In this Study View Broadband and dual-band micro strip antenna for telecommunication systems, this paper construction of a broadband micro strip antenna for airborne telecommunication systems are described. Considered antenna represented modified broad-band antenna of butterfly-style. The electro-dynamic; the parameters and the basic characteristics of antenna are determinate, Currently widespread practical application got multiband and broadband radio systems. The technical characteristics of such systems are largely determined by characteristics of antenna-feeder devices. The paper presents a literature review of slotted microstrip patch antennas and studies the dual-frequency characteristics of microstrip antennas; two of all frequency microstrip antennas are dual-band.

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Journal: International Journal of Communications, Network and System Science, 2019

The constant growth of the number of Internet users places new demands on the bandwidth of modern communication. The World Wide Web has led to the emergence of various types of traffic, Graphics information, voice data, as well as various video applications demanding their special requirements for such networks. To meet all the requests, one increase of the network is not enough. As the number of Internet users and the various networks annex offices in-creases with each passing day, network needs a means of control that would ensure the support of both existing and new applications and services. There is still a need to address a number of issues before it announces the VoIP as the ultimate replacement of the traditional telephone network. This work provides an overview of the major benefits of VoIP network, as well as the presentation of a new way around the problem of ensuring the high quality of service for VoIP protocol on the basis of neural network model.

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Journal: Journal of Signal and Information Processing, 2017, 8, 195-202

This paper mainly studies data transmission Rate (DTR) in the of fuzzy logic in on Cognitive wireless modern communication improving the use of the radio frequency spectrum and the degree of intelligence of network and subscriber equipment, In this regard, The use of methods of cryptographic protection of information with a public key are convenient in that they do not require an additional communication channel for the exchange of a private key between the sender and the recipient However, they often rely on complex mathematical calculations and usually much less effective than c cryptosystems on a symmetric key. In this article we will focus on implementation of fuzzy logic methods for asymmetric encryption key. Fuzzy logic, in this case, is a problem solving methodology for data transfer that can find its application in various systems. In the present article deals with the encryption method using the theory of fuzzy sets technology of constructing cognitive wireless data transmission systems (WDTS) use of fuzzy logic and fuzzy controllers, Systems а demand of high quality transmission increasing of transmission data speed. The Methodology approaches: the following set of scientific and technical tasks were set and solved: -The study of the main directions of development of wireless systems and data networks. -Development of a model and method for fuzzy control of adaptive OFDM modulation. And method for fuzzy control of multiple accesses to WDTS for routing the fuzzy baseline data on the state of a radio a wireless network.

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Journal: International Journal of Electrical and Computer Engineering (IJECE) 2019

Various water budget elements such as water supply to the, ground water recharge, and change in storage are predicted by Water Budget Method for a period of 2.5 years. The predicted water budget elements are evaluated by UKM Meteorological station data. The results show that the modelling undertaken is on the flow of the water and calculation of the water balance for the constructed wetlands using the water budget equation in order to determine the potential underground water resources of the UKM Bangi, Campus. The modeling will be based on the known geology of the area from previous research and Water availability from the known sources, e.g. Engineering and Golf lakes, which are being used as alternative water sources for the Campus. The volume of water that can be held by the UKM aquifer is about 1.4 million m3 , which agrees with the estimate by JICA (2002) for the Langat river basin, that the recharging rate is 4.8% of the annual rainfall, from this study the recharging rate is 5% of the annual rainfall. The close approximation of the results for Langat Basin and UKM campus supports the contention that the UKM catchment is just a sub-catchment of the Langat River basin and should have similar properties.

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Journal: ICCBT 2008 - D - (17) - pp181-190

Various water budget elements such as water supply to the, ground water recharge, and change in storage are predicted byWater Budget Method for a period of 2.5 years. The predicted water budget elements are evaluated by UKMMeteorological station data. The results show that the modelling undertaken is on the flow of the water and calculation of the water balance for the constructed wetlands using the water budget equation in order to determine the potentialunderground water resources of the UKM Bangi, Campus. The modeling will be based on the known geology of the areafrom previous research and Water availability from the known sources, e.g. Engineering and Golf lakes, which are beingused as alternative water sources for the Campus. The volume of water that can be held by the UKM aquifer is about 1.4million m 3 , which agrees with the estimate by JICA (2002) for the Langat river basin, that the recharging rate is 4.8% of the annual rainfall, from this study the recharging rate is 5% of the annual rainfall. The close approximation of the resultsfor Langat Basin and UKM campus supports the contention that the UKM catchment is just a sub-catchment of the LangatRiver basin and should have similar properties

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Journal: ARPN Journal of Systems and Software, Volume 1 No. 3, JUNE 2011 ISSN 2222-9833

The potential for using fly ash as a supplementary cementing material in concrete has been known almost since the beginning of the previous century. Fly ash was used as a supplementary cementing material (SCM) in the production of Portland cement concrete. A supplementary cementing material, when used in conjunction with Portland cement, contributes to the properties of the hardened concrete through hydraulic or pozzolanic activity, or both. In this study, the fly ash and waste glass powder were used in concrete blocks to study the improvement of concrete in terms of workability and strength. Therefore, an experimental study will be conducted to measure the engineering properties of cured concrete. In this research, local raw material from Jaresh area was used.

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Journal: Open Journal of Civil Engineering, 2017, 7, 423-431

This study investigates the experimental laboratory work of concrete to determine the optimum amount of limestone powder to be used in concrete mixes. To handle this purpose 30 concrete cubes were prepared for testing to achieve a compressive strength of 25 MPa According: ASTM (211.1-81). The samples were classified into four different categories according to the ratio of the limestone powder that added to the specimens such as follow; 0%, 1%, 2%, 10% and 15% of cement ratio. For all tests, the cubes were left in curing until testing at the age of 3, 14 and 28 days respectively. The specimens were loaded to failure and the averages of compressive strength were used for comparison purposes. To measure the workability flow table test has been conducted on the fresh concrete directly. Results were compared to null limestone powder samples and revealed that the average compressive strength of samples with ratio 2% was increased by 5% and 9.5% at age 14 days and 28 days respectively. On the other hand, adding 15 % of limestone powder causes significant reduction of compressive strength 43% and 28% and age 14 days and 28 days respectively. The flow table tests revealed an increment in the workability of fresh concrete with 0% a, 1% and 2% of limestone powder used in concrete mixes. An ideal ratio of limestone powder is 2% was recommended in this research study.

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Journal: International Review of Basic and Applied Sciences Vol. 6 Issue.4

- Solid waste materials are one of the most significant environmental problems all over the world. Therefore in-order to avoid environmental pollution it is important to reuse these scrap tires. There for in this study experimental works have been done to evaluate the influence of adding tire rubber powder in concrete in terms of compressive strength and workability. The rubber powder were used to replace 0%, 1%,5%,15% and 25% of the total minerals of cement volume in concrete. Results revealed that the average compressive strength at age 28 days was decreased up to 10.9%, 13.31 %, 25.1%, 32.2%, 48.3% by adding rubber powder 1%, 5%, 15% and 25% respectively. So that adding rubber powder has significant effect of reducing the compressive strength. The slump test for sample without rubber is 90 mm, it was also observed that the slump is reduced by increasing the amount of rubber to the concrete, so that adding rubber 25% of cement gives slump of 73 mm. According to this study it was not recommended to use rubber powder as cementation material in concrete because it observed that adding more rubber results in decreasing the compressive strength of concrete and these phenomena is not preferable.

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Journal: International Journal of Innovative Science and Research Technology Volume 3, Issue 7, July – 2018

The steel, aluminum and copper waste from the factories has a negative effect on the environment. This study investigates the possible reuse of steel, aluminum and copper waste as a supplementary cementitious material and its effect on concrete properties. This paper proposes a model for the prediction of the compressive strength of cement concrete and mortar as the cement was replaced with steel, aluminum and copper waste with the following by weight percentages: 0%, 5%, 10%, and 15%.The tests performed in this paper are conducted to the following samples: (50 * 50 * 50 mm) mortar samples, (150 * 150 * 150 mm) concrete cubes, and (150 * 300 mm) concrete cylinders. Tests are performed at the periods of 7 and 28 days. The results show that the use of steel waste (Fe15%) increased compressive strength of concrete by 18.5% and copper waste by (Cu15%) increased it by 15.77%, aluminum (Al15%) increased it by 12.95% and steel waste (Fe15%) increases compressive strength of cement mortar by 9.55% as compared to pure mixing. Consequently, adding steel waste to concrete gives it a compressive strength of more than the double of its original strength.

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Journal: Modern Applied Science; Vol. 13, No. 4; 2019

An experimental study was carried out to investigate the performance of timber beams strengthened using fiber reinforced polymer and wire mesh. A series of ten timber beams with 200 × 125 mm rectangular cross section and 2000 mm long were tested up to failure under one-point load. The current study examined the effect of strengthened materials types, the thickness of the used sheets and strengthening configuration. The results showed that all of strengthening schemes investigated in this study were efficient in augmenting the load carrying capacity of timber beams but didn’t enhance their stiffness. Using welded wire mesh significantly enhanced the failure capacity and energy absorption capacity of the strengthened beams as compared to GFRP sheets.

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Journal: International Review of Basic and Applied Sciences Vol. 6 Issue.5