Journal Engineering International-
Engineering International; doi:10.18034/ei
Engineering International, Volume 6; doi:10.18034/ei.v6i1.1091
Engineering International, Volume 6; doi:10.18034/ei.v6i1.1086
Engineering International, Volume 6; doi:10.18034/ei.v6i1.1087
Engineering International, Volume 5; doi:10.18034/ei.v5i2.1084
Engineering International, Volume 6; doi:10.18034/ei.v6i1.1085
Engineering International, Volume 5; doi:10.18034/ei.v5i2.1083
Engineering International, Volume 5; doi:10.18034/ei.v5i2.1081
Engineering International, Volume 5; doi:10.18034/ei.v5i2.1082
Engineering International, Volume 6, pp 29-34; doi:10.18034/ei.v6i1.172
Engineering International, Volume 6, pp 35-62; doi:10.18034/ei.v6i1.173
Engineering International, Volume 6, pp 21-28; doi:10.18034/ei.v6i1.171
Engineering International, Volume 6, pp 7-20; doi:10.18034/ei.v6i1.170
Engineering International, Volume 6, pp 107-128; doi:10.18034/ei.v6i2.229
Engineering International, Volume 6, pp 129-142; doi:10.18034/ei.v6i2.230
Engineering International, Volume 6; doi:10.18034/ei.v6i2.227
Engineering International, Volume 6, pp 93-106; doi:10.18034/ei.v6i2.228
Engineering International, Volume 6, pp 63-74; doi:10.18034/ei.v6i2.223
Engineering International, Volume 5; doi:10.18034/ei.v5i1.1062
Engineering International, Volume 5; doi:10.18034/ei.v5i1.977
Engineering International, Volume 5; doi:10.18034/ei.v5i1.976
Engineering International, Volume 5, pp 45-52; doi:10.18034/ei.v5i2.177
Engineering International, Volume 5, pp 9-26; doi:10.18034/ei.v5i1.174
Engineering International, Volume 5, pp 27-36; doi:10.18034/ei.v5i1.175
Engineering International, Volume 5, pp 53-62; doi:10.18034/ei.v5i2.178
Engineering International, Volume 5, pp 75-82; doi:10.18034/ei.v5i2.180
Engineering International, Volume 5, pp 63-74; doi:10.18034/ei.v5i2.179
Engineering International, Volume 5, pp 37-44; doi:10.18034/ei.v5i1.176
Engineering International, Volume 4; doi:10.18034/ei.v4i1.902
Engineering International, Volume 4; doi:10.18034/ei.v4i1.900
Engineering International, Volume 4; doi:10.18034/ei.v4i1.901
Engineering International, Volume 4; doi:10.18034/ei.v4i2.969
Engineering International, Volume 4; doi:10.18034/ei.v4i2.909
Engineering International, Volume 4; doi:10.18034/ei.v4i2.907
Engineering International, Volume 3; doi:10.18034/ei.v4i1.826
Abstract:Job satisfaction can simply be defined as the feelings people have about their jobs. As most people spend a major part of their adult life at work, job satisfaction is an important element of individual wellbeing. Employers always try to maintain high level job satisfactions of their employees to get best services of them, because job satisfaction inspires the workforce to work honestly and efficiently. There are many factors which play vital role in the job satisfaction of an employee. We summarize them by five factors namely payment, supervision, promotion opportunities, environment of the workplace and the work itself. Using these facets, we establish a new method to measure job satisfaction level of an employee in percentage. We illustrate our method with the help of an example.
Engineering International, Volume 3; doi:10.18034/ei.v3i1.766
Abstract:The modern world is a full of contamination of radiofrequency (RF), “electrosmog” in the urban centers especially after the rapid introduction of mobile telecommunications systems. The aim of this study is to determine the impact on population of house sparrow, Passer domesticus by electromagnetic radiation (microwaves) from phone antennae. By monthly monitoring in urban and rural area, it is found that the population of house sparrow is declining in the urban area, where cell phone towers are more as compared to the rural area in every season.
Engineering International, Volume 4; doi:10.18034/ei.v4i1.825
Abstract:Free vibrating motion can take place in an acoustic media. This motion can be steady hence have constant periodic variations or unsteady and thus experience light damping or heavy damping. We give a modeled analysis of unsteady periodic motion of an oscillator in a cylindrical acoustic medium that allow such waves to be transmitted through them. This has been approached by calculating variation within the proposed boundary functions and boundary potentials. Limitations for these calculations have been done depending on the time, and how free oscillations are expected to behave in cylinder carrying a suspended mass. This work investigated motion by constructions that interact with their environment with the acoustic media. Since the dynamics considered here were very complex, modeling the system with one grade of free motion and applying different types of constructions whether ground, underground, cylindrical, spherical constructions and containers was considered. This work borrowed heavily on the modeling of seismic and blast waves as modeled with rigid inclusions containing elastically fastened mass interacting continuous solid medium. This study joined motion of any continuous medium with other discrete systems. The results displayed measurement systems for wave processes having interference at their eigen- frequencies just like those under seismic wave interactions and this work considered the result as similar to those in discrete systems.
Engineering International, Volume 4, pp 49-56; doi:10.18034/ei.v4i2.186
Engineering International, Volume 4, pp 19-24; doi:10.18034/ei.v4i1.182
Engineering International, Volume 4, pp 9-18; doi:10.18034/ei.v4i1.181
Engineering International, Volume 4, pp 63-72; doi:10.18034/ei.v4i2.188
Engineering International, Volume 4, pp 35-40; doi:10.18034/ei.v4i1.184
Engineering International, Volume 4, pp 41-48; doi:10.18034/ei.v4i1.185
Engineering International, Volume 4, pp 57-62; doi:10.18034/ei.v4i2.187
Engineering International, Volume 4, pp 25-34; doi:10.18034/ei.v4i1.183
Engineering International, Volume 3; doi:10.18034/ei.v3i2.775
Abstract:Moringa oleifera (M. oleifera) has been considered as medicinal plant and food substance since ancient times. Nowadays various therapeutic effects of M. oleifera such as antimicrobial, anticancer, anti-inflammatory, antidiabetic, and antioxidant effects have been successfully investigated. In this study, the main objective was to optimize M. oleifera leaf-methanol extraction using Design of Experiment (DoE) software with response surface methodology in terms of temperature and incubation time by sonication. The other objective was to investigate anti-cancer activity (breast cancer cell: MCF-7) by M. oleifera methanol extraction incorporation with microtitrate tetrazolium (MTT) assay. In this research, the optimum condition for leaf extraction was found to be temperature 50⁰C and incubation time 45 min with medium frequency at sonication and it obtained 88.39% cancer cell growth inhibition by this condition. Extracted leaves inhibited MCF-7 cell line with 87.13% in average at wavelength A570nm.
Engineering International, Volume 3; doi:10.18034/ei.v3i2.773
Abstract:This study has been made an attempt to describe the one of the most essential bibliographic laws i.e. Bradford law of scattering to test the scholarly publications of energy and environment in Australia. A total of 2802 papers published, out which 83.4% were journal articles and 99.7% were in the English language. According to Australian research, the output of Environmental Sciences Ecology (13.807%) account for the largest increase and it is occupied in the first place and Energy Fuels (6.208%) is in the 6th place during the present study. The three most productive journals with high citations were ‘Ecological Applications’ (= 4, 2721 citations), ‘Astrophysical Journal’ (= 44, 1614 citations), and ‘Monthly notes of the Royal Astronomical Society’ (= 38, 1389 citations) and the maximum number of citations contributed by ‘BAZZAZ FA’ from Harvard University, USA. In this study, based on the speculative aspects of Bradford’s Law of Scattering is tested and identified that the ratio depicts that it does not fit into the Bradford’s law of distribution.
Engineering International, Volume 3; doi:10.18034/ei.v3i2.770
Abstract:Seven-segment display is well-known for displaying the English numerals form 0-9. In this paper 9-segment display for both Bengali and English digits have been proposed. Our proposed 9-segment display is more effective than the previously proposed 10-segment, 11-segment, 16-segment and 8-segment display for both Bengali and English as well as 9-segment, 10-segment and 18-segment display Bengali digits. It is an improvement of previously proposed segment display for both Bengali and English digits.
Engineering International, Volume 3; doi:10.18034/ei.v3i2.771
Abstract:The E-Commerce is prospered and stands for booming growth in Rural India. Their success depends on the understanding of the market, quantity of consumers and offering various features. This paper gives an impact of digital India in the future of E-Commerce in Rural India; represent the various opportunities for vendors, consumers, E-Commerce Industries and factors influencing trust in rural Indians. We found that the Overall E-Commerce will increase drastically coming years in the emerging market. While rural area availability of internet or broadband is lower as compare to urban area but Government’s dream project Digital India will control or fixed this gap which increases the mass of consumers for E-Commerce world through spreading business using social commerce (Facebook Commerce, Twitter Commerce), mobile commerce etc. with adopting Digital India project features like creation of digital infrastructure and digital literacy. Combination of E-Commerce and Digital India project make easier contact can be made to anywhere in the world in seconds. By online trading, businesses open themselves in global marketplace. Indians should call Digital India Vision or Digital Bharat Vision or Digital Hindustan Vision projects moving forward. This paper is concerned with current scenario of internet users in India, how government campaign “Digital India” can connect maximum number of rural Indians to all over the world through Internet and how E-Commerce Industries can convert this mass of rural Indians for trading.
Engineering International, Volume 3; doi:10.18034/ei.v3i2.774
Engineering International, Volume 3; doi:10.18034/ei.v3i2.772
Engineering International, Volume 3; doi:10.18034/ei.v3i1.765
Engineering International, Volume 3; doi:10.18034/ei.v3i1.764
Abstract:A research work was undertaken at The Department of Civil Engineering of University of Asia Pacific (UAP), Dhaka, Bangladesh during April to November 2015. Biaxial bending means the column is carrying bending by one or both axis with axial load and with calculations it is possible to put those unique values into a pattern to make an interaction diagram with balanced failure zone, tension failure zone and finally compression failure zone of a short or slender column. By using programming it is possible to make the calculations in seconds. The method is to make functions and calling them to solve certain specific values to generate the diagram pattern. The outcome was diagram data generating application having the ability to combine programming and “Civil Logic”. This is made for students and Civil Engineers who want to make interaction diagrams for designing a short, square and even slender columns with ease.
Engineering International, Volume 3; doi:10.18034/ei.v3i1.763
Engineering International, Volume 3, pp 53-56; doi:10.18034/ei.v3i2.189
Engineering International, Volume 3, pp 75-86; doi:10.18034/ei.v3i2.192
Engineering International, Volume 3, pp 9-14; doi:10.18034/ei.v3i1.195
Engineering International, Volume 3, pp 87-96; doi:10.18034/ei.v3i2.193
Engineering International, Volume 3, pp 57-64; doi:10.18034/ei.v3i2.190
Engineering International, Volume 3, pp 65-74; doi:10.18034/ei.v3i2.191
Engineering International, Volume 3, pp 97-103; doi:10.18034/ei.v3i2.194
Engineering International, Volume 3, pp 45-52; doi:10.18034/ei.v3i1.198
Engineering International, Volume 3, pp 35-44; doi:10.18034/ei.v3i1.197
Engineering International, Volume 3, pp 15-34; doi:10.18034/ei.v3i1.196
Engineering International, Volume 2; doi:10.18034/ei.v2i2.716
Engineering International, Volume 2; doi:10.18034/ei.v2i2.715
Abstract:Kithul (Caryota urens) flour has better gel-forming ability among other flour in the food industry. This study aimed to utilization of Kithul flour as substitute to existing plant origin gelling agent for food applications of vegetarians .Fruit based desserts can be produced using Kithul flour as the gelatinizing agent. This wood apple based dessert is the best example for that. The selected best sample with 1:1.5 flour: fruit pulp ratio, gave acceptable results as SLS standards 586:1982 and SLS standards 729:1985 for the tests done (sensory evaluation, Microbial analysis, pH and brixº). According to the shelf life studies the product with added preservatives can be kept at room temperature for 2 months in acceptable condition (sensory and microbiologically) .According to the proximate analysis energy generation from 100g of the product is 262.28 Kcal. Compared to fruit jellies which prepared by pectin as plant-based gelling agent, Kithul dessert has more nutrients, and considerable amount of minerals with less carbohydrate and low calorie. This is a cost effective product which can earn considerable profit by marketing as a nutritious dessert by combination of high swelling flour with seasonal fruit.
Engineering International, Volume 2; doi:10.18034/ei.v2i2.714
Engineering International, Volume 2; doi:10.18034/ei.v2i2.717
Abstract:This article gives some proposals on how to grow silver nanoparticles using different methods. Dilute silver salts are recommended as the metal precursor starting solutions. The formation of the silver nanoparticles is to be monitored using UV-Vis absorption spectroscopy so as to reveal the formation of silver nanoparticles and how they will exhibit surface plasmon absorption maxima at 418-420 nm from the UV–Vis spectrum. The Mie light scattering theory will be applied and the experimental results analyzed to show the diameter of silver nanoparticles in colloidal solution. Energy-dispersive spectroscopy (EDX), X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV–Vis spectroscopy are proposed to be used to characterize the formed silver nanoparticles obtained. The energy-dispersive spectroscopy (EDX) of the nanoparticles dispersion will confirm the presence or absence of elemental silver signal peaks. The size and morphology of the formed silver nanoparticles will be determined by transmission electron microscopy. The synthesized silver nanoparticles will be structurally characterized by using X-ray diffraction and transmission high-energy electron diffraction (HEED) and the peaks in the XRD pattern will be compared to the standard values of the face-centered-cubic form of metallic silver (ICCD-JCPDS card no. 4-0787).
Engineering International, Volume 2; doi:10.18034/ei.v2i2.719
Engineering International, Volume 2; doi:10.18034/ei.v2i1.129
Abstract:The parameters of crystalline semiconductor such as types of semiconductor, uniformity of impurity concentration of doped wafer, majority charge carrier concentration, sheet resistivity of doped wafer surface play an important role in solar cell fabrication process during emitter diffusion, that is the most critical step. In this paper, we have used a low cost in house made hot probe measurement setup. A hot plate was used to heat up the wafer up to 100°C. Two k-type thermocouples were placed simultaneously in contact with the hot and cold surface of the wafer to measure the temperature in situ for both hot and cold probe. We have used two copper probes with a voltmeter connected to measure the potential difference (thermoelectric voltage) between two probes for various temperatures up to 100°C with an interval of 10°C. We have taken measurement for commercial silicon wafer (thickness 200 µm) and one side polished 4 inch diameter Si wafer (thickness 660 µm) to determine the wafer type (n-type or p-type). We also calculated thermo-power or Seebeck coefficient from the voltage vs. time curve, that is constant for particular substrate. As a process monitoring tool for solar cell fabrication process, after n-type diffusion using POCl3 on p-type silicon wafer of thickness 200 µm, we have done wafer mapping that gives us the information of doping uniformity over the whole surface of wafer both front and back side
Engineering International, Volume 2; doi:10.18034/ei.v2i1.127
Abstract:This paper presents a general framework for planning a multipurpose robot which can be used in multiple fields (both civil and military). The framework shows the assembly of multiple sensors, mechanical arm, live video streaming and high range remote control and so on in a single robot. The planning problem is one of five fundamental challenges to the development of a real robotic system able to serve both purposes related to military and civil like live surveillance(both auto and manual), rescuing under natural disaster aftermath, firefighting, object picking, hazard like ignition, volatile gas detection, exploring underground mine or even terrestrial exploration. Each of the four other areas – hardware design, programming, controlling and artificial intelligence are also discussed.
Engineering International, Volume 2; doi:10.18034/ei.v2i1.126
Abstract:This paper presents development of k-e turbulence model which can be applied for non-homogeneous two-phase turbulent flows. The improvement of governing equations of k-e turbulence model is based on the decomposition of the two-phase flows into the gas phase and the second phase. Thus, the turbulent kinetic energy k and the turbulent dissipation rate e variables in k-e two-equation model are substituted by the turbulent kinetic energy kg of the gas phase, the turbulent kinetic energy kp of the second phase, the turbulent dissipation rate eg of the gas phase and the turbulent dissipation rate ep of the second phase. The new turbulence model is kg-kp-eg-ep four-equation model which can be used to solve all of two-phase flows in nature studies and engineering applications.
Engineering International, Volume 2; doi:10.18034/ei.v2i1.130
Abstract:The Hall effects on the steady MHD boundary layer flow of an incompressible fluid of combined heat and mass transfer over a moving inclined plate in a porous media with suction and viscous dissipation has studied. An external magnetic field is applied perpendicular to the surface and the fluid motion is subjected to a uniform suction and injection. A closed form solutions of the equations governing the flow are obtained for the velocity, secondary velocity, and temperature and concentration profiles. The dimensionless governing equations are solved using R-K method along with shooting technique. The velocities, temperature and concentration profiles are presented graphically for different values of governing flow parameters. The results presented graphically illustrate that primary velocity field decrease due to increase of magnetic parameter, angle of inclination, permeability parameter and suction parameter while secondary velocity also decrease for magnetic parameter, Hall parameter and permeability parameter .Other parameters increase the velocities of the fluid flow. Temperature field increases in the presence of Magnetic parameter, Grashof number, Modified Grashof number and permeability parameter and decreases for Prandlt number and suction parameter. Also, concentration profiles decreases for increasing the values of magnetic parameter, Hall parameter, Schmid number and suction parameter but there is no effect on concentration of the remaining parameters. Also the skin friction coefficient, the local Nusselt number and the local Sherwood number are presented in Tables 1-3.
Engineering International, Volume 2; doi:10.18034/ei.v2i1.128
Abstract:Electronic devices and integrated systems are reduced to the size of micron and nanometer level and it becomes particularly important to predict the thermal transport properties of the components. Because of a unique structure and novel properties of carbon nanotubes (CNTs) have attracted significant attention. In this article, thermal transport properties of single wall CNTs (SWCNTs) are introduced. Combining equilibrium and non-equilibrium molecular dynamics with carbon potentials, we have studied the thermal conductivity of carbon nanotubes and its dependence on temperature. Phonon conduction depends on band gaps as well as thermal contact resistance of metallic CNTs, governed by phonon scattering and it shows evidence of 1-D quantization of the phonon band structure. We have studied here the thermal conductivity of single wall nanotubes dependence on chirality structure, dimensions of tubes, defects and vacancies in tubes. We found that the single wall carbon nanotubes have very high thermal conductivity comparable to diamond crystal and in-plane graphite sheet.
Engineering International, Volume 2, pp 21-27; doi:10.18034/ei.v2i1.204
Engineering International, Volume 2, pp 72-78; doi:10.18034/ei.v2i2.200
Engineering International, Volume 2, pp 9-20; doi:10.18034/ei.v2i1.203
Engineering International, Volume 2, pp 38-42; doi:10.18034/ei.v2i1.206
Engineering International, Volume 2, pp 28-37; doi:10.18034/ei.v2i1.205
Engineering International, Volume 2, pp 43-62; doi:10.18034/ei.v2i1.207
Engineering International, Volume 2, pp 63-71; doi:10.18034/ei.v2i2.199
Engineering International, Volume 2, pp 87-90; doi:10.18034/ei.v2i2.202
Engineering International, Volume 2, pp 79-86; doi:10.18034/ei.v2i2.201
Engineering International, Volume 1; doi:10.18034/ei.v1i2.120
Engineering International, Volume 1; doi:10.18034/ei.v1i2.122
Engineering International, Volume 1; doi:10.18034/ei.v1i2.123
Engineering International, Volume 1; doi:10.18034/ei.v1i2.124
Abstract:Until 90, water management plans in Bangladesh focused mainly to controlling floods and facilitates drainage and irrigation which were segregate plans, and caused detrimental effects of other sectors such as water supply, sanitation, industry, fisheries plus environmental and other in-stream demands. For avoiding the fragmentation, the country has achieved a remarkable progress in Integrated Water Resources Management (IWRM) activities after the period of 90.The Flood Action Plan (FAP, 1989-1995) was the pioneer of IWRM plan in Bangladesh. In 1995, Government approved The Bangladesh Water and Flood Management Strategy (BWFMS) which was an outcome of FAP. Under the recommendation of BWFMS, Bangladesh prepared NWPo and NWMP which were the holistic and government approved documents for applying integrated water resources practice in Bangladesh.The European Union has a long experience for basin wide integrated water resources management within Europe. The European Parliament and the Council of the European Union established a framework for Community action in the field of water policy in 23 October 2000 European Union’s water policies such as the Water Framework Directive (2000/60/EC). The EU’s experience (including its 27 Member States) is based on the best scientific knowledge and available technologies. In particular, the Water Framework Directive (2000/60/EC) mainly focuses on river basin management rules and principles. It is recognized that the Water Framework Directive (WFD) might be used as an example for basin wide IWRM implementation and economic development for the developing countries like Bangladesh, taking into account their socio-economic conditions.This study will show that, how the European Union Water Framework Directive (WFD) model can be adapted for the effective implementation of integrated water resources in Bangladesh. A Common Implementation Strategy (CIS) has been depicted for sustainable IWRM in Bangladesh.
Engineering International, Volume 1; doi:10.18034/ei.v1i2.121
Abstract:Climate variability and extreme events have wide range economic, social and environmental impacts. In adaptation of these impacts, it is very important to assess and change the perception and awareness level of local community to climate variability and adaptation responses. Assessing the indigenous adaptation mechanisms and adaptation capacity is the integral part in addressing the adverse consequences of climate variability. There was no study, which assessed the adaptation to climate variability with integrating community perception in the study area. Thus, this study was aimed to fill this gap. The study has shown that, majority of participants were observed the existence of climate variability and indicators, But significant number of participants failed to perceive the causes of the variability. The effects of climate variability in the study area are land degradation, deforestation, decline of crop production, death of livestock, loss of grazing land, and destruction of infrastructures. The local communities have own adaptation methods, which include, production of different crops, planting of special variety crops, using of natural and chemical fertilizers, irrigation farming, planting of trees, and soil conservation. Adjusting the production season with the variability of climate is other cope up mechanism of farmers. The participants had problems with materials, financial and training supports from NGOs and governments.
Engineering International, Volume 1, pp 39-48; doi:10.18034/ei.v1i1.118
Abstract:Advanced technology emergence in the field of petrochemical-based polymers has brought many benefits to mankind. It is validating that the ecosystem is considerably disturbed and damaged as a result of the non-degradable plastic materials used for disposable items. This paper relates the use of hybrid bio-composites, which is eco-friendly and easily degradable. Previous literature related to hybrid bio-composites proves its eco-friendly and excellent degradable properties. In this paper, banana and sisal fibers were selected to execute the hybrid bio-composite preparation with poly lactic as its matrix. Specimens were made with and without fibre treatment and their mechanical properties like tensile, flexural and impact were evaluated as per the standard test procedures. The test results obtained evident that the treated fibers having the best mechanical properties than pure PLA and untreated fibre bio-composites. The chemical treatment also improved fiber matrix interaction by removal of lignin and hemicellulose, which led to the better incorporation of fiber with the matrix. The SEM micrographs of untreated banana/sisal fibre reinforced PLA bio-composites and treated banana/sisal fibre reinforced PLA bio-composites clearly indicated the extent of the fiber-matrix interface adhesion.
Engineering International, Volume 1; doi:10.18034/ei.v1i1.117
Abstract:In this paper, the study of the steady two-dimensional flow of an incompressible viscous fluid with heat and mass transfer and MHD heat generation past a moving vertical plate with suction in the presence of viscous dissipation and chemical reaction is investigated. Using similarity variables, the governing partial differential equations are transformed into non-linear ordinary differential equations. These equations are then solved numerically using fourth order Runge-Kutta method with shooting technique. The flow variables are presented graphically. The graphs showed that velocity rises for increasing Grashof number, mass Grashof numer, suction, heat generation and Eckert number while reducing with increasing magnetic parameter, Schmidt number, and chemical reaction parameter and Prandtl number. Comparisons with previously published work are performed and are found to be in an excellent agreement.
Engineering International, Volume 1; doi:10.18034/ei.v1i1.119
Engineering International, Volume 1, pp 9-17; doi:10.18034/ei.v1i1.115
Abstract:A high performance solar collector was developed to modify agricultural building environment such as dairy, poultry farm buildings and greenhouses. Moreover it should be efficiently utilized as a solar dryer for drying various agricultural products and by products. The materials used include steel sheet with high performance of reflecting light, absorber tube, and angle iron and fully insulated drying chamber. A CPTSC was a tilted at 340south (Equivalent to the latitude of Peshawar) Pakistan. A CPTSC a total reflecting surface area was 2.9 m2 respectively. The absorber tube having a surface of 0.376 m2 was fixed in front of the reflector at the distance equal to the focal length. The total volume of drying chamber was 0.3135 m3. An experiment was conducted to enhance the efficiency of the CPTSC and two air mass flow rate treatments were tested with normal and convective mass air flow rate, 0.6 kg. Min-1 and 1.72 kg. Min-1 under the average temperature of the month (January, February and March, 2012). Moreover, the process was replicated three times under the completely randomized design. The result showed that both air mass flow rate and average temperature of the month significantly effected the efficiency of a concentrating parabolic trough solar collector. The new model of a CPTSC increased the efficiency from 8 to 25 % with increase in both air mass flow rates and average temperature of the months. Therefore it is concluded that the solar collector efficiency increased with increasing air mass flow rate.
Engineering International, Volume 1; doi:10.18034/ei.v1i1.116
Abstract:Recent advancement and grown up technologies has enabled the development and implementation of low-cost, energy efficient and versatile sensor networks. Sensor networks are built up with sensors that have the ability to sense fiscal or environmental property. Assumption can be made that Wireless Sensing Network (WSN) is able to sense environmental conditions at Nano and gaseous level. In this paper, first the system architecture of WSN is described. The network may maintain several architectural protocol and topologies. WSN provides some services which are maintained by layered architecture. Another important issue regarding wireless networking is the security challenges. This work guided to a concept of several security issues and discussion to overcome the challenging issues.
Engineering International, Volume 1, pp 49-61; doi:10.18034/ei.v1i1.217
Engineering International, Volume 1, pp 18-26; doi:10.18034/ei.v1i1.214
Engineering International, Volume 1, pp 27-38; doi:10.18034/ei.v1i1.215
Engineering International, Volume 1, pp 9-17; doi:10.18034/ei.v1i1.213
Engineering International, Volume 1, pp 39-48; doi:10.18034/ei.v1i1.216
Engineering International, Volume 1, pp 101-113; doi:10.18034/ei.v1i2.212
Engineering International, Volume 1, pp 62-70; doi:10.18034/ei.v1i2.208
Engineering International, Volume 1, pp 80-92; doi:10.18034/ei.v1i2.210
Engineering International, Volume 1, pp 71-79; doi:10.18034/ei.v1i2.209
Engineering International, Volume 1, pp 93-100; doi:10.18034/ei.v1i2.211