bluuebunny/crossref_metadata_2025 huggingface dataset:
Valuation of intangible assets according to IFRS 13
Authors: Stevanović Tatjana , Milenović Jovana
Published: December 2022

The transition from industrial to information society has led to a change in the basis of companies' further growth and development. Intangible assets are becoming the most important source of social and economic development. They are the same time the strongest weapon in companies' fight for competitive advantage. Quality management of intangible assets is the key for creating the modern company value and investment in intangible assets has become the key measure of company performance. Treatment of intangible assets and their accounting treatment occupy the attention of a great number of scholars. International Financial Reporting Standard 13 - Fair Value Measurement gives the definition of fair value, pointing to the need for disclosure of the value thus determined. The challenges companies face when applying IFRS 13 may lead to its inconsistent application and unplanned costs. The aim of this paper is to consider measuring the fair value of intangible assets by applying IFRS 13, as well as its effects in practice.
Analysis of the financial performance of public companies in the conditions of uncertanity by the Covid-19 pandemic
Authors: Jakšić Pavle
Published: December 2022

If we take into account that public companies perform activities that are of general interest to citizens, with the main goal of improving the quality of the service provided, then there is a need for continuous analysis of their operations. In the paper, through the analysis of financial reports, i.e. through ratio analysis, the operations of public companies operating in the territory of the city of Loznica, whose founder is the City of Loznica, are reviewed. The goal of the work is a realistic presentation of the financial indicators of observed public companies in the period from 2018 to 2020. A special emphasis is placed on the year 2020, where through the analysis of the values of the obtained ratio indicators, it would be determined whether the crisis caused by the corona virus pandemic possibly affected some of the company's financial parameters. The paper also shows the impact of the pandemic on the operations of other public utility companies on the territory of Serbia.
Choice between active and passive portfolio management strategy
Authors: Leković Miljan
Published: December 2022

Relevant financial literature has for decades recorded debates about the choice between active and passive portfolio management strategy. In order to enrich domestic literature in this field, the paper presents the basic characteristics of these strategies, at the same time pointing to their positive and negative aspects. The aim of the research is to answer the question of which of these portfolio management strategies is superior. By putting forward arguments in favor of and against the choice of active and passive portfolio strategy, it is concluded that neither strategy is perfect and that it is impossible to talk about the superiority of active or passive portfolio management, as both strategies and both portfolio management models contain equally serious shortcomings that prevent them from achieving superiority. Problem solution should be sought in the implementation of a hybrid portfolio strategy that simultaneously integrates benefits and alleviates the disadvantages of these strategies.
The influence of the pandemic of covid 19 on the index values in the selected countries
Authors: Kovinić Nikola
Published: December 2022

The pandemic of Covid 19 may have started in 2019, but in 2021, the world faced health crises that will have lasting and immeasurable after effects across the health care, social and economic spectrum. The pandemic of Covid 19 has changed the world and brought many socio-economic changes on the global level, endangering the economies of the world, as well the economy of our country and nearby countries. The Republic of Serbia, as well as the nearby countries, tries to employ all the possible solutions and measures to lessen the economic aftereffects of the pandemic of the virus. The countries have started using a wide variety of restrictive measures, so they can control, prevent and end the pandemic and the measures have been different: sometimes the country borders have been closed, the interstate traffic was limited, there was a quarantine in some of the countries and even a curfew. The measures that Serbia has taken and is still taking - as well as nearby countries - (Croatia, Bosnia and Hercegovina, Northern Macedonia and Montenegro), will have lasting results because they have prevented the drastic economic downfall. How will the downfall be described and whether or not it was the real feel of the individual, we will find out in this research and the comparison of the stock indexes in our country and the nearby countries.
Value-added tax in Benelux countries
Authors: Inđić Milica , Đaković Miloš , Matić Aleksandra
Published: December 2022

In the Benelux countries, value-added tax (VAT) revenue is a significant source of fiscal revenue, and for that reason, it plays an extremely important role in creating the fiscal policy of this group of countries. Value-added tax is a type of sales tax that taxes all stages of sales, from the producer to the final consumer. This form of taxation satisfies both fiscal and non-fiscal goals of taxation and has a dominant position in the fiscal systems of modern states. The aim of the paper is, based on data collected from relevant sites, for the period 2000-2020. year, analyzes the value-added tax in the Benelux countries. The paper presents a theoretical overview and findings, which can be helpful to tax policymakers, with special emphasis on indirect taxation. Pointing out the importance of VAT revenues and closing the VAT gap is the basic practical implication of this paper.
Manufacturer's awareness of halal product (dry vegetable mixture), placement and marketing
Authors: Obralić Ema , Semić Amela , Rondić Edita , Polić Lejla
Published: December 2022

The aim of the research is focused on researching the perception of the quality of products based on dried vegetables, which influences the consumer to buy halal food products. Three halal products based on dried vegetables DO-DO spice, Vegedor and Tajna-supplement to vegetable dishes were used for the research. Halal product status was examined through composition, specification of raw materials, supervision of the procurement process, validation of the production process and verification of the composition of finished products. Hygienic-toxicological, technological, nutritional-physiological, sensory, and market-consuming quality factors were considered. The content of iodized table salt as a basic carrier is different in the analyzed samples. The conducted analyzes determined that Vegedor and Tajna-supplement to vegetable dishes have a salt content of up to 56%, while DO-DO spice has a 60% content. If we compare the max. permitted content of salt in spices, we can conclude that Vegedor and Tajna-supplement to vegetable dishes have 4% less table iodized salt than allowed. By reducing the share of table salt, the producer focuses on the health of consumers if the WHO recommendation on the necessary reduction of daily salt intake is taken into account. The share of other raw materials in a homogeneous mixture is inherent in the nature of the spice produced. The obtained results, determined HrCCP points indicate that DO-DO spice, Vegedor and Tajna, in addition to halal status, also have functional properties for the end user.
Correspondence analysis of fruit and vegetable waste among consumers in Vojvodina
Authors: Ubiparip-Samek Dragana , Pezo Lato , Mastilović Jasna , Kovač Renata , Zoranović Tihomir , Vlahović Branislav
Published: December 2022

Fresh fruit and vegetables contribute to almost 50% of food wasted by households in the EU. To understand the main reasons for wasteful behaviour among the consumers in Vojvodina (Serbia) cross-sectional data were collected through a self-administrated online survey of 711 correspondents. The questions presented in the study focused on the method of preserving the fruits and vegetables in domestic conditions before their consumption. Self-estimation of wasteful behaviour in the household and socio-demographic factors, including the respondents' self-estimated health status, were analysed using the correspondence analysis. The results showed that the first two dimensions explained for 95.06% of the total per cent of inertia (statistically significant at p<0.001 level) indicating the strong relationship among variables. According to the survey, the fruit and vegetables are most likely used fresh (54.43% and 48.95%, respectively), whereas the use of fruits and vegetables after storage in a refrigerator (17.16% and 29.96%, respectively) or in a deep freezer (2.81% or 5.20%, respectively) is significantly lower. Most of the survey correspondents claimed that they regularly discard the fruits and vegetables to waste (53.02% and 39.66%, respectively). The results pointed out that the storage and the amounts of discarded waste are affected by gender, income, and health conditions of the respondents'. Also, the study emphasized the growing need for educating and better planning of fresh fruit and vegetable management to reduce waste production.
Effect of alkaline treatments in lye and slaked lime on some nutrients, antinutrients and in vitro protein digestibility of Egyptian riverhemp (Sesbania sesban) seeds
Authors: Arekemase Shefiat , Abdulwaliyu Ibrahim , Okoduwa Stanley , Anigo Kola , Ameh Danladi
Published: December 2022

Sesbania sesban is widely distributed in different parts of Nigeria and is used as forage or green manure. However, the levels of antinutritional factors associated with the seed limit its use as an alternative feed for livestock. Therefore, this study determined the effect of alkaline treatments on some nutrient and antinutrient composition and in vitro protein digestibility of the seed of S. sesban. The seeds were treated by soaking (for 24 hours) and boiling (for 30 minutes) in slaked lime (calcium hydroxide) or lye. Afterwards, the boiled and soaked samples were properly dried at room temperature. The samples were then analysed using standard methods for proximate analysis, antinutrients, and in vitro protein digestibility. It was revealed that crude protein content was significantly (p<0.05) higher for samples boiled in slake lime (BSL) and in lye (BL) compared to unprocessed sample (RS), whereas carbohydrate content showed a significant (p<0.05) reduction in BSL compared to the RS. Regarding antinutrient content, the treatments caused a significant (p<0.05) reduction in tannins (37.1-76.5%) and trypsin inhibitors (34.2-68.0%), as compared to RS. The treatments were also effective in the reduction of saponins, oxalates, phytates and cyanogenic glycosides. In vitro protein digestibility was significantly higher in the treated seeds, following the order: boiling in lye>boiling in slaked lime> soaking in slaked lime>soaking in lye. The seeds of S. sesban, if properly processed using lye, could serve as a potential alternative compound for livestock feed. The results of this research confirmed that treatments with lye, which is much less costly and more available to rural communities are comparable to those based on slaked lime and can be used interchangeably.
Utilization of Amaranthus spp. grains in food
Authors: Bodroža-Solarov Marija , Šimurina Olivera , Kojić Jovana , Krulj Jelena , Filipović Jelena , Cvetković Biljana , Ilić Nebojša
Published: December 2022

Recently there has been a rediscovery of some ancient crops due to increased consumer demands for a healthier diet with medicinal and therapeutic effects. One such crop is a pseudocereal Amaranthus sp., which is nutritionally more favourable than many widespread kinds of cereal and meets most of the requirements of modern diets. The incorporation of amaranth species in food formulations would expand the assortment of food products present on the market. The high nutritional quality and potential functionality of amaranth-based food products have been the subject of extensive scientific research. This study aims at reviewing the currently available data on the application of amaranth grains in the food industry and manufacturing and focuses on the functionalities of these products, providing an overview of the current amaranth value chain.
Modeling fruit and vegetable consumption in Serbia
Authors: Ubiparip-Samek Dragana , Pezo Lato , Mastilović Jasna , Kovač Renata , Zoranović Tihomir , Vlahović Branislav
Published: December 2022

Although regular intake of fruits and vegetables has an essential role in a healthy diet and well-being, a majority of consumers in Serbia have a suboptimal intake of these groceries. To understand the main determinants of this unsatisfactory situation, the study tested an extended model of the theory of planned behavior intending to suggest necessary steps for improving fruits and vegetables daily intake. This theory, extended for the role of knowledge, was tested using structural equation modeling. Fit indices confirmed the utility of this extended model of the theory of planned behavior in explaining consumers' behavior as well as the mediating role of behavioral intentions. Serbia, as one of the central developing countries in the Balkans, was chosen to test the model with the possibility of applying it to other developing countries facing malnutrition. Data were collected in North Serbia, through an online survey (n=688). Despite consumers' high awareness of fruits and vegetables' beneficial health effects, the influence of consumers' knowledge only is not sufficient to trigger behavioral changes. Consumers' intentions and behavior should be influenced indirectly, by changing their attitudes and subjective norms. All custom-made activities promoting a higher fruit and vegetable intake should consider the present findings to achieve a bigger effect on behavioral changes among consumers.
Lactate content, total polyphenols and antioxidant activity of selected commercial yogurts from the Serbian market
Authors: Pokimica Biljana , Popović Tamara , Petrović-Oggiano Gordana , Šarac Ivana , Glibetić Maria , Takić Marija
Published: December 2022

One of the most popular dairy products worldwide is yogurt, which flavor is highly influenced by lactic acid content. Yogurts with fruit preparations contain polyphenols, secondary plant metabolites with proven antioxidant properties. As there is no data regarding neither lactate nor polyphenol content in commercial yogurts in Serbia, this study aimed to determine lactate and polyphenol levels, as well as antioxidant activity in selected yogurts. A total of 15 plain and 5 fruit yogurts with strawberry preparations were analyzed. Lactate contents were from 0.83 to 1.33%. Three plain yogurts in plastic containers differed in lactate content. There was no difference in lactate content among the same plain yogurts packed in plastic and Tetra Pack containers. Fruit yogurts with strawberry preparations differed in total polyphenol content in the range from 6.84 to 29.11mg GAE/100 g and antioxidant properties were determined by reducing power test (from 0.22 to 0.79) and DPPH assay (from 28.13 to 87.23%), while there was no difference regarding lactate. Our results provided new information about the levels of lactate, total polyphenols and antioxidant activity of selected commercial yogurts available on the Serbian market.
Effect of ginger extract (Zingiber officinale) as a natural antioxidant on sunflower oil oxidation
Authors: Elsorady Muhammad , Elgindy Asma
Published: December 2022

Oil oxidation is significant for acceptability, nutritional quality, and toxicity of edible oils. Antioxidant supplementation for oil is a common and fundamental strategy for improving its oxidative stability and prolonging induction time. Ginger contains natural antioxidants such as phenolic and flavonoid compounds. Ginger extracts were prepared by extraction with different solvents (methanol, ethanol, acetone and water). Ethanolic ginger extract had the highest yield (10.52%), whereas the aqueous extract had the lowest yield (8.10%). Also, the ethanolic extract was the highest in the content of phenolic and flavonoid compounds (75.17 and 19.55 mg/g, respectively), followed by methanolic extract (67.24 and 17.46 mg/g, respectively). Thus, further elaboration focused on the ethanolic extract. The scavenging ability of ginger extract was dose-dependent; it increased with the increase in ginger extract concentration. As expected, the ginger extract had lower DPPH scavenging activity than BHT (synthetic antioxidant). Free fatty acid (FFA), peroxide value (PV), conjugated dienes (CD) and thiobarbituric acid (TBA) value were used to evaluate the effect of ginger extract as a natural antioxidant on sunflower oil oxidation. The higher the concentration of ginger extract, the lower the magnitude of FFA, PV, CD, and TBA in sunflower oil. According to our findings, the level of sunflower oil supplementation with ginger extract should be below 600 mg/kg. The result of this study suggests that ginger extract can be recommended as a natural antioxidant to retard sunflower oil oxidation.
Dynamic and pushover analysis of multi-storey reinforced concrete building using different load distribution pattern
Authors: Mahmood Mohamad , Mohamad Halla
Published: December 2022

One of nature's most dangerous phenomena are earthquakes which cause significant harm to both people's lives and property. In this study, four alternative approaches are used to demonstrate the distribution of lateral loads and compare its impacts on the results of a non-linear static pushover analysis of a ten-storey reinforced concrete (RC) building and study its response to the impact of an earthquake. In order to determine how the structure would respond to earthquake effects, pushover analysis which is an alternative way of time history analysis was adopted and the predicted results are compared with those of nonlinear time history analysis. Given that the building is situated in an area that is actively experiencing earthquakes and has rocky soil, the distributed lateral force is assumed to be equivalent to the design base shear. The study indicated an almost good suitable fit between two categories of pushover loading methods regarding security of the building, maximum base shear, and maximum displacement. The paper also presents a comparison between the results of nonlinear time history analysis at a particular roof displacement with that of pushover analysis.
Experimental, theoretical and numerical investigation of creep characteristics of fish scale powder-chicken feather filled polyester composites
Authors: Battawi Ali , Abed Balsam
Published: December 2022

Natural fibres would play a significant part in the production of composite materials since these fibres are entirely renewable, environmentally friendly, have a high specific strength, inexpensive, and biodegradable. The objective of this research is to investigate the potential of fish scale powder and chicken feather as reinforcing agents in polyester composites, as well as the composites' creep behaviour. Hand lay-up procedures were used to prepare weight fractions (0.2, 0.5, 0.8, and 1.1%) of chicken feather along with 5% fish scale powder. It is observed that the composite with 0.8% chicken feather and 5% fish scale powder showed encouraging results as it enhanced the creep strain by 74.29% and diminished the stress by 40.71% compared with neat polyester. The experimental, theoretical, and numerical results were compared. Good accuracy has been observed, with a relative error of no more than 3.2%. These findings indicate that natural fibres have enhanced creep properties and might be a feasible alternative to industrial applications.
The building of the Ministry of Foreign Affairs
Authors: Pavlović Marina , Mihajlov Saša
Published: December 2022

One of the most monumental buildings of Interwar Academicism in Serbia, the building of the Ministry of Foreign Affairs at Kneza Miloša 24-26, forms, together with the Government Building - the former Ministry of Finance - a harmonious ensemble shaped by the architect Nikolay Petrovich Krasnov. Although it was not built for the needs of the Ministry of Foreign Affairs, but rather for two other ministries (the Ministry of Forestry and Mining and the Ministry of Agriculture and Waterworks), the monumentality of the building corresponds to the importance of the institution that it plays host to. Ever since the formation of Serbian statehood at the beginning of the 19th century, there was a close and interweaving connection between the royal court and the institution in charge of foreign policy, which affected the choice, representativeness, location, and also the stylistic expression of the building in which the Ministry of Foreign Affairs was situated. The paper aims to comprehensively investigate the process of design and construction of the building of the Ministry of Foreign Affairs, and to further contextualize aspects of its construction. With a further aim being to comprehensively research the correlation of the siting and aesthetic projection of the headquarters of the Ministry of Foreign Affairs from the first office of the 'Foreign Department' of Miloš Obrenović to the current building in Kneza Miloša, special attention is also paid to the history of the actual location of the Ministry of Foreign Affairs, i.e. also its previous headquarters.
A work that never becomes obsolete: 125 years since the birth of architect Nikola Dobrović (1897-2022)
Authors: Kadijević Aleksandar
Published: December 2022

There are few realizations in modern Serbian architecture that are as constantly written and spoken about as those of the charismatic Nikola Dobrović (1897-1967). Melded in Central Europe, and affirmed in interwar and post-war Yugoslavia, his works left a deep mark in all areas of the profession, from design and construction, to urbanism, theory, criticism, historiography, conservation and university teaching. As an uncompromising visionary of the democratic city, he encouraged a radical modernization of the architectural stock, setting an example for the generations that followed. In doing so, he developed an independent conception of International Modernism, the principles of which he consistently advocated. Although there are fewer and fewer contemporaries who remember him, generations of admirers and architectural historians prevent Dobrović's personality and works from being forgotten, repressed or sanitized. Hence, as part of the celebration of the 125th anniversary of his birth in Belgrade, several events of a scientific and educational character were organized.
The unrealized project of the State Archives building (1922) by architect Dimitrije M. Leko
Authors: Kiproski Sanja
Published: December 2022

The unrealized project of the State Archives building (1922) is one of the earliest works of the prominent architect and university professor at the Technical Faculty in Belgrade, Dimitrije M. Leko. The project stands as an embodiment of the high-standard academic education of the architect, as well as his affectations and skill in designing monumental public buildings, which would come to have a deep impact on the Yugoslav architectural scene. As a witness to the gradual formation of the architect's particular authorial expression, the project is of great importance to a more complete understanding of his artistic opus. With a more detailed historiographical treatment, this paper strives to contribute to a more complete understanding of the complex history of the construction of the State Archives building, as well as to the genesis of Leko's own personal architectural style.
Development and performance evaluation of a motorized tumble barrel feed/food mixer
Authors: Etoamaihe Ukachi , Dirioha N.R. , Oke Uma , Babalola Oluwaseun
Published: December 2022

A tumble barrel food /feed mixer was designed and fabricated. It has a volumetric capacity of 0.33 m3 . The tumble barrel mixer consists of a hopper, a stainless steel barrel with baffles. It is mounted on a steel framework and driven by a shaft connected to stirrers inside the baffles. The baffles are alternatively placed in the barrel in such a way that they do not touch the stirrers during operation. The shaft is driven by a 3HP (2,25 kW) variable speed electric motor. Performance tests were conducted on the machine after fabrication using the ASAE (R2006) test standards, and also Completely Randomized Design (CRD). Three speeds of the mixer, 100,150 and 200 rpm (min-1 ) ( and four mixing times of 5,10,15 and 20 minutes were studied as they affected the Degree of Mixing (DM) of ground and shelled corn samples in the mixer. Results obtained showed, there was an increase in the degree of mixing as the speed of the machine increased from 100 to 200 rpm (min-1 ). Also the degree of mixing increased as the time of mixing increased from 5mins to 20 minutes for the three speeds studied. From the Analysis of variance tables, the calculated F-values were very much higher than the tabulated values at 5% probability. These indicate a high significance of the effect of speeds of mixing on the degree of mixing of the tumble barrel mixer. The speed of 150 rpm (min-1 ) gave the highest effect in the tumble mixer. From the difference of means tables, there were significant differences in the degree of mixing for 100 and 150 rpm (min-1 ) speeds for all the different time of mixing durations. However, in the 200 rpm (min-1 ) speed, there was no significant difference in the DM between the 15 to 20 minutes mixing time duration.
Practical model for estimating Taro Cocoyam volume based on its axial dimensions
Authors: Assian Ubong , Tosin Paul
Published: December 2022

Taro Cocoyam is prone to attack by rodents, insect pests and environmental elements. After drying, it is stored to evade wastage. In an effort to efficiently develop storage system, fundamental physical parameter such as volume of the fresh cocoyam with respect to its axial dimensions should be well expressed and modelled for easy estimation. In this study, fresh Taro Cocoyam samples were sourced, cleaned and packaged. Ten unpeeled samples were used in determining initial moisture content (% w.b). The axial dimensions of fifty unpeeled samples were measured and used to compute arithmetic mean diameter (DA). Corresponding true volume (VT) was found using water displacement approach. The bulk samples were grouped based on DA, into seven (7) size ranges. Mean and standard deviation of each parameter were computed. The model was established, verified and validated. Statistical analysis showed that the value of coefficient of determination (R2 ) was almost equals correlation coefficient (r ≈ 1). The values of reduced Chi-square (chc 2 ), root mean square error (RMSE) and mean bias error (MBE) were not that high. The values of coefficient of residual mass (CRM) and modelling efficiency (EF) were almost perfect. Therefore, the model established is practically good for estimating volume of Taro Cocoyam which could find application in the design of feed hopper and storage system.
Hydrogen electric motor vehicles: Testing and control trends
Authors: Popović Predrag , Stjelja Živko , Miletić Branimir , Vranješ Đorđe , Stojanović Veljko , Nikolić Vladimir , Marčeta-Kaninski Milica
Published: December 2022

Hydrogen Fuel Cell Vehicles (FCVs) are similar to EVs, in the aspect that they use an electric motor instead of an internal combustion engine to power the wheels. The main difference is that EVs run on batteries that must be plugged in to recharge, while FCVs generate their electricity onboard. This manuscript presents overview of the hydrogen vehicle certification legislation. Inspection and testing of motor vehicle technology today represent a set of a whole series of procedures that are applied in different stages of the vehicle development, production and operation of vehicles, and whose task is to provide objective information about the quality of the vehicle and its assemblies and parts, as well as about the conditions in which the vehicles operate, about workloads, environment, etc. Although there are adopted technical regulative for hydrogen powered EVs, the appropriate standards and legislation are still evolving.
Perioperative anaphylaxis caused by muscle relaxants: Do we know enough?
Authors: Marković Danica , Vuković Natalija , Milenković Jelena , Marković-Živković Bojana , Budić Ivana
Published: December 2022

Perioperative anaphylaxis caused by muscle relaxants represents a relatively rare, albeit a serious complication during anesthesia. It can result in serious morbidity or even mortality. This reaction usually happens before or after intubation of a patient, that is, a few minutes after muscle relaxant administration. The beginning of the reaction can be missed, even by the most experienced anesthesiologist, since its recognition depends on the severity of the symptoms. There are no guidelines specific to the therapy of muscle relaxant anaphylaxis and therefore therapy is based simply on the general guidelines. Also, in many countries, there are no registries of the incidence of anaphylaxis caused by muscle relaxants. Therefore, this is an extremely important subject for anesthesiology practice, and it requires more attention.
IMPLEMENTING BIM FOR FACILITY MANAGEMENT: DATA COORDINATION AND COLLABORATION
Authors: MANCHADO DEL VAL CRISTINA , GOMEZ JAUREGUI VALENTIN , OTERO GONZALEZ CESAR
Published: December 2022

Building Information Modeling (BIM) is recognized as being meaningful during the design and construction phases, but also can play an essential role in providing essential information about the facility or managing buildings’ life cycle. BIM is intended to improve different areas, as space management, energy efficiency, corrective and preventive maintenance among others. This paper presents a recent BIM implementation project focused on facility management (FM), covering the building plan approach, 3D modeling and information recording. Specifically, it describes the connection between 3D models and existing operating systems for carrying out maintenance and supervision, gathering information from maintenance database and real-time data from the existing controllers’ network. This article also describes the implementation process, along with the issues found and adopted resolutions.
Keywords: Building Information Modeling; BIM; Facility Management; FM;
VIABILITY ANALISYS FOR LASER DIRECTED ENERGY DEPOSITION (L-DED) OF POWDER MATERIAL15CDV6
Authors: Urresti Ubillos Aizpea , ARRIZUBIETA ARRATE JON IÑAKI , Murua De la Mata Oihane , Aristizabal Miren , UKAR ARRIEN ENEKO , LOPEZ BOLAÑOS DAVID
Published: December 2022

The aim of the present research work is the characterization of the 15CDV6 powder material for Laser Directed Energy Deposition (L DED) processes. The novelty of the work lays on the fact that this aeronautical steel has never been employed before in powder L DED process. Therefore, the mentioned steel powder was atomized specifically for the present work and the chemical composition and shape of the particles was measured to ensure the quality of the material. Afterwards, the suitability of the 15CDV6 steel for the L-DED process was studied and the employed methodology consisted of 3 sequential steps: single bead tests, overlapping beads deposition and thin wall construction. The results of each sequence are used as the basis for the following ones. In addition to the determination of the main process parameters, the influence of the deposition strategy on the process efficiency is analyzed and a correlation between the microstructure resulting from the thermal process and the hardness HV0.3 values was obtained. To finish the characterization of the process, a demonstrator part was fabricated using the optimum parameters defined during the tests. Based on the obtained results, the viability of employing 15CDV6 steel in the L-DED process is ensured. Also, it is concluded that if a sufficient cooling rate is ensured, Acicular Ferrite microstructure is obtained, which provides good mechanical properties to the L-DED manufactured parts. Nevertheless, the thermal evolution of the process needs to be controlled in order to avoid heat accumulation and cooling stops are to be applied when required.
Keywords: 15CDV6, powder, L-DED, characterization, atomization.
ANALYSIS OF THE ADVANCES IN THE DEVELOPMENT OF NEW GENERATION OF SUSTAINABLE, BIO-BASED AND/OR RECYCLABLE COMPOSITES
Authors: ARES ELEJOSTE PATRICIA , Seoane Rivero Rubén , NEIRA HERNANDEZ SANTIAGO , ITURMENDI AGUIRREBEITIA AITZIBER , GONDRA ZUBIETA KOLDO
Published: December 2022

The introduction of polymer matrix composites in large structural parts for aircraft, buses, trains, and wind turbine blades has significantly boosted their efficiency. This is mainly due to the significant reduction in weight, resulting in fuel savings and a reduction on environmental impact. The annual use of these products is around 110.000 tonnes of carbon fibre composite parts and 4.5 million tonnes of glass fibre, with an average lifetime of around 15 years. Nevertheless, it should be noted that these products have high recycling disadvantages. Therefore, due to current environmental legislation, it is necessary to look for more sustainable alternatives, solutions to the waste generated during production, and at the end of life cycle.

Key Words: bio-based composites, sustainable, thermosetting, vitrimers, natural fibres.
ADDITIVE MANUFACTURING TECHNOLOGIES FOR SUSTAINABLE-INTELLIGENT STRUCTURES: A NEW CONCEPT OF MULTIDIMENSIONAL PRINTING
Authors: CAVAS MARTINEZ FRANCISCO , PAREDES MANUEL , GHERARDINI FRANCESCO , GOMEZ GARCIA CARMELO
Published: December 2022

In recent years, additive manufacturing has become a disruptive technology for its ability to build structures with complex geometries. In the future, additive manufacturing will combine multidimensional printing technology with the use of programmable-smart materials, achieving higher levels of structural freedom, sustainability and efficiency in advanced manufacturing processes, ultimately driving the social, economic and environmental impact of this technology.
Evaluation of automated calibration and quality control processes using the Aptio total laboratory automation system
Authors: Kim Namhee , Kim Yein , Park Jeongeun , Choi Jungsoo , Hwang Hyunyong
Published: December 2022

Background: The objective of this study was to determine whether manually performed calibration and quality control (QC) processes could be replaced with an automated laboratory system when installed analyzers fail to provide automated calibration and QC functions.Methods: Alanine aminotransferase (ALT), total cholesterol (TC), creatinine (Cr), direct bilirubin (DB), and lipase (Lip) items were used as analytes. We prepared pooled serum samples at 10 levels for each test item and divided them into two groups; five for the analytical measurement range (AMR) group and five for the medical decision point (MDP) group. Calibration and QC processes were performed for five consecutive days, and ALT, TC, Cr, DB, and Lip levels were measured in the two groups using automated and manual methods. Precision and the mean difference between the calibration and QC methods were evaluated using the reported values of the test items in each group.Results: Repeatability and within-laboratory coefficients of variation (CVs) between the automated system and the conventional manual system in the AMR group were similar. However, the mean reported values for test items were significantly different between the two systems. In the MDP group, repeatability and within-laboratory CVs were better with the automation system. All calibration and QC processes were successfully implemented with the Aptio total laboratory automation system.Conclusion: The Aptio total laboratory automation system could be applied to routine practice to improve precision and efficiency.
Evaluation of Medical Specialization Education Students' Perceptions of Hospital Education Environment and Affecting Factors
Authors: KARADEMİR Mustafa , AĞADAYI Ezgi , KARAHAN Seher , KARADEMİR Dilay
Published: December 2022

Aim: Our aim in this study is to determine the perceptions of medical residency students studying at a university about the hospital education environment and the factors affecting it.

Methods: This was a descriptive study. The population of the research consisted of specialty students studying at Sivas Cumhuriyet University. The research questionnaire was sent to the participants via text message to their personal mobile phone numbers. Informed consent was obtained from the participants on the first page of the survey link sent to them. The data collection tool used in the study included a total of 71 questions. The first part was created by the researchers through literature review and included 31 questions. The other 40 questions were Postgraduate Hospital Educational Environment Measure (PHEEM).

Results: 266 of the 387 residency students in the faculty participated in the survey (Response rate: 68.7%). 79% of residency students studying in medical sciences and 56% in surgical sciences participated in the research. 11.7% (n=23) of residents from medical sciences and 28.6% (n=20) of residents from surgical sciences stated that no seminar hours were held. Postgraduate Hospital Educational Environment Measure mean score of the residency students was found to be 83.6 ± 25.5. The mean score did not differ significantly between departments (p=0.578). Those who thought that there were enough residents and faculty members had higher educational environment measure scores (respectively p=0.010 and p
POLİKİSTİK OVER SENDROMU'NUN ALT GRUPLARINDA METABOLİK ÖZELLİKLER
Authors: YILMAZ Mukaddes , KELEŞTEMUR Fahrettin
Published: December 2022

Amaç: Polikistik over sendromu (PKOS), kronik anovülasyon, adet düzensizlikleri ve hiperandrojenizm ile karakterize heterojen bir hastalıktır. Bu çalışmada revize edilmiş Rotterdam tanı kriterlerine göre PKOS alt gruplarının metabolik özelliklerini karşılaştırmayı amaçladık.

Materyal ve Metod: PKOS'lu 95 kadın çalışmaya dahil edildi ve dört gruba ayrıldı. Grup 1; biyokimyasal hiperandrojenemi ve/veya hiperandrojenizm ile oligomenore ve/veya anovülasyon, grup 2; polikistik over ile biyokimyasal hiperandrojenemi ve/veya hiperandrojenizm, grup 3; polikistik over ile oligomenore ve/veya anovulasyon ve grup 4; polikistik over ile biyokimyasal hiperandrojenemi ve/veya hiperandrojenizm ile oligomenore ve/veya anovulasyon. Çalışmaya alınan tüm hastaların vücut kitle indeksleri (kg/m2) ve bel-kalça oranları hesaplandı. 12 saatlik açlıktan sonra açlık glukozu, lipid düzeyleri, böbrek ve karaciğer fonksiyon testleri ölçüldü. Glukoz ve insülin yanıtlarını değerlendirmek için oral glukoz tolerans testi (OGTT) yapıldı. Adet döngüsünün foliküler fazında hormon seviyeleri ölçüldü. Adrenal ve over hiperandrojenemisini değerlendirmek için adrenokortikotropik hormon (ACTH) (0,5 mg Synacthen IM) ve gonadotropin salgılatıcı hormon agonisti (buserelin) testleri yapıldı. PKO morfolojisini tanımlamak için tüm çalışma hastalara ultrasonografi yapıldı.

Bulgular: Klasik PKOS fenotipinin sıklığı, klasik olmayan PKOS fenotipinden daha yüksekti (sırasıyla %74,7 ve %25,2). Vücut kitle indeksleri, bel-kalça oranları tüm gruplarda benzerdi. Serum trigliserit düzeyleri grup 2'de diğer gruplara göre anlamlı olarak düşük bulundu (p< 0.01). Pik insülin ve AUC insülin seviyeleri grup 2'de anlamlı olarak düşüktü (p< 0.05). Bozulmuş açlık glukozu ve bozulmuş glukoz toleransı prevalansı tüm gruplarda benzerdi. Serbest testosteron ve androstenedion düzeyleri grup 3'te grup 4'e göre anlamlı olarak düşüktü.

Sonuç: Hiperandrojenizmi olmayan PKOS'lu hastaların (OA+PCO; grup 3) metabolik bozuklukları beklenenin aksine klasik PKOS gruplarına benzerdi. Menstrüel disfonksiyonu olmayan PKOS'lu hastalarda (HA+PCO; grup 2) saptanan metabolik bozuklukların lipid düzeyleri ve insülin direnci açısından daha ılımlı olduğu saptandı. Bu bulgular yeni gelişen HA+PKO ve OA+PKO gruplarının geniş PKOS spektrumunun bir parçası olduğunu ve PKO morfolojisinin PKOS tanı kriterlerinden biri olduğunu desteklemektedir.
La mediación lingüística y cultural: de la teoría a la práctica en el aprendizaje de español como lengua extranjera
Authors: Mendizábal de la Cruz Nieves
Published: December 2022

Los nuevos tiempos en los que estamos inmersos nos han hecho replantearnos muchas cuestiones sobre las competencias que deben adquirir los aprendices de lenguas extranjeras. En este trabajo revisaremos aspectos relativos a la definición de mediación, las diferencias entre mediar y traducir, contrastes entre mediación lingüística y cultural, cómo se contemplan las estrategias de mediación en el proceso de enseñanza/aprendizaje de segundas lenguas y cuál es su ámbito de aplicación. Defenderemos la necesidad de ampliar el concepto de competencia comunicativa y de abordar la enseñanza de segundas lenguas desde enfoques metodológicos más complejos, incluyendo habilidades mediadoras en el aprendizaje del español como lengua extranjera. Los resultados del estudio sobre mediación concluyen con la necesidad de implementar subcompetencias orales y escritas en los aprendices de ELE y para ello se ofrecen diversas propuestas didácticas.
La novela gráfica como recurso didáctico en tiempos de pandemia: una propuesta intercultural para dinamizar la asignatura de Conversación del Grado en Filología Hispánica de la R. P. China
Authors: Manzanares Triquet Juan Carlos , Capperucci Davide
Published: December 2022

El azote pandémico ha marcado un implacable punto de inflexión en la escena educativa. Concretamente, en la R. P. China, contexto en el que se inserta la presente experiencia, la docencia en línea ha pasado a ser la tónica de una parte significativa del profesorado hispanohablante sin opción de regreso. Dicha coyuntura, además de dificultar la enseñanza de una asignatura eminentemente comunicativa como Conversación, plantea la imperiosa necesidad de redefinir el proceso didáctico al abrazo de propuestas que, por un lado, comulguen con la identidad del alumnado meta y, por otro, estimulen su participación activa en el aula virtual.
El presente artículo contextualiza y desgrana la propuesta desarrollada entre los aprendientes de segundo año del Grado en Filología Hispánica a través de una propuesta vertebrada alrededor de dos grandes ejes: novela gráfica y la aplicación ComicLife3.
PHOTOCATALYTIC ACTIVITY OF ZnO AND TiO2 TOWARDS EFFECTIVE DEGRADATION OF CEFOPERAZONE
Authors: Savanović Maria M. , Vukojević Andrijana , Marković Dragana , Armaković Stevan , Pelemiš Svetlana , Armaković Sanja J.
Published: December 2022

Cefoperazone belongs to the third generation of cephalosporin antibiotics. It is accumulated in water due to its overuse and causes bacterial, environmental, and health issues. In this work, the efficiency of photocatalytic degradation of cefoperazone was studied using different types of radiation (simulated solar, UV, and LED) in the presence of different nanomaterials (ZnO and TiO2). First, the photolytic degradation of cefoperazone was examined, where UV radiation showed as most effective for cefoperazone degradation, wherein 29.5% of cefoperazone was degraded after 60 min. Photocatalysis in the presence of TiO2 leads to complete removal of cefoperazone after 30 min, while the use of ZnO leads to complete photocatalytic degradation of cefoperazone after 20 min using UV radiation. Simulated solar and LED radiation showed slightly lower efficiencies. When TiO2 was applied, the removal efficiency was around 60%, while approximately 70% of cefoperazone was degraded when ZnO was used.
A REVIEW OF RECENT DEVELOPMENT OF THE SOLVENT-DEFICIENT METHOD
Authors: Zeljković Saša
Published: December 2022

The challenges of modern society and the requirements for high-tech materials have led to a new stage in the development of chemical synthesis methods. This stage is demanding a reliable, controllable, and green approach to the production of necessary materials. One of the recently developed approaches for metal oxide nanoparticles synthesis is the solvent deficient method. A cutting edge of this synthetic method is a synthesis with increased control throughout chemical transformation resulting in optimal conditions for materials production. As a result, oxide nanoparticles are produced fast, environmentally friendly, cost-effective, and with low energy consumption. On the other hand, a complex reaction mechanism is presenting a challenge for reliable kinetic studies. The present review follows the recent trends in the development of the solvent deficient method concerning the binary, ternary, and complex metal oxides. Special attention is given to considering approaches responsible for desirable mechanisms of catalytic applications. In future development, the reported synthesis method is expected to be employed in a high entropy oxides formation. Due to simple preparation steps, it will be possible to automatize the reaction procedure and investigate a large number of possible compositions which is imperative for new complex materials. Finally, precursors heating could be transformed from conventional to microwave. Solvent-deficient method deals with precursors sensitive to microwave irradiation which could ensure rapid heating and transformation to desirable oxide nanomaterials.
COMPUTER AIDED DIAGNOSTIC SYSTEM FOR WHOLE SLIDE IMAGE OF LIQUID BASED CERVICAL CYTOLOGY SAMPLE CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORK
Authors: Hut Igor , Jeftic Branislava , Dragicevic Aleksandra , Matija Lidija , Koruga Djuro
Published: December 2022

Cervical cancer screening with Papanicolaou test and liquid based cytology relies on the expertise of the pathologist. Liquid based cytology is proven to be more efficient than conventional Papanicolaou test when it comes to sample preparation and possibility of conducting several tests on the same sample. However, specificity and sensitivity of the test are in the range of the Papanicolaou test accuracy metrics, with false negative results still being the main drawback of these manually performed tests. Advances in technology and availability of digital data have enabled succesfull application of machine learning models in diagnostics. Images of cervical cells are now used as input to different deep learning models currently tested in studies concerning computer aided diagnostic systems. This study explores different architectures of convolutional neural network for cervical cancer detection based on Optomagnetic imaging spectroscopy and liquid based cytology samples. The proposed VGG16 based model achieved 93.3% sensitivity and 67.8% specificity in the binary classification problem. Results highlight the need for more balanced dataset in order for suggested deep model to achieve better performance.
NANOCAPSULES BASED ON PLANT PROTEINS
Authors: Rajić Danijela , Vuković Srđan , Vuković Aleksandar , Gojković Cvjetković Vesna , Pelemiš Svetlana
Published: December 2022

Recently, nanobiotechnology has a very wide range of applications, and one of them is the application of nanoparticles for delivery systems of active substances. Nanoparticles are one of the most unique entities that enhance performance, expand applications, and provide an opportunity to develop materials that can address many scientific challenges. Hollow nanoparticles-nanocapsules built from plant proteins have suitable physico-chemical and functional properties, which enable them to encapsulate hydrophilic and hydrophobic bioactive compounds. Apart from their essential function of providing amino acids for human consumption, proteins also play a prominent role in the preparation, processing, storage and consumption of food and contribute to the quality and sensory properties of food products. The development of nanoparticles with specific properties is encouraged by their application in nanotechnology, food and agricultural systems, especially the development of bioactive components of functional food, with improved solubility, physico-chemical stability, oral bioavailability and sensory characteristics. This paper provides an overview of plant proteins that can be used for the production of nanocapsules, their functional properties, as well as the methods that can be used to obtain nanocapsules based on plant proteins.