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    Tytuł:
    Control of a redundant 7DOF upper-limb power-assist exoskeleton robot
    Autorzy:
    Hayashi, Y.
    Kiguchi, K.
    Dubey, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/91596.pdf
    Data publikacji:
    2011
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    power-assist robot
    upper limb
    power-assist
    7DOF
    position
    orientation
    pseudo-inverse matrix
    redundancy
    optimal control
    Opis:
    Many kinds of power-assist robots have been developed in order to assist daily activities or rehabilitation of the elderly or physically weak persons. Upper-limb power-assist robots are important to assist in many daily life activities such as eating, drinking, etc.. A human upper-limb has 7 degrees of freedom to achieve various tasks dexterously. Therefore, to assist all upper-limb joint motions of a human, the upper-limb power-assist robot is required to have 7DOF. To achieve a desired task, a person moves the hand to the desired position and orientation and/or applies certain amount of force to the target. Therefore, it is important that the upper-limb power-assist robots help control the hand position/ orientation or hand force of the user. However, the hand position/orientation or hand force is 6-dimensional vector, so the 7DOF upper-limb power-assist robot has a redundancy and in general, a pseudo-inverse matrix is used in the control. In this paper, an optimal control method is proposed to deal with the redundancy of the upper-limb power-assist exoskeleton robot considering comfortable motion of the user. The motion intention and the comfort of the user are taken into account in the pro-posed method. The effectiveness of the proposed method was evaluated by the experiments.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2011, 1, 3; 207-214
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of innovative supply chain practices and total quality management (TQM) on performance of Indian cement manufacturing firms : an empirical study
    Rola innowacyjnych praktyk w łańcuchu dostaw i zarządzania przez jakość a wydajność indyjskich przedsiębiorstw wytwarzających cement : badanie doświadczalne
    Autorzy:
    Dubey, R.
    Chakrabarty, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/406137.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    innowacyjność łańcucha dostaw
    łańcuch dostaw
    TQM
    zarządzanie przez jakość
    przemysł cementowy
    supply chain
    supply chain innovation
    Total Quality Management
    cement industry
    Opis:
    In extremely turbulent situation when world faces major economic crisis then particularly Indian manufacturing sector had major set back. In such situation some of Indian cement sector has demonstrated healthy performance through innovative supply chain practices. In this study author conducted an empirical study to understand how innovative practices in supply chain in combination with TQM (Total Quality Management) can help firm to reduce cost and improve customer satisfaction which in turn reflect high profitability and better market share. Out of five proposed model four model is accepted and fifth model is not supported by regression analysis. The findings clearly reveal that Indian cement Industry is quite in nascent stage to adopt Innovative supply chain practices.
    W wyjątkowo niespokojnych czasach, kiedy świat stawia czoła poważnemu kryzysowi gospodarczemu, szczególnie indyjski sektor wytwórczy doświadczył poważnego zahamowania. Pomimo takiej sytuacji, część indyjskiego sekora cementu wykazała dobrą wydajność dzięki zastosowaniu innowacyjnych praktyk w łańcuchu dostaw. W nieniejszej pracy autor przeprowadza badanie w celu zrozumienia jak innowacyjne praktyki w łańcuchu dostaw w połączeniu z zarządzaniem przez jakość (TQM) może pomóc przedsiębiorstwu zredukować koszty i poprawić satysfakcję klienta, co z kolei znajduje odzwierciedlenie w wysokiej rentowności i większym udziale w rynku. Z pięciu zaproponowanych modeli cztery zostały zaakceptowane, a piąty model nie jest wspierany przez analizę regresji. Wyniki jasno wykazują, że przemysł indyjskiego cementu znajduje się w stanie sprzyjającym zastosowaniu innowacyjnych praktyk w łańcuchu dostaw.
    Źródło:
    Polish Journal of Management Studies; 2011, 4; 96-119
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction of eucalyptus oil as reduction of bacterial growth in drinking water
    Autorzy:
    Dubey, A.K.
    Sahu, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/11148.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    extraction
    eucalyptus oil
    reduction
    bacterial growth
    drinking water
    composition
    essential oil
    growth rate
    microbe
    Opis:
    Drinking water is acting as life line for living thing on the Earth, without that no life. Due to global industrialization availability of pure water is one of the major issues. The effluent are directly or indirectly discharge through the river stream, which affect the ground as well as sea water and climatically cycle water reach to us. In that condition medicine are required for quire purpose. In the world so many plants and herbs are available which are used as antimicrobial and sources of medicines. Today the large number of drugs in use is derived from plants. The important advantages for therapeutic uses of medicinal plants in various ailments are their safety besides being economical, effective and easy availability. In this regard’s herb plant Eucalyptus extracted oil is used as antibacterial agent to treat the drinking water.
    Źródło:
    International Letters of Natural Sciences; 2014, 11, 2
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obstructive sleep apnea risk for driving license applicants in India – A community based study
    Autorzy:
    Dubey, Abhishek
    Bajaj, Darshan K.
    Mishra, Apurva
    Singh, Balendra P.
    Gupta, Vinay
    Kant, Surya
    Dixit, Swati
    Powiązania:
    https://bibliotekanauki.pl/articles/2161795.pdf
    Data publikacji:
    2017-10-18
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    obstructive sleep apnea
    drivers
    sleepiness
    road traffic accidents
    STOP-Bang
    high blood pressure
    Opis:
    Objectives: To determine the risk of obstructive sleep apnea (OSA) for male permanent driving license (DL) applicants of Lucknow, India. Material and Methods: In this cross-sectional community based, study body mass index, waist–hip ratio, blood pressure of each subject were determined as an anthropometric parameter along with the history of habit of smoking, tobacco chewing, alcohol consumption. STOP-Bang (Snoring, Tired or sleepy, Observed apnea, high blood Pressure, Body mass index, Age, Neck, Gender) Questionnaire – a scoring risk assessment tool – was applied for assessment of OSA risk (high OSA risk defined by score ≥ 3) for 542 male DL recipients at 2 Regional Transport Office (RTO) centers in Lucknow, India. The statistical software SPSS 17.0 was applied to the testing. Results: In total 23% (N = 125) of participants were found with the risk of OSA. High blood pressure (≥ 140/90 mm Hg) was found for the maximum number of participants (40.5%) followed by neck circumference > 40 cm (17.1%), age (> 50 years old) (15.3%), snoring (12.3%) and tired/sleepy (10.5%). Mean values of age, anthropometric measurements and blood pressure were observed significantly higher (p < 0.001) for participants with the OSA risk. In this population the risk of OSA risk (STOP-Bang score ≥ 3) was observed for 6.7% of young (< 35 years old), 34% of middle (35–45 years old) and 73% of elder age adults (> 45 years old). Conclusions: In view of findings of this study a high number of male driving license applicants were observed with the risk of OSA. Therefore efforts should be made to develop a national screening guideline/protocol for the OSA risk assessment for driving license applicants in India. This may reduce the possibility of road traffic accidents due to the OSA-associated fatigue and drowsiness behind the wheels. Int J Occup Med Environ Health 2018;31(1):25–36
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 1; 25-36
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    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:
    A communication network routing problem: Modeling and optimization using non-cooperative game theory
    Autorzy:
    Dubey, Sapana P.
    Kedar, Ganesh D.
    Ghate, Suresh H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1838181.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    communication network
    routing problem
    game theory
    focal points
    Nash equilibrium
    Pareto optimal solution
    sieć komunikacyjna
    teoria gier
    punkt ogniskowy
    równowaga Nasha
    Opis:
    We consider a communication network routing problem wherein a number of users need to efficiently transmit their throughput demand in the form of data packets (incurring less cost and less delay) through one or more links. Using the game theoretic perspective, we propose a dynamic model which ensures unhindered transmission of data even in the case where the capacity of the link is exceeded. The model incorporates a mechanism in which users are appropriately punished (with additional cost) when the total data to be transmitted exceeds the capacity of the link. The model has multiple Nash equilibrium points. To arrive at rational strategies, we introduce the concept of focal points and get what is termed focal Nash equilibrium (FNE) points for the model. We further introduce the concept of preferred focal Nash equilibrium (PFNE) points and find their relation with the Pareto optimal solution for the model.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 155-164
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Successful prolonged use of non-invasive ventilation in severe COVID-19 patients: a case series.
    Autorzy:
    Mustahsin, Mohd
    Sharma, Soumya
    Dubey, Madhulika
    Choubey, Sanjay
    Fatima, Jalees
    Singh, Garima
    Powiązania:
    https://bibliotekanauki.pl/articles/1918239.pdf
    Data publikacji:
    2021-12-31
    Wydawca:
    Towarzystwo Pomocy Doraźnej
    Tematy:
    COVID-19 disease
    COVID-19 pandemic
    acute hypoxemic respiratory failure
    non-invasive ventilation
    endotracheal intubation
    coronavirus
    case report
    Opis:
    BACKGROUND: The Coronavirus disease-19 (COVID-19) primarily affects respiratory system leading to acute hypoxemic respiratory failure. Invasive mechanical ventilation has been a gold standard in the respiratory therapy of patients with acute respiratory distress syndrome (ARDS). It requires advanced ventilators, qualified intensivists and trained intensive care unit (ICU) staff to manage, which is not readily available and of which there has been a perpetual shortage during the current pandemic. Non-invasive ventilation (NIV) is one of the bridging non-invasive respiratory supports to avoid invasive intubation intended to improve oxygenation and ventilation in severe COVID-19 patients where conventional oxygen therapy fails. CASE: The authors report a series of four cases where prolonged NIV was used under expert supervision in patients with severe COVID-19 disease. CONCLUSIONS: This case series showed that NIV can be prolonged successfully under supervision in severe COVID-19 patients that can avoid intubation and its complications.
    Źródło:
    Critical Care Innovations; 2021, 4, 4; 34-44
    2545-2533
    Pojawia się w:
    Critical Care Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Usage of deep learning in recent applications
    Autorzy:
    Dubey, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200557.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    conceptual based information retrieval
    ontology
    semantic search
    wyszukiwanie informacji oparte na pojęciach
    ontologia
    wyszukiwanie semantyczne
    Opis:
    Purpose: Deep learning is a predominant branch in machine learning, which is inspired by the operation of the human biological brain in processing information and capturing insights. Machine learning evolved to deep learning, which helps to reduce the involvement of an expert. In machine learning, the performance depends on what the expert extracts manner features, but deep neural networks are self-capable for extracting features. Design/methodology/approach: Deep learning performs well with a large amount of data than traditional machine learning algorithms, and also deep neural networks can give better results with different kinds of unstructured data. Findings: Deep learning is an inevitable approach in real-world applications such as computer vision where information from the visual world is extracted, in the field of natural language processing involving analyzing and understanding human languages in its meaningful way, in the medical area for diagnosing and detection, in the forecasting of weather and other natural processes, in field of cybersecurity to provide a continuous functioning for computer systems and network from attack or harm, in field of navigation and so on. Practical implications: Due to these advantages, deep learning algorithms are applied to a variety of complex tasks. With the help of deep learning, the tasks that had been said as unachievable can be solved. Originality/value: This paper describes the brief study of the real-world application problems domain with deep learning solutions.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 115, 2; 49--57
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of artificial coarseness on the performance of rectangular solar air heater duct: a comparative study
    Autorzy:
    Dubey, Manoj Kumar
    Prakash, Om
    Powiązania:
    https://bibliotekanauki.pl/articles/27312238.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    solar energy
    artificial
    coarseness
    heat transfer coefficient
    thermo-hydraulic performance
    friction factor
    Opis:
    Solar air heater is regarded as the most common and popular solar thermal system and has a wide range of applications, from residential to industrial. Solar air heater is not viable because of the low convective heat transfer coefficient at the absorber plate which contributes to decreasing the thermal efficiency. Artificial coarseness on the plain surface is the most effective method to enhance heat transfer with a moderate rate of friction factor of flowing air in the design of solar air heater duct. The different parameters and different artificial coarseness are responsible to alter the flow structure and heat transfer rate. Over the years different artificial roughness and how its geometry affects the performance of solar air heater have been thoroughly studied. Various investigators report the correlations between heat transfer and friction factors. In the present study, a comparison of several artificial coarseness geometries and methods with a view to enhancing the performance of solar air heater has been made. A brief outline has also been presented for future research.
    Źródło:
    Archives of Thermodynamics; 2023, 44, 3; 325--358
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of Reconfigurable Multiple Shaped Beams of a Concentric Circular Ring Array Antenna Using Evolutionary Algorithms
    Autorzy:
    Dubey, Sanjay Kumar
    Mandal, Debasis
    Powiązania:
    https://bibliotekanauki.pl/articles/2200965.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    cosec2 beam
    differential evolution algorithm (DE)
    firefly algorithm (FA)
    flat top beam
    genetic algorithm (GA)
    multiple shaped beam patterns
    pencil beam
    Opis:
    The approach described in this paper uses evolutionary algorithms to create multiple-beam patterns for a concentric circular ring array (CCRA) of isotropic antennas using a common set of array excitation amplitudes. The flat top, cosec2, and pencil beam patterns are examples of multiple-beam patterns. All of these designs have an upward angle of θ = 0◦. All the patterns are further created in three azimuth planes (φ = 0◦, 5◦, and 10◦). To create the necessary patterns, non-uniform excitations are used in combination with evenly spaced isotropic components. For the flat top and cosecant-squared patterns, the best combination of common components, amplitude and various phases is applied, whereas the pencil beam pattern is produced using the common amplitude only. Differential evolutionary algorithm (DE), genetic algorithm (GA), and firefly algorithm (FA) are used to generate the best 4-bit discrete magnitudes and 5-bit discrete phases. These discrete excitations aid in lowering the feed network design complexity and the dynamic range ratio (DRR). A variety of randomly selected azimuth planes are used to verify the excitations as well. With small modifications in the desired parameters, the patterns are formed using the same excitation. The results proved both the efficacy of the suggested strategy and the dominance of DE over GA as well as FA.
    Źródło:
    Journal of Telecommunications and Information Technology; 2023, 1; 8--17
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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