Volume 6, Issue 2, February 2018 Edition - GSJ Journal Publication



THE EFFECT OF REPLACING THE JOUKOWSKI MAP WITH THE GENERALIZED KARMAN-TREFFTZ MAP IN THE METHOD OF ZEDAN []


In this research paper, the conformal mapping aspect of the method of Zedan (1990) for computation of the lift coefficient (c_l) and surface pressure coefficient distribution (c_p) on arbitrary airfoils in potential flows is generalized by replacing the inverse Joukowski transformation in the method by an inverse of the Karman-Trefftz transformation in order to asses its performance.The generalization which ensures that the airfoil contour at and around the trailing edge region is now more properly accounted for in the mapping process is applied to the NACA 4412 airfoil and its performance measured by comparing its c_l and c_p values with those of the original version of the method by Zedan (1990) using NACA experimental data as yardstick. The modified method has given reasonable predictions of these aerodynamic coefficients and has outperformed the original version of the method by Zedan (1990) .


AN ETHNOBOTANICAL SURVEY OF TREES AND SHRUBS IN MBALAGH - BURUKU LOCAL GOVERNMENT AREA OF BENUE STATE []


An Ethnobotanical survey of trees and shrubs in Mbalagh, Bukuru Local Government Area of Benue State was carried out between 2017. A total of 104 plant species were analysed and grouped based on their families with their scientific and local (Tiv) names, where the species of the family Euphorbiaceae (8) and Caesalpinoideae (8) were found to be the dominant tree species. Also, the various uses such as medicinal, food, contractions, craft and others were analysed in the study area and medicinal usage has the highest percentage with 44.8% while craft has the least with 8%. Parts used such as leaves, stem, fruits, flowers, seeds, bark and roots were also put into consideration of which leaves with 38.4% has the highest percentage usage. Descriptive statistics (Descriptive analysis) which include frequency counts and percentages were used to determine the level of usage of the identified plant species and the cultural importance index was analysed. It was concluded and established that plants, no doubts play important roles in the survival and existence of other living components of our ecosystem including man.


We have to use Bitcoin Yes or No []


Bitcoinis a form of digital currency or cyptocurrency. Digital currencies provide alternative means of payment for diverse commercial and personals transactions. They facilitate discreet payments because out of the realm of government regulations. Digital currencies are popular with libertarian people who detest governments’ participation and involvement in the regulation and supply of money (Kaplanov, 2012; Moore, 2013). Bitcoin falls under private digital currencies and has gained acceptance and popularity worldwide, with millions of transactions taking place every month. Satoshi Nakamoto, an unknown entity, launched Bitcoin in 2009. The currency facilitates electronic payments for purchases of goods and services. Presently, many merchants across the world accept payment accept payments in Bitcoin. Bitcoin emanated from advancements in the transference, confirmation, and storage across distributed networks. Distributed networks are independently controlled computers outside the realm of formal government structures, policies, and monetary systems (Glaser, Zimmermann, Haferkorn, Weber, & Siering, 2014; Nakamoto, 2008).


IOT BASED MONITORING OF GENERATOR’S FUEL & BATTERY LEVELS IN BASE STATION CELL SITES WITH SMS ALERT []


This paper presents IoT Based Monitoring of Generator’s Fuel & Battery Levels in Base Station Cell Sites with SMS Alert. In Telecommunication Network cell sites, generators are manually monitored by the site operators and the process of monitoring the fuel and the battery levels of a generator installed in every cell site is not efficient. Cases had been reported where sites shutdown for hours because of careless and unprofessional practice of the site operators, thereby imparting huge loss to the Telecommunication company. This problem has lingered and calls for serious concern. Therefore, this work introduced GSM based remote monitoring process to address the unprofessional practice used by the cell site operator to monitor various generators. The proposed system comprises of both hardware and software. The hardware part (transmitter section) consists of ultrasonic sensor, battery sensor, microcontroller, GSM module, power supply etc. while the receiver section is the mobile phone of the site operator. The software part includes the algorithm and program code written in C++ programming language. The system transmitter was carefully designed and tested. The result shows that the developed system perfectly monitored the level of the fuel and the battery health of the generators in the targeted cell site and transmits the status (parameters) via wireless to the site operator’s mobile phone. With this, cell sites can be sustained by monitoring the generators powering the Base Stations remotely and alerting the site operator accordingly.


MITIGATION OF FADING EFFECTS IN MULTIPATH CHANNELS []


In wireless communication fading of channels cause severe degradation to the strength and quality of received signal. To minimize the impacts of fading and improve the quality of the transmitted signal, several mitigation techniques are applied. In this paper, the throughput of independent channel coding and diversity is compared with the performance of their concatenation for both Rician and Rayleigh multipath fading channels. The simulation results showed that while diversity scheme performs better than coding in Rayleigh channel, coding technique outperforms diversity scheme in Rician channel. However, the combination of the two schemes performs better than either of the independent schemes in both Rayleigh and Rician channel. Hence, OSTBC offers spatial diversity gain while TCM offers coding gain, the duo make the concatenation an excellent scheme over independent diversity or coding technique in combating effects of fading.


ON p-GROUPS OF ORDER 22n+e,e {0,1} SATISFYING []


Let k(G) be the number of conjugacy classes of a group G. Then, there exists a non-negative integer t = t(G) such that: k(G) = pe + (p2 − 1)n + (p2 − 1)(p − 1)t t ≥ 0, n ∈ Z + and e ∈ {0, 1} Define: even = positive (+) and odd = negative (−). Then, the following hold (i) If n and t are of the same sign then, k(G) is negative. Otherwise, k(G) is positive. (ii) If n is 0, e and t are of the same sign, then k(G) is negative. Otherwise k(G) is positive. And the result is generally in harmony with the Sylow’s C , D and E theorems [15], [21], [22], [23].


PERCEPTION REGARDING NIPAH VIRUSINFECTION AMONG RURAL COMMUNITYIN BANGLADESH []


This cross sectional study was convinced in a rural community of Sador opogila of Kurigram district under Rangpur division among 146 adult people.Data were collected by face-to-face interview using a semi-structured questionnaire.


EFFECT OF PROBLEM-SOLVING METHOD OF TEACHING ON STUDENTS’ ACADEMIC PERFORMANCE IN PHYSICS AND CHEMISTRY IN CALABAR MUNICIPALITY, CROSS RIVER STATE, NIGERIA []


The study investigated the effect of problem solving approach on students’ academic performance in Physics and Chemistry in Calabar Education Zone, Cross River State, Nigeria. The design adopted was Quasi – experimental design. A total of 200 SS2 students constituted the sample of the study. one research instrument physics/ Chemistry Performance Test (PPT and CPT) were used to measure the variance in performance between physics and chemistry students, taught with problem-solving instructional approach. The reliability of Physics and Chemistry Performance test (PPT and CPT) were ascertained using Kudar-Richardson formular 20 which yielded a reliability of 0.85 and 0.89 respectively. Two experimental groups and two control groups were used for the research. The experimental and control respondents were taught the concepts using guided discovery approach. The two groups were pretested before treatment and posttest was administered after treatment. Data obtained were analyzed using mean scores differences. Results of findings revealed that the experimental groups taught with guided problem-solving approach had a higher mean score than the control group taught with conventional method in Physics and Chemistry. It is concluded that the use of problem-solving approach in teaching Physics and Chemistry serves as synergy in enhancing Physics and Chemistry learning in school. Based on findings, it is recommended that Physics and Chemistry teachers should adopt problem-solving approach in teaching difficult concepts.