Techno-economical Analysis of Hybrid PV-WT-Hydrogen FC System for a Residential Building with Low Power Consumption

This paper shows a techno-economical analysis on performance indicators of hybrid solar-wind-hydrogen power generation system which supply with electricity a low - energy building, located in Cluj-Napoca. The case study had the main objectives, as follows: cost estimation, evaluation of energy and environmental performance for a fuel cell integrated into a small-scale hybrid system power generation and estimation of electrolytic hydrogen production based on renewable energy resources available on the proposed site. The results presented in this paper illustrate a case study for location Cluj-Napoca. The wind and solar resource can play an important role in energy needs for periods with "peak load" or intermittent energy supply. However, hydrogen production is dependent directly proportional to the availability of renewable energy resources, but the hydrogen can be considered as a storage medium for these renewable resources. It can be said that this study is a small-scale model analysis, a starting point for a detailed analysis of Romania's potential electrolytic production of hydrogen from renewable resources and supply electricity using fuel cells integrated into hybrid energy systems

How to assess the acceptance of an electronic health record system?

Being able to access a patient’s clinical data in due time is critical to any medical setting. Clinical data is very diverse both in content and in terms of which system produces it. The Electronic Health Record (EHR) aggregates a patient’s clinical data and makes it available across different systems. Considering that user’s resistance is a critical factor in system implementation failure, the understanding of user behavior remains a relevant object of investigation. The purpose of this paper is to outline how we can assess the technology acceptance of an EHR using the Technology Acceptance Model 3 (TAM3) and the Delphi methodology. An assessment model is proposed in which findings are based on the results of a questionnaire answered by health professionals whose activities are supported by the EHR technology. In the case study simulated in this paper, the results obtained showed an average of 3 points and modes of 4 and 5, which translates to a good level of acceptance.The work has been supported by FCT – Fundação para a Ciência e Tecnologia within the Project Scope: UID/CEC/00319/2019.The work has been supported by FCT – Fundação para a Ciência e Tecnologia within the Project Scope DSAIPA/DS/0084/2018

The reverse engineering construction of 3D models using the virtual reality

The present paper describes the development of a virtual reality application for reconstructing 3D models from data that comes from a computed tomography system. This application reconstructs the upper part of a 3D model by overlying volume elements into points given by images from the scanner

Vibrational spectroscopic investigations and density functional theory calculations on trans-diaquabis(picolinato)zinc(II) dihydrate complex

FT-Raman and FT-infrared spectra of pyridine-2-carboxylic acid (picolinic acid) and its corresponding trans-diaquabis(picolinato)zinc(II) dihydrate complex were recorded. Density functional theory was used in order to calculate the optimized geometries and harmonic vibrational wavenumbers of the coordination compound and its isolated ligand. The calculation for the complex was performed under Ci symmetry constraints and all 93 vibrational modes were classified as either Raman active (ag symmetry) or infrared active (au symmetry). The assignment of the characteristic bands was performed by using the calculated harmonic wavenumbers and their Raman intensities. The agreement between the calculated and experimental values of both the structural parameters and the vibrational modes was fairly good. The influence of metal coordination on the picolinic acid was monitored by the wavenumber shift of certain marker bands and the appearance of new vibrational bands

ON ABOUT DESIGN AND IMPLEMENTATION OF A HARVESTER FOR FRENCH AND ENGLISH MARIGOLD

Abstract: The construction of a harvester-device for Calendula officinalis and Tagetes patula was proposed and is presented. The prototype development took into consideration the following aspects of medicinal plants of interest: length of plant, flower width, average distance between plants (0.20-0.30 m Calendula officinalis and 0.25-0.30 m Tagetes patula). A constructive testing was performed in order to choose the best constructive solution taking into account the following aspects: efficacy of flowers harvester, quality of flowers (number of integral flowers recuperated from a stem), device mass, energetic input per recuperated flowers, facile manipulation. According to the result of constructive testing, the harvester device was developed and tested in field. Good performances were obtained for Calendula officinalis (a ratio of flowers recuperation of 70-80%) and satisfactory for Tagetes patula (a ratio of flowers recuperation of 60-70%)