Optical properties and efficiency studies for Beta Vulgarize, Curcuma Longa and Vulgaris var. cicla dye sensitized solar cell

The sun light, that gives the clean, fleckless and cheap energy which is an environmental friend; becomes the demand and on-call of the researchers in the last century.  In this paper, the three natural dyes, namely; (Beta Vulgarize, Curcuma Longa and Vulgaris var. cicla) were successfully and swimmingly synthesized by dissolved in acetone solvent. The optical properties; absorbance, transmission, reflection, absorption coefficient and energy band gap were carefully and solicitously studied using ultra violet visible spectrometer UV.vis. The vibration modes for the three samples were also determined and delimited using Fourier Transform Infra-red spectroscopy FTIR. The efficiency of dye sensitized solar cell DSSC was studied using and utilisation IV characteristic for three natural dyes  (Beta Vulgarize, Curcuma Longa and Vulgaris var. cicla), where the cell was fabricated and processed by coating a conducting proceeding substrate of (FTO) using titanium dioxide TiO2.  The power conversion efficiency was calculated and reckoned, which found to be [0.583, 0.539 and 0.285], respectively. The highest efficiency obtained from this DSSC sensitized by Beta Vulgarize which was 0.583%, and thus might be due to its concentrated, focussed dye and colour.&nbsp

Optical properties and efficiency studies for Beta Vulgarize, Curcuma Longa and Vulgaris var. cicla dye sensitized solar cell

The sun light, that gives the clean, fleckless and cheap energy which is an environmental friend; becomes the demand and on-call of the researchers in the last century.  In this paper, the three natural dyes, namely; (Beta Vulgarize, Curcuma Longa and Vulgaris var. cicla) were successfully and swimmingly synthesized by dissolved in acetone solvent. The optical properties; absorbance, transmission, reflection, absorption coefficient and energy band gap were carefully and solicitously studied using ultra violet visible spectrometer UV.vis. The vibration modes for the three samples were also determined and delimited using Fourier Transform Infra-red spectroscopy FTIR. The efficiency of dye sensitized solar cell DSSC was studied using and utilisation IV characteristic for three natural dyes  (Beta Vulgarize, Curcuma Longa and Vulgaris var. cicla), where the cell was fabricated and processed by coating a conducting proceeding substrate of (FTO) using titanium dioxide TiO2.  The power conversion efficiency was calculated and reckoned, which found to be [0.583, 0.539 and 0.285], respectively. The highest efficiency obtained from this DSSC sensitized by Beta Vulgarize which was 0.583%, and thus might be due to its concentrated, focussed dye and colour.&nbsp

SARS-CoV-2 vaccination modelling for safe surgery to save lives: data from an international prospective cohort study

Background Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling. Methods The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death in 1 year. NNVs were based on postoperative SARS-CoV-2 rates and mortality in an international cohort study (surgical patients), and community SARS-CoV-2 incidence and case fatality data (general population). NNV estimates were stratified by age (18–49, 50–69, 70 or more years) and type of surgery. Best- and worst-case scenarios were used to describe uncertainty. Results NNVs were more favourable in surgical patients than the general population. The most favourable NNVs were in patients aged 70 years or more needing cancer surgery (351; best case 196, worst case 816) or non-cancer surgery (733; best case 407, worst case 1664). Both exceeded the NNV in the general population (1840; best case 1196, worst case 3066). NNVs for surgical patients remained favourable at a range of SARS-CoV-2 incidence rates in sensitivity analysis modelling. Globally, prioritizing preoperative vaccination of patients needing elective surgery ahead of the general population could prevent an additional 58 687 (best case 115 007, worst case 20 177) COVID-19-related deaths in 1 year. Conclusion As global roll out of SARS-CoV-2 vaccination proceeds, patients needing elective surgery should be prioritized ahead of the general population

Mid-infrared response of charge-ordered quasi-1D organic conductors (TMTTF)2X_2X

We investigated the temperature dependence of the charge disproportionation in the charge ordered quasi one-dimensional conductors (TMTTF)$_{2}$AsF$_{6}$ and (TMTTF)$_{2}$PF$_{6}$ by infrared spectroscopy. In the mid-infrared, we observed a splitting of characteristic vibronic modes below the charge-order transition which can be directly linked to the charge disproportionation on the molecules. From our analysis of these modes we extracted the temperature dependence of the charge disproportionation which is much stronger in (TMTTF)$_{2}$AsF$_{6}$ compared to (TMTTF)$_{2}$PF$_{6}$. The charge disproportionation is only weakly affected by the spin-Peierls transition in the AsF$_{6}$ salts and remains basically unchanged in the PF$_{6}$ salts. Therefore, our data confirm that the spin-Peierls and charge-ordered ground state coexist at low temperatures

Design of a 100W bi-directional LCC series-parallel resonant DC-DC converter

SCADA OBJETIVOS PRESENTACIONES MÓDULOS DE UN SISTEMA SCADA CONFIGURACIÓN COMUNICACIÓN INTERFAZ GRÁFICO DEL OPERADOR PROCESO ESQUEMA CONCEPTUAL DE UN SISTEMA SCADA DISPOSITIVOS DE CAMPO INTERFAZ DE USUARIO UNIDAD DE CONTROL REDES DE COMUNICACIÓN INDUSTRIAL MODELO DE COMUNICACIÓN OSI DE ISO MEDIOS DE TRANSMISIÓN TIPOS DE REDES DE COMUNICACIÓN INDUSTRIAL PROTOCOLO DE COMUNICACIÓN INTERFAZ OPC SISTEMAS DE CONTROL CLASIFICACIÓN DE LOS SISTEMAS DE CONTROL SEGÚN SU COMPORTAMIENTO ELEMENTOS DE MEDICIÓN Y TRANSMISIÓN DE UN SISTEMA DISPOSITIVOS DE CONTROL DE UN SISTEM