bluuebunny/crossref_metadata_2025 huggingface dataset:
The effects of the EU’s forest-related policies on harvesting costs in Finland
Authors:   Natural Resources Institute Finland (Luke), Tekniikankatu 1, FI-33720 Tampere, Finland, Ahtikoski Anssi , Väätäinen Kari , Anttila Perttu , Laitila Juha , Mutanen Antti , Lindblad Jari , Sikanen Lauri , Routa Johanna
Published: April 2024

The EU’s influence on national forest policies is growing, and the implementation of forest-related policies proposed by the Commission will affect the practice of forestry in Europe. For instance, the Nature Restoration Law sets concrete areal goals for restoring forest ecosystems and for conservation, the Deforestation Regulation requires meticulous tracking of wood’s origin, and the renewed Renewable Energy Directive (RED III) sets new criteria to sustainable forest biomass procurement. So far there have been no studies that have looked into the impacts from the economic and operational point of view. In this study, structural systems analysis was first performed to discover the relevant variables (and their functioning) associated with the roundwood harvesting operations and the operating environment. A scenario approach was then applied to capture the potential levels of implementation of the EU’s forest-related policies. Finally, using different scenarios (low-, moderate- and high-impact) and a systems analysis framework, the impact of alternative levels of implementation was quantified in terms of harvesting costs, measured in € m–3. The results indicate that with the low- and moderate-impact scenarios the harvesting costs would increase by less than 10% from the current levels in three different regions in Finland. Such an increase (less than 10%) could be tolerated over a period of a few years, but a sudden increase is likely to lead to challenges to the running of businesses. With the high-impact scenario the harvesting costs would increase by between 15% and 18%, depending on the region. This magnitude of increase (of approximately a sixth) corresponds to a severe change in the roundwood harvesting operations and operating environment.
El iter procesal de la demanda laboral. Presentación, admisión y posibilidades de subsanación
Authors: Monjas Barrena Miriam
Published: April 2024

Presentación, admisión y posibilidades de subsanación es una obra que nace en el marco de dos relevantes Proyectos de investigación -“Ejes de la Justicia en tiempos de cambio”, IP Sonia Calaza (PID2020-113083GB-I00), Ayuda PID2020-113083GB-I00 ayuda financiado/a por MCIN/AEI/ 10.13039/501100011033 y “Transición Digital de la Justicia”, IP Sonia Calaza (RED 2021-130078B-100), Ayuda Referencia TED2021-130078B-I00 ayuda financiado/a por MCIN/AEI/ 10.13039/501100011033 y por la “Unión Europea NextGenerationEU/PRTR”. Esta importante y cuidada aportación teórica tendrá, sin duda alguna, un gran impacto en el ejercicio práctico. Con toda clarividencia y profundidad, se exponen las más relevantes tácticas, reglas y cautelas de la demanda laboral en un tiempo de grandes (y graves) controversias sociales que deben encontrar puntual (y económica) solución en tiempo real, pues lo contrario supondría sumergir a trabajadores y empresarios en una espiral de conflictividad, muy perniciosa -no solo- para nuestros lazos negociales más elementales (los que afectan a la privacidad de nuestro “día a día”); sino incluso, a mayor escala, para la economía, la productividad y la prosperidad de nuestro país.
Multitemporal Analysis of Seagrass Dynamics on Derawan Island (2003–2021) Using Remote Sensing Techniques
Authors: Fadhlurahman Yusuf Nauval , Manessa Masita Dwi Mandini , Semedi Jarot Mulyo , Efriana Anisya Feby , Haidar Muhammad
Published: April 2024

The shallow waters around Derawan Island are renowned for their beauty, attracting a significant number of tourists. Since the 2008 National Sports Week (PON) in East Kalimantan, the construction of inns and jetties has enhanced both accommodation and accessibility on the island. However, this development has also impacted the seagrass beds in the surrounding shallow waters. This study examines the changes in the area and density of seagrass beds from 2003 (prior to the PON activities) through to 2011 (a few years post-PON) and in 2021 (the most recent conditions), assessing the effects of lodging and jetty construction on these beds. Data were collected via field surveys using the photo transect method, and the benthic habitat map was created using Landsat 8 OLI Imagery, applying the Lyzenga water column correction algorithm and unsupervised classification method. The Normalized Difference Building Index (NDBI) algorithm and land digitization were utilized to track the development of the inns and jetties, revealing a rapid, widespread increase in construction throughout the island's southern region (R-square = 0.59). The study findings indicate a significant degradation of seagrass meadows between 2003 and 2021, particularly near populated areas on the southern coast, resulting in decreased density levels.
Vertical and Horizontal Variability of Chlorophyll-a and Its Relationship with Environmental Parameters in the Waters of Sangihe and Talaud Islands, North Sulawesi, Indonesia
Authors: Firdaus Mochamad Ramdhan , Rachman Arief , Fitriya Nurul , Wijayanti Lady Ayu Sri , Rozirwan Rozirwan , Purwandana Adi , Prayitno Hanif Budi , Alfiansyah Yustian Rovi , Sianturi Oksto Ridho , Sugeha Hagi Yulia
Published: April 2024

The chlorophyll-a is an important biological parameter that could act as a proxy to indicate the abundance of phytoplankton and the primary productivity of an aquatic ecosystem. This paper investigates the vertical and horizontal variability of chlorophyll-a in the waters of Sangihe and Talaud Islands, Indonesia, and its correlation with water environmental parameters. In this study, the distribution of chlorophyll-a, temperature, salinity, and nutrients (NO3 and PO4) from the surface to a depth of 200 m (photic zone) was measured at 29 research stations. The results showed that the distribution of chlorophyll-a in the waters of the Sangihe-Talaud Islands was varied vertically and horizontally. The waters around the Sangihe Islands generally exhibited a higher chlorophyll-a distribution and shallower Deep Chlorophyll Maxima compared to the water around the Talaud Islands. The concentration of chlorophyll-a varied between 0.0017 and 1.2155 mg.m-3, with most of the water column in Sangihe-Talaud considered oligotrophic, although some stations or depths were mesotrophic or slightly eutrophic. The maximum chlorophyll-a concentration was found in the sub-surface layer at depths between 46 and 101 m. The low N:P ratio (<16) and N:Si ratio (<1) indicate that the water columns of Sangihe-Talaud, up to a depth of 200m, were N-limited. Based on the GAM analysis, chlorophyll-a concentration in Sangihe-Talaud waters was primarily regulated by temperature, salinity, and the N:P ratio, with weak influence from phosphate and the N:Si ratio. The analysis also suggests that primary productivity in Sangihe-Talaud is sensitive to temperature changes, indicating its vulnerability to future warming events.
Assessment of Sensitivity and Validity Hydrodynamic Model in Cisadane Using Delft3d Flow Model
Authors: Pasma Gumilang Ramadhan , Suharyanto Hamzah Haru Radityo , Khoirunnisa Hanah , Wijayanti Reni , Gumbira Gugum , Rachman Reno Arief
Published: April 2024

The National Capital Integrated Coastal Development (NCICD) program was prioritized as a disaster reduction technology within the annual target of BRIN in 2022. It is a part of the North Java Coastal Integrated Development Program project. A coastal reservoir development plan at the Cisadane River estuary is one of the outcomes. In this case, hydrodynamic modelling is needed to acquire hydrodynamic properties under the existing condition of Cisadane downstream, and it applied the Delft3D-FLOW model. The bathymetric data used in this simulation was obtained from the assimilation of national bathymetric data with a grid spacing of 180 m and field survey data with a horizontal resolution of 10 m and transect spacing of 200 m seaward of the Cisadane estuary. It has interpolated in a regular structured grid with 100 m and 50 m grid spacing. In addition, other data used are three hourly wind data downloaded from the European Centre for Medium-Range Weather Forecasts (ECMWF) and the daily discharge of the Cisadane River in 2021. Astronomical water level data generated from TPXO 7.2 and TPXO 8 were used in the boundary conditions. These data are simulated using the two and three-dimensional flow model Delft3D-FLOW during November 1 – 15, 2021, using four manning coefficients (n) values, which are 0.03; 0.035; 0.04; and 0.045. The validation formulation used Normalization Root Mean Square Error (NRMSE), resulting in 5.3 - 9.6% for all the manning values and domains. The highest correlation coefficient of current velocity (u-v components) is acquired in the 10 km2 domain with 0.797 for the L3 (bottom layer).
Growth, Development and Survival Rate of The Blue Swimming Crab (Portunus pelagicus) Cultured using Different Larvae Feeds
Authors: Rabby Ahmad Fazley , Rahman Turabur , Islam Zahidul , Hasan Jakia , Aktaruzzaman Md , Rahman Shafiqur , Karim Ehsanul , Ali Md Zulfikar
Published: April 2024

Blue swimming crab (Portunus pelagicus) is one of the most important commodities of softshell industry. Besides mud crab its demand as feed is increasing day by day. As a coastal dominant country, Bangladesh has a great feasibility of this species in culture, production, use and export. However, the production contribution from Bangladesh is still from natural sources and far behind in terms of farming, culture and production. Optimization of larval rearing techniques is therefore important to develop intensive hatchery rearing technique for this species. So, this study is aimed to develop larvae production technique of Portunus pelagicus with a better survival rate. Newly hatched first zoeal of Portunus pelagicus were reared using three different diets till second zoeal stage: (Treatment 1= Artemia franciscana umbrella + Rotifer (Brachionus rotundiformis); Treatment 2= Rotifer (B. rotundiformis) and Treatment 3= Artemia franciscana umbrella). Then, Artemia franciscana nauplii were used for all three treatments till they metamorphosed to crab instar. Regularly, water quality parameters were monitored and maintained and the survival and molting to next stages was observed. The result showed that, all the hatched zoea of P. pelagicus could successfully turns into crab instar stage under all the treatment applied, but the highest survival rate 6.08% was found in case of treatment 2 followed by 0.58%, 0.91%, respectively in treatment 1 and 3. In terms of metamorphosis, it took more than 15 and 14 days respectively from zoea 1 to metamorphose into megalopa for treatments 1 and 3, whereas metamorphosis from zoea 1 to megalopa in treatment 2 finished at the 12th day with a higher Larval Stage Index (LSI) value which was 4.9. Finally, at the 15th day larvae were metamorphosed into crablet for treatment 2 and 18 and 16 days required for metamorphosis into crablets for treatment 1 and 3, respectively. However, the larval feed showed a significant effect on growth and survival of P. pelagicus larvae, whereas the earlier larval stage of P. pelagicus rearing with Rotifer (B. rotundiformis) is found as the most suitable diet.
Estimation of Suspended Particulate Matter Using Landsat 9 Imagery: Generating Algorithms and Spatio-Temporal Distributions
Authors: Maslukah Lilik , Sadewo M. Firouz Dimas , Rochaddi Baskoro , Widada Sugeng , Wirasatriya Anindya , Wisha Ulung Jantama
Published: April 2024

The fluctuation of suspended particulate matter (SPM) is essential to the biogeochemical cycle and ecological health of coastal waters. Anthropogenic activities potentially trigger an increase in SPM, so it needs to be monitored continuously. Spatial and temporal monitoring of SPM can be carried out cost-effectively with broad coverage using a remote sensing application. This study aims to build the SPM algorithm and estimate its temporal variability. The algorithm model in this study is based on an empirical formula between field data and reflectance data with the same acquisition. Water samples were taken from 100 stations in July 2022. Half were used for model building and the other for model validation. Suspended Particulate Matter was determined gravimetrically and estimated their temporal variability was based on Landsat 9 image records from December 2021 - November 2022. The results of the analysis show that the best algorithm for SPM estimation can be built based on coastal aerosol canals (B1), blue canals (B2), and green canals (B3) with the accuracy test result of (R2 = 0.68; RMSE = 5.551 mg.L-1; MAPE= 7.07%; Bias= 0.28). The SPM temporal fluctuations were generally higher in the west monsoon and lowered in the east monsoon, ranging from 30 to 70 mg.L-1. On the other hand, the spatial distribution shows a higher magnitude in the estuary than in the offshore waters, with a deviation of about 30 mg.L-1. Regional authorities can use the results obtained to improve the management of coastal water quality and monitoring systems.
Seagrass Biodiversity and its Drivers in the Kepulauan Banyak Marine Nature Park, Indonesia
Authors: Nasution Muhammad Arif , Hermi Rudi , Heriansyah Heriansyah , Lubis Friyuanita , Saputra Fazril , Ammar Esraa E , Akbar Helmy
Published: April 2024

Seagrasses are important marine plants that provide a variety of ecosystem services, including food and shelter for marine life, and protection from coastal erosion. This study investigated the biodiversity (alpha and beta diversity) of seagrass in the Kepulauan Banyak Marine Nature Park, Indonesia, with a specific focus on eight sites. Alpha diversity was calculated using Shannon's index, Simpson's index, and Pielou evenness. Beta diversity was determined using Bray-Curtis dissimilarity and Jaccard dissimilarity allowing us to examine the variations in species composition among different sites. Principal coordinate analysis and Partial distance-based redundancy analysis was used to visualize and investigate the impact of constraint variables to the structure of the seagrass communities. Alpha diversity varied among the sites, with the highest alpha diversity found at the Orongan and Matahari site and the lowest at the Ujung Lolok and Balai sites. The dominant substrate type (mud or sand) was found to be a significant (P≤ 0.01) determinant of seagrass alpha diversity, with mud substrates supporting higher diversity than sand substrates. The relationship between alpha diversity and constrain variables was only significant with closest distance to forest lost and longitude variables. The analysis found that water pH, closest distance to forest lost, mean distance to tourism spots, and closest distance to settlement collectively explained a significant (P≤ 0.001) portion (88.48%) of the variation in beta diversity of seagrass across the sites. The results of this study can be used to develop management strategies for the conservation of seagrass meadows in the park.
Relationship Between Environmental Parameters and Manta Ray Occurrence in Raja Ampat Archipelago, Indonesia
Authors: Runtuboi Ferawati , Bengen Dietriech Geoffrey , Nurjaya I Wayan , Natih Nyoman Metta N , Zulfikar Andi , Beale Calvin S.
Published: April 2024

Understanding the influence and impact of environmental factors on manta ray sightings is critical to understanding the spatial and temporal ecology of a highly mobile species. Therefore, this study aims to determine the influence and impact of environmental factors as indicated by the parameters of wind speed, chlorophyll-a, SST, salinity, pH, dissolved oxygen, and the number of phytoplankton and zooplankton species. The mapped chlorophyll-a was re-analyzed based on the seasonal period throughout 2021 downloaded from marine copernicus and analyzed by kriging method. The influence and effects of environmental parameters on the short-term appearance of eye rays were studied using an adaptive model (GAM). The analysis showed a significant influence of environmental factors on manta ray sightings in Raja Ampat, namely Calanoid spp, Oithona nana, Acartia clausi, Calanus helgoladicus, and Oithona brevicornis. Based on this model, zooplankton is an important parameter that can describe the influence of environmental parameters on manta ray sightings at observation points in Raja Ampat MPA. The results of the reanalysis of chlorophyll-a concentrations were highest in the eastern to transitional seasons, which were scattered on the west side of Raja Ampat waters. Meanwhile, chlorophyll-a concentrations were low in the west to transitional season on the east side. This mechanism may drive the foraging strategy of manta rays, which visit shallow waters where zooplankton density and biomass are abundant. Adopting the BHS MPA network concept, as it has been implemented, would be in line with broader conservation expectations for the sustainability of manta rays in Raja Ampat.
Sexualita jako riziko? Sexuální výchova v českých kurikulárních dokumentech
Authors: Benešovská Barbora , Krišová Dagmar , Macháčková Marcela
Published: April 2024

Formal sex education and its implementation in education have been increasingly debated in recent years. In the Czech Republic, the area came to the centre of public policy interest in early 2023, when, in response to several sexual harassment cases, former Minister of Education, Mr. Balaš, expressed the need to strengthen sex education in schools. With the ongoing revision of the national Framework Educational Programme and the awareness of the lack of research coverage in this area, we consider it appropriate to look at how sex education is framed in institutional documents in the Czech Republic today. We conduct a qualitative analysis of the Recommendation of the Ministry of Education for the Implementation of Sexuality Education in Primary Schools, selected school education programmes and minimum prevention programmes. We compare these with the principles, rationale and topics articulated in the Standards for Sexuality Education in Europe, which were developed to support the implementation of holistic sexuality education. We point out significant differences in the conceptualisation of the Czech documents, particularly the normative, biologizing and risk-oriented sex education. We see the untold potential for a quality approach to sex education, which takes into account the sexual subjectivity and uniqueness of adolescents’ experience and the interactive nature of sexuality, which the Standards for Sexuality Education in Europe emphasize, in the areas of Education for Citizenship, Ethics Education or in Social and Personal Development.
Microscopical, phytochemical, and LC/MS analysis of Ginkgo biloba leaves
Authors: Eldalawy Rasha , Mohsen Nasser Noor , Hussein Asmaa Mahdi
Published: April 2024

Every medicinal practitioner knows Ginkgo as the plant source of an extract that is good for memory improvement. Ginkgo biloba extract is classified as one of the medicines in the treatment of dementia and social exclusion brought by vascular or neurodegenerative disorders. In such disorders, the extract was reported to be successful in improving symptoms such as depression, attention, memory disturbances, vertigo, tinnitus, and anxiety. The aerial part of Ginkgo bioloba was obtained from China, Utilizing fresh leaves allows for a microscopic inspection, the concentrated extracts by soxhlet were screened by standard methods for the qualitative investigation of secondary metabolites present in the plant, and a small quantity of extract was analyzed by LC/MS instrument. Microscopical examination shows diacytic stomata, helical vessels, fiber, and unicellular unbranched trichomes. Qualitative analysis is positive for tannin, glycoside, flavonoid, terpene, and phenolic compounds detected while saponin, coumarin, and alkaloid gave a negative result. While LC/MS shows important compounds that have important biological activities such as phenolic acids, flavonoids, and flavonoid glycosides which are reported for their different pharmacological activity, the Ginkgo plant is a promising drug that can help in the treatment of different diseases and required further studies.
Preparation of an inclusion complex of nickel-based β-cyclodextrin: Characterization and accelerating the osteoarthritis articular cartilage repair
Authors: Ji Fengkun , Zeng Xu , Wang Zhendong , Chen Hui , Li Wenchao , Li Haoyu
Published: April 2024

Osteoarthritis is caused by the cartilage destruction of the bones of the joint surfaces and structures that produce synovium fluid. Osteoarthritis treatment includes the use of surgical methods and non-surgical or maintenance treatments including knee orthoses, medical insoles with external edges, use of physiotherapy techniques, exercise, weight loss in obese people, and teaching the principles of joint care. The main goal of treatment in osteoarthritis of the knee is to ameliorate physical function, decrease pain, and reduce the progression of the disease, through correcting the knee alignment and reducing the varus torque. Previous studies have indicated that medicinal plants and herbal nanoparticles (NPs) have the best anti-inflammatory effects. β-Cyclodextrin is a cyclic carbohydrate molecule that is used as a host to prepare inclusion complexes. In this study, the synthesis of nickel NPs is based on β-cyclodextrin (NiBCD NPs) for accelerating the osteoarthritis articular cartilage repair. The FT-IR and XRD techniques confirmed the formula of NiO for the NiBCD NPs. The FE-SEM imaging shows a non-spherical structure for NiBCD NPs with a size of less than 100 nm. In EDX, the signals at the energy levels of 8.3, 7.5, and 0.87 keV are assigned for the electron migration of Ni Kβ, Ni Kα, and Ni Lα. Furthermore, the signals for the elements of oxygen and carbon of BCD appeared at 0.52 and 0.28 keV. The effectiveness of NiBCD NPs in promoting chondrogenesis was examined in orthopedic experiments using primary cultured chondrocytes. Subsequently, we determined the functional restoration following NiBCD NPs’ transplantation in a knee osteoarthritis articular cartilage injury model. We conducted histological, PCR, and Western blot assays. In the immunological analysis, the levels of MMPs, IL-1β, TNF-α, and p-p65 expression were found to be reduced by NiBCD NPs. This reduction may be attributed to the regulation of cellular redox homeostasis through Nrf2. Furthermore, our findings demonstrated the positive impact of NiBCD NPs on stimulating chondrogenesis in vitro. Notably, the NiBCD NPs’ application accelerated the recovery of injury-induced dysfunction. Additionally, the presence of NiBCD NPs at the injury site suppressed abnormal fibrosis and angiogenesis. The histological assay revealed the chondrocytes’ proliferation and increased cartilage matrix synthesis in the NiBCD NPs’ presence.
Publishing strategies and professional demarcations: Enacting media logic(s) in European academic climate communication through open letters
Authors: Graminius Carin
Published: April 2024

The mediatization concept rests on the increasing centrality of media in everyday spheres. Within academia, mediatization is explored in various ways, such as through the use of social media, news media, and researchers’ adoption of certain media logic(s). While many studies focus on media logic(s) as an explanatory device, it can also be seen as a contextual relationship between actors enacted for various purposes. This paper explores how academics enact media logic(s) in climate communication and for what purpose. By drawing on interviews with initiators of open letters on climate change, this paper illustrates that media logic(s) is evoked as a publishing strategy and a way to demarcate academics from news media journalists. The study thus suggests a conceptual shift from debates about what media logic(s) is to what it does in specific communication contexts.
Face-to-Face & digital: Die interaktive und multimodale Herstellung digitalisierter Handlungsräume in Kopräsenz
Authors: Oloff Florence , König Katharina
Published: April 2024

In this contribution we analyse how mobile device users in face-to-face communication jointly negotiate the boundaries and action spaces between digital and non-digital, shared and individual, public and private. Instead of conceptualising digital and face-to-face, i. e., non-digital, communication as separate, more recent research emphasises that social practices relying on mobile devices increasingly connect physical and virtual communicative spaces. Using multimodal conversation analysis, we investigate the situated use of mobile devices and media in social interaction. Excerpts from videotaped everyday conversations illustrate how participants frame their smartphone use in the presence of others, such as when looking at digital pictures, or when recording voice messages. A detailed analysis of verbal and embodied conduct shows how participants negotiate and interpret the connection or separation of digital and non-digital activities and possible forms of participation within these. (Digital) publicness or privacy are therefore to be understood as an interactive accomplishment.
Concentrator photovoltaic module based on silicon photoconverters
Authors: Chernenko V. V. , Kostylyov V. P. , Korkishko R. М. , Dvernikov B. F. , Pekur D. V. , Kolomzarov Yu. V. , Kornaga V. І. , Sorokin V. М.
Published: April 2024

The task of reducing the cost of an energy unit obtained by the photovoltaic method remains relevant. One of the effective methods of reducing the production cost of energy units is to use installations that concentrate solar irradiation. In this study, the authors develop design and technological solutions and use silicon backside contact photoconverters with a rear placement of the collector p–n-junction and both contact electrodes to make a solar photovoltaic module of the required size. This photovoltaic module with front surface dimensions of 0.42×0.05 m2 is intended for use in a solar power plant with the parabola-cylindrical concentrator. The first stage of experimental and theoretical research of photovoltaic characteristics of the solar module is carried out in the conditions of unconcentrated and weakly concentrated solar irradiation. It is established that the used solar photoconverters have fairly low values of the series resistance and the solar photovoltaic module has a sufficiently high efficiency of the photovoltaic conversion. It is planned to further test the developed solar module in the conditions of natural sunlight irradiation concentrated 20-fold, which will allow determining the ways to improve its characteristics.
Models and algorithms for optimizing the location of solar batteries
Authors: Yefimenko A. A. , Prisyazhniuk L. I.
Published: April 2024

The study aimed to create a method for optimizing the position of solar batteries with fixed location to increase their efficiency, namely, the generation of maximum energy during a certain time, as well as reducing the unevenness of electricity generation over time.
The study allowed developing a method of optimizing the position of solar batteries to increase their efficiency, namely obtaining the maximum electrical energy generation both with a completely fixed location of solar batteries and with a seasonal change in position.
The developed models and algorithms, the given examples and the results of their solution with the construction of polynomial regressions and their graphical representation, integration of polynomials to obtain the values of the generated energy give a clear idea of the application of the method of optimizing the position of solar panels to maximize the generated energy and equalize the generation characteristics over time, as well as ways to develop them further.
The theoretical research made it possible to solve an important scientific and technical problem of increasing the performance of solar batteries by placing them in an optimal position relative to the Sun. The model of placement of the solar battery and the method that allows optimizing its position were further developed. The field of using the Matlab computer program for simulating the operation of solar batteries was further expanded. For the first time, the work offers a model and method of using solar cells with different positions relative to the Sun designed to increase the amount of electric energy generated and equalize the energy generation characteristic, which is expressed as a dependence of power over time. For this purpose, the authors introduce the coefficient of unevenness of the generation characteristic, which establishes the relationship between the maximum power and the capacities at other moments of time and allows objectively evaluating the unevenness of the characteristic.
The practical value of the proposed solutions consists in the ability to simulate the operation of the solar battery in various conditions based on experimental studies and using the Matlab computer system.
Increasing the sensitivity and radiation resistance of temperature sensor-converters using generators based on unijunction transistors
Authors: Vikulin I. M. , Vikulinа L. F. , Markolenko P. Yu. , Nazarenko O. A.
Published: April 2024

The authors experimentally study the influence of temperature and radiation on the characteristics of generators based on a unijunction transistor (UJT). It is shown that when using a UJT-based generator as a sensor-converter with a frequency output, field-effect transistors are placed into the UJT emitter and base circuits to increase the dependence of frequency on temperature. Maximum sensitivity with direct dependence of frequency on temperature is achieved when a field-effect MOS transistor is connected to the emitter circuit UJT, and a field-effect transistor with a p-n junction is connected to the base circuit. The influence of radiation on the thermal sensitivity of generators is studied. The component transistors are irradiated with a flow of electrons, γ-quanta and neutrons. It is established that the irradiation of each transistor has a different effect on the initial frequency of the generator; it either decreases or increases. It is shown that it is possible to reduce the dependence of the output frequency on radiation using a transistor generator circuit with the opposite sign of the change in the generator frequency due to radiation. Maximum compensation for the effect of radiation on the output signal can be obtained by using a MOS transistor in the UJT emitter circuit, and a transistor with a p-n junction in the base circuit. The study establishes the limit values for fluxes of various radiations, after which the generator stops working.
Analysis of river drying in Slovenia
Authors: Cvelfer Domadenik Jan , Šraj Mojca , Kobold Mira
Published: April 2024

Intermittent watercourses lack water during some periods of the year, which especially applies to karst sinking streams. Droughts also occur in dry periods with no rainfall over a longer period of time. The drying up of Slovenian rivers was analysed using the data from the state hydrological monitoring of the Slovenian Environment Agency. By analysing the periodic statistics of minimum low discharges (nQnp), 18 gauging stations were extracted where the watercourses dried up during the measurement period. For these stations, sets of mean daily discharges were analysed, and dry days where the flow was equal to zero were listed. The number of dry days and the number of consecutive dry days were analysed by month and year, and the longest dry periods were determined. The results are presented graphically. At most of the gauging stations considered, the number of dry days was the highest in the years characterized by extreme hydrological droughts, namely 2003, 2012, and 1993. In some watercourses, drying up is a constant phenomenon that occurs almost every year, while others only dry up in years characterized by extreme droughts. Exceptions to this are the karst rivers, which sink and are therefore dry for part of the year. The Pivka and Branica Rivers regularly dry up. Watercourses in Pomurje and Velunja, Kožbanjšček, and Dragonja also dry up very often. Analysis results demonstrated that river drying has become more frequent in the past two decades. The driest month is August, followed by July and September.
Expansión de sistemas de transmisión eléctrica usando tablas de probabilidad de pérdida de capacidad en el modelo generación-transmisión
Authors: Maita-Sánchez Santiago Javier , Barrera-Singaña Carlos Andrés
Published: April 2024

Los sistemas eléctricos de potencia, en la etapa de generación-transmisión tienen gran preponderancia a nivel mundial. Estos sistemas constituyen la vía para distribuir vastas cantidades de energía eléctrica desde los centros de generación eléctrica hacia los distintos sectores de consumo. La planeación de la expansión de los sistemas de generación y transmisión tiene una gran representatividad, por lo que atender la respuesta de la demanda y su crecimiento es el desafío de las empresas dedicadas a este giro de negocio. En este trabajo, se planea la expansión del sistema de generación y transmisión en un sistema eléctrico de prueba mediante dos fases. En primera instancia, se desarrolla un algoritmo que permita construir tablas de probabilidad de pérdida de capacidad y utilizar criterios de confiabilidad para determinar los nuevos proyectos de generación necesarios para cubrir la demanda y tener la reserva necesaria al año horizonte de planificación. Con los resultados de la primera fase se da apertura a la segunda fase, en la cual se utiliza un algoritmo de optimización para un problema de carácter entero lineal mixto y aplicación del flujo óptimo de potencia DC para determinar los proyectos de transmisión necesarios para conectar, al sistema base, los nuevos proyectos de generación determinados en la primera fase y su despacho de potencia óptimo para minimizar costos tanto de inversión como de operación.
Crisis sanitaria y plataformas para la formación superior remota: herramientas como medios y no como fines
Authors: D’Antoni Fattori Maurizia , Gómez Torres Juan
Published: April 2024

The paper reflects on the impact of the health crisis on higher education in Costa Rica, specifically since the year 2020. It aims to demonstrate the scope and limitations of a virtualized education for higher education in Costa Rica. It is based on a reflection not derived from an investigation; that is, it recovers theoretical perspectives on the object of study, and it opens the possibility of debates and meeting points, generating a documentary reflection that problematizes the feelings and experiences of teachers, students, and researchers in the face of the health crisis caused by COVID-19. It is essential to take advantage of the health emergency to criticize the technicist past or the verbal, vertical, and numerical tradition of Costa Rican education and rediscover participatory democracy in the classroom, even in emergency contexts.
El habitus ciudadano en el programa costarricense de Educación Cívica del proyecto Ética, Estética y Ciudadanía
Authors: Calderón Méndez Rafael
Published: April 2024

This article deals with the thorough reflection regarding the desirable citizen profile stated by the Ministry of Public Education in the Costa Rican Civic Education Syllabus through the concept of citizen habitus constituted within the structuralism-constructivism. In order to achieve this, the researcher first analyzed the work of the sociologist Pierre Bourdieu to build a theoretical-conceptual proposal of the citizen habitus concept. Secondly, the author conducted a qualitative content analysis of the Civic Education Syllabus to establish basic lines to set a general outlines of the citizen habitus established as expected by the Ministry of Public Education. Finally, the researcher stated a series of considerations that aim to contribute to expand the perspective of analysis, reflection, and debate in terms of the Civic Education in the educational phenomenon.
El uso de infografías para fortalecer la integridad académica: experiencia de la Escuela de Ciencias de la Educación de la Universidad Estatal a Distancia de Costa Rica
Authors: Solano Fallas Andrés , Vargas Víquez Ana María , Madriz Bermúdez Linda María
Published: April 2024

This article is a systematization of the experience carried out by the Academic Integrity Team (ETIA in Spanish) of the School of Educational Sciences (ECE in Spanish) of the State Distance University of Costa Rica (UNED in Spanish), with the aim of raising awareness of academic integrity as a response to the increase in fraudulent practices that occurred during the year 2020, as a result of the massive virtualization of subjects, on account of the COVID-19 pandemic. Seeking to transcend the traditional punitive approach to academic fraud used as a strategy, two series of ten infographics were produced, under three key axes (awareness training, theoretical, and reflective), which address both regulatory theoretical aspects of academic fraud and plagiarism, as well as surrounding elements of learning that affect academic success. Having said this, the main result of the experience was that the work carried out by the ETIA was reflected in a reduction in the number of complaints about academic fraud and the like filed with the ECE, which suggests not only the relevance of the strategy, but also of the theoretical axes that guided it.
Hacer un alto: Articulación de las pedagogías de las diferencias en el contexto de la docencia universitaria
Authors: Jimenez Cerdas Tatiana
Published: April 2024

The pedagogies of differences are based on recognizing the other person, talking to make educational processes create and new knowledge within an immediate context, which pushes the educational system to respond to certain parameters or indicators from doing and teach in classrooms. Therefore, the proposed objective is to reflect on the exercise of university teaching from the pedagogies of differences proposed by Carlos Skliar. As a result of the above, it is considered the relevance of making a stop in the rush so as not to overlook the training processes of the students; recognize the multiplicity, doing education and conversation within the university context; as well as otherness as an important aspect within the educational weighing, since it reveals a "normality", which cannot be sustained within university classrooms. Therefore, the articulation of the pedagogies of differences for university teaching lies in reflecting on the urgency, resuming the conversation in the classroom, as well as the responsibility of the teacher and recognizing the people who are part of the pedagogical act.
Cambio de paradigma: hacia una nueva educación y visión de vida
Authors: Delgado Álvarez Franklin Alberto
Published: April 2024

This essay shows an approach towards a change of paradigm in education, which presents the teaching-learning process from a different perspective, different from what is usually known as traditional education. Traditional education, as we know it at present time, has an orthodox type of approach, depending on the institution, with certain imposing rules for the learner, with no room for creAction and spontaneity. Education goes towards an emerging paradigm through art, creActivity, and virtuality. We got used to have the teacher as the owner of the class, in a behaviorist model, but in real life the learner must be the actor in the educational process. We are going towards a new order and a new civilization, towards new worlds where technology guides us in the age of information.
Advancing Research Reproducibility in Machine Learning through Blockchain Technology
Authors: Filatovas Ernestas , Stripinis Linas , Orts Francisco , Paulavičius Remigijus
Published: April 2024

Like other disciplines, machine learning is currently facing a reproducibility crisis that hinders the advancement of scientific research. Researchers face difficulties reproducing key results due to the lack of critical details, including the disconnection between publications and associated models, data, parameter settings, and experimental results. To promote transparency and trust in research, solutions that improve the accessibility of models and data, facilitate experiment tracking, and allow audit of experimental results are needed. Blockchain technology, characterized by its decentralization, data immutability, cryptographic hash functions, consensus algorithms, robust security measures, access control mechanisms, and innovative smart contracts, offers a compelling pathway for the development of such solutions. To address the reproducibility challenges in machine learning, we present a novel concept of a blockchain-based platform that operates on a peer-to-peer network. This network comprises organizations and researchers actively engaged in machine learning research, seamlessly integrating various machine learning research and development frameworks. To validate the viability of our proposed concept, we implemented a blockchain network using the Hyperledger Fabric infrastructure and conducted experimental simulations in several scenarios to thoroughly evaluate its effectiveness. By fostering transparency and facilitating collaboration, our proposed platform has the potential to significantly improve reproducible research in machine learning and can be adapted to other domains within artificial intelligence.
Magnetite-ferrocyanide-copper sorbents for recovery of cesium ions from low-activity liquid radioactive waters
Authors: Sergii Guzii , Oksana Arkhypenko , Lyudmila Odukalets , Olena Prysiazhna , Nina Rashkevich
Published: April 2024

The article is devoted to the development of nanoscale sorbents based on copper ferrocyanide and magnetites for the removal of cesium, strontium, and heavy metal ions in their simultaneous presence in a multicomponent two-phase low-level radioactive solution containing complexing agents and surfactants. It they noted that the highest values of cesium ion removal from low-level radioactive water - 99.96% and 99.62% - are obtained with sorbents based on 100% copper ferrocyanide and a mixture of copper ferrocyanide and industrial magnetite in a ratio of 2 to 1. The efficiency of the sorbents in terms of the distribution coefficient is 2394 and 1589.7 ml/g, which ensures the purification of radioactive water from trace concentrations of cesium ions to values of 2394 and 265.11. These sorbents provide water purification to values less than 2 Bq/cm3, which is typical for 1-4 classes of water quality in terms of radiation safety of groundwater and surface water as sources of centralised drinking water supply. It is noted that sorption of cesium ions on copper ferrocyanide and magnetite is carried out in the presence of water molecules and hydroxo groups. It is shown that artificial magnetite in its pure form exceeds the sorption capacity of industrial magnetite. This is due to the difference in the phase composition and particle size of the crystals. The results obtained will be use as components of the technological process in the Plasma-Sorb technology developed at the State Institution "The Institute of Environmental Geochemistry" of the National Academy of Sciences of Ukraine for the treatment of low- and intermediate-level radioactive water from Ukrainian nuclear power plants.
РІЗНІ ФОРМИ ПРОЯВУ ІНТЕЛЕКТУ ЯК ПЕРЕДУМОВИ ЯКОСТІ ЖИТТЯ
Authors: Аршава І.Ф. , Носенко Е.Л.
Published: April 2024

У статті теоретично обґрунтовано значущість для якості життя людини рівнів сформованості в неї трьох базових форм прояву інтелекту: когнітивного, емоційного і позитивного, у термінах яких можна оцінити, як людина мислить, емоційно реагує і діє під час виконання основних життєвих задач. На вибірці 60 дорослих досліджуваних, які мають вищу освіту, встановлено, що індивідууми, які відчувають порівняно більш високий рівень якості життя, при відсутності значущих відмінностей у рівнях когнітивного інтелекту, характеризуються більш високими рівнями прояву двох основних складових емоційного інтелекту і загального показника позитивного інтелекту. Обґрунтовано доцільність цілеспрямованого ознайомлення здобувачів вищої освіти із змістом різних форм прояву інтелекту і визначено деякі напрями прикладних досліджень проблеми.
ЧАЙЛДФРІ – НОВИЙ ФЕНОМЕН І ЙОГО ОКРЕМІ ПСИХОЛОГІЧНІ КОРЕЛЯТИ
Authors: Байєр О.О. , Глушко О.І.
Published: April 2024

Феномен чайлдфрі, тобто свідомої відмови народжувати та виховувати дітей, набуває все більшого поширення як у світі в цілому, так і в Україні зокрема. Надається визначення явищу чайлдфрі та наводиться стисла характеристика виникнення даного та пов’язаних з ним термінів. В якості можливих пояснень цього явища наведено результати демографічного, соціологічного та психологічного аналізу характеристик осіб-чайлдфрі поряд з розвіюванням основних стереотипів стосовно них. Показана виправданість відкидання дихотомії “батьківство - чайлдфрі” на користь підходу до розгляду рішення щодо не-батьківства через квір-парадигму.
ОСОБЛИВОСТІ ПРОЯВУ ВІКТИМНОСТІ У ЖЕРТВ ВИКРАДЕННЯ ТРАНСПОРТНОГО ЗАСОБУ
Authors: Богучарова О.І. , Коваленко А.Б. , Тишакова Л.Т.
Published: April 2024

Досліджено психологічні аспекти незаконного викрадення транспортного засобу як ситуацію втрати значущого предмету (автомобіль) та фактор віктимізації, учасника транспортного злочину. Наведено експериментальні результати від’ємного кореляційного зв’язку загального і соціального інтелекту та копінгових і когнітивно-емоційних стратегій поведінки, а також впливу даного зв’язку на посткримінальну віктимізацію особистості потерпілих водіїв. Автори доходять висновку про високий запит на психологічну підтримку постраждалих в транспортних злочинах.
ЦІННІСНІ ОРІЄНТАЦІЇ СТАРШОКЛАСНИКІВ З РІЗНИМ РІВНЕМ СХИЛЬНОСТІ ДО ДЕВІАНТНОЇ ПОВЕДІНКИ
Authors: Кутовий К. П. , Аршава І. О.
Published: April 2024

У статті теоретично та емпірично досліджено важливість формування у підлітковому віці позитивних цінностей як фактору попередження розвитку схильності до девіантної поведінки. На вибірці досліджуваних, учнів старших класів, встановлено, що особливості ціннісних орієнтацій підлітків, вираженість позитивних цінностей та «сильних» властивостей особистості можуть виступати в якості важливих предикторів схильності до девіантної поведінки.
ПРОФЕСІЙНА СВІДОМІСТЬ ПРАКТИКУЮЧИХ ПСИХОЛОГІВ-ПOЧAТКIВЦIВ: СПЕЦИФІКА РОЗВИТКУ
Authors: Шевченко Н. Ф. , Чепішко О. І.
Published: April 2024

У статті представлено результати теоретичного аналізу проблеми та емпіричного дослідження розвитку професійної свідомості практикуючих психологів-початківців. Подано визначення поняття «професійна свідомість» та окреслено специфіку професійної діяльності психолога-практика. Розглянуто варіанти професіоналізації практикуючих психологів та специфіку розвитку професійної свідомості психологів-початківців. В ході емпіричного дослідження виявлено ставлення фахівців-початківців до професії психолога-практика. Встановлено, що значна частина респондентів задоволені вибором професії, усвідомлюють власне покликання до обраної сфери професійної діяльності, відчувають реалізацію власного внутрішнього потенціалу, мають наміри в майбутньому працювати практикуючими психологами.