European Journal of Scientific Research

Volume 153 No 2
June, 2019

Evaluation of the Impact of Gravity Corrections on Raw Gravity Data in South Cameroon: Prospection and Tectonic Assessments

Kue Petou Rokis Malquaire, Owona Angue Marie Louise, Njingti Nfor, Mioumnde Arthur Paterne, Eloundou Essama Lionel, Manguelle-Dicoum Eliezer and Song Weiqi
Under the effect of non-geological sources such as the altitude of the stations, the effect of the sun and the moon, the effect of the surrounding topography and the instrumental drift, the measured gravity data are subject to changes in time and in space. It is necessary to evaluate and eliminate these effects in considerable precision in order to have more reliable data that can provide the most information about the subsurface structure in the Kribi-Campo sub-sedimentary basin. This study highlights that, the free-air correction and Lunisolar correction are the most prominent in this area given its geographical position, its topographic variation and the survey configuration. Dependency of the terrain correction with isostatic compensation on one hand, and plateau correction with the established tectonic activities in the survey area were also highlighted. Despite the observed insignificance of terrain correction in local scale areas with little topographic fluctuations, its application contributes however to accuracy of the analyzed data. This analysis could be used to guide the choice of gravity corrections to be applied on raw data and decipher their relationship with gravity noise and tectonic activities.
Keywords: Gravity data, free-air correction, plateau Correction, Latitude Correction, Terrain Correction, Lunisolar Correction

Experimental Investigation of Air-Water Flow Patterns through Vertical 90-Degree Bend Upstream to Horizontal Pipe

Veyan A. Musa, Lokman A. AbdulKareem and Omar M. Ali
The air-water flow in pipes is presenting an impressive challenge due to flow complexity. The accomplishment of the perfect pipeline network, which bends is one of their accessories, thus, the designers must have the full knowledge to specify the patterns of air-water flow that produced under varied conditions within processing pipelines. An investigation is has been completed by using a vertical pipe of 6.7 cm internal diameter and it is fixed to a 90-degree bend of curvature radius 15.35 cm and joined to the outlet horizontal pipe by using two tomographic wire-mesh sensors (WMS) with water superficial velocities (Usl) ranged from 0.052 to 0.419 m/s and air superficial velocities (Usg) ranged from 0.05 to 4.7 m/s. The flow regimes are observed as bubbly, cap-bubble, slug, and churn flow at the bend inlet of the vertical flow lines, and these regimes are conformable with previous researches of this sort of flow. Moreover, the flow patterns are noticed as stratified wavy, bubbly, plug, slug, wavy-annular, and semi-annular flow at the bend outlet in the horizontal flow lines. The search reveals that the dominant flow regime is stratified wavy at the bend outlet as compared with the slug flow which identified frequently at the bend inlet.
Keywords: Air-water flow; Two-phase flow in Bends; Flow pattern in vertical pipes; Flow pattern in horizontal pipes; Wire mesh sensor (WMS)

Evaluation of Different Features of Object for Human Tracking in Thermal Imaging and Visible Imaging

Mahajan J.R and C.S.Rawat
Motion Tracking has been applied in many recent applications like surveillance, ADAS etc. Current research in this field includes making system robust and reliable in human tracking. We carried out the novel evaluation process for features of human object in the thermal imaging and visible imaging. Additionally, we also compare the performance of different features of human object. The problem addressed here is to determine the best candidate for feature to be used and imaging modality to be considered in tracking algorithm. The feature continuity (FC) and discrimination capability (DC) are new performance measures, we introduced for evaluating the different features. In this work, experimental results shows the evaluation for three features of human object, namely, average intensity, n-bin intensity histogram and edge histogram using visible and thermal imaging.
Keywords: Component, formatting, style, styling, insert (key words)

Improved K-Means Clustering Algorithm to Analyze Students Performance for Placement Training using R-Tool

T.Thilagaraj and N Sengottaiyan
The Procedure of organizing all objects in particular groups through some kind of similarity among objects is clustering. The student’s placement training is necessary for their career and also for successful placement in industry. The selection of students for the training is important and group formation among them using some strategy is a difficult task. This provides a common activity for entire students that will not lead them exactly on their path. The clustering of students is needed to overcome this problem. The K-Means clustering algorithm will choose the centroid in random approach, so the clusters will differ according to the centroid value. This will not lead to the required results which is the main drawback of the K-Means clustering algorithm. So the improved K-Means clustering algorithm is proposed to cluster the student performance with initial centroid and will choose best centroid from that to provide the required clusters.
Keywords: K-means, clustering, data mining, placement

Inventaire et Prévalence des Cestodes Parasites des Anoures dans Trois Zones agro-Industrielles au Sud-Est de la Côte d’Ivoire

Oungbe Kary Venance, Kouame Kouakou Augustin, N’zi Konan Gervais,Goore-BI Gouli and N’douba Valentin
L’inventaire des Cestodes parasites des Anoures ainsi que leur degré d’infestation ont été investigués dans trois zones agro-industrielles au Sud-Est de la Côte d’Ivoire de novembre 2016 à octobre 2017. Au total, 822 spécimens dont 207 échantillonnés dans les cocoteraies, 233 dans les palmeraies et 382 dans les bananeraies ont été examinés. Ces spécimens se répartissent en 28 taxons. La dissection des Anoures collectés a permis de mettre en évidence 2 taxons de Cestodes parasites par un examen parasitologique standard. Il s’agit de Cylindrotaenia jaegerskioeldi et Proteocephalus sp. La prévalence globale d’infestation de 3,4%, montre une très faible infestation parasitaire des Anoures par les Cestodes dans les trois zones agro-industrielles. Cette infestation est influencée par la très grande sélectivité et spécificité des Cestodes. Il en ressort que sur les 28 taxons d’Anoures examinées, seulement quatre espèces (Afixalus dorsalis, Arthroleptis sp. Hyperolius guttulatus, Ptychadena longirotris) ont été infestées par les Cestodes parasites. Le site préférentiel d’infestation des Cestodes dans l’Anoure hôte est l’intestin grêle.
Keywords: Infestation parasitaire, Cestodes, Anoures, Zone Agro-industrielle, Côte d’Ivoire

Exhalation Area and Mass Ratio of Radon Gas for Different Soil Depth of Oil Well

Idrees Majeed Kareem, Lokman A Abdulkareem and Hana Ihsan Hasan
In this study, 20 samples of mud companion oil extraction were collected during drilling, from one of the oil wells in the Kurdistan region of Iraq /Dohuk governorate / Zakho district / Tawky area. Samples are taken at different depth of well. The RAD 7 technique was used, then finding the concentrations of radon, the lowest value for radon was 14.12±8.59 Bq/m3, and the highest value was 93.25+21.72 Bq/m3. The difference is due to the different geological layers of the area. The mean rate of surface area and mass emission of radon was positively correlated with the concentration of radon .The results were compared to a number of researchers and with the values recommended by the “International Atomic Energy Agency” (IAEA). The results showed it was less than recommended by the IAEA standard.
Keywords: NORM, Oil well, Radon gas, Exhalation rate, RAD7