Abbreviation: Sci. Res. Essays
Start Year: 2006
Page 1 of 135, showing 20 records out of 2688 total, starting on record 1, ending on 20
DOI: 10.5897/SRE2017.6497[Article Number: 5B02E2A64199]
The intensity of the ionizing radiations can be reduced by allowing them to pass through certain materials and such external materials are known as shields. The shielding material is often chosen based on the type and intensity of the radiation. The radionuclides of standard radioactive sources for calibration purpose or therapeutic use, the irradiated components that produce ionizing radiation of high intensity shall... Read more.
DOI: 10.5897/SRE2017.6492[Article Number: 051942D64178]
This paper presents the effect of matrix type on creep behavior at 80% loads of ultimate tensile strength of two laminated composites at different fiber and matrix system. For this, two types of laminated composites were manufactured based on two types of fibers (carbon fabric and glass fabric) with different matrix systems EPOCAST 50-A1 (EP50-A), Epoxy STR (STR) and Epoxy INJ812 (INJ). The tensile and creep behavior of... Read more.
DOI: 10.5897/SRE2016.6475[Article Number: 2C79D5F64071]
The incidence of diseases is on the surge as exemplified by the recent occurrence in West Africa of Ebola Virus (EBOV) and increase of Zika Virus in Brazil. These pathogens have evolved strategies to evade the human immune system and thus continue to be globally important human pathogens. Bioengineering capabilities are on the increase with rapid advances in synthetic biology and allied technologies (nanobiotechnology,... Read more.
DOI: 10.5897/SRE2017.6482[Article Number: E00D64863607]
Route choice is one of the main challenging problems from theoretical and practical viewpoints in the realm of pedestrian behaviour. A prime underlying concern of researchers in this field is to identify criteria or discover principles that pedestrians use to select their routes. Despite the fact that there are infinite possible routes between two given destinations in space, pedestrians in real situations tend to... Read more.
DOI: 10.5897/SRE2016.6459[Article Number: A241D8463605]
Pumping of 82 MCM/yr from Mujib basin (Eastern Dead Sea), coupled with the 54 MCM/yr recharge rate, has led to diminished groundwater levels and dramatically affects ecosystem services. Climate change compounds these issues by reducing recharge and increasing the ecosystem’s hydrological demand. This paper investigates groundwater resilience to climatic changes in Mujib basin by modeling resilience for the years... Read more.
DOI: 10.5897/SRE2016.6464[Article Number: B18B64263069]
Wadi Ishe pilot project is a trial project set to illustrate the recharge of runoff and storage in an artificial groundwater reservoir to minimize evaporation losses and as a substitute of water supply for rural arid areas that could be used for stock watering and some agricultural activities. The HEC-Hydrologic modeling System was used to estimate the runoff potential. The model in the research will provide... Read more.
DOI: 10.5897/SRE2016.6392[Article Number: E52CBC063064]
This research presents an experimental study on the Faraday instability in one-dimensional cells filled with a mixture of water and glycerol, and for a range forcing frequency between 10 and 60 Hz. It showed that for a particular forcing frequency, whose value depends on the width of the cell, an anomalous surface oscillation arises, that appears as a large wavelength mode oscillating subharmonically with respect to the... Read more.
DOI: 10.5897/SRE2016.6420[Article Number: A46460062084]
The spectral scheme for spacetime geometry is a totally new framework for quantitatively describing the spacetime geometry in terms of the spectra of a certain elliptic operator (typically the Laplacian operator) on the space in question. The central idea of the framework can be symbolically stated as ``Let us hear the shape of the Universe!" There are several advantages of this framework compared to the... Read more.
DOI: 10.5897/SRE2016.6449[Article Number: 2D2F86961859]
This experiment was carried out in order to evaluate productivity and rates of poultry manure used to amend kerosene oil contaminated soil on 0.18 ha of land. The land area was contaminated with 5% of kerosene oil equivalent to 50,000 mgkg-1 and thereafter the field laid out using randomized complete block design (RCBD) with four treatments of 10, 20, 30 tha-1 of poultry manure and control which were replicated five... Read more.
DOI: 10.5897/SRE2016.6456[Article Number: 5A94F1F61524]
TiN coatings were deposited onto mirror polished stainless steel substrates by reactive DC magnetron sputtering using a pure Ti target and Ar+N2 atmosphere. The deposited TiN coatings were thermally treated in ambient air at temperatures ranging from 500 to 700°C for times between 1 and 16 h. The as-deposited and thermally treated coatings were characterized using glow discharge optical emission spectroscopy, x-ray... Read more.
DOI: 10.5897/SRE2015. 6292[Article Number: 1E8BDF161051]
Wireless sensor network based applications have gained a significant importance in recent years. However, it creates problems when sending the detected data over distant stations even though establishment of sensor networks by means of ZigBee communication modules as the communication range of these modules are limited. For this reason, in this study, design of a gateway node which can be used in the sensor network... Read more.
DOI: 10.5897/SRE2016.6424[Article Number: D85C6CC61053]
In a context of greater climate variability and increasing population pressure, inland valleys are considered as high potential agricultural area. This agricultural potential has been subject to multiple initiatives for characterization which were generally based on the physical characteristics. However, support strategies based on such inventories often fail to fit with the promoters’ expectations. One of the... Read more.
DOI: 10.5897/SRE2016.6452[Article Number: 325998961022]
Cyprus lies in a seismic zone and the whole island (northern and southern part of the island) can be considered as an earthquake vulnerable area. In the last years, earthquake design of reinforced concrete structures becomes an important phenomenon due to unfortunate earthquakes. This amplifies the need to make such buildings earthquake resistant at a reasonably low cost. Most of the buildings are mid-rise reinforced... Read more.
DOI: 10.5897/SRE2016.6401[Article Number: 142DAB761024]
The aim of this study is to investigate the critical speed analysis and response of a rotating machinery. The search for increasingly high performances in the field of the vibration phenomena which is subject rotor are increasingly important and can lead to system instability. The use of the finite element method makes to establish dynamic equations of the movement. Numerical calculations of the model developed, can... Read more.
DOI: 10.5897/SRE2016.6441[Article Number: 0B1C97D60731]
The general form of the change-point problem is to determine the unknown location m, based on an ordered sequence of observations X1,X2,.., Xm, Xm+1,..., Xn such that, the two groups of observation X1,X2,.., Xm and Xm+1,..., Xn follow distinct models. In this paper the problem of change-point detection of two-phase Laplace model is considered. Our object is to find... Read more.
DOI: 10.5897/SRE2016.6435[Article Number: 4C4543C60480]
Tropical Africa has one of the world’s largest endowments in medicinal plant diversity. However, this potential has not been translated into pure drugs of proven efficacy and safety synonymous with modern pharmaceuticals. The basis for the slow translation of Tropical Africa’s medicinal plant wealth into value-added medicines acceptable in the doctor’s clinic is not clear. In this work, we sought to... Read more.
DOI: 10.5897/SRE2016.6421[Article Number: AB30A1B60214]
The international outsourcing of intermediate products is a common practice in manufacturing. Although outsourcing labor- and resource-intensive production to developing countries is based on financial motives, the decision should also be evaluated from an environmental perspective at a global scale. In this study, the environmental effects of four supply chain scenarios are analyzed through a life-cycle assessment... Read more.
DOI: 10.5897/SRE2015.6287[Article Number: F6CD67660204]
The female condom is a relatively new product that is intended to serve the dual role of protecting against unwanted pregnancy and sexually transmitted infections (STI). Very few studies have been conducted on the use of female condom in Nigeria. Therefore, information is lacking about its continued use, particularly among women at high risk of HIV and other STI. With the above consideration, the Society for Family... Read more.
DOI: 10.5897/SRE2016.6423[Article Number: 40FF94959675]
Diabetes mellitus (DM) has progressively increased in global prevalence. Recent studies have found that patients with DM may suffer from hearing impairment as a chronic complication. The effect of hearing loss may impair the quality of life of patients which affects functional, social, as well as psychological aspects. Both DM and hearing loss are considered to be associated, although this correlation remains elusive.... Read more.
DOI: 10.5897/SRE2016.6405[Article Number: 05EE64F59673]
This paper presents a physical model which describes the layer growth kinetics and the nitrogen concentration profiles during gaseous or plasma nitriding of pure iron. The model is related to a one dimensional moving boundary value problem where the initial concentration profiles are assumed to be linear and a new boundary condition at the diffusion zone is proposed. The model is solved by using a classical finite... Read more.
Page 1 of 135, showing 20 records out of 2688 total, starting on record 1, ending on 20