THE INFLUENCE OF FORCED CARBONIZATION ON THE PROPERTIES OF GYPSUM-LIME SYSTEMS BASED ON SECONDARY RAW MATERIALS

the use of secondary raw materials for the production of building materials is a modern trend in solving environmental problems. In the Republic of Crimea, dumps of secondary raw materials – phosphogypsum and lime dust – have accumulated in large quantities at various enterprises. The analysis of phosphogypsum, which has been in the dumps for more than 5 years, showed that by its quality indicators it can be attributed to the 2nd grade in accordance with GOST 4013-2019, and the specific effective activity of the material (Aeff) corresponds to the I class of materials, which makes it suitable for the production of gypsum binders. Prototypes-cylinders were made from a mixture of phosphogypsum with lime dust of 1:1 composition at a pressure of 30 MPa and then subjected to hardening according to three schemes, in order to separate the passage of various types of hardening and study each of them for the physico-mechanical properties of the resulting material. The analysis of experimental data made it possible to establish the effectiveness of simultaneous flow in the system of two types of hardening – carbonate and hydration for lime and phosphogypsum components of the raw mixture, respectively. As a result of the organization of a mixed type of hardening of gypsum-lime binder, samples with a compressive strength of 26.5 MPa and a softening coefficient of 0.63 were obtained within 90 minutes. The calcium carbonate formed in the process, which is the product of the reaction between calcium hydroxide and carbon dioxide, significantly increases the water resistance of the hydration products of gypsum binder. It is established that with an optimal combination of technological factors and hardening conditions, a significant increase in the physical and mechanical characteristics of the carbonized material is possible in a short time.

Multiple Faces of the Glioblastoma Microenvironment

The tumor microenvironment is a highly dynamic accumulation of resident and infiltrating tumor cells, responsible for growth and invasion. The authors focused on the leading-edge concepts regarding the glioblastoma microenvironment. Due to the fact that the modern trend in the research and treatment of glioblastoma is represented by multiple approaches that target not only the primary tumor but also the neighboring tissue, the study of the microenvironment in the peritumoral tissue is an appealing direction for current and future therapies.

Efficiency in Chinese Large Yellow Croaker Aquaculture: Implication for Sustainable Aquaculture in China

Aquaculture supply from China has been a remedy to meet the growing global demand for seafood in the last decades. However, output growth has decreased dramatically in China in the 2000s. Previous literature focuses on the ecosystem problems arising in intensive farming in China. In this study, we used stochastic production analysis (SPA) to estimate the technical efficiency of Chinese large yellow croaker farming, which provides implications for impediments to the sustainable development of Chinese aquaculture. Data were collected from 430 large yellow croaker farmers in nine farming areas located along the coastline of southeastern China. The technical efficiency of large yellow croak farming is estimated to be 0.829, suggesting that farming is operated close to the production frontier with a maximal margin of 17% for improvement under the current technology. It further suggests that Chinese aquaculture growth is geared by conventional factors, expansion of fishing sites, and intensive farming, and is not sustainable under the constraint of farming areas and environmental problems in China. For the sustainable development of Chinese aquaculture, it is necessary to adopt new technology through innovation. The family-based farming model is a hinder to adopting new technology that requires systematic significant investment. Large-scale industrialized farming based on research and new technology development thus should be a modern trend in the future.

The trend of post-primary education in New Zealand

This thesis traces the history of post-primary education and shows the modern trend by describing in detail modern types of post-primary schools, tracing in particular the genesis and development of Junior High Schools and the New Plymouth Combined High School.

The trend of post-primary education in New Zealand

This thesis traces the history of post-primary education and shows the modern trend by describing in detail modern types of post-primary schools, tracing in particular the genesis and development of Junior High Schools and the New Plymouth Combined High School.

Configurable IoT Open-Source Hardware and Software I-V Curve Tracer for Photovoltaic Generators

Photovoltaic (PV) energy is a renewable energy resource which is being widely integrated in intelligent power grids, smart grids, and microgrids. To characterize and monitor the behavior of PV modules, current-voltage (I-V) curves are essential. In this regard, Internet of Things (IoT) technologies provide versatile and powerful tools, constituting a modern trend in the design of sensing and data acquisition systems for I-V curve tracing. This paper presents a novel I-V curve tracer based on IoT open-source hardware and software. Namely, a Raspberry Pi microcomputer composes the hardware level, whilst the applied software comprises mariaDB, Python, and Grafana. All the tasks required for curve tracing are automated: load sweep, data acquisition, data storage, communications, and real-time visualization. Modern and legacy communication protocols are handled for seamless data exchange with a programmable logic controller and a programmable load. The development of the system is expounded, and experimental results are reported to prove the suitability and validity of the proposal. In particular, I-V curve tracing of a monocrystalline PV generator under real operating conditions is successfully conducted.

Application of Digitalisation in Staffing Planning for Railway Infrastructure Maintenance

Existing and suggested approaches to development of staffing plans regarding infrastructure maintenance are analysed from the point of view of ensuring interests of a railway infrastructure company, using example of JSC Russian Railways.The existing methodology of planning workforce involved in maintenance of the railway infrastructure is based on the use of average values of parameters resulted from monitoring of the state of infrastructure structures, roadbed and track devices conducted monthly, as well as during autumn and spring continuous inspections and checks of the track. The received values of work to be performed only implicitly reflect the required number of workers, effective involvement in operation, and efficiency of each worker.The modern trend towards digitalisation and cybernation of all processes, when organising maintenance of the track infrastructure, provides for maximum social adaptation of production processes to requests of owners, tasks of organisers and interests of performers. Staff planning based only on the volume of work to be performed does not allow digitalisation and social cybernation of an individual performer.The syntagmatic component of such an algorithm is the monthly total worked time, which is determined by the actual engagement of each performer. The paradigmatic component of such models should be the same daily number of performers. The stage of preliminary assessment of application of the proposed algorithm for digitalisation and social cybernation of workforce planning supposed an increase in labour productivity, approximately by 20–25 %, an increase in quality of work and a more effective assessment of activities of each performer.

Нuman right to virtual reality in the healthcare: legal issues and enforcement problems

A key feature of modern legal relations in the healthcare sector is the widespread use of digital technologies. This study describes certain aspects of the legal regulation of the human right to virtual reality in the healthcare sector and the problems of law enforcement. The methodology of this work is based on an interdisciplinary approach using comparative legal, dialectical and systemic methods. The main objective of this article is to determine the forms and directions of the use of virtual reality in health care in the context of human rights. It is emphasized that the introduction of smart technologies, virtual reality in the healthcare sector is the main modern trend in the development of healthcare in order to improve the provision of healthcare services. The human right to use virtual reality in healthcare is to ensure the actions of virtual reality users within the framework of virtual information relations in the healthcare sector, which are governed by the relevant legal norms. The human right to use virtual reality in healthcare is a fourth generation of human rights. These rights include all rights that have arisen as a result of scientific progress, the development of morality, namely "somatic rights", as well as information rights. The use of virtual reality in the healthcare sector is possible in the following areas, namely: (1) medical training, (2) surgical modeling, (3) rehabilitation, (4) psychotherapy and psychology, (5) ophthalmology, (6) telemedicine, etc. It is stated that user safety, privacy, freedom of expression, ethics and copyright protection in the use of virtual reality in healthcare require legislative regulation, taking into account the European experience. The virtual space in the healthcare sector provides opportunities for the realization of human rights and freedoms regarding the preservation of their health, but can be used to carry out actions that contradict the norms of law and have illegal behavior. The latter requires an improvement in the regulatory framework when using the virtual space of the healthcare sector to protect the interests of the individual, society and the state using international standards.

Fleroff goes digital: georeferenced records from "Flora des Gouvernements Wladimir" (Fleroff, 1902)

Global Biodiversity Information Facility (GBIF) has uneven data coverage across taxonomic, spatial and temporal dimensions. Temporal imbalances in the data coverage are particularly dramatic. Thus, 188.3M GBIF records were made in 2020, more than the whole lot of the currently available pre-1986 electronic data. This underscores the importance of reliable and precise biodiversity spatial data collected in early times. Biological collections certainly play a key role in our knowledge of biodiversity in the past. However, digitisation of historical literature is underway, being a modern trend in biodiversity data mining. The grid dataset for the flora of Vladimir Oblast, Russia, includes many historical records borrowed from the "Flora des Gouvernements Wladimir" by Alexander F. Fleroff (also known as Flerov or Flerow). Intensive study of Fleroff's collections and field surveys exactly in the same localities where he worked, showed that the quality of his data is superb. Species lists collected across hundreds of localities form a unique source of reliable information on the floristic diversity of Vladimir Oblast and adjacent areas for the period from 1894 to 1901. Since the grid dataset holds generalised data, we made precise georeferencing of Fleroff's literature records and published them in the form of a GBIF-mediated dataset. A dataset, based on "Flora des Gouvernements Wladimir. I. Pflanzengeographische Beschreibung des Gouvernements Wladimir" by Fleroff (1902), includes 8,889 records of 654 taxa (mainly species) from 366 localities. The majority of records originate from Vladimir Oblast (4,611 records of 534 taxa from 195 localities) and Yaroslavl Oblast (2,013 records of 409 taxa from 66 localities), but also from Nizhny Novgorod Oblast (942 records), Ivanovo Oblast (667 records) and Moscow Oblast (656 records). The leading second-level administrative units by the number of records are Pereslavsky District (2,013 records), Aleksandrovsky District (1,318 records) and Sergievo-Posadsky District (599 records). Georeferencing was carried out, based on the expert knowledge of the area, analysis of modern satellite images and old topographic maps. For 2,460 records, the georeferencing accuracy is 1,000 m or less (28%), whereas for 6,070 records it is 2,000 m or less (68%). The mean accuracy of records of the entire dataset is 2,447 m. That accuracy is unattainable for most herbarium collections of the late 19th century. Some localities of rare plants discovered by Fleroff and included into the dataset were completely lost in the 20th century due to either peat mining or development of urban areas.

Modern Trends in Personnel Management in the Civil Service: An Overview of Innovative Practices and Features of Administrative and Legal Regulation

<p>The COVID-19 pandemic has significantly affected all spheres of social-political life of the world community. As a result, there have been serious changes in the labour market, including the civil service. The labour market for civil servants is becoming increasingly complex, and new flexible technological solutions necessitate civil servants’ constant readiness for changes and lifelong learning. After all, the attribute of the new time is the quick-speed changes (we live in the mode “from slow to fast and faster”), both in terms of the amount of changes and in terms of the speed of their appearance. In such conditions, the civil service needs highly professional managers who are able to work to achieve expected results, apply European standards of public administration and develop effective public policy. Therefore, the purpose of the article is to substantiate the theoretical and methodological and applied aspects of personnel management in the civil service, taking into account the progressive innovative world human resources practices and features of administrative and legal regulation in this area. The authors proved the feasibility and identified the features of the formation of the talent management system as a leading modern trend in the field of personnel management in the civil service, examined the development of a talent management system in the civil service with an applied innovative tool such as e-learning in the conditions of modern challenges, and reviewed the positive international practice of talent management in the civil service (on the example of the USA, Germany, France, Great Britain, Singapore and Japan). On this basis, the main trends in the formation of the talent management system in the civil service of Ukraine are identified and the specifics of its administrative and legal regulation are analyzed.</p>