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Wyświetlanie 1-10 z 16
Tytuł:
Experimental Investigation of Process Parameters in Drilling LM25 Composites Coated with Multi Wall Carbon Nano Tubes Using Sonication Process
Autorzy:
Sangeetha, M.
Prakash, S.
Powiązania:
https://bibliotekanauki.pl/articles/352817.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
drilling
feed rate
Hybrid Metal Matrix Composites
response surface methodology
sonication
thrust force
Opis:
Aluminium based metal matrix composites are widely used in automobile components such as cardan shaft of Chevrolet corvette, disc brake and engine push rod. In this experiment a Hybrid Metal Matrix Composites (HMMC) are fabricated and drilled. Drilling is the process of making slots in disc brake and thread in the engine parts. The surface quality of the drilled specimen depends on the speed, feed, drill type and the thrust force. Thrust force plays the major role in drilling the specimen. In this experiment HMMCs are fabricated using two processes-called, sonication and casting. Sonication is the process of coating the carbon nanotubes over the silicon carbide particles (SiCp). Semisolid stir casting is used to reinforce the coated SiCp in the LM 25 alloy. A drilling process is performed on HMMC to analyse the extent to which the input parameters influence the thrust force and Ovality. The tools used for drilling are solid carbide tools of three different diameters. Taguchi’s experimental design is adopted for the drilling operation. A mathematical model is used to determine the influence of input parameters on the outputs thrust force and ovality. This paper proves the combination of N3 , f1 and d1 of the carbide tool results in the lowest value of thrust force and ovality while drilling HMMCs. In this work the HMMC is prepared by coating the abrasive nature, silicon carbide particle and there is a good interfacial bonding between the reinforced particle and matrix and the drilling process becomes smoother. The new being of this article is the treated ceramics, SiCp with carbon nanotubes. This HMMC shows the improved mechanical properties compared to other metal matrix composites surveyed in the literatures.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1761-1770
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Mechanical and Electrical Properties of Spark Plasma Sintered Titanium Carbide Reinforced Alumina Ceramic Composite
Autorzy:
Selvakumar, G.
Prakash, S. Ram
Rajkumar, K.
Powiązania:
https://bibliotekanauki.pl/articles/2049356.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Spark Plasma Sintering
alumina composite
TiC
mechanical properties
fracture toughness
Opis:
Spark Plasma Sintering (SPS) is identified as a suitable technique to prepare the alumina titanium carbide composite to overcome the difficulty in fabricating it through other consolidation method. The present work focuses on the fabrication and characterization of a series of titanium carbide reinforced alumina ceramic composites using a spark plasma sintering process. The titanium carbide reinforcement on the alumina matrix is varied between 20 and 35 wt.%, in order to improve the electrical conductivity and fracture toughness of the composites. The particle size of the starting powders at received and ball milled conditions was analysed through Particle size analyser and Scanning Electron Microscope (SEM). Microstructural analysis revealed that the TiC reinforcement is uniformly dispersed in the sintered composite. XRD report showed that α-alumina and titanium carbide were the two dominant phases without the formation of any reaction phases. Further, the correlation between mechanical and physical properties of the prepared composite was investigated as a function of TiC. Various fracture toughening indicators like crack deflection, bridging and branching were analysed by Vicker’s indentation method. Electrical resistivity of the sintered compact decreases proportionally with the increase in titanium carbide constituents. Maximum density (98.80%) and hardness (20.56 GPa) was obtained for 30 wt. % reinforced composite. Almost 40% improvement in fracture toughness is noted for 25 wt. % reinforced composite. This work demonstrates the synthesis and fabrication of alumina titanium carbide composites at low temperature via SPS resulted in obtaining an intact compact with improved mechanical and electrical properties.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 831-838
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Social Media Disengagement Among Gen Y and Gen Z: a Quantitative Investigation
Autorzy:
Chellasamy, Aarthy
Almeida, Shaeril Micheal
Prakash, G S
Nagarathinam, Aishwarya
Rangasamy, Sangeetha
Powiązania:
https://bibliotekanauki.pl/articles/2150834.pdf
Data publikacji:
2022
Wydawca:
Univerzita sv. Cyrila a Metoda. Fakulta masmediálnej komunikácie
Tematy:
Credibility
Digital Natives
Social Media Disengagement
Social Media Experience
Subjective
Norms
Opis:
This paper attempts to identify the relationship between Social media disengagement (SMD) and Social media experience (SME), perceived anonymity (PA), perceived credibility (PC) and subjective norms (SN), individual characteristics (IC) and to identify the most widely used social media network among Gen Y and Gen Z. A quantitative survey of 800 participants of Gen Y and Gen Z of Bangalore city were the respondents. A total of 532 responses were received, and the data were analyzed using SPSS. Results reveal that there is no correlation between SMD and SME, PC, PA and SN. However, the disengagement level varies across different social media networks like Instagram, Facebook, Twitter and LinkedIn. The study suggests that degree of social media activity combined with digital literacy enhances social media usage among millennials, and with improved customer engagement in social media, marketers can harness it positively to improve their product offerings and customer base. Social Media Disengagement was first studied in the Indian context and less explored compared to engagement. During the pandemic GenY and GenZ shared and cared for in the online platform, resulting in a sense of belongingness. Hence, their disengagement from social media, generates opportunities for marketers to have better connectivity.
Źródło:
Media Literacy and Academic Research; 2022, 5, 1; 230-252
2585-8726
Pojawia się w:
Media Literacy and Academic Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oscillation of time fractional vector diffusion-wave equation with fractional damping
Autorzy:
Ramesh, R.
Harikrishnan, S.
Nieto, J. J.
Prakash, P.
Powiązania:
https://bibliotekanauki.pl/articles/255843.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fractional diffusion-wave equation H-oscillation
vector differential equation
Opis:
In this paper, sufficient conditions for H-oscillation of solutions of a time fractional vector diffusion-wave equation with forced and fractional damping terms subject to the Neumann boundary condition are established by employing certain fractional differential inequality, where H is a unit vector in Rn. The examples are given to illustrate the main results.
Źródło:
Opuscula Mathematica; 2020, 40, 2; 291-305
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of Solubility and Mass Transfer Coefficient of Benzoic Acid Through Hydrotropy
Autorzy:
Prakash, G.D.
Kumar, S.T.
Gandhi, N.N.
Powiązania:
https://bibliotekanauki.pl/articles/779266.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
hydrotropy
solubilization
mass-transfer coefficient
benzoic acid
Opis:
The effect of hydrotropes such as sodium salicylate, sodium benzoate, and nicotinamide on the solubility and mass transfer coefficient of benzoic acid has been investigated. The solubility studies were carried out under a wide range of hydrotrope concentrations (0 to 3.0 mol/L) and different system temperatures (303K to 333K). It has been observed that the solubility and mass transfer coefficient of benzoic acid increases with an increase in hydrotrope concentration and also with system temperature. A Minimum Hydrotrope Concentration (MHC) was found essential to initiate a significant increase in the solubility and the mass transfer coefficient. The maximum enhancement factor (?s), which is the ratio of the solubility value in the presence and absence of a hydrotrope, has been determined for all sets of experimentations. The solubility of benzoic acid has been enhanced to 19.98 times in the presence of 2.5 mol/L concentration of sodium salicylate hydrotrope at 333K.The effectiveness of hydrotropes was measured in terms of Setschenow constant Ks and the highest value has been observed as 0.502 for sodium salicylate.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 1; 46-50
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the Effect of Nitrate Esters on the Properties of Advanced Energetic Propellants
Autorzy:
Kumar, Amit
Chavan, Prakash V
Sadavarte, Vaibhav S
Bhowmik, Debdas
Mada, S.S.N.M. Santosh
Pande, Shrikant M.
Powiązania:
https://bibliotekanauki.pl/articles/1062883.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
nitroglycerine
NG
butanetriol trinitrate
BTTN
strain capability
thermal decomposition
Opis:
Propulsion designers all over the world are exploring the possibility of achieving higher performance by enhancing the energy of solid propellants. This can be achieved by replacing non-energetic ingredients with energetic ones or by replacing low density ingredients, particularly binders, with higher density ones, without affecting the processibility and ageing characteristics. The same has been attempted by using nitroglycerine (NG) and butanetriol trinitrate (BTTN) as plasticizers in propellant compositions. In the present study, NG and BTTN have been used in different plasticizer to polymer ratios (Pl/Po) and various parameters of each composition have been theoretically predicted. Three propellant compositions plasticized with NG, BTTN and a 1:1 combination of NG and BTTN, have been processed and analyzed for targeted properties. From the theoretical data, it was observed that there is a negligible increase in density impulse beyond a Pl/Po ratio of 2, apart from the higher density and calorimetric values of the NG-plasticized propellant; these plasticizers have a significant effect on the ballistic and mechanical properties. Another observation was that the elongation of BTTN and NG/BTTN (1:1) plasticized propellants is significantly higher at a low crosshead rate than NG-plasticized propellant, implying that the two former propellants have higher strain capabilities at low temperatures and can be used for missiles having long term low temperature storage requirements. Thermal decomposition studies have been carried out by DSC, and for each composition 5 distinct peaks were observed.
Źródło:
Central European Journal of Energetic Materials; 2020, 17, 3; 384-407
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Why didn’t Nepal Join the Indo-Pacific Strategy (IPS)? A Critical Assessment of Nepal’s Foreign Policy Response to IPS
Autorzy:
Bhattarai, Gaurav
Bista, Prakash
Adhikari, Sudip
Powiązania:
https://bibliotekanauki.pl/articles/2154704.pdf
Data publikacji:
2022-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Indo-Pacific Strategy
Nepal
China
United States
geopolitics
Opis:
The significance of maritime interactions has impacted coastal and landlocked countries. Nepal’s response to the US-led Indo-Pacific Strategy (IPS) signifies the same. For Nepal, crossing seas was culturally associated with sin as an objective to fulfill the isolationist policy adopted until the political change of 1950. As such, Nepal’s interaction with the sea was not so friendly in the past. However, these historical shreds of evidence cannot suffice as the reason behind her denial of joining the IPS. Most of the available literature divulges the sensitive geographical position of Nepal in the context of the rise of China and the projection of a ‘new Cold War’ for its reluctance to join the Indo-Pacific strategy. However, they fail to probe into the domestic intricacies contributing to the hesitation. In this context, this paper primarily tries to dwell upon the actors and factors that have influenced Nepal’s dubiety in joining the Indo-Pacific Strategy. Thus, this paper aims to fulfill two objectives. First, to analyze the role of geographical sensitivity, and second, to scrutinize the domestic interplay of things. As exploratory qualitative research, this study reviews the official documents, agreements, statements, speeches, and reports from think tanks and newspapers to hypothesize that besides external factors there are integral internal elements that have played a part in Nepal’s denial to join the strategic partnership.
Źródło:
Azja-Pacyfik; 2022, XXVI; 27-43
1643-692X
Pojawia się w:
Azja-Pacyfik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Path of a Saint: Buddhaghosa’s Argument for Sustainable Development
Ścieżka świętego: argument Buddaghosy na rzecz zrównoważonego rozwoju
Autorzy:
Prakash, Gyan
Powiązania:
https://bibliotekanauki.pl/articles/371084.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Komitet Człowiek i Środowisko PAN
Tematy:
early Buddhism
sustainable development
religion
Buddhaghosa
natural resources
wczesny Buddyzm
zrównoważony rozwój
religia
Buddaghosa
zasoby naturalne
Opis:
A philosophical investigation of sustainable development has much to contribute to the study of philosophy of religion because religion has significant effect on human behavior. In Indian philosophy, to be precise, early Buddhist Philosophy argues for individual suffering and it’s solution. Notwithstanding, there is an argument that Buddhist philosophy does not motivate an individual to make efforts for sustainable development or preservation of natural resources. Therefore, one cannot contemplate the problem of sustainable development under early Buddhist philosophical framework. To refute this view, I have attempted to analyze Buddhaghosa’s notion of virtue. In this paper, I have argued that, there is a significant implication of the study of virtue for the area of sustainable development. This, consequentially, imparts significance to the balanced consumption of natural resources and balanced consumption of natural resources is vital for sustainable development.
Filozoficzne badanie zrównoważonego rozwoju ma duży wkład w studiowanie filozofii religii, ponieważ religia ma znaczący wpływ na ludzkie zachowanie. Mówiąc precyzyjniej, w filozofii indyjskiej wczesna filozofia buddyjska opowiada się za indywidualnym cierpieniem i rozwiązaniem. Niezależnie od tego istnieje argument, że filozofia buddyjska nie motywuje jednostki do podejmowania wysiłków na rzecz zrównoważonego rozwoju lub zachowania zasobów naturalnych. Dlatego nie można kontemplować problemu zrównoważonego rozwoju we wczesnych buddyjskich ramach filozoficznych. Aby obalić ten pogląd, próbowałem przeanalizować pojęcie cnoty Buddhaghosy. W tym artykule argumentowałem, że badanie cnoty ma znaczący wpływ wspieranie zrównoważonego rozwoju. W konsekwencji nadaje to znaczenie zrównoważonemu zużyciu zasobów naturalnych, a zrównoważone zużycie zasobów naturalnych ma zasadnicze znaczenie dla zrównoważonego rozwoju.
Źródło:
Problemy Ekorozwoju; 2020, 15, 2; 205-209
1895-6912
Pojawia się w:
Problemy Ekorozwoju
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of hydrotropes on the solubility and mass transfer coefficient of 2-nitrobenzoic acid
Autorzy:
Thenesh-Kumar, S.
Gnana-Prakash, D.
Nagendra-Gandhi, N.
Powiązania:
https://bibliotekanauki.pl/articles/779314.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
hydrotrop
solubilizacja
współczynnik wymiany masy
separacja
hydrotropy
solubilization
mass transfer coefficient
separation
Opis:
A comprehensive investigation on the solubility and mass transfer coefficient enhancement of 2-nitrobenzoic acid through hydrotropy, has been undertaken. The solubility and mass transfer coefficient studies were carried out using hydrotropes such as sodium acetate, citric acid and nicotinamide under a wide range of hydrotrope concentrations (0 to 3.0 mol/L) and different system temperatures (303 to 333 K). It was found that the solubility and mass transfer coefficient of 2-nitrobenzoic acid increases with an increase in hydrotrope concentration and also with system temperature. All hydrotropes used in this work showed an enhancement in the solubility and mass transfer coefficient to different degrees. The maximum enhancement factor value has been determined for both the solubility and mass transfer coefficient. The effectiveness of hydrotropes was measured in terms of Setschnew constant Ks and reported for all the hydrotropes used in this study.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 2; 55-59
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Comfort Properties of Bi-Layer Knitted Fabrics
Właściwości termiczne dzianin dwuwarstwowych
Autorzy:
Udaya Krithika, S. M.
Prakash, C.
Sampath, M. B.
Senthil Kumar, M.
Powiązania:
https://bibliotekanauki.pl/articles/232802.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
bi-layer knitted fabric
polyester
comfort
thermal comfort
dzianina dwuwarstwowa
poliester
komfort
komfort termiczny
Opis:
Transmission of sensible and insensible perspiration is an important factor for fabric comfort. Improvement in the thermal comfort properties of knitted fabrics results in the achievement of fabric comfort. In this research, the thermal comfort properties of six bi-layer knitted fabrics were studied. The bi-layer knitted fabrics were made with different combinations of yarn in the inner layer and outer layer. The yarn combinations selected were polyester staple yarn-polyester staple yarn, polyester staple yarn-cotton, cotton-cotton, polypropylene-cotton, micro denier polyester-cotton, and micro denier polyester- micro denier polyester for the inner and outer layers, respectively. To find the thermal comfort properties of the six bi-layer knitted fabrics, an objective fabric test was carried out. The results showed that the bi-layer fabrics made from micro denier polyester, both in the inner and outer layers, exhibit better thermal comfort properties, thereby providing a higher level of comfort; hence, they are preferred for active sportswear. The water vapour permeability, air permeability, thermal resistance and thermal conductivity of the bi-layer knitted fabric made up of micro denier polyester as the outer and inner layer were found to be higher when compared to the other bi-layer structures. The results were discussed together with one – way ANOVA test results at a 0.05 significance level.
Przenoszenie wyczuwalnego i niewyczuwalnego potu jest ważnym czynnikiem zapewniającym komfort użytkowania wyrobu. Poprawa właściwości komfortu termicznego dzianin skutkuje uzyskaniem komfortu użytkowania wyrobu. W pracy zbadano właściwości komfortu termicznego sześciu dwuwarstwowych dzianin. Dzianiny dwuwarstwowe zostały wykonane z różnych kombinacji przędzy w warstwie wewnętrznej i zewnętrznej. Wybrane kombinacje przędzy to: przędza cięta poliestrowo-poliestrowa, przędza odcinkowa poliestrowo-bawełniana, bawełniano-bawełniana, polipropylenowo-bawełniana, mikro denierowy poliester-bawełna i mikro denierowy poliester-poliester odpowiednio dla warstwy wewnętrznej i zewnętrznej. Aby określić właściwości komfortu termicznego sześciu dwuwarstwowych dzianin, przeprowadzono obiektywne testy wyrobów. Wyniki pokazały, że dwuwarstwowe dzianiny wykonane z poliestru mikro denierowego, zarówno w warstwie wewnętrznej, jak i zewnętrznej, wykazują lepsze właściwości komfortu termicznego, zapewniając w ten sposób wyższy poziom komfortu; dlatego są preferowane w produkcji aktywnej odzieży sportowej. Stwierdzono, że przepuszczalność pary wodnej, przepuszczalność powietrza, opór cieplny i przewodność cieplna dzianiny dwuwarstwowej wykonanej z poliestru mikro denierowego jako warstwy zewnętrznej i wewnętrznej są wyższe w porównaniu z innymi strukturami dwuwarstwowymi. Wyniki przeanalizowano za pomoca testu ANOVA na poziomie istotności 0,05.
Źródło:
Fibres & Textiles in Eastern Europe; 2020, 5 (143); 50-55
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 16

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