Wszystkie pola: Ramesh, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Hydrophilic Modified clay Nanocomposites: Effect of clay on Thermal and Vibrational Properties
Autorzy:: Kishore, A.
Venkatesh, D. B.
Kumar, M. A.
Ramesh, A.
Murthy, K. N.
Karthikeyan, N.
Powiązania:: https://bibliotekanauki.pl/articles/411937.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Hydrophilic nanoclay
Epoxy Nanocomposites
mechanical properties
Opis:: Epoxy (LY-556/HY-951) system filled with modified clay (MC) was synthesized by using mechanical shear mixing with the addition of hardener as tri-ethylene-tetra-amine (TETA). The effect of the fumed silica can be negated by the application of a shear force (e.g. mixing, brushing, spraying etc), allowing the liquid to flow, level out and permit the escape of entrapped air. The reinforcement effects of MC in the epoxy polymer on thermal, mechanical and vibration properties were studied. Curing study shows that the addition MC does not show any effect in the curing behavior of epoxy polymer. Thermogravimetry analysis (TGA) shows enhanced thermal stability for epoxy with MC fillers. The epoxy with MC fillers shows considerable improvement on tensile and impact properties over pure epoxy polymer. SEM studies shows that addition of clay significantly turns the epoxy system from brittle to ductile nature was played instrumental in scaling performance. The improvement in tensile and impact properties of nanocomposites is supported with the fracture surface studies. Epoxy with MC fillers shows enhanced vibration characteristics than that of the pure epoxy polymer. FTIR studies indicated the formation of C-H bonds on the surface of the nanocomposites.
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2014, 8; 73-86
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The effect of fiber length on tensile properties of polyester resin composites reinforced by the fibers of Sansevieria trifasciata
Autorzy:: Hari Sankar, P.
Hemacahndra Reddy, K.
Mohana Reddy, Y.V.
Ashok Kumar, M.
Ramesh, A.
Powiązania:: https://bibliotekanauki.pl/articles/11876.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: fibre length
tensile property
polyester composite
resin
fibre
Sansevieria trifasciata
polyester
mechanical property
Opis:: This paper presents the study of the tensile properties of Sansevieria trifasciata – fiber (here after called STF) reinforced polyester composites. The composite sample was fabricated with five different fiber lengths of STF (2, 4, 6, 8 and 10 mm). The fabrication was made by hand lay-up technique. Mechanical properties were determined using tensile testing. An interact between fiber and matrix was observed from the SEM (scanning electron microscope) micrographs. The study reveals that the tensile strength increased with fiber length without effecting the elongation at break of the composite.
Źródło:: International Letters of Natural Sciences; 2014, 03
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Development of urban green belts-a super future for ecological balance, Gulbarga city, Karnataka
Autorzy:: Ramesh, R.M.
Nijagunappa, R.
Powiązania:: https://bibliotekanauki.pl/articles/10970.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:: Green belt land is an open space around bigger cities. The main purpose of the green belt is to protect the land from urban sprawl, and maintain the designated area for forestry, agriculture as well as to provide habitat to wildlife. Green belt offers a number of benefits for population. Areas that are designated as green belt must not be built upon, however, that does not mean that no buildings can be erected in green belt. GREENBELT is a policy and land use designation used in land use/land cover planning. Green belt policy may not work well in all areas and has been a subject of criticism; however, its advantages by far outweigh its disadvantages. The Green belt land covers about 2% of total geographical area in Gulbarga city of Karnataka state. They do not solve the problem related to low forest cover in the Gulbarga District but they significantly improve air quality and help combat a number of environmental problems. During the data collection (43%) of respondents both knew that Green Belts surround city, and valued Green Belts as places to enjoy quiet recreation It is confirmed that Green Belt policy has been highly effective in eco-friendship relation. Green Belts have a role to play in achieving positive land use objectives. The concept of Green Belt also has strong support amongst the general public, even if they do not always understand the full details of the planning policy. These areas could take on an even greater significance in the face of climate.
Źródło:: International Letters of Natural Sciences; 2014, 22
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Study on Solving Drinking Water Problems of a Household in Coastal regions of Odisha, India
Autorzy:: Mohapatra, Ramesh Chandra
Powiązania:: https://bibliotekanauki.pl/articles/1062896.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Atmospheric Water Generator
Dehumidifier unit
Desalination
Relative humidity
Opis:: Though water covers more than two-third (about 70%) of the earth’s surface, still fresh water used for drinking purposes remains scarce (only about 2.5%). This is mainly due to presence of long coastlines & island nations. As a result most of the countries meet their water demands by desalination of sea water which is a very costly affair. In India, the state like Odisha has a long coastline. Till now Odisha has not developed a method from which water from sea can be used to provide drinking water to the people. The aim of this present work is to develop a portable device that can be used to meet the water requirement of a regular household. The device will first condense the water present in the atmosphere & then purify it so that it can be used for drinking. Such a device is called Atmospheric Water Generator. From this work, it was found that if the ambient temperature is 35 ºC or higher & if the relative humidity is greater than 50% then the device will function well & it will start condensing water. Thus in order to work the device in coastal areas of Odisha metrological datas are collected from internet for major coastal cities of Odisha and found that the relative humidity of coastal cities in Odisha remains above 50% throughout the year. Hence the developed device will work round the year without any problem.
Źródło:: World Scientific News; 2019, 127, 3; 311-324
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Design and development of smokeless stove for a sustainable growth
Autorzy:: Nayak, Ramesh Chandra
Roul, Manmatha K.
Roul, Prateek Debadarsi
Powiązania:: https://bibliotekanauki.pl/articles/2091365.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: combustion
efficiency
calorific value
air pollution
stove
fuel
superheater
Opis:: Air pollution has a serious impact on the health of human beings and is a major cause of death worldwide every year. Out of the many sources of air pollution, the smoke generated from household combustion devices is very dangerous due to the incomplete combustion of fuel. Women from rural areas suffer a lot due to this harmful smoke. Diseases like cancer, throat, and lung infection occur in adults and children due to inhalation of this smoke. The traditional chulha used by rural women is operated by using cow dung, straw, and wood, and the air is blown manually by using small metallic pipes. This paper presents the design and development of an innovative stove to maximize flame temperature and minimize air pollution to overcome the health-related issues of rural women. A smokeless stove is presented, in which wood, straw, and cow dung are taken as primary fuel, and superheated steam as a secondary oxidizer for its operation. In this stove, a forced draft is created by the provision of a small fan, which is operated by solar power thus eliminating the need of creating a forced draft manually by the cook which makes this innovative stove superior to the traditional chulha. Owing to the provision of superheated steam, the flame temperature as well as the burning efficiency increases. The cooking time is reduced due to higher flame temperature as compared to the liquefied petroleum gas stove. The main objective of this work is to minimize air pollution and provide a smoke-free environment to the people using such devices as this innovative stove offers complete combustion of fuel. The flame temperature of the designed stove ranges from 595°C to 700°C and its thermal efficiency is 10–17% higher than that of the traditional chulha. The design of this stove is unique, and its maintenance cost is also much less.
Źródło:: Archives of Thermodynamics; 2022, 43, 1; 109--125
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Development of a Composite Propellant Formulation with a High Performance Index Using a Pressure Casting Technique
Autorzy:: Ramesh, K.
Jawalkar, S. N.
Sachdeva, S.
Bhattacharya, B.
Powiązania:: https://bibliotekanauki.pl/articles/358322.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: composite propellant
high density
high performance index
pressure casting
solid loading
Opis:: There is a continuous demand for high performance composite propellant formulations to meet future requirements. The performance of composite propellant formulations can be enhanced by the addition of energetic oxidizers, like ADN/HNF as well as an energetic binder & a plasticizer. However, on incorporation of energetic ingredients, the composition becomes sensitive, and thus processing, handling and transportation pose a greater threat. Therefore, a moderately high burn rate composition having a burn rate ~ 13-14 mmźs -1 at 7000 kPa was tailored by increasing the solid loading of the propellant from 85.15% to 87.27% with the help of ammonium perchlorate and process aids without affecting the burn rate and mechanical properties. The tailored composition was studied for different properties such as end of mix viscosity, density, mechanical & ballistic properties. The evaluated data reveal that the end of mix viscosity of the tailored composition is higher than the base composition, i.e., 672 Paźs and 2340 Paźs at the same temperature; however, this viscosity was castable using a pressure casting technique. The properties of the cured propellant reveal that there is an enhancement of density from 1.74 gźcm -3 to 1.79 gźcm -3 with no other changes in mechanical properties. The performance index of the tailored composition has been increased from 416 to 437, well supported by results of ballistic evaluation motors of 2 kg.
Źródło:: Central European Journal of Energetic Materials; 2012, 9, 1; 49-58
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Power system oscillation damping controller design: a novel approach of integrated HHO-PSO algorithm
Autorzy:: Devarapalli, Ramesh
Kumar, Vikash
Powiązania:: https://bibliotekanauki.pl/articles/1845539.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Harris hawk optimization
power system stabilizers
STATCOM
FACTS
particle swarm optimization
Opis:: The hybridization of a recently suggested Harris hawk’s optimizer (HHO) with the traditional particle swarm optimization (PSO) has been proposed in this paper. The velocity function update in each iteration of the PSO technique has been adopted to avoid being trapped into local search space with HHO. The performance of the proposed Integrated HHO-PSO (IHHOPSO) is evaluated using 23 benchmark functions and compared with the novel algorithms and hybrid versions of the neighbouring standard algorithms. Statistical analysis with the proposed algorithm is presented, and the effectiveness is shown in the comparison of grey wolf optimization (GWO), Harris hawks optimizer (HHO), barnacles matting optimization (BMO) and hybrid GWO-PSO algorithms. The comparison in convergence characters with the considered set of optimization methods also presented along with the boxplot. The proposed algorithm is further validated via an emerging engineering case study of controller parameter tuning of power system stability enhancement problem. The considered case study tunes the parameters of STATCOM and power system stabilizers (PSS) connected in a sample power network with the proposed IHHOPSO algorithm. A multi-objective function has been considered and different operating conditions has been investigated in this papers which recommends proposed algorithm in an effective damping of power network oscillations.
Źródło:: Archives of Control Sciences; 2021, 31, 3; 553-591
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Power system oscillation damping controller design: a novel approach of integrated HHO-PSO algorithm
Autorzy:: Devarapalli, Ramesh
Kumar, Vikash
Powiązania:: https://bibliotekanauki.pl/articles/1845528.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Harris hawk optimization
power system stabilizers
STATCOM
FACTS
particle swarm optimization
Opis:: The hybridization of a recently suggested Harris hawk’s optimizer (HHO) with the traditional particle swarm optimization (PSO) has been proposed in this paper. The velocity function update in each iteration of the PSO technique has been adopted to avoid being trapped into local search space with HHO. The performance of the proposed Integrated HHO-PSO (IHHOPSO) is evaluated using 23 benchmark functions and compared with the novel algorithms and hybrid versions of the neighbouring standard algorithms. Statistical analysis with the proposed algorithm is presented, and the effectiveness is shown in the comparison of grey wolf optimization (GWO), Harris hawks optimizer (HHO), barnacles matting optimization (BMO) and hybrid GWO-PSO algorithms. The comparison in convergence characters with the considered set of optimization methods also presented along with the boxplot. The proposed algorithm is further validated via an emerging engineering case study of controller parameter tuning of power system stability enhancement problem. The considered case study tunes the parameters of STATCOM and power system stabilizers (PSS) connected in a sample power network with the proposed IHHOPSO algorithm. A multi-objective function has been considered and different operating conditions has been investigated in this papers which recommends proposed algorithm in an effective damping of power network oscillations.
Źródło:: Archives of Control Sciences; 2021, 31, 3; 553-591
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: A non-singular analytical technique for reinforced noncircular holes in orthotropic laminate
Autorzy:: Mohan, Pradeep
Kumar, R. Ramesh
Powiązania:: https://bibliotekanauki.pl/articles/266144.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: współczynnik naprężeń
analiza elementu skończonego
naprężenia
power series
stress ratio
non-circular hole
Opis:: The intricacy in Lekhnitskii’s available single power series solution for stress distribution around hole Edg for both circular and noncircular holes represented by a hole shape parameter ε is decoupled by introducing a new technique. Unknown coefficients in the power series in ε are solved by an iterative technique. Full field stress distribution is obtained by following an available method on Fourier solution. The present analytical solution for reinforced square hole in an orthotropic infinite plate is derived by completely eliminating stress singularity that depends on the concept of stress ratio. The region of validity of the present analytical solution on reinforcement area is arrived at based on a comparison with the finite element analysis. The present study will also be useful for deriving analytical solution for orthotropic shell with reinforced noncircular holes.
Źródło:: International Journal of Applied Mechanics and Engineering; 2020, 25, 1; 92-105
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Design of a Microstrip Filtering Antenna for 4G and 5G Wireless Networks
Autorzy:: Boddu, Ramesh
Deb, Arindam
Roy, Jibendu Sekhar
Powiązania:: https://bibliotekanauki.pl/articles/24200731.pdf
Data publikacji:: 2023
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: elliptical microstrip patch antenna
ﬁltering antenna
hairpin bandpass ﬁlter
Opis:: The ﬁltering antenna provides both radiation and ﬁltering features and is an important component for the RF front-end of wireless devices. The main function of a ﬁltering antenna is to reject out-of-band signals, thus reducing the interference from adjacent channels. The aim of the present work is to design a 2.6 GHz microstrip ﬁltering antenna for 4G and 5G global mobile services. The ﬁltering antenna is designed using a hairpin bandpass ﬁlter integrated with an elliptical microstrip aerial. Good impedance matching is obtained by using appropriate dimensions of the hairpin bandpass ﬁlter. The 10 dB return loss bandwidth of the ﬁltering antenna is approx. 5.7%, with the maximum gain for the elliptical ﬁltering antenna of approx. 2.2 dB. Good agreements between the measured and simulated results are obtained for the proposed ﬁltering antenna and the bandwidth covers almost the entire 2.6 GHz band.
Źródło:: Journal of Telecommunications and Information Technology; 2023, 2; 78--83
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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