iosr-JMCE   Volume-19 ~ Issue-6 ~ Nov. – Dec. 2022

Abstract: Background: Bio-composite materials are being developed in research to obtain superior mechanical characteristics, this is because more and more industries are realizing the benefits that can be obtained. The aim of this research is to understand the addition of particles and carbon fiber, to increase the strength and strength of bio-composite materials. The material is a bio-composite material from water hyacinth fiber and jute fiber which has been widely used, but only for simple needs. To get maximum strength, the....

Keywords: Bio-composite, tensile-test, water hyacinth, jute, carbon

[1]. Ni Komang Ayu Melda Gayatri, Jurnal Kertha Semaya, Vol. 9 No. 3 Tahun 2021, hlm. 533-541, https://ojs.unud.ac.id/index.php /kerthasemaya/article/view/64371/38560
[2]. Ono Suparno, The Potency and Future Of Indonesia's Natural Fibres As Raw Materials For Various Industries, Jurnal Teknologi Industri Pertanian 30 (2): 221-227 (2020) DOI:https://doi.org/10.24961
[3]. Seyed Mostafa Mousavinasab, Metal, Ceramic and Polymeric Composites for Various Uses, IntechOpen Limited, July 20th, 2011, DOI: 10.5772/21405
[4]. Vasile Gheorghe, et. al., New Design of Composite Structures Used in Automotive Engineering, Symmetry 2021, 13, 383. https://doi.org/10.3390/sym13030383
[5]. Štefan Kender, et.all., Advantages of using composite materials in automotive manufacture process, INTERNATIONAL SCIENTIFIC JOURNAL "TRANS & MOTAUTO WORLD",WEB ISSN 2534-8493.

Abstract: Flat concrete tile is a good item for roof covering. Meanwhile, in the Lumajang area, there is many of iron sand, which comes from Semeru mountain. This iron sand has great traction as it is one of the ingredients used to make concrete tile. This research method uses an experimental research method. This research aims to know the effect of iron sand on the strength of the concrete tile. The composition of concrete tile is 30% iron sand, 30% rock sand, 20% cement, and 20% fly ash, and the materials for making the flat concrete roof tile. Besides that, in comparing the flat concrete roof tile, is made from mixed iron sand with regular river sand. The test of concrete roof tile comparison.....

Key Word: Lumajang iron sand, flat concrete roof tile,permeability, tensile strength, water absorption

[1] The Center for Settlement Research and Development. 1985. PersyaratanUmumBahanBangunan di Indonesia (PUBI), 2nd Edition. Bandung: The Foundation of the Investigation Institute of Building Problems.
[2] National Standardization Agency. 2007. SNI 0096: 2007, Genteng Beton ICS 91.100.30. Jakarta: National Standardization Agency.
[3] Mira Setiawati. 2018. Fly Ash SebagaiBahanPengganti Semen Pada Beton. National Seminar on Science and Technology, 17th October 2018, Jakarta: Faculty of Engineering, University of Muhammadiyah Jakarta.
[4] Roni Adi Wijaya, SeptiWijayanti&YayukAstuti. 2021. Fly Ash LimbahPembakaran Batubara SebagaiZat Mineral Tambahan (Additive) untukPerbaikanKualitas Dan KuatTekan Semen. Communication Media of Civil Engineering, Volume 27, No.1, 2021, p. 127-134.
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Abstract: The article looks at the current situation of the fuel and energy sector in Mongolia from the point of view of providing heat to consumers and focuses on further improvements. In the context of our country, the problem of heat supply is one of the most important problems facing the energy sector and we need to develop a methodology to address this issue as an thermal energy system(comprehensive heat supplying systems of energy sector). Therefore, it is important to approach the study of an object by the method of the general and mathematical systems theory, shortly named in this article systems analysis.This will be improve the thermal energy sector and, in particular, the subsystems of sources, networks and consumers, which are elements that make up the heat supply economyin.....

Key Word: Primary energy resource, thermal energy, heat sources, networks, ecology, transport infrastructure

[1]. P.Tovuudorj. Energy Security Indicators of Mongolia /"Strategic Research" magazine (seminar articles on the "Energy System Security and Economic Growth"). Ulaanbaatar, Academy of Strategies. 2020, December, №03, P.21-40.
[2] Pipeline energy systems: mathematical and computer modeling. / Novitsky N.N., Sukharev M.G., Sardanashvili S.A., et al. Novosibirsk: Nauka, 2014. 274 p.
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[4]. https://brstu.ru/static/unit/journal_smt/docs/number 14/64-70. pdf..

Abstract: Estimation of crop water requirement is necessary in the purpose of irrigation scheduling and optimal use in water management. In this study crop water requirements and irrigation scheduling of kharif season is estimated for the command area of Mallour distributary in Ambala at Haryana. Paddy and wheat are the major crops in the study area of Ambala region. The duration of paddy crop is 120 days. The cropwat model was developed by the Food and Agriculture Organisation (FAO) is used for calculating the crop water requirement (CWR) and scheduling of irrigation. Meteorological data from 1981 to 2019 were obtained from the Nasa Power Generation and soil data were obtained from the FAO 56 paper. The rainfall characteristics is estimated with climatological data and it is observed that the average annual precipitation is almost 773.56 mm where the total rainfall was 630 mm......

[1]. O. Moseki, M. Murray-Hudson, and K. Kashe, "Crop water and irrigation requirements of Jatrophacurcas L. in semi-arid conditions of Botswana: applying the CROPWAT model," Agric. Water Manag., vol. 225, Nov. 2019, doi: 10.1016/j.agwat.2019.105754.
[2]. R. Kumar, R. Nissa, and M. Kumar, "Moisture dynamics and irrigation modelling in apple (Malusdomestica) trees using CROPWAT model in temperate region of India," Indian J. Agric. Sci., vol. 88, no. 9, pp. 1449–1454, 2018.
[3]. U. Surendran, C. M. Sushanth, E. J. Joseph, N. Al-Ansari, and Z. M. Yaseen, "FAO CROPWAT model-based irrigation requirements for coconut to improve crop and water productivity in Kerala, India," Sustain., vol. 11, no. 18, pp. 1–15, 2019, doi: 10.3390/su11185132.
[4]. S. J. Kadbhane and V. L. Manekar, "Evaluation of water requirement of grape crop using CROPWAT model in Nashikdistrict , India," no. December, pp. 17–19, 2015.
[5]. U. Surendran, C. M. Sushanth, G. Mammen, and E. J. Joseph, "Modelling the Crop Water Requirement Using FAO-CROPWAT and Assessment of Water Resources for Sustainable Water Resource Management: A Case Study in Palakkad District of Humid Tropical Kerala, India," Aquat.Procedia, vol. 4, no.Icwrcoe, pp. 1211–1219, 2015, doi: 10.1016/j.aqpro.2015.02.154.

Abstract: Aluminum alloys are used in various sectors of the industry, due to their excellent combination strength and ductility, high strength/ weight ratio, corrosion resistance, fatigue resistance, and high fracture toughness, among others. But not all aluminum alloys present this set of properties simultaneously. The desired properties in service conditions are achieved through many factors, such as the chemical composition, the manufacturing method, plastic deformation and, above all, the thermal treatments, which allow strong precipitation hardening.Butit should be noted that the so-called "aging" heat treatments are only applicable to certain series of aluminum alloys, such as: 2xxx, 6xxx, 7000xxx and 9xxx.When the precipitation hardening treatment is applied, the precipitated particles must be coherent and coplanar with the matrix.On the other hand, to achieve precipitation hardening......

Key Word: Aluminium alloys, Aging treatment, Precipitation behavior, Coherent precipitates, GP zones

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Abstract: The present work investigates the influence of the fluid flow velocity and flow direction on the velocity of axisymmetric waves propagating in a hollow cylinder containing this fluid. In the context of this study, the motion of the cylinder is described by the exact equations and relations of linear elastodynamics, but the flow of the fluid is described by the linearized Euler equations for compressible barotropic inviscid fluids. Analytical expressions for the sought values containing unknown constants are obtained, and with the help of contact and of compatibility conditions, the system of homogeneous algebraic equations with respect to these unknown constants is....

Key Word: Cylinder containing flowing fluid, compressible inviscid barotropic fluid, hollow cylinder, axisymmetric waves dispersion, fluid flow, elastodynamics

[1]. Akbarov S.D., Sevdimaliyev Y.M. and Valiyev G.J. (2021), ―Mathematical modeling of the dynamics of a hydroelastic system—A hollow cylinder with inhomogeneous initial stresses and compressible fluid.‖ Math Meth Appl Sci.44(9): 7858 – 7872. https://doi.org/10.1002/mma.7329
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Abstract: The present project shows the analysis carried out in an ophthalmological lens manufacturer in order to reduce the cost of resin consumption in the manufacturing process, without affecting the lens with respect to its properties and the specifications established in the quality department. The study was carried out in the Coating Area, where machines are used to coat ophthalmic lenses with 1193 A1 resin, making them more resistant to bumps and scratches. This project was developed through the application of six sigma based on the DMAIC methodology which was used to identify the opportunity area that would allow saving in the percentage of resin consumption by 50% and generating annually savings of up to $ 90,000 USD.Based on the results obtained in the scratch tests (Bayer), adherence (Craze) and % solids, it is possible to modify the resin filler to 7% for the cover of ophthalmic lenses..

Key Word: Six sigma, optimization, continuous improvement, DMAIC, resin

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Abstract: Background: Green concrete, as an innovation in the concrete industry, is an option in manufacturing precast reinforced concrete beams (PRCB). The choice of material aims to reduce waste in nature and reduce the use of cement. This study aims to determine the feasibility of using Rice Husk Ash (RHA) to manufacture precast beams. Materials and Methods: Experimental methods with three variations of RHA presentation and three curing methods were applied to cylindrical and reinforced concrete beam samples. Testing the compressive strength and flexural strength of concrete.......

Key Word: Rice Husk Ash (RHA). Compressive strength, flexural strength

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[3]. S. Reichenbach and B. Kromoser, "State of practice of automation in precast concrete production‟, J. Build. Eng., vol. 43, p. 102527, 2021.
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