bluuebunny/crossref_metadata_2025_split huggingface dataset:
COMPARATIVE STUDY OF BS 8110 AND EUROCODE 2 IN STRUCTURAL DESIGN AND ANALYSIS
Authors: Nwoji CU , Ugwu AI 
Published: June 2021

This work was undertaken to compare the use of BS 8110 and Eurocode 2 in the design of structures and focused on outlining the relative gains and/or shortcomings of Eurocode 2 and BS 8110 under certain criteria which are loading, analysis, ease of use and technological advancement. To accomplish this, the analysis and design of the main structural elements in reinforced concrete building was undertaken using the two codes. A modest medium rise building was loaded using the two code and analyzed. Analysis was done using CSI start tedds to obtain the shear force and bending moment envelopes. For the beam, it was found that Eurocode 2 gave higher internal supports moments. For the case of maximum span moments and shear force values, the Euroode 2 values lagged behind. Column load and moments values were generally lower for Euroode 2. In summary, the comparative benefits of using Euroode 2 are that it is logical and organized, less restrictive and more extensive than the BS 8110. The new Eurocodes are claimed to be the most technically advanced code in the world and therefore should be adopted by Nigerian engineers.Â http://dx.doi.org/10.4314/njt.v36i3.14
BESSEL FUNCTIONS FOR AXISYMMETRIC ELASTICITY PROBLEMS OF THE ELASTIC HALF SPACE SOIL: A POTENTIAL FUNCTION METHOD
Authors: Ike CC , Onah HN , Nwoji CU 
Published: June 2021

Elasticity problems are formulated using displacement methods or stress methods. In this paper a displacement formulation of axisymmetric elasticity problem is presented. The formulation uses the Boussinesqâ€“ Papkovich â€“ Neuber potential function. The problem is then solved by assuming Boussinesq â€“ Papkovich - Neuber potential functions in the form of Bessel functions of order zero and of the first kind. The potential functions are then made to satisfy the governing field equations and the associated boundary conditions for the particular problem of a point load at the origin of the semi-infinite linear elastic isotropic soil mass. The unknown parameters of the function are thus determined and used to find the stresses, strains and displacement fields in the loaded soil. The results obtained were identical with the results obtained by Boussinesq.Â http://dx.doi.org/10.4314/njt.v36i3.16
GLASS-FIBRE REINFORCED COMPOSITES: THE EFFECT OF FIBRE LOADING AND ORIENTATION ON TENSILE AND IMPACT STRENGTH
Authors: Adekomaya O , Adama K 
Published: June 2021

The primary objective of this research work is to analyse the effect of fibre loading and orientation on the tensile and impact strength of the polymeric composite materials. Fibre reinforced composite materials have been reported to have attracted many applications in view of its low weight and superior strength when compared with the metal matrix composite. While researches have established the weight reduction of fibre reinforced polymer material, few works have reported the impact of orientation on the manufacturing of polymer composite. In this study, series of experimental works were done to demonstrate the manufacturing of glass-fibre reinforced epoxy resin with special attention on the influence of oriented reinforced composite material. The composites were manufactured using hand-lay technique with three different fibre loadings (10, 20, and 30 wt. %) and at two different fibre orientations (30o and 60o). Key of the finding drawn from this research form the basis of discussion and, composite with 60o fibre orientation showed better tensile strength when compared with the neat resin and other oriented (G10E30) fibre reinforced composite. Similar observations were also noticed on the impact strength of these composites which signify the improved mechanical properties of oriented reinforced composite materials.Â http://dx.doi.org/10.4314/njt.v36i3.17
STRENGTH CHARACTERIZATION OF FOUNDATION SOILS AT FEDERAL UNIVERSITY LOKOJA BASED ON STANDARD PENETRATION TESTS DATA
Authors: Sadeeq JA , Salahudeen AB 
Published: June 2021

Strength characteristics of foundation soils in the Permanent site of the Federal University Lokoja in Kogi State were evaluated based on standard penetration test (SPT) results using some conventional analytical models proposed by different researchers. The study was carried out in order to take precise engineering decisions on the type of foundations suitable for the proposed structures and to determine the optimal depth of foundation embedment.Â The SPT N-values were first corrected to the standard average energy of 60% (N60) before they were used to correlate soil properties. Evaluation of the soil properties were done at foundation embedment depths of 0.6, 2.1 and 3.6 m. Results show that bearing capacity generally increased with boring depth. Based on the Meyerhof allowable bearing pressure estimation method, foundation pressures in the range of 150 â€“ 600Â kN/m2 were evaluated for use in the study area at shallow depths (depths in the range of 0.6 - 3.6 m).http://dx.doi.org/10.4314/njt.v36i3.2
PRESSURE ANALYSIS AND FLUID CONTACT PREDICTION FOR ALPHA RESERVOIR (A PARTIALLY APPRAISED FIELD) ONSHORE NIGER DELTA.
Authors: Ogbamikhumi A , Akanzua-Adamczyk AH , Ahiwe L 
Published: June 2021

The study field is green, with limited well penetrations. The objective reservoir (Alpha Reservoir) is a relatively shallow one, with 6 wells penetration. Two of the wells are wet (Water-Up-To) while the rest penetrated hydrocarbon bearing intervals (Gas-Down-To). As pressure data was not acquired in the water leg of the reservoir, pressure gradient analysis was done with the field-wide hydrostatic profile for contact and fluid prediction. Also, an evaluation of the possibility of having an oil rim within the region of fluid-type uncertainty was carried out. The predicted results revealed that the objective reservoir has the potential of having oil rim of a possible gradient 0.20psi/ft., with a column height of less than or equal to 20ft. Such an oil column if present is deemed insignificant. Therefore, the reservoir can be developed as a non- associated gas reservoir with a predicted Gas-Water-Contact of 7529ftss.Â http://dx.doi.org/10.4314/njt.v36i3.20
ALUMINA PHASE TRANSFORMATION FROM THERMAL DECOMPOSITION OF AMMONIUM ALUM SYNTHESIZED FROM KANKARA KAOLIN
Authors: Bawa SG , Ahmed AS , Okonkwo PC 
Published: June 2021

Thermal stability of transitional alumina phases produced from ammonium alum using Kankara kaolin as starting material was studied. Wet beneficiation method was employed to purify the starting material, after which it was calcined and dealuminated with sulphuric acid. The elemental composition, mineralogical, and physiological analyses were carried out using X-ray fluorescence (XRF), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) techniques respectively. The ammonium alum was thermally treated by varying the calcination temperature from 700 to 1200Â°C and varying the time of calcination from 1 to 4 h. The formation of gamma alumina began at calcination temperature of 825Â°C for calcination time of 3 h, which was found to be lower than reported works of 900Â°C. It was found to be stable at higher temperature of 1125Â°C, above which phase transformation to alpha alumina was observed. The observed wide range of thermal stability of the gamma alumina phase gives it good advantage to be used for high temperature applications, such as support for catalyst promoters. Alpha alumina phase formation began at 1150Â°C and was fully formed at 1200Â°C. BET specific surface area of 166 m2/g was obtained for the gamma alumina phase which was high enough for it application as support for catalyst, catalyst and adsorbent.Â http://dx.doi.org/10.4314/njt.v36i3.23
SPEED CONTROL OF DC MOTOR ON LOAD USING FUZZY LOGIC CONTROLLER (A CASE STUDY OF EMERGENCY LUBE OIL PUMP MOTOR OF H25 HITACHI TURBINE GENERATOR)
Authors: Ekpoudom II , Archibong IE , Itaketo UT 
Published: June 2021

This paper presents the development of a fuzzy logic controller for the driver DC motor in the lube oil system of the H25 Hitachi gas turbine generator. The turbine generator is required to run at an operating pressure of 1.5bar with the low and the high pressure trip points being 0.78 bar and 1.9 bar respectively. However, the driver DC motor speed drifted from the desired speed of 1450 revolutions per minutes (rpm) to as low as 1414 rpm. It is against this backdrop, that this project work was envisaged to design a controller capable of controlling the speed of the DC motor in order to achieve the desired speed rating of 1450 rpm. In modelling the motor, the transfer function method was used to develop a linear approximation to the actual motor. After computing the total inertia of the motor shaft, the motor model was simulated for the speed response in MATLAB and Simulink environment, and the response showed that the motor attained an actual maximum speed of 1414 rpm at settling time of 0.3 seconds.Â Based on expert knowledge of the lube oil system, a fuzzy logic controller was designed and this resulted in the issuance of a control action to correct the actual speed of the motor from 1414 rpm to the desired speed of 1450 rpm. Â http://dx.doi.org/10.4314/njt.v36i3.29
COMPARATIVE ANALYSIS AND IMPLEMENTATION OF DIJKSTRA'S SHORTEST PATH ALGORITHM FOR EMERGENCY RESPONSE AND LOGISTIC PLANNING
Authors: Eneh AH , Arinze UC 
Published: June 2021

TransRoute: a web-based vehicle route planning application is proposed in this paper. This application leverages existing input-output (I/O) efficient implementations of shortest path algorithms (SPAs) to implement the proposed system that will fundamentally address the problems experienced in moving people, goods and services from one location to another. A number of SPAs are evaluated using landau notations. Main functionalities of the system will be implemented as a web-enabled geographic information system (GIS) application based on open-source technologies and object-oriented software development methodology using unified modeling language. Pilot implementation is done based on spatial data of three selected states in Nigeria, pulled from web-based mapping tools like Google Maps and Microsoft Bings respectively. In conclusion, the Dijkstra's algorithm implemented with double bucket dynamic data structure is selected for implementing the proposed route planning system, as past research efforts has proven that it is the fastest with run-time improvements from O(m + n/log C) to O(m) respectively.Â http://dx.doi.org/10.4314/njt.v36i3.30
DETERMINATION OF WEIBULL PARAMETERS AND ANALYSIS OF WIND POWER POTENTIAL IN COASTAL AND NON-COASTAL SITES IN AKWA IBOM STATE
Authors: Udoakah YN , Ikafia US 
Published: June 2021

The wind power potential and its viability for commercial energy production across two sites Eket (Latitude 4033â€™N & Longitude 7058â€™E) and Uyo (Latitude 5Â°18â€™53.7â€™â€™N & Longitude 7059â€™39.29â€™â€™E) in Akwa Ibom State were investigated. Using data obtained from the Nigeria Meteorological Agency (MIMET) for both locations for a period of four years (2010-2013), a statistical analysis was performed. The Weibull Distribution Function was used to determine the monthly and yearly wind speed. Resulting from the analysis, the values of the average wind speed, the average daily wind power, the shape parameter (k) and the scale factor(c) were obtained to be 6.7 m/s and 4.3 m/s, 0.91 MW and 0.25 MW, K~ 5.4 and 2.1, and c â‰ˆ 8.8 m/s and 4.6 m/s respectively, for Eket and Uyo. Also, the annual electricity generation was projected to be 40.88 MWh& 10.80 MWh respectively, for Eket and Uyo. The Weibull distribution can be relied on for accurate prediction of wind energy output and resulting from the predicted values, Eket a coastal area was assessed to be viable for commercial wind power production compared to Uyo a non-coastal area.Â http://dx.doi.org/10.4314/njt.v36i3.36
HIGH AND LOW WATER PREDICTION AT LAGOS HARBOUR, NIGERIA
Authors: Badejo OT , Akintoye SO 
Published: June 2021

In this work, 500 hourly water level tidal data were used to perform least squares tidal harmonic analysis. Eleven tidal constituents were used for the harmonic analysis. Astronomical arguments (v + u) and the nodal factor (f) were computed for each tidal constituent and at each observational period with a programme written in Matlab environment. The harmonic constants determined from the least squares tidal harmonic analysis were substituted into a tidal prediction model to predict hourly tidal data and tidal predictions at 5 minutesâ€™ intervals. Series of high and low water heights from the tidal predictions made at 5 minutesâ€™ intervals were determined and matched with their corresponding times. Autocorrelation at lags 1 to 30 for the residuals of the observed and predicted tidal data shows that there is no significant correlation in the range of the 30 lags. The series of residuals of the observed and predicted tidal data is therefore white noise. Â Â http://dx.doi.org/10.4314/njt.v36i3.39
SUITABILITY OF BURNT AND CRUSHED COW BONES AS PARTIAL REPLACEMENT FOR FINE AGGREGATE IN CONCRETE
Authors: Ogarekpe NM , Agunwamba JC , Idagu FO , Bejor ES , Eteng OE , Ndem HO , Oloko EO 
Published: June 2021

The suitability of burnt and crushed cow bones (BCCB) as partial replacement for fine aggregate in concrete was studied. The percentages of replacements of fine aggregates of 0, 10, 20, 30, 40 and 50%, respectively of BCCB were tested considering 1: 2: 4 and 1: 11/2 :3 concrete mix ratios. The cow bones were burnt for 50 minutes up to 92oC before being crushed. Ninety-six (96) concrete cubes of 1: 2: 4 mix ratio and ninety-six (96) concrete cubes of 1 :Â : 3 mix ratio measuring 150x150x150mm were tested for the compressive strength at 7, 14, 21 and 28 days respectively. The research revealed that the BCCB acted as a retarder in the concrete. Water-cement ratio increased with the increase in the percentage of the BCCB. The mixes of 1:2:4 and 1::3 at 28 days curing yielded average compressive strengths in N/mm2 ranging from 16.49 - 24.29 and 18.71 - 29.73, respectively. For the mix ratios of 1:2:4 and 1:: 3 at 28 days curing age, Â it was observed that increase in the BCCB content beyond 40 and 50%, respectively resulted to the reduction of the average compressive strength below recommended minimum strength for use of concrete in structural works.http://dx.doi.org/10.4314/njt.v36i3.4
DEVELOPMENT OF U-CHANNEL SCREW JACK FOR VEGETABLE OIL EXTRACTION
Authors: Odewole MM , Sunmonu MO , Oyeniyi SK , Adesoye OA , Ikubanni PP 
Published: June 2021

A U-channel screw jack for extracting vegetable oil was developed through design (with Solid worksâ€“Computer Aided Design (CAD)) and fabrication processes. A factorial experiment in a Randomized Complete Block Design (RCBD) was used to investigate the effect of heating temperature (50, 60 and 70Â°C) and heating time (5 and 10 min) on the performance of the machine in terms of oil yield, extraction efficiency and extraction loss with groundnut as the feedstock. Results of the machine design for some of the machine components gave the following values: U-channel structural frame made of mild steel (80 x 160 x 650 mm), compression cap (70 mm) and heater band(3.5kW). Also, the performance evaluation of the machine showed that increase in heating temperature (50 to 70Â°C) and heating time (5 to 10 min) did not cause the oil yield, extraction efficiency and extraction loss to increase beyond 30%, 48% and 15% respectively. Generally, decrease in oil yield, extraction efficiency and extraction loss occurred at the heating temperature of 70 oC irrespective of the heating time. For future works, other machine and feedstock factors should be incorporated into the performance evaluation process. Also, automation of the machine is recommended.Â Â Â http://dx.doi.org/10.4314/njt.v36i3.43
EXPERIMENTAL AND ANALYTICAL COMPARISON OF TORSION, BENDING MOMENT AND SHEAR FORCES IN REINFORCED CONCRETE BEAMS USING BS 8110, EURO CODE 2 AND ACI 318 PROVISIONS
Authors: Amulu CP , Ezeagu CA 
Published: June 2021

This study investigated the effect of combined actions of torsional moments, bending moments and shear forces in reinforced concrete beams with concrete compressive strength of 30N/mm2.The ultimate torsional moments, bending moments, and shear forces of the beams were determined experimentally, through a simple test arrangement set-up on fifteen beam specimens grouped from BC1 to BC5, three beam specimens in each group. The combined loads were induced by loading the test beams at an eccentricity of Â from the beamâ€™s principal axis at the mid-span, using Computerized Universal Testing Machine TUE-C-100. BS 8110, Euro code 2 and ACI 318 were used to calculate the ultimate torsional moments provided by both longitudinal and transverse reinforcements, bending moments and shear forces induced. The values obtained from the codes were compared with those of experimental results for validation. It was observed that Eurocode 2 predicted the highest bending moment of 21.1530kNm, the highest torsional moments of 9.8470kNm and 12.6193kNm, for torsional resistance provided by longitudinal and transverse reinforcements respectively, at an angle crack of 45Â°, while BS 8110 predicted the least values. ACI 318 predicted the highest value of internal shear forces that the beams possessed before yielding to the applied loads.Â http://dx.doi.org/10.4314/njt.v36i3.7
TEORÍA DEL DELITO Y TEORÍA DEL CASO
Authors: Arellano Cruz Jorge , Mendivil Cortez Carmen Virginia 
Published: June 2021

El crimen vino aunado a la humanidad, si nos remontamos al primer hecho delictivo que se vivió en el planeta tierra, el presente trabajo busca realizar un recuento breve de la evolución y los conceptos principales que se relacionan con la dogmática penal, explicar en primera instancia que es el delito, para posteriormente puntualizar y entender el porqué de la aplicación de la teoría del delito en la teoría del caso.
Cabe señalar que estas teorías se encuentran hoy más vigentes que nunca puesto que la parte medular o sustantiva del derecho penal no se afectó con la implementación del nuevo sistema penal acusatorio, de ahí que el argumento relacionado con que la teoría del delito se requiera solo en la audiencia de juicio resulte ser una completa mentira, misma que explicaremos en el presente trabajo, como son de gran importancia estas dos teorías, pero como todo parte de la teoría del delito.
Se pretende establecer la importancia de la aplicación de la Teoría del Delito a la Teoría del Caso, es decir en qué medida se interrelacionan una y otra en el curso del proceso penal acusatorio, que eventualmente permite dar soluciones legales a casos concretos, además de ser un modesto aporte respecto del conocimiento de la teoría del delito aplicada a la teoría del caso.
Reflexiones sobre una criminología teórica y criminología de las profesiones
Authors: Hikal Carreón Wael Sarwat 
Published: June 2021

En el presente artículo de reflexión, se analizan las diferencias entre las llamadas teorías de la criminalidad con las teorías criminológicas, aclarando que las primeras fueron desarrolladas por profesionales no “criminólogos” de primera carrera, sino por otros profesionales, este análisis para incitar a la creación de teorías por parte de criminólogos de formación universitaria, lo que permitirá prestigiar sus conocimientos y capacidades de construcción de la realidad, así como de utilidad implementativa. Por otro lado, se postula la consolidación de una criminología de las profesiones que de parámetros para la ética, habilidades, técnicas, conocimientos, capacidades, monopolio de ejercicio profesional y utilidad en los campos social, empresarial y público. Además de establecer estándares de calidad en la formación universitaria en los estudios de criminología. Se aborda el tema también de la pertenencia a organizaciones de profesionales para lograr objetivos de: demarcación de profesionales calificados para determinado ejercicio; establecer y mantener el nivel profesional de calidad; prácticas honorables; elevación de estatus, y reconocimiento de la profesión por los grupos sociales, empresariales y públicos. Finalmente, el objetivo es reflexionar sobre los elementos que desde la pedagogía, la investigación científica y la profesión, pueden aumentar la calidad en la formación universitaria del criminólogo, para que además, tenga repercusiones en el reconocimiento de este profesional, que mejore su impacto social, científico y laboral.
Control y logística del equipo de transporte Campo Santa Julia S.P.R de R.L.
Authors: ZAZUETA ARGUILEZ CELIA GUADALUPE 
Published: June 2021

Esta investigación da a conocer los resultados de la implementación un sistema de control mediante el uso de GPS, aplicado en la empresa Campo Santa Julia S.P.R de R.L. La cual tiene como finalidad hacer un seguimiento y monitoreo las 24 horas del día de los vehículos de la compañía así como de sus operadores o mayordomos la cual permitirá contar con un control administrativo y un registro de los datos eficientemente, para facilitar la toma de decisiones acerca del desempeño de sus trabajadores.
PEMBELAJARAN KONSTRUKTIVISME SIFAT KOLIGATIF LARUTAN BERORIENTASI GREEN CHEMISTRY UNTUK MENINGKATKAN HASIL BELAJAR
Authors: Riyanti Riyanti 
Published: June 2021

Tujuan penelitian ini untuk meningkatkan hasil belajar kimia sifat koligatif larutan berorientasi green chemistry melalui pembelajaran model konstruktivisme pada siswa SMAN 1 Bangsri. Metode penelitian yang dilakukan adalah penelitian Tindakan kelas yang dilaksanakan di kelas XII IPS1 SMAN 1 Bangsri yang merupakan pelajaran lintas minat tahun pelajaran 2018/2019. Penelitian tindakan kelas menggunakan 2 siklus dengan jumlah siswa 38. Penerapan model pembelajaran menggunakan bahan ajar/LKS konstruktivisme dan pada saat praktikum berorientasi green chemistry. Hasil penelitian yang diperoleh melalui observasi yang mengamati aktifitas siswa dan guru pada siklus I dan II menunjukkan hasil sebesar 2,63 (kurang baik) dan 3,21 (baik). Sedangkan hasil belajar yang diamati berupa kognitif, afektif, psikomotorik, dan menggunakan angket tentang aktivitas pembelajaran dengan hasil belajar kognitif dari siklus I ke II yaitu kriteria baik, aspek afektif menunjukkan kriteria sangat baik, dan psikomotorik kriteria sangat baik. Kesimpulannya adalah model pembelajaran konstruktivisme terbukti dapat meningkatkan hasil belajar siswa pada sifat koligatif larutan berorientasi green chemistry. Untuk meningkatkan hasil belajar lebih optimal lagi diperlukan adanya bahan ajar/LKS yang memadai disertai dengan mendengar respon anak.
A etiologia incomum de pancreatite aguda: será que é hipertrigliceridemia?
Authors: Santos Bárbara Paula da Silva , Santos Héllen da Silva , Costa Lucas Andrade da , Costa Maria de Fátima Andrade da 
Published: June 2021

A hipertrigliceridemia é uma causa rara de pancreatite aguda, porém é uma etiologia bem estabelecida, e valores acima de 1000 mg/dL é suficiente para causar o quadro agudo. Objetivo: apresentar o caso de uma pancreatite induzida por hipertrigliceridemia. Método: relato de caso de paciente admitido em um serviço de urgência/emergência da atenção secundária, sendo constatado seu diagnóstico de pancreatite por tomografia de abdômen e a etiologia identificada por lipidograma. Resultados: O paciente ficou internado por 6 dias e foi submetido ao tratamento preconizado pelas diretrizes de pancreatite aguda, evoluindo com estabilidade hemodinâmica e melhora do quadro.