Analysis of uninterruptable power supply critical‑to‑quality factors

Pavan Mohan Neelamraju,Siva Yellampalli 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.12

The demand for a reliable power supply and electricity continues to increase, which has led to an increase in the production capacities of power generation units and regular utilization of the power transmission infrastructure. This in turn has resulted in significant stress on the system, which can cause issues such as sudden outages. To eliminate these problems, it is important to accurately evaluate the performance of electrical appliances. With this in mind, this paper investigates the power, runtime, and related quantities of Uninterruptible Power Supply (UPS) systems. This information can be used to understand the lifespan, safety, and efficiency of these systems. This study examines how various circuit parameters impact the runtime of a UPS system and analyzes the chronological variations of UPS system runtime using collected parametric data. It also maps the relationship between parameters, such as the temperature at the battery positive terminal, supply voltage, supply current, average power, and total energy stored in the battery with respect to the runtime of the system. Additionally, the future trends of system runtime are inferred using the stated parameters. This study also proposes new methods for assessing the effectiveness of power use and developing forecasting models with relatively small data sets. Overall, the current work offers new insights into UPS system performance and the factors contributing to chronological variations in runtime.

Quantitative Trait Loci and Candidate Genes forYield and Related Traits in Madhukar x Swarna RIL Population of Rice

Anuradha Kotla,Sarla Neelamraju,Surekha Agarwal,Venkateswara Rao Yadavalli,Vishnu Prasanth Vinukonda,VN Chakravarthi Dhavala 한국작물학회 2013 Journal of crop science and biotechnology Vol.16 No.1

Yield of popular rice varieties such as Swarna grown in rainfed lowlands and Madhukar grown in flood prone areas needs to be continuously improved. Recombinant inbred lines (RILs) were developed from the cross between two indica cultivars Madhukar and Swarna. QTLs were mapped using 110 markers in 168 RILs. In all, 26 QTLs were mapped for yield and five related traits on chromosomes 1, 2, 3, 6, 7, 8, 10, 11, and 12. QTL for plant height and days to flowering were co-located between RM23147 - RM337 on chromosome 8. RM251, RM314, and RM1135 were significantly associated with plant height and OsYSL17 was significantly linked with grain yield. Epistatic interaction was detected for plant height and number of tillers. Several candidate genes reported for yield and related traits underlie the QTL regions.

Genotype by Environment (G×E) Interaction Study on Yield Traits in Different Maturity Groups of Rice

Swapna Jadhav,Divya Balakrishnan,Gouri Shankar V,Kavitha Beerelli,Gowthami Chandu,Sarla Neelamraju 한국작물학회 2019 Journal of crop science and biotechnology Vol.22 No.5

Rice production is affected by emerging problems of climate change and over-utilization of resources. To obtain consistent yield across diverse environments, a variety should have adaptability and stability to fit into various growing conditions. G×E interaction and stability performance of 59 rice lines of different maturity durations were investigated for grain yield-related traits in three environments. This study was carried out to identify stable lines for varietal development as well as to identify parental lines with stable contributing traits for further breeding programs. AMMI and GGE analysis showed significant genotype, environment, and G×E interaction indicating the presence of variability among the genotypes and environments. The G×E interaction effect showed that the genotypes responded differently to the variation in environmental conditions or seasonal fluctuations and explained that most of the traits were contributed mainly by genotype, followed by environment and their interaction. As per AMMI biplot analysis, environment1 was identified as the best suited for potential expression of grain yield and related traits. Results of stability analysis revealed that early and mid-early genotypes NH776, NH4371, 27K, NH686, 258S, NH219, and Tellahamsa were identified as the best stable genotypes across all the three seasons for single plant grain yield and hence suitable for wider environments. These selected genotypes can be suggested for hybridization in further breeding programs to develop early genotypes with high yield. The stable early and mid-early lines with high yield potential will be tested in multi-location trials for commercial cultivation.

Transgressive Segregation for Yield Traits in Oryza sativa IR58025B ${\times}$ Oryza meridionalis Ng. $Bc_2F_3$ Population under Irrigated and Aerobic Conditions

Varma, Chejerla Mohan Kumar,Gouda, Patil Kalmeshwer,Saikumar, Surapaneni,Shenoy, Vinay,Shashidhar, Halagappa Eshwarappa,Neelamraju, Sarla 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3

Wild species of the genus Oryza are a good source of beneficial alleles for enhancing rice yield under normal and adverse conditions. $Bc_2F_3$ population was derived from a cross between Oryza sativa IR58025B and Oryza meridionalis Ng. (2n = 24, AA) a heat tolerant wild species to evaluate 12 yield traits under irrigated and aerobic conditions. Analysis of variance and genetic estimates indicated there is substantial genetic variation among progenies under both conditions. Grain yield had high heritability (61.9%) and genetic advance (36.4%) under irrigated conditions but moderate heritability (49.6%) and genetic advance (13.3%) under aerobic conditions indicating that selection for yield will be effective under both conditions. Panicle number, grain number, spikelet fertility, and test weight showed significant positive correlation with grain yield under both conditions. Families out-performing IR58025B for yield under both conditions were obtained providing evidence that phenotypically inferior O. meridionalis contributed to yield increase. This species can be a novel source of natural genetic variation for the improvement of rice under irrigated as well as under aerobic condition.

Transgressive Segregation forYield Traits in Oryza sativa IR58025B X Oryza meridionalis Ng. Bc2F3Population under Irrigated and Aerobic Conditions

Chejerla Mohan Kumar Varma,Patil Kalmeshwer Gouda,Surapaneni Saikumar,Vinay Shenoy,Halagappa Eshwarappa,Sarla Neelamraju 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3

Wild species of the genus Oryza are a good source of beneficial alleles for enhancing rice yield under normal and adverse conditions. BC2F3 population was derived from a cross between Oryza sativa IR58025B and Oryza meridionalis Ng. (2n = 24, AA) a heat tolerant wild species to evaluate 12 yield traits under irrigated and aerobic conditions. Analysis of variance and genetic estimates indicated there is substantial genetic variation among progenies under both conditions. Grain yield had high heritability (61.9%) and genetic advance (36.4%) under irrigated conditions but moderate heritability (49.6%) and genetic advance (13.3%) under aerobic conditions indicating that selection for yield will be effective under both conditions. Panicle number, grain number, spikelet fertility,and test weight showed significant positive correlation with grain yield under both conditions. Families out-performing IR58025B for yield under both conditions were obtained providing evidence that phenotypically inferior O. meridionalis contributed to yield increase. This species can be a novel source of natural genetic variation for the improvement of rice under irrigated as well as under aerobic condition

Quantitative Trait Loci and Candidate Genes forYield and Related Traits in Madhukar ${\times}$ Swarna RIL Population of Rice

Kotla, Anuradha,Agarwa, Surekha,Yadavalli, Venkateswara Rao,Vinukonda, Vishnu Prasanth,Dhavala, V.N. Chakravarthi,Neelamraju, Sarla 한국작물학회 2013 Journal of crop science and biotechnology Vol.16 No.1

Yield of popular rice varieties such as Swarna grown in rainfed lowlands and Madhukar grown in flood prone areas needs to be continuously improved. Recombinant inbred lines (RILs) were developed from the cross between two indica cultivars Madhukar and Swarna. QTLs were mapped using 110 markers in 168 RILs. In all, 26 QTLs were mapped for yield and five related traits on chromosomes 1, 2, 3, 6, 7, 8, 10, 11, and 12. QTL for plant height and days to flowering were co-located between RM23147 - RM337 on chromosome 8. RM251, RM314, and RM1135 were significantly associated with plant height and OsYSL17 was significantly linked with grain yield. Epistatic interaction was detected for plant height and number of tillers. Several candidate genes reported for yield and related traits underlie the QTL regions.