Physical Sciences and Engineering

Subject description: Groundnuts (Arachis hypogaea L.) occupy an important place in traditional farming systems. However, yields in dry African savannas are less than one ton per hectare in extensive cultivation. These low yields are due, among other things, to precarious rainfall conditions, to the low distribution of improved varieties, but also to the non-development of local plant potential. In fact, compared to local cultivars, very few studies have been made.

The study aimed to investigate the impact of blended learning on students’ speaking skills of EFL learners through debate and extempore technique. The study used quasi-experiment which consisted of pre-observation, intervention and post observation. The total of 20 girls and 22 boys studying in grade 6 has participated in the study. The control group received traditional methods of instructions in English session whereas the experimental group received blended learning in special classroom. Both the groups were tested for their speaking skills before and after the intervention.

This article presents the results obtained in the implementation of computer tools in the teaching of trigonometry in 11th grade at Liceu in Cabinda. Trigonometry is a branch of mathematics used to calculate the Earth's diameter, river widths, distances to make maps, pyramid measurements, algebraic calculations, among others.

Background: In the last years there were a huge differences in the ADL life style within Egyptian citizens by using transportation rather than walking, preferring to resting rather than moving and making sport. These changes in life style may reflect on the lower limb range of motion. Purpose:To have a standard normal value for lower limb's range of motion for Egyptian subjects. Materials and methods: 1000 normal Egyptian male and female subjects aged between 21 and 50 years, free from any conditions cause limitation joint mobility, enrolled in the study.

This article presents the results of a research carried out in the 2nd year students at ISCED in Cabinda, on the teaching-learning process of triple integrals with the integration of Maple Mathematical Software.

This article presents the results of a research carried out on the use of GeoGebra Mathematical Assistant in the teaching-learning process of differential calculus. This content deals with variation, movement, quantities that change and depend on other quantities, being considered by manypeopleasone of the great achievements of the human intellect. Differential calculus has a derivative concept considered fundamental for its study, as it is a linear operator, which forms a new function from the original, in which each point of the new function is the displacement of the original one.

Mechanical neck pain (MNP)affects approximately two thirds of the population in the middle age due to poor postural habits. Purpose: to compare the effect of pulsed electromagnetic field versus pulsed ultrasound on pain intensity, cervical range of motion and functional restriction in treating patients with MNP. Design: randomized controlled trial. Methods: 45 patients with MNP participated in this study.

A Linear Wireless Sensor Network (LWSN) is a grouping of sensors arranged in a linear topology with or without junction zones. LWSNs are applied in several areas involving, among others, gas pipelines, road or rail infrastructure, border surveillance infrastructure, waterways, oil, etc. The (LWSN) are subjected to the same constraints as those subjected by the traditional networks (non-linear), energy saving, overload, delays, latency etc.

In the current research work, MgO-NiO nano composite thin films have been prepared on glass substrate by using thermal evaporation technique and studied electrical and gas sensing properties of prepared films. The prepared films were annealed for 2 hours at 350°C in a muffle furnace. The electrical properties of prepared MgO-NiO nano composite thin films were investigated on the basis of resistivity, Temperature Coefficient Resistance (TCR) and activation energy.

Background: Poor nutrition in pregnancy is a major public health concern. The high intake of saturated fats, carbohydrates and sodas have been related to an increased risk of gestational diabetes mellitus. Therefore, nutritional deficiencies in pregnant women can lead to preterm labor & intra uterine growth retardation. Objective: Reproductive-aged women should adopt a healthy dietary lifestyle, which reduces the risk of adverse birth outcomes and chronic diseases of both mother and newborn.