1,081 research outputs found
Issues and Preferences of Horticulture Farmers
A National Farmers Meet (NFM) was organized by Indian Council of Agricultural Research (ICAR) and Tamil Nadu Agricultural University (TNAU) at Regional Research Station (RRS), Paiyur, Tamil Nadu on 14.3.2015. The purpose was to sensitize the farmers about improved horticultural production technologies and obtain first-hand information about issues of horticulture farmers of Karnataka, Tamil Nadu, Andhra Pradesh and Kerala. A brief survey was conducted at NFM with horticulture farmers as respondents (60) through a structured questionnaire. Analysis of the survey data indicated that Mango, Tomato and Marigold are the major fruit, vegetable and ornamental crops cultivated respectively. Non-availability of critical inputs such as fertilizers, seeds/ planting material and lack of remunerative market price are the major issues in contemporary horticulture, apart from unawareness towards improved horticulture production technologies. Field demonstrations and offcampus training programmes are the two major extension interventions preferred by the horticulture farmers; whereas mass media channels are preferred as information sources apart from institutional sources such as development departments and research institutes. Appropriate extension strategies are suggested based on the findings of the survey
Proximity Effects in Radiative Transfer
Though the dependence of near-field radiative transfer on the gap between two
planar objects is well understood, that between curved objects is still
unclear. We show, based on the analysis of the surface polariton mediated
radiative transfer between two spheres of equal radii and minimum gap ,
that the near--field radiative transfer scales as as
and as for larger values of up to the far--field limit. We
propose a modified form of the proximity approximation to predict near--field
radiative transfer between curved objects from simulations of radiative
transfer between planar surfaces.Comment: 5 journal pages, 4 figure
Assessment of growth and yield parameters in Arecanut (Areca catechu L.) through correlation and path analysis under hilly zone of Karnataka
Arecanut (Areca catechu L.) commonly called as betel nut is a high value commercial cropof coastal and Malnad region of Kerala and Karnataka. The present study was carried outat Agricultural and Horticultural research station Sringeri, UAHS Shivamogga in 2018. Thestudy attempts the correlation studies in the germplasm will help to understand the mutualrelationship among various traits and thereby assist in selecting the character contributingto the yield. In addition to this the selection for yield directly is ineffective as yield is affected by many other traits. The highest positive significant for the association of fruit yield per palm was with the fresh kernel weight per palm (0.96g) followed by dry weight of husk per palm (0.89g) and fresh weight of husk per palm (0.89g). Path analysis revealed that nineteen out of thirty-four characters recorded that fruit volume (2.40cc) had highest positive direct effect on fruit yield per palm followed by fresh fruit weight (2.17g) and breadth of leaf sheath (2.11m). It can be concluded that growth and yield characters may be considered in selection criteria for the improvement of yield in arecanut
Convective heat transfer in airflow through a duct with wall thermal radiation
This paper presents a numerical investigation on airflow through a heated horizontal rectangular duct wherein the model considers the combined modes of natural and forced convection heat transfer and the thermal radiation from duct walls. The duct periphery is differentially heated with known temperature profiles imposed on the two opposite vertical sidewalls while the other two walls are treated as adiabatic. The air enters into the duct hydrodynamically fully developed and flows steadily under laminar conditions undergoing thermal development within the duct. Considering several temperature profiles on the two vertical sidewalls, the numerical simulation generates the heat transfer rates and associated fluid flow patterns in the duct for a range of airflow rates, duct aspect ratios and surface emissivity. The variation of local Nusselt number at duct walls and the fluid flow patterns are critically examined to identify thermal instabilities and the significance of wall thermal radiation effects on the overall heat transfer rates
A spectroscopic cell for fast pressure jumps across the glass transition line
We present a new experimental protocol for the spectroscopic study of the
dynamics of glasses in the aging regime induced by sudden pressure jumps
(crunches) across the glass transition line. The sample, initially in the
liquid state, is suddenly brought in the glassy state, and therefore out of
equilibrium, in a four-window optical crunch cell which is able to perform
pressure jumps of 3 kbar in a time interval of ~10 ms. The main advantages of
this setup with respect to previous pressure-jump systems is that the pressure
jump is induced through a pressure transmitting fluid mechanically coupled to
the sample stage through a deformable membrane, thus avoiding any flow of the
sample itself in the pressure network and allowing to deal with highly viscous
materials. The dynamics of the sample during the aging regime is investigated
by Brillouin Light Scattering (BLS). For this purpose the crunch cell is used
in conjunction with a high resolution double monochromator equipped with a CCD
detector. This system is able to record a full spectrum of a typical glass
forming material in a single 1 s shot. As an example we present the study of
the evolution toward equilibrium of the infinite frequency longitudinal elastic
modulus (M_infinity) of a low molecular weight polymer (Poly(bisphenol
A-co-epichlorohydrin), glycidyl end capped). The observed time evolution of
M_infinity, well represented by a single stretched exponential, is interpreted
within the framework of the Tool-Narayanaswamy theory.Comment: 9 pages, 11 figure
A Dirac-type Characterization of k-chordal Graphs
Characterization of k-chordal graphs based on the existence of a "simplicial
path" was shown in [Chv{\'a}tal et al. Note: Dirac-type characterizations of
graphs without long chordless cycles. Discrete Mathematics, 256, 445-448,
2002]. We give a characterization of k-chordal graphs which is a generalization
of the known characterization of chordal graphs due to [G. A. Dirac. On rigid
circuit graphs. Abh. Math. Sem. Univ. Hamburg, 25, 71-76, 1961] that use
notions of a "simplicial vertex" and a "simplicial ordering".Comment: 3 page
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