749 research outputs found

    NMR GHZ

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    We describe the creation of a Greenberger-Horne-Zeilinger (GHZ) state of the form |000>+|111> (three maximally entangled quantum bits) using Nuclear Magnetic Resonance (NMR). We have successfully carried out the experiment using the proton and carbon spins of trichloroethylene, and confirmed the result using state tomography. We have thus extended the space of entangled quantum states explored systematically to three quantum bits, an essential step for quantum computation.Comment: 4 pages in RevTex, 3 figures, the paper is also avalaible at http://qso.lanl.gov/qc

    Stochastic Models on Time to Recruitment in a Two Grade Manpower System using Different Policies of Recruitment

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    In this paper a two grade organization in which depletion of manpower occurs due to its policy decisions is considered. Two mathematical models are constructed employing two different univariate recruitment policies, based on shock model approach. The mean and variance of the time to recruitment are obtained for both the models under different conditions. The analytical results are numerically illustrated and relevant conclusions are presented

    Preparation of Al2O3 - SiC In-Situ Composite Powder Mixtures by Carbothermal Reduction of Kaolinite

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    A1,,O3-SiC,, composite powder mixtures were prepared by carbothermal reduction of kaolinite (A],03.2SiO,.2H,O) in argon atmosphere at constant gas pressure of 0.15 MPa. The reactions were carried out with different mole ratios of silica (in the precursor) and carbon (4.5-9.0), with two types of carbon i.e.carbon black (300m2/g)and activated charcoal (1000m2/g) and at different temperatures in the temperature range of 1550-17000C with one hour of soaking to find the progress of the reaction in all the cases. It was observed that the reactions were complete at 17000C. The reactions were carried out with higher soaking time to optimise the process. It was noted that mullite forms as the intermediate phase at lower temperatures which converts progressively later to a mixture of A1,O, and SiC,, composite product at higher temperatures

    A PILOT STUDY ON THE EFFICACY OF SIDDHA MEDICINE SEENTHIL SARKARAI IN THE MANAGEMENT OF MOOTHIRAKIRICHARAM (URINARY TRACT INFECTION)

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    Objective: The present pilot study was designed to evaluate the efficacy of Seenthil sarkarai, a Classical Siddha medicine in Moothirakiricharam (Urinary Tract Infection) patients.Method: This study was approved by IEC and registered in Clinical Trial Registry of India and was conducted at the National Institute of Siddha, Tambaram, Chennai, India. The investigator recruited 20 patients of both male and female with an inclusion and exclusion criteria. All the patients were treated with Seenthil Sarkarai at the dose level of 2 grams two times a day with warm water for 21 days. Dietary regimen was advised for the patients. Study outcome was studied with negative Urine culture and also based on the improvement in the reduction of Burning micturition, Frequency of micturition, Dysuria with fever, Foul smelling urine.Results: The symptoms such as burning micturition, persistent urge to urinate, foul smelling urine, and presence of bacteriuria reduced markedly within 21 days of duration. Out of 20 patients, 12 patients were completely relieved from the compliance of UTI with negative Urine culture. The symptoms of UTI were markedly reduced in remaining 8 patients. There were no adverse effect reported during the study and no recurrence of UTI was noticed in 12 patients who were completely cured.Conclusion: Results suggest that the trial drug Seenthil Sarkarai is effective and safe for the management of Moothirakiricharam (UTI) and in alleviating recurrences

    Comparison of methods for evaluating the suitability of Vertisols for Gossypium hirsutum (Bt cotton) in two contrasting agro-ecological regions

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    This is the author accepted manuscript. The final version is available from Taylor and Francis (Routledge) via the DOI in this record.Cotton (Gossypium sp.) is a major crop grown under rainfed conditions in Vertisols and associated soils in semi-arid tropical (SAT) regions of Peninsular India. In recent years, cotton productivity has declined due to various biophysical factors including pest and diseases, seasonal water stress soil degradation and poor crop management practices. In this study, we compare two methods for evaluating the suitability of Vertisols for cotton in contrasting two agro-ecological regions viz., sub-humid moist (SHM) region and semi-arid dry(SAD) were characterized. Twelve cotton growing Vertisols (seven from SHM and five from SAD) were evaluated for their suitability for cotton cultivation using soil quality index (SQI) and modified Sys-FAO method. SQIs were calculated using the weighted additive index from transformed scores of selected indicators by principal component analysis. For Sys-FAO method both biophysical and soil characteristics were considered for suitability evaluation. We found that the soils of SHM region were moderately suitable for cotton cultivation with soil moisture as the major limiting factor, whereas the soils of SAD region are marginally suitable due to high exchangeable sodium percentage and poor hydraulic conductivity. From this, it may be concluded that the weighted SQI has better agreement with the cotton yield

    Comparative catching efficiency of traditional prawn fishing gears in Pulicat lake of Tamil Nadu, India

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    303-310Prawn fishery in Pulicat Lake has a significant role in livelihood of the fishers, which is being harvested through different fishing gears. Here, we investigated the prawn-fishing gear and their catch composition. The information on various aspect about the gears was collected from the 48 respondents each month through pre-designed interview schedule by adopting random sampling. Results revealed that the quantity of prawn were higher in stake net (209.83 kg), followed by barriers (118.58 kg), drive-in-net (55.58 kg) tangle net (18.25 kg) and was statically significant at 5 %. It was estimated that more than half (52.16 %) of the total prawn catch in Pulicat Lake was obtained through stake net than the barriers (29.48 %), drive-in-net (13.82 %) and tangle net (4.54 %). The maximum quantity of prawn was obtained during the November and December in all the prawn-fishing gear (p < 0.05). This study concludes that non-selective fishing gears resulted in the abundant catch of juvenile fishes and crabs, need to be regulated mesh size, to support the conservation and sustainable harvest of the fishery resources in Pulicat Lake

    Flood susceptibility analysis (FSAn) using multi-criteria evaluation (MCE) technique for landuse planning: A case from Penampang, Sabah, Malaysia

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    Flooding is one of the main natural disasters in Sabah, Malaysia. Several current cases of disastrous flooding were recorded particularly in Penampang area, Sabah (e.g. July 1999; October 2010; April 2013; October & December 2014). Substantial downpour has triggered floods and caused extreme loss in Penampang area. The 2014 floods have affected 40,000 people from 70 villages. The objectives of this research are (i) To determine the factors contributing to the flood occurrences; (ii) To analyst the Flood Susceptibility Level (FSL); and (iii) and to produce the flood hazard map for the study area. In this study, eight (8) parameters were considered in relation to the causative factors to flooding, which are: rainfall, slope gradient, elevation, drainage density, land use, soil textures, slope curvatures and flow accumulation. Flood Susceptibility Analysis (FSAn) map was produced based on the data collected from the field survey, laboratory analysis, high resolution digital radar images (IFSAR) acquisition, and secondary data in year 2014. FSL was defined using Multi Criteria Evaluation (MCE) technique integrated with GIS software. Based on the FSAn, approximately 3.17% of total study area classified as Very High Hazard (VHH), 4.55% as High Hazard (HH), 15.52% as Moderate Hazard (MH), 15.72% as Low Hazard (LH) dan 61.04% as Very Low Hazard (VLH) respectively. Based on the risk rate, requirements for the development procedure has been recommended in this paper. The map produced will be a very useful source for consulting, planning agencies and local governments in managing risk, land-use zoning and redressal efforts to mitigate risks. Besides, the method used in this study can easily be applied to other areas, where other factors may be considered, depending on the convenience of data

    Development of self-repair nano-rod scaffold materials for implantation of osteosarcoma affected bone tissue

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    Osteosarcoma is the most widely recognized fatal bone disease in children and young adults. The osteosarcoma affected places of bone implant materials lose their activity after a period of time due to the possibility of regenerating sarcoma cells. Hence, the complete recovery of this disease is very challenging. Subsequently, new helpful methodologies, including natural antioxidant loaded bone implant materials, are effectively used to treat osteosarcoma cells. In this regard, nano-hydroxyapatite reinforced with a xylitol based poly(xylitol sebacate) PXS co-polymer together with a capsaicin loaded scaffold was investigated on osteosarcoma cells. The physicochemical properties of the scaffold were evaluated by FT-IR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy), TEM (transmission electron microscopy), and XRD (X-ray diffraction). The in vitro release and antioxidant activity of the capsaicin loaded nHAP/PXS/CAP scaffold were evaluated by UV-Visible spectroscopy. Cytotoxicity against the Saos-2 cancer line and cell viability in the osteoblast cell MG63 are reported. Eventually, the composite enlarges the creation of reactive oxygen species (ROS) in Saos-2 cells
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