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INFLUENȚA TRATAMENTELOR CU CALCIU ASUPRA INDICILOR FIZIOLOGICI AI SOIULUI DE STRUGURI PENTRU MASĂ MOLDOVA
Get PDFProper fertilization of vineyards represents an important component of viticultural technology that can have a significant impact on the quality and quantity of grapes harvests. Rational use of fertilizers contributes to the development of a healthy vineyards, leading to enhanced yields and quality production. This study focuses on Moldova table grape variety, characterized by a late ripening period in late September and a productivity range of 17-18 t/ha. The research investigates the effects of calcium treatments on the physiological parameters of grapevine plants, as well as the quality and quantity of grape yield. Research findings lead to the following conclusions: Calcium treatments directly influence physiological indices of grapevines. The variants with a higher number of treatments recorded maximum values of chlorophyll content index and berries firmness (particularly variant 10 with 4 treatments, followed by variants with 3, 2 and 1 treatments). Calcium treatments significantly affect the chlorophyll content index and berry firmness, with lesser impact observed on other agrobiological characteristics of the variety.
Fertilizarea corectă a viilor este o componentă crucială a tehnologiei viticole care poate avea un impact semnificativ asupra calității și cantității recoltelor de struguri. Utilizarea rațională a îngrășămintelor contribuie la dezvoltarea unei plantații sănătoase, cu randamente bune și cu o producție de calitate. Obiectul de studiu a fost soiul Moldova, care este un soi de struguri de masă cu o perioadă de coacere târzie, sfârșit de septembrie, cu o productivitate de 17-18 t/ha. S-a evaluat influența tratamentelor cu calciu asupra indicilor fiziologici ai plantelor de viță-de-vie și asupra calității și cantității recoltei de struguri. În rezultatul cercetărilor se fac următoarele concluzii: 1. Tratamentele cu calciu au influențat direct indicii fiziologici ai viței de vie. 2. Variantele cu un număr mai mare de tratamente au înregistrat valori maxime ale indicelui de conținut a clorofilei și a fermității boabelor (varianta 10 cu 4 tratamente, urmată de variantele cu 3, 2 și 1 tratamente). 3. Tratamentele cu calciu au determinat un nivel de semnificație înalt ca influență asupra indicelui de conținut a clorofilei și a fermității boabelor, și mai puțin asupra celorlalte caracteristici agrobiologice ale soiului
METODA DE DETERMINARE A SUPRAFEȚEI DE FRUNZE LA SPECIA CIREȘ (PRUNUS AVIUM L.)
Get PDFThe paper presents a comparative analysis of the existing methods for determining the leaf area of fruit trees and proposes a calculation model using simple and non-destructive techniques. The research was carried out on the Regina sweet cherry variety, grafted on Maxma 14, planted at the distance of 5x3 m. To determine the surface of leaf apparatus, a calculation model was used based on the average surface of a leaf and the average number of leaves per 1 linear meter in the volume of the crown. The average area of a leaf was calculated by the gravimetric method. To determine the average number of leaves per 1 linear meter, measurements were made with a 1m ruler in the volume of the crown. The ruler was placed twenty times at different angles from the vertical and each time the leaves were counted along the length of the ruler. The actual volume of the crown was determined by the height of the crown, the width in the central part of the crown, as well as the distance between tree rows. Based on the obtained data the following was calculated: 1) leaf area, 2) ratio between leaf area and crown projection area, 3) ratio between the total surface area of leaves and orchard area.
Lucrarea prezintă o analiză comparativă a metodelor existente de determinare a suprafeței frunzelor la plantele pomicole și propune un model de calcul folosind tehnici simple și nedistructive. Cercetările s-au efectuat la soiul de cireș Regina, altoit pe Maxma 14, plantat la distanța de 5x3 m. Pentru determinarea suprafeței aparatului foliar s-a utilizat un model de calcul bazat pe suprafața medie a unei frunze și pe numărul mediu de frunze pe 1 metru liniar în volumul coroanei. Aria medie a unei frunze a fost calculată prin metoda gravimetrică. Pentru determinarea numărului mediu de frunze pe 1 metru liniar s-au efectuat măsurări cu rigla de 1 m în volumul coroanei. Rigla a fost plasată de douăzeci ori în unghiuri diferite față de verticală și de fiecare dată s-au numărat frunzele pe lungimea riglei. Volumul real al coroanei s-a determinat în funcție de înălțimea coroanei, de lățimea în partea centrală a coroanei, precum și de distanța dintre rândurile de pomi. În baza datelor obținute s-a calculat: 1) suprafața foliară, 2) suprafața foliară raportată la suprafața proiecției coroanei, 3) raportul dintre suprafața totală a frunzelor și suprafața livezii
ACTIVITATEA INOVAȚIONALĂ A ÎNTREPRINDERILOR AGRICOLE DIN REPUBLICA MOLDOVA ÎN CONTEXTUL PREOCUPĂRII PENTRU PERFORMANȚĂ
Get PDFThe purpose of the research was to evaluate the agricultural enterprises` innovative activity, as a factor of the economic performance and a premise for ensuring the economic and social prosperity of the state. The basic objectives consisted of: a) arguing the role of innovations in ensuring performance in agriculture; b) evaluating the dynamics of performance indicators in agriculture; c) the analysis of the innovative activity of the agricultural enterprises and the identification of directions for its rationalization. The research methodology included: bibliographic study, statistical economic analysis, opinion survey method, generalization, deduction. As a result of the research, it was found that most of the companies analyzed carried out innovative activities during the reference period, the product innovations and the process and product innovations substantially predominating. At the same time, there is an insufficient approach to innovations in organizational and marketing methods. Consequently, we deduce the need to intensify the innovative activity by the agricultural enterprises, as well as the inclusion of the organizational and marketing aspects in the area of innovative interests, the latter having a significant role in ensuring the entities’ performance and competitiveness.
Scopul cercetării a constat în evaluarea activității inovaționale a întreprinderilor agricole, în calitate de factor al performanței economice și premisă pentru asigurarea prosperității economice și sociale a statului. Obiectivele de bază au constat în: a) argumentarea rolului inovațiilor în asigurarea performanței în agricultură; b) evaluarea dinamicii indicatorilor de performanță la nivel de ramură; c) analiza activității inovaționale a întreprinderilor agricole și identificarea direcțiilor de raționalizare a acesteia. Metodologia cercetării a inclus: studiul bibliografic, analiza economico-statistică, sondajul de opinie, generalizarea, deducția. În rezultatul cercetării s-a constat că majoritatea întreprinderilor analizate au realizat activități inovaționale în perioada de referință, predominând substanțial inovațiile de produs și inovațiile de proces și produs. Tot odată, se atestă o abordare insuficientă a inovațiilor de organizare și de marketing. În consecință, deducem asupra necesității intensificării activității inovaționale a întreprinderilor agricole, precum și cuprinderea în aria de interese inovaționale a aspectelor organizaționale și de marketing, ultimele având un rol semnificativ în asigurarea performanței și competitivității entităților
TECHNOLOGICAL TRANSFER UNDER THE CONDITIONS OF DIGITALIZATION OF PRODUCTS AND PROCESSES
Get PDFTechnological development is largely determined by technology transfer, which is conditioned by the absorption capacity of new technologies, and new technologies are deeply digitized technologies. Success depends on creating basic digital skills, both technical and human, developing digital infrastructure, ensuring accessibility to digital technologies. In the context of Industry 4.0 technologies, the efforts to design products with pronounced physical-cybernetic elements are important, but especially those aimed at creating digital twins, gradually moving from intermediate variants of digital model and digital shadow. Digital twin creation models refer to the life cycle with emphasis on its stages. The paper proposes a digital twin model based on the technological function, in which the modification of the properties is manifested by restructuring the internal functions of the operator, operand and interface. The central place in this model belongs to the interface, which reflects the multitude of physical-technical processes at different scales of macro, meso, micro analysis characteristic of objects and processes in machine building
MEAN-OF-2-4 QUICKSORT
Get PDFBy combining the Median-of-three and Regrouping-3 quicksort methods, the Joint quicksort is proposed, largely free from the shortcomings of the first two. For example, the time complexity of Joint quicksort, in case of lists of n equal elements, is O(n). Analysis of the dependence of Quicksort time complexity on the ratio of the derived sublist sizes shows a relatively slow increase in sorting time as the ratio in question decreases from 0.5 to 0.1. The proposed category of Mean-of-K (MeK) sorting algorithms provides for the determination of pivot elements as the mean of K elements. It is shown that, in terms of sorting time, at K ∈ [1, 4] and size r of the list/sublist of elements to be sorted, it is convenient to use (roughly): Insertion sort at r ≤ 9, Me2 quicksort at 10 ≤ r ≤ 21, Me3 quicksort at 22 ≤ r ≤ 46, and Me4 quicksort at r > 46, yielding the Mean-of-2-4 quicksort method. It was found that the determination of pivot elements in the Median-of-three method requires more calculations than in the Mean-of-3 method; respectively, using Mean-of-3 method could also reduce sorting time. Of course, Mean-of-2-4 method could reduce this duration even further
FLEXIBLE SYNCHRONOUS REGULATION OF POWER ELECTRONIC BLOCKS OF TRANSFORMER-BASED PHOTOVOLTAIC STATIONS
Get PDFThe paper presents the results of developing a scheme for synchronous pulse-width modulation (PWM) of signals in dual voltage source diode-clamped inverters (VSDCIs) used in grid-tied, transformer-based photovoltaic (PV) stations. This scheme is based on the continuous regulation of the switching frequency of the inverters relative to the magnitude of the DC voltages of the PV strings, ensuring equivalence of switching losses across each inverter. The proposed control and PWM techniques ensure the elimination of even-order harmonics and subharmonics in spectra of voltage at inverter-side windings of power transformer, helping to increase the operating efficiency of inverter-based PV stations. Simulation results showed a behavior of operation of dual-VSDCI-based PV installations with the proposed control strategy
ANTHOCYANINS – METHODS OF EXTRACTION AND STABILIZATION
Get PDFAnthocyanins, natural pigments present in plants which are of interest among researchers due to their antioxidant qualities and potential therapeutic advantages in certain contexts. Their occurrence in fruits, vegetables, and blossoms attributes to their unique hues. Once obtained, the dyes extracted from berries can serve as natural coloring agents in a variety of food items, displacing artificial dyes. Moreover, the antioxidative characteristics of anthocyanins position berry dyes as potential sources of functional components for creating healthier food alternatives. Overall, the extraction of pigments from berries shows considerable promise for both the food sector and health-conscious consumers. In this context, emphasis is placed on the identification of advantageous extraction methods from the point of view of the quality of the biologically active compounds obtained, the extraction yield and the impact of the respective methods on the environment. Directing the technological parameters for obtaining storage-stable phytochemical compounds is also important. The purpose of this paper is to deepen the methods of anthocyanin extraction, their advantages and disadvantages together with the condition of the berries subjected to the extraction processes. Moreover, it analyzes the stabilization methods of phytochemical compounds during storage and their use in the food industry
INSURANCE DEVELOPMENTS IN THE LIGHT OF DATA USE
Get PDFInsurance companies are increasingly utilizing large sets of data and artificial intelligence for the purpose of evaluating risks and tailoring insurance products within the framework of insurance contracts. This research seeks to examine the effects of employing extensive data in insurance contracts, particularly concerning privacy and risk. It aims to assess the extent to which existing legal regulations can safeguard policyholders from potential mistreatment resulting from the use of such methodologies. The study concludes that despite the safeguards offered by data and consumer protection laws, the unregulated and unconstrained application of data analytics and algorithms in risk evaluation could potentially harm policyholders by infringing on their privacy and leading to discrimination, thereby impinging on their rights
TRANSLATION AS A PEDAGOGY IN THE DEVELOPMENT OF ENGLISH SECOND LANGUAGE IN A RURAL UNIVERSITY
Get PDFEnglish proficiency among black South African learners and students has been found to be generally difficult to attain despite English being used as the sole medium of instruction in schools and at universities. To mitigate the issue, this paper explores the use of translation pedagogy as an approach in enabling bilingual students to utilise their linguistic repertoire as a tool not only to enhance their English Second Language development but to also give recognition to their first language. The contribution of the study is made significant by the fact that available related research has largely been conducted at kindergarten and school level leaving a gap in the higher education environment. An observational qualitative data collection methodology was conducted in which a university lecturer presented a lesson prepared by the researcher. The participants were bilingual in a predominantly African language speaking university community in a rural area of South Africa. The use of students’ African language (IsiZulu) was observed to enhance their English vocabulary which in the process saw them participating freely in both languages throughout the lesson. The main finding of the study is that English competency can be enhanced with the learners’ home language in a carefully prepared lesson that draws from translation pedagogy
A CRITICAL ANALYSIS OF HEMP (CANNABIS SATIVA L.) USE: SCIENTIFIC, LEGISLATIVE AND SOCIO-ECONOMIC ASPECTS
Get PDFCannabis sativa L. culture has encountered various legislative challenges throughout history, and these have varied according to the social, political and economic context of each period. Historical stigma and prohibitions brought restrictions on cannabis, and anti-drug and prohibition policies adopted in the 20th century led to the prohibition of the cultivation of Cannabis sativa L. Its incorrect association with drugs of abuse and its classification as a narcotic substance complicated the legislation. Problems in differentiating between recreational and medical use have created confusion in law. Global inconsistency in cannabis rules and regulations has created difficulties in international trade and research cooperation. The recent evolution of legislation, marked by ambiguities and inconsistencies regarding the medical, industrial, and food use of cannabis, has raised questions and challenges. Production and marketing issues, such as strict regulations and licensing hurdles affect the cannabis industry in the Republic of Moldova too. These challenges are constantly changing, reflecting the diversity of perspectives and societal developments