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    Wyświetlanie 1-15 z 15
    Tytuł:
    Solution and Generalized Ulam-Hyers Stability of a Reciprocal Type Functional Equation in Non-Archimedean Fields
    Autorzy:
    Kumar, B. V. Senthil
    Ravi, K.
    Rassias, J. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193002.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Generalized Hyers-Ulam stability
    Reciprocal function
    Reciprocal type functional equation
    Opis:
    In this paper, we obtain the general solution of a reciprocal type functional equation of the type f(x+y)=f((k_1 x+k_2 y)/k)f((k_2 x+k_1 y)/k)/(f((k_1 x+k_2 y)/k)+f((k_2 x+k_1 y)/k) ) and investigate its generalized Ulam-Hyers stability in non-Archimedean fields where k>2, k_1 and k_2 are positive integers with k=k_1+k_2 and k_1≠k_2. We also establish Hyers-Ulam-Rassias stability, Ulam-Gavruta-Rassias stability and J.M. Rassias stability controlled by the mixed product-sum of powers of norms for the same equation.
    Źródło:
    World Scientific News; 2016, 31; 48-58
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Immunomodulatory activity of ethanolic leaf extract of Terminalia chebula
    Autorzy:
    Vadlamani, S.
    Bala Durga, D.K.A.
    Kumar, B.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/11323.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Terminalia chebula, a plant rich with phytochemicals, was selected in the present investigation for evaluating its immunomodulatory activities. Extract of the leaves were prepared in various solvents. Ethanolic extract was found to contain significant amount of phytochemicals. Hence, it was selected to study immunomodualtory activity. Silica gel column chromatography of ethanolic extract was performed. The fractions were further subjected to TLC and most active fractions were administrated to balb/C mice for evaluating immunomodulatory studies. Out of the five fraction (S1 – S5), S3 was found to possess immunostimulant activity. Provision of Ethanol Extracts of Terminalia chebula on balb/C mice can increase the antibody titers IgM and IgG.
    Źródło:
    International Letters of Natural Sciences; 2015, 47
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Farmers perception of causes and consequences of their indebtedness in Haryana, India
    Postrzeganie przyczyn i konsekwencji zadłużenia przez rolników w stanie Hariana w Indiach
    Autorzy:
    Jakhar, B.
    Kait, R.
    Kumar, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048756.pdf
    Data publikacji:
    2022-03-31
    Wydawca:
    Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
    Tematy:
    indebtedness
    Haryana State agriculture
    debt types
    consequences
    Opis:
    Subject and purpose of work: The study aims to highlight the perception of farmers regarding the causes and consequences of their indebtedness. Materials and methods: The study was based on primary data collected (by field survey) from a sample of 600 farmers. With regards to the selection of farmers or respondents,the proportionate sampling technique was employed. Percentage technique was used for data analysis. The data were collected in the first quarter of 2021. Results: It was found that 95.67% of the farmers (out of 600) reported low prices for agricultural output as being the main cause of their indebtedness, followed by crop failure (89.00%), the high cost of inputs (85.00%), high interest rates (61.17%) and small landholdings (58.83%). In addition, consequences reported by loanee farmers were deterioration in their social status (67.83%) and psychological stress (57.67%). However, positive changes experienced by farmers after repaying a loan were less than the negative experiences. Conclusions: The main causes of farmers’ indebtedness were crop failure and the high cost of inputs compared to the price of their produce. Due to their indebtedness, their economic and social status deteriorated and they experienced the feeling of insecurity.
    Źródło:
    Economic and Regional Studies; 2022, 15, 1; 56-73
    2083-3725
    2451-182X
    Pojawia się w:
    Economic and Regional Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of GA & DE algorithm for the economic operation of a power system using FACTS devices
    Autorzy:
    Bhattacharyya, B.
    Gupta, V. K.
    Kumar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/141459.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FACTS devices
    line power flow
    FACTS devices & its optimal locations
    genetic algorithm
    differential evolution technique
    Opis:
    The problem of improving the voltage profile and reducing power loss in electrical networks must be solved in an optimal manner. This paper deals with comparative study of Genetic Algorithm (GA) and Differential Evolution (DE) based algorithm for the optimal allocation of multiple FACTS (Flexible AC Transmission System) devices in an interconnected power system for the economic operation as well as to enhance loadability of lines. Proper placement of FACTS devices like Static VAr Compensator (SVC), Thyristor Controlled Switched Capacitor (TCSC) and controlling reactive generations of the generators and transformer tap settings simultaneously improves the system performance greatly using the proposed approach. These GA & DE based methods are applied on standard IEEE 30 bus system. The system is reactively loaded starting from base to 200% of base load. FACTS devices are installed in the different locations of the power system and system performance is observed with and without FACTS devices. First, the locations, where the FACTS devices to be placed is determined by calculating active and reactive power flows in the lines. GA and DE based algorithm is then applied to find the amount of magnitudes of the FACTS devices. Finally the comparison between these two techniques for the placement of FACTS devices are presented.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 4; 541-552
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tidal characteristics in the Gulf of Khambhat, Northern Arabian Sea — based on observation and global tidal model data
    Autorzy:
    Mitra, A.
    Kumar, V.S.
    Jena, B.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079079.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    tidal model
    sea level
    wind
    bathymetry
    MIKE21 model
    FES2014 model
    Khambhat Gulf
    Arabian Sea
    Opis:
    Tidal characteristics of the Gulf of Khambhat are described based on measured and modelled sea-level data. Data were recorded at three locations inside and two locations outside the Gulf with record lengths of 6–12 months to study the tidal propagation. A northward increase in tidal amplitude is noticed from Daman (eastern side) and Diu (western side) and attains maxima at Bhavnagar. A similar trend is followed by the amplitude of the major tidal constituents, although there are discrepancies for that of the minor constituents. The non-tidal factor which influences the sea-level is the local wind, especially the alongshore component of wind. A positive correlation is obtained between the sea-level and the meridional component of wind at each location. Harmonic analysis of sea-level data shows that M2 is the major tidal constituent which propagates in a non-linear fashion inside the Gulf. Tides from two global tide models (MIKE21 and FES2014) have been compared with the measured data, which could be used for further prediction of the tides and sediment transport in the Gulf. The tide elevation derived from the MIKE21 model has further been used for the harmonic analysis of tide. The tides predicted using one-month data are up to 10% smaller than those predicted using the one-year data. The global tide model FES2014 data performs well with measured data for offshore locations, whereas it fails to predict the same for the inner Gulf locations. The study manifests the fact that to understand the dynamics of complex tidal areas, regional models should better be used than global tidal models.
    Źródło:
    Oceanologia; 2020, 62, 4PA; 443-459
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pomegranate fruit quality assessment using machine intelligence and wavelet features
    Autorzy:
    Kumar, A.
    Rajpurohit, V.S.
    Jirage, B.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2137.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Ogrodnictwa
    Tematy:
    pomegranate
    Punica granatum
    fruit
    quality assessment
    artificial neural network
    support vector machine
    Źródło:
    Journal of Horticultural Research; 2018, 26, 1
    2300-5009
    Pojawia się w:
    Journal of Horticultural Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lattice Thermal Conductivity of GaAs
    Autorzy:
    Ataullah Ansari, M.
    Ashokan, V.
    Indu, B.
    Kumar, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1489863.pdf
    Data publikacji:
    2012-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.20.kd
    66.70.Df
    63.22.Rc
    63.20.Ry
    Opis:
    A new approach to evaluate the relaxation times of various collision events responsible for thermal transport has been reported through which various deficiencies of earlier models of lattice thermal conductivity have been resolved. These investigations involve the evaluation of the phonon Green functions via a non-perturbative approach. The new expressions of relaxation times expressions for scattering of phonons by boundaries, atomic impurities, phonon-phonon scattering, electron-phonon scattering are the new features of the theory. The lattice thermal conductivity of three samples of GaAs has been analyzed on the basis of modified Callaway model and fairly good agreement between theory and experimental observations has been reported.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 3; 639-646
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An extended finite difference method for singular perturbation problems on a non-uniform mesh
    Autorzy:
    Swarnakar, D.
    Kumar, V. Ganesh
    Soujanya, G. B. S. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174215.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    siatka niejednorodna
    metoda różnic skończonych
    warstwa graniczna
    non uniform grid
    finite difference method
    singular perturbation
    boundary layer
    Opis:
    An extended second order finite difference method on a variable mesh is proposed for the solution of a singularly perturbed boundary value problem. A discrete equation is achieved on the non uniform mesh by extending the first and second order derivatives to the higher order finite differences. This equation is solved efficiently using a tridiagonal solver. The proposed method is analysed for convergence, and second order convergence is derived. Model examples are solved by the proposed scheme and compared with available methods in the literature to uphold the method.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 203--214
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unequally Spaced Antenna Array Synthesis Using Accelerating Gaussian Mutated Cat Swarm Optimization
    Autorzy:
    Kumar, Prasanna K.
    Pappula, Lakshman
    Madhav, B. T. P.
    Prabhakar, V. S. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058505.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Gaussian mutation
    cat swarm optimization
    linear antenna array
    PSLL
    Opis:
    Low peak sidelobe level (PSLL) and antenna arrays with high directivity are needed nowadays for reliable wireless communication systems. Controlling the PSLL is a major is sue in designing effective antenna array systems. In this paper, a nature inspired technique, namely accelerating Gaussian mutated cat swarm optimization (AGMCSO) that attributes global search abilities, is proposed to control PSLL in the radiation pattern. In AGM-SCO, Gaussian mutation with an acceleration parameter is used in the position-updated equa tion, which allows the algorithm to search in a systematic way to prevent premature convergence and to enhance the speed of convergence. Experiments concerning several benchmark multimodal problems have been conducted and the obtained results illustrate that AGMCSO shows excellent performance concerning evolutionary speed and accuracy. To validate the overall efficacy of the algorithm, a sensitivity analysis was per formed for different AGMCSO parameters. AGMCSO was researched on numerous linear, unequally spaced antenna ar rays and the results show that in terms of generating low PSLL with a narrow first null beamwidth (FNBW), AGMCSO out performs conventional algorithms.
    Źródło:
    Journal of Telecommunications and Information Technology; 2022, 1; 99--109
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of VBLAST Equalization Technique for Underwater Acoustic Communications
    Autorzy:
    Pranitha, B.
    Anjaneyulu, L.
    Minh, Hoa
    Aslam, Nauman
    Kumar, Sandeep V.
    Powiązania:
    https://bibliotekanauki.pl/articles/227284.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    underwater acoustic communication (UWAC)
    multiple input multiple output (MIMO)
    zero-forcing (ZF)
    vertical-Bell laboratories layered space-time (VBLAST)
    Opis:
    Underwater Acoustic Communications (UWAC) is an emerging technology in the field of underwater communications, and it is challenging because of the signal attenuation of the sound waves. Multiple Input and Multiple- Output (MIMO) is introduced in UWAC because of its support in enhancing the data throughput even under the conditions of interference, signal fading, and multipath. The paper presents the concept and analysis of 2 × 2 MIMO UWAC systems that uses a 4 - QAM spatial modulation scheme thus minimizing the decoding complexity and overcoming the Inter Channel Interference (IChI). Bit Error Rate (BER) investigation is carried out over different link distances under acoustic Line of Sight (LOS). The utilization of Zero Forcing (ZF) and Vertical-Bell Laboratories Layered Space-Time (VBLAST) equalizers, which estimates the transmitted data proves a success of removing Inter Symbol Interference (ISI). The ISI caused due to multipath effect and scattering in UWAC can be reduced by iterative process considered in VBLAST. A study is made on how the distance between the transmitter and the receiver and the Doppler Effect has its impact on the performance of the system.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 2; 331-337
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Particle-inflow-gun-mediated genetic transformation of buffel grass [Cenchrus ciliaris L.]: optimizing biological and physical parameters
    Autorzy:
    Bhat, V
    Dalton, S.J.
    Kumar, S.
    Bhat, B.V.
    Gupta, M.G.
    Morris, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048302.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    buffel grass
    promoter
    genetic transformation
    physical parameter
    Cenchrus ciliaris
    biological parameter
    grass
    biotechnology
    Źródło:
    Journal of Applied Genetics; 2001, 42, 4; 405-412
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plant community characteristics and soil status in different land use systems in Dimapur district, Nagaland, India
    Autorzy:
    Singh, S.K.
    Kumar, K.W.
    Aier, B.
    Kanduri, V.P.
    Ahirwar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/45630.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Badawczy Leśnictwa
    Źródło:
    Leśne Prace Badawcze; 2012, 73, 4
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Passerine birds supporting cross pollination in Erythrina stricta Roxb.
    Autorzy:
    Khanduri, V.P.
    Kumar, K.S.
    Sharma, C.M.
    Riyal, M.K.
    Kar, K.
    Singh, B.
    Sukumaran, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078260.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Ornithophily
    pollination
    mating system
    geitonogamy
    pollen grains
    Opis:
    Erythina stricta is an ecologically important tree species in the rainforests of India and its nectar within the flowers contributes to birds’ diet and survival. Reports on the pollination of this species have not been published so far. We therefore explore the reproductive system of this tree species which has great significance to its ecosystem. Birds have an important role in the reproduction of trees through pollination particularly in tropical areas where reproductive success mostly depends on animal pollinator interactions. Study of visitation and nectar feeding behaviour of birds alongwith breeding system assessment of Erythina stricta. Birds visiting and foraging behaviour was observed during Erythrina stricta flowering season in an indian tropical rainforest. Reproductive system was assessed through controlled pollination experiments. Thirteen bird species were recorded visiting and foraging nectar from the flowers of Erythrina stricta. The maximum numbers of visits recorded were from the Red-vented Bulbul (Pycnonotus cafer, Pycnonotidae). The nectar feeding birds were, either (i) potential pollinator with long bills (e.g. Pycnonotus spp., Chloropsis aurifrons, and Dicrurus spp.) or (ii) nectar robbers with comparatively shorter bills (e.g. Zosterops palpebrosa, Stachyris ruficeps, Macronous gularis, Heterophasia glaciris). Controlled pollination experiments revealed high degree of cross pollination (xenogamy) and self-incompatibility in E. stricta. Birds were more frequent in early mornings and their foraging activity was also observed during evening hours; the frequency however, declined with respect to nectar availability. Long corolla tubes of E. stricta could restrict access to nectar collecting bees
    Źródło:
    Dendrobiology; 2021, 85; 117-126
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of services and referrals through dental outreach programs in rural areas of India. A two year study
    Autorzy:
    Asawa, K.
    Bhanushali, N.V.
    Tak, M.
    Kumar, D.R.V.
    Rahim, M.F.B.A.
    Alshahran, O.A.
    Divakar, D.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/877920.pdf
    Data publikacji:
    2015
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    motivation
    utilization
    service
    referral
    dental outreach programme
    rural area
    rural population
    India
    Opis:
    Background. Oral health care services are often sparse and inconsistent in India therefore it is often difficult for poor people to get access to the oral health care services. The approach by dental institutions with the help of community outreach programs is a step ahead in overcoming this situation. Objectives. The study was conducted to evaluate the number of patients, disease pattern and the services provided in the outreach programmes and also effectiveness of patient referral. Methods. A retrospective study was conducted and the data were obtained from records of outreach programs conducted, in last 2 years by Pacific Dental College and Hospital. The data were analysed using descriptive statistics for the computation of percentages Chi-square test was applied to know the association of effectiveness of referral with age and gender. Confidence level and level of significance was fixed at 95% and 5% respectively. Results. A total of 22982 individuals in the age group of 4-80 years attended the outreach program. Dental caries (42.3%), periodontal diseases (63.2-69.0%) and dental fluorosis (33.7-35.0%) were commonly observed diseases. Effectiveness of referral was significantly high among the middle age adults and females (P<0.05). The effectiveness of referral was highly improved in 2013 after establishment of certain guidelines and strategies. Conclusion. The approaches by dental institutions with the help of community outreach programs can spread awareness and disseminate treatment and thereby enhancing access to care and eliminating access to care within the rural communities.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2015, 66, 3
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Thermal Comfort Properties of Different Kinds of Polyester Knitted Fabrics
    Badanie właściwości komfortu termicznego różnych rodzajów dzianin poliestrowych
    Autorzy:
    Mohapatra, Shradhanjali
    Vidya, T.
    Kumar, D. Vasanth
    Rajwin, A. Jebastin
    Babu, V. Ramesh
    Prakash, C.
    Shah, B. Anas
    Roy, Reetuparna
    Powiązania:
    https://bibliotekanauki.pl/articles/2056314.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    comfort
    knitted fabric
    microdenier polyester
    polyester
    single jersey
    thermal comfort
    komfort
    dzianina
    poliester microdenier
    poliester
    komfort termiczny
    Opis:
    This research focused on the thermal comfort behaviour of polyester with respect to the type of yarn (spun, micro denier, continuous filament and hollow), linear density of the yarn (111 and 166 dtex), and the loop length of knitted fabric (0.25, 0.27 and 0.29 cm).The air permeability of continuous filament yarn fabric and micro denier yarn knitted fabrics was noted to be higher than that of spun yarn knitted fabrics. 111 dtex micro denier yarn fabric has the highest air permeability and 111 dtex spun yarn fabric the lowest air permeability value among all the other fabric samples. Comparatively, coarser spun yarn fabric has lower air permeability characteristics than finer microdenier fabric.The water permeability of the fabric shows a significant difference between the spun yarn, continuous filament yarn and Micro denier yarn knitted fabrics and between the linear density of the yarn. The water vapour permeability of spun yarn of 166 dtex single jersey fabric is higher, while the water vapour permeability of continuous filament yarn fabric of 166 dtex is lower. The thermal conductivity value is high for continuous filament polyester fabric of 100 D and low for microdenier polyester fabric of 166 dtex. Based on the statistical analysis, it is clearly shown that there are significant differences between the three different polyester yarn fabrics of two different denier of the same fabric. Furthermore, the count and different polyester yarn affect the comfort properties of single jersey fabrics.
    Badania koncentrowały się na zachowaniu komfortu cieplnego poliestru w odniesieniu do rodzaju przędzy, gęstości liniowej przędzy (111 dtex i 166 dtex) oraz długości pętelki dzianiny (0,25 cm, 0,27 cm oraz 0,29 cm). Zbadano właściwości wytworzonych dzianin takie jak: przepuszczalność powietrza, wody, pary wodnej oraz przewodność cieplną, a wyniki poddano analizie statystycznej.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2021, 5 (149); 50--55
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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