TEMPERATURE CAPTURE AND IMAGE PROCESSING SYSTEM: A CASE STUDY

https://doi.org/10.52326/jes.utm.2022.29(2).10

UDC [621.397.424:772.96+004.93]:616.98:578.834.1

Daniela Istrati

Abstract. This paper describes a technical solution to stop the spread of COVID-19 by creating a system consisting of a video camera with a thermal sensor connected to a web-based platform, which would help to manage to restrict access of people who have fever into a building. The main purpose of the project system is to measure body temperature, to detect and to recognize the person that has at the moment or had fever in the past 14 days, the registration in the database of both the fever and the person, and validate the access of the person in the building if it has a temperature below 37 degrees Celsius. The technical details as analysis and determination of the domain of interest, development of the new system design, functional and non-functional requirements, interface, project planning, technical specification and quality of the proposed solution are discussed. The proposed system aims to reduce the number of employees responsible for collecting the temperature, thus no longer exposing them to the risk of infection.

Keywords: covid-19, thermal camera, body temperature, OpenCV library, activity diagram, user interface.

Full Text (PDF): Download

COMPRESSION STRENGTHS CORRESPONDENCE OF CONCRETES ACCORDING TO THEIR CLASSES AND MARKS

https://doi.org/10.52326/jes.utm.2022.29(2).11

UDC 691.32:006

Gheorghe Croitoru

Abstract. The article presents the problems related to the application of the provisions of the new European standards EN for concrete production, after the withdrawal of the obsolete national standards GOST regarding the correspondence of the classes to the concrete marks. In the context of the application of harmonized standards, there has been a need to establish the correspondence of classes to concrete marks, in order to help design and construction companies to correctly establish the strength mark of concrete to the corresponding class of concrete. The concrete class establishes the normative resistance of concrete for the calculation of constructions, for the service limit state, the prismatic resistance to compression adopted as normative resistance. The ratio between concrete classes and marks, in terms of compressive strength, is determined by the normative coefficient of variation V = 13.5%. The degree of homogeneity of the quality of the concrete is determined according to the values of the standard deviation σ and the average compressive strength of the concrete. As a result of the research, intermediate classes of concrete have been identified, which are not indicated in the normative documents, related to the production of concrete.

Keywords: basic parameters, coefficient of variation, compliance criteria, concrete class, concrete mark, compression strength, correspondence, medium values, standard deviation.

Full Text (PDF): Download

UPDATING THE STATISTICAL REGISTER OF HOUSING IN THE REPUBLIC OF MOLDOVA USING OPEN-SOURCE GIS TECHNOLOGIES

https://doi.org/10.52326/jes.utm.2022.29(2).12

UDC 332.87:311.21:04.6+312] (478)

Mihail Spataru, Ana Vlasenco, Livia Nistor-Lopatenco, Vasile Grama

Abstract. This article describes the possibilities of promoting and implementing open-source geoinformation technologies in the field of statistical activity in the Republic of Moldova, which will simplify and streamline the process of analysis, collection, systematization of data, as well as their dissemination. Since 2019, the National Bureau of Statistics of the Republic of Moldova, according to the recommendations of the United Nations, has proposed the creation of the geo-coded Statistical Register of Housing (SRH). With the creation of the National Spatial Data Infrastructure (NSDI), this goal can be achieved, as SRH will form the basis of the Population and Housing Census (PHC) from the 2020 round. The geospatial data from SRH will be used to delimit the census enumeration areas, and the reviewed population will be attached to the geographical coordinates of the dwelling. These enumeration areas will cover the entire territory of the Republic of Moldova and will serve to plan human resources, organize field activities and ensure the full coverage of census units (for people, households and dwellings).

Keywords: Statistical Register of Housing (SRH), Geographic Information Systems (GIS), Population and Housing Census (PHC), QGIS, QField.

Full Text (PDF): Download

PERSPECTIVES FOR THE USE OF BIOMASS GENERATED BY SOME MISCANTHUS GENOTYPES IN THE PRODUCTION OF DENSIFIED SOLID BIOFUELS

https://doi.org/10.52326/jes.utm.2022.29(2).13

UDC 620.95:633.282

Nicolae Daraduda, Grigore Marian

Abstract. Miscanthus is a Poaceae family perennial crop of C4 bioenergy characterized by the multilateral use potential, including the production of biofuels. The paper aimed to study the opportunity to use the biomass generated by two Miscanthus genotypes: Miscanthus × giganteus and Miscanthus sinensis in the production of densified solid biofuels. We quantified the biomass generated by crops that were 5 years old, harvested from both genotypes after the vegetation period, the year 2020. Samples were taken from the experimental lots of the Alexandru Ciubotaru National Botanical Garden (Institute) from the Republic of Moldova in autumn, immediately after the initial onset of senescence and in spring of the following year, before the start of the growing season. The results showed that the above-ground biomass generated by both Miscanthus genotypes harvested in spring had had significantly higher quality characteristics compared to the biomass harvested in autumn. Virtually all qualitative indices of the Miscanthus × giganteus biomass harvested in spring comply with the requirements of the ENPlus international standards for densified solid biofuels. The Miscanthus sinensis biomass, both, had lower indices than the Miscanthus × giganteus biomass from both qualitative and quantitative points of view and the former can be used as a filler in various mixtures of raw material for the production of solid biofuels.

Keywords: energy crops, Miscanthus x giganteus Titan, Miscanthus sinensis, biomass properties

Full Text (PDF): Download

SYNTHESIS AND IMPLEMENTATION OF BIOGAS PRODUCTION IN WASTEWATER TREATMENT PLANT

https://doi.org/10.52326/jes.utm.2022.29(2).14

UDC 662.767.2:628.33

Artiom Moldovan

Abstract. In this paper, the problem was to carry out a study on the process of mass production of biogas and to deduce the analysis of an example implemented in the wastewater treatment plant. The main problem is the correct processing of the activated sludge and the extraction of the biogas with its basic components. The method described in the paper is current as a technology in the biogas production industry by treating activated sludge from a wastewater treatment plant. For the extraction of biogas according to EU standards and the possibility to use it at each stage of extraction, methods and technologies specific to this process are used and explained.

Keywords: biogas, desulphurization, gas flare, co-generation unit, PLC, SCADA, automatic control.

Full Text (PDF): Download

TECHNOLOGICAL INNOVATIONS AS DRIVERS OF RETAIL 4.0 – HOW RFID COULD IMPROVE RETURNABLE BOTTLE LOGISTICS IN THE GERMAN BEVERAGE INDUSTRY

https://doi.org/10.52326/jes.utm.2022.29(2).15

UDC 621.798.147:339.37:004 (430)

Stan Lukas Bührdel, Patrick Siegfried

Abstract. This research paper discusses how RFID technology could improve current deposit bottle logistic processes in food retailing and which obstacles impede successful implementations. Research Methodology include desk research: Library, EBSCOhost, wiso.net, Google Scholar, Scientific Journals, Statista, SpringerLink. Implementation of RFID is potentially beneficial, but same obstacles remain outlook. To validate the conclusion further studying and practical proof of concept are necessary. Contributions: supply chain management, return logistics, food retail, beverage industry.

Keywords: deposit bottle, food retailing, return logistics, reusable packaging, RFID.

Full Text (PDF): Download

THE INFLUENCE OF MICROORGANISMS ON BEER QUALITY

https://doi.org/10.52326/jes.utm.2022.29(2).16

UDC 663.4:573.4

Aliona Sclifos, Iurie Scutaru

Abstract. The paper investigated the influence of microorganisms on the quality of Oettinger and Timișoreana beer, in the context of improving the manufacturing methodology of the finished product. Two types of yeast were used for fermentation: Oettinger and SAB-5. At the end of the fermentation process, the microbiological sample was selected to determine the anaerobic bacteria harmful to the beer. Various methods of seeding and sampling were analyzed, such as seeding on several types of media: Wort, Endo and NBB-A, media used to determine the types of microorganisms present at each stage of production. As the level of free amino acids (FAN) is a significant indicator of the completion of the fermentation process, the influence of FAN on the dissociation of yeast and diacetyl content was also analyzed. Subsequently, at the end of the fermentation process, microbiological growths were determined.
Keywords: OT-Oettinger and TM-Timișoreana beer, microorganisms, yeast, culture media, bacteria Pectinatus, FAN – free amino acids.

Full Text (PDF): Download