bluuebunny/crossref_metadata_2025 huggingface dataset:
Software educativo TREM: evaluación y selección de tuberías de revestimiento y su estado mecánico
Authors: Jiménez Moreno Marcos Andrés , Hernández Barajas José Roberto , Jiménez Hernández José del Carmen
Published: April 2022

El objetivo del presente trabajo fue elaborar un software para la evaluación de diseño de tuberías de revestimiento y su estado mecánico confiable, sencillo y de fácil adaptación entre el programa y el usuario. Para ello, se combinó la teoría técnica y científica con la experiencia en el manejo de software especializado en el diseño de pozos petroleros. La estrategia para su desarrollo consistió en la descomposición del problema original en tres secciones: 1) identificación y manejo de las diferentes propiedades mecánicas de las tuberías de revestimiento, 2) identificación y evaluación de los diferentes tipos de esfuerzos que se presentan en las tuberías de revestimiento según el diseño del pozo y 3) esquematización del arreglo de tuberías acorde a la profundidad y diseño del pozo. Entre los resultados se logró combinar la programación con el material especializado técnico y científico: seleccionar, evaluar y esquematizar las diversas tuberías de revestimiento según los datos operativos del diseño del pozo, así como determinar un costo aproximado de las tuberías y de las operaciones en su selección y asentamiento para, finalmente, seleccionar el porcentaje y costo total de la perforación. En conclusión, el trabajo desarrollado resuelve la problemática presentada, pero solo aplica a pozos verticales, dada la limitación de gráficos 3D para la perforación direccional y con una profundidad máxima de 5200 m (17 060 ft).
Multilevel human capital assessment system
Authors: Dorokhov M. V.
Published: April 2022

Human capital in any organization is one of the key assets. But not many managers are able to assess human capital in financial terms, as well as determine the financial value of this asset. Most of the organization’s human capital is made up of labor. The amount of this capital is also influenced by the management of human capital itself and culture.
“It Was All that I Could Think of.” Migration, Youth, and Folkloric Entertainment in Rural Romania
Authors:   Museum of History and Art, Zalău, Romania. Email: valer.simion.cosma@gmail.com., Cosma Valer Simion
Published: April 2022

"A hybrid that originated in the traditional peasant music, Romanian popular music (muzică populară), as it is known from radio broadcasts, TV shows or live performances from all around the country, was developed by mixing the village music of the twentieth century with techniques and principles borrowed from the classical repertoire and other light genres. Muzica populară emerged in the interwar years, but was perfected and regulated by the communist regime, becoming one of the favorite genres of the rural and urban working class and, nowadays, it continues to have a great appeal among all age categories. Our aim was to discover the motivations that lead the village youth of Romania to involve themselves in activities dealing with muzica populară, in particular, or with folklore and traditions, in general. To accomplish this, we conducted several interviews with young people from Sălaj county, from which a few patterns emerged: the rapid familiarization with the genre due to specific TV channels; the acquired taste due to grandparents raising their grandchildren in the absence of the parents who migrated in the 2000s; the expressed devotion to the local culture and their willingness and duty to preserve and promote it. We can also explain the success of muzică populară among young people by structural factors that are at work in the whole society, namely the lack of interest of post-communist authorities in building and/or maintaining a cultural and educational infrastructure in the rural areas. Thus, this paper aims to explore contemporary rural pop culture by considering the connection between the deterioration of the cultural infrastructure in rural areas, transnational migration and the exponential development of an industry devoted to the recent muzică populară. Keywords: muzică populară, folklore music, folk traditions, rural youth, cultural infrastructure, transnational migration, niche TV channels. "
Tourism Management Issues and its Relationship with the Sustainable Development Goals
Authors: Pertiwi Vidya Imanuari , Harmawan Bagus Nuari
Published: April 2022

The development of tourism looks brilliant because of the achievement of its economic contribution. However, current tourism management, especially in Indonesia, tends to neglect the ecological aspects of the environment and the social community. This injures Indonesia's commitment to sustainable development. This study aims to review the development of tourism in Indonesia and the impact caused by tourism development, especially tourism development in Yogyakarta. The methodology used in this study is qualitative by using secondary data such as journal articles, news, books, and government report. The study results found that tourism development in Indonesia, especially in Yogyakarta Province, only focuses on the economic sector. The tourism sector management actors focus more on making as much profit as possible without paying attention to sustainable tourism development. This results in environmental problems such as the scarcity of clean water for the community. Tourism management that does not pay attention to sustainable tourism practices also causes community conflicts against tourism actors
Doctor honoris causa of the Belarusian State Agricultural University. An essay on the fertilization
Authors: Łabuda Stanisław Z.
Published: April 2022

The paper presents the author’s views to all whom they may concern. An inspiration of the considerations was provided by the splendid works shown in the bibliography.
Zawartość metali ciężkich jako kryterium oceny jakości bulw ziemniaka
Authors: Bednarek Wiesław , Tkaczyk Przemysław , Dresler Sławomir
Published: April 2022

The environmental study was aimed at assessment of potato tuber quality based on the content of heavy metals (lead, cadmium, nickel, zinc, copper, arsenic, mercury) and finding a correlation between these heavy metals and some properties of soil and plant. Metals in soil and tubers were determined with ASA method, other soil properties were  also determined: granulometric composition with Prószy ski aerometric method, pH in 1 mol KCl dm-3, humus with Tiurin method, P and K available according to Egner-Riehm, Mg available according to Schachtschabel, S with nephelemetric method. The results of the analyses were statistically assessed with analysis of variance, simple dassification with the use of Tuckey,s confidence halfinterval, correlation coefficient, multiple correlation coefficient, coefficient of determination and regression equation were computed. The content of these trace elements in potato tubers was not significantly dependent on the region of cultivation. Properties of the soil and the plant did not decide, in most cases, about the contents. The mean content of heavy metals in potato tubers (0.042 mg Pb, 0.042 mg Cd, 0.176 mg Ni, 3.378 mg Zn, 0.793 mg Cu, 0.002 mg As, 0.00012 mg Hg kg-1 of fresh matter) indicates that it did not exceed the upper threshold typical of products of this type.
Plonowanie gryki w plonie głównym i wtórym
Authors: Wesołowski Marian , Juszczak Dariusz
Published: April 2022

The field experiment was carried out on the podsolic soil made from slightly loamy sand (weak rye complex) in the years 2003–2004. There were two factors in the experimental scheme: I. kind of crop (main and second), II. Seeding rate (60, 80 i 100 kg . ha -1). In the main crop buckwheat was cultivated in the site after a mixture of grain crops (oat  + spring barley + spring wheat), whereas in the second crop in the site winter inter crop as winter rye. Buckwheat Hruszowska was cultivated at two sowing dates: 20 May in the main crop and 30 May in the second crop. The yield of nutlets and straw, the number of plants per 1m2 after emergences and before harvest, the number and weight of normally developed nutlets and unfilled on the plant as well as a thousand nutlets weight of buckwheat were investigated. It was proven that the yield of nutlets of buckwheat depended exclusively on the cultivation place and reached 0.99 t  ha-1 in the main crop and it was higher by 70% than in the second crop. The most favourable effect on the value of the rest of the resulting feature with an exception to the thousand nutlets weight has the sowing of 60 kg and next the cultivation of buckwheat in the main crop. A thousand nutlets weight was formed mainly under the influence of the years of study.
Zróżnicowanie geomorfologiczne terenów zalewanych doliny Warty a występowanie zbiorowisk łąkowo-szuwarowych
Authors: Kryszak Anna , Kryszak Jan , Grynia Maria
Published: April 2022

The aim of the performed investigations was to determine the relationship between the occurrence of meadow-rush communities, their floristic diversity and degree of synanthropisation and the developed geomorphological forms of the flooded areas of the Warta River valley. In the identified meadow-rush communities classified on the basis of the analysis of about 1500 phytosociological surveys taken with the use of the Braun-Blanquet method, the author assessed the floristic abundance of the identified communities on the basis of the general and mean number of species in a phytosociological survey as well as their floristic diversity and degree of synanthropisation in relation to the distribution of these communities on the area topography. From among the identified geomorphological forms, the largest area in the examined fragment of the valley was taken up by the floodplain, whereas the most common communities found on the flooded terrace were those of the Phragmitetea class. The meadow-rush communities varied with regard to their wealth and diversity depending on the place occupied on the flooded areas of the Warta River valley. Communities occurring on the flooded plain exhibited both the highest number of species (from 23 to 87) and the highest index of floristic diversity (H’ from 1.5 to 3.8). The highest resistance to the anthropo-pressure was observed among the communities of the wettest sites belonging to the Phragmitetea class.
Przyrodnicze i krajobrazowe walory przydrożnych zbiorowisk roślinnych Lubelszczyzny
Authors: Harkot Wanda , Wyłupek Teresa , Czarnecki Zbigniew
Published: April 2022

The aim of the study was to catalogue the plants at sides of the Lublin region roads (local, regional and national) and to evaluate their natural and landscape advantages. Within the areas of 50–100 m2 characterised by a similar species composition and of similar seat conditions the flora lists were prepared and the percent of the given species was determined. In total, 215 species were distinguished, including 36 grass species, 27 papilionaceous ones, 1 fern, 1 horsetail as well as 160 taxons from other botanical families. Bio-indicative evaluation of habitat conditions at the studied roadsides was carried out on the basis of ecological index for the distinguished taxons (L, T, K, W, Tr, R, D and H). It was found that colourful plant communities at roadsides of the Lublin region are a necessary esthetic element for a landscape through seasons.
Rzadsze rośliny naczyniowe terenów kolejowych w określonych regionach Kotliny Sandomierskiej. Cz I. Nizina Nadwiślańska, część północna
Authors: Święs Florian , Majkut Andrzej
Published: April 2022

The present study is one of  the first  that are devoted to previously unknown stations of the more interesting flora of vascular plants discovered  in the railway areas in specific regions of the Sandomierz Basin. Stations of 112 plant species of this type were currently described, which are located in the railway areas in the Sandomierz Basin in the northern part of the Vistula Lowland. Among the plants investigated, apophytes (69 species) prevail over anthropophytes (33 species).  Moreover, there are presented stations of nine taxa of different rank of genus Oenothera plants with an unknown history of their settlement in the territory of Poland. They are generally plants with stations recorded with varying frequency on a regional and national scale. The most interesting and rarest of these in the Sandomierz Basin  include above all: Althea hirsuta, Bromus japonicus, B. rigidus, Chondrilla juncea, Cirsium canum, Fumaria muralis, Euphorbia lucida, Erysimum marschallianum, Galium rubioides, Gladiolus paluster, Gratiola officinalis, Linaria genistifolia, Oenothera coronifera, Oe. fallax, Oe. hoelscheri, Oe. parviflora, Ononis spinosa, Potentilla intermedia, Roripa x armoracioides, Sedum reflexum, Silene latifolia, S. otites.
Zioła w zbiorowiskach śródleśnych łąk w aspekcie użytkowym i krajobrazowym
Authors: Trzaskoś Maria , Szydłowska Joanna , Stelmaszyk Anna
Published: April 2022

The present study aimed at the assessment of the presence of herbs, both of medicinal and fodder value, in forest meadows. The evaluation was performed in northern and noth-western parts of Poland (Bory Tucholskie and Rokita at Przybiernów, and wierczyna at Szczecinek). The meadows were situated in various moisture conditions and on various soils, which decided abount their floristic composition and natural value. Of high natural value were plant communities from moist and very moist habitats. The most interesting were the meadows situated in Bory Tucholskie. Floristic analysis showed many species of herbs that were present in the sward of meadows which improved the fodder value of the sward such as Achillea millefolium, Taraxacum officinale, Plantago lanceolata,  Daucus carota,  and also herbs of medicinal value, e.g.  Hypericum perforatum, Filipendula ulmaria, Lamnium album, Linaria vulgaris, Helichrysum arenarium as well as dietetic herbs such as  Rumex acetosa, Mentha arvensis  and others. The most differentiated were plant communities in Bory Tucholskie, whereas the least variation within the herbs was found in the wierczyna site. The described meadows also represent a high landscape value.
Zróżnicowanie fitosocjologiczne zbiorowisk roślinnych w zmeliorowanych dolinach rzecznych Lubelszczyzny
Authors: Mosek Barbara , Miazga Stanisław
Published: April 2022

The aim of the study was to identify the plant communities occurring in meliorated river valleys of the Lublin region. The studies included 10 river valleys. In total, 750 floristic photographs qualified into 39 plant communities were taken by means of Braun–Blanquet’s method. The occurrence of 10 communities from Molinio-Arrhenatheretea and 6 from Phragmitetea class was found in most valleys. They formed 90.28% of taken phytosociological photographs. The following communities from Molinio-Arrhenatheretea class were most frequent: Arrhenatheretum elatioris, Poa pratensis-Festuca rubra, Alopecuretum pratensis and Caricetum gracilis from Phragmitetea. In total, 42 grass species were found in all studied communities. Among 39 plant communities, 39 grass species were noted in 6 them, which means 92.85% of all occurring grasses. The landscape traits of meliorated river valleys were not so good as those with original plants.
Analiza struktur organizacji i działalności niektórych stowarzyszeń agroturystycznych w Polsce
Authors: Wielgosz Elżbieta , Szember Adam
Published: April 2022

The objective of the investigation was to observe the effect of selected plants on the number and activity of soil microorganisms. Soil samples for analyses were collected from the rhizosphere, and control samples were taken from fallow soil. The total number of bacteria and the total number of fungi as well as the number of ammonification bacteria and the number of lipolytic bacteria were determined by using dilution plate technique. The number of cellulolytic bacteria and the number of nitrifying bacteria were determined on the basis of the titre. The most probable number of bacteria was taken from Mc Crady tables. The respiratory activity was measured on the basis of the quantity of emitted CO2 according to Rühling et al. The highest respiratory activity was stated under Sida heramphrodita and Helianthus tuberosus. In general, more CO2 was emitted in autumn, which is the period of increased mineralization of organic matter in soil. Both vetch and chickling vetch, despite their acid reaction, were found to stimulate the development of ammonification, nitrifying, cellulolytic, and lipolytic bacteria. The highest total number of bacteria and the relatively high number of fungi were stated in the soil under these plants. The smallest number of fungi was stated in the fallow soil. Thus, the relation of bacteria to fungi was the highest there. Kaszubska vetch and chickling vetch proved to the most positive effect on the soil microbial communities studied. They may therefore be used to improve the biological activity of degraded soils.
Lift Force Measurement in Landing Gears Dynamic Tests
Authors: Skorupka Zbigniew
Published: April 2022

As one of the key components of the aircraft in terms of both operation and safety landing gears are of special interest of the aviation regulations. During the touch down landing gears need to dissipate as much of the energy as possible maintaining the lowest volume and weight as required by the aviation design restrictions. According to the aviation regulations landing gears have to be tested in order to prove the dissipation of the calculated landing energy and to evaluate actual loads acting on the fuselage via the mounting nodes of the landing gears. The tests need to replicate the real landing conditions as closely as possible – including the lift force (or lift) acting on the aircraft during landing. The lift force during landing is not sufficient to maintain the aircraft in flight but acts as the relief force to the aircraft weight resulting in lowering loads applied to the fuselage and decreasing landing energy needed to be dissipated. The lift force or lift has to be taken into account during laboratory tests of landing gears. The lift force needs to be simulated in all of the landing gears dynamic tests: performance optimization, proof of the operation for the certification, and the fatigue evaluation. There are two main methods of applying the lift during the tests: equivalent/effective mass or direct lift application. The latter is used at the Landing Gear Laboratory of the Lukasiewicz Research Network – Institute of Aviation (where author works on daily basis). The lift is applied by the pneumatic cylinders built in the test stand. Until recently the control of the lift force value was performed indirectly by the measurement of the pressure inside the pneumatic system. Recently the experimental direct measurement system using force transducers was introduced in order to directly measure the lift force during every test. In the presented paper, the author gives an overview of the lift force measurement system including its design and the results of the preliminary use evaluation.
On-Court Change of Direction Test: An Effective Approach to Assess COD Performance in Badminton Players
Authors: Fernandez-Fernandez Jaime , Loturco Irineu , Hernández-Davó Jose , Nakamura Fabio , García-Tormo Vicente , Álvarez-Dacal Francisco , Martinez-Maseda Jonathan , García-López Juan
Published: April 2022

The aim of this research was to assess the reliability of a specific change of direction test (i.e., “On-Court COD test”) in youth badminton players, evaluate the effect of age on On-Court COD performance, and examine its correlations with linear speed, change of direction speed, and vertical jump tests. Forty-two young badminton players (27 males and 15 females; age: 17.3±1.6 years, body height: 170.3±7.5 cm, body mass: 59.0±9.7 kg) were divided into two age groups (Under 17 years and under 19 years). Tests included: linear sprints (5, 10, and 20-m), bilateral/unilateral countermovement jumps, a hexagon test, traditional and modified 505 change of direction tests; and On-court COD. Results showed an excellent intraclass correlation coefficient score (0.90) and a very low coefficient of variation values (1.6%) for the On-Court COD test. Comparing age groups, under 19 players were significantly faster in linear sprints (i.e., 5, 15 and 20-m; small to moderate effect sizes) and in all change of direction tests (moderate to large effect sizes). Moreover, the On-Court COD test showed moderate to large (r=.513-.779) relationships with both acceleration and COD abilities in under 17 players, and with linear sprints, COD, and jump performances in under 19 players. These data indicate that the On-Court COD test is a useful and reliable means to assess COD performance in youth badminton players and it is associated with acceleration, sprint and jump performance.
Training with a Heavy Puck Elicits a Higher Increase of Shooting Speed Than Unloaded Training in Midget Ice Hockey Players
Authors: Novak Dominik , Loskot Jiri , Roczniok Robert , Opath Lukas , Stastny Petr
Published: April 2022

A method of load variability is a common way of developing specific skills in various sports, however, not explored considering the use of different ice-hockey pucks. Therefore, the purpose of this study was to compare shooting speed, shooting accuracy, and handgrip strength changes after training with variable training loads (lighter 60g pucks and heavier 260g pucks) in the wrist shot and snapshot. Sixteen male ice hockey players (13.62±0.35y; 167.67±7.71cm; 53.87±7.55kg) were subjected to a 12 week experiment during which they trained six weeks with a light puck and six weeks with a heavy puck and were tested for shooting speed, shooting accuracy and handgrip strength. The variable load training increased shooting speed (the long hand snapshot by 7.4%, the shorthand snapshot by 8.5%, and the wrist shot by 13%), shooting accuracy (by 14%), and handgrip strength (by 8.7%) of the bottom hand; all at p<0.001. Training with heavy pucks was more effective (d=0.50-0.86) than training with lighter pucks (d=23-25) for increasing puck speed. Shooting accuracy was increased by variable load training with a similar effect of heavy and light puck training. The variable training load had a positive effect on shooting speed and accuracy and the use of a heavier load was more effective than using the unloaded puck. Variable load shooting training in youth ice-hockey players is more effective with heavier pucks than lighter ones, and the improvements are greater in players with better shooting skills.
Assessing the Sprint Force-Velocity Profile in International Football Players with Cerebral Palsy: Validity, Reliability and Sport Class’ Profiles
Authors: Peña-González Iván , Javaloyes Alejandro , Manuel Sarabia José , Moya-Ramón Manuel
Published: April 2022

This study assessed and described the Sprint Force-velocity (SFv) profile, and its validity and reliability in international cerebral palsy (CP) football players. Twenty international male CP football players (age: 26.9±7.4) performed a 30-m sprint, a vertical jump (CMJ), a change of direction (MAT), a dribbling and an intermittent endurance (Yo-YoIR1) test. The SFv profile and physical performance variables were shown according to the players’ sport class with the estimation of the effect sizes between classes. The SFv showed high reliability (ICC=0.77 to 0.99; SEM=0.89 to 8.66%). Validity for the SFv was provided by its positive correlation with the players’ sport class (r=0.53 to 0.75; p=.02 to <.01) and the rest of the physical performance tests (r=0.45 to 0.99; p=.04 to <.01). The RFmax was the main SFv profile variable that explained players’ performance in the rest of the tests (β=0.77 to 1.0; p<.05; R2=0.59 to 0.99). The SFv profile seems to be an efficient test to assess international CP football players’ physical performance. This provides information about the players’ individual sprint mechanical characteristics and their sprint strengths and weaknesses, allowing coaches and conditioning trainers to individualize their training interventions to optimize sprint performance.
Handcycling Training in Men with Spinal Cord Injury Increases Tolerance to High Intensity Exercise
Authors: Hall Barbara , Sikora Marcin , Jonas Dominik , Matthews Eleanor , Żebrowska Aleksandra
Published: April 2022

Individuals with spinal cord injury are characterised by reduced physical capacity as compared to able-bodied persons, and are at risk of developing cardiovascular disease. The study aimed to evaluate the differences in physiological responses to an exercise test in handcycling-trained vs. able-bodied-trained and non-trained men. Eight males with spinal cord injury who were trained in handcycling, eighteen able-bodied males who were trained in powerlifting, and fourteen physically active non-athletes performed a graded arm crank ergometer test. The following physiological indices were measured before and during the test: heart rate, oxygen uptake, and blood lactate concentrations. Aerobic capacity was significantly higher in athletes with spinal cord injury compared to able-bodied athletes (p<0.01) and the control group (p<0.01). The heart rate achieved by handcycling-trained athletes was significantly lower as compared to powerlifters (p<0.01), however, the oxygen pulse was significantly higher (p<0.05). Handcycling-trained athletes reached significantly higher peak power (Pmax) during the graded arm exercise in comparison with powerlifters, and significantly higher post exercise blood lactate concentration (p<0.05). The lactate threshold was observed at a significantly higher P in individuals with spinal cord injury compared to able-bodied-trained (p<0.05) and non-trained men (p<0.001). Athletes with spinal cord injury were found to have excellent aerobic capacity and better physiological adaptation to the maximal graded exercise test as compared to able-bodied-trained men. These findings emphasize the importance of regular physical exercise and its potential therapeutic role in the prevention of cardiovascular disease in patients with spinal cord injury.
Hand Grip Strength vs. Locomotor Efficiency in Sitting Volleyball Players
Authors: Wiliński Wojciech , Struzik Artur , Rokita Andrzej , Krejci Milada , Wieczorek Marta
Published: April 2022

The objective of this paper was to determine the relationship between hand grip strength and movement time (locomotor efficiency in a seated position using the upper and lower extremities) in sitting volleyball players. In addition, a comparison was made between the velocity curves for forward and backward locomotion. Nine male members of the sitting volleyball team participated in the study. Hydraulic and spring manual dynamometers were used to measure hand grip strength. Movement times were registered for distances of 1, 2, 3, 4, 5, 6 and 10-m with the use of the Smart Speed System photocells. Significant relationships between hand grip strength of the left (rs=-0.78) and right (rs=-0.73) hands and the forward movement time over a distance of 1-m were found. Hand grip strength had no significant relationship with either forward movement times at other distances or backward movement times. Results suggest that hand strength is linked to locomotor efficiency of sitting volleyball players. High hand grip strength makes the start easier by pushing away from the ground with the upper limbs.
Evaluation of Critical Solar PV Meteorological and Performance Parameters of a Roof-Mounted Crystalline Solar PV System in Berea, Durban, South Africa
Authors: Ebhota Williams , Tabakov Pavel Y.
Published: April 2022

The technical challenges that make solar photovoltaic (PV) less suitable for some applications include weather conditions, low energy densities, and low conversion efficiency. However, the effects of these shortcomings can be limited through a 3-stage solar PV system assessment and performance evaluation process in this study. The system installation is on geographical coordinate -29.85°, 031.00° at Musgrave, Berea, Durban, South Africa. Four solar PV assessment, design, and simulation software applications (PV*SOL, SOLARGIS Prospect and pvPlanner, and PVsyst) were deployed. Based on the simulation reports obtained from the four software applications used, the following estimates of solar potential assessment parameters were obtained - global tilted irradiation GTI, (1890 kWh/m2); global horizontal irradiation, GHI (1684 kWh/m2); diffuse horizontal irradiation DIF, (694 kWh/m2); ambient temperature (19 °C). In addition, the following performance parameters were reported - produced energy (13.06 MWh/year); specific production (1511 kWh/kWp/year); performance ratio, PR (79 %); and solar fraction, SF (36.92 %).
Experimental and Numerical Investigation of a Cracked Cantilever Beam for Damping Factor to Access its Applicability in the Crack Detection
Authors: Khalkar Vikas , Kumbhar S. G. , Logesh K. , Hariharasakhtisudhan P. , Jadhav S. D. , Danawade B. A. , Gharat S. H. , Jugulkar L. M. , Borade J. G.
Published: April 2022

The cracks alter the physical and modal properties of the beam, i.e., stiffness, damping, natural frequency, and mode shapes, and, in turn, the dynamic response of the beam changes to a considerable extent. The condition monitoring of the beams is essential to avoid its catastrophic failure in applications. A basic criterion has been followed for modal parameters like natural frequencies, mode shapes, and stiffness for the possible crack detection. In contrast, damping as a dynamic property to represent structural damage has been limited due to the difficulties in measuring damping and analysis. Therefore, in this study, the effect of various possible crack profiles, i.e., V-shaped and U-shaped, on the applicability of using the damping criterion for determining the presence of damage in the cantilever structure was investigated. The damping loss factor for all the cracked cases of a cantilever beam was computed using ANSYS and experimental analysis. The numerical results of the damping loss factor were compared with experimental results. It was understood that the results were susceptible to the crack geometries changes.
Optimal Control of Quantum Systems by Pontryagin Maximum Principle
Authors: Binandeh Dehaghani Nahid , Lobo Pereira Fernando
Published: April 2022

Optimal control provides powerful tools and concepts that can be applied to control quantum systems. It has been used extensively to improve the performance of quantum processes in a variety of active areas in quantum technologies. This paper reviews the necessary conditions of optimality in the form of a Pontryagin Maximum Principle (PMP), and introduces its formulations for quantum systems. After formulating an optimal control problem for a two-level quantum system, we then study the application of PMP to obtain an optimal control strategy.
Effects of nozzle material and its lifespan on the quality of PLA parts manufactured by FFF 3D Printing
Authors: Tribuzi Melo Joana , Santana Leonardo , Idogava Henrique  Takashi , Lopes Pais Ana Isabel , Alves Jorge Lino
Published: April 2022

The calibrated nozzle is one of the main components of a Fused Filament Fabrication (FFF) 3D printer. However, few studies explore its lifespan, and the effects of the thermal conductivity of the material on which it is built in the 3D Printing process. These aspects were evaluated in this study through the analysis of mechanical properties (flexural test), porosity and density of Poly (lactic acid) (PLA) parts. Samples were manufactured with brass, hardened steel, and Vanadium™ nozzles, varying the building orientation and the raster angle parameters. A brass nozzle with a long printing history was used. The main finding showed that the lifespan of the brass nozzle was a significant factor in reducing the quality of printed parts compared to those obtained with low heat conduction nozzles (hardened steel and Vanadium™).
Evaluation of cellular structures with triply periodic minimal surfaces fabricated by additive manufacturing
Authors: Oliveira André , Reis Luís , Leite Marco , Alves Frederico , Moita de Deus Augusto , Sardinha Manuel , Vaz M. Fatima
Published: April 2022

Cellular structures are formed by struts and edges, which makes them difficult to fabricate by conventional technologies. The emergence of 3D printing has enabled the production of such complex structures. In the present work, the Fused Filament Fabrication method was used to obtain cellular structures formed by the repetition of triply periodic minimal surfaces unit cells. Due to the complexity of the cells, several defects occurred until the procedure was fine-tuned. Failure analysis of samples was performed after bending and compression tests. Failure occurs at the same locations of the samples independently of their relative density, for the three densities tested. These fracture initiation locations correspond to the zones where the von Mises stress is highest.
Evaluating the information-analytical system’s efficiency for internal control purposes of insurance organizations
Authors: TURGAEVA Aksana A.
Published: April 2022

Subject. The article addresses the information and analytical system for internal control purposes of an insurance company.
Objectives. The aim is to evaluate the effectiveness of software products for internal control of insurance companies, to develop parameters of indicators for information and analytical system’s evaluation.
Methods. We employ general scientific research methods. The study was conducted on the basis of insurance companies using a particular software product.
Results. We reviewed the specifics of software products in the context of parameters that characterize the functional completeness to support the processes of internal control of an insurance company. We developed parameters of indicators to evaluate the information-analytical system, formulated strategic goals and objectives of the system under consideration.
Conclusions. The advantage of the proposed system of indicators and evaluation parameters is to assess the functional completeness of the information-analytical system in relation to the objectives of internal control of the insurance company.
The eventual econometric model of the monetary policy of the Russian Federation
Authors: GUDAKOVA Lyudmila V. , GREBENNIKOVA Elena D. , FOSHCHAN Galina I.
Published: April 2022

https://www.fin-izdat.com/journal/fc/detail.php?ID=78306
Relative deformation of matter at the micro- and macrolevel under the conditions of changing space weather
Authors: Zubkov А. V. , Sentyabov S. V. , Selin K. V.
Published: April 2022

Research subject. Deformations and stress state of rock masses at subsoil use objects.

Materials and research methods. Extensive experimental data about the relative deformation of matter and, in particular, about the deformation of rock masses (earth’s crust) allowed the authors to find a solution to this problem using the very behavior of the rock mass during its response to technogenic activity.

Results. Novel results were obtained on the relative deformation of matter under the conditions of changing external factors: 1) deformation of rock mass itself; 2) deformation of a surveying tape as a measuring instrument, 3) deformation of a quartz tube in a deformometer as a measuring instrument. Using the results of measurements over the 11-year nanocycle of solar activity available to us, regularities in the emergence of deformations and stresses of rock masses were revealed. A justification was obtained for changing the physical state of measuring instruments based on electromagnetic waves: satellite navigation systems, light and radio range finders. At the same time, it was found that all these parameters change in time continuously and endlessly, thereby requiring constant monitoring for making a reliable forecast of their impact on technogenic activity.

Conclusion. The results presented in the article extend previous publications of the authors, the main conclusions of which are as follows. 1. The results about the deformations of rock masses, which are currently being obtained by methods based on various physical principles, are relative; therefore, these results do not allow one to judge about their absolute values. 2. The international community of scientists should develop a mechanism for tracking changes in the deformations and stress state of rock masses.
Problems of application of digital technologies in the territories of Azerbaijan liberated from the Armenian occupation
Authors:   Azerbaijan National Academy of Sciences, Institute of Information Technology, Aliyev Alovsat
Published: April 2022

The article substantiates the importance of the application of digital technologies in the economic processes of Karabakh. It identifies the development trends of establishing a new economy in the territories liberated from 30 years of Armenian occupation. The problems of the application of the 4.0 Industrial Revolution in the development of the digital economy in Karabakh are studied. The ways of greening the ecological environment and increasing economic inclusion in the region are identified. The features of forming innovative infrastructures, digital technologies and data economy are analyzed. Digital transformation is shown to be one of the country’s top priorities. The problems of digital transformation in the development of Karabakh are studied and their solution tendencies are identified, the importance of the development of promising digital projects is indicated. A conceptual model of the architectural and technological structure of the E-Karabakh complex plan is proposed for the revival of Karabakh. The features of transition from the traditional Karabakh regional economy to the new Karabakh smart digital economy are studied. “Green” development issues, clean ecological environment and green development tendencies in Karabakh are identified. Improvement of ICT-based infrastructure, the application of high digital technologies in Karabakh can reveal additional potential opportunities to increase the efficiency of the digital economy in the new economic management and to develop the Karabakh economic region.
Trends in the digitalization of the banking sector: an international aspect
Authors:   Southwest State University, Kursk, Russian Federation, Kirillova Elena , Zulfugarzade Teymur ,   Plekhanov Russian University of Economics
Published: April 2022

The study analyzes the main features of the use of digital technologies in the financial and banking sector at the international level. In the paper, we can conclude: the customer's digital identifier is the main attribute when using technology platforms in the banking sector; the norms on personal data protection and information security requirements should apply to the customer's digital identifier; since the digital identifier is analogous to a passport, we can say that the digital identifier can contain more information about an individual and allows to participate in digital civil turnover. The study proposes a method for assessing the degree of digitization of banks by the level of automation of key processes; by the number of online services provided; by the speed of transactions; by the availability of online services around the clock; by the range of digital technologies used; by the volume of online sales and the volume of transactions carried out using digital technologies.
Assessment of the impact of economic agent vulnerability on economic - financial performance indicators
Authors:   Romanian Academy, Center for Financial and Monetary Research, Manta Otilia ,   Romanian-American University, Yue Xiao-Guang ,   European University Cyprus,   CIICESI, Escola Superior de Tecnologia e Gestão, Politécnico do Porto, Militaru Iuliana ,   Romanian-American University, Hamori Shigeyuki ,   Graduate School of Economics, Kobe University, Japan, Teresiene Deimante ,   Faculty of Economics and Business Administration, Vilnius University
Published: April 2022

Crises, whether related to health, finance or the economy, directly affect the lives of each individual and their families. As the inequality gap between rich and poor grew after 2010, many economists predicted a new crisis. But the hypothesis that an economic crisis would stem from a coronavirus outbreak was limited to younger, visionary economists. The current situation is directly related to the impact that this crisis is having on the global economy and, more precisely, the impact of the vulnerability of the economic agent at the local level in terms of economic-financial performance indicators. In this paper, using mathematical modeling we present scientific solutions in regard to the current economic crisis caused by the COVID-19 pandemic. We further consider that at the moment of the crisis, the collaborative economy takes the place of the globalized economy.
Motivos para a evasão das meninas em Projetos de Inclusão Social por meio do esporte
Authors: Vianna Jose Antonio , Arruda Ulhiana Maria de Medeiros , Araújo Paulo Coelho
Published: April 2022

Este estudo exploratório procurou verificar os motivos de ex-alunas em Projetos de Inclusão Social esportivos (PIS) para evasão das atividades. Responderam ao questionário semiestruturado 23 professores (M idade = 37,7 anos) e foram entrevistadas dez ex-alunas (M idade = 17,1 anos) em dois PIS situados no interior de favelas no Rio de Janeiro. As informações extraídas respeitaram os critérios de análise de narrativa, sendo triangulados com o referencial teórico da área. Foram identificados motivos para evasão de ordem social, pedagógico, psicológico e de gestão. A necessidade de trabalhar e estudar foram os principais motivos apontados para evasão. Os procedimentos didáticos nas aulas também foram citados com destaque, além da descontinuidade das políticas públicas de esporte e lazer para as camadas populares.
A mimese da formação continuada
Authors: Gabriel Gilvete de Lima
Published: April 2022

Nesse artigo tenho como objetivo apresentar as influências dos grupos-referência na formação e atuação docente. Realizei a pesquisa-formação com professoras da educação básica no Norte do país. A discussão estará centrada na mimese da formação continuada, metodologia originada do trabalho fundamentado na abordagem (auto) biográfica, tendo como referencial teóricos: Pineau, Nóvoa, Josso, Passeggi dentre outros e na hermenêutica de Paul Ricoeur. A narrativa autobiográfica e o relato de experiências bem-sucedidas possibilitaram a configuração e refiguração da identidade docente, ao propiciar o reconhecimento da prática educativa em diferentes espaços e tempos, demonstrou que a re-narração de si oportuniza reafirmar/reconhecer os saberes da docência, a construção de sentido em cada atividade, a elaboração de conhecimentos, identificar os fatores intervenientes do próprio sistema escolar que limitam ou favorecem o alcance dos objetivos pedagógicos e, sobretudo, ressignificar os momentos vividos nos diferentes níveis de ensino da trajetória pessoal/profissional.
El pacífico colombiano y las comunidades negras en el contexto de la firma del acuerdo de paz : aportes al campo de los estudios afrocolombianos.
Authors: Olaya Requene Angela Yesenia
Published: April 2022

El campo de los estudios afrocolombianos comprende una rica producción de referencias, conceptualizaciones e investigaciones adelantadas desde diferentes disciplinas, orientaciones y metodologías acerca de la creación de territorios para explicar las dinámicas de construcción de identidades y lugares rurales, ribereños y urbanos de las comunidades negras en el Pacífico colombiano. Haciendo énfasis en las contribuciones de la antropología e historia, se ha profundizado en las dinámicas histórico-demográficas de poblamiento y movilidad de los afrodescendientes en el periodo colonial y republicano. En este campo, las prácticas de activación y apropiación de espacios pueden entenderse en diferentes momentos históricos, no disociados entre sí, por el contrario, hacen parte de procesos continuos de definición de identidades socioculturales y relaciones materiales y simbólicas que dan sentido a la vida cotidiana de estas comunidades. A saber: desde la constitución de la costa del Pacífico como una zona minera de frontera, impulsada por la esclavitud durante la Nueva Granada, cuya principal actividad económica residía en la minería del oro de aluvión laborada con fuerza de trabajo esclavizada criolla y africana (Almario, García 2014). Después de la independencia y a lo largo del siglo XX, la apropiación territorial, individual y colectiva que permitiría entender la emergencia del Pacífico como un colectivo diferenciado con una identidad territorializada en estrecha conexión con estrategias ecológicas, productivas y económicas propias de las comunidades negras.
Las humanidades del antropoceno desde la mirada de Donna Haraway y Rosi Braidotti.
Authors: Araiza Díaz Verónica
Published: April 2022

Este artículo es una reflexión sobre la mutación teórica de las humanidades en los últimos años en relación con lo que se ha dado en llamar Antropoceno y el consiguiente giro ambiental que se ha producido en estas disciplinas, lo que no se puede explicar sin considerar el papel determinante que ha tenido la tecnología en los modos de vida contemporáneos. Se abordan algunos de los debates principales a partir de dos teóricas feministas de gran impacto como son Donna Haraway y Rosi Braidotti, quienes forman parte de la escena crítica actual, dedicada a analizar las cuestiones políticas que subyacen a los fenómenos que presenciamos y de los que participamos, mismos que son vistos como articulaciones entre lo humano y lo no humano, lo biológico, lo técnico y lo social.
¿Medir el racismo o descifrar sus lógicas? aportación desde el contexto español.
Authors: Martín Godoy Paula , Olmos Alcaraz Antonia , Sebastiani Luca
Published: April 2022

En este artículo consideramos la producción de conocimiento sobre racismo en el contexto español y discutimos críticamente los abordajes teórico-metodológicos más influyentes en las políticas públicas. Nos centramos en dos estudios: el primero, una encuesta anual sobre la evolución de las actitudes ante la inmigración y el segundo, un barómetro destinado a la población musulmana. Argumentamos que la perspectiva «psicologicista-ideológica» desde la cual se aborda el racismo alienta la difusión de instrumentos de medición de corte positivista y termina por invisibilizar tanto sus dinámicas institucionales/estructurales/gubernamentales de reproducción como la experiencia diaria de quienes lo sufren en primera persona.
Results of a population-based study of the prevalence of cataract surgery and the causes of low postoperative visual function
Authors:   Ufa Eye Research Institute, Ufa, Russian Federation, Bikbov Muharram M. , Israfilova Gulnara Z. ,   Ufa Eye Research Institute, Ufa, Russian Federation
Published: April 2022

Purpose. Тo study the prevalence of cataract surgery, its effectiveness and factors that reduce visual results in a population of the population of the Republic of Bashkortostan. Material and methods. The Ural Eye and Medical Study population study, based on the Ufa Research Institute of Eye Diseases, was attended by 5885 people aged 40 years and older. A low visual result after cataract surgery was determined with visual acuity without correction below 0.3. Statistical data analysis was performed using the IBM SPSS Statistic application package. Results. The prevalence of cataract surgery was 6.1% (95% confidence interval (95% CI) 4.0–9.3%). A higher frequency of operations was associated with an age factor (odds ratio (OR) 1.13, 95% CI 1.11–1.15%; p<0.001), male gender (OR 1.67, 95% CI 1.19–2.37%; p=0.003), living in a city (OS 1.54, 95% CI 1.06–2.23%; p=0.02), single living (OR 1.46, 95% CI 1.01– 2.11%; p=0.04) and the presence of diabetes mellitus (OR 1.33, 95% CI 0.78–2.20%; p=0.02). Low visual results after cataract surgery, given the maximum postoperative correction, were detected in 11.5% of cases (58 eyes). The main reasons for the low postoperative result are refractive error (40%), macular degeneration (19.0%), glaucoma (15.5%), clouding of the posterior capsule (13.8%) and diabetic retinopathy (12.1%). Conclusion. The obtained results of good postoperative uncorrected visual acuity amounted to 73.1% and turned out to be quite close to international standards (80%). The main reasons for the low visual results of cataract surgery were refractive error and age-related macular degeneration. Key words: population study, cataract surgery, the prevalence of cataract surgery