Design of an Intelligent Power Supply System

We aim to create a constant DC output source from a variable input AC source wherein the perturbations on the output side due to addition of load on the system does create an impact on the output profile of the system. Through the use of PID controllers and Fuzzy Controllers, we seek to lock the output at a desired value. The results from the usage of both the controllers are checked and compared and the best design is then tested with various output configurations and for stabillity in varying loading condition

An Innovative Approach to Achieve Compositionality Efficiently using Multi-Version Object Based Transactional Systems

In the modern era of multicore processors, utilizing cores is a tedious job. Synchronization and communication among processors involve high cost. Software transaction memory systems (STMs) addresses this issues and provide better concurrency in which programmer need not have to worry about consistency issues. Another advantage of STMs is that they facilitate compositionality of concurrent programs with great ease. Different concurrent operations that need to be composed to form a single atomic unit is achieved by encapsulating them in a single transaction. In this paper, we introduce a new STM system as multi-version object based STM (MVOSTM) which is the combination of both of these ideas for harnessing greater concurrency in STMs. As the name suggests MVOSTM, works on a higher level and maintains multiple versions corresponding to each key. We have developed MVOSTM with the unlimited number of versions corresponding to each key. In addition to that, we have developed garbage collection for MVOSTM (MVOSTM-GC) to delete unwanted versions corresponding to the keys to reduce traversal overhead. MVOSTM provides greater concurrency while reducing the number of aborts and it ensures compositionality by making the transactions atomic. Here, we have used MVOSTM for the list and hash-table data structure as list-MVOSTM and HT- MVOSTM. Experimental results of list-MVOSTM outperform almost two to twenty fold speedup than existing state-of-the-art list based STMs (Trans-list, Boosting-list, NOrec-list, list-MVTO, and list-OSTM). HT-MVOSTM shows a significant performance gain of almost two to nineteen times better than existing state-of-the-art hash-table based STMs (ESTM, RWSTMs, HT-MVTO, and HT-OSTM). MVOSTM with list and hash-table shows the least number of aborts among all the existing STM algorithms. MVOSTM satisfies correctness-criteria as opacity.Comment: 35 pages, 23 figure

A Study on Awareness Levels and Adaptation Strategies for Climate Variability among Farmers

Climate change has become a severe threat to the development and communities around the globe are already experiencing the sudden impacts. It is also being assumed that climate change will have significant negative impacts on agricultural productivity .In this respect 120 farmers were interviewed as respondents to explore the climate variability/change awareness and farmers mitigation strategies. This study was conducted in Rangareddy district of Telangana .Three mandals were selected randomly .From each mandal two villages and from each village 20 farmers were selected randomly .Total number of respondents are 120 Findings of the study indicated that farmers\u27 awareness regarding climate variability was very poor they were just having knowledge on behalf of their farming experience. Varied response was seen regarding causes of climate change. In addition, adaptations of mitigation strategies such as natural resource management, water harvesting, crop diversification migration to less weather prone area and USAge of weather resistant varieties were almost negligible. Results showed that out of 15 adaptation strategies, micro irrigation ranked first among farm adaptive measures, while crop insurance has ranked as least utilized. Conservation agriculture could be the most viable strategy. Farmers have to utilize their existing resources in judicious ways. It is suggested on the basis of findings that role of extension field staff should be diversified. Farmers need capacity building regarding conservation agriculture. Moreover, it is dire need to popularize climate change and its adaptation through effective media campaign

Thermally induced subgap features in the cotunneling spectroscopy of a carbon nanotube

We report on nonlinear cotunneling spectroscopy of a carbon nanotube quantum dot coupled to Nb superconducting contacts. Our measurements show rich subgap features in the stability diagram which become more pronounced as the temperature is increased. Applying a transport theory based on the Liouville-von Neumann equation for the density matrix, we show that the transport properties can be attributed to processes involving sequential as well as elastic and inelastic cotunneling of quasiparticles thermally excited across the gap. In particular, we predict thermal replicas of the elastic and inelastic cotunneling peaks, in agreement with our experimental results.Comment: 21 pages, 9 figures, submitted to New Journal of Physic

Character association and path coefficient analysis for grain yield of parents and hybrids in rice (Oryza sativa L.)

An experiment was conducted to study the inter-relationships, direct and indirect effects of various yield attributing characters towards grain yield per plant, at Rice Research Centre, Rajendranagar. Grain yield per plant had significant positive correlation with productivity per day (0.97), panicle weight (0.71), number of filled grains per panicle (0.57), panicle length (0.46), number of productive tillers per plant (0.34), days to 50 per cent flowering (0.23) and plant height (0.16).Path analysis revealed that productivity/ day (0.91) was the major contributor for grain yield followed by, days to 50 per cent flowering (0.19), grain length (0.05), number of productive tillers per plant (0.04), panicle weight (0.04) and number of filled grains per panicle (0.04). It can be concluded from the study that, the above characters can be used as the selection criteria in any rice yield improvement breeding programmes

Grid Connected Distributed Generation System with High Voltage Gain Cascaded DC-DC Converter Fed Asymmetric Multilevel Inverter Topology

The paper presents distributed generation (DG) system in grid connected mode of operation with asymmetric multi-level inverter (AMLI) topology. Cascaded type DC-DC converter is employed to feed proposed AMLI topology. The DG output voltage (generally low voltage) is stepped up to the required level of voltage using high-gain DC-DC converter. Proposed AMLI topology consists of capacitors at the primary side. The output of high-gain DC-DC converter is fed to split voltage balance single-input multi-output (SIMO) circuit to maintain voltage balance across capacitors of AMLI topology. Cascaded DC-DC converters (both high-gain converter and SIMO circuit) are operated in closed-loop mode. The proposed AMLI feeds active power to grid converting DC type of power generated from DG to AC type to feed the grid. PWM pattern to trigger power switches of AMLI is also presented. The inverting circuit of MLI topology is controlled using simplified Id-Iq control strategy in this paper. With the proposed control theory, the active power fed to grid from DG is controlled and power factor is maintained at unity. The proposed system of DG integration to grid through cascaded DC-DC converters and AMLI structure is validated from fixed active power to grid from DG condition. The proposed system is developed and results are obtained using MATLAB/SIMULINK software

Heterosis studies in rice for the identification of better hybrids for Telangana, India

In the present study, 23 elite rice genotypes were test crossed with IR 58025A and based on which, 12 restorer lines viz., Rajendra, MTU 1010, IR 64, KNM 118, NLR 33358, Satya, Varalu, RNR 15048, RNR 15038, Tel- lahamsa, RNR(RK) 28 and RNR(RK) 53 were identified during Kharif- Rabi 2013-14. Then, three CMS lines viz., IR 58025A, IR 68902A and IR 72081A were crossed with these identified 12 restorer lines to produce 36 hybrids in line × tester mating design and were evaluated along with standard hybrid check, PA 6129 at Rice Research Centre, Rajendranagar, during Kharif 2014 to find out the best heterotic combinations in terms of grain yield and yield component characters. The degree of heterosis varied from trait to trait. Out of 36 hybrids studied, the significant standard heterosis for grain yield is observed in 3 hybrids, over best check PA 6129, viz., IR 58025A × MTU 1010 (18.25), IR 68902A × RNR 15038 (14.59) and IR 72081A × RNR 15038 (9.57). The best experimental hybrid IR58025A × MTU 1010 recorded average heterosis (78.26) and heterobeltiosis (64.37). These three experimental hybrids can be further evaluated over locations for large scale commercialization in Telangana

Clinical profile of dengue fever with severe thrombocytopenia and its complications: a retrospective study at a tertiary care hospital in South India

Background: Dengue haemorrhagic fever is a potentially lethal illness that is universally prevalent in the tropics and has become a major health concern globally in recent decades. The clinical manifestation of dengue infection varies from asymptomatic to severe life threatening illness in the form of DHF/DSS. Dengue haemorrhagic fever or DSS may be fatal in 40% to 50% of untreated patients. A hallmark of dengue infection is severe thrombocytopenia which causes concern for the patients and treating doctors. The objective of this study was to correlate clinical profile during the evolution of dengue fever with severe thrombocytopenia (platelets <10,000/mm3), and comparing frequencies between the different clinical forms in order to predict the severity of the disease.  The present study includes 40 individuals who were found to be seropositive with the detection of NS1Ag, IgM and IgG antibodies for dengue infection with severe thrombocytopenia. Early diagnosis and monitoring is largely dependent on haematological parameters. As no specific antiviral therapy is available, supportive therapy is of utmost importance.Methods: This is an observational, descriptive and retrospective study of 40 patients with clinical and serological diagnosis of dengue fever with severe thrombocytopenia (platelets<10,000/mm3), in the period from August 2015 to September 2016, who were admitted in a tertiary care hospital in South India. ELISA was performed for the detection of dengue NS1, Ig M and Ig G, haematological parameters by automated analyzer and peripheral smear, coagulation profile analysis were done.Results: Out of 40 cases with severe thrombocytopenia, 50% of the patients had classical dengue fever, 30% cases had DHF with bleeding manifests and 20% cases with DHF plasma leakage signs and 5% lead to DSS. There was lack of association studied between severe thrombocytopenia and bleeding manifestations as p value<0.065 was insignificant. However, the risk of complications increased with decreasing platelet counts in the present study.Conclusions: Thrombocytopenia was most predominant haematological discrepancy. There was no predilection for any age group or gender for thrombocytopenia or bleeding among the dengue patients. The results were relevant in assessing the severity of infection and can help by enabling the adaptation of the therapeutic conduct to the needs of individual patients