para estimar a área foliar de carambola (Averrhoa carambola L.) a partir das dimensões lineares da superfície foliar. Ao todo, 400 folhas foram digitalizadas e processadas através do software ImageJ®, sendo obtidas as medidas do comprimento (C) ao longo da nervura central, maior largura (L), produto da multiplicação do comprimento com a largura (CL) e a área foliar observada (AFO).

Mediation analysis is a statistical tool used to study how the effect of an independent variable on an ending is transmitted through a mediator. A moderator is a variable that transform the sign or strength of the effect of an independent variable on a dependent variable. To test single mediator model Structural Equation Modeling is used and also to estimate the rapport between multiple mediator, outcome and the moderator. This article gives an idea of meditation and the review is based on the book of statistical mediation and authors perceptive.

Objetivo: Analisar a ação antifúngica do óleo essencial de Pogostemon cablin (Lamiaceae) contra cepas de Candida krusei. Métodos: Foi desempenhada a técnica de microdiluição em caldo para obtenção da CIM (Concentração Inibitória Mínima) e da CFM (Concentração Fungicida Mínima) do óleo de Pogostemon cablin. Resultados: Diante dos resultados obtidos para o óleo testado denotou uma concentração inibitória mínima de 32 μg/mL para três das quatro cepas testadas. Já para a CFM os valores foram os mesmos que a CIM, para as respectivas cepas.