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Wyszukujesz frazę "Ramesh, K." wg kryterium: Autor

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    Wyświetlanie 1-12 z 12
    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
    Artykuł
    Tytuł:
    $\text{}^{35}Cl$ NQR Study of Cation Polarizability in Metal Salts of Monochloro Acetic Acid
    Autorzy:
    Ramananda, D.
    Ramu, L.
    Chandramani, R.
    Ramesh, K.
    Uchil, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812357.pdf
    Data publikacji:
    2008-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.60.Gv
    Opis:
    Various metal salts (Na, K, Rb, and $NH_4$) of monochloro acetic acid were prepared and the $\text{}^{35}Cl$ nuclear quadrupole resonance frequencies were measured at room temperature. A comparative study of nuclear quadrupole resonance frequencies of monochloro acetic acid and its metal salts is carried out. The frequency shifts obtained in the respective metal chloroacetates are used to estimate the changes in the ionicity of C-Cl bond. Further, the changes in the ionicity of C-Cl bond were used to estimate the percentage of intra-molecular charge transfer between respective cation-anion of the metal salts of chloro acetic acid. The nuclear quadrupole resonance frequency is found to decrease with increasing ionicity of the alkali metal ion.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 6; 1679-1685
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal analysis of generalized Burgers nanofluid over a stretching sheet with nonlinear radiation and non uniform heat source/sink
    Autorzy:
    Kumar, K. G.
    Ramesh, G. K.
    Gireesha, B. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/240767.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    burgers nanofluid
    non-uniform heat source/sink
    non-linear radiation
    magnetic field
    stretching surface
    pole magnetyczne
    powierzchnia
    rozciąganie
    promieniowanie
    nanofluid
    Opis:
    The work deals with the heat analysis of generalized Burgers nanofluid over a stretching sheet. The Rosseland approximation is used to model the non-linear thermal radiation and incorporated non-uniform heat source/sink effect. The governing equations reduced to a set of nonlinear ordinary differential equations under considering the suitable similarity transformations. The obtained ordinary differential equations equations are solved numerically by Runge-Kutta-Fehlberg order method. The effect of important parameters on velocity, temperature and concentration distributions are analyzed and discussed through the graphs. It reveals that temperature increases with the increase of radiation and heat source/sink parameter.
    Źródło:
    Archives of Thermodynamics; 2018, 39, 2; 97-122
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mass transfer analysis of two-phase flow in a suspension of microorganisms
    Autorzy:
    Mamatha, S.U.
    Ramesh, Babu, K.
    Durga Prasad, Putta
    Raju, C.S.K.
    Varma, S.V.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/240799.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gyrotactic microorganisms
    dusty fluid
    mass transfer
    stretching sheet
    bio convection
    boundary layer flow
    Opis:
    The aim of present work is to investigate the mass transfer of steady incompressible hydromagnetic fluid near the stagnation point with deferment of dust particles over a stretching surface. Most researchers tried to improve the mass transfer by inclusion of cross-diffusion or dust particles due to their vast applications in industrial processes, extrusion process, chemical processing, manufacturing of various types of liquid drinks and in various engineering treatments. To encourage the mass transport phenomena in this study we incorporated dust with microorganisms. Conservation of mass, momentum, concentration and density of microorganisms are used in relevant flow equations. The arising system of nonlinear partial differential equations is transformed into nonlinear ordinary differential equations. The numerical solutions are obtained by the Runge-Kutta based shooting technique and the local Sherwood number is computed for various values of the physical governing parameters (Lewis number, Peclet number, Eckert number). An important finding of present work is that larger values of these parameters encourage the mass transfer rate, and the motile organisms density profiles are augmented with the larger values of fluid particle interaction parameter with reference to bioconvection, bioconvection Lewis number, and dust particle concentration parameter..
    Źródło:
    Archives of Thermodynamics; 2020, 41, 1; 175-192
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urbanization impact on avifauna population and its status in Gulbarga city, Karnataka, India
    Autorzy:
    Ramesh, M.
    Nijagunappa, R.
    Manjunath, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/11562.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    The avifauna of Gulbarga city was studied for a period of one year. Gulbarga city has got one reservoirs in the heart of the city, the Shree Sharnabasveshwar Lake. The city has well protected by greenery, Gulbarga University Campus, Kapnoor (Industrial area). During the study of three different transects lines, 30 plants species and 42 birds species were observed, in which 35 are resident species, 6 winter migrant and 1 summer migrant respectively. Highest population of Cattle Egret (Bubulcus ibis) and Blue Rock Pigeon (Columba livia) was recorded in this study. The visitors include White-necked stork (Ciconia episcopus), Yellow Wagtail (Motacilla flava) which are found in the study area. According to status of birds maximum (average) numbers of birds were found in highly urbanized area when compared to industrial area, but species wise variation was high in low urbanized compared to that of highly urbanized area.
    Źródło:
    International Letters of Natural Sciences; 2014, 21
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and validation of RP-HPLC method for the determination of doxycycline hyclate in spiked human urine and pharmaceuticals
    Autorzy:
    Ramesh, P.J.
    Basavaiah, K.
    Tharpa, K.
    Vinay, K.B.
    Revanasiddappa, H.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/3655.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2010, 04, 2
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Development of a Method to Compute the Overall Key Performance Index for a Spinning Mill to Aid Supply Chain Management
    Opracowanie metody obliczania ogólnego kluczowego wskaźnika wydajności dla przędzalni w celu wspomagania zarządzania łańcuchem dostaw
    Autorzy:
    Anand, K. T.
    Rajan, A. John
    Bapu, B. R. Ramesh
    Powiązania:
    https://bibliotekanauki.pl/articles/232949.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    key performance index
    overall KPI
    kluczowe wskaźniki wydajności
    KPI
    Opis:
    This paper aims to provide a convenient measure of evaluating the performance of spinning mills using the overall Key Performance Index. Although many authors have advocated the concept of the key performance index, their studies were confined to departments other than spinning. The methodology followed in this paper is based on providing weightages to machine utilisation, spindle production, end breaks, HOK (number of operative hours required to produce 100 kg of yarn), roving production, yarn realisation, CSP (count strength product), units/kg of yarn and to compute the overall Key Performance Index in a logical manner. It has come to light that some mills have achieved an overall Key Performance Index (OKPI) of more than 100 and less than 100 in certain other mills. Also the important factors which are significant for supply chain management have been highlighted. A very useful source of information and advice for various spinning mills to develop their own supply chain strategies is provided. Especially with the introduction of technical textiles, supply chain management has become a critical area.
    Celem artykułu było zapewnienie wygodnej miary oceny wydajności przędzalni przy użyciu ogólnego kluczowego wskaźnika wydajności. Chociaż w wielu opublikowanych pracach opowiadano się za koncepcją kluczowego wskaźnika wydajności, dotychczasowe badania ograniczały się do innych działów niż przędzalnictwo. Metodologia zastosowana w artykule opiera się na zapewnieniu wag użytkowania maszyny, produkcji wrzeciona, przerw końcowych, HOK (liczba godzin operacyjnych potrzebnych do wyprodukowania 100 kg przędzy), produkcji niedoprzędów, realizacji przędzy, CSP (iloczyn wytrzymałościowy), jednostek/kg przędzy. W pracy podkreślono czynniki istotne dla zarządzania łańcuchem dostaw. Artykuł może stanowić bardzo przydatne źródło informacji i porad dla różnych przędzalni w celu opracowania własnych strategii łańcucha dostaw, szczególnie biorąc pod uwagę fakt, że zarządzanie łańcuchem dostaw stało się krytycznym obszarem, zwłaszcza po wprowadzeniu tkanin technicznych.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2019, 6 (138); 20-26
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Serodiagnosis of Toxoplasmosis using Lateral Flow Chromatographic Immunoassay among Animals and Humans in Sunsari District of Nepal
    Autorzy:
    Sah, Ramesh Prasad
    Talukder, Md Hasanuzzaman
    Rahman, A. K. M. Anisur
    Powiązania:
    https://bibliotekanauki.pl/articles/1167051.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Animals
    Nepal
    human
    seroprevalence
    toxoplasmosis
    Opis:
    Toxoplasmosis is a cosmopolitan parasitic zoonosis, infecting human and other warm blooded animals worldwide. This disease has economic importance in regard to animal reproduction, and it leads to abortions and neonatal complications in humans. This study was carried out to determine the seroprevalence of Toxoplasma gondii in sheep, cattle, cats and human in Inaruwa and surrounding areas of Sunsari district, Nepal. Altogether 336 blood samples, of which 50 from sheep, 92 from cattle, 44 from cats and 150 from human were collected and tested immediately using lateral flow chromatographic immunoassay (Toxo IgG/IgM Combo Rapid test®). Associated biometric information such as age, sex, pregnancy status, occupation, association with cat was recorded and analyzed to determine the association of risk factors with the disease. Data were analyzed using R 3.2.2 (The R foundation for Statistical Computing, 2015). Seroprevalence of toxoplasmosis was detected 12.00% (95% CI: 4.53- 24.31%) in sheep, 8.70% (95% CI: 3.83- 16.42%) in cattle, 36.36% (95%CI: 22.41- 52.23%) in cats and 12.67% (95% CI: 7.80- 19.07%) in human. In case of human, 31 to 45 years age group were found more susceptible to toxoplasmosis (21.74%, OR: 6.4) in comparison to 21 to 30 years (10.0%) and up to 20 years (4.17%) age groups. Toxoplasmosis was found highly significantly associated with abortion (58.33%, OR= 15.4, P=0.0001) in human in the tested individuals. Regarding occupation, 20.83% butchers were seropositive followed by farmers (15.52%), housewives (10.0%) and diagnostic lab technicians (8.0%). Female and higher age group showed high prevalence of toxoplasmosis in all studied species. Therefore, this assay is a useful method for the serological screening of toxoplasmosis in different animals and humans.
    Źródło:
    World Scientific News; 2018, 105; 145-156
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Determination of tramadol hydrochloride and its preparations by acid-base titration in non-aqueous medium
    Autorzy:
    Vinay, K.B.
    Revanasiddappa, H.D.
    Rajendraprasad, N.
    Raghu, M.S.
    Ramesh, P.J.
    Xavier, C.M.
    Basavaiah, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/3614.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    determination
    tramadol hydrochloride
    preparation
    acid-base titration
    non-aquatic medium
    titrimetry
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2010, 04, 1
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
      Wyświetlanie 1-12 z 12

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