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A site earmarked for radioactive waste disposal facility was subjected to geophysical assessment and characterization. The principal aim was to ascertain the ‘competence’ or otherwise of the site and to determine whether or not the geological setting is stable enough to contain the waste. The investigation employed two geophysical techniques; electrical resistivity and seismic refraction surveys. The resistivity profiling survey have shown some zones of low resistivities at specific stations on all four survey lines which implies discontinuities in the rock formation suggesting the presence of geological contact. The seismic surveys have also revealed weak zones at same and close to the stations of the resistivity surveys. These weak zones suspected to be as a result of faults or fractures have been mapped. With the aid of the resistivity sounding data and that of the seismic refraction, the site was thus characterized as a four layer formation with geological contacts at certain points.

Green synthesis of Zinc Oxide nanoflowers by plant extract is currently under utilization. This research account on the exploit of aqueous leaf extract of Azadirachta indica in the biosynthesis of bioactive zinc oxide nanoflowers with aqueous solutions of zinc acetate and sodium hydroxide at ambient temperature. The aqueous extract of Azadirachta Indica can be used as a template to control particle size and stabilize ZnO nanoparticles. The ZnO nanoflowers prepared by the green synthesis exhibited a hexagonal wurtzite structure with a crystalline size of 51 nm and particle size of 100 nm. To make the process environmentally viable the reaction was carried out under solvent free conditions. Formation of zinc oxide nanoflowers was confirmed by Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction patterns and scanning electron microscopy (SEM) with Energy dispersive X-ray (EDX) patterns. The results confirmed that aqueous leaf extract of Azadirachta indica is a suitable green template to prepare heterogeneous ZnO nanoflowers. Green methods are be good competent for the chemical procedures, which are environment friendly and convenient.

Cotton fibre is one of the most preferred raw materials in apparel industries due to its natural feel and comfort. Fibre reactive dye is the colourant of choice for dyeing cotton fabrics due to its brilliancy, variety of hue and high wet fastness properties. The major challenge in reactive dyeing of cotton is that require large amount of salt for exhaustion, in addition to that extensive water used for removing unfixed dye. The unfixed dye along with added salt increases effluent load on effluent treatment plants and limits the opportunities for recycling treated effluents and cause environmental pollution. This research paper focuses on the modification of cotton fabrics in such a way that the produced fabrics dyed with reactive dyes without the addition of salt thus reduced the effluent load and make the process more sustainable and greener process.

The informal (Juakali) sector in Kenya lack occupational health and safety services and workers unknowingly exposed to health hazards. Worldwide, occupational noise is a significant cause of adult onset-hearing loss and 16% of disabling hearing loss in adults. . The aim of the study was to identify the health effects of noise to the Juakali artisans in King'orani area by identifying key sources of noise, assessing hearing threshold levels, examining auditory health effects of noise and the prevalence of noise induced hearing loss. This was through administration of a structured questionnaire, noise level measurements, and pure tone eudiometry to stratified, randomly selected subjects. Data was coded cleaned and analyzed using SPSS version 21.0. Out of 124 participants involved in the study, prevalence of NIHL was 59.7% with 31.5% having mild, 18.5% moderate, and 5.7% had severe, and 4% had profound impairments. The level of impairment increased with the duration and level of exposure to noise above 90 dB. Those involved in operation of pneumatic tools were the most affected compared to those involved in other activities as food vendors and hawkers. Exposure level and duration was greatly associated with auditory effects such as Tinnitus, headache, poor concentration, and sleep disorders. In conclusion NIHL, headaches, tinnitus, poor concentration and sleep disturbances are related to prolonged exposure to high level of noise above 90dB with a positive correlation coefficient of 0.248 at p<0.05. Therefore, review of OSHA 2007 to effectively regulate the informal sector, awareness campaign on effects of noise exposure, establishment of Hearing monitoring canters, special subsidies and provision of PPEs will be able to arrest the otherwise forgotten irreversible disability causing Hazard the Juakali artisans are exposed to.

The corrosion inhibition of mild steel in 1.0 M HCl solution was investigated using Hexamethylene tetramine (hexamine) as a corrosion inhibitor by using different techniques i.e. weight loss method, potentiodynamic polarization and Electrochemical Impedance Spectroscopic (EIS) at 35.0o C. Further, the surface study of corroded specimen was carried out by inverted trinocular metallurgical research microscopy. It was observed that the percentage corrosion inhibition efficiency increases with increase in the concentration of inhibitor. The maximum percentage corrosion inhibition efficiency was 93.0 % at a concentration of 800 ppm. Impedance study shows the increases in Rct value with increase in the concentration of inhibitor. Potentiodynamic polarization studies showed that Hexamine behave as mixed type of corrosion inhibitor. Results obtained from corrosion experiments shows that Hexamine is a very good corrosion inhibitor for mild steel in 1.0 M HCl.

A lot of researches on student learning styles found that each student exhibits unique characteristics, learns differently and possess a particular learning style (Zhang, 2000). However, it is not clear if students need to possess certain learning styles to be high achievers. Therefore this study aims to explore the learning style/s of a high achieving student. An interview was conducted on a student who has achieved excellent grades in the study with at least two semesters in the President’s List. The results showed that the student has not adopted any specific learning styles in her study; rather combination of styles has been utilized.

Ground water is an important resource of water. However, over exploitation has affected the groundwater quality and quantity. Assessing the ground water potential zone is very important for the protection of water and management of groundwater system. Recent trends are showing the systematic planning to stop the over exploitation of groundwater and shrinking natural resources. Geo-spatial technology is very useful to study about the groundwater in detail. In the present study delineate the possible groundwater potential zones in the Salem district using geo-spatial technology. The thematic layers considered in this present study, which are geomorphology, drainage density, lineament density. These thematic layers are integrated for identify the groundwater potential zone. Therefore, five different groundwater potential zones were identified, which are very good, good, moderate, poor and very poor. Finally, it concluded that the Geo-spatial technology is very efficient and useful for the identification of groundwater potential zones.

Intrusion detection system shave been around for quite some time, to protect systems from inside and outside threats. Researchers and scientists are concerned on how to enhance the intrusion detection performance, to be able to deal with real-time attacks and detect them fast from quick response. One way to improve performance is to use minimal number of features to define a model in a way that it can be used to accurately discriminate normal from anomalous behaviour. Many feature selection techniques are out there to reduce feature sets or extract new features out of them. In this paper, we propose an anomaly detectors generation approach using Meta heuristic algorithm in conjunction with several features selection techniques, including principle components analysis, sequential floating, and correlation-based feature selection. Meta heuristic algorithm was applied with deterministic crowding niching technique, to generate a set of detectors from a single run. In this test, based on various algorithms, we conclude that NWINE data is low in accuracy and only in the clustering algorithm, which rises precisely.

For thirty years the cultivation of cotton has become very widespread in Benin. This has led to a sprawl of agricultural land and a significant increase in the use of chemical fertilizers and pesticides and by extension, the pollution of the water resource in many parts of the country. In the north, high levels of nitrogen components are measured in the waters of the basin of Sota. Indeed the average value of 181mg / L measured for nitrate levels exceeding that permitted by the standards of quality of drinking water in the Republic of Benin. This study contributes to the knowledge of the impacts of agricultural activities on water resource in the basin of Sota in Benin.

In this paper inf – j composition (where j refers to a t- conorm) and sup- uj composition are defined. Relation between inf- j and sup- ujcompositions are established. Theorems are proved that express the basic properties of inf- j and sup- ujcomposition