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Generalized switched-capacitor multilevel inverter topology with self-balancing capacitors
Jena, Kasinath,Panigrahi, Chinmoy Kumar,Gupta, Krishna Kumar,Kumar, Dhananjay,Dewangan, Niraj Kumar The Korean Institute of Power Electronics 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.9
This paper presents a switched-capacitor topology with fewer switching components and reduced voltage stresses. The circuit contains eight switches and two capacitors to generate a five-level voltage waveform. This paper provides in-depth descriptions of the structural design, operation, and loss analysis. Inherently self-balanced capacitors are utilized in the proposed topology, which eliminates the need for additional charge balancing circuits and sensors. The control action was implemented using a simple logic-based multicarrier pulse width modulation (PWM) strategy. A brief comparative analysis with state-of-the-art topologies has been presented to demonstrate the merits of the developed topology. Finally, the feasibility and efficacy of the suggested topology have been evaluated using simulation and experimental testing to ensure that it is both feasible and effective.
Effect of magnesium sulphate solution on compressive strength and sorptivity of blended concrete
Jena, Trilochan,Panda, Kishor C. Techno-Press 2020 Advances in concrete construction Vol.9 No.3
This paper reports on the result of an experimental investigation carried out to study the compressive strength and sorptivity properties of blended cement concrete exposed to 5% and 10% MgSO<sub>4</sub> solution using fly ash (FA) and silpozz. Usually in sulphate environment the minimum grade of concrete is M30 and the mix design is done for target mean strength of 39 MPa. Silpozz is manufactured by burning of agro-waste rice husk in designed furnace in between 600° to 700℃ which is one of the main agricultural residues obtained from the outer covering of rice grains during the milling process. There are four mix series taken with control mix. The control mix made 0% replacement of FA and silpozz with Ordinary Portland Cement (OPC). The first mix series made 0% FA and 10-30% replacement of silpozz with OPC. The second mix series made with 10% FA and 10-40% replacement of silpozz with OPC. The third mix series made 20% FA and 10-30% replacement of silpozz with OPC and the fourth mix series made 30% FA and 10-20% silpozz replaced with OPC. The samples (cubes) are prepared and cured in normal water and 5% and 10% MgSO<sub>4</sub> solution for 7, 28 and 90 days. The studied parameters are compressive strength and strength deterioration factor (SDF) for 7, 28 and 90 days. The water absorption and sorptivity tests have been done after 28 days of normal water and magnesium sulphate solution curing. The investigation reflects that the blended cement concrete incorporating FA and silpozz showing better resistance against MgSO<sub>4</sub> solution when compared to normal water curing (NWC) samples.
Long-term and blow-up behaviors of exponential moments in multi-dimensional affine diffusions
Jena, R.P.,Kim, K.K.,Xing, H. North-Holland Pub. Co ; Elsevier Science Ltd 2012 Stochastic processes and their applications Vol.122 No.8
This paper considers multi-dimensional affine processes with continuous sample paths. By analyzing the Riccati system, which is associated with affine processes via the transform formula, we fully characterize the regions of exponents in which exponential moments of a given process do not explode at any time or explode at a given time. In these two cases, we also compute the long-term growth rate and the explosion rate for exponential moments. These results provide a handle to study implied volatility asymptotics in models where log-returns of stock prices are described by affine processes whose exponential moments do not have an explicit formula.
Jena, Karmabeer,Pandey, Jay Prakash,Sinha, Ajit Kumar Korean Society of Sericultural Science 2014 International Journal of Industrial Entomology Vol.28 No.2
This study was designed to find out the effect of Nosema spore on oxidative damages and antioxidant defence in the midgut of tasar silkworm Antheraea mylitta. Higher level of lipid peroxidation (LPX) and total hydroperoxides indicate the resultant oxidative stress in the Nosema exposed specimen. Increased superoxide dismutase (SOD) suggests activation of physiological mechanism to scavenge the superoxide radical produced during Nosema infection. Higher activities of catalase and glutathione-S-tranferase on $18^{th}$ d indicate adaptive behaviour of the tissue against oxyradicals. The results suggest that Nosema infection is involved in altering the active oxygen metabolism by modulating LPX and reactive oxygen species (ROS), which is indicative of pebrine disease disorder.
Chlorococcales (Chlorophyceae) of Eastern and North-eastern States of India
Jena, Mrutyunjay,Adhikary, Siba Prasad The Korean Society of Phycology 2007 ALGAE Vol.22 No.3
Fifty-six taxa of chlorococcales were recorded from different water bodies of eastern and north-eastern states of India. These belong to 21 genera, e.g. Chlorococcum (1), Truebaria (1), Pediastrum (9), Hydrodictyon (1), Botrycoccus (1), Coenochloris (1), Radiococcus (1), Coenocystis (1), Oocystis (1), Glaucocystis (1), Chlorella (1), Kirchneria (2), Kirchnereilla (1) Ankistrodesmus (10), Coelastrum (3), Actinastrum (2), Tetrastrum (1), Crucigenia (1), Crucigeniella (1) Desmodesmus (6) and Scenedesmus (9). All these species were recorded first time from this region and out of these 16 species reported first from India.
Jena Lee,Yujin Suh 한국지역사회간호학회 2023 지역사회간호학회지 Vol.34 No.4
Purpose: This cross-sectional study aimed to describe subjective health status of people with chronic kidney disease (CKD), identify factors that affect good subjective health status and investigate the relationship between good subjective health status and health-related quality of life (HRQOL) in people with CKD. Methods: This secondary analysis utilized data from the Korean National Health and Nutrition Examination Survey in 2019-2020. Participants (N=295) had an eGFR of ≤59 mL/min/1.73 ㎡. Descriptive and inferential statistics were used to analyze the data. Univariate and multivariate logistic regression analyses were performed to identify factors affecting good subjective health status and examine the association between good subjective health status and HRQOL. Results: Among all participants, 61.4% had good subjective health status, and the HRQOL index was 0.88 in people with CKD. Household income, activity limitation, stress, and the number of comorbidities in people with CKD were associated with good subjective health status. People with better subjective health status were more likely to be satisfied with self-care, usual activities, and pain/discomfort in HRQOL. Conclusion: Good subjective health status is associated with better HRQOL. Therefore, subjective health status should be assessed early, and a nursing intervention program should be developed considering factors that can improve subjective health status in people with CKD.
Jena, Pratap Kumar,Kishore, Jugal,Jahnavi, G. Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6
Background: Cigarette per day (CPD) use is a key smoking behaviour indicator. It reflects smoking intensity which is directly proportional to the occurrence of tobacco induced cancers. Self reported CPD assessment in surveys may suffer from digit bias and under reporting. Estimates from such surveys could influence the policy decision for tobacco control efforts. In this context, this study aimed at identifying underlying factors of digit bias and its implications for Global Adult Tobacco Surveillance. Materials or Methods: Daily manufactured cigarette users CPD frequencies from Global Adult Tobacco Survey (GATS) - India data were analyzed. Adapted Whipple Index was estimated to assess digit bias and data quality of reported CPD frequency. Digit bias was quantified by considering reporting of '0' or '5' as the terminal digits in the CPD frequency. The factors influencing it were identified by bivariate and logistic regression analysis. Results: The mean and mode of CPD frequency was 6.7 and 10 respectively. Around 14.5%, 15.1% and 15.2% of daily smokers had reported their CPD frequency as 2, 5 and 10 respectively. Modified Whipple index was estimated to be 226.3 indicating poor data quality. Digit bias was observed in 38% of the daily smokers. Heavy smoking, urban residence, North, South, North- East region of India, less than primary, secondary or higher educated and fourth asset index quintile group were significantly associated with digit bias. Discussion: The present study highlighted poor quality of CPD frequency data in the GATS-India survey and need for its improvement. Modeling of digit preference and smoothing of the CPD frequency data is required to improve quality of data. Marketing of 10 cigarette sticks per pack may influence CPD frequency reporting, but this needs further examination. Exploring alternative methods to reduce digit bias in cross sectional surveys should be given priority.