bluuebunny/crossref_metadata_2025 huggingface dataset:
Efeito da idade, sortimento e tempo de estocagem na densidade verde da madeira de Pinus taeda L.
Authors: Bonazza Marcelo , Sampietro Jean Alberto , Vivian Magnos Alan , Silvestre Raul , Modes Karina Soares
Published: June 2022

O conhecimento da densidade verde é fundamental no processo de comercialização e abastecimento industrial, possibilitando a conversão entre unidades de volume e massa da madeira. Dessa forma, o objetivo deste estudo foi avaliar a influência da idade da madeira, sortimentos e tempo de estocagem sobre a variação da densidade verde de toras de Pinus taeda L. Para isso, foram estudadas toras com diâmetros na ponta fina entre 8-18 cm (S1) e 18-24 cm (S2), com idade de 9 anos. Além desses dois sortimentos (S1 e S2), outros dois também foram analisados para toras com 21 anos de idade, 24-35 cm (S3) e acima de 35 cm (S4). A densidade verde da madeira foi determinada por meio da cubagem rigorosa e pesagem das toras no momento da colheita das árvores e em outras seis ocasiões, aos 7, 14, 21, 28, 60 e 90 dias de estocagem a campo. O efeito dos fatores idade, sortimento e tempo de estocagem foram verificados pelo modelo linear geral (p<0,05). Posteriormente, equações para estimativa da densidade verde foram ajustadas em função da densidade básica e diâmetro médio das toras. Os resultados demonstraram que todos os fatores considerados tiveram efeito significativo sobre a densidade verde da madeira. A madeira mais velha apresentou maiores valores para essa variável e, dentro de cada idade, a densidade verde da madeira aumentou à medida que o diâmetro das toras diminuiu. O tempo de estocagem exerceu influência apenas sobre a densidade verde dos S1 e S2 em ambas idades. As equações ajustadas mostraram resultados satisfatórios para a predição da densidade verde da madeira. Assim, conclui-se que os fatores estudados devem ser considerados em amostragens para a determinação da densidade verde da madeira e que é possível utilizar variáveis de fácil obtenção, como o diâmetro médio das toras, para a estimativa dessa variável com precisão satisfatória.
Predação de sementes de Aniba rosaeodora Ducke por meio de análise de imagens
Authors: Arispe Torrez Adrian Arturo , Imakawa Angela Maria , Blind Ariel Dotto , Sampaio Paulo de Tarso Barbosa
Published: June 2022

Aniba rosaeodora Ducke é uma espécie de alta relevância na indústria da perfumaria. A exploração excessiva, frutificação irregular e altos índices de predação de frutos, principalmente por insetos, situam a Aniba rosaeodora na lista de espécies ameaçadas de extinção. O objetivo deste estudo foi avaliar a eficiência da análise de imagens radiográficas em sementes predadas por Heilipus odoratus e a influência dos danos no processo de germinação e formação de plântulas. As sementes cotiledonares foram submetidas ao teste de raios X na intensidade de 35 kV por 10 segundos e a predação foi analisada por meio das imagens radiográficas com o software Imagej2®, estabelecendo-se as categorias: danos pequenos (≤ 25%); danos moderados (> 25% - ≤ 50%) e danos severos (> 50%). O teste de raios X permitiu detectar que sementes com orifícios não necessariamente estavam sendo predadas no seu interior. Apesar de perdas na reserva cotiledonar pela predação, as sementes ainda conseguem emitir raízes se o eixo embrionário não for atingido, porém, as possibilidades de emitir a parte aérea se reduzem drasticamente conforme o aumento dos danos. Concluiu-se que o teste de raios X foi eficiente para confirmar a predação sem afetar o processo de germinação e que a análise de imagens é uma ferramenta adequada para mensurar os danos provocados por Heilipus odoratus.
Structure, floristic composition and environmental relationships of natural regeneration in a semideciduous seasonal forest
Authors: Barreto Andrêssa Mota Rios , Gomes Lhoraynne Pereira , Kunz Sustanis Horn , Dias Henrique Machado , Abreu Karla Maria Pedra de
Published: June 2022

This paper aims to evaluate the floristic and structure of natural regeneration in a forest fragment located in the south of Espírito Santo State, as well as to verify the interaction between vegetation and environmental variables. The study was developed in Private Reserve of Nature Patrimony (RPPN) Cafundó, with twelve sample units (1 x 20m), where three classes based on size - Class 1 (plants between 0.1 and 1m high), Class 2 (plants between 1.1 and 3m high) and Class 3 (plants higher than 3m and less than 5cm DBH). This RPPN has a total area of 517ha, which approximately 358ha were used for allocation of experimental units. Individuals were classified according to ecological group and dispersion syndrome. Floristic diversity, equability, density and frequency of species were also calculated. Analysis of natural regeneration, floristic similarity between natural regeneration and the upper layer as well the regenerating layer interaction with environmental variables was performed through Canonical Correspondence Analysis. We found 678 individuals distributed in 73 morphospecies/species, with Actinostemon klotzschii and Goniorrhachis marginata being the most abundant. Sorensen's similarity between natural regeneration and the adult tree layer was 29%. The most dominant ecological groups were late secondary, while zoochory was the predominant dispersion syndrome among existing species. Shannon diversity index was 3.13 and equability 0.72. Goniorrhachis marginata, Actinostemon klotzschii and Psychotria carthagenensis species had correlation with carbon (C), phosphorus (P), declivity and canopy cover. We concluded that the natural regeneration component within studied area has a high richness and density of individuals when compared to studies developed in similar phytophysiognomies. The studied environmental variables seem to have little influence on the distribution of natural regeneration species in the RPPN, once only carbon, phosphorus, declivity and canopy cover have explained the species distribution within fragment.
Riqueza, diversidade e composição arbórea nas praças de Palmas, Tocantins
Authors: Pinheiro Renato Torres , Marcelino Dianes Gomes , Moura Dieyson Rodrigues de , Bittencourt Camila Rocha
Published: June 2022

Nos centros urbanos, o planejamento da arborização urbana é fundamental para garantir a qualidade de vida dos cidadãos, sendo que as praças são locais estratégicos para promover a interação entre as pessoas, conforto térmico e a conservação da biodiversidade urbana. Diferente de muitas cidades brasileiras, Palmas, capital do Tocantins, desde sua concepção buscou incorporar em seu planejamento urbanístico a delimitação de áreas verdes e praças com o objetivo de assegurar o conforto térmico, lazer e qualidade de vida à população. O presente estudo objetivou avaliar a arborização das praças das quadras urbanizadas do Plano Diretor de Palmas - TO, caracterizando e quantificando a arborização das praças implantadas em diferentes períodos e praças ainda sem infraestrutura, comparando a sua riqueza, diversidade e composição arbórea. Registrou-se a presença de 2.350 árvores de 35 famílias botânicas e 111 espécies nas praças de 12 quadras de Palmas - TO. As espécies nativas do Cerrado foram as mais frequentes em todos os tipos de praça. As análises de diversidade Alfa e Beta determinaram as praças não desmatadas como as mais diversas e dotadas de comunidades mais similares, padrões positivos que diferem dos descritos para a arborização da maioria das praças brasileiras, um modelo diferenciado que deve ser preservado e propagado pelo poder público local.
Entrepreneurs' strategic response to COVID-19 limitations: Ukrainian experience
Authors: Sahaidak Mykhailo , Prokhorova Yeliena , Sobolieva Tetiana
Published: June 2022

COVID-19 quarantine limitations and their effects on business lead to unpredictable environment changes, which require appropriate entrepreneurs' strategic response. COVID-19 quarantine limitations dramatically affected specialized businesses, which had to adopt for the new environment requirements. COVID19 especially influenced small and medium size entrepreneurs, which are specialized in one industry. Considering the peculiarities of integration and diversification as priority strategies for business development in the new reality, the article proves that specialization in goods or services in one industry for small and medium enterprises is risky and can lead to the bankruptcy of such businesses. Based on official statistics, the changes in Ukrainian small and medium companies' performance during years 2019-2020 were studied across industries. The gathered data provide evidence that companies which specialized in one industry or business activity suffered from the crisis most of all. According to the forecasts, COVID-19 will affect the economy over a number of years. That is why business has to adopt for the new reality. Using diversification strategies for small and medium size businesses is recommended in order to survive and grow.
Subsequent measurement of property, plant and equipment in hotel companies in the Republic of Serbia and the Republic of Croatia
Authors: Milašinović Marko , Obradović Vladimir , Karapavlović Nemanja
Published: June 2022

The aim of this paper is to consider the practice of subsequent measurement of property, plant and equipment in hotel companies in the Republic of Serbia and the Republic of Croatia, i.e., to determine whether the preparers of financial statements make greater use of the historical cost model or the model based on fair value. The sample consists of 220 hotel companies in the Republic of Serbia and the Republic of Croatia, observing their financial reports for 2019. The research reveals that most hotel companies in both countries subsequently measure owner-occupied property and plant and equipment according to the historical cost model. Hotel companies in Serbia most often apply the fair value model for subsequent measurement of investment property, while hotel companies in Croatia most often apply the historical cost model in the same context. We also find that a large number of hotel companies in the observed countries do not disclose the basis for subsequent measurement of property (including investment), plant and equipment in the notes to their financial statements, which means that the quality of financial reporting on those assets in the hotel companies should be improved.
Economic security of Bosnia and Herzegovina as part of the national security system
Authors: Rebić Mladen , Antić Vladimir
Published: June 2022

Due to the specifics of the political and economic system in Bosnia and Herzegovina (BiH), in the recent history of the country it has not been possible to approach the problem and challenges of economic security comprehensively and seriously. The given circumstances reinforce the need for research and analysis of economic security in BiH in order to show the real situation. This paper analyses economic security as a part of national security, with the help of relevant indicators, and then the connection of economic security with the economic development of BiH. Methods of analysis, synthesis, compilation, correlation and linear regression were applied for research purposes. The aim of the research is an empirical analysis of economic security indicators in terms of determining the degree of interconnection of key variables of economic security (public debt, availability of financial resources, technological progress, investment in fixed assets, unemployment, military investment, foreign exchange reserves, budget deficit, GDP growth rate, etc.) for the period from 2008 to 2018. The results of the research clearly reveal that economic and national security are mutually interrelated, and that economic security is a precondition for national security, which confirms the main hypothesis of this paper.
Economic challenges of entrepreneurs in the Republic of Serbia operating in the most prospective economic activities
Authors: Fedajev Aleksandra , Voza Danijela , Panić Marija , Veličković Milica
Published: June 2022

High unemployment rate, low level of economic activity and low living standards are some of the most significant problems that the Republic of Serbia has been facing in the last few years. The development of small and medium enterprises and entrepreneurs as great potential to solve these problems to some extent is still not sufficiently exploited. Keeping in mind the importance of the development of this economy segment, this paper analyses the business economy of entrepreneurs by economic activities in 2018 in the Republic of Serbia to determine the economic activities that have the greatest prospects for entrepreneurship development in the future. The ratio analysis of operations was used as a starting point for comparative analysis. It was conducted using the data obtained from the Annual Bulletin of Financial Statements published by the Business Registers Agency for ten economic activities where entrepreneurs reordered the highest profitability in 2018. Using the entropy method and PROMETHEE method, the ranking of entrepreneurs according to economic activities was performed. The obtained results indicated that in 2018, the best-ranked entrepreneurs were those operating in Professional, Scientific, Innovative and Technical Activities, while the worst-ranked are entrepreneurs operating in Accommodation and Food Services.
Analysis of efficiency factors of companies in Serbia based on artificial neural networks
Authors: Lukić Radojko
Published: June 2022

This paper investigates the influence of certain factors on the efficiency of companies in Serbia using artificial neural networks. According to the results of empirical research using artificial neural networks, the significance of some observed factors on the efficiency of companies in Serbia is as follows: net profit 55.5%, operating revenues 59.4%, operating assets 52.8%, capital 59.6 %, loss 100% and number of employees 51.3%. In order to improve the efficiency of companies in Serbia in the future, it is necessary, in the first place, to manage profits as efficiently as possible (i.e. to reduce losses as much as possible). This is also achieved with the most efficient management of sales, assets, capital and human resources (training, rewarding, job advancement, and flexible employment). Accelerated digitalization of the entire business certainly plays a significant role in that.
Effects of socio-demographic factors on leadership style in Serbian banking industry
Authors: Berber Nemanja , Strugar-Jelača Maja , Bjekić Radmila , Marić Slobodan
Published: June 2022

The main aim of this paper is to investigate the effects that gender, age, and educational level have on leadership styles, based on the Multifactor Leadership Questionnaire (MLQ) methodology. The sample used in the research comprises 140 managers from the banking sector in Serbia. The research was performed in 2019. The research methodology includes a literature review in the area of leadership and a statistical analysis of the data collected. The regression models were created to investigate the relations between leadership styles and demographic factors of age and educational level of managers. The results of the research pointed that there are positive statistically significant relations between the transformational and transactional leadership styles and level of education, while in the case of age, there are negative relations observed. The authors presented practical and theoretical implications and limitations of the study.
The nexus between FDI and external balance in selected Emerging European Economies: A panel data approach
Authors: Ercegovac Dajana , Beker-Pucar Emilija
Published: June 2022

This research focuses on the nexus between foreign direct investments (FDI) and external balance in selected Emerging European Economies (EEEs). Emerging countries in convergence process tend to have problem of structural external imbalance that is covered with foreign capital inflows. FDI are long-term and sustainable source of financing the current account deficit. The aim of this paper is to test if FDI together with chosen macroeconomic indicators are relevant factors of trading balance in EEEs in order to give useful implications towards economic policy creators in emerging economies. The research hypothesis is tested with robust micro panel models for total sample and two subperiods: before and after the structural break caused with Global financial crisis (GFC). The results indicate that substantial FDI inflows are significantly related with negative sum of trading balance on the total sample level i.e. average external position deficit is financed with the FDI inflows. Also, dummy variable for the Western Balkans indicates that FDI are significant variable that finances external imbalance in this subsample. The government policy recommendations are directed towards incentive measures for attracting greater FDI inflows, especially greenfield investments motivated with greater efficiency and export stimulation in order to stabilize trading balance and foster economic growth.
Durability performance of a lime stabilized expansive soil with egg shell ash as a subsidiary admixture
Authors: Sivapriya Vijayasimhan , Jijo James , Yuvaraj Karunanithi , Sushritha Gunipati
Published: June 2022

Stabilization is broadly classified as mechanical and chemical stabilization. Lime stabilization is the most commonly adopted method for stabilising expansive soils. In recent years, lime has been combined with other waste materials for improved performance in stabilization. One such waste is egg shell waste, generated by the poultry industry. Calcination of egg shell waste results in the formation of egg shell ash (ESA) which has a chemical composition very similar to that of quick lime. This investigation focuses on the potential of ESA as an auxiliary additive for lime in the stabilization of expansive soils. The initial consumption of lime of the expansive soil was determined using the Eades and Grim pH test. The lime content in the stabilization process was modified with ESA up to 0.5% in increments of 0.1%. Unconfined compression strength test samples of dimensions 38 mm x 76 mm were cast and cured for a period of 21 days and tested for their strength. The durability of the samples was also evaluated by subjecting the samples to 1, 4, 7, and 10 cycles of wetting and drying. The results of the investigation revealed that 0.2% ESA was the optimal dosage of additive to lime stabilization for improved performance.
Analysis of the seismic response of an RC frame structure with lead rubber bearings
Authors: Zorić Andrija , Zlatkov Dragan , Trajković-Milenković Marina , Vacev Todor , Petrović Žarko
Published: June 2022

Base isolation of buildings is the most efficient way of designing seismically resistant structures. Application of seismic isolators allows mutually independent movements of the ground and the structure during earthquakes. The application of seismic isolators increases the natural period of vibrations, which reduces the seismic forces in the structure. The paper analyzes the influence of the application of lead rubber bearings on the response of the structure to the action of an earthquake. A reinforced concrete frame structure was analyzed both for the case of base isolation and rigid foundation. Based on the comparative analysis of the natural period of vibrations, base shear seismic forces, displacement of the top level of the structure and relative inter-storey drift, conclusions were drawn about the efficiency of application of this type of seismic isolator. The required amount of ductility of a structure, as well as damage to structural and non-structural elements, is greatly reduced by base isolation.
Certain integral representations involving hypergeometric functions in two variables
Authors: Younis Jihad , Jain Shilpi , Agarwal Praveen , Momani Shaher
Published: June 2022

Various integral representations of hypergeometric functions have been introduced and investigated due to their important applications in divers fields. In this article, we define some new Euler-type integral representations for the Horn's functions of two variables G1, G2, G3 and H1.
Intellectual capital and financial performance of entrepreneurs in the hotel industry
Authors: Ognjanović Jasmina , Slavković Marko
Published: June 2022

Intellectual capital is recognized as a key factor in creating value and gaining and maintaining a competitive advantage among service companies. Intellectual capital can be a useful tool for improving the entrepreneurial performance if it is managed properly. The existing literature does not provide enough insight about the role and importance of intellectual capital among entrepreneurs in the hotel industry. The main goal of the paper is to identify the relationship between intellectual capital and financial performance of entrepreneurs in the hotel industry. The descriptive statistics, correlation analysis and multiple regression analysis were applied. Based on the applied statistical methods, it is concluded that intellectual capital has an impact on operating profit and productivity of entrepreneurs in the hotel industry. The results also indicate that human capital had the greatest contribution to improving the financial performance of entrepreneurs in the hotel industry.
A study of the influence of the COVID-19 pandemic on tourist behaviour and expectations: A case of Serbia
Authors: Mandarić Marija , Sekulić Dejan , Davidson Rob
Published: June 2022

Due to the spread of COVID-19 and the closing of the borders of a large number of countries, tourists' interest in domestic tourist destinations has grown. The objective of this paper is to identify future behaviour patterns of tourists and to propose measures that would affect the interest of domestic tourists in domestic destinations after COVID-19. The study starts with an analysis of the impact of COVID-19 on global tourism, then focuses on trends in the tourism market in Serbia and ends by examining citizens' attitudes towards key factors for domestic tourism development. It is estimated that tourism can benefit from an essential understanding of tourists' demands for a safe journey. Research results indicate statistically significant differences in the attitudes of respondents in relation to age, gender and education, but most respondents believe that it is necessary for the state to invest more in tourist infrastructure and to adjust pricing policy to remain competitive domestic destinations after Covid-19.
The impact of fear of COVID-19 infection on consumers' intention to visit restaurants
Authors: Gajić Tamara , Penić Mirjana , Vukolić Dragan
Published: June 2022

The problem of excessive tourism has overnight become an ideology and a part of the past. With the appearance of the COVID-19 pandemic, the flow of tourist movements was abruptly interrupted, and thus the visits to restaurants. The aim of the research was to determine whether the fear of the users of the pandemic infection affects the intention to visit restaurants. The total number of respondents was 508, in 27 restaurants in the Republic of Serbia. The authors used exploratory factor analysis (EFA) and multiple regression analysis with mediation for data processing. The research concluded that the perceived fears of the respondents may influence the decision to visit restaurants. The importance of research is reflected in the application of results in theory and practice, in order to facilitate business during the pandemic.
Rural tourism as a driver of the economic and rural development in the Republic of Serbia
Authors: Dimitrijević Miloš , Ristić Lela , Bošković Nikola
Published: June 2022

Rural tourism supports the linking of the economic, social and environmental development elements, while boosting employment and stepping up rural development This paper aims to assess the importance of rural tourism in terms of the economic and rural development in the Republic of Serbia. The Kruskal-Wallis test was used to compare the values referring to the number of registered tourist arrivals and overnight stays per region. According to the research findings, the region of Šumadija and Western Serbia has the largest number of rural households and also records the highest number of tourist arrivals and overnight stays. In developed countries, the tourism industry strongly supports the agricultural sector by creating new jobs and contributing to the overall economic development, however, the situation is quite different in Serbia. Furthermore, considering the EU, where the rural areas cover a large part of the overall territory, it is exactly the rural areas that account for a significant number of overnight stays and accommodation facilities.
English language knowledge as a determinant of employability in hotel industry: The case of Vrnjačka Banja, Serbia
Authors: Pešić Dragana
Published: June 2022

English has become widely accepted as the language of hotel industry and one of the core soft skills of employability. Since the perceptions of different stakeholders in education often differ to a certain extent, when designing a language course at a university level, it is of utmost importance to take into consideration the opinion of industry practitioners. The aim of the present diagnostic quantitative study employing case study methodology is to look into the importance of English language knowledge for employability in the hotel industry, define field-specific foreign language needs and identify the problems faced in supplier-consumer encounters. The obtained results point to the fact that hotel employees find English important for successful performance. The most necessary skills proved to be speaking and listening comprehension, followed by writing and reading. The identified problems faced in communication were related to inability to understand the interlocutor and the lack of proper lexical knowledge.
Retraction: Evaluation of the impact of black carbon on the worsening of allergic rhinitis and asthma in the region of Uzice Serbia (2021, vol. 26, br. 83, str. 7-26)
Authors: Uredništvo U
Published: June 2022

Authors Vesna Tomić Spirić, Jelena Marinković, Janko Janković, Andja Ćirković, Nenad Relić and Slavenka Janković withdrew from the paper Evaluation of the impact of black carbon on the worsening of allergic rhinitis and asthma in the region of Uzice Serbia, published in the journal Medicinski glasnik number 83, at their personal request, because the paper was printed without their consent.
Image-guided methods in the treatment of thyroid nodules and cancer
Authors: Janić Tamara , Stojković Mirjana , Klet Sanja , Marković Bojan , Nedeljković-Beleslin Biljana , Ćirić Jasmina , Žarković Miloš
Published: June 2022

Thyroid nodules (TN) are present in about half of the population. About 5% of all nodules are malignant. Image-guided methods for the treatment of TN are becoming a significant alternative to surgery. Percutaneous ethanol ablation (PEA) is effective in the treatment of thyroid cysts, and neck lymph node metastases. Percutaneous laser ablation (PLA) significantly reduces the size of the nodules and improves subjective symptoms. The adverse effects of PEA are rare, transitory, and mild. Radiofrequency ablation (RFA) is effective for nodules of all sizes and compositions. The major complications of RFA are rare and transient. Microwave ablation is also effective in the treatment of thyroid nodules with rare major complications. High-intensity focused ultrasound (HIFU) is a transcutaneous method. It is effective in the treatment of thyroid nodules, and complications are rare. Graves' hyperthyroidism was also treated with HIFU. As thermal ablation (TA ) methods are becoming more popular in 2020, the European Thyroid Association published clinical practice guidelines for the use of image-guided ablation in benign thyroid nodules. A meta-analysis showed that low-risk papillary thyroid microcarcinoma recurrences after TA treatment are rare, as are complications. As the TA methods are acceptable for the treatment of the low-risk papillary thyroid carcinoma European Thyroid Association and Cardiovascular and Interventional Radiological Society of Europe issued clinical practice guidelines for the use of minimally invasive treatments in malignant thyroid lesions. Image-guided treatments for thyroid nodules and cancer are here to stay. Their use will expand and become part of routine clinical practice.
Latent tuberculosis: Most common dilemmas or who asked for quantiferon?
Authors: Laban Marija , Omčikus Maja , Đikić Marina , Marković Filip , Dalifi Sead
Published: June 2022

Due to the increasing use of immunosuppressants, particularly biological therapy, as well as HIV epidemics, latent tuberculosis (LTBI) is being activated, and this disease, which had been rather forgotten in the Western world, is becoming a topical issue in the recent years. Numerous categories of patients should be tested for latent tuberculosis, using PPD or IGRA tests. Interpreting test results is a very touchy issue, since it is the way to determine therapy of latent TB, that is, to decide on chemoprophylaxis. For the last two years, during the Covid-19 pandemics, large percentage of patients received high doses of corticosteroid and other types of immunosuppressant therapies, and it is therefore necessary to consider the potential risks for these patients, in terms of contracting tuberculosis and perhaps testing them for LTBI.
Different forms of mycobacterial infections in patients receiving anti-TNF therapy: Case reports
Authors: Laban-Lazović Marija , Blanka Ana , Adžić-Vukičević Tatjana , Đikić Marina , Trboljevac Nikola
Published: June 2022

Biological agents, including TNF-alpha antagonists, have been used in treatment of autoimmune diseases for over 20 years. Due to impaired T-cell immunity and blocked effects of TNF-alpha mediator, patients receiving this therapy have increased risk of developing tuberculosis or other non-tuberculous mycobacterial infections. Both tuberculosis and other mycobacterial infections may occur anytime in patients who have ever used these medicines, even after the first injection. Most often we see activation of latent tuberculosis confirmed by screening tests. IGRA tests (QuantiFERON and T-SPOT.TB) are significantly more sensitive and specific for testing population of immunosuppressed patients, in comparison to tuberculosis skin test. There are contemporary recommendations for diagnosing, monitoring, chemoprophylaxis and treatment of latent and active tuberculosis in adults and children in case of planning administration of TNF-alpha antagonists or in cases when these drugs have already been used. Prevention of active tuberculosis via diagnosing LTBI and use of chemoprophylaxis is the crucial component of the strategy of World Health Organization for elimination of TB (End TB Strategy).
Aggressive clinical course of medullary thyroid microcarcinoma
Authors: Janić Tamara , Stojković Mirjana , Klet Sanja , Marković Bojan , Nedeljković Beleslin , Ćirić Jasmina , Žarković Miloš
Published: June 2022

Medullary thyroid carcinoma is a form of neuroendocrine tumor that arises from parafollicular C cells which produce calcitonin. In addition to calcitonin, these cells produce smaller amounts of other peptides, including carcinoembryonic antigen (CEA), which is used as a nonspecific tumor marker in the follow-up of patients with this tumor. MTC is a rare thyroid tumor and occurs three times more often in women than in men. It can occur in two forms, sporadic (80%) and familial form (20%). The familial form can occur alone or in association with other endocrine tumors within MEN 2A and MEN 2B syndromes. The sporadic form most often occurs in the fifth and sixth decades of life. The familial form is inherited autosomally dominantly, most often based on a mutation in the RET protooncogene located on chromosome 10. C-cell hyperplasia is considered to be a premalignant lesion, which precedes medullary carcinoma. Medullary carcinoma metastasizes very early. We presented a patient with a sporadic form of MTC which appeared at a typical age. Initial values of both baseline and stimulated calcitonin were not in the range for suspected MCT, but due to persistent increases in calcitonin, with elevated baseline (63 pg / mL) and higher stimulated calcitonin (96 pg / mL), the patient was referred for surgical treatment. Due to the strong correlation of calcitonin values with tumor size, the initial calcitonin values were expected to be low because the tumor was 3 mm in size. The histopathological diagnosis was C-cell hyperplasia. However, due to the fact that nodular C-cell hyperplasia is histopathologically difficult to distinguish from medullary microcarcinoma, based on the persistent increase in calcitonin levels, the patient was likely to already have metastatic disease at the time of thyroidectomy. Definitive diagnosis was made by liver biopsy. Therapy with tyrosine kinase inhibitors was introduced, and calcitonin levels strarted to decrea, but there is an increase in carcinoembryonic antigen, which is a poor prognostic parameter.
Efficiency of the transport system operation in separation at the open pit "Dimnjače"
Authors: Razić Rusmir , Mašić Sunčica , Brčaninović Muhidin , Alić Nedžad
Published: June 2022

This paper sets out the methodology and presents the results of calculation the efficiency of transport system in separation of the OP "Dimnjače", based on the data of monitoring the operating time and downtime/failure. Properly determined state of operation of the transport system, allows preventive measures and selection of maintenance strategy. Data collection lasted a year, and the data were analyzed, and thus the results are given by month for the transport system as a whole.
Environmental risk assessment for the unregulated waste disposal sites of municipal waste in the city area of Bor
Authors: Staletović Novica , Đurđevac Vanja , Mitić Dejan , Tašić Dušan , Tucović Nedeljko
Published: June 2022

The problem of unregulated waste disposal sites is present not only in Serbia but in the other parts of the Republic of Serbia. Therefore, it is necessary to locate these waste dumpsites, investigate their negative impact on the environment, make environmental risk assessment and start solving this problem. This presentation shows a methodology of the environmental risk assessment for the unregulated waste disposal sites in the city area of Bor. The idea, presented through this methodology, suggests how to understand the risk, how to make the risk assessment so that the owner is informed about possible consequences. In this way, a possibility can be avoided that in fear of unknown and incapable of understanding, the owner might take the precautionary measures at random. With regulated categorization a remediation of waste disposal sites can be done.
Quality investigation of sand for the production of aggregates on the Vinogradi locality (Deliblatska peščara)
Authors: Krstić Slađana , Kržanović Daniel
Published: June 2022

This paper represents a study which was made to evaluate and interpret the variations in the quality of sand as a potential raw materials for the production of adregate on the Vinogradi locality (Deliblatska peščara). Since deposits of sand constitute a valuable resource for a region, it is desirable that extent and quality variations of these deposits are known. It was hoped that an evaluation of certain properties of sand would assist in determining the value of the Vinogradi locality (Deliblatska peščara) as an undeveloped aggregate source indicating the relative quality of sand from alternate sites of the Deliblatska peščara.
Ewallet-innovation of technical progress and competition
Authors: Katanić Jelena , Katanić Zoran , Katanić Maja , Miletić Verodrag
Published: June 2022

Globalization has produced a growing uncertainty, but also a decrease in the probability of outcome the events caused by changes. The changes have brought about technical progress and competition. The condition for implementing change is the ability to master and understand. The use of smartphones with the possibility of Internet access is increasing exponentially, and thus the popularity of electronic payment for goods and services. Consumers are willing to absorb the information technology as well as to take the certain risks using the mobile applications. The theory of acceptance, use of technology and innovation is offered to the consumers around the world in the form of e-wallets. That is why it is said that the innovation is not one-time action, but a process.
Key activities of digital business transformation process
Authors: Ubiparipović Bogdan , Matković Predrag , Pavlićević Veselin
Published: June 2022

Background: Digital transformation is by itself a fragmented area, due to different perspectives encountered in the literature. The research problem addressed in this paper is a general lack of consent on the content of digital transformation and the lack of a comprehensive framework for implementing digital transformation initiatives. Purpose: The aim of this paper is to identify distinct key activities of digital transformation through a systematic literature review, and in doing so contribute to defining the scope of digital transformation and the structure of digital transformation as a process. Study design/methodology/approach: This research was conducted by means of a systematic literature review, with the aim to ascertain the general structure of the digital transformation process through identification of its key activities. Finding/conclusions: A total of 19 items were identified as activities of digital transformation, which were subsequently distributed among the 6 distinct stages of the digital transformation process, in an effort to advance the understanding of the notion and the scope of digital transformation through clarification of its content. Limitations/future research: The results of this research should be instrumental for the future research aimed towards developing generic, universal guidelines for companies seeking to embark on digital business transformation journeys.
The concept of place in literary tourism
Authors: Nikolić Jovana
Published: June 2022

The aim of this paper is to depict how the concept of place is presented and interpreted in literary tourism. Drawing upon the poststructuralist and postmodern theories of culture and tourism the paper will explore the relation between the literary places and tourists. In other words, the paper examines how the literary places influence visitors' experiences of certain places and how the visitors assign meanings to the fictional places which exist in the real world and vice-versa (the real places which also exist in the world of fiction). In the context of literary tourism the boundaries between the fictional and non-fictional worlds are inevitably blurred in the tourist's experience. The tourist becomes the active creator of both, the potential tourist offer and the authentic experience which is personal and subjective. In order to create the appropriate tourist offer to the bibliophiles it is of the utmost importance to understand the way visitors experience such places. In order for the literary place to become popular it is necessary to include several factors including the creative act of the visitor.
Independent food production as immediate gastronomical authenticity of the region of importance for the development of tourism in Vojvodina
Authors: Kalenjuk Bojana , Grubor Biljana , Đerčan Bojan , Ivanović Velibor
Published: June 2022

Gastronomy and food production and preparation in certain areas reflect the cultural and traditional characteristics of people who live there. Vojvodina is characterized by a variety of cuisines of the people who lived and still live in this area. This study will attempt to depict the differences in the production of agricultural and food products in Vojvodina's households, as well as the basics for the preservation of authenticity and traditional values of gastronomy. The aim of this work is to examine the representation of agricultural and food production in counties of Vojvodina and which county has the most potential to attract food-oriented tourists. The research is conducted through a survey questionnaire among the residents of Vojvodina. The re-search is conducted from October 2020 to May 2021. 619 respondents took part in the research. The data collected were processed by applying descriptive statistics, which are then presented tabularly and graphically. This research concludes that traditional values in Vojvodina are preserved through pro-duction of agricultural and food products inside this area. The south part of Bačka has the most potential for the development of tourism, while the production of agricultural and food products is widely represented in central Banat, west parts of Bačka and Srem.
Genealogía de las figuras de la infancia y juventud “problemática” en la Argentina moderna
Authors: Gentile Maria Florencia
Published: June 2022

Este artículo explora la hipótesis de la existencia de una relación intrínseca entre la configuración de problemas públicos situados en distintos momentos históricos de la Argentina, y la definición de los atributos de la condición infantil y juvenil, tanto las consideradas hegemónicas como aquellas clasificadas como “problemáticas”. Para ello revisa investigaciones socio-históricas sobre infancias y juventudes a la luz de las perspectivas de la socioantropología relacional de las edades y de la sociología de los problemas públicos. Como resultado, presenta una genealogía de las “figuras de las infancias y juventudes problemáticas” más emblemáticas en la Argentina y de su abordaje hegemónico, que motivaron sendas discusiones públicas desde fines del siglo XVIII (con la primera institución destinada a niños) hasta la actualidad.  Construir tal genealogía requiere dar cuenta de las condiciones sociales que hicieron posible la emergencia de determinadas figuras, las concepciones y disciplinas teóricas que organizaron los relatos en cada momento, los actores que intervinieron en el debate público y las respuestas institucionales que suscitaron y terminaron de darles forma. Desde la figura del “hijo ilegítimo” en la sociedad virreinal hasta la actual figura del “menor delincuente” o “pibe chorro”, estas figuras constituyen un marco interpretativo, una especie de sedimento cultural disponible en el que los actores inscriben las construcciones de cada nuevo problema, retomándolas y resignificándolas en diálogo con los procesos sociales de la actualidadde los límites que la práctica de tiro tuvo durante el período entre los estudiantes.
Palabras clave: infancia y juventud “problemática”; construcción social de la minoridad; sociología de los problemas públicos.
Nas páginas dos processos judiciais: crianças e adolescentes, suas vozes, participação protagônica e contraconduta
Authors: Machieski Elisangela da Silva
Published: June 2022

O presente trabalho visa articular algumas experiências do público infantojuvenil, encontradas em meio a processos judiciais, para compreender como crianças e adolescentes institucionalizados lidavam com as decisões tomadas pelos adultos, sejam eles familiares, funcionários do abrigo ou operadores do Direito. Para alcançar tal objetivo, parte-se das seguintes perguntas: Em que ocasiões as crianças/adolescentes abrigados foram escutados? Quem os escutava? Sobre o que falavam? O que os adultos faziam em relação ao que ouviam? E, quando não eram ouvidos, que estratégias utilizavam? A ideia é apresentar a perspectiva infantojuvenil, suas ações, estratégias, sentimentos, apontando-os como sujeitos históricos. Elegeram-se como fontes documentais 36 processos judiciais da Vara da Infância e Juventude de Criciúma, datados da década de 1990. Tal recorte temporal esteve pautado na promulgação do Estatuto da Criança e do Adolescente e na premissa de compreender como e em quais situações as oitivas aconteciam. O Estatuto, Lei 8069/90, estabelecia que os adolescentes fossem previamente ouvidos e tivessem a sua opinião considerada em caso de colocação em família substituta. No entanto, os casos aqui analisados apontam para um cenário em que a oitiva não era uma prática constante nos primeiros anos da década de 1990, quadro que foi sendo alterado nos primeiros anos de 2000. Essa experiência de passado fez com que um novo horizonte, aos poucos, se fosse moldando, resultando na implementação da Lei 12.010/09; a partir daí, outros princípios foram incluídos no procedimento de oitivas do público infantojuvenil.
Esos inocentes parias. Experiencias de trabajo y representaciones sobre el trabajo infantil en el diario La Vanguardia. Buenos Aires, comienzos del siglo XX
Authors: Melo Viviana Vanesa de , Zapiola María Carolina
Published: June 2022

Este artículo explora la historia de un sector de la población comúnmente relegado: los niños trabajadores. Puntualmente, se analizan los modos en los que el diario La Vanguardia -órgano de prensa oficial del Partido Socialista argentino- abordó y representó, durante las dos primeras décadas del siglo XX, las problemáticas relativas a la infancia trabajadora proveniente de los sectores populares de Buenos Aires.
Unusual Presentations of Disseminated Cutaneous Rhinosporidiosis Masquerading as Tumour Like Lesions of Skin: A Clinicopathological Study
Authors: Nayak Sunanda , Pandey Swetalina
Published: June 2022

Introduction: Rhinosporidiosis is a chronic granulomatous infective disease caused by Rhinosporidium seeberi which primarily affects the mucosa of the nasal cavity. Cutaneous lesions are infrequent. However, disseminated cutaneous lesions with varied presentations are very rare in routine pathology practice. Aim: The study aimed to diagnose cutaneous lesions due to rhinosporidiosis on Fine-Needle Aspiration Cytology (FNAC) and to confirm the same by histology. Materials and Methods: This was a cross-sectional study. A total of 8 cases of disseminated cutaneous Rhinosporidiosis out of 815 cutaneous lesions were observed over five years, from September 2013 to October 2018, in Department of Pathology, VIMSAR, Burla. FNAC and scrape cytology of the lesions were performed and studied after Diff-Quik and H&E stain. The lesions were excised and histopathological examination was done. Results: It was observed that the overall incidence of cutaneous rhinosporidiosis diagnosed on FNAC was very low (less than 0.1%) They were mainly seen in middle-aged males from low socio-economic status and rural areas. The skin lesions were mostly subcutaneous nodules, few wart-like growth and ulcerative growth, some of which were initially diagnosed as neurofibroma and squamous cell carcinoma. FNAC and histopathological examination helped to confirm the diagnosis of rhinosporidiosis in all cases. Conclusion: Disseminated cutaneous rhinosporidiosis has varied clinical presentations, mimicking other cutaneous lesions. Hence, proper diagnosis of the patient is necessary which can be achieved by FNAC and histopathology.