bluuebunny/crossref_metadata_2025_split huggingface dataset:
Geophysical investigation of foundation failure at Medina Estate, Lagos, Southwestern Nigeria
Authors: Oladunjoye M.A. , Adejato K.O. , Ogunkoya A.O. 
Published: June 2020

Integrated geophysical investigation involving Ground Penetrating Radar (GPR) and Electrical Resistivity methods were carried out at Medina Estate, Lagos southwestern Nigeria to map the subsurface lithology in order to delineate its peat stratigraphy that has been causing foundation failure in the area. Twenty-one traverses (varying from 35-880 m in length) of Ground Penetrating Radar (GPR) survey were conducted along the streets of Medina trending NE-SW and NW-SE directions using the Mala 250 MHZ bi-static shielded antenna. Thirty-six Vertical Electrical Soundings (VES) were carried out using Schlumberger electrode array at some selected points along the established traverses within the area. The GPR data were processed into radar section using Rad Explorer software. The VES data were interpreted quantitatively using the partial curve matching method and 1-D forward modeling with Win Resist Software. Available litho-logs from boreholes drilled within the area were compared with the geophysical results. Results of the GPR survey delineated three geologic layers which include the topsoil with high amplitude, parallel to sub parallel, horizontal reflections, with thickness varying from 1 to 2 m across the entire profiles and composed of lateritic clay; peat layer with low amplitude, parallel sinuous/wavy reflections with depth of occurrence ranging from 2.0 to 8 m and clay with low amplitude, planar, horizontal, sub-parallel reflections underlying the peat layer. Vertical Electrical Sounding results revealed the presence of three geological layers which are the topsoil, peat and clay and sandy clay with layer resistivity values ranging from 20- 225 Ωm, 5 – 90 Ωm and 36 to 366 Ωm and thickness values ranging from 0.5 – 2 m, 4.0-29.0 m and infinity respectively. Borehole information confirms the occurrence of shallow peat with depth ranging from 1.5 to 9 m and clay layer with depth ranging from 9 to 21 m beneath the area. The GPR survey results correlates with the well logs acquired in the study area. Based on the correlation of the geophysical results with the well logs, the GPR gives better information about the peat layer compared to the Electrical ResistivityMethod. The information obtained from this study shows that the soils at shallow depth are organic soils which are difficult foundation materials because they exhibit very high compressibility, as such making shallow foundation impossible except some form of soil improvement is carried out. The alternative approach is the adoption of deep foundations in form of piles.
Keywords: Foundation Failure, Geophysical Investigation, Ground Penetrating Radar, Vertical Electrical Sounding, Peat.
The influence of media on political knowledge amongst undergraduate students in Ibadan, Nigeria
Authors: Oluwatosin Olaniru , Olusoji Olatunji s. , Olusola Ayandele , Popoola Olugbenga A. 
Published: June 2020

Knowledge about politics and government activities increases due to the socialization and enlightenment functions of the mass media. Youths and students are the largest bloc of voters in Nigeria but seemingly least political informed. This study examines the frequency of the forms of media accessed and level of political knowledge among Nigerian students. It also assessed the relationships between political knowledge and access to radio, television, newspaper, and social media. Moreover, it investigated the predictive influence of the frequency of media access on Nigerian students’ political knowledge. The study adopted Uses and Gratification Theory (UGT) to explain how media is used to the advantage of people. Using cross-sectional survey research design, a structured questionnaire was used to collect information on students’ demographic, frequency of media access and knowledge of Nigerian politics from 246 randomly selected students of the Polytechnic, Ibadan (Mean age is 25.07 years, SD = 6.23). Descriptive and inferential statistics were used to analyze the data. Findings identified social media as the most frequently use media, followed by radio, television and newspaper.31% of the respondents had very high political knowledge while 3% had no political knowledge. Access to radio is the only significant correlate (r = 0.42, p<0.05) and independent predictor (β= 0.43, t=-3.98, p<0.05) of political knowledge although access to radio, television, newspaper and social media are significant joint predictors of political knowledge (R2= .18, F (4, 241) = 4.32). Therefore, the study concludes that radio is the foremost source of political knowledge amongst undergraduate students in Ibadan, Nigeria. It recommends that various media institutions and political analysts should take advantage of the social media to make more audience politically knowledgeable.
Keywords: Political knowledge; Mass media; Social media; Traditional media; Nigerian students.
Étude du comportement alimentaire de la pintade locale (<i>Numida meleagris</i>, L.) à l’Ouest du Burkina-Faso
Authors: Traore Ibrahima , Pousga Salimata , Sankara Fernand , Coulibaly Kalifa , Nacoulma Jacques-Philippe , Kenis Marc , Mensah Guy Apollinaire , Ouédraogo Georges Anicet 
Published: June 2020

Les asticots représentent une alternative pour faire face à l’inaccessibilité des intrants sources de protéine en aviculture. L’objectif de cette étude est d’analyser le comportement alimentaire des pintades locales en présence d’asticots séchés et d’autres aliments servis en mode d’assiette anglaise ou cafeteria. Douze pintades adultes ont été individuellement réparties dans un dispositif bloc complètement randomisé à trois traitements (08 h, 12 h et 16 h) et en quatre répétitions. Deux expériences successives ont été conduites. Au cours de la première, les asticots séchés ont été associés aux grains de sorgho et de maïs concassés et servis aux pintades. Pendant la deuxième, un aliment complet a remplacé le maïs. Chaque service de durée 30 min a été suivi d’une distribution de l’aliment complet en deux temps : 01 h 30 min après et pendant la claustration (de 19 h à 07 h 30 min). La consommation journalière individuelle et la proportion de chaque aliment dans la ration ont été déterminées. Les résultats ont montré que les oiseaux préfèrent plus les grains de céréales (entre 95,56% et 98,13%) que les asticots séchés (moins de 5%) servis concurrentiellement avec les céréales. D’autres investigations sont nécessaires pour promouvoir l’utilisation des asticots dans l’aviculture.
© 2020 International Formulae Group. All rights reserved.
Mots clés: Aviculture traditionnelle, nutrition aviaire, asticots, Bobo Dioulasso
English Title: Feeding behaviour of local guinea fowl (Numida meleagris, L.) in western Burkina Faso
English Abstract
Maggots represent an alternative to deal with the inaccessibility of protein source inputs in poultry farming. The study aimed at analyzing the feeding behaviour of local guinea fowl which received dried maggots and other feeds in cafeteria feeding. Twelve adult guinea fowls were assigned individually in a completely randomized block design with three treatments (08 am, 12 am and 04 pm) and four replications per treatment. Two consecutive experiments were carried out. In the first experiment, dried maggots were choice-fed with sorghum and cracked maize grain and served to guinea fowl. In the second experiment, a complete layer diet replaced the cracked maize. In all treatments, the cafeteria test lasted 30 minutes, followed by a two-step distribution of the complete diet: 01 h 30 min after and during the confinement at night (from 07 pm to 07:30 am). The daily individual consumption and the proportion of each food in the ration were determined. The results showed that birds prefer cereal grains (between 95.56% and 98.13%) more than dried maggots (less than 5%) served concurrently with cereals. Further investigations are needed to promote the use of maggots in poultry farming.
© 2020 International Formulae Group. All rights reserved.
Keywords: Traditional poultry farming, avian nutrition, maggots, Bobo-Dioulasso
Effet de la terre des termitières sur la croissance de trois cultivars de la morelle noire (<i>Solanum nigrum</i> L. : Solanaceae) cultivée à Brazzaville (Congo)
Authors: Kpangba Thierry Placide Médard Kingo , Mpika Joseph , Makoundou Alaric , Bita Mercier Alain , Attibayéba Attibayéba 
Published: June 2020

La productivité de la morelle noire est faible sur les sols surexploités dans les zones périurbaines de Brazzaville. L’objectif était d’évaluer l’apport de la terre des termitières sur la croissance végétale de trois cultivars de la morelle noire. Les termitières collectées ont été broyées, tamisées et amendées les planches de 3 m x 1,2 m. Une planche ayant reçu 0 kg, 2 kg, 4 kg et 6 kg de terre des termitières, 60 plants d’un cultivar ont été repiqués aux écartements 20 x 20 cm selon un schéma bi factoriel complet 4 x 3 logé dans un dispositif en bloc complètement randomisé. Les traitements ont été répétés trois fois. Les résultats ont révélé une meilleure croissance en hauteur et en diamètre ainsi qu’un meilleur développement foliaire des plants amendés avec les doses de la terre des termitières en comparaison de ceux n’en ayant pas reçu. L’apport de 6 kg de terre des termitières montre une influence positive sur le développement racinaire de plants des trois cultivars. L’apport 2 kg, 4 kg et 6 kg de terre de termitières améliore la croissance végétative et le rendement en biomasses aérienne et souterraine de trois cultivars de morelle noire cultivés au Congo.
© 2020 International Formulae Group. All rights reserved.
Mots clés: Congo, fertilisation, termitières champignons, croissance végétative, Solanum nigrum L.
English Title: Effect of the termite mounds on the vegetative production of three cultivars of black nightshade (Solanum nigrum L.: Solanaceae) grown in Brazzaville, Congo
English Abstract
The productivity of black nightshade is low on the overexploited soils in the suburban areas of Brazzaville. The objective was to evaluate the contribution of termite mound on the plant growth of three black nightshade cultivars. The termite mounds were collected, crushed, sieved and amended the planks of 3m x 1.2m. A board having received 0 kg, 2 kg, 4 kg and 6 kg of termite mounds, 60 plants of a cultivar were transplanted at 20 x 20 cm intervals according to a complete 4 x 3 bi-factorial diagram housed in a block plan completely randomized. The treatments were repeated three times. The results showed better growth in height and diameter, as well as better foliar development of seedlings amended with termite mounds compared to those that did not. The contribution of 6 kg of termite mound had a positive influence on the root development of the three cultivars. The contribution of 2 kg, 4 kg and 6 kg of termite mound improved vegetative growth and yield in aboveground and belowground biomass of three black nightshade cultivars grown in Congo.
© 2020 International Formulae Group. All rights reserved.
Keywords: Congo, cultivar, fertility, Termite fungi, vegetative production, Solanum nigrum L.
Biopesticide Plants species of the mining area of Tokpli (South-Togo) effects on Okra (<i>Abelmoschus esculentus</i>) protection against <i>Aphtona spp.</i>
Authors: Toundou Outéndé , Palanga Koffi Kibalou , Simalou Oudjaniyobi , Abalo Mabafei , Woglo Iréné , Tozo Koffi 
Published: June 2020

Pest management is among the many challenges confronting African farmers today. In Togo, pest attack has been seen as a challenge posed on many vegetable crops producers. In pursuit to contribute to effective vegetables crops protection using local Biopesticide plants, an ethnobotanical survey conducted in the District of Tokpli to collect data from the local population identified five biopesticide plants. Among these plants, Chromolaena odorata, Morinda lucida, Azadirachta indica, and Ludwigia decurrens pure leaves extract significantly reduced the number of Aphtona spp. attacking Okra (Abelmoschus esculentus) plants in the field. Treatment Efficiency of the pure aqueous extract from mixture of leaves of these four plants, applied at the interval of 1 day and 2 days of 14 days were respectively 90% and 81% and were significantly higher than the result obtained with the chemical insecticide LAMBDA POWER applied following the recommendations of the manufacturer which was 79%.
© 2020 International Formulae Group. All rights reserved.
Keywords: Biopesticide, crops protection, Chromolaena odorata, Morinda lucida, Azadirachta indica, Ludwigia decurrens
Development and validation of a UV-Visible method for the determination of the active principle Efavirenz in tablets
Authors: Tittikpina Nassifatou Koko , Wane Thierno Mouhamed , Diouf Diery , Thiam Khadidiatou , Diop Amadou , Fall Djibril , Diop Yerim Mbagnick , Sarr Serigne Omar 
Published: June 2020

Methods proposed by pharmacopeias to control the quality of Efavirenz, an antiretroviral drug used in the treatment of AIDS are based on expensive equipment which are most of the time not available in African countries. To solve this issue, using UV-visible spectrophotometry, a cheap and easy-to-use device available in many laboratories on the African continent; a sensitive, reliable, simple and rapid method has been validated for the determination of the active substance Evafirenz in Efavirenz tablets, to control their quality by checking its dosage. The accuracy profile approach was adopted. The response function gave a correlation coefficient R2 = 0.9987. The detection and quantification limits were 0.15625 μg / mL and 0.515625 μg / mL, respectively. The acceptability limit has been set at 15%. The tolerance limits for the different concentration levels (80, 100 and 120%) are represented respectively as follows: lower limits 86.2; 90.3 and 96.1%; upper limits 100.2; 106.3 and 113.7%. The tolerance limits are within the acceptability limits for values around 100% concentration (7 μg / mL). Therefore, the method was declared valid and reliable for the analysis of Efavirenz in Efavirenz tablets and could routinely be used in laboratories for the quality control of EFAVIRENZ drug.
© 2020 International Formulae Group. All rights reserved.
Keywords: Efavirenz, accuracy profile, spectrophotometry, pharmaceutical formulation
Etude de l’effet de <i>Cercospora oryzae</i> Miyake sur la qualite des grains du riz et le developpement de la ternissure
Authors: Soura Hervé B. , Gnancadja-Andre Simplice L. , Zandjanakou-Tachin Martine , Gandonou Christophe , Baba-Moussa Farid A.K. 
Published: June 2020

La cercosporiose due à Cercospora oryzae est un champignon pouvant causer des pertes allant jusqu'à 60%. Elle est de plus en plus fréquente en Afrique de l'Ouest. Les premières prospections réalisées au sud du Bénin ont indiqué que Cercospora oryzae a une contribution large puisqu’elle a affectée 85% des champs de riz des trois zones agroécologiques du sud Bénin. Cette étude vise principalement à contribuer à la connaissance détaillée des effets de Cercospora oryzae sur les grains afin d’optimiser la conservation, la commercialisation et la production. Elle a consistée a : i) évaluer les effets de Cercospora oryzae sur le pouvoir germinatif des grains, ii) évaluer les effets de Cercospora oryzae sur le développement de la ternissure. L’étude a combiné des outils physiologiques et phytiatriques. Au terme des travaux, les variétés testées ont enregistré une bonne teneur en eau pour un minimum de 6%, ainsi qu’un bon taux de germination. A la fin de l’étude nous avons pu constater que Cerocpora oryzae entrainait une baisse du pouvoir germinatif des grains, une altération de la graine blanche et une décoloration de l’enveloppe. Ces résultats constituent une étape d’un travail de recherche approfondi sur la caractérisation (agronomique et génétique) de Cercospora oryzae afin de proposer des méthodes de luttes.
Mots clés : Pouvoir germinatif, décoloration, altération, Cercospora oryzae, riz.

English Title: Study of the effect of Cercospora oryzae Miyake on the quality of rice grains and the development of tarnishSigatoka caused by Cercospora oryzae is a fungus that can cause losses up to 60%. It is more and more frequent in West Africa. The first surveys carried out in the south of Benin indicated that Cercospora oryzae has a large contribution since affected 85% of the rice fields of the three agroecological zones of southern Benin. The main objective of this study is to contribute to detailed knowledge of the effects of Cercospora oryzae on grains in order to optimize conservation, marketing and production. It consisted in: i) evaluating the effects of Cercospora oryzae on the germination power of the grains, ii) evaluating the effects of Cercospora oryzae on the development of tarnish. The study combined physiological and phytiatric tools. At the end of the work, the varieties tested recorded a good water content for a minimum of 6%, as well as a good germination rate. At the end of the study we could see that Cerocpora oryzae did not cause a drop in the germinative power of the grains but rather resulted in an alteration of the white seed and a discoloration of the envelope. These results constitute a stage of an in-depth research work on the characterization (agronomic and genetic) of Cercospora oryzae in order to propose methods of struggle.Keywords: Germination, discoloration, deterioration, Cercospora oryzae, rice.
Variation of essential oil composition of fruits of <i>Zanthoxylum leprieurii</i> Guill. et Perr (Rutaceae) from different sample locations and during their maturation period
Authors: Tine Yoro , Diallo Alioune , Diatta William , Ndoye Idrissa , Guèye Rokhya Sylla , Baldé Mamadou , Diédhiou Adama , Fall Djibril , Seck Matar , Desjobert Jean-Marie , Costa Jean , Wélé Alassane , Paolini Julien 
Published: June 2020

The fruits of Zanthoxylum leprieurii Guill. & Perr. (Rutaceae) are traditionally used in Africa, particularly in Cameroon, as a spice and in the treatment of sickle cell anaemia. The objective of this study was to investigate the fruit essential oils from different sample locations and during their maturation period by using GC and GC-MS. Except for one sample collected in Aniak which consisted mainly of oxygenated monoterpenes, the volatile composition of Z. leprieurii fruits exhibited relative high amounts of monoterpene hydrocarbons (61.1-90.9%) such as (E)-β-ocimene (13.4-75.2%) and a-pinene (1.1-40.7%). The influence of the maturity stage on the chemical composition of the essential oils has resulted in an increase of oil yield and variations in the content of volatile compounds (a-pinene 13.3-75.6; (E)-β-ocimene 2.9-64.0%).
Keywords: Senegal, Zanthoxylum leprieurii fruits, essential oil, chemical variability, stage of maturity and GC-MS.
Automated university lecture timetable using Heuristic Approach
Authors: Hambali A.M. , Olasupo Y.A. , Dalhatu M. 
Published: June 2020

There are different approaches used in automating course timetabling problem in tertiary institution. This paper present a combination of genetic algorithm (GA) and simulated annealing (SA) to have a heuristic approach (HA) for solving course timetabling problem in Federal University Wukari (FUW). The heuristic approach was implemented considering the soft and hard constraints and the survival for the fittest. The period and space complexity was observed. This helps in matching the number of rooms with the number of courses.
Keywords: Heuristic approach (HA), Genetic algorithm (GA), Course Timetabling, Space Complexity.
Design and analysis of displacement models for modular horizontal wind turbine blade structure
Authors: Etuk E.M. , Ikpe A.E. , Adoh U.A. 
Published: June 2020

This study examined the normal, radial, axial and tangential loading cycles undergone by wind turbine rotor blades and their effects on the displacement of the blade structure. The rotor blade was modelled using Q Blade finite element sub module, which evaluated the loading cycles in terms of the forces induced on the blade at various frequencies through several complete revolution cycles (360o each cycle). At frequencies of 5 HZ, 23 Hz, 60 Hz, 124 Hz and 200 Hz, maximum strain deformation of 0.004, 0.04, 0.08, 0.14 and 0.24 were obtained, and geometry of the deformed blades were characterized by twisting and bending configuration. Maximum deflections from tangential loading increased from -0.55-1.2 mm, -0.39-1.6 mm from axial loading, -0.28-1.8 mmfrom radial loading and -0.01-2.3 mm from normal loading. From these deflection values, normal loading cycle would cause the highest level of structural damage on the rotor blade followed by radial, axial and tangential loading. Moreover, the strain deformations and deflections of the blade structure increased as the cycles of frequency increased.
Keywords: Loading cycle, Wind turbine, Rotor blade, Frequency, Strain deformations, Deflections.
Pressure behaviour of a horizontal well sandwiched between two parallel sealing faults
Authors: Ogbamikhumi A.V. , Adewole E.S. 
Published: June 2020

Generally, reservoir fluid flow is governed by diffusivity equation and solution to this equation helps to investigate pressure behaviour under certain reservoir and wellbore boundary conditions. In this paper however, the analytical solution method of Green and Source function is deployed to determine the performance of a horizontal well located between two parallel sealing faults, assuming simple rectangular reservoir geometry. Also, the dimensionless pressure and derivative approach is applied for all computations as it prevents the problem of unit conversions, reduces longer expressions and it helps to handle numerical values. The pressure expression derived from this work reveals that a maximum of two flow periods occur for the stated reservoir model. It was found out that an inverse relationship exists between dimensionless pressure and dimensionless length while pressure increased with thickness. Also high vertical permeability shortens the effect of the early radial flow period experienced by the horizontal well, thereby increasing productivity index. Finally, it was discovered that increased perforation length reduces the production potential of the horizontal well.
Keywords: Dimensionless pressure, pressure derivatives, heterogeneity, pressure performance, reservoir and wellbore characterization.
Modeling and simulation of the effect of moisture content and ambient temperature on gas turbine power plant performance in Ughelli, Nigeria
Authors: Onoroh F. , Ogbonnaya M. , Onochie U.P. 
Published: June 2020

The influence of ambient temperature and moisture content on the performance of Transcorp Power Plant, Ughelli, Delta State, Nigeria was investigated with the aid of a digital psychrometer. The simulation was done using codes developed on MATLAB R2017a and the results show that compressor power consumption increased by 1.65% for 0.7% rise in temperature, and 0.50% for 71.4% rise in moisture content. The specific fuel consumption also increased with increase in temperature where a 1.71% rise in ambient temperature resulted in a 0.15% rise in specific fuel consumption but it decreased by 0.49% for a 41.7% rise in moisture content. A 1.62% rise in temperature led to a 0.13% drop in net power output and a 29.4% rise in moisture content resulted in a 0.48% drop in net power output. Thus gas turbine plant operates optimally in areas with low ambient temperatures and high moisture content.
Keywords: Work ratio, net power, efficiency, moisture content, specific fuel consumption, heat rate.