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    Wyświetlanie 1-21 z 21
    Tytuł:
    Hall effect on thermal instability of viscoelastic dusty fluid in porous medium
    Autorzy:
    Singh, M.
    Gupta, R. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/265280.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    niestabilność termiczna
    płyn lepkosprężysty
    porowatość
    thermal instability
    Rivlin-Ericksen viscoelastic fluid
    suspended particles
    Hall current effect
    porous medium
    Opis:
    The effect of Hall currents and suspended dusty particles on the hydromagnetic stability of a compressible, electrically conducting Rivlin-Ericksen elastico viscous fluid in a porous medium is considered. Following the linearized stability theory and normal mode analysis the dispersion relation is obtained. For the case of stationary convection, Hall currents and suspended particles are found to have destabilizing effects whereas compressibility and magnetic field have stabilizing effects on the system. The medium permeability, however, has stabilizing and destabilizing effects on thermal instability in contrast to its destabilizing effect in the absence of the magnetic field. The critical Rayleigh numbers and the wave numbers of the associated disturbances for the onset of instability as stationary convection are obtained and the behavior of various parameters on critical thermal Rayleigh numbers are depicted graphically. The magnetic field, Hall currents and viscoelasticity parameter are found to introduce oscillatory modes in the systems, which did not exist in the absence of these parameters.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 871-886
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On thermosolutal convection in presence of compressible fluid with fine dust
    Autorzy:
    Singh, M.
    Gupta, R. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/955304.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    płyn lepkosprężysty
    ściśliwość
    płyn warstwowy
    Rivlin-Ericksen elastico-viscous fluid
    compressible and fine dust
    Opis:
    A layer of a Rivlin-Ericksen elastico-viscous fluid heated and soluted from below in the presence of compressibility and suspended particles (fine dust) effect is considered. For stationary convection, the Rivlin- Ericksen, elastico-viscous fluid behaves like a Newtonian fluid. The oscillatory modes are introduced due to the presence of a stable solute gradient, suspended particles destabilize the system whereas the stable solute gradient has a stabilizing effect on the system and the effect of compressibility is to postpone the onset of thermosolutal convection. The stable solute gradient and compressibility postpone the onset of convection, whereas the suspended particles hasten the onset of convection. The stable solute gradient introduces oscillatory modes in the systems which were non-existent in its absence.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2014, 19, 1; 133-143
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Branch and bound algorithm for discrete multi- level linear fractional programming problem
    Autorzy:
    Arora, R.
    Gupta, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/406478.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    linear fractional programming problem
    bilevel programming
    multilevel programming
    discrete variables
    integer solution
    branch and bound cut
    programowanie dwustopniowe
    programowanie wielopoziomowe
    zmienne dyskretne
    Opis:
    An algorithm is proposed to find an integer solution for bilevel linear fractional programming problem with discrete variables. The method develops a cut that removes the integer solutions which are not bilevel feasible. The proposed method is extended from bilevel to multilevel linear fractional programming problems with discrete variables. The solution procedure for both the algorithms is elucidated in the paper.
    Źródło:
    Operations Research and Decisions; 2018, 28, 2; 5-21
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fuzzy goal programming technique for multi-objective indefinite quadratic bilevel programming problem
    Autorzy:
    Arora, R.
    Gupta, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1403683.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bilevel programming
    indefinite quadratic programming
    multi-objective programming
    pay-off matrix
    Taylor series approximation
    LINGO 17.0
    Opis:
    Bilevel programming problem is a non-convex two stage decision making process in which the constraint region of upper level is determined by the lower level problem. In this paper, a multi-objective indefinite quadratic bilevel programming problem (MOIQBP) is presented. The defined problem (MOIQBP) has multi-objective functions at both the levels. The followers are independent at the lower level. A fuzzy goal programming methodology is employed which minimizes the sum of the negative deviational variables of both the levels to obtain highest membership value of each of the fuzzy goal. The membership function for the objective functions at each level is defined. As these membership functions are quadratic they are linearized by Taylor series approximation. The membership function for the decision variables at both levels is also determined. The individual optimal solution of objective functions at each level is used for formulating an integrated pay-off matrix. The aspiration levels for the decision makers are ascertained from this matrix. An algorithm is developed to obtain a compromise optimal solution for (MOIQBP). A numerical example is exhibited to evince the algorithm. The computing software LINGO 17.0 has been used for solving this problem.
    Źródło:
    Archives of Control Sciences; 2020, 30, 4; 683-699
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Safety and Health in the Tea Industry of Barak Valley, Assam: A Fuzzy Logic Approach
    Autorzy:
    Gupta, R.
    Dey, S. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/90279.pdf
    Data publikacji:
    2013
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    vagueness
    fuzziness
    safety
    fuzzy set
    model rozmyty
    system bezpieczeństwa
    ochrona zdrowia
    Opis:
    Traditional safety and health system measurement procedures, practiced in various industries produce qualitative results with a degree of uncertainty. This paper presents a fuzzy-logic-based approach to developing a fuzzy model for assessing the safety and health status in the tea industry. For this, the overall safety and health status at a tea estate has been considered as a function of 4 inputs: occupational safety, occupational health, behavioral safety and competency. A set of fuzzy rules based on expert human judgment has been used to correlate different fuzzy inputs and output. Fuzzy set operations are used to calculate the safety and health status of the tea industry. Application of the developed model at a tea estate showed that the safety and health status belongs to the fuzzy class of good with a crisp value of 7.2.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2013, 19, 4; 613-621
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal LQR controller in CSC based STATCOM using GA and PSO
    Autorzy:
    Gupta, S.
    Tripathi, R. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/140927.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CSC
    FACTS
    AI techniques
    LQR
    STATCOM
    Opis:
    The static synchronous compensator (STATCOM) is the multipurpose FACTS device with the multiple input and multiple output system for the enhancement of its dynamic performance in power system. Based on artificial intelligence (AI) optimization technique, a novel controller is proposed for CSC based STATCOM. In this paper, the CSC based STATCOM is controlled by the LQR. But the best constant values for LQR controller's parameters are obtained laboriously through trial and error method, although time consuming. So the goal of this paper is to investigate the ability of AI techniques such as genetic algorithm (GA) and particle swarm optimization (PSO) methods to search the best values of LQR controller's parameters in a very short time with the desired criterion for the test system. Performances of the GA, PSO & ABC based LQR controllers are also compared. Applicability of the proposed scheme is demonstrated through simulation in MATLAB and the simulation results are shown an improvement in the input-output response of CSC-STATCOM.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 3; 469-487
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marangoni convection in a relatively hotter or cooler liquid layer with free boundaries
    Autorzy:
    Gupta, A. K.
    Shandil, R. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/265233.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    napięcie powierzchniowe
    konwekcja
    przewodzenie
    stabilność liniowa
    surface tension
    convection
    conducting
    linear stability
    Opis:
    In this paper, we study the onset of cellular convection in a horizontal fluid layer heated from below, with a free-slip boundary condition at the bottom when the driving mechanism is surface tension at the upper free surface, in the light of the modified analysis of Banerjee et al. (Jour. Math. & Phys. Sci., 1983, 17, 603). This leads to a formulation of the problem which depends upon whether the liquid layer is relatively hotter or cooler. It is found that the phenomenon of surface tension driven instability problems should not only depend upon the Marangoni number which is proportional to the maintained temperature differences across the layer but also upon another parameter that arises due to variation in the specific heat at constant volume on account of the variations in temperature. Numerical results are obtained for the problem wherein the lower free boundary is perfectly thermally conducting.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 581-588
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using Web Services to enhance Geographic Information Systems
    Autorzy:
    Ladner, R.
    Petry, F.
    Warner, E.
    Gupta, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/970472.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    ontologia
    usługa WWW
    dane przestrzenne
    system informacji przestrzennej
    ontology
    web services
    spatial data
    GIS
    geographic information systems
    Opis:
    In this paper we describe an approach to the extension of geographic information systems to take advantage of the continuing development of capabilities of the Semantic Web. This is presented in the context of a portal based Geospatial Information Database (GIDB™), an object-oriented spatial database capable of storing multiple data types from multiple sources. We have developed our approach for a specific domain, spatially oriented, meteorological and oceanographic, but this can clearly be applied to other Spatial data domains. Finally we illustrate the use of the ontology development system based on Generative Sublanguage Ontologies (GSO), a type of linguistic ontology inspired by the Generative Lexicon Theory, to develop effective domain ontologies.
    Źródło:
    Control and Cybernetics; 2006, 35, 1; 29-46
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    To predict human Biomarker for the obesity using mouse homologous expression data at different theiler stages
    Autorzy:
    Kumar, A.
    Puri, R.
    Gupta, K.
    Pal, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11371.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    There are numerous genetic factors like MC4R (Melanocortin-4 receptor), POMC (Proopiomelanocortin), SIM1 (Single Minded Gene) etc. important in obesity, which can be used as biomarker. But more reliable diagnostic markers are the need for today, along with new therapeutic strategies that target specific molecules in the disease pathways. As in mouse and human genes, where mutations in one or both species are associated with some phenotypic characteristics as observed in human disease. In molecular mechanisms of development, differentiation, and disease gene expression data provide crucial insights. Up-regulation and down-regulation of selective genes can have major effects on diet-induced obesity, but there is little or no effect when animals are fed a low-fat diet. In present study we have studied the gene expression data of mouse at different theiler stages using GXD BioMart. The interacting partners and pathway of the genes that are already used as biomarker in mouse as well as in humans have been studied. A gene NPY1R (Neuropeptide Y1 receptor) was taken as common after STRING and KEGG results on the basis of biochemical pathways and interactions similar to MC4R. Our present work focuses on comparative genomics and proteomics analysis of NPY1R, which has led to identification of biomarker by comparing it with already known MC4R human and mouse biomarker. It has been concluded that both the proteins are structurally and functionally similar.
    Źródło:
    International Letters of Natural Sciences; 2015, 45
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perception of dental practitioners regarding the use of antioxidants in oral health
    Autorzy:
    Randhawa, R.K.
    Gupta, N.
    Bansal, M.
    Arora, V.
    Gupta, P.
    Thakar, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/875829.pdf
    Data publikacji:
    2016
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    perception
    dental health
    antioxidant
    free radical
    mouth cancer
    oral health
    Opis:
    Background. Free radicals play a key role in the development of several pathological conditions. Therefore, antioxidants (AOs) are the first line of defense against free radical damage and are critical for maintaining optimum health and wellbeing. Objectives: To assess the perception of dental practitioners regarding use of antioxidants in oral health. Method. A cross-sectional questionnaire study was conducted among 296 dental practitioners in Tricity (Chandigarh, Mohali, Panchkula, India). A self-structured close-ended questionnaire was used to assess the perception of dentists regarding the use of antioxidants in their patients. It consisted of 12 questions with dichotomous response and five point likert scale ranging from strongly agree to strongly disagree. Descriptive statistics were used to summarize the data, followed by the Chi-square test to check significant differences between the responses. Correlation between responses were analysed through the Spearman’s rank correlation. Statistical analysis was done using Statistical Package for Social Sciences version 20 (Illinois, Chicago, USA). Results. A statistically significant difference was observed between genders, with females 181 (61%) having more knowledge than males 115 (39%) regarding the use of antioxidants in their clinical practice. It has been found that dental professionals in academics prescribes more antioxidants to their patients than the private practitioners. Postgraduates 76 (77.6%) had a higher level of knowledge than graduates 86 (43%). Conclusions. Knowledge about antioxidants should be highlighted in the health sciences curriculum. It is recommended to expand the use of antioxidants in oral health to bring down the burden of chronic diseases like periodontitis and catastrophic diseases like precancerous lesions and oral cancer.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2016, 67, 3
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of inertia in the steady state pressurised flow of a non-Newtonian fluid between two curvilinear surfaces of revolution: Rabinowitsch fluid model
    Autorzy:
    Singh, U. P.
    Gupta, R.S.
    Kapur, V.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/185617.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    efekt bezwładności
    łożysko krzywoliniowe
    zewnętrzny przepływ ciśnieniowy
    curvilinear bearings
    Rabinowitsch fluid model
    inertia effect
    externally pressurized flow
    Opis:
    In many practical situations fluids are normally blended with additives (viscosity index improvers, viscosity thickeners, viscosity thinners) due to which they show pseudoplastic and dilatant nature which can be modelled as cubic stress model (Rabinowitsch model). The cubic stress model for pseudoplastic fluids is adopted because Wada and Hayashi have shown that the theoretical results with this model are in good agreement with the experimental results. The present theoretical analysis is to investigate the pseudoplastic effect along with the effect of rotational inertia on the pressure distribution, frictional torque and fluid flow rate of externally pressurised flow in narrow clearance between two curvilinear surfaces of revolution. The expression for pressure has been derived using energy integral approach. To analyse and discuss the effects of pseudoplasticity and fluid inertia on the pressure distribution, fluid flow rate and frictional torque, the examples of externally pressurised flow in the clearance between parallel disks and concentric spherical surfaces have been considered.
    Źródło:
    Chemical and Process Engineering; 2011, 32, 4; 333-349
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maximizing hybrid seedlings recovery and early identification of highly polyembryonic acid lime (Citrus aurantifolia Swing.) × lemon (Citrus limon Burm.) hybrids using SSR markers
    Autorzy:
    Dubey, A.K.
    Gupta, A.
    Sharma, R.M.
    Sharma, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1077768.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Ogrodnictwa
    Tematy:
    hybrid seed
    germination
    seedling
    Citrus aurantifolia
    citrus fruit
    citrus bacterial canker
    Xanthomonas axonopodis pv. citri
    SSR marker
    Opis:
    Nucellar embryony is the major obstacle in getting hybrid seedlings in interspecific crosses in citrus. Hence, the present study was conducted to standardize embryo age, culture media for maximizing germination, and subsequent identification of simple sequence repeat (SSR) markers to differentiate the hybrids. A factorial experiment was conducted with three embryo ages – 80–90, 110–120, and 130–140 days after pollination (DAP). The germination of the rescued immature embryos of acid lime × lemon crosses was initiated on three different growing media. The fruits harvested at 130–140 and 80–90 DAP had a higher number of functional seeds (90%). Older embryos (130–140 DAP) and middle-aged embryos (110–120 DAP) germinated in 100% on Murashige and Skoog (MS) medium supplemented with 500 mg·l -1 malt extract, 1.5 mg·l-1 gibberellic acid (GA3), and 0.02 mg·l-1 naphthalene acetic acid (NAA). MS medium supplemented with 500 mg·l-1 malt extract proved better for the germination of embryos taken at 80–90 DAP. Plantlet survival was the highest in younger embryos (80–90 DAP) cultured on MS basal medium (84.21%) and the lowest in older embryos cultured on MS medium supplemented with 500 mg·l-1 malt extract plus 1.5 mg·l-1 GA3 and 0.02 mg·l-1 NAA. The seedlings obtained from the culture 80–90 DAP had the highest root length (4.9 mm) and shoot length (5.3 mm) at 60 days after inoculation (DAI) on the above medium. SSR marker analysis revealed that CCSM-4 and CAC-33 markers expressed polymorphism between female and male parents, proving their ability to identify the hybrids of ‘Kagzi’ acid lime × ‘Konkan Seedless’ lemon.
    Źródło:
    Journal of Horticultural Research; 2020, 28, 2; 43-52
    2300-5009
    Pojawia się w:
    Journal of Horticultural Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Endodontic treatment of immature tooth - a challenge
    Autorzy:
    Gupta, S.
    Sodhi, S.P..
    Brar, G.K.
    Bansal, R.N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2097446.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    mmature tooth
    root apex
    endodontic treatment
    open apex
    MTA
    regenerative endodontics
    Opis:
    Root apex is an area of primary importance for an endodontist. When a tooth erupts in the oral cavity the apical foramen undergoes anatomical changes with age. Root development is completed and the root apex is closed three years after eruption of the tooth. Endodontic practice is influenced to a great extent by different stages of root development and the type of tissue present within the roots. Open apices pose a challenging problem for the success of root canal treatment because they favour the extravasation of the irrigating solution and/or sealer into periradicular tissues, thus jeopardizing apical healing. Regenerative endodontics (revascularization/pulpal regeneration) is a straightforward approach accomplished with currently available instruments and materials. A literature review suggests that Mineral Tri oxide Aggregate (MTA) is the most favourable and recommendable material for single-visit apexification, even in cases when regenerative endodontics cannot be performed. A plus point of MTA is its biocompatibility and hermetic apical seal with no micro-leakage. It should be considered as an effective alternate for treating immature teeth with necrotic pulps. Treatment of a tooth with open apex poses multiple challenges. However, it is not easy to decide which material should be used: Calcium hydroxide, Mineral Tri oxide Aggregate, Biodentine, Platlet Rich Fibrin (PRF), or White Portland Cement (WPC). The choice of treatment regimen depends on several factors, e.g. individual cases, experience of the operator, familiarity with handling various materials, and patient’s availability for follow-up appointments. This review highlights various challenges in the treatment of open apex, with emphasis on MTA compared with other materials.
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2020, 14, 3; 73-79
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ashwagandha (Withania somnifera) – a herb with versatile medicinal properties empowering human physical and mental health
    Autorzy:
    Gupta, S.
    Bansal, R.N.
    Sodhi, S.P.S.
    Brar, G.K.
    Molhotra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2098530.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    ashwagandha
    Withania somnifera
    herb
    medicinal property
    empowerment
    physical health
    mental health
    Opis:
    Introduction. Ashwagandha is a rasayana of Ayurveda system of medicines. It is a real potent regenerative tonic possessing several pharmacological properties like neuro-protective, anti-stress, anti-arthritic, antitumor, analgesic and anti-inflammatory. Objective. To illustrate applications and limitations of Ashwagandha in detail. Materials and method. Data was collected from various review and research publications. Literature review involved animal studies and human studies. Emphasis was given on versatility of medicinal properties. Results. Ashwagandha plays an important role in improving quality of life and performance at work and possess several pharmacologic actions. Each part of this herb i.e. from root to fruit possess medicinal properties. Conclusions. Ashwagandha possesses wide variety of therapeutic uses in each and every system of human body. The plant has also been widely studied for its various pharmacological activities like antioxidant, anxiolytic, adaptogen, memory enhancing, antiparkinsonian, antiinflammatory, antitumor properties. Irrespective of such large network of benefits this herb has some limitations of use in certain situations.
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2021, 15, 3; 129-133
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is complementary and alternative medicine effective in job satisfaction among dentists with musculoskeletal disorders? A cross sectional study
    Czy medycyna komplementarna i alternatywna ma wpływ na satysfakcję zawodową dentystów z zaburzeniami mięśniowo-szkieletowymi? Badanie przekrojowe
    Autorzy:
    Gupta, Devanand
    Bhaskar, Dara J.
    Gupta, Rajendra K.
    Jain, Ankita
    Yadav, Priyanka
    Dalai, Deepak R.
    Singh, Rajeshwar
    Singh, Nisha
    Chaudhary, Varunjeet
    Singh, Ankit
    Yadav, Ankit
    Karim, Bushra
    Powiązania:
    https://bibliotekanauki.pl/articles/2166243.pdf
    Data publikacji:
    2014-10-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    medycyna komplementarna i alternatywna
    dentysta
    zaburzenia mięśniowo-szkieletowe
    complementary and alternative medicine
    dentist
    musculoskeletal disorders
    Opis:
    Background: Musculoskeletal disorders have serious impact on the profession of dentistry. There is common occurrence of pain due to incorrect posture in dental professionals. Complementary and alternative medicine (CAM) therapies may cast a new light on preventing and intercepting musculoskeletal disorders (MSD). An epidemiological study was conducted in an effort to contribute to the prevention of musculoskeletal disorders in dentistry. The purpose of this study was to determine the prevalence of MSD at dentists using CAM as a treatment and preventive modality for MSD and to compare job/career satisfaction between dentists who use CAM and conventional therapy (CT). Material and Methods: Dentists registered in Uttrakhand state, India, under the Dental Council of India and registered members of the Indian Dental Association, Uttrakhand branch (N = 1496) were surveyed. Statistical analysis was conducted using SPSS 17. Results: A response rate of 84% (N = 1257) was obtained, revealing that 90% (N = 1131) had the problem of MSD. Seventy three percentage (N = 826) of dentists with MSD reported the use of CAM and CT. Complementary and alternative medicine users reported greater overall health (72.7% vs. 51%, p < 0.001), job satisfaction (61.2% vs. 35%, p < 0.001) and work efficiency compared to CT users. Conclusions: Complementary and alternative medicine therapies may improve quality of life, reduce work interruption and enhance job satisfaction for dentists who suffers from MSD. Through the course of their studies, dentists should be equipped with knowledge on ergonomics and CAM therapies, such as yoga and others, to help them prevent musculoskeletal disorders more effectively. Med Pr 2014;65(3):317–323
    Wstęp: Zaburzenia mięśniowo-szkieletowe znacząco wpływają na wykonywanie zawodu przez lekarzy dentystów. W tej grupie zawodowej obserwuje się powszechne występowanie bólu z powodu nieprawidłowej postawy ciała. Terapie z zakresu medycyny komplementarnej i alternatywnej (complementary and alternative medicine - CAM) mogą rzucić nowe światło na zapobieganie zaburzeniom mięśniowo-szkieletowym (musculoskeletal disorders - MSD). Celem badania było ustalenie, czy w przypadku MSD dentyści korzystają z medycyny alternatywnej. Porównano także satysfakcję zawodową dentystów, którzy stosują terapie CAM i tych korzystających z terapii konwencjonalnej. Materiał i metody: W badaniu wzięli udział dentyści zarejestrowani w regionie Uttrakhand (Indie) w Radzie Dentystycznej Indii i będący członkami Indyjskiego Towarzystwa Dentystycznego (oddział Uttrakhand) (N = 1496). Analizy statystyczne przeprowadzono za pomocą pakietu SPSS 17. Wyniki: Wskaźnik odpowiedzi wyniósł 84% (N = 1257). Aż 90% (N = 1131) respondentów cierpiało z powodu MSD. Korzystanie z CAM i terapii konwencjonalnej zgłosiło 73% (N = 826) dentystów biorących udział w badaniu, u których występowały MSD. Osoby stosujące CAM w porównaniu z osobami leczącymi się konwencjonalnie zgłaszały lepszy ogólny stan zdrowia (72,7% vs 51%, p < 0,001), wyższy poziom satysfakcji zawodowej (61,2% vs 35%, p < 0,001) i były w stanie pracować w takim wymiarze czasu, w jakim chciały (56,8% vs. 67%, p < 0,001) Wnioski: Terapie CAM mogą poprawić jakość życia, zredukować przerwy w pracy i zwiększyć satysfakcję zawodową u dentystów cierpiących na MSD. Już na etapie studiów należy przekazać dentystom wiedzę z zakresu ergonomii oraz terapii CAM, żeby potrafili skuteczniej zapobiegać wystąpieniu zaburzeń mięśniowo-szkieletowych. Med.Pr. 2014;65(3):317–323
    Źródło:
    Medycyna Pracy; 2014, 65, 3; 317-323
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative evaluation of inversion approaches of the radiative transfer model for estimation of crop biophysical parameters
    Autorzy:
    Mridha, N.
    Sahoo, R.N.
    Sehgal, V.K.
    Krishna, G.
    Pargal, S.
    Pradhan, S.
    Gupta, V.K.
    Nagesh Kumar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/25984.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    The inversion of canopy reflectance models is widely used for the retrieval of vegetation properties from remote sensing. This study evaluates the retrieval of soybean biophysical variables of leaf area index, leaf chlorophyll content, canopy chlorophyll content, and equivalent leaf water thickness from proximal reflectance data integrated broad bands corresponding to moderate resolution imaging spectroradiometer, thematic mapper, and linear imaging self scanning sensors through inversion of the canopy radiative transfer model, PROSAIL. Three different inversion approaches namely the look-up table, genetic algorithm, and artificial neural network were used and performances were evaluated. Application of the genetic algorithm for crop parameter retrieval is a new attempt among the variety of optimization problems in remote sensing which have been successfully demonstrated in the present study. Its performance was as good as that of the look-up table approach and the artificial neural network was a poor performer. The general order of estimation accuracy for para-meters irrespective of inversion approaches was leaf area index > canopy chlorophyll content > leaf chlorophyll content > equivalentleaf water thickness. Performance of inversion was comparable for broadband reflectances of all three sensors in the optical region with insignificant differences in estimation accuracy among them.
    Źródło:
    International Agrophysics; 2015, 29, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An extension of line spring model for vibration analysis of thin isotropic plate containing multiple part-through cracks: an analytical approach
    Autorzy:
    Jain, N. K.
    Gupta, A.
    Salhotra, R.
    Rawani, A. M.
    Soni, S.
    Mishra, A.
    Joshi, P. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/128046.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    multiple cracks
    Line Spring Model
    vibration
    partial crack
    pęknięcie wielokrotne
    sprężyna liniowa
    drgania
    pęknięcie częściowe
    Opis:
    In the present study, the effect of multiple part-through cracks on the vibration characteristics of thin isotropic rectangular plate is presented. The proposed analytical model is developed using Kirchhoff’s classical plate theory and the crack terms are formulated using the simplified Line Spring Model (LSM). The application of Berger's formulation helps to transform the derived governing equation in the form of well known Duffing equation with cubic nonlinearities and then the solution for final governing equation is obtained using Galerkin's method for two different boundary conditions. The fundamental frequency of the plate as affected by the number of cracks, cracks length, cracks orientation, and plate aspect ratio for different boundary condition is presented. It is found that the results obtained for natural frequencies are maximally affected by number of cracks, crack length and orientations.
    Źródło:
    Vibrations in Physical Systems; 2018, 29; 1-25
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrated biostratigraphy of the Jurassic strata of the Wagad Uplift, Kachchh, western India
    Autorzy:
    Rai, J.
    Garg, S.
    Gupta, M.
    Singh, A.
    Pandey, D. K.
    Fürsich, F. T.
    Alberti, M.
    Garg, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077328.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Jurassic
    calcareous nannofossils
    dinoflagellate cysts
    ammonites
    Oxfordian
    Kimmeridgian
    Wagad Uplift
    Kachchh
    jura
    wapienie
    bruzdnice
    amonity
    Oksford
    Kimeryd
    Opis:
    An integrated study based on calcareous nannofossils, organic-walled dinoflagellate cysts, and ammonites from the Washtawa and Kanthkot formations of the Wagad Uplift have allowed a detailed documentation of the stratigraphic position of these formations within the Oxfordian and Kimmeridgian sediments of the Kachchh Basin, western India. The nannofossil assemblages from the lower part of the Nara Shale Member exposed in the Nara and Washtawa domes, the Kanthkot Ammonite Beds along the Trambau River section, and the Patasar Shale Member exposed along the Trambau River section and the Patasar Tank section in the eastern part of the Wagad Uplift belong to the NJ 14 Cyclagelosphaera margerelli Zone of the Early Oxfordian, the NJ 15a Lotharingius sigillatus Zone of the Middle Oxfordian, and the NJ 15b Cretarhabdus conicus of Early Kimmeridgian age, respectively. Zonation schemes, based on calcareous nannofossils, dinoflagellate cysts, and ammonites were calibrated highlighting their biostratigraphic potential. These studies may represent a reference biochronology for Oxfordian–Kimmeridgian age strata applicable to the Tethyan realm of which India was a part during Late Jurassic times.
    Źródło:
    Volumina Jurassica; 2015, 13, 2; 55--80
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Temperature and Pressure Dependence of the Free Volume in Fluoroelastomers from PALS and PVT Experiments
    Autorzy:
    Dlubek, G.
    Sen Gupta, A.
    Wawryszczuk, J.
    Kilburn, D.
    Pionteck, J.
    Krause-Rehberg, R.
    Goworek, T.
    Alam, M. A.
    Kaspar, H.
    Lochhaas, K. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2042202.pdf
    Data publikacji:
    2005-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.41.+e
    78.70.-g
    Opis:
    Positron lifetime and pressure-volume-temperature experiments were performed as function of T (100-485 K) and P (10$\text{}^{-5}$ Pa-500 MPa) on a fluoroelastomer. From positron annihilation lifetime spectroscopy, analyzed with LT9.0 assuming a dispersion in the e$\text{}^{+}$ (τ$\text{}_{2}$) and o-Ps (τ$\text{}_{3}$) lifetime, the mean, 〈v$\text{}_{h}$〉, and the width (standard deviation), σ$\text{}_{h}$, of the hole size distribution were calculated. The pressure-volume-temperature data were analyzed using the Simha-Somcynsky hole-lattice theory to estimate the specific hole free volume V$\text{}_{f}$. From a comparison of V$\text{}_{f}$ with 〈v$\text{}_{h}$〉 the specific hole number, N'$\text{}_{h}$, is estimated. The data from thermal expansion and pressure experiments show complete agreement when taking into account the compressibility of the occupied volume.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 4; 685-689
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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