bluuebunny/crossref_metadata_2025 huggingface dataset:
The Relationship Between Entrepreneurship and Digitalization - Spotlight on the EU Countries
Authors: Andreea Bogoslov Ioana , Elena Lungu Anca
Published: April 2021

In the current context of the modern world, economies depend on a dynamic innovative environment, the innovation actually representing one of the main facilitators of change. The economic growth has certainly led to an exponential increase with respect to the interaction between innovation and entrepreneurship. Undoubtedly, innovation depends on the entrepreneurial context and mostly on the cooperation between the market process’ level actors. In order to implement the innovation in the entrepreneurial activities, there is a sine qua non condition of having the abilities to contribute as a promoter on spreading and adoption of innovation. The current innovations are, in certain situations, capitalized and they can be oriented towards gaining profit. The disparities in terms of development and the favourable evolution of the business environment are determined by multiple factors, at present the implementation of technologies representing one of them. The correlation between technology and economy exists and the effects it produces on the market reality are showcased in this article. Therefore, the purpose of the current research is to identify the correlations between the economic development and technologies adoption in the entrepreneurial field. For this purpose, quantitative methods have been used in order to strengthen the obtained results.
Interplays Between Corporate Reputation And Media – A Bibliometric Analysis
Authors: Leila Lunguleac-Bardasuc , Camelia Budac , Claudia Ogrean
Published: April 2021

As strategic asset – determinant of sustained competitiveness – corporate/firm reputation has a very distinctive feature that sets it apart: although reflection of (better, worse or not at all performed) reputation management at a company’s level, it is rather a “representation” / “perception” – built on a business’s previous behaviors, but more precisely on the ways its different stakeholders have interacted (acknowledged, internalized, resonated) with them – in a (sometimes unconscious) process highly mediated and moderated by the media. Thus, the current study aims to explore the interplays between corporate/firm reputation and media as they are reflected in the scientific literature – through a bibliometric analysis of the WoS Core Collection database records (between 1992 and 2019), using the VOSviewer tool. With its emphasis on corporate/firm reputation and media, the paper shapes the broad theoretical backgrounds in anticipation of future research and empirical results to be revealed on a much more focused and applied/practical area, namely the reputation of the media in Romania.
The Challenges of Reforming the International Monetary System in the Post COVID-19 World
Authors: Cristina Mărginean Silvia , Ramona Orăştean
Published: April 2021

The paper analyzes if the international monetary system calls for reform and whether China and the renminbi will play a decisive role in the post COVID-19 world. It also evaluates the main scenarios and trends that is being discussed since the global crisis – selecting the relevant authors, journals, institutions and opinions – examines present conditions and tries to extrapolate into future trends. Opting for a nontechnical approach, the article could be a good insight into the international monetary system, for academics, non-experts and policy makers. The paper concludes that if the 2008 crisis has induced the growth of the China role in the international monetary governance and the increase of the renminbi internationalization, the COVID-19 pandemic and post crisis reconstruction could generate a deeper reform of the international monetary system, in which the Chinese currency will strengthen its global position alongside the US dollar and the euro.
The Triple Layered Business Model Canvas Meets the Beekeeping Sector. General and Particular Considerations from the Romanian Industry
Authors: Diana Panţa Nancy
Published: April 2021

Today, sustainability has been clearly recognized as a necessity at global level by many, and the role of the business environment as a contributor in ensuring sustainability has become more and more acknowledged lately. Several efforts undertaken in this direction were focused on obtaining higher life quality levels and long-term benefits through businesses’ actions. Exploring and understanding agri-businesses from a managerial perspective becomes necessary due to sector’s particularities, but also to the fact that they are generally small enterprises, deeply embedded into their local communities. Beekeeping, as an agricultural branch, has indispensable contributions at societal and environmental level through a number of activities related to food and medicinal product supply and pollination. Sector’s dynamic, however, demonstrates that businesses are facing a series of challenges, and therefore, they need to showcase a proactive managerial approach in order to respond to risks and opportunities given by sustainability. Consequently, this paper looks to obtain a better understanding of sustainability management in the beekeeping sector by applying the triple layered business model canvas and featuring a series of facts from the Romanian industry.
COVID-19 Crisis - A Test for European Union’s Solidarity
Authors: Elena Popa Cristina
Published: April 2021

The crises the European Union has gone through over time have called into question the Union’s legitimacy and efficiency. The 2008-2009 financial crisis, the European debt crisis, the migration crisis and Brexit, have all tested the solidarity between member states. The COVID-19 pandemic is without a doubt the most drastic crisis in the EU’s history, with very severe socioeconomic consequences. The EU leaders were strongly criticized for not reacting quickly and efficiently enough to mitigate the impact of the virus, reduce suffering, and ward off the economic crisis. In this context, the questions that arise are: Is the Union a modern-day Titanic? Will it sink or it will sustain its legitimacy and come out stronger and more united from this unprecedented challenge?
The Impact of Climate Change on Income Inequality. Evidence from European Union Countries
Authors: Ada-Cristina Albu , Lucian-Liviu Albu
Published: April 2021

We will investigate in this paper the relation between income inequality and climate change, taking into account that the increase of carbon emissions has among consequences the increase of inequalities. The most vulnerable to climate change are the poorest and less developed countries. Climate change represents an important challenge for EU policymakers and the transition to zerocarbon emissions will lead to greater social inclusion and convergence among EU countries. We use in this paper two-stage OLS in order to analyse the relationship between income inequality and carbon emissions in case of EU countries.. We apply our model to two groups of European Union countries, the old member states - EU15 and new member states - EU13. Our results confirm that there are important differences between the two groups regarding the relationship between climate change and income inequalities. Therefore, policies implemented at EU level are extremely important in order to mitigate the adverse effects of climate change on growing inequality and poverty in EU countries. Governments must invest in new technologies, industries and innovation in order to address the complex challenge posed by mitigating climate change.
Ergonomics of Human Choice
Authors: Camelia Ghiurca
Published: April 2021

More than 100 years ago, Herbert A. Simon wrote the book “The sciences of the artificial” (1916) where he presented Economics as an artificial science. Even though back then the mainstream economics promoted the idea of , Simon’s perspective of man was as one of an artificial system, characterized by a bounded rationality whose behavior depends on his inner and outer environment. Later, in the 70’s Daniel Kahneman and Amos Tversky investigated more on the limitation of human rationality and built, based on empirical studies, the maps of bounded rationality. Later, Richard H. Thaler introduced the concept of nudge, as a way to improve people’s choices by using the knowledge about their limited rationality and using it to direct their behavior in the direction in which they would have behaved if they were rational.

This articles treats human behavior through the lens of ergonomics, a scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data and methods to design in order to optimize human well-being and overall system performance. We adopt the perspective of the man as an interface between his inner and outer environment and describe how behavioral economics developed a different perspective about human choice in contrast with the one promoted by standard economics.
Financial Literacy in Romania: A Test of Economics and Business Students
Authors: Alexandra Horobeţ , Georgiana Vrînceanu , Gheorghe Hurduzeu , Radu Lupu
Published: April 2021

Romania is in a rather dishonorable position from the financial literacy perspective in the European Union, ranking last among countries. To increase the level of financial education of the Romanian population, public and private institutions, organizations, and companies have recently taken the initiative in this field, mostly after 2015. Our contribution builds on these recent developments and aims at testing the level of basic financial literacy of Romanian university students, enrolled in business and economics studies, using the OECD Financial literacy test. Data was collected through an online survey on a voluntary basis, and the responses were analyzed using statistical indicators. Results indicate a rather high level of financial literacy among students, but also significant differences among respondents that may be explained by several demographic characteristics and specific attributes. The most important characteristics that influence the degree of financial literacy of students are age, students’ cycle of studies, the way the students live, property ownership and students’ involvement in financial market transactions and contracts. We stress towards the need to act through concrete measures to improve young people financial literacy, as a necessary condition to navigate in an increasingly complex environment, where finance plays an essential role.
Gender Matters for the Entrepreneurial Activity: Case of European States
Authors: Ganna Kharlamova , Andriy Stavytskyy , Mariia Naumova
Published: April 2021

The gender inequality is the hot topic for most countries in the world. However, sometimes the talks about the risks and threats are more dramatic than the reality is. The paper aims to test the gender gap in the selected states and to consider the hypothesis that gender matters in entrepreneurial activity. The methodology of the regression and statistical analyses is proposed to access the main hypothesis and to trace the dynamics of the gender indexes and ranks. The preliminary results show that gender affects the level of entrepreneurial activity; besides government support programs and socio-cultural factors have a significant impact as well. The valid results for all states represented positive correlation and dependence between Entrepreneurial Motivation for TEA and Female/Male ratio for all analysed states. We can conclude that the change in the ratio of women and men engaged in entrepreneurial activity in the state (i.e. Poland) will affect the level of business innovation. For example, when the gender structure of entrepreneurs in Poland changes towards the number of women compared to men, the level of innovation of products and services will increase, or vice versa.
The Effect of Glaucoma on the Quality of Patient’s Life
Authors: Marceta Elizabeta , Todorovic Dusan
Published: April 2021

Glaucoma is a chronic, progressive opticopathy with morphological optic disc changes and visual field disturbances. Visual field disturbances change the patient’s life habits. Medical as well as surgical treatments also disturb patients` activities of daily living. According to this, glaucoma is the disease which affects quality of patient’s life (QQL). Visual field (VF) evaluation is very important in glaucoma disease diagnostic process. Location of the VF defects also have an impact on the QOL. Patient`s daily activities, such as walking, low light condition adaptation, peripheral seeing of the objects, can be affected by glaucoma progression and with VF defects. All social, religious, cultural and traveling events are more difficult for the severe glaucomatous patients (MD<-12dB) in comparison with mild glaucomatous, defined as patients with MD > −6 dB. Every day usage of the local antuglaucomatous therapy disturbs patients’ QOL. The side effects of the eye drops can produce burning sensation, bronchospasm, bradycardia, increased iris pigmentation, increased eyelash length. Also, locally applied therapy provokes ocular surface disease. Benzalkonium chloride provokes destruction of the epithelial cells junction with development of the epitheliopathy and ocular surface disease. Surgically treated glaucoma patients can have disturbed QOL due to ocular surface disease symptoms (foreign body sensation, eye pain, redness, and increased tearing). These symptoms are caused by trabeculectomy and they are correlated with filtering bleb existence.To achieve QOL of the glaucomatous patients, different founded instruments are used. They are classified in: general health, vision specific, and glaucoma specific.
Phronetic Ethics in Social Robotics: A New Approach to Building Ethical Robots
Authors: Polak Paweł , Krzanowski Roman
Published: April 2021

Social robotics are autonomous robots or Artificial Moral Agents (AMA), that will interact respect and embody human ethical values. However, the conceptual and practical problems of building such systems have not yet been resolved, playing a role of significant challenge for computational modeling. It seems that the lack of success in constructing robots, ceteris paribus, is due to the conceptual and algorithmic limitations of the current design of ethical robots. This paper proposes a new approach for developing ethical capacities in robotic systems, one based on the concept of Aristotelian phronesis. Phronesis in principle reflexes closer human ethics than the ethical paradigms we employ today in ethical robotics. This paper describes the essential features of phronesis and proposes a high-level architecture for implementing phronetic principles in autonomous robots. Phronetic robotics is in its early stages of conceptualization, so many of the presented ideas are speculative and require further research.2
Species and Thallus Structure Diversity of Chlorophyta in Shore Platform of Dwarka (Gujarat Coast, India)
Authors: Sanghvi Dimpal , Chaudhury Nandini Ray , Jain Bhanukumar
Published: April 2021

Present study shows the species and thallus structure diversity of Chlorophyta in shore platform of Dwarka, Gujarat Coast. Chlorophyta were surveyed based on systematic random sampling for two years: April 2013 to April 2015. Total 27 species of Chlorophyta were identified through intensive fieldwork survey based on line transect and quadrate based methods. This study identifies four orders, nine families, 13 genera and 27 species among the green macroalgae population inhabiting the rock shore platform of Dwarka. Total 27 species of Chlorophyta have been found with major nine thallus types and 19 sub types of thallus structure. Ramiform and filamentous types of thallus structure are most common in this study.
The Fish Fauna of the Zarineh River (Urmia Lake Basin) Downstream Sector – Conservation and Management
Authors: Radkhah Ali Reza , Eagderi Soheil , Shams Yahia
Published: April 2021

This study aimed to investigate the fish fauna in the downstream sector of the Zarineh River, Urmia Lake basin. Seven stations were sampled along the Zarineh River before and after Shahin-Dezh City to help gain a better understanding of human activities on its fish fauna. The results revealed 11 fish species, which belong to three families, including Cyprinidae, Nemacheilidae and Gobiidae. Nine of them were Cyprinidae. Out of 11 species, five species, Carassius gibelio, Rhodeus amarus, Pseudorasbora parva, Hemiculter leucisculus and Rhinogobius lindbergii were exotic that were unintentionally introduced to the Zarineh River along with Asian carps. The threats to fish fauna are categorized into two categories: natural and anthropogenic. According to the observations, anthropogenic activities such as overfishing, pollutions, sand and gravel extraction, dam construction and introduction of exotic fish species were among the main threats for the ichthyofauna of the Zarineh River.
Bioindication of Water Quality of the Xinlicheng Reservoir by Algal Communities
Authors: Barinova Sophia , Liu Na , Ding Jiyang , An Yonglei , Qin Xueming , Wu Chenxin
Published: April 2021

The ecological analysis of 31 algae and cyanobacteria indicators assessed the water quality of the Changchun drinking water Xinlicheng Reservoir by using bio-indication methods. The water was fresh, low alkaline, low-saline, middle oxygenated, with reached nutrients and organic pollution and mesotrophic to eutrophic. Statistics reveal significant variables that impacted algal diversity were nutrients, water quality was low to the middle polluted Class II-III. The indices of saprobity and WESI show the high self-purification capacity and low-toxicity impact. We revealed potential threatening species of cyanobacteria. The improving water quality from 2007 up to now has been revealed.
Investigation on the Global Distribution of Invasive Fish Species, Convict Cichlid Amatitlania Nigrofasciata (Perciformes, Cichlidae) Over the Past Years with Emphasis on Iranian Inland Waters
Authors: Radkhah Ali Reza , Eagderi Soheil
Published: April 2021

The aim of this study was to investigate the global distribution of a non-indigenous and invasive fish species, the convict cichlid Amatitlania nigrofasciata, over time, with an emphasis on the inland waters of Iran. The results showed that the distribution range of the convict cichlid was initially based in Central America. Then, the distribution range of this species expanded to parts of North America. Finally, this fish species was introduced to other parts of the world such as Australia, Israel, Italy, Colombia, Germany, Peru, Slovakia, Japan, Indonesia, the Philippines, and Iran due to its extensive ability to spread. So far the presence of A. nigrofasciata has been reported in two domestic basins in Iran, namely Hormuz and Namak Lake. This study indicated that the distribution range of this species is not currently wide, but it is likely to expand towards the central plateau and southern parts of Iran.
Features of Formation and Use of Production Resources by Small Farms in Ukraine
Authors: Varchenko Olga Myronivna , Tkachenko Kateryna Vitalyivna , Byba Valentyna Anatolyivna , Svynous Nadiia Ivanivna
Published: April 2021

It is proved that the effective development of small farms is ensured by the level of their resource supply and the balance of production resources, the efficiency of which we have been carried out on the basis of the calculation of allocative and technical efficiency. According to the obtained equation of production function, we conclude that the most elastic factor is the cost of seeds, fertilizers, feed and other material costs. An increase of this resource by 1% will lead to an increase in the result by 0.395%. The smallest value of the coefficient of elasticity was obtained from such production resource as arable land. The obtained model shows that there is a decreasing effect on the scale, since the sum of the regression coefficients is less than 1 (equal to 0.962), which means that if the resources increase in some proportion, then the volumes of revenue increase in a smaller proportion. It is substantiated that allocative inefficiency is caused not by the excessive use of resources in small farms, but by the higher prices for them and the underestimated agricultural output.
The Applicability of Political Business Cycle Theories in Transition Economies
Authors: Praščević Aleksandra
Published: April 2021

The paper focuses the applicability of political cycles theories in specific circumstances of economies in transition which are at the same time the new democracies. Economic and political transition in these countries change both people’s and politicians’ preferences, institutions and generate specific politically motivated misuse of economic policymaking. Theories of political cycles in macroeconomics have been developed since 1970s, when the fact that policymakers could use economic policy as an efficient tool for increasing their chances for reelection became obvious. In countries with parliamentary democracies, incentives of policymakers to influence election results could be opportunistically motivated (opportunistic models) or ideologically motivated (partisan models). On the other side, voters could be naïve or rational, with different economic outcomes, as argued in extensive political cycles literature. The paper studies specific political motives of politicians in transition economies which are faced, especially in first fazes of transition with weak institutional mechanism and rules, and naïve voters. Consequently, opportunistic motives dominate ideological ones. The paper also focuses how the development of the institutional environment, especially in the context of international integration, such as accession to the European Union, reflects on the political business cycles in these countries.
Textbook Review Cultural History of Russia. Praha: Univerzita Karlova, Pedagogická fakulta, 2020. 286 s
Authors: Konečný J. , Kamedina L. V.
Published: April 2021

This review examines the book Cultural History of Russia published in 2020 by the publishing house of Charles University, Prague. This inquiry into the main areas of interest in both past and contemporary history of Russia has long been expected not only by students, specialists in Russian studies and in cultural studies, but also by a broad audience of those is interested in Russian cultural history. The authors seek to arrange the book according to the conceptual model; this innovative approach aims at underlining such cultural concepts that are basic and constitutive of the modern Russian culture. For these ends, facts, achievements and problems of the Russian cultural history are interpreted. The authors introduce students and readers to modern Russia, endowed with centurieslong heritage, multinationalism, large territory, but also with cultural contradictions and clashes. The book resolves a hard issue of presenting the real amalgam of views of the Russians on such disputes, and pays special attention to the Russian mass media and Runet. Therefore, suggests the book, modern Russians are in search of cultural identity, which is proved by heated discussions. The nine chapters help readers to get rid of the usual stereotypes in the image of Russians, invites the public to reflect on the achievements and contradictions of the cultural history of Russia. Discussion questions and tasks are what helps students that would read the book engage with the Russian realities and with each other. What is also beneficial for the use of this book in classes is that it is written according to the standards allowing a non-native speaker who has an A2-B1 level of Russian to understand all the information efficiently. To adapt the book to the needs and mental realities of European students, it is published in both print and digital format — the latter includes extra video and audio tapes. In the context of integrating the students with the material the authors should also be given the credit. They entangle the history and culture of medieval, modern and 21th century Russia with European history and the global cultural space. Overall, the book serves as an example in both fields: the cultural research and the textbook initiating and enhancing lingual and cultural understanding of Russian realities. The publication will remain a landmark among the educational achievements not only of the Charles University, but also of the community of European scholars specializing in Russian studies.
Life and Death Ethoses in the Short Story The Mystery of Foreseen Death by Aleksandr Grin: Imaginative Apophatic Reality
Authors: Dudareva M. A. , Koltsova N. Z.
Published: April 2021

The paper is dedicated to the issue of the apophatic component of artistic culture associated with Thanatos that is developed in the literature oeuvre of Aleksandr Grin. Setting Grin’s short story The Mystery of Foreseen Death as the research object, this texts seeks to provide insight into the image of death and the examination of its spiritual and material manifestations that reflected the logocentric approach that was then popular among the Russian thinkers. To pursue this aim, the methodology of this study should allow identifying the ontological perspective of Grin’s story. Thus, the methodological foundations embrace the onto-hermeneutic approach to the analysis of literary work. In revealing the ontological dimension of the story much attention is paid to the ethos of life and death, the protagonist’s artistic imaginative experience of reality. In the story under study death is ambivalent: it is bodily, anthropological, as indicated by the repetitive image of neck on the execution block. At the same time, it is apophatic, as indicated by the darkened end of the story, the bewilderment of skeptical scientists that arose because of the main event of the story, namely the protagonist’s execution. In this regard, it appears to be effective to consider the anthroposophical thought of Rudolf Steiner that was absorbed by a large part of Russian intelligentsia at the beginning of the 20th century. This doctrine stresses the reflections on a person’s experience of death in reality. The imaginative aspect of anthroposophism was developed by Grin’s close friend, a neighbor in Crimean Cimmeria, Maximilian Voloshin, a disciple of the teachings of Steiner. The conclusions that can be drawn from the study are as follows: Grin’s story presents a detailed imaginative death experience, which makes it possible to raise the issue of it being part of the broader anthroposophical teaching. The Mystery of Foreseen Death indirectly expresses the Steinerian ideas and at the same time it fits into the framework of the Russian apophatic artistic tradition. The article also raises the issue of the apophatic component of Russian artistic culture, the thanatological experience of which can help in overcoming crisis situations nowadays. The findings of the research, in this way, can have an effect on better understanding in several fields: in literature studies (philology), in the history of Russian literature, in cultural studies and in philosophy.
SYNDROME OF EMOTIONAL BURNOUT AMONG MEDICAL PARAMEDICS OF THE EMERGENCY MEDICAL CENTER IN THE CITY OF VORONEZH
Authors: Struk Yu. V. , Bolotov Т. G. , Sergeeva V. R.
Published: April 2021

In this article, we have considered this concept as a syndrome of emotional (professional) burnout, namely the medical workers of middle level. Also cited the results of the study on the basis of the Voronezh center of medicine of accidents. Next was presented the prevention and treatment of syndrome of professional burnout and the complex of psycho- corrective activities.
INTRAOSSEUS ACCESS BY AMBULANCE
Authors: Davydov V. V. , Tretyakova E. M.
Published: April 2021

Background. Emergency physicians often have difficulty providing vascular access to patients in critical condition. In these conditions, intraosseous access has an advantage over traditional peripheral vein catheterization. Currently, intraosseous access is not widely used at the stage of emergency medical care.

Aim. Analysis and generalization of current information on the use of the method of intraosseous access to emergency medicine.

Materials and methods. We have found publications in Russian and international search engines (PubMed, eLIBRARY, etc.) over the past 20 years. Publications reflected current issues of intraosseous access application. 74 articles were found and 30 were selected for review.

Results. Intraosseous access showed good results in patients with weakly expressed venous network at the stage of emergency medical care. The method has a simple technique of manipulation, does not have a large number of complications and contraindications. Doctors who have received training often use intraosseous access, taking into account the indications for use.

Conclusion. Intraosseous access has an advantage over peripheral intravenous access in patients in critical condition at the stages of emergency care.
The preparative synthetic approach to 4-(triﬂuoromethoxy)piperidine and 4-(triﬂuoromethoxymethyl)piperidine
Authors: Logvinenko Ivan G. , Dolovanyuk Violetta G. , Kondratov Ivan S.
Published: April 2021

Aim. To develop a convenient synthetic approach for the preparation of multigram amounts of 4-(triﬂuoromethoxy)-piperidine and 4-(triﬂuoromethoxymethyl)piperidine – promising building blocks for medicinal chemistry.Results and discussion. 4-(Triﬂuoromethoxy)piperidine (8.4 g) and 4-(triﬂuoromethoxymethyl)piperidine (12.9 g) were synthesized in 5 stages starting from 4-hydroxypiperidine (the overall yield 40 %) and 4-(hydroxymethyl)piperidine (the overall yield 13.5 %), respectively.Experimental part. The first stage of the synthetic strategy was acylation of 4-hydroxypiperidine with benzoyl chloride. N-benzoyl-4-hydroxypiperidine obtained was transformed to N-benzoyl-4-(triﬂuoromethoxy)piperidine in two stages using the Hiyama method (the synthesis of the corresponding S-methyl xanthate with the subsequent desulfurization/ﬂuorination using N-bromosuccinimide and Olah’s reagent). Then the N-benzoyl group was reduced to benzyl one, which was removed using 1-chloroethyl chloroformate. The similar approach was applied to the synthesis of 4-(triﬂuoromethoxymethyl)piperidine starting from 4-(hydroxymethyl)piperidine. The structure and composition of the compounds synthesized were confrmed by 1Н, 13C and 19F NMR spectroscopy,mass-spectrometry and elemental analysis.Conclusions. The synthetic approach developed is a convenient method for the multigram preparation of4-(triﬂuoromethoxy)piperidine and 4-(triﬂuoromethoxymethyl)piperidine and can be used for the synthesis of other secondary amines containing the CF3O-group.Key words: ﬂuorination; triﬂuoromethoxy group; xanthate; piperidine; protection group
Convenient approaches to the synthesis of 6-amino- and 6-oxoimidazo[4,5-b]pyrazolo[3,4-e]pyridines
Authors: Yakovenko G. G. , Vovk M. V.
Published: April 2021

Aim. To develop convenient approaches to the synthesis of 6-amino- and 6-oxoimidazo[4,5-b]pyrazolo[3,4-e]pyridines as promising biologically active scaﬀolds.Results and discussion. It has been found that cyclocondensation of N-Boc-4-aminopyrazole-5-carbaldehydes with creatinine can be used as an eﬀective method for obtaining 6-aminoimidazo[4,5-b]pyrazolo[3,4-e]pyridines previously unknown. For the synthesis of their 6-oxoanalogs, the reaction of 5-aminopyrazolo[4,3-b]pyridine-6-carboxylic acids used in a modifed Curtius rearrangement with diphenylphosphorylazide was successful. This method was implemented through the stage of the intermediate aminoisocyanates formation.Experimental part. The reaction of N-Boc-4-aminopyrazole-5-carbaldehydes with creatinine in the presence of pyrrolidine as a catalyst in reﬂuxing acetic acid allowed to obtain 6-aminoimidazo[4,5-b]pirazolo[3,4-e]pyridines with the yields of 54 – 70 %. The structure of the compounds synthesized was proven by spectral measurements. In the 1H NMR spectra there were singlets of H-3 (7.63 – 7.88 ppm) and H-8 (7.87 – 8.26 ppm) protons, as well as broad singlets of the NH2 group in the range of 7.05 – 7.21 ppm. Heating of 5-aminopyrazolo[4,3-b]pyridine-6-carboxylic acids with triethylamine and diphenylphosphorylazide in dioxane for 6 hours gave 1-substituted imidazo[4,5-b]pyrazolo[3,4-е]pyridine-6(5Н)-ones with the yields of 67 – 80 %. The IR-spectra of the compounds synthesized were characterized by the absorption bands of the C=O (1705 – 1708 cm-1) and NH (3275 – 3281 cm-1) groups. 1H NMR-spectra were characterized by singlets of H-3 and H-8 protons in the intervals of 7.43 – 8.08 ppm and 7.92 – 8.32 ppm respectively, as well as by two broad singlets of NH-protons in the ranges of 10.90 – 11.12 ppm and 11.25 – 11.37 ppm.Conclusions. Eﬀective approaches to the synthesis of new promising heterocyclic systems of 6-amino- and6-oxoimidazo[4,5-b]pirazolo[3,4-e]pyridines have been developed. Cyclocondensations of N-Boc-4-aminopyrazole-5-carbaldehydes with creatinine and 5-aminopyrazolo[4,3-b]pyridine-6-carboxylic acids with diphenylphosphorylazide have been proven to be convenient ways to obtain these compounds with good yields.Key words: N-Boc-4-aminopyrazole-5-carbaldehyde; creatinine; 5-aminopyrazolo[4,3-b]pyridine-6-carboxylic acid; diphenylphosphorylazide; 6-amino(oxo)imidazo[4,5-b]pyrazolo[3,4-e]pyridines;cyclocondensation
The study of polyphenolic compounds of Pimpinella anisum herb and determination of their antioxidant activity
Authors: Umarov U. , Kolisnyk S. V. , Kolisnyk O. V. , Fatkhullaeva M. , Chinibekova N. K. , Khamdamov M. M.
Published: April 2021

Aim. To study the qualitative composition and quantitative content of the polyphenolic compounds in Pimpinella anisum herb and determine their antioxidant activity.Results and discussion. Among the polyphenolic compounds contained in anise herb, chlorogenic acid(4.409 mg/g) predominates. Signifcant amounts of catechins (3.104 mg/g), apigenin derivatives (3.077 mg/g) and luteolin (1.864 mg/g) also accumulate in the herb. Minor amounts of myricetin (0.105 mg/g) and naringenin (0.019 mg/g) derivatives, rutin (0.189 mg/g), quercetin (0.028 mg/g), apigenin (0.009 mg/g) and hesperetin (0.002 mg/g) are present. According to the research results, the antioxidant activity of polyphenolic compounds of anise herb with reference to ascorbic acid was found to be 67.76 ± 0.05 mmol/g. Rutin exhibited the antioxidant activity at the level of 3979.59 ± 0.08 mmol/g.Experimental part. Pimpinella anisum herb collected during the ﬂowering stage in the summer of 2019 inthe Kharkiv region (Ukraine) was used for analysis. The analysis of 70 % ethanolic extract from anise herb was performed by high performance liquid chromatography using a Prominence LC-20 Shimadzu chromatographic system (Japan) with a SPD-20AV spectrophotometric detector, an Agilent Technologies Microsorb-MV-150 column (reversedphase, C18 modifed silica gel, length – 150 mm, diameter – 4.6 mm, particles size – 5 μm). Identifcation of substances in the extract was carried out by comparing the retention time and the spectral characteristics of the test substances with the same characteristics of the reference standards. The antioxidant activity was determined by the potentiometric method (pH meter – Hanna 2550, with redox electrode EZDO PO50) with reference to ascorbic acid.Conclusions. The qualitative composition and quantitative content of polyphenolic compounds in the ethanolic extract of anise herb have been determined by high performance liquid chromatography. The total content of polyphenolic compounds is 17.576 mg/g. The antioxidant activity of polyphenolic compounds of anise herb with reference to ascorbic acid has been found to be 67.76 ± 0.05 mmol/g.Key words: polyphenolic compounds; anise; herb; high performance liquid chromatography; antioxidant activity
New carabid species and biogeografic considerations of the peripampasic arc
Authors: Roig-Juñent Sergio , Quiroga Carlos R.
Published: April 2021

Three new species of Carabidae (Coleoptera) inhabiting highland grasslands and Chaco Serrano, in San Luis and Córdoba provinces of Argentina, are described and illustrated based on morphological external and genital characters. They constitute endemic species of different mountain systems. Two species belong to the genus Baripus Dejean, (B. (Baripus) merloensis n. sp. and B. (Baripus) puntano n. sp.), and one to the genus Cnemalobus Guérin-Ménéville, C. gustavoi n. sp. The new species are included in updated keys to the species of subgenus Baripus and genus Cnemalobus, respectively. Distributional data and habitat description are also provided. Finally, a quantitative panbiogeographic track analysis was performed including the subgenus Baripus, the Cnemalobus striatus species group, and other arthropod taxa belonging to biogeographic elements of gondwanan age. The resulting generalized track suggests that the peripampasic arc has different South American biogeographic elements that might have occupied it in different times
Susceptibility of Periplaneta americana (Blattodea: Blattidae) to two isolates of Steinernema rarum (Rhabditida: Steinernematidae) of the province of Córdoba, Argentina
Authors: Aguirre Varela Ailín D. A. , Bertolotti María A. , Cagnolo Susana R.
Published: April 2021

The effect of Steinernema rarum (Doucet) ((OLI) and N105 strains) from Córdoba province on the American cockroach Periplaneta americana (L.) was evaluated. Two doses: 3,200 and 6,400 infective juveniles (IJs) / host were used and a control group was considered. Forty-nine insects per treatment were evaluated. Infections were maintained at 25 ± 1 ºC. Dead insects were recorded every 24 h during 15 days. Steinernema rarum (OLI) caused a mortality of 67% and 89%, for 3,200 and 6,400 JIs, respectively. With isolate N105, mortality never exceeded 65%. The two isolates completed their life cycle with the production and emergence of JIs in P. americana: for S. rarum (OLI), 255,215 ± 3 x 104 and 328,102 ± 3 x 104, for D3200 and D6400, respectively; for S. rarum N105, 142,451 ± 3 x 104 and 188,253 ± 3 x 104, D3200 and D6400, respectively. Significant differences between strains for the average number of JIs (F3,126 = 5,26; p ≤ 0,001) were registered. Based on these results, Blattodea is incorporated into the range of hosts of S. rarum (OLI) and it is disclosed that P. americana is the first host for S. rarum N105 in laboratory
How personal factors grow students' interest in entrepreneurship
Authors: Saputra Arief Dwi , Rahmatia Alfina , Muslimah Muslimah
Published: April 2021

This study investigates how personal factors can influence entrepreneurship's interest in terms of cognitive variables with indicators of skills and knowledge, affective variables with indicators of attitude and value, and conative variables with indicators of behavior and experience. This study uses a quantitative strategy through a sample of 338 informants. The root of the problem is reviewed from the literature review and strengthened by data collection from the online interview process. Based on these results, personal factors through related variables and indicators can be used as a research agenda to answer corporate contributions problems that offer answers related to reasons for entrepreneurship. The implication is aimed as a strategy to foster student interest in entrepreneurship by showing a close relationship that is mutually supportive and relevant from contributing to each variable related to personal factors. This study also provides a scientific contribution in the form of knowledge about an entrepreneurial interest created from personal factors.
The impact of culinary tourism on tourist satisfaction and destination loyalty: Padang city, West Sumatra context
Authors: Fitrizal Fitrizal , Elfiswandi Elfiswandi , Sanjaya Sigit
Published: April 2021

The objective of this study to identify the impact of culinary tourism on tourist satisfaction and destination loyalty. Respondents in this study are the tourists in Padang city, West Sumatra. The study utilized primary data which is obtained through the questionnaire. The respondents were selected by convenience sampling method. The number of respondents is 384 determined by using Lemeshow formula. Data were analyzed by Path Analysis. The result show that culinary tourism has a positive and significant effect both on destination loyalty and tourist satisfaction. Tourist satisfaction has a positive and significant effect on destination loyalty. Culinary tourism is one of the effective tools to increase tourism. Tourist satisfaction will be achieved with components of culinary tourism. Tourist satisfaction even though insufficient category, it will be able to increase loyalty.
PRIVATIZATION OF SOLID WASTE MANAGEMENT: OPPORTUNITIES AND CHALLENGES
Authors: Bah Yahya Muhammed , Artaria Myrtati Dyah
Published: April 2021

Aim: The fundamental rationale for a systematic literature review is to examine opportunities and challenges in the privatization of solid waste management, and share knowledge to spark and inspire a process that will usher in public private partnership to ensure cities are kept clean for habitability. Methodology and Results: A systematic review of the literature using information obtained from different sources was performed. The Google Search Engine was used to search for these articles. During the search numerous combinations of words and phrases were used to ensure articles reflect the most recent knowledge and scholarly works. Only peer-reviewed articles published after 2000 were selected, except extracts perceived to be of fundamental mileage to the study. However, articles published by staunch international organizations working in privatization of solid waste management for years which had produced indefatigable knowledge in the field were stealthily appraised. The privatization of solid waste management has resulted in some successes which include, but not restricted to: effectiveness, cost saving, timely service delivery, access to funding and expansion, quality services, partnership and community participation, cleanliness and healthy environment, jobs creation and better income, elimination of public monopoly and promotion of competition, new technologies and innovative techniques, public sector concentration on supervision, resources conservation and protection from risks; less bureaucracy and prompt action regarding concerns and complaints. Conclusion, significance and impact of study: With a well-thought model and proper public supervision, the privatization of solid of waste management can deliver habitable cities, though not without negative impacts and obstacles.
Investigation of performance properties of rubber with metal fillers
Authors:   Omsk State Technical University, Pashukevich S. V.
Published: April 2021

The work conducts laboratory tests on the rubber of the first group of GOST 8752-70 with the introduction of the metal components. The filler is introduced into the rubber mixture on laboratory rollers. Fine powders of copper (Cu), tin (Sn) and lead (Pb) are used as fillers. The dependences of the temperature in the contact zone of the sample and the body of revolution on the concentration of the filler and the dependence of wear on the concentration of the filler for the same loads and sliding speeds are obtained, the fillers that give the rubber the greatest wear resistance are revealed, and the rational amount of the filler is determined. The positive results of laboratory tests give grounds to recommend various equipment including aerospace equipment for use in sealing devices of hydraulic systems, rubber products with metal fillers in the indicated concentrations, which will extend their service life and increase their reliability
Improving the quality of design calculations of viscous flow in low-flow centrifugal compressor stages by methods of computational fluid dynamics through reasonable application of different turbulence models
Authors:   Peter the Great St. Petersburg Polytechnic University, Kartashev S. V. , Kozhukhov Yu. V. ,   Peter the Great St. Petersburg Polytechnic University
Published: April 2021

The paper considers the issue of improving the quality of the numerical experiment in the calculation of viscous gas in the flowing part of a low-flow centrifugal compressor stage. The choice of turbulence model in creating a calculation model for calculations by methods of computational fluid dynamics is substantiated. As object of research is chosen low-flow stage with conditional flow coefficient Ф=0,008 and relative width at impeller outlet b2 /D2 =0,0133. The issue of qualitative modeling of friction losses in low-flow stages is of fundamental importance and is directly related to the choice of turbulence model. It is shown that the choice of low-Reynolds turbulence models in the case of unloaded and discontinuous low-flow stages can be made from the main common models (SpalartAllmaras, SST, k-ω) based on the economy of calculations, speed of convergence, solution stability and adequacy of the obtained results. For models with wall functions, the quality of the mesh model and the observance of the dimensionless distance to the wall y+ throughout the calculation domain are particularly important. For highReynolds turbulence models, at values of y+=25...50 on all friction surfaces of the computational domain in the optimal mode of operation, the grid independence of the solution for the entire gas-dynamic characteristic is ensured. It is unacceptable for y+ to fall into the transition region of 4...15 between the viscous sublayer and the region of the logarithmic velocity profile
The overcurrent protection characteristics testing digital substation intelligent electric devices
Authors:   Omsk State Transport University, Simakov A. V. , Kharlamov V. V. ,   Omsk State Transport University, Skorokhodov V. I. ,   Omsk State Technical University
Published: April 2021

The electric power industry digital transformation features and the intelligent electronic devices (IEDs) introduction in the low-voltage circuits of power stations and substations are considered. The analysis of normative documents and standards is carried out. The features of scheduled maintenance of relay protection and automation devices are determined, the possibilities and prospects of organizing condition-based maintenance are considered. The mandatory steps required for any type of maintenance are defined. A method for checking the electrical and time characteristics of the overcurrent protection of an intelligent electronic device is proposed. The device is designed in accordance with the IEC-61850 standard and operates in the local area network of a digital substation of architecture III
Prevalência de queixas osteomusculares e fadiga em docentes de uma universidade em Santarém - Pará
Authors: Alves Adenilza Lima , De Jesus Camila Guimarães , Pereira Erica Caroline Azevedo , Dos Santos Melina Laíse Nascimento
Published: April 2021

Objetivo: Analisar a prevalência de queixas osteomusculares e fadiga em docentes de uma universidade na cidade de Santarém-Pará. Métodos: Realizou-se uma pesquisa observacional, quantitativa, qualitativa, descritiva e transversal, a qual utilizou como instrumentos de coleta de dados o Questionário Nórdico de Sintomas Osteomusculares (QNSO), a Escala de Fadiga de Chalder (CFQ-11) e um Questionário Sociodemográfico. A amostra foi composta por trinta e um (n=31) docentes, (n=12 do sexo masculino e n=19 do feminino), de uma Instituição de Ensino Superior (IES). Resultados: Houve prevalência de 93,55% de queixas osteomusculares para região lombar e 77,42% para as regiões de pescoço/cervical e dorsal nos últimos 12 meses. Nos últimos 7 dias, a prevalência de sintomas foi de 96,77% dentre os participantes, com 22,58% para região lombar. Dentre os impedidos de realizar suas atividades normais, 70,97% queixam-se de desconfortos lombares. Em relação ao CFQ-11, três participantes (9,67%) apresentaram quadro de fadiga geral. Quanto à fadiga física, 35,48% (n=11) da amostra pontuaram valores de 4 à 6 pontos e 3,22% (n=1) apresentaram sintomas de fadiga mental. Conclusão: Elevada prevalência de queixas osteomusculares nos últimos 7 dias. Sintomatologia dolorosa predominante sobre região lombar. Observa-se baixo índice de fadiga mental e física entre os participantes do estudo.