Autor: Kumar, Suresh - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Energetic & exergetic analysis of a parabolic trough: concentrated solar power plant
Autorzy:: Nagpal, Mohit
Maithani, Rajesh
Kumar, Suresh
Tematy:: solar energy
exergy
thermal efficiency
heat gain
heat losses
parabolic trough
collectors
energia słoneczna
egzergia
wydajność termiczna
zyski ciepła
straty ciepła
kolektory; Pokaż więcej
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Powiązania:: https://bibliotekanauki.pl/articles/2142893.pdf Link otwiera się w nowym oknie
Opis:: Solar energy is the most affordable source of energy. Parabolic trough systems are used to concentrate and extract heat, therefore it’s very significant to analyse its performance in terms of energy and exergy. Exergy based analysis of the system ensures the eradication of losses, resulting in the yield of energy of the highest quality. In this paper, an investigation has been carried out using numerical simulation with an objective of analysis of Parabolic Trough Collectors on the basis of energy and exergy. Detailed second law analysis has been performed by varying the system and operating parameters through computer simulation. Exergy output has been determined by analysing the effect of major system parameters, namely, mirror reflectivity, glass transmissivity, absorptivity, the diameter of glass envelop, and the receiver. The operating parameters considered in the investigation are insolation and temperature rise parameters. The extensive investigation of the parabolic trough of a concentrated solar power plant for various design parameters in the range of operating parameters reveals that it is beneficial to operate the system at higher temperature as opposed to the preference of the operating system at lower temperature from purely thermal considerations.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Method of research for solar cookers performance characteristics- analysis and comparison
Autorzy:: Raghav, Geetanjali
Sharma, Pankaj Kumar
Kumar, Suresh
Maithani, Rajesh
Tematy:: solar cookers
cooking
plate temperature
thermal performance
kuchenka słoneczna
gotowanie
wydajność cieplna; Pokaż więcej
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Powiązania:: https://bibliotekanauki.pl/articles/1833748.pdf Link otwiera się w nowym oknie
Opis:: Cooking is one of the most common activity in day-to-day life of every woman. In rural areas the transportation of fuel is major problem and the increasing demand of energy for cooking applications is gaining importance and various investigations are being carried out for performance enhancement of the solar cooker. The box-type solar cooker has a complex thermal analysis due to the transient heat transfer phenomenon involved in three dimensions. A comparison of the standard correlation available are analysed for accuracy of predicted results with experimental data. The investigation involves the experimental determination of the parameters viz. wind heat transfer coefficient, side and bottom loss coefficient, inner and outer glass temperature. The extensive data is analysed with that of standard correlations and the significance of the experimental data is checked. Analysis found to have deviation of 3%-20% in experimental and correlation data, which indicates that for accuracy of performance analysis the studied parameters should be determined experimentally.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Photocatalytic degradation of reactive dyes and real textile composite wastewater using TiO2/MWCNT nanocomposite under UVA and UVA-LED irradiation. A comparative study
Autorzy:: Kumar, Deivanai Suresh
Sellappa, Kanmani
Tematy:: carbon nanotubes
methylene blue
photodegradation
nanorurki węglowe
błękit metylenowy
fotodegradacja; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/207478.pdf Link otwiera się w nowym oknie
Opis:: Nano TiO₂ and TiO₂/MWCNT nanocomposite synthesized by the sol-gel method were characterized by XRD, BET, SEM, EDAX and FTIR techniques. These nanoparticles were used for photocatalytic decolorisation and degradation of three different reactive dyes such as Reactive Orange 16 (RO 16), Reactive Yellow 145 (RY 145) and Reactive Red 195 (RR 195) and real textile composite wastewater under the UVA and UVA-LED irradiation at room temperature. The maximum color removal of 96% and COD removal of 72% were achieved after 5 h in the presence of TiO₂/MWCNT and H₂O₂ under UVA-LED irradiation. The kinetic studies obey pseudo-first order kinetics which is discussed in terms of the Langmuir–Hinshelwood kinetic model. The maximum degradation of 50% was achieved after 5 h in the presence of H₂O₂ using TiO₂/MWCNT/UVA-LED for real textile composite wastewater. This study revealed that TiO₂/MWCNT has improved the photocatalytic activity when compared to that of bare TiO₂ under similar conditions. UVA-LED could be an alternative light source for the replacement of the conventional UV light for the photocatalytic treatment of reactive dyes.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Analysis of solar cooker with thermal storage for remote hilly areas: determination of heating and cooling characteristic time
Autorzy:: Raghav, Geetanjali
Sharma, Pankaj Kumar
Kumar, Suresh
Maithani, Rajesh
Iung, Alexis
Quentin, Mercier
Tematy:: solar energy
solar cookers
thermal storage
thermal performance
energia słoneczna
kuchenka słoneczna
magazynowanie ciepła
wydajność cieplna; Pokaż więcej
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Powiązania:: https://bibliotekanauki.pl/articles/2142896.pdf Link otwiera się w nowym oknie
Opis:: Solar cooking finds a major application in rural areas of Uttarakhand, India, yet its utilization is still limited due to certain limitation such as intermittent nature of solar radiations. This drawback limits solar cooker in becoming a viable alternate solution of LPG and other pollution causing resources such as wood. In order to cater this problem a numerical analysis of box type solar cooker with storage is carried out. The energy stored in the storage material will keep the cooker warm up to the time when food is consumed. Charging and discharging time analysis is performed in with an aim to understand the effect of storage on solar cooker. Heating and cooling characteristic time are being evaluated and analysed with storage. Thermal performance of box type solar cooker is measured in terms of figures of merit according to BIS standards. The effect of storage has also been analysed in terms of charging and discharging time and first figure of merit of box type solar cooker.it has been observed that during discharging the heat is stored for more duration as compared to the charging time as discharge time is approx. 4-5 hours while charging time for the same amount of insolation is around 3-4 hours.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Randomized, open-label, controlled, comparative clinical study to evaluate the safety and efficacy of Pilex Forte tablets in combination with Pilex Ointment application for the effective management of common ano-rectal conditions
Autorzy:: Kumar, Suresh
Selvarajan, Sandhiya
Lakshmi, Prasanna
Paramesh, Rangesh
Kumawat, Rajesh
D, Palaniyamma
HA, Srikrishna
Tematy:: anorectal
fissure-in-ano
haemorrhoids; Pokaż więcej
Wydawca:: Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Powiązania:: https://bibliotekanauki.pl/articles/2040170.pdf Link otwiera się w nowym oknie
Opis:: Introduction. Haemorrhoids and anal fissures are considered as the most common anorectal conditions. Aim. To evaluate the safety and efficacy of Pilex Forte tablets in combination with Pilex Ointment as compared to the Standard of Care in common anorectal conditions. Material and methods. Randomized, open-label, controlled comparative clinical study conducted on 162 patients of either sex, aged between 18-50 years, confirmed with common anorectal conditions. As per randomization, patients received either standard of care or Pilex Forte tablet along with Pilex Ointment at a recommended dose of two tablets twice daily and twice daily local application (anal) for a period of 4 weeks. Clinical safety and efficacy assessments were carried out at study specific scheduled visits. Laboratory assessments were carried out only at screening and at the end of the study. Results. Patients who completed the study were considered for statistical analysis. Significant clinical improvement was observed in patients with anorectal conditions who received Pilex Forte tablet and Pilex Ointment than to those who received standards of care. No abnormal lab values were recorded and there were no adverse events reported during the study period. Conclusion. Pilex Forte tablet along with Pilex Ointment at recommended dose is safe and effective in the management of anorectal conditions like haemorrhoids and fissure-in-ano.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Parallel computing in automation of decoupled fluid-thermostructural simulation approach
Autorzy:: Glänzel, Janine
Naumann, Andreas
Kumar, Tharun Suresh
Tematy:: thermal effects
simulation
machine tool
environment
positioning error; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/100135.pdf Link otwiera się w nowym oknie
Opis:: Decoupling approach presents a novel solution/alternative to the highly time-consuming fluid-thermal-structural simulation procedures when thermal effects and resultant displacements on machine tools are analyzed. Using high dimensional Characteristic Diagrams (CDs) along with a Clustering Algorithm that immensely reduces the data needed for training, a limited number of CFD simulations can suffice in effectively decoupling fluid and thermal-structural simulations. This approach becomes highly significant when complex geometries or dynamic components are considered. However, there is still scope for improvement in the reduction of time needed to train CDs. Parallel computation can be effectively utilized in decoupling approach in simultaneous execution of (i) CFD simulations and data export, and (ii) Clustering technique involving Genetic Algorithm and Radial Basis Function interpolation, which clusters and optimizes the training data for CDs. Parallelization reduces the entire computation duration from several days to a few hours and thereby, improving the efficiency and ease-of-use of decoupling simulation approach.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: The use of topical metronidazole in the management of seborrheic dermatitis – a systematic review and meta-analysis of randomized controlled trials
Autorzy:: Lee, E. Lyn
Shanmugham, Suresh
Kumar, Suresh
Smales, Frederick Charles
Ching, Siew Mooi
Veettil, Sajesh K.
Tematy:: dermatitis
meta-analysis
metronidazole
seborrheic; Pokaż więcej
Wydawca:: Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Powiązania:: https://bibliotekanauki.pl/articles/62645175.pdf Link otwiera się w nowym oknie
Opis:: Introduction and aim. Topical metronidazole, with its well-known anti-inflammatory and antibacterial properties, could be beneficial for managing seborrheic dermatitis (SD), but studies report conflicting results. The aim was to evaluate the efficacy and safety of topical metronidazole in the treatment of SD. Material and methods. A systematic search of Medline, Embase, and CENTRAL was conducted from inception to April 2024. Randomized controlled trials (RCTs) comparing metronidazole to any comparator for SD were included in this study. Data were pooled using random-effects models. Analysis of the literature. Seven RCTs were included. Overall, topical metronidazole did not significantly reduce SD symptom severity when compared to any comparator/treatment. However, it significantly reduced symptom severity compared to placebo after 4 to 8 weeks (standardized mean difference (SMD) -3.00, 95% CI, -5.21 to -0.78). Specifically for facial SD, metronidazole showed significant symptom reduction (SMD -0.85, 95% CI, -1.41 to -0.29). No significant differences were found in the proportion of patients with clinical improvement or side effect frequency. Most studies had a high risk of bias and lacked information on missing data and assessor masking. Conclusion. Topical metronidazole demonstrates potential for managing SD, but current trials lack quality. Larger, high-quality trials are needed to confirm its efficacy and compare it with other treatments for SD.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Monitoring land use land cover change and its impact on climatic parameters using remote sensing and GIS: a case study of lower Dibang Valley, Arunachal Pradesh, India
Monitoring zmian użytkowania i pokrycia terenu oraz ich wpływu na parametry klimatyczne przy użyciu teledetekcji i GIS: studium przypadku w Dolinie Dolny Dibang, Arunachal Pradesh, Indie
Autorzy:: Patil, Prashant
Patil, Chidanand
Musalvad, Shravankumar
Hegde, Nagaraj
Sahoo, Uttam Kumar
Janardhana, Satish Tarekodlu
Kumar, Suresh
Lyngdoh, Nicolee
Tematy:: land use land cover
LULC
machine learning
Landsat-8
change detection
użytkowanie i pokrycie terenu
uczenie maszynowe
wykrywanie zmian; Pokaż więcej
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:: https://bibliotekanauki.pl/articles/56330234.pdf Link otwiera się w nowym oknie
Opis:: The changes in the socio-dynamics and the pattern of occurrences of natural hazards both at larger and regional scales have been influenced by the alterations in the Land use land cover change (LULCC) modifications. The LULCC of Lower Dibang valley of Arunachal Pradesh is investigated using contemporary tools of Remote sensing and Geographic Information system. A temporal analysis is done for the years viz, 2009, 2014, and 2021 using USGS Landsat satellite images. To determine the change in LULCC support vector machine a supervised classification method is used and is cross checked with Google Earth points for achieving accuracy and the temporal analysis is done by comparing each images pixel by pixel. The findings show that between 2009 and 2021, the region had significant changes in land cover in the following areas: forest area (–8%), rangeland/scrubland (–6%), barren land/bare soil/open rocks (–1%), agricultural (-2%), and water body/river (–1%). It was observed that lowland and higher altitude regions saw the majority of the LULCC alterations. In the seven tehsils of the Lower Dibang Valley of Arunachal Pradesh, which are located at varying elevations and slopes, the effects of LULC changes on climatic and environmental variables such as latent/sensible heat flow, temperature, precipitation, and specific humidity have been evaluated independently. This research paper’s methodology and results section includes a full explanation of the procedures followed and the outcomes.
Na zmiany socjodynamiki i wzorca występowania naturalnych zagrożeń zarówno w skali regionalnej, jak i większej mają wpływ modyfikacje użytkowania i pokrycia terenu (ang. land use land cover change – LULCC). Wskaźnik LULCC w Dolinie Dolny Dibang w Arunachal Pradesh badano przy użyciu nowoczesnych narzędzi teledetekcyjnych oraz Geograficznego Systemu Informacji (GIS). Analizę zmian w czasie przeprowadzano dla lat 2009, 2014 i 2021 przy pomocy zobrazowań satelitarnych USGS Landsat. Aby określić zmiany w LULCC zastosowano maszynę wektorów nośnych, metodę klasyfikacji nadzorowanej, którą skonfrontowano z punktami w Google Earth, aby osiągnąć dokładność, a analizy zmian w czasie dokonano porównując każdy obraz piksel po pikselu. Wyniki pokazują, że pomiędzy rokiem 2009 i 2021 region ulegał znaczącym zmianom pokrycia terenu w następujących aspektach: zalesienie (–8%), pastwiska/zarośla (–6%), ogołocona ziemia/gołe skały (–1%), obszary rolnicze (–2%) oraz zbiorniki wodne/rzeki (–1%). Zaobserwowano, że większość zmian LULCC wystąpiła na nizinach i większych wysokościach. W siedmiu tehsilach (jednostka administracyjna) Doliny Dolnego Dibangu (Arunachal Pradesh) położonych na różnych wysokościach i stokach niezależnie oceniono skutki zmian LULC w odniesieniu do parametrów klimatu i środowiska, takich jak przepływ ciepła utajonego/jawnego, temperatura, opady oraz wilgotność właściwa. Rozdziały pracy przedstawiające metodykę i wyniki w pełni objaśniają użyte procedury i otrzymane rezultaty.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Parameterization of environmental influences by automated characteristic diagrams for the decoupled fluid and structural-mechanical simulations
Autorzy:: Glänzel, Janine
Kumar, Tharun Suresh
Naumann, Christian
Putz, Matthias
Tematy:: thermal effects
simulation
machine tool
environment
positioning error; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/99399.pdf Link otwiera się w nowym oknie
Opis:: Thermo-elastic effects contribute the most to positioning errors in machine tools especially in operations where high precision machining is involved. When a machine tool is subjected to changes in environmental influences such as ambient air temperature, velocity or direction, then flow (CFD) simulations are necessary to effectively quantify the thermal behaviour between the machine tool surface and the surrounding air (fluid). Heat transfer coefficient (HTC) values effectively represent this solid-fluid heat transfer and it serves as the boundary data for thermo-elastic simulations. Thereby, deformation results can be obtained. This two-step simulation procedure involving fluid and thermo-structural simulations is highly complex and time-consuming. A suitable alternative for the above process can be obtained by introducing a clustering algorithm (CA) and characteristic diagrams (CDs) in the workflow. CDs are continuous maps of a set of input variables onto a single output variable, which are trained using data from a limited number of CFD simulations which is optimized using the clustering technique involving genetic algorithm (GA) and radial basis function (RBF) interpolation. The parameterized environmental influences are mapped directly onto corresponding HTC values in each CD. Thus, CDs serve as look-up tables which provide boundary data (HTC values along with nodal information) under several load cases (combinations of environmental influences) for thermo-elastic simulations. Ultimately, a decoupled fluid-structural simulation system is obtained where boundary (convection) data for thermo-mechanical simulations can be directly obtained from CDs and would no longer require fluid simulations to be carried out again. Thus, a novel approach for the correction of thermo-elastic deformations on a machine tool is obtained.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Assessing Macroeconomic Influences on Indian Sovereign Bond Yields: An Insight from the ARDL Bound Test Approach
Ocena wpływów makroekonomicznych na rentowność indyjskich obligacji skarbowych – spostrzeżenia z podejścia opartego na teście granic ARDL
Autorzy:: Utsav
Patra, Suresh Kumar
Naik, Pramod Kumar
Tematy:: ARDL
wzrost gospodarczy
stopa procentowa
wskaźnik polityki pieniężnej
economic growth
interest rate
monetary policy index; Pokaż więcej
Wydawca:: Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Powiązania:: https://bibliotekanauki.pl/articles/55993146.pdf Link otwiera się w nowym oknie
Opis:: This paper investigates the long-term and short-term determinants of sovereign bond yields in India, a critical macroeconomic indicator closely monitored by investors and central banks. According to term structure theory, the shape of bond yields is a key economic barometer, reflecting the overall health of the economy. Using monthly time series data from April 2001 to March 2021, the study examines variables such as long-term sovereign bond yields, short-term Treasury bill yields, economic growth, inflation, the monetary policy index, exchange rates, foreign exchange reserves, gross fiscal deficit, and global Brent crude oil prices. By accounting for structural breaks under the ARDL framework, in the presence of other controlled variables, the analysis confirmed that short-term interest rates influence long-term interest rates, validating the Keynesian conjecture in the Indian context. Additionally, economic growth, the monetary policy index, and global Brent crude oil price are identified as significant drivers of long-term interest rates. These findings have important policy implications for monetary-fiscal coordination, especially in debates on the appropriate policy mix during boom-and-bust cycles. Consequently, monetary policy should be reviewed comprehensively, incorporating a broad range of macroeconomic variables.
Rentowność obligacji to wskaźnik najczęściej obserwowany przez inwestorów i bank centralny kraju. Zgodnie z teorią struktury terminowej kształt rentowności obligacji jest kluczowym barometrem gospodarczym i określa się go mianem wskaźnika kondycji gospodarki. W artykule opisano badania długoterminowych i krótkoterminowych determinant rentowności długoterminowych obligacji skarbowych w Indiach. W badaniu wykorzystano miesięczne zmienne makroekonomiczne szeregów czasowych, takie jak rentowność długoterminowych obligacji skarbowych, rentowność krótkoterminowych bonów skarbowych, wzrost gospodarczy, inflacja, wskaźnik polityki pieniężnej, kurs wymiany, rezerwy walutowe, deficyt budżetowy brutto i światowa cena ropy Brent w okresie od kwietnia 2001 r. do marca 2021 r. Uwzględniając załamania strukturalne w ramach ARDL w obecności innych kontrolowanych zmiennych, ustalono, że krótkoterminowe stopy procentowe wpływają na długoterminowe stopy procentowe, co potwierdza słuszność hipotezy Keynesa w kontekście Indii. Stwierdzono również, że wzrost gospodarczy, wskaźnik polityki pieniężnej i cena ropy Brent na świecie również są czynnikami wpływającymi na długoterminową stopę procentową. Ustalenia te mają istotne implikacje polityczne dla obecnych dyskusji na temat kombinacji polityk podczas cykli wzrostów i spadków oraz koordynacji monetarno-fiskalnej. Dlatego też politykę pieniężną należy poddać przeglądowi z uwzględnieniem wszystkich zmiennych makroekonomicznych.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "Kumar, Suresh" wg kryterium: Autor