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Satabdi Bhattacharaya,Susovon Samanta 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.10
The design and development of a non-isolated buck-based three-port dc–dc converter for medium-power standalone PV systems are presented in this paper. The topology is obtained from a parallel connection of conventional buck and boost converters. An attractive feature of this converter is the implementation of a buck topology at the PV side, which ensures cost-effective PV panel wiring, reduced converter development cost, and better efficiency of the PV system during low irradiation periods when compared to its boost counterpart. The proposed converter includes three operating modes based on load power requirements and PV power generation. An autonomous mode transition algorithm is proposed for seamless transitions between various operating modes. The design methodology, losses, and operation of the converter are discussed in this paper. A low-cost and efficient 2 kW laboratory prototype model of the proposed converter has been developed. Experimental validations are provided to showcase the effectiveness and viability of the proposed converter under various operating conditions.
Is Familiality Associated with Downward Occupation Drift in Schizophrenia?
Triptish Bhatia,Satabdi Chakraborty,Pramod Thomas,Amina Naik,Sati Mazumdar,Vishwajit L Nimgaonkar,Smita N Deshpande 대한신경정신의학회 2008 PSYCHIATRY INVESTIGATION Vol.5 No.3
Objective-Downward occupational drift has been extensively investigated in schizophrenia. It is known that certain illness related factors, such as severity, affect drift, but the impact of familial factors has not been investigated. Methods-Occupation drift was studied among patients with schizophrenia/schizoaffective disorder (SZ/SZA)(n=523) and 130 affected sib pairs (ASPs). Drift was analyzed in relation to familiality as well as demographic and clinical variables. For comparison one proband (one of the affected siblings) from each ASP was selected. Occupation drift was measured in relation to the most responsible job held, and with regard to head of the household (HOH) occupation status. Results-There was no significant difference between single affected and ASP probands in terms of occupational drift from the most responsible job (drifted 39.2% and 38% respectively) and with regard to HOH’s occupation (drifted 88% and 82.8% respectively). A significant part of the sample remained unemployed in both single affected and ASP samples. Thus, there was no significant impact of familiality on these variables. However, marital status, pattern of severity, age at onset, gender were found to be associated with downward occupation drift in single affected probands while the only significant factor in familial probands was pattern of severity of severity when measuring in terms of downward drift from most responsible job. Conclusion-Though there is occupation drift in schizophrenia, there is no detectable impact of familial factors. Employment is associated with severity of delete.
Enhanced visualization of the root canal morphology using a chitosan-based endo-radiopaque solution
Govind Shashirekha,Jena Amit,Pattanaik Satabdi,Anarasi Mahaprasad,Mohapatra Satyajit,Shivagange Vinay 대한치과보존학회 2021 Restorative Dentistry & Endodontics Vol.46 No.3
Objectives: This study aimed to investigate the efficacy of ionic and non-ionic-based contrast media (in vitro study) and the combinatorial effect of chitosan-based endo-radiopaque solution (CERS) (in vivo study) for visualization of the root canal anatomy. Materials and Methods: In vitro study (120 teeth): The root canal of maxillary premolars and molars (in vitro group 1 and 2 respectively, n = 60 each) were analyzed using 4 different contrast media (subgroups: Omnipaque 350, Iopamidol, Xenetix 350, and Urografin 76; n = 15 each) in combination with 5.25% sodium hypochlorite (NaOCl). Based on the results of the in vitro study, in vivo study (80 teeth) was done to compare Xenetix 350 + 5.25% NaOCl with CERS (in vivo group 1 and 2 respectively, n = 40 each) on maxillary and mandibular premolars and molars. Two endodontists used radiovisiography to assess the depth of ingress and identify the aberrant root anatomy after access cavity preparation, and after initial cleaning and shaping of canals. Kruskal-Wallis test was used for in vitro comparison (p < 0.05), and Wilcoxon signed-rank test and Mann-Whitney U test for in vivo analysis (p < 0.01). Results: In vitro study, Xenetix 350 + 5.25% NaOCl facilitated a significant higher visualization (p < 0.05). For in vivo study, CERS had a statistically significant depth of ingress (p < 0.01), and was efficient in identifying the aberrant root canal anatomy of premolars and molars. Conclusions: CERS facilitates better visualization of the root canal anatomy of human premolars and molars.