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Now showing items 65 - 80 of 766

  • Farmer Participatory Crop Improvement. II. Participatory Varietal Selection, a Case Study in India

    Joshi, A.   Witcombe, J. R.  

    Farmer participatory varietal selection (PVS) was used to identify farmer-acceptable cultivars of rice and chickpea. Farmers' requirements in new crop cultivars (varieties) were determined, a search was carried out for released and non-released cultivars that matched these needs, and they were tested in farmer-managed, participatory trials. Farmer-acceptable cultivars were found amongst released material, but not among the recommended material for the area. Lack of adoption is, therefore, because resource-poor farmers have not been recommended or exposed to the most appropriate cultivars under the existing system of varietal identification and popularization. Adoption rates of cultivars would be improved by increased farmer participation, the systematic testing in zonal trials of locally popular cultivars to define their domains property, a more liberal release system, and a more open system of providing seeds of new cultivars to farmers.
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  • On neurobiological, neuro-fuzzy, machine learning, and statistical pattern recognition techniques

    Joshi, A.   Ramakrishman, N.   Houstis, E.N.   Rice, J.R.  

    In this paper, we propose two new neuro-fuzzy schemes, one for classification and one for clustering problems. The classification scheme is based on Simpson's fuzzy min-max method and relaxes some assumptions he makes. This enables our scheme to handle mutually nonexclusive classes. The neuro-fuzzy clustering scheme is a multiresolution algorithm that is modeled after the mechanics of human pattern recognition. We also present data from an exhaustive comparison of these techniques with neural, statistical, machine learning, and other traditional approaches to pattern recognition applications. The data sets used for comparisons include those from the machine learning repository at the University of California, Irvine. We find that our proposed schemes compare quite well with the existing techniques, and in addition offer the advantages of one-pass learning and on-line adaptation.
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  • Direct access day case oral surgery

    Joshi, A.   Doyle, L.   Worthington, H.   Joshi, A.  

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  • Donor Derived Cell Free DNA is Elevated With Pathogens That are Risk Factors For Chronic Lung Allograft Dysfunction

    Shah, P.   Rohly, M.   Brown, A.   Timofte, I.   Nayyar, M.   Gandhi, A.   Kim, N.   Joshi, A.   Iacono, A.   Nathan, S.   Avery, R.   Orens, J.   Agbor-Enoh, S.   Valantine, H.  

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  • Blood Transfusion Effect on the Respiratory Pattern of Preterm Infants

    JOSHI, A.   GERHARDT, T.   SHANDLOFF, P.   BANCALARI, E.  

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  • SQUEEZING AND SOME OTHER CHARACTERISTICS OF TIME-DEPENDENT HARMONIC OSCILLATOR WITH VARIABLE MASS

    JOSHI, A.   LAWANDE, S. V.  

    In this paper we investigate the time evolution of a general time-dependent harmonic oscillator (TDHO) with variable mass using Feynman path integral approach. We explicitly evaluate the squeezing in the quadrature components of a general quantum TDHO with variable mass. This calculation is further elaborated for three particular cases of variable mass whose propagator can be written in a closed form. We also obtain an exact form of the time-evolution operator, the wave function, and the time-dependent coherent state for the TDHO. Our results clearly indicate that the time-dependent coherent state is equivalent to the squeezed coherent state
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  • Who Defers to Whom and Why? Dual Pathways Linking Demographic Differences and Dyadic Deference to Team Effectiveness

    Joshi, A.   Knight, A. P.  

    We develop and test predictions about how demographic differences influence dyadic deference in multidisciplinary research teams, and how differential patterns of dyadic deference emerge to shape team-level effectiveness. We present a dual pathway model that recognizes that two distinct mechanisms task contributions and social affinity-account for how team members' demographic attributes contribute to deference. Furthermore, we propose that the extent to which these different mechanisms are prevalent in a team has implications for the team's research productivity, with deference based on social affinity detracting from it and deference based on task contributions enhancing it. Using longitudinal data from a sample of 55 multidisciplinary research teams comprising 619 scientists, we found general support for our conceptual model. Our findings underscore the importance of accounting for multiple interpersonal mechanisms to understand the complex, multilevel nature of deference in teams.
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  • A Simple Test to Monitor Aromatic Amine Clearance in Occupational Workers

    Joshi, A.   Tewari, P.   Khanna, S. K.   Singh, G. B.  

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  • From ceiling fans to A/C and juice: Javed Akhtar in conversation with Priya Joshi

    Joshi   Priya  

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  • Effects of Atomic Coherence on Collapses and Revivals in the Binomial State of the Field

    Joshi, A.   Puri, R.R.  

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  • Study of the growth temperature dependence of performance and reliability of thin MOS gate oxides

    Joshi, A.   Kwong, D.-L.  

    An in-depth and systematic investigation is carried out to find the role of oxide growth temperature in determining the quality of the resulting gate oxide in MOS devices. Performance of fresh devices as well as degradation under hot-carrier stress and radiation exposure are studied using MOS capacitors and MOSFETs. Experimental results indicated that better charge trapping properties and interface endurance to both hot carrier-stress and ionizing radiation can be realized by elevating the gate oxidation temperature. Substantial experimental evidence is provided to establish that interface state generation during stress is mainly responsible for the degradation of various MOSFET parameters. These findings point out that rapid thermal processing may be the technique for the growth of ultrathin gate oxides for deep-submicrometer MOS technology, at least from the quality and reliability point of view
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  • DYNAMICAL STARK EFFECT IN AN AMPLITUDE MODULATED FIELD

    JOSHI, A.   PURI, R.R.   LAWANDE, S.V.  

    The analytic solution of the Bloch equations in the secular approximation for a two level atom driven off-resonance by an intense amplitude modulated field is presented. The dependence of the atomic population inversion on the longitudinal and transverse lifetimes is investigated
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  • Hippocampal and Mesial Temporal Sclerosis in Early-Onset Frontotemporal Lobar Degeneration Versus Alzheimer\"s Disease

    Joshi, A.   Teng, E.   Tassniyom, K.   Mendez, M. F.  

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  • Tribal Health and Medicinesby A. K. Kalla; P. C. Joshi

    Review by: Satish Kedia and Sunil Khanna  

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  • Coatings with particulate dispersions for high temperature oxidation protection of carbon and C/C composites

    Joshi, A.   Lee, J. S.  

    Two common failure modes of protective coatings on carbon/carbon composites and graphite include poor adhesion and cracking at elevated temperatures or during cool-down to low temperatures. These problems are addressed using the fused slurry approach and highly oxidation resistant coatings are produced. High adherence of the coatings is achieved by forming the layered structures during reaction with the substrate. A novel approach of avoiding through-coating cracks in the coating structure is utilized to substantially enhance the oxidation resistance of the coating. In this approach cracks are confined within the phases, often involving refractory metal carbides, silicon and silicides, of the coating microstructure and through-coating cracks are completely eliminated. Coating systems involving Si-Hf-Cr, Si-Zr-Cr and Si-Ti have been synthesized that can withstand elevated temperature excursions in oxidizing environments. Process parameters such as slurry fusion temperature and time, and slurry composition are optimized to achieve desired coating microstructure and layering with minimal through-coating cracks. Further enhancements to avoiding through-coating cracks are made by employing particulate dispersions within the coating microstructure. The hard particles serve to arrest the growing cracks as well as to aid in refining the grain size of phases within the coating. Both factors contribute to eliminating through-coating cracks, which was essential in producing coatings that are oxidation resistant to 1600°C.
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  • Fractured Modernity: Making of a Middle Class in Colonial North Indiaby Sanjay Joshi

    Review by: Rochona Majumdar  

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