Journal of Scientific and Engineering Research

1-6

Authors: Abdulazizjon Abdullaev

Several methods for designing of FIR filters have been considered. The advantages and disadvantages of each method have been estimated.

16-24

Authors: Fashina Olugbenga E., Olayiwola Samuel O., Sadiq Mutiu O., Busari Abimbola A.

Nigeria had suffered an unprecedented setback in world economy due to inadequate and inconsistent power generation and supply. This had led to geometrical increase in crime waves, which resulted from youthful exuberances and social menace. The present study is basically on production of photovoltaic system in which solar cell or module is used to power an inverter, this serves as a means of empowering our youth for nation’s socio-economic development through alternative power generation. The system consists of solar modules, solar charge controller, 12V.d.c battery and an inverter (0.5 HP). Solar modules serve as source of charger through solar charge controller to the battery and inverter are used in converting the direct current into an alternating current for the domestic appliance. Self-charging inverter is more economical, noiseless, emission free, portable, rugged and uninterrupted alternate source of electricity which requires less maintenance and no fossil fuel. The estimated energy cost is comparable and competitive with the other inverters and renewable energy sources for both commercial power companies and technology suppliers. The 2KVA inverter with the alternator was able to power a table top refrigerator, Air-conditioning system, plasma TV, and ten 60watts bulbs for 7 hours continuously, before recharged.

31-43

Authors: Ajator U.O., Ezezue A.M., Agu N.

This paper exposed the hazard, health, safety, and environmental threats of construction projects’ processes and operations and investigated the extent to which they are provided for and managed by construction companies and consultants in Nigeria. Sixty construction practitioners and fourty-six design consultants whose operations cut across the six geopolitical zones of the country cooperated in the study. The construction practitioners provided information on the extent to which they implement health and safety systems in construction, while design consultants recorded the extent of provision of design solutions to mitigate the environmental challenges of construction projects. The findings reveal below average application of health and safety provisions by contractors and marginally above average design solutions for controlling environmental challenges. The paper formulated a defacto hazard threshold control framework for use in managing health and safety as well as appropriate management strategies for health, safety and environmental impacts of our construction projects and recommends efficient implementation of the Canons of Health and Safety Management.

48-50

Authors: M. N. O. Sadiku, S. R. Nelatury, S.M. Musa

Software defined everything (SDE) is part of the IT software-driven technologies such software defined networking (SDN), software defined storage (SDS), software defined data center (SDDC), and software defined security (SDS). The shift to software affects essentially any organization that leverages technology. This shift is causing physical items in our daily life to be become software-defined. This paper presents a brief introduction to software defined everything.

59-64

Authors: Sung Bin Han

Diesel engine smoke emissions are known to occur when the injected fuel is not sufficiently mixed with oxygen. A study on the reduction of smoke emission in diesel engines due to the strengthening of environmental pollution regulations is under way. In this study, the cause of smoke emission of diesel engines is aimed. Therefore, the purpose of this study is to analyze the relationship between smoke concentration and experimental variables in terms of combustion engineering by adopting the engine speed and methanol concentration as experiment variables.

75-78

Authors: Lawal Abdu Daura

This paper determines the Greenhouse gas emissions from combustion of fuel in Dana steel rolling mill Katsina, Nigeria. The result shows that the total carbon dioxide equivalent emission from combustion of the fuel oil for the year 2012 was 3,185.803 tonne at the rate of 0.1019 tonne of carbon dioxide per tonne of steel product (tC/t). In the years 2013 and 2014 the CO2e emissions were 1,853.101 tonne and 556.224 tonne at rate of 0.0970 tC/t and 0.0849 tC/t respectively, while in the year 2015 the carbon dioxide emissions was 2,173.599 tonne at rate of 0.1533 tC/t of product. The trend of carbon intensity follows the trend of energy intensity and can be compared with what is obtained in the South East Asian (ASEAN) nation’s bench mark for GHGs intensity in iron and steel industry for hot rolling of long steel products.

82-85

Authors: Heungsu Yi

On the setting of the upper half-space Η of the Euclidian n-space, we give size estimates of partial derivatives of weighted harmonic Bergman functions. Also, we show that for any multi-index β ⃗, there is a function u∈b_α^p satisfying D^β ⃗ u∉b_α^p.

94-97

Authors: Ebegbulem Victoria N., Asuquo, Bassey O., Okon Bassey

This study was carried out to assess the egg production, fertility and hatchability of three genotypes of guinea fowl. The genotypes were: Pearl X Pearl (PXP), Black X Black (BXB) and Black X Pearl (BXP). One hundred and twenty (120) female guinea fowls at point of lay (26 -28 weeks of age), which were first filial generation (F1) progeny of an unselected parent population were used for the experiment. Parameters measured studied were: egg number (EN), Hen-day percentage (HDP), fertility and hatchability. The BXB genotype exhibited significant (P<0.05) superiority in average EN production (3.84) and HDP (54.87%), followed by the BXP genotype with 3.09 EN and 44.16% HDP. Genotype groups did not differ significantly (P>0.05) in their fertility and hatchability rates. Fertility ranged from 67.00 -74.57 %, and hatchability 68.57-75.57% among the genotypes. It was concluded that the BXB genotype be selected for improvement as egg-laying birds and suggested that commercial expansion of guinea fowl production be considered in the rain forest zone of Nigeria, given the high fertility and hatchability percentages.

102-109

Authors: Yousif Jamal Mahbouba, Mohammad Qasim Abdullah

A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force combined with the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum and also to a slight degree on the amplitude, the width of the pendulum's swing.

114-119

Authors: C. Setyawan, C. Y. Lee

Flood and drought events occurred in the tropics has a strong correlation with the hydrological function of a river basin as a rainwater catchment area. The ratio of maximum and minimum river discharge which is known as the coefficient of river regime (CRR) reflects thehydrologicalfunction of a river basin. This study aims to investigate the correlation between CRR with the overland flow (direct runoff) in a yearly basis.Three regimes of overland flow i.e. average, maximum and total of flow were considered for the correlation analysis. A simple hydrologic tank model was used to estimate overland flow and river discharge in the study site. The result shows CRR has a high correlation with the average overland flow. Whereas, maximum and total overland flow indicatesa very low and moderate correlation respectively. The present result provides a basic reference for CRR studies which is still limited.

135-142

Authors: Pascal Timtere, Bomen Cedric

A home security system with alarm and flashing outdoor light was constructed using infrared red sensor, operational amplifier (LM358 as a voltage comparator), NE555 timer, DC battery and relays. The design was carried out using Proteus software. For proper operation, the system is divided into four units; the power supply unit which consists of both the DC battery and main power supply to ensure constant power supply to the circuit; the sensor unit to detect the presence of an intruder and to send a signal to the trigger unit; the trigger unit which is responsible for activating the alarm unit, and the alarm unit that produces an audible sound through a 1 Watt 8 Ω loud speaker, and equally switches ON through a relay a flashing light that can alert the neighborhood. The time out period for the trigger unit was 25 seconds, after which the system returns to its initial operating stage. This security system could be placed in major entrance of a house. It is cheap, reliable (since it uses both DC and AC sources) and effective. It can be used in both rural and urban homes where there are challenges of power supply.

157-161

Authors: Abubaker M. Saeed Hamed, Mohammad Qasim Abdullah

This paper study the stress concentration in one of the important force measuring device (load cell) [1]. The elastic element of load cell have many type but in this paper We will be interested in studying one of the most common types of load cell, we will study the stress concentration [2-4] in one popular spring element design is the binocular configuration, which is a beam with two holes and a web of beam material removed. Therefore we determined the stress concentration in tow design of binocular load cell type using ansys [5] simulation program.

174-183

Authors: Yireobong S. Akpaba, Uwemedimo R. Ebong, Ezenwa A. Ogbonnaya

Over the past few decades, the need for environment preservation consciousness and awareness has been developed worldwide. These have been done progressively and raises concern to all. In response, researchers in all disciplines are obliged to propound developments which are eco-friendly and lead towards sustainable future development. Solar energy is a prodigious renewable energy source which has enormous energy existing as heat and light, convertible into electricity. This research project is based on a modeled Solar Powered Tour Boat, code named “JJUAYS-01”.The boat is powered by the energy processed from solar by minimizing environmental pollution and fuel cost. However, for adverse weather conditions, a backup power system integrated with the photovoltaic cell drives the boat to make the system more self sustaining and reliable.

190-196

Authors: Nayef K. A. Thabet

The phenomenon of wax deposition on inner surfaces of crude oil pipelines and vessels is a serious problem in oil production and transportation. This review describes some state-of-the-art directions in the field of measurement and prediction of paraffin wax deposition growth. A few mathematical models and measuring systems are discussed.

211-215

Authors: Khojakbar S. Daliev

Methods of nonstationary capacitance spectroscopy of deep levels, photoelastic and infrared spectroscopy we studied the behavior of Nickel atoms introduced into the silicon by diffusion, and the crystal growing process. It is shown that in silicon, the diffusion–doped Nickel has two acceptor levels: the EU is 0.41 eV and Ev + 0.20 eV. The efficiency of formation of these defects depends on the temperature and duration of diffusion. Discovered that the Nickel atoms introduced into the silicon when growing electrically neutral. It was shown that prolonged high temperature processing of Si ?at T?1000 ° C? translates a considerable part of Nickel atoms in the electrically active state throughout the volume of the silicon. It is shown that the introduction of Ni diffusion in Si with subsequent annealing leads to a noticeable reduction in the concentration of optically active kisloroda N0опт and deterioration of the optical transparency of the samples Si.

220-229

Authors: Ebegbulem, Victoria N., Ayuba Dauda

The research was done to estimate phenotypic correlations as well as regression among external and internal egg quality parameters of three genotypes of Nigerian guinea fowls. A total of 120 eggs (40 per genotype group) collected from 105 guinea hens at 28 weeks of age, were used for the study. The genotypes were first filial generation crosses of the pearl and black varieties in the mating scheme of Pearl male X Pearl female (P X P), Black male X Black female (B X B), and Black male X Pearl female (B X P). The external parameters were egg weight, egg length, egg width, shell weight, shell thickness and egg shape index, while internal parameters included yolk weight, yolk height, yolk width, yolk index, albumen height and albumen weight. Results of the linear correlations indicated high and positive associations between egg weight and egg length, egg width, shell weight, yolk weight and albumen weight, with figures ranging from 0.701- 0.935 in the P X P homozygous genotype. Very high and positive coefficients of correlation were recorded between yolk height and yolk index (0.915), albumen weight and egg weight (0.895), as well as between egg width and egg shape index (0.773) in the B X B homozygous genotype. Similarly, very high and positive correlation coefficients (ranging from 0.774 to 0.938) were recorded between egg weight and shell weight, shell thickness, yolk weight, as well as with albumen weight in the cross bred genotype. The results of the simple linear regression of egg weight on other egg parameters showed significantly high relationships with albumen weight in the three genotypes (R2= 0.858, 0.802, and 0.880 for PXP, BXB and BXP groups respectively).The stepwise regression analysis however indicated significant relationship between egg weight and egg width (R2 = 0.864) for birds of the PXP genotype, egg weight and shell thickness (R2 = 0.749) for birds of the BXP genotype, and moderate relationship between egg weight and yolk weight, as well as, between yolk width and albumen height (R2 = 0.300 and 0.497 respectively) in the B X P cross bred genotype. It was concluded from the findings of this research that selection and improvement of egg weight in the three genotypes would lead to a consequent improvement in egg length, egg width, shell weight, yolk weight, albumen weight, shell thickness and yolk width given the high correlation coefficients between them.

241-249

Authors: O. O. Adeuyi, M. A. Waheed

With the advent of internet technology banks adopted experts system, this allows banks to provide real-time services to their customers. Electronic banking is the most widely used form of expert system in the banking industry; this has being abused by cybercriminals. This work identified the authentication challenges associated with the use of expert system in the bank; developed rule-based expert system software for card-based transaction using biometric authentication system; and validated the software. A three¬- factor- authentication method was used, a password, token (smart card) and biometric trait (fingerprint), which is an improvement on the existing two-factor-authentication method. The work showed that a properly designed and implemented multifactor authentication method is more reliable and serves as stronger fraud deterrents for card based transactions. It was observed that the users reluctantly accepted biometric authentication, due to religious, social or cultural beliefs. The result also showed a basis on which cardless Automated Teller Machine should be designed and constructed. It can then be concluded that a three¬- factor- authentication method reduces fraudulent transactions to the minimum.

253-260

Authors: Mosiori, Cliff Orori, Maera, John

like CdS, CdSe and CdZnS. In reality, the electric charges that may appear due to certain specific adsorption of the amphoteric hydroxyl group from the complexing agent is assumed to lead to superficial negative charges in the alkaline media of the chemical bath solution and hence positive charges in the acidic chemical bath media. Since the desolating agent is de-ionized water, the nano-particles become charged particles that are peptizable in de-ionized water. But this is only possible with low polarizing counter-ions. When zinc, cadmium and sulphur soluble compound are used, Zn+2 and Cd+2 with S+2 particles formed after co-precipitation in alkaline solution cannot be directly solubilized in water-based growth media. The presence of ‘the primary’ too polarizing counter-ions such as (CH3)NH3+ or NH4+ from the complexing agent that remains after the reaction forms a screening effect on charged particles. This consequently reduces charge repulsion between particles and this increases particles aggregate forming doped thin films whose electrical properties are modified as per the level of doping concentration. This research paper investigated the effect of Zinc nano-particles on cadmium sulphide thin film’s electrical properties as a function their as-deposited thicknesses. Solution technique was used to grow thin films on ordinary microscope substrate slides from aqueous solutions of Zn+2 and Cd+2 with S+2 ions in the presence of TEA. By varying its deposition time only to obtain eleven (11) samples, resistance was measured using a two point probe while its conductivity type was measured using a Gauss meter as a function of their thicknesses. The thin films were found to be n-type semiconductors with a very high valence electron density, a band gap of 2.43 eV, an average transmittance above 79% on in the VIS - NIR region and a resistivity of 9.5×101 – 1.22× 102 Ω-cm. Sheet resistivity increased with an increase in Zn ion concentration.

278-290

Authors: Yanhong Yang

By the principle of using sufficiently the property of circulant matrix and based on the technique of matrix iterative method, we set up a new circulant and block-diagonal splitting method for solving the Toeplitz systems. Moreover, we present a successive overrelaxation acceleration scheme for the proposed splitting iteration. Theoretical analysis shows that if given reasonable restrictions for the parameter of the Toeplitz matrix, the new splitting method is convergent.