International Research Journal of Multidisciplinary Technovation
EISSN : 2582-1040
Published by: Asian Research Association (10.54392)
Total articles ≅ 222
Latest articles in this journal
Published: 14 October 2022
International Research Journal of Multidisciplinary Technovation pp 14-25; https://doi.org/10.54392/irjmt2262
The aim of the study was to investigate the effect of an adjustable vacuum distribution device on seed pick-up similarity of a multiple-rows pneumatic plate metering device due to unequal rows performance. A completely vacuum opened angle of the device (30°), Six vacuum opening angles (5°, 10°, 15°, 20°, 25° and 30°) and different angles set up on rows (4°, 7°, 10° and 30° through row 1,2,3, and 4, respectively) were separately examined at six rotating speeds. Results revealed that under same speed and same vacuum opening angle, an increase in vacuum provided more consistent rows pick-up, while increase in angle increased rows pick-up coupled with the increase in their variation. Row1 and row4 generally tend to have the highest and lowest seed pick-up, respectively, under most of investigated angles and speeds. Rows consistency CV declined under the increase of both opening angle and velocity. Results of different rows angles set up were found to be better than those of the same angle. Different rows angles resulted in better rows CV value of 2.01%, 1.78%, 1.89%, 1.34%, 1.77% and 2.45% at speed of 5, 10,15,20,25 and 30 r.min-1, respectively. Results concluded that vacuum distribution device could be acceptably used for improving rows performance, but further studies are necessary to develop an outside-control method for easy application.
Published: 5 October 2022
International Research Journal of Multidisciplinary Technovation pp 1-13; https://doi.org/10.54392/irjmt2261
Weight estimation of materials from their characteristic density has a great advantage on analyzing the basic weight parameter put at initial stage of the project. During the detail design stage, each component is designed with basic dimensions and material selection. The selected weight will be verified with other materials such as steel, aluminum and composites. The total weight of the Quadcopter when made of steel, aluminum and composites are compared with the reference value of parameter, total component weight and then the bets material will be recommended for the Quadcopter airframe. The composite materials are found to be light and strong when compared to steel and aluminum frames. If we use this material the Quadcopter will have more flight time for spraying.
Published: 30 September 2022
International Research Journal of Multidisciplinary Technovation pp 18-26; https://doi.org/10.54392/irjmt2253
In practice, the slab foundation is used widely in civil engineering. Besides the concrete material, fiber concrete is applied more popular in the slab foundations. Determining the ultimate load of the slab foundations is a complex problem due to the relation of the soil-structure interaction (SSI) problem, which depends on both the structures and the subsoil characteristics. ANSYS is a finite element software which is a reliable and effective technique to simulate the structure model. This paper aims to determine the ultimate load of the fiber-reinforced concrete slab on the ground subjected to the concentrated load by ANSYS software. The nonlinear material of the structure and the subsoil will be considered in this work. The validation test of the numerical model will be through the experiment data. This study has shown that the numerical model is reliable for the structure design.
Published: 29 September 2022
International Research Journal of Multidisciplinary Technovation pp 8-17; https://doi.org/10.54392/irjmt2252
The review aimed at understanding landscape diversity in the face of global population pressure, agricultural land shortages, food insecurity, and climate insecurity. We used published literature to determine whether landscape diversity improves resilience to climate change. Literature searches were performed using the Science Direct database, Google Scholar search engine, and the professional network ResearchGate using keywords. Land degradation, soil resilience, and natural resources from 2000 to 2019. 120 publications were searched, including journal articles, reports, and book chapters. Of these, 68 were considered more relevant and all were read and considered in writing this review. Climate change, food insecurity, and land degradation have been established to be major challenges for developing countries leading to the loss of genetic diversity. Our results show that the loss of proper habitat may allow fast-growing invaders to occupy the remaining limited resources. Therefore, alien species may accelerate invasion under human-induced land-use changes during times of global change. The time lag between range expansion and habitat loss has been thwarted. A golden window to prevent the spread of alien species established in the habitat.
Published: 1 August 2022
International Research Journal of Multidisciplinary Technovation pp 1-7; https://doi.org/10.54392/irjmt2251
PmAP and PmAP/WO3 composite are synthesized by chemical oxidation polymerization process. Synthesized materials are investigated by UV Visible, SEM and cyclic-voltagram (CV) techniques. SEM study of as prepared materials is indicated formation of different sized crystals (small and aggregated). In UV Visible spectra analyses, both transitioned (i.e., π-π* transition and charge transfer of polaron band) are observed. Tauc expression is used to estimate optical band gap. Estimated optical band gap is to be 3.09 eV. Oxidation-reduction potential profile is detected in cyclic voltammetry (CV) analyses of PmAP and PmAP/WO3 composite.
Published: 30 July 2022
International Research Journal of Multidisciplinary Technovation pp 29-38; https://doi.org/10.54392/irjmt2245
Starting voltage and current transients in slip energy recovery drives (SERD) may damage the stator and rotor windings. The resulting torque oscillations damage the induction machine mechanical parts. In this paper three schemes for damping starting transients and torque oscillations are proposed. In the first scheme a parallel RL impedance is connected between the supply and the stator coils, in the second scheme a parallel RL impedance is added in the rotor circuit, and in the third scheme the two impedances are connected simultaneously. Transient performance is simulated and the results of the three schemes are compared. Also, the effect of each proposed scheme on the steady state values of the SERD currents, voltages, and electric torque is studied and demonstrated. Lower current and voltage transients, and lower torque oscillations resulted in all schemes, with optimum transient performance observed when adding the two impedances simultaneously.
Published: 29 July 2022
International Research Journal of Multidisciplinary Technovation pp 22-28; https://doi.org/10.54392/irjmt2244
Previous studies showed that chemical modified Bacillus subtilis biomass possessed the high potential for recovery rare-earth elements, and, in this study, mathematical models were applied to explain the B. subtilis biomass La3+ and Sm3+ ions sorption capacity. The experimental isotherm data were analyzed using Langmuir, Freundlich, Temkin, and DRK equations. Both Langmuir and Freundlich isotherms models that fit the equilibrium data. Temkin model showed that it occurs physisorption. In more dilute solutions, the adsorption preference follows the order La3+ > Sm3+. With the increase in the concentration of rare-earth elements, there is an inversion in the preference for Sm3+ > La3+. The results demonstrate that the optimum model for describing the kinetics of the biosorption of both rare-earth elements is the pseudo-second-order model as well as the viability of recovering lanthanum using bacterial biomass sorbents, a practical technique.
Published: 27 July 2022
International Research Journal of Multidisciplinary Technovation pp 14-21; https://doi.org/10.54392/irjmt2243
This work was excuted during seasons 2018/2019, and 2019/2020, in Tayba Block-the Sudan - Gezira central clay plains, to evaluate the field operation performance of four land preparation methods using three tillage equipment: chisel plow "intensive tillage", disc harrow "medium tillage", ridger "minimum or reduced tillage" and no tillage machine. An overall operation index is estimated from four measured machine operating characteristics. Diagnosis of land preparation methods was made using analytical hierarchy method for weight assignment for assignment of relative weights for the operating parameters, and compromise programming technique for ranking of tillage methods. The experiment was conducted as a factorial experiment with RCBD, the LSD test at 1%and 5 % was used to compare between means. Results indicate that no significant differences (P<0.05) in field efficiency between Chisel plow and ridger and harrow showed the least efficiency value. There is significant differences in fuel consumption rate between all treatments with highest consumption is by Chisel plow and lowest is by ridger. The significantly highest rear wheel slippage is attained by ridger while there is no significant differences in that resulted from chisel or disc harrow. The significantly highest field capacity (P<0.05) is attained by ridger followed by harrow and then chisel plow. The analytical hierarchy procedure ranked the machines operation indicators in descending order by weight values of 1.02, 0.62, 0.29 and 0.12 for. Multi-criteria analysis by compromise programming technique results in overall indices of tillage equipments: ridger, chisel plow, disc harrow in descending values of 67.53, 61.00, and 57.29 respectively. The overall performance index (OPI) for the operation of the agricultural equipment could be used to take the tillage decision-making process by selecting the most effective machinery to give optimum seed bed with minimum energy input. However, it is not possible to calculate the overall index for no tillage method because without using a machine there is no fuel consumption, no field efficiency, no field capacity, and no wheel slippage. This imply that for heavy clay soils of Gezira Scheme and in other similar environments it is recommended to use reduced tillage "ridging only" as the most technically feasible tillage method, other wise use chisel plowing if funds are available.
Published: 27 July 2022
International Research Journal of Multidisciplinary Technovation pp 8-13; https://doi.org/10.54392/irjmt2242
This study proposes a model for calculating the optimum dry film thickness of corrosion protective Coatings. It was assumed that the graph of coating thickness against corrosion rate is a parabola whose coordinates at turning point consists of optimum thickness and minimum corrosion rate. On this basis, equation of parabola was formed. Three equations of parabola were also formed with three assumed thicknesses, taking arbitrarily with their corresponding corrosion rates of the coated metals. From the equations, a 3x3 matrix was derived. From the solution of the matrix, equations for optimum thickness, minimum corrosion rates and corrosion rate of uncoated specimen were obtained. It is assumed that with this model a technical ground shall be established, upon which the optimum thicknesses of corrosion protective coatings shall be recommended.
Published: 15 June 2022
International Research Journal of Multidisciplinary Technovation pp 1-7; https://doi.org/10.54392/irjmt2241
As 3D printing emerging to be a much-matured technology, its range of uses are now seemed to be infinite. 3D printing is now beyond the stage where it was only observed as a prototyping solution. From a simple artwork and playing toys to ready to live in buildings and also transplantable organs, the technology could potentially last until our imaginations die. From automobile to consumer goods manufacturing industries, organizations across various industries are trying to observe the advantages 3D printing has got to offer for production. With such acknowledgements, organizations are now trying to find their ways to incorporate this technology in their respective industries, whose applications could potentially extend from tooling to spare/replacement parts and sometimes till a full-fledged end-use ready product. While 3D printing looks like a most exciting new normal for organizations who are planning to streamline their prototyping technology, its prospects for the non-tech consumer world is also evolving rapidly. Additive Manufacturing in construction can be seen as an option that could contribute towards complete automation in the infrastructure industry. The method offers advantages in the aspects of design, sustainability and also efficiency. This work scopes for a comprehensive approach to advance the technology in construction and proposes research potentials, challenges, and future scope. The potential of 3dcp for automation advances all other practices in prospects like exclusion of form work, precise design execution, waste reduction and extremely low consumption of time. The real-time status and futuristic approaches to be adopted are briefed in the paper and also the scope for sustainability over other practices are detailed in the paper.