bluuebunny/crossref_metadata_2025 huggingface dataset:
A Comparative Analysis of Decision Tree and Bayesian Model for Network Intrusion Detection System
Authors: Ayogu Bosede A , Adetunmbi Adebayo O , Ayogu Ikechukwu I
Published: June 2020

Denial of Service Attacks (DoS) is a major threat to computer networks. This paper presents two approaches (Decision tree and Bayesian network) to the building of classifiers for DoS attack. Important attributes selection increases the classification accuracy of intrusion detection systems; as decision tree which has the advantage of generating explainable rules was used for the selection of relevant attributes in this research. A C4.5 decision tree dimensional reduction algorithm was used in reducing the 41 attributes of the KDD´99 dataset to 29. Thereafter, a rule based classification system (decision tree) was built as well as Bayesian network classification system for denial of service attack (DoS) based on the selected attributes. The classifiers were evaluated and compared using performance on the test dataset. Experimental results show that Decision Tree is robust and gives the highest percentage of successful classification than Bayesian Network which was found to be sensitive to the discritization techniques. It has been successfully tested that significant attribute selection is important in designing a real world intrusion detection system (IDS). Keywords— Intrusion Detection System, Machine Learning, Decision Tree, and Bayesian Network.
Reliability Analysis of a Solid Timber Column Subjected to Axial and Lateral Loading
Authors: Samuel Sule , Benu M J
Published: June 2020

In this paper, a reliability analysis of a solid timber column of square cross section subjected to axial and lateral loading in accordance with the design requirements of Eurocode 5 is carried out. Compression and bending were the two failure criteria considered in the reliability investigation. The First Order Reliability method was employed to solve the limit state functions formed from the two failure criteria and was coded in MATLAB for quick estimation of the reliability indices. The results obtained showed that both the load and slenderness ratios have effects on the reliability of a solid timber column. The results of the sensitivity analysis carried out on the stochastic variables showed that the reliability indices decreased with increase in slenderness ratio for 3m, 4m and 5m length of column considering both the compression and bending failure modes and decreased with increase in load ratio for 3m, 4m and 5m length of column considering both the compression and bending failure modes. The reliability indices also decreased with increase in length of column mode and decreased with increase in ratio considering bending failure mode. The reliability indices were also found to decrease with increase in load ratio for varying values of axial and lateral loads at constant slenderness ratio and length of column considering compression and bending failure modes. The choice of adequate and suitable dimensions having a lower slenderness ratio will enhance the reliability of the column. Keywords- Reliability analysis, solid timber column, Eurocode 5, failure criteria, slenderness ratio
An Overview of the Design Principles of Drinking Water Chlorination
Authors: Okeke Tochukwu C , Ndububa Olufunmilayo I
Published: June 2020

The goal of drinking water chlorination is the inactivation of pathogenic organisms in water. It offers the advantage of producing residuals useful for the preservation of water quality in a distribution system. Basic key chlorination concepts include chlorine demand/decay, chlorine residuals, and CT disinfection. The application of these concepts required a good understanding of the hydraulic condition of the system. Important consideration is the determination of initial required chlorine dose. A demonstration model using a public school water supply scheme with an overhead tank is done. This incorporates the kinematic of Contact Time (CT) disinfection, and the application of a demand model for the determination of initial chlorine concentration/dose required. Optimal application of chlorine will prevent incidences of either an over-dose or under-doze which highlight the importance of this study. Keywords— chlorine demand, CT Disinfection, initial chlorine concentration,  log removal value,  residual concentration.
Assessment of the Effects of Lime and Cement on Geotechnical Properties of Laterites
Authors: Ogundipe Olumide M , Adekanmi Jonathan S
Published: June 2020

Two different samples of soil tested as A-7-5 and A-7-6 were stabilized respectively with lime and cement. The samples were stabilized with the additives in steps of 2% and subjected to laboratory tests such as consistency limits, compaction, California bearing ratio (CBR) and unconfined compressive strength (UCS) until it reached 10% additives by weight of dry soil sample. The Proctor energy type of compaction and soaked method of CBR was adopted for the research while the compressive strength of the soils were measured in an unconfined state at days 1, 7 and 14 respectively. The plasticity index (PI) of the soil samples increase at 2% additives which later reduces with further increase as the additives contents. The soil samples attained their maximum dry densities at 6% cement and lime respectively, with cement being more effective compared to lime and the water content needed to achieve maximum dry density of the soil were higher in cement than in lime. The CBR values of the soil appreciate with increase in the additives content as indicated in the rise from 1.12% at natural to 7.26% at 6% cement content. The UCS of the lime stabilized soil improved better than that of cement stabilized soil with respect to the age of curing.  Keywords- Stabilization, Lime, Cement, Soil, Laterite.
Determination of Crop Coefficient and Water Use of SUWAN-1-SR with a Mini Lysimeter in Ibadan, Nigeria
Authors: Oke Adebayo O , Omotosho Olayinka A , Ogedengbe Kolawole
Published: June 2020

Accurate irrigation planning requires basic information about the soil, environment and the water requirements of the crop to be cultivated. With new variety of a crop comes the physiological characteristics that may be somewhat different from known varieties. Crop Water Requirement (CWR) and Crop Coefficient (Kc) are major factors required in irrigation planning and they vary with crop developmental stages. Four non-weighing Lysimeters (Diameter, 60cm and Depth, 50cm) were used to determine CWR, Kc as well as crop performances under specific conditions. The CWR and Kc of Maize variety (SUWAN-1-SR) were determined across the four developmental stages (Initial, Development, Mid and Late) using the lysimeter system.  The CWR were 58.8, 176.8, 206.0, 59.6 mm and Kc were 1.0, 1.6, 1.4, 0.7 for the respective stages.  In comparison with FAO 56 maize Kc and CWRvalues, SUWAN-1-SR requires more water across the developmental stages and a sum of 501.2mm for the crop cycle. The average yield was 14.1t/ha, while average Water Use Efficiency (WUE) in the Lysimeter plots was 2.68±0.44 kg/m3 at a planting spacing of 40cm x 40cm, The WUE is high confirming the yielding potential of SUWAN-1-SRif given necessary nutrient inputs, and water requirement met. The developed lysimeter can be used to efficiently determine CWR. Keywords -Lysimeter, Crop Coefficient, Crop Water Requirement,  SUWAN-1-SR maize variety
Time-based and latitudinal assessment of contaminated and clean water quality on concrete strength
Authors: Igibah Ehizemhen C , Agashua Lucia , Sadiq Abubakar
Published: June 2020

With increasing population and demand for infrastructural development in many developing countries, the demand for concrete has been on the increase and does not show any sign of slowing down in the nearest future. Existing concrete structures are also deteriorating and require repair or replacement. In this study, multivariate methods of factor analysis (FA) and cluster analysis (CA), were applied to analyze the liquefied samples datasets for clean and contaminated (sewage) water obtained in Ado- Odo Ota, Ogun State, Nigeria. FA clearly identified two groups of liquefied samples and indicated that the bacterial parameters are higher in fermented locust beans water which can be likened to presence of bacillus subtilis food type. Hierarchical cluster grouped 40 samples into two which are high and low levels of bacteria contents respectively. Descriptive statistics showed all parameters significantly (conductivity, TDS, BOD, COD, carbondioxide, Calcium, Chlorine, pH, Temperature, salinity) in Cluster A greater than in cluster B. The main self- healing parameter for crack sealing up, because when bacteria commence feeding on calcium lactate once activated, oxygen consumed as the bacteria feeds and insoluble limestone formed by conversion of the soluble calcium lactate is greater for contaminated water against portable water values. This study demonstrates the usefulness of multivariate statistical techniques for evaluation of presence of bacteria in liquefied samples before used as self-healing. Keywords— Carbondioxide, clean, self-healing concrete, water.
Optimal Setting of Interline Power Flow Controller for Congestion and Contingency Management
Authors: Akinropo Charles , Olarinoye Gbenga A
Published: June 2020

The effect of outages in transmission lines and generator units can be predictable for stable and reliable operation of power system through contingency assessment. Hence, contingency assessment is an important task for stable and effective operation of power system. In this paper, a method of placement of interline power flow controller (IPFC) based on the probability of severity has been proposed. Contingency ranking of lines has been done using Composite Severity Index which is a probabilistic based strategy for the placement of IPFC. IPFC is placed on the line with highest probability of severity during the occurrence of different outages. Thereafter, the size of the IPFC was optimized using cuckoo search algorithm. The proposed methodology has been applied on the IEEE 14 bus system data and results presented. The system overall CSI, active and reactive power were reduced by 7.31%, 10.17% and 14.46% respectively. The results show that optimal placement of IPFC effectively reduces line congestion, improves voltage stability and reduces the active and reactive power loss of the system.Keyword- Power Flow, line utilization factor, severity index, Contingency Management
Development of Obstacle and Pit-Detecting Ultrasonic Walking Stick for the Blind
Authors: Yahaya Suleiman A , Jilantikiri Lydia J , Oyinloye Gbenga S , Zaccheus Emmanuel J , Ajiboye Joy O , Akande Kareem A
Published: June 2020

This project focused on improving mobility for a blind person by creating an obstacle and pit detecting walking stick using ultrasonic sensors. The project comprised of both hardware and software. The hardware consists of ultrasonic sensors, buzzers and a microcontroller, while the software consists of Arduino Integrated Development Environment (Arduino IDE), which was used to program the microcontroller. A Polyvinyl Chloride (PVC) casing was used to house the hardware components. The ultrasonic sensor that detects obstacles was programmed to detect obstacles at a distance of 100 cm or below and causes the buzzer to sound so as to alert the blind person. Another ultrasonic sensor was programmed to identify pit at a depression of 18 cm and above. This stick was tested to detect obstacles by 80 different blindfolded individuals within a room with different objects placed at different positions. Results showed that the percentage reduction of collision rate when comparing the developed ultrasonic walking stick to a normal white cane is 90.1%. This shows that the ultrasonic walking stick is reliable for domestic use by a blind person. Keywords— Arduino, ATmega328 Microcontroller, Blind walking stick, Mobility aid, Smart cane, Ultrasonic sensor.
Assessment of Orange (Citrus Sinensis) Supply Chain Activities in Kano State
Authors: Lawan Ibrahim , Muhammad Aliyu I , Sale Nura A , Ahmad Rabi K , Usman Zahraddeen
Published: June 2020

The study focused on the handling system of orange in Yanlemo Market of Kano State. A field study was conducted with structural questionnaires that targeted the orange supplies, traders and agricultural equipment suppliers/fabricators. Result obtained reveals that the orange handling activity is dominated by male traders. Average of 2 to 5 bags of oranges are usually handled by about 53.3% of the respondents, while 8.3% handle more than 10 bags of the oranges daily. Dan Tivi was found to be the commonest orange variety in the study area. Some other varieties established in the study area are; Dan Nassarawa, Dan Ondo and Dan Delta representing about 8.3, 1.7 and 1.7% of the varieties handled in the study area respectively. The mode of transportation, sorting, and washing was found to be manual with a lot of challenges. The predominant manual handling of the orange established in the study area could be amongst the major reasons for the high losses usually recorded by the traders on a daily basis. Thus, useful suggestions that could be employed by researchers and policymakers to provide improvements in the supply chain activities to prevent such losses are presented.  Keywords— Orange, Assessment, Supply Chain, Handling
A Frame Work for Customer Relationship Management in Nigerian Banks Using Data Analytics
Authors: Olaniyan Olatayo M , Ojukwu Emeka , Ogude Cyril
Published: June 2020

One of the most crucial challenges that Nigeria banks have to face is in the jurisdiction of customers’ satisfaction. Customers’ satisfaction has become one of the most important factors of success in today’s banking industry in Nigeria. Today Nigeria banks customer’s increases every day, as it is essential for many Nigerian to have proper savings with any bank of their choice; if the performance of bank falls short of their expectations, the very survival of such bank would be difficult. In this paper, a   framework for customer relationship management for Nigeria banks using big data analytics approach was developed. Qualitative research was used to identify customer satisfaction through customer management system information publish annually.  The data were collected from complaint data for financial report 2017 from the Customer Relationship Management System for WEMA Bank Plc. The data were analyzed using excel spread sheet and later converted into CSV and ARFF file format respectively. Data were  exported into WEKA for data analytics which then generated results. The formulated hypotheses are subjected to empirical test using Logistic regression and Machine learning. This new strategy provided solution of these problems identified. Keywords: Data Analytics, Linear regression, Banking,  Customer Satisfaction
Estimation of the Thermal Diffusivity of Beans Using a Simple Apparatus
Authors: Akinola Akinjide A. , Adeniji Oluwatobi B
Published: June 2020

A simple apparatus for the determination of the thermal diffusivity of black-eyed beans samples, using the transient heat conduction method is presented. This apparatus is a stainless steel cylindrical tube, containing the sample, placed into a constant temperature water bath. The variation of the temperature at the center of the tube with time is recorded. The thermal diffusivities were determined from the temperature-time relationship data of the sample, and the dimensions of the equipment.  The estimated thermal diffusivity values of the samples varied between 4.70 x 10-8 to 6.94 x 10-8 and 5.26 x 10-8 to 7.68 x 10-8 when the temperature in the water bath was 50oC and 60oC, respectively.  Also, the thermal diffusivity was higher when the water bath temperature was 60oC rather than 50oC for the sample range of particle sizes studied. As black-eyed beans are a staple food in many parts of West African, they are grown, harvested, and stored. The thermal diffusivity information is useful in determining the behaviour of this Argo-product when stored. Keywords: Beans, Thermal Diffusivity, Transient Heat Conduction Method.
Development of a 3D Zinc-Entrained Activated Charcoal Anode for Air-Breathing Battery
Authors: Okuwa Charles , Aremo Bolaji , Adeoye Mosobalaje
Published: June 2020

A 3D zinc-entrained activated charcoal anode was developed to address the problem of low output current density in conventional planar-anode air-breathing batteries. The anode was a compacted and sintered mix of activated charcoal (AC), polyethylene (PE) and ammonium bicarbonate (ABC). These serve as matrix, binder and pore-former respectively. Samples were compacted at varying ratios of (AC/PE) : ABC and evaluated for suitability as anode structure using Water absorption, Hydrophobicity and Electrical conductivity tests. They were infused under vacuum with ZnSO4 solutions of 0.1, 0.2, 0.3, 0.4, and 0.5 M. It was followed by in-situ galvanostatic electroreduction of Zn2+ ion to elemental zinc to achieve zinc entrainment inside the matrix. This was carried out at varying time intervals. The anode was characterized using Optical Microscopy (OM), Scanning Electron Microscopy (SEM) and X-Ray Fluorescence (XRF). The 3D zinc-entrained anode and a planar zinc anode were evaluated and compared in air-breathing battery configuration using polarisation experiments. Optimal composition of the anode was determined to be 25% (AC/PE) and 10% ABC while optimal conditions for zinc entrainment was 0.4 M ZnSO4 and 150 mins electroreduction time. The microstructures reveal that zinc is being preferentially deposited around the rim of pores and on ridge lines. Polarisation studies showed that the 3D zinc-entrained activated charcoal anode exhibited output current density 2.5 times that of conventional planar zinc anode and a slightly higher Open Circuit Voltage of 1.44 V.. Keywords— Air-cathode, battery, electrodeposition, zinc.
Applications of Materials Science and Engineering in the Pharmaceutical Industry; a Short Review and the Current State in Nigeria
Authors: Umunakwe Reginald , Umunakwe Ifeoma J , Oyetunji Akinlabi
Published: June 2020

This paper briefly reviews the applications of materials science and engineering in the pharmaceutical industry. The materials characterization techniques highlighted in the paper as being utilized in the pharmaceutical industry are dynamic light scattering and photon correlation spectroscopy, mercury intrusion, gas density pycnometry and energy density analysis, thermogravimetric analysis and differential scanning calorimetry, x-ray diffraction, nuclear magnetic resonance and Raman microscopy. The other areas of applications of materials science and engineering in the pharmaceutical industry briefly discussed are materials processing, materials research and development, and materials selection. This paper further highlighted that the program as it is currently offered by various institutions in Nigeria is yet to incorporate the courses in pharmaceutical materials. It concluded by pointing out that some institutions outside Nigeria have incorporated pharmaceutical materials in the programs of materials science and engineering. Suggestions were made for the materials science and engineering programs in Nigeria to build further capacity for effective applications in the pharmaceutical industry. Keywords— Applications, materials engineering, pharmaceutical industry
Incorporation of CdCl2 surface treatment into the CdS/ZnTe hetero-junction solar cell device structures for efficiency improvement
Authors: Olusola Olajide I
Published: June 2020

p-ZnTe thin film semiconductors have been successfully used as an absorber material to n-CdS window layer by effectively optimising the ZnTe absorber layer thickness. In order to create a two terminal hetero-junction diode from the n- and p- type materials, two ohmic electrical contacts are required. This was achieved by depositing n-CdS layers on glass/fluorine-doped tin oxide (FTO) conducting substrate and evaporating Au on p-ZnTe layer. The ZnTe layer was successfully electroplated on CdS thin film grown on glass/fluorine-doped tin oxide (FTO) conducting substrates. The device structures were subjected to heat treatment in air with and without CdCl2 surface treatment using temperature of 400oC and duration of 10 minutes. The incorporation of the CdCl2 treatment led to enhancement in the solar cell efficiency. Solar cells developed from glass/FTO/n-CdS/p-ZnTe/Au device structure gave an open circuit voltage (Voc) of 450 mV, short circuit current density (Jsc) of 7.26 mAcm-2 and fill-factor (FF) of 0.31 resulting in 1.0% efficiency (η) for n-CdS/p-ZnTe heterostructure annealed ordinarily in air. After treating the top surface of n-CdS/p-ZnTe heterostructure with CdCl2 solution, all the solar cell parameters improved with Voc of 480 mV, Jsc of 24.0 mAcm-2 and FF of 0.46 giving a total efficiency of 5.3%. For the CdS/ZnTe heterostructures treated without and with CdCl2 solution, the rectification factors (RF) observed from the I-V characteristics under dark condition for these devices are 101.0 and 102.2 respectively. Both devices show ideality factors (n) in excess of 2.0 and the reverse saturation currents are 79.4 and 0.16 nA for hetero-junction structures without and with CdCl2 treatment respectively. The improvement in the solar cell efficiency can be accredited to the integration of the CdCl2 treatment in the p-n junction cells. Keywords: Solar Cells, p-n Junction Diodes, n-CdS, Heterostructure, p-ZnTe, CdCl2 surface treatment.
Annealing and surface treatment effect on the optical and electrical properties of n-type CdS binary compound semiconductors
Authors: Olusola Olajide I , Olusola Olufemi
Published: June 2020

The preparation of CdS thin films were actualised with electrodeposition technique using cathodic voltage of 1200 milli – Volts (mV). The optical and electrical properties of three different classes of CdS semiconductors namely as – deposited CdS layers (AD-CdS), CdS layers heat-treated in air without any chemical treatment (HT-CdS) and CdS layers treated with CdCl2 and annealed in air (CC-CdS) have been investigated in this work. Results from optical analysis showed that AD-CdS layers have the least absorption edge and highest energy bandgap. Annealing the CdS thin films without and with CdCl2 treatment brings the energy bandgap to same value of ~2.42 eV. The main distinction between the HT- and CC-CdS layers is that the absorption edge of CC-CdS films is sharper than the HT-CdS. Results from electrical analysis revealed that the magnitude of photo-electro-chemical (PEC) cell signals which give a clue about the doping concentration of the semiconductor material is greater in CC-CdS layers than in AD- and HT-CdS layers.Keywords: AD-CdS, HT-CdS, CC-CdS, Energy Bandgap, Absorption Edge, PEC Cell Signal.
A Review on the Prospect for the Development of Nanostructured and Nanocomposite Aluminium-Alloyed Austempered Ductile Iron
Authors: Adebayo Abdullahi O , Owa Adebayo F , Ajibola Olawale O , Borisade Sunday , Adigun Oluwole D , Kolawole Funsho O
Published: June 2020

This review paper has established austempered ductile iron (ADI) as a classical material that has spectra of properties achieved by altering some processing parameters through heat treatment procedures. Concerted efforts have been made to equally explore the use of additives as additional materials to this all important alloy. The use of modifiers at ultra-fine or nano-scale level as additive to the melt prior casting has also been reviewed. However, the continuous quest for innovative approaches of upgrading the structural and mechanical characteristics of ductile irons has open up interest in the development of nanostructured and nanocomposite components in bulky iron bearing materials. This paper cross-examines few available literatures on the nanostructured ADI with the aim of adopting similar methodology in the development of nanostructured aluminium-alloyed DI and nanostructured aluminium-alloyed ADI. Emphasy is laid on reviewing the production techniques and treatment parameters on the processing of the developed nanostructured aluminium-alloyed DI and/or aluminium-alloyed DI nanocomposites and with respect to their usage at low, moderate and extremely high and low temperatures. Keywords— aluminium-alloyed austempered ductile iron; development; nano-tructured; nanocomposite; processing; modifiers
Fuel Characterization of Agro-wastes and Briquettes Produced from Rice Husk, Groundnut Shell and Corncob Blends
Authors: Oni Kunle , Adeleke Ademola E , Ogundana Tunde O , Satimehin Adesola A
Published: June 2020

The choice of agro waste for the production of briquettes for domestic and industrial cottage utilization depends on the residues’ physical and fuel characteristics. This study investigate the physical and fuel characteristics for both the residues and blends of rice hull, groundnut shell and corncob. The residues were subjected to size reduction process and variance analysis was used to establish the influence of each sample blends.  Different samples of briquettes were produced by blending rice hull (R), groundnut shell (G) and corncob(C) with different ratios of R:G:C respectively using cassava starch as a binder. The residue’ dimensions and densifications of the sample briquettes were determined using standard methods.The results revealed the following ranges of values; For the compressed residues, density (0.075 - 0.099Kg/m3), volume (0.001 - 0.002m3), height (1.0357 - 1.0343m). For the relaxed residues, density (0.049 - 0.210Kg/m3), volume (0.0001 -0.0002m3), height (1.0357 - 1.0343m). The residual density of rice hull, groundnut shell and corncob are 104, 105, and 103 (Kg/m3) respectively. The densification; compressed density (461.22 - 627.24 Kg/m3), relaxed density (285.47 - 393.63 Kg/m3), density ratio (0.56 - 0.66), relaxation ratio (1.52 - 1.79), and compaction ratio (1.46 to 2.01). Blend formulations affected the combustion characteristics of the briquettes, with low moisture briquettes possessing higher calorific values. The briquette formulation containing ratio 50:20:30 of rice hull: groundnut shell: corncob respectively had more positive attributes of biomass fuel such as lower relaxation ratio and high compaction ratio than the control and other formulated briquettes in this study. Generally, significant (p<0.05) differences existed between the samples in almost all the parameters.Keywords: Briquettes, Corn comb, Densification, Fuel Characterization, Groundnut shell, Rice hull.
Development and Performance Evaluation of a Castor Seed (Ricnus Communis) Shelling Machine with a Winnowing System
Authors: Yakubu Abubakar U , Muhammad Usman S , Ishiaka Moshudi , Muhammmad Sada A , Sale Nura A
Published: June 2020

This study reports the development and performance evaluation of a castor seed shelling with a winnowing system using locally available materials. The winnowing unit does the cleaning of the castor seed after shelling with the help of fan. The machine consists of a hopper, shelling cylinder, concave, bearing, bolt and nuts, cleaning unit, pulley, grain outlet, shaft, prime mover seat and frame. The developed machine was evaluated using variety of (IAR) castor seed in a factorial experiment with five levels of cylinder speed (220, 20, 260, 280 and 300 rpm), three levels of concave clearance (15, 20, and 28 mm) and three cylinder types (metal, rubber and wood) in a completely randomized design (CRD). Data collected for shelling efficiency, cleaning efficiency, mechanical grain damage, scattered losses and output capacity were analyzed using a statistical analysis software (SAS), where analysis of variance (ANOVA) and the Duncan multiple range test (DMRT) were computed at 1 and 5% levels of significance. The results showed that the best cylinder types in descending order were metal, rubber and wood while cylinder speed of 220 rpm was optimum for all the cylinder types. However, the optimum concave clearance varies with the cylinder types as 15, 20, and 28 mm respectively. While the corresponding optimum values for output capacity, cleaning and scattered seeds were17.90 kg/h, 97.26, 78.20 and 0.51%;12.19 kg/h, 78.91 and 0.36%; 14.78 kg/h, 67.96, and 1.67%, respectively.Keywords—Keyword: Castor seed shelling machine, winnower, castor seed, and machine design.
A Model for Determining the Effect of Irregular Power Supply on Machining Foundry Products in a Developing Economy
Authors: Owa Adebayo F , Adesina Fisayo , Kolawole Funso O , Adigun Oluwole D , Kareem Biliaminu
Published: June 2020

In this paper, profit is maximized (or production cost is minimized) by developing an Integer programming (IP) model to determine, at a given respective unit cost, optimal numbers of outputs obtainable per production cycle (time) using public electricity generated from national grids and alternate electricity from generators subject to production output capacity or demand constraint. The results obtained showed that production cycle time has a great impact on the determination of optimal outputs for the respective conditions. Also, increase in cost of public electricity per unit product has an upper limit beyond which it has negative effect on the profitability. The results served as determinant factors for production industry in establishing the level of outputs that sustained the profitability by providing optimal cost of public electricity to operate without having any effect on the profit, at a given cycle time. Keywords— Constraint, cycle time, integer programming, optimal number, model
Nutritional and Sensory Characteristics of Bread Produced from Wheat and Cassava Flour, Fortified with Sorrel Seed Protein Isolate
Authors: Sanni Toibudeen A , Ogunbusola Eunice M , Jaiyeoba Cordelia N , Araoye Kudirat T
Published: June 2020

The possibility of making bread from composite flour containing 60-80% wheat flour, 10-25% cassava flour and 5-15% Sorrel seeds protein isolate was investigated. The proximate composition, mineral constituents, functional and sensory evaluation were analyzed using standard methods.  The results of the analysis showed that crude protein (8.80±0.36 to 18.70±0.35) and crude fibre (0.77±0.02 to 1.58±0.04) contents of the composite breads increased significantly with increased incorporation of cassava flour and sorrel seed protein isolate flours. The moisture (34.00±1.00 to 32.04±1.00), ash (1.22±0.03 to 0.66±0.03), carbohydrate(54.99±0.25 to 46.83±0.77) and fat (0.24±0.01 to 0.20±0.02) contents were  observed  to  decrease  significantly  with  corresponding  increase  in  the  percentage  of  the  composite  flours from 5-25% for both cassava flour and sorrel seed protein isolate flour. The results of the mineral contents showed that calcium element increased as the level of composite flour increased, while sodium, potassium and magnesium decreased as the level of inclusion increased. The functional properties, water and oil absorption, and swelling index of the composite flour showed varying degrees of variation from the control sample (100% wheat flour). The results of the sensory evaluation showed  that there were no significant  differences  (P>0.05)  in taste, texture, colour, flavour, appearance  and  overall acceptability, however, the  mean  sensory  scores  decreased  with increased  addition  of  cassava flour and  sorrel seed protein isolate  in the composite flour.  The outcome of the research showed that, nutritious bread could be produced from the composite flours of wheat, cassava and sorrel seeds protein isolate.Keywords: Bread, Wheat, cassava, Protein Isolate
The Role of State and Professional Bodies in Developing Code for Structural Concrete – Learning from other Nations
Authors: Fapohunda Christopher A , Kilani Abiodun J , Famodimu Babatunde I
Published: June 2020

In order to arrest the rampant structural failures of buildings, there have been call for the development and adoption of structural design codes that will capture all relevant environmental issues that are peculiar to Nigeria.  This paper presents the results of analysis of data collected from the public domain (libraries and internet sources) on Nations with acceptable structural design codes in concrete and allied materials. Some of the findings are that: (i) Code or Standard does not necessarily need to be a legal document or backed by the state to enjoy wider acceptance or be recognized, (ii) it is possible for people in the same professions to form professional association and regulate the operation of the profession by setting standard of practice which can be recognized, not only by people, but also acceptable to the State and (iii) whether a standard developed as a legal document or recommendations of professional association, openness and consideration for the inputs for all are necessary. This is to ensure that the operation of the standard will not run contrary to the public good, or in violation of the common law, or infringe the rights of a subject/citizen. Keywords — Building failures, Codes, Concrete, Legal document, Professional bodies, Structures.
Minimizing Interference in Ultra-Dense Femtocell Networks Using Graph-Based Frequency Reuse Technique
Authors: Adekunle Adebayo A , Gbenga-Ilori Abiodun O
Published: June 2020

This paper investigates the performance of graph colouring schemes for frequency assignment in Long-Term Evolution (LTE) networks with ultra-dense femtocells. The aim of the study is to minimize interference in such networks while ensuring efficient spectrum use for these femtocells. The three schemes investigated are the conventional greedy graph colouring algorithm, the saturation degree algorithm and our proposed graph-based theory (GBT) algorithm. The process of frequency assignment is similar in the last two except that the proposed GBT partitions the femtocells into independent sets for an efficient frequency re-use. The performance of these three schemes was analyzed through extensive simulations to determine the SINR and network capacity that can be obtained with the deployment of these schemes using the ITU-R P1238-7 path loss model. The outcome of this study showed that with the absence of a dynamic frequency assignment scheme, interference level is increased as the number of femtocell users within a particular coverage is increased, leading to a reduction in the capacity of such networks. Simulation results showed that all three algorithms considered have the ability to allocate frequencies to femtocells and minimize interference in a densely deployed environment, thereby increasing network capacity. The proposed GBT assigned the least sub-band thereby ensuring spectral efficiency while minimizing harmful interference. Results show that the greedy algorithm has a disadvantage of inefficiently assigning sub-bands randomly, while the saturation degree assigns more sub-bands when compared with the GBT scheme.Keywords — Femtocell, graph colouring, frequency assignment, LTE.
Solar Electricity System Design for Administrative Buildings
Authors: Johnson Daniel O , Hassan Kabiru A , Okusanya Sunday O , Oladapo James O
Published: June 2020

Regular availability of electricity is fundamentally important for everyday running and productivity of any organisation. In any modern society, stable and reliable electric power is a basic need, without which living condition becomes substandard and smooth business operations become difficult. Unreliability of power services in Nigeria is taking its toll on administrative, academic and research activities at Federal Polytechnic, Ede, just like other institutions in the country. Diesel generator on which the institution depends for alternative power source during outage is not sustainable as outage is too frequent and the duration is usually long, at times for days. This results in a very high running cost if normal activities in the institution are to go unimpeded. This work is on the design of 172.84kWP Solar Photovoltaic (PV) System aimed at permanently addressing the electric power challenges at the Administrative Blocks of the Federal Polytechnic, Ede. The proposed project’ design was simulated and the results show that its real life performance is highly promising. The least energy yield of the PV system occurs in June with 549.93kWh/day as against the maximum demand of 457.30kWh/day. The system performance is much higher in the months of September to March as solar irradiance is higher in these months. The PV plant has active service life of over 25years without significant change in its efficiency. The benefits of the proposed project are manifold. The project if implemented will solve the electric power problem of the institution at the Administrative’ Building by providing stable, adequate and reliable 24-hour a day electricity. The estimated cost of the proposed project is N45, 000,000  which is much cheaper than diesel generator and interestingly, is appreciably less than the cost of unreliable power supply from the grid. Keywords: Energy yield, off-grid, photovoltaic system, solar electricity, solar photovoltaic
Influence of Osmotic Pre-treatment and Drying on Physicochemical, Microbial, and Storage Stability of African Star Apple
Authors: Bolarinwa Islamiyat F , Ajetunmobi Rukayat I
Published: June 2020

African star apple (Chrysophillum albidum) is a highly nutritious fruit rich in vitamins A, B, and C.  However, African star apple (ASA) is still an underutilized fruit due to high post-harvest losses. The fruit has not been processed into a stable shelf product. The aim of this study was to determine the chemical composition and storage stability of osmotically dried ASA. Fresh matured ASA was sliced into 5 mm thickness and immersed in different concentrations of sugar solution (50, 55, and 60o Brix) for 24 h prior to drying in a cabinet dryer (55 oC, 18h). The products were stored for 8 weeks and samples were taken at 2 weeks intervals for proximate composition, microbiological, and vitamin analysis. Colour measurements and sensory attributes of the osmotically dried ASA were also determined. Proximate composition of the sample showed that there was no significant reduction in the proximate contents of the samples treated with different osmotic sugar solutions after 8 weeks of storage. However, there was a slight reduction in vitamin A (314.23 - 293.30 µg/100 g), C (11.94 – 7.38 mg/100 g), and E (8. 32 – 5.15 mg/100 g) contents of fruit after 8 weeks of storage. The microbial load of the sample decreased with increased oBrix level while colour intensity and sensory properties increased with an increase in oBrix level of the osmotic solution. This study provides basic information for postharvest management of ASA to boost its economic importance.Keywords- African Star Apple, Osmotic Dehydration, Proximate Composition, Vitamin Analysis, Sensory Properties.
Determination of Aquifer Characteristics in Okija, Anambra State, Nigeria
Authors: Ibeje Andy O
Published: June 2020

Knowledge of hydraulic properties of groundwater aids economic and environmentally friendly exploitation of water resources in water-scare rural area such as Okija. In this study therefore, the aquifer constants are evaluated for Okija town in Ihiala Local Government Area of Anambra State, Nigeria to facilitate efficient and effective exploitation of the water resources in the area. The drawdown test involved pumping down the water level and monitoring the response of hydraulic head in the surrounding aquifer. The computation of formation constants is performed in three ways: Theis method, Cooper-Jacob method and Chow method. Model Selection Criterion (MSC was used to evaluate the discharge predictions from the three methods. The results show that transmissivity and storage coefficient for Theis method are 256. 37 m2/day and 146.67 m2/day; Cooper-Jacob method are 251.71 m2/day and 131 m2/day, and chow method are 2 67.87 m2/day and 146.67 m2/day respectively. This work represents a practical and novel approach to the determination of a key hydrogeological parameter for a highly transmissive aquifer. Keywords—.Aquifer constants, Theis method, Cooper-Jacob method, Chow method, Okija
A Knowledge Representation Model Based on Select and Test Algorithm for Diagnosing Breast Cancer
Authors: Oyelade Olaide N , Dung Pam B , Owamoyo Najeem
Published: June 2020

There exist several terminal diseases whose fatality rate escalates with time of which breast cancer is a frontline disease among such. Computer aided systems have also been well researched through the use intelligent algorithms capable of detecting, diagnosing, and proffering treatment for breast cancer.  While good research breakthrough has been attained in terms of algorithmic solution towards diagnosis of breast cancer, however, not much has been done to sufficiently model knowledge frameworks for diagnostic algorithms that are knowledge-based. While Select and Test (ST) algorithm have proven relevant for implementing diagnostic systems, through support for reasoning, however the knowledge representation pattern that enables inference of missing or ambiguous data still limits the effectiveness of ST algorithm. This paper therefore proposes a knowledge representation model to systematically model knowledge to aid the performance of ST algorithm. Our proposal is specifically targeted at developing systematic knowledge representation for breast cancer. The approach uses the ontology web language (OWL) to implement the design of the knowledge model proposed.   This study aims at carefully crafting a knowledge model whose implementation seamlessly work with ST algorithm. Furthermore, this study adapted the proposed model into an implementation of ST algorithm an obtained an improved performance compared to the simple knowledge model proposed by the author of ST algorithm. Our knowledge mode resulted in an accuracy gain of 23.5% and obtained and AUC of (0.49, 1.0). This proposed model has therefore shown that combining an inference-oriented knowledge model with an inference-oriented reasoning algorithm improves the performance of computer aided diagnostic (CADx) systems. In future, we intend to enhance the proposed model to support rules. Keywords— Semantic web, ontology, OWL, breast cancer, Select and Test (ST) algorithm, knowledge representation
Ejercicio del liderazgo directivo y eficacia de la gestión educativa en instituciones públicas primarios
Authors: Trujillo-Atapoma Pio
Published: June 2020

El objetivo de la presente investigación fue determinar la relación entre el ejercicio del liderazgo de los directores con la eficacia de la gestión de las Instituciones Educativas Públicas del Nivel Primaria de Huánuco, durante el 2018. Fue un estudio con enfoque cuantitativo, de tipo correlacional, prospectivo y transversal. La muestra la conformaron 79 docentes, seleccionados por muestreo probabilístico. Se aplicaron previo consentimiento informado, una escala de eficacia de la gestión educativa y de evaluación del ejercicio de liderazgo, previamente validados y fiabilizados. Se realizó el análisis descriptivo y en el inferencial se utilizó la prueba r de Pearson. En los resultados se observó que hubo correlación significativa entre las dimensiones: trabajo en equipo y eficacia de la gestión educativa (r = 0,754); clima institucional y eficacia de la gestión educativa (r = 0,765); toma de decisiones y eficacia de la gestión educativa (r = 0,710); desempeño docente y eficacia de la gestión educativa (r = 0,641), con p ≤ 0,000. Se concluye que existe correlación significativa entre el ejercicio del liderazgo directivo y la eficacia de la gestión educativa (r = 0,773 y p = 0,000), en la UGEL Huánuco durante el 2018.
La imaginación como función interpretativa: consecuencias para la educación a través del arte
Authors: Fernández Díaz Hamlet
Published: June 2020

A lo largo de la historia de la filosofía occidental la definición del concepto de “imaginación” ha estado basado en dimensiones como lo corporal, la intuición sensible, la percepción, las imágenes mentales, la memoria, la fantasía, la espontaneidad, la combinación de ideas y la creatividad. Algunos epistemólogos contemporáneos que se remiten a la filosofía analítica de Kant han intentado recuperar la conceptualización de la imaginación en el terreno de lo cognitivo. En el presente trabajo recorremos un camino diferente. Nos remitimos al enfoque psicológico de la “imaginación creadora” desarrollado por el francés Théodule-Armand Ribot a finales del siglo XIX; y por Lev Vygotsky, quien treinta años después dio continuidad a muchas de las ideas de Ribot. Con base en los postulados de ambos psicólogos, proponemos comprender la imaginación como una función psíquica que también subyace a todo proceso de interpretación/compresión. En función de ese objetivo se explora un paralelo conceptual entre la descripción psicológica del mecanismo creativo de la imaginación y la noción semiótica propuesta por Umberto Eco de “invención de funciones sígnicas”, intentando esbozar la complejidad del fenómeno de la recepción del arte. Desde esa perspectiva interdisciplinar se exploran finalmente algunas de las consecuencias de la teoría desarrollada para una educación a través del arte.
Jogos digitais e educação linguística: precisamos falar mais desse encontro
Authors: Ferraz Daniel de Mello , Sant'Anna Pedro Moreno
Published: June 2020

Os novos letramentos (LANKSHEAR; KNOBEL, 2000, 2007), inspirados na pedagogia crítica, nas teorias críticas e nos estudos filosóficos da linguagem e sociologia, propiciaram epistemologias e ontologias essenciais para o fazer pedagógico contemporâneo, evidenciando, como afirma Snyder (2002), o fato de que educadores não podem mais focalizar apenas a leitura linear, negligenciando, assim, as mais variadas possibilidades de leituras, quais sejam, a leitura visual, multimodal, hyperlinkada e a combinação de todas elas. Nesse sentido, o objetivo deste artigo é investigar o papel dos jogos digitais como práticas pedagógicas diferenciadas. Assim, problematizamos algumas atividades com jogos digitais utilizadas para ensinar língua inglesa, cidadania e criticidade. A pesquisa foi conduzida com um grupo de jovens estudantes de uma escola estadual pública do Espírito Santo. Os dados foram coletados por meio de um questionário,de rodas de conversas gravadas em vídeo e da gravação de oito aulas em vídeo. Os resultados mostram que uma proposta pedagógica crítica com o uso de jogos pode promover pequenas transformações e mudanças na visão de mundo dos estudantes.
Genetic diversity at major histocompatibility complex and its effect on production and immune traits in indigenous chicken breeds of India
Authors: Haunshi Santosh , Devara Divya , Ramasamy Kannaki , Ullengala Rajkumar , Chatterjee Rudra Nath
Published: June 2020

Abstract. The genetic diversity at major histocompatibility complex (MHC) in indigenous chicken breeds of India
(Ghagus and Nicobari) in comparison with the White Leghorn (WLH) breed was
investigated by genotyping the MHC-linked LEI0258 marker. Altogether 38 alleles
and 96 genotypes were observed among three breeds. The observed and
effective alleles were highest in Ghagus (23, 8.3) followed by Nicobari (14,
3.2) and WLH (10 and 2.2) breeds. The size of alleles ranged from 193 to 489 bp in Ghagus, 193 to 552 bp in Nicobari and 241 to 565 bp in the WLH breed. The
number of private alleles was also highest in Ghagus (18) followed by
Nicobari (8) and WLH (5) breeds. The most frequent allele was 261 bp in WLH
(66 %), 343 bp in Nicobari (50.4 %) and 309 bp in the Ghagus (28.15 %)
breed. Observed and expected heterozygosities were highest in Ghagus (0.83,
0.88) followed by Nicobari (0.58, 0.68) and WLH (0.53, 0.54). The genetic
distance (Nei) between Ghagus and Nicobari breeds (2.24) was higher as
compared to that of Ghagus and WLH (1.23) and that between Nicobari and WLH
breeds (0.89). Association analysis revealed significant influence of MHC
alleles on body weight, egg production in Ghagus and WLH breeds and antibody
titres to Newcastle disease vaccine in the Nicobari breed.