THE EVOLUTION OF SNP PETROM STOCK LIST - STUDY THROUGH AUTOREGRESSIVE MODELS

Stock exchange market is one of the most dynamic and unpredictable markets. In this context, this work intends to analyze the SNP Petrom shares on the REGS market, based on the chronological series. The economic series are often not stationary, but they can be stationarized by different data transformations. The simplest method used for stationarizing a series is to apply differentiating operators of various classes on the series. After applying this operator, a stationary series that can be modified by an ARIMA (p.q) process is usually obtained. Most time series with economic content include a seasonal component besides the trend and random component. The purpose of this work is to estimate the parameters of an ARIMA (p,d,q) model for SNP Petrom shares, where p is the number of autoregressive terms, d is the integration level of the series (how many times the series must be differentiated in order to become stationary) and q is the number of moving average terms (MA).list, economic series, autoregressive models

THE DIVERSITY OF USEFUL BEETLES FROM THE POBORU ORCHARD ECOSYSTEM, OLT COUNTY

This paper presents data on the abundance and diversity of useful coleopteran species collected in the plum plantation in Poboru, Olt county. The research was carried out in 2022, starting from April to September.During the observation period, research was carried out on the entomofauna of useful coleoptera found in the Poboru orchard ecosystem. This was subjected to an analysis regarding the structure and abundance of useful coleopterans encountered in the studied fruit crop, and they were selected from the total of coleopterans identified and treated separately.Thus, in 2022, 8 species from the Carabidae family, 2 species from the Staphilinidae family and 10 species from the Coccinellidae family were identified.According to the data obtained in 2022, the Coccinellidae family represented 61.12%, the Carabidae family accounted for 28.75% and the Staphilinidae family 10.13%

THE DIVERSITY OF COLEOPTERANS (COLEOPTERA: SCARABAEIDAE, SCOLYTIDAE, CURCULIONIDAE RHYNCHITIDAE) FROM THE PLUM ECOSYSTEMS IN POBORU LOCATION, OLT COUNTY

The present work is dedicated to the research of the current state of the fauna and the diversity of the coleoptera in the plum ecosystems in Poboru, Olt county.As a result of the investigations carried out in 2022, in the North-Eastern area of Olt county, the harmful coleoptera species collected in the analyzed orchard ecosystem were classified into 4 families: Scarabaeidae, Scolytidae, Curculionidae and Rhynchitidae. (P.Pasol, Ionela Dobrin , Loredana Frasin, , Treatise on special entomology, Pests of horticultural crops, 2007, page 209-220). Thus, in 2022, 11 species from the Scarabaeidae family, 3 species from the Scolytidae family, 5 species from the Curculionidae family and one species from the Rhynchitidae family were identified. According to the data obtained in 2022, the Scarabaeidae family represented 36.90%, the Scolytidae family was found in a proportion of 22.62%, the Curculionidae family 38.10%, and the Rhynchitidae family 2.38%

E-learning Platforms and European Digital Society

The current paper emphasizes the role that e-learning platforms play in upskilling and reskilling of the European workforce, thus improving the competitiveness and contributing to a stronger digital landscape. By using a mixed-method approach, combining literature review, document and trend analysis with descriptive statistical analysis, the auhors have examined the relationship between e-learning platforms and the European digital society. The research revealed substantial disparities in digital skill proficiency and online learning adoption among European citizens, emphasizing the need for targeted strategies to boost digital literacy and fully harness the potential of e-learning platforms in improving digital skills. European countries should capitalize on the progress made in the last two years and work towards creating digital educational tools and methods that are of higher quality, more readily available and more inclusive. Although a number of programs and target objectives are in place to support the digitalization of education in Europe, the e-learning platforms still represent an underutilized tool that can help to increase digital skills among European citizens. The potential to improve the digital skills is still high and an extra focus should be granted to the programs that improve these on a national or cross border level. The originality of the article consists of a review of relevant statistics regarding the most recent evolution of online learning and digital skills, along with an examination of the existing frameworks at the European level that have an aim to improve digital education and skills. This research contributes to a better understanding of the complex and expansive nature of e-learning platforms and the European Digital Society and can offer valuable insights to policymakers and other stakeholders such as decision-makers from various organizations, educators and technologist

APPLICATION OF GPS TEHNOLIGY (GLOBAL POSITIONING SYSTEM) IN FOREST INVENTORY STATISTICS

This paper presents a methodology based on the use of GPS technology to identify network sample areas for statistical inventory stands, purposes. The proposed method facilitates the designer's work on the sample location and materialization, working time is reduced significantly because it is no longer necessary to measure distances between sample plots, and the field orientation is much easier and avoids the subjectivity in establishing the centers of sample areas, meaning their quadratic grid. Therefore, using GPS technology in sample surfaces location brings clear improvements to that one presently used for the statistical inventory works of exploitable stands (both for the precision and the duration of execution), so that its practical application is not only useful, but even recommended

IMPACT AND EMERGENCE OF CLIMATE CHANGE ON THE SOCIO-HUMAN ENVIRONMENT

In this paper we will consider how the environment affects man, both from a social perspective, in the sense of daily life, and from an economic perspective, in the sense of technological changes that can affect the biodiversity of the environment. In the first part we will approach some philosophical perspectives on human nature and the way in which the environment outlines the society as well as the individual. Furthermore, we will highlight the effects on the environment, the adaptability of both man and the animal and plant kingdom alike - having as reference the O.N.U Conference of 2015 Parties

Salvia officinalis L. extract increase the antitumor effect of Doxorubicin on Ehrlich carcinoma tumor cells

The current study demonstrated the superior in vivo antitumor activity of the association between Salvia officinalis L. and Doxorubicin as compared with Doxorubicin alone and its lack of toxicity. The study was carried out on 32 Mus musculus female mice, for 14 days long. The tumor model was Ehrlich Ascites Carcinoma (EAC). Animals were divided in four equal groups of 8 mice: normal control, tumor control, EAC + doxorubicin and EAC + doxorubicin + Salvia officimalis L. All the values that reflect the tumor development (difference in body weight, EAC volume and cellular concentration) were improved in significant manner. Hematological and biochemistry parameters determination were performed for all four groups of mice and no cytotoxicity was found. The efficacy of Salvia officinalis L. as an adjuvant therapy in cancer has been demonstrated

Synthesis and characterization of jellified composites form bovine bone-derived hydroxyapatite and starch as precursors for robocasting

Hydroxyapatite–starch composites solidify rapidly via jellification, making them suitable candidates for robocasting. However, many aspects related to hydroxyapatite powder characteristics, hydroxyapatite–starch interaction, and composites composition and properties need to be aligned with robocasting requirements to achieve a notable improvement in the functionality of printed scaffolds intended for bone regeneration. This article presents a preliminary evaluation of hydroxyapatite–starch microcomposites. Thermal analysis of the starting powders was performed for predicting composites’ behavior during heat-induced densification. Also, morphology, mechanical properties, and hydroxyapatite–starch interaction were evaluated for the jellified composites and the porous bodies obtained after conventional sintering, for different starch additions, and for ceramic particle size distributions. The results indicate that starch could be used for hydroxyapatite consolidation in limited quantities, whereas the composites shall be processed under controlled temperature. Due to a different mechanical behavior induced by particle size and geometry, a wide particle size distribution of hydroxyapatite powder is recommended for further robocasting ink development