Organic Farming Technologies and Practices Followed by the Farmers

The study mainly focused on organic farming technologies and practices followed by the farmers for coconut, millets, sugarcane and turmeric. The study was conducted in Coimbatore, Erode and Dharampuri districts of Tamil Nadu. A sample of 100 organic farmers was the respondents for the present study. The data were collected from each respondent through personal interview method with the help of interview schedule. The data were analyzed using percentage analysis. The results revealed that, majority of the respondents followed seed treatment with Azospirillum, beejamrutha and panchakavya, application of jeevamruthum and panchakavya through drip irrigation, application of farm yard manure and insitu ploughing of green manure crops, mulching with crop leaf residues and weeds, spraying of agni astram to repel pests, post harvest technology like oil extraction and jaggary preparation, storage techniques like using neem and pungam leaves. The result of the present study shows that, the farmers have the inclination for adoption of organic production practices. Hence it may be concluded from the study that, there is an imperative need to raise the level of adoption of these organic farming practices in order to reduce the quantum of environmental hazards by inorganic farming

Reasons for Resorting to Organic Farming and Advantages Perceived by the Organic Farmers

The study mainly focused on reasons for resorting to organic farming and advantages and benefits perceived by the organic farmers. The study was conducted in Coimbatore, Erode and Dharampuri districts of Tamil Nadu. A sample of 100 organic farmers were the respondents for the present study. The data were collected from each respondent through personal interview method with the help of interview schedule. The results revealed that, major reasons for resorting to organic farming were premium price ( 75.00%) conservation of environment (72.00%), production of high quality, toxic and pesticide free product (68.00%) and negative experiences face with inorganic farming(50.00%) and perceived benefits of organic farming were increased soil properties(100.00%), reduced cost on external inputs (82.00%), efficient use of local on- farm resources(77.00%) and water holding capacity of soil (75.00%).

Multiple-spin coherence transfer in linear Ising spin chains and beyond: numerically-optimized pulses and experiments

We study multiple-spin coherence transfers in linear Ising spin chains with nearest neighbor couplings. These constitute a model for efficient information transfers in future quantum computing devices and for many multi-dimensional experiments for the assignment of complex spectra in nuclear magnetic resonance spectroscopy. We complement prior analytic techniques for multiple-spin coherence transfers with a systematic numerical study where we obtain strong evidence that a certain analytically-motivated family of restricted controls is sufficient for time-optimality. In the case of a linear three-spin system, additional evidence suggests that prior analytic pulse sequences using this family of restricted controls are time-optimal even for arbitrary local controls. In addition, we compare the pulse sequences for linear Ising spin chains to pulse sequences for more realistic spin systems with additional long-range couplings between non-adjacent spins. We experimentally implement the derived pulse sequences in three and four spin systems and demonstrate that they are applicable in realistic settings under relaxation and experimental imperfections-in particular-by deriving broadband pulse sequences which are robust with respect to frequency offsets.Comment: 11 page

Reasons for Resorting to Organic Farming and Advantages Perceived by the Organic Farmers

The study mainly focused on reasons for resorting to organic farming and advantages and benefits perceived by the organic farmers. The study was conducted in Coimbatore, Erode and Dharampuri districts of Tamil Nadu. A sample of 100 organic farmers were the respondents for the present study. The data were collected from each respondent through personal interview method with the help of interview schedule. The results revealed that, major reasons for resorting to organic farming were premium price ( 75.00%) conservation of environment (72.00%), production of high quality, toxic and pesticide free product (68.00%) and negative experiences face with inorganic farming(50.00%) and perceived benefits of organic farming were increased soil properties(100.00%), reduced cost on external inputs (82.00%), efficient use of local on- farm resources(77.00%) and water holding capacity of soil (75.00%).

A Hybridization of Cuk and Boost Converter Using Single Switch with Higher Voltage Gain Compatibility

In the current era, the desire for high boost DC-to-DC converter development has increased. Notably, there has been voltage gain improvement without adding extra power switches, and a large number of passive components have advanced. Magnetically coupled isolated converters are suggested for the higher voltage gain. These converters use large size inductors, and thus the non-isolated traditional boost, Cuk and Sepic converters are modified to increase their gain by adding an extra switch, inductors and capacitors. These converters increase circuit complexity and become bulky. In this paper, we present a hybrid high voltage gain non-isolated single switch converter for photovoltaic applications. The proposed converter connects the standard conventional Cuk and boost converter in parallel for providing continuous current mode operation with the help of a single power switch, which gives less voltage stress on controlled switch and diodes. The proposed hybrid topology uses a single switch with a lower component-count and provides a higher voltage gain than non-isolated traditional converters. The converter circuit mode of operation, operating performance, mathematical derivations and steady-state exploration and circuit parameters design procedures are deliberated in detail. The proposed hybrid converter circuit components, voltage gain and performance, were compared with other topologies in the literature. The MATLAB/Simulink simulation study and microcontroller-based experimental laboratory prototype of 150 W were implemented. The simulation study and experimentation results were confirmed to be a satisfactory agreement with the theoretical analysis. This topology produced non-inverting output in continuous input current mode using a single switch with high voltage gain (≈5.116 gain) with a maximum efficiency of 92.2% under full load.publishedVersio

Interceptive Correction of Anterior Crossbite Using Short-Span Wire-Fixed Orthodontic Appliance: A Report of Three Cases

Anterior crossbite is relatively a common presentation in the mixed dentition stage. If left untreated, it can lead to a host of problems and may complicate future orthodontic treatment. One of the major difficulties in performing anterior crossbite correction in young children is treatment compliance. In most cases, poor compliance is due to the unacceptability of the removable appliance used. This article describes three cases of successful correction of anterior crossbite of patients in mixed dentition using short-span wire-fixed orthodontic appliances. This sectional appliance provides an alternative method of correcting anterior crossbite of dental origin and offers many advantages compared to the use of removable appliances

Selective colorimetric detection of nanomolar Cr (VI) in aqueous solutions using unmodified silver nanoparticles

In this study we present a colorimetric detection method for Cr (VI) in aqueous solution based on as synthesized silver nanoparticles (Ag NPs) without surface functionalization. The method principle involves reduction of Cr (VI) to Cr (III) by excess reductant present in as synthesized Ag NP dispersion, and subsequent aggregation of Ag NPs by Cr (III) leading to red-shift of the surface plasmon resonance (SPR) peak. The UV-vis absorption spectra. Zeta potentials, dynamic light scattering measurements, and scanning electron microscopy (SEM) confirmed the aggregation of the Ag NPs. Under the optimized conditions, a good linear relationship (correlation coefficient r=0.981) was obtained between the ratio of the absorbance at 550 nm to that at 390 nm (A(550/390)) and the concentration of Cr (VI) over the range of 10(-3)-10(-9) M 50 mg/L to 50 ng/L]. The reported probe has a limit of detection down to 1 nM, which, to the best of our knowledge, is the lowest ever reported for the colorimetric detection of Cr (VI). Furthermore, a remarkable feature of this method is that it involves a simple technique exhibiting high selectivity to Cr (VI) over other tested heavy metal ions. (C) 2012 Elsevier BM. All rights reserved