bluuebunny/crossref_metadata_2025 huggingface dataset:
Antiretroviral Therapy and Bone Health
Authors: Yancheva N. , Temelkova N. , Strashimirov D. , Gabarska I. , Tchervenyakova T.
Published: March 2019

Objective: To determine the incidence of osteopenia and osteoporosis in Bulgarian human immunodeficiency virus (HIV)-infected patients.

Methods: Bone mineral density (BMD) was measured by dual-energy X-ray absorptiometry in 41 Bulgarian HIV-infected patients.

Results: Overall, 27% of patients had reduced BMD (7% osteoporosis and 20% osteopenia). There was a significant correlation between low BMD and increasing age and between low BMD and duration of antiretroviral therapy (ART) but no correlation with gender, therapy regimen or serum calcium or phosphate levels. Seventy-one percent had elevated serum cystatin C levels but there was no correlation between BMD and cystatin C levels. Serum calcium, phosphate, cystatin C and creatinine levels and the T- and Z-scores were tested for dependence on duration of therapy. Dependence was found for T- and Z-scores, (p = 0.048 and p = 0.038) but not for calcium, phosphate, cystatin C or creatinine levels. These variables were subsequently tested by means of cross-tabulation tables for correlations between pairs of parameters; no significant correlation was found between any pairs (R > 0.5 for all comparisons).

Conclusions: Significant correlations were observed between low BMD and increasing age and longer duration of ART but no relationship was observed with gender or therapy regimen.
Lipid Indices, Elastin Turnover and the Development of Microvascular Complications – A Study in Diabetic Patients with Arterial Hypertension
Authors: Nikolov A. , Blazhev A. , Tzekova M. , Kostov K. , Popovski N.
Published: March 2019

Background and Aims: An important factor in the development of vascular wall lesions is the degradation of the elastic fiber major protein – elastin. Elastin peptides (EDP) derived from this degradation are present in the circulation and are a stimulus for the production of anti-elastin antibodies (AEAbs) IgM, IgG and IgA. The aim of this study was to investigate the possible association between AEAbs, lipid indices and the development of microvascular complications.

Material and Methods: Sera of 93 patients with type 2 diabetes mellitus (T2DM) and arterial hypertension (AH) were investigated (mean age 61,4 ± 11,3 years, diabetes duration 9,88 ± 3,12 years; hypertension duration 9,28 ± 4,98). ELISA was used for determination of anti-elastin antibodies. These levels were compared to serum AEAbs in 42 age- and sex-matched controls. Diabetic patients were divided in two groups according to the presence – Group 1 (n = 67) or absence – Group 2 (n = 26) of microangiopathy. The lipid profile and lipid indices (log TG/HDL, LDL/HDL, TC/HDL and TG/HDL) were also studied.

Results: Patients with T2DM and AH showed statistically significant higher levels of serum AEAbs IgA than healthy controls – 0,338 (0,133÷0,452) vs. 0,006 (0,052÷0,068) (KW = 19,54; P < 0.0001). Group 1 showed statistically significant higher levels of AEAbs IgA than patients without microangiopathy – 0,353 (0,173÷0,471) vs. 0,235 (0,098÷0,377) (KW = 3,36; p = 0.05) and healthy controls – 0,353 (0,173÷0,471) vs. 0,006 (0,052÷0,068) (KW = 20,37; p < 0,0001) (0.37 ± 0,03 vs. 0.06÷0.01) (p = 0.0001). Patients from Group 2 showed significantly higher levels of AEAbs IgA than controls 0,235 (0,098÷0,377) vs. 0,006 (0,052÷0,068) (KW = 8,54; P = 0.003). AEAbs IgA showed correlation with insulin dose (r = −0.35); (p = 0.01), SBP (r = 0.31); (p = 0.001), HbA1c (r = 0.21); (p = 0.04), BMI (r = 0.22); (p = 0.01). AEAbs IgA correlated with log TG/HDL (r = 0.28); (p = 0.001), LDL/HDL (r = 0.22); (p = 0.01) TC/HDL (r = 0.22); (p = 0.01) and with TG/HDL (r = 0.15); (p = 0.05).

Conclusion: Our study proved a relationship between elevation of AEAb IgA, high lipid indices and the development of microvascular complications in patients with type 2 diabetes mellitus and arterial hypertension.
Application of Positive End-Expiratory Pressure (PEEP) in Patients During Prolonged Gynecological Surgery
Authors: Koritarova V. , Georgiev S.
Published: March 2019

Introduction: A lot of clinical studies have shown that during prolonged surgery protective ventilation strategy, including low tidal volume, PEEP and recruitment maneuvers (RM) can reduce the rate of postoperative pulmonary complications, which are the second most common cause for postoperative mortality. Therefore, it is important to investigate clinical methods for preventing them. The strategy of protective ventilation is easy and safe for the patients and inexpensive for application during prolonged surgery.

Aims: The objective of this trial was to study whether application of PEEP in patients during prolonged gynecological surgery could decrease the postoperative complications.

Material and Methods: We compared the rates of postoperative complications in patients after prolonged open gynecological surgery, who were divided into 2 groups – group A, which was the control group on non-protective ventilation (35 patients) and group B on protective ventilation (35 patients). The patients in the control group were ventilated with tidal volume (VT) of 8-10 ml/kg without PEEP and RM; the patients in group B were ventilated with VT = 6-8 ml/kg according to their Predicted Body Weight, with a PEEP of 6 cm H2O and RM, which consisted of applying continuous positive airway pressure of 30 cm H2O for 30 seconds. RM was performed after intubation, after every disconnection from ventilator and before extubation. The study was successfully performed without a need for a change in the type of ventilation strategy because of hypoxia or hemodynamic instability. Statistical nonparametric test (e.g. chi-square) was applied.

Results: Total rate of all postoperative complications observed in both groups was 27,1%. We found a significant relationship between application of PEEP and lower rates of postoperative pulmonary complications in group A (39,4%) compared to group B (12,1%), lower rate of respiratory failure (33,3% in group A vs. 9,1% in group B -) and atelectasis (21,2% in group A vs. 0% in group B).

Conclusion: The protective ventilation strategy (low VT, PEEP and RM) in patients during prolonged gynecological surgery can reduce the rate of postoperative pulmonary complications such as respiratory failure and atelectasis.
Physical Activity and Gastrointestinal Cancer Risk: A Review
Authors: Tajabadi Z. , Akbari M. E. , Hafez A. A.
Published: March 2019

Introduction: Western lifestyle characterized by increased consumption of red meat, fat, processed food, smoking, alcohol drinking, lower consumption of vegetables and physical inactivity has been associated with a higher gastrointestinal cancer risk. Digestive system cancers are diagnosed at late stages when they show poor response to treatment and are associated with a high mortality rate. Colorectal, gastric, esophageal and pancreatic cancers are among the most common cancers worldwide. Studies show that more than 50% of gastrointestinal cancers develop as a result of inappropriate lifestyle. An inverse association between physical activity and many chronic diseases has been proved so far. However, the association between physical activity and some gastrointestinal cancers is still controversial. This study was aimed to determine the association between physical activity and gastrointestinal cancers risk.

Methods: We conducted a comprehensive search of English and Persian databases from February 2007 till December 2017, for studies investigating the association of physical activity and risk of gastrointestinal cancers. Finally, after reading full text of articles, 123 studies were included.

Results: Physical activity can be helpful in reducing the risk of gastrointestinal cancer, especially colon and pancreatic cancers. The risk reduction is not similar for different types of gastrointestinal cancers and also among males and females.

Conclusion: Different types of physical activity are associated with a lower risk of gastrointestinal cancer. However, it is unknown which type and intensity of physical activity are associated with a protective effect against gastro-intestinal cancer.
A directional measure for marginal homogeneity in square contingency tables with ordered categories
Authors: Iki Kiyotaka , Nakano Hiroshi , Tomizawa Sadao
Published: March 2019

For square contingency tables with ordered categories, Iki, Tahata and Tomizawa (2012) considered a measure to represent the degree of departure from marginal homogeneity. However, the maximum value of this measure cannot distinguish two kinds of marginal inhomogeneity. The present paper proposes a measure which can distinguish two kinds of marginal inhomogeneity. In particular, the proposed measure is useful for representing the degree of departure from marginal homogeneity when the marginal cumulative logistic model holds.
On modeling and analyzing barley malt data in different years
Authors: Mejza Iwona , Ambroży-Deręgowska Katarzyna , Bocianowski Jan , Błażewicz Józef , Liszewski Marek , Nowosad Kamila , Zalewski Dariusz
Published: March 2019

The main purpose of this study was the model fitting of data deriving from a three-year experiment with barley malt. Two linear models were considered: a fixed linear model with fixed effects of years and other factors, and a mixed linear model with random effects of years and fixed effects of other factors. Two cultivars of brewing barley, Sebastian and Mauritia, six methods of nitrogen fertilization and four germination times were analyzed. Three quantitative traits were observed: practical extractivity of the malt, malting productivity, and a quality coefficient Q. The starting point for the statistical analyses was the available experimental material, which consisted of barley grain samples destined for malting. The analyses were performed over a series of years with respect to fixed or random effects of years. Due to the strong differentiation of the years of the study and some significant interactions of factors with years, annual analyses were also carried out.
Ensuring Freedom of Labor in Ukraine in the Context of Labor Emigration
Authors: Inshyn Mykola , Moskalenko Olena
Published: March 2019

The article is devoted to substantiating the necessity of using existing tools and means of labor law science in certain aspects of labor migration, particularly, concerning the provision of labor freedom for Ukrainian workers - labor emigrants. The integrated approach to the development of methodological foundations for such provision and the development of relevant legal provisions at various stages of realization of a person’s right to labor, as well as in part of ensuring the prohibition of compulsory labor, can qualitatively raise the level of legal regulation of labor migration through the inclusion of labor law science. In support of its argument the article provides a wide range of statistical data on Ukrainian labor emigration. It is determined that the existing problems of Ukrainian labor emigration in the context of ensuring freedom of work can be systematized at the stages of their occurrence in the following way: 1) before the emergence of labor relations with a foreign employer, that is, as long as a Ukrainian citizen is still in Ukraine and acts for the purpose of employment abroad; 2) the emergence of labor relations with a foreign employer, that is, the legal registration of such relationships; 3) the actual beginning of labor relations outside Ukraine, the course of labor relations and the presence of a Ukrainian labor emigrant in them; 4) termination of labor relations of the Ukrainian labor emigrant and return to the territory of Ukraine. The emergence of labor disputes is the optional stage.
Fatigue Within the EU’s Eastern Partnership: The EU Role in the “Neighbourhood Of Crisis”
Authors: Rakutienė Sima
Published: March 2019

Since 2004, when the European neighbourhood policy was established, the European Union has already spent billions of euros to finance the new neighbourhood policies for creating more stable and more cooperative relations with eastern and southern neighbours. However, increased security concerns and challenges, less stable and less prognostic relations seem to have produced the opposite result of what was sought, and so Europe is experiencing a “neighbourhood of crisis”. Did it fail? What strategy has the EU been using within the last 15 years in relations with its neighbouring countries? What specific tools and instruments have been adapted? Did the renewal of European neighbourhood policy introduce any completely new strategic elements? This article examines these questions, focusing on three perspectives suggested by role theory: intentional, interactional and institutional. The study applies qualitative research methodology and claims that the EU has been seeking to transmit not just EU values and standards but also internal institutional practices and modes of EU governance.
Economic Scheduling of Microgrid Based on Energy Management and Demand Response
Authors: Chamandoust Heydar
Published: March 2019

Currently, microgrids are regarded one of the main substations in distribution networks that generate electrical energy locally. The advantages of microgrids include easy management, optimization, and highly reliable supply. In this paper, the recommended model is based on economic and emission optimal scheduling in connection to the main grid mode; implementation model implies the short-term mode with optimal operation units and the use of real-time pricing (RTP) plan. In this study, a multi-objective function for operating costs and emission with the augmented ɛ-constraint method has been considered; fuzzy decision-making process has been employed to obtain the best solution. In addition, it has been considered that a microgrid has interruptible and shiftable loads that can participate in demand response programs. The presented results have been evaluated based on different demand response programs.
Appropriateness of Numbers of Receptive Fields in Convolutional Neural Networks Based on Classifying CIFAR-10 and EEACL26 Datasets
Authors: Romanuke Vadim
Published: March 2019

The topical question studied in this paper is how many receptive fields (filters) a convolutional layer of a convolutional neural network should have. The goal is to find a rule for choosing the most appropriate numbers of filters. The benchmark datasets are principally diverse CIFAR-10 and EEACL26 to use a common network architecture with three convolutional layers whose numbers of filters are changeable. Heterogeneity and sensitiveness of CIFAR-10 with infiniteness and scalability of EEACL26 are believed to be relevant enough for generalization and spreading of the appropriateness of filter numbers. The appropriateness rule is drawn from top accuracies obtained on 10 × 20 × 21 parallelepipeds for three image sizes. They show, knowing that the number of filters of the first convolutional layer should be set greater for the more complex dataset, the rest of appropriate numbers of filters are set at integers, which are multiples of that number. The multipliers make a sequence similar to a progression, e.g., it may be 1, 3, 9, 15 or 1, 2, 8, 16, etc. With only those multipliers, such a rule-of-progression does not give the number of filters for the first convolutional layer.
Methane emissions and demethanation of coal mines in the Upper Silesian Coal Basin between 1997 and 2016
Authors: Dreger Marcin , Kędzior Sławomir
Published: March 2019

Between 1997 and 2016 we observed important changes in hard coal extraction and methane emission in the Upper Silesian Coal Basin. Hard coal extraction in the near future will be very dangerous because it will be necessary to reach deeper methane-rich coal seams. Permanent monitoring of the volume of emitted and captured methane is necessary to combat the methane hazard. The predictability of gaseous hazards are important in order to keep underground work safe. We gathered and analysed data from three coal companies: Katowice Coal Holding, the Coal Company, Jastrzębie Coal Company and in the whole of the Upper Silesian Coal Basin for the last twenty years and this allowed us to notice changes and CH4 trends in ventilation emission and demethanation. There is a decrease in the extraction of hard coal from year to year. At the same time there is an increase in the total methane emissions which forces actions aimed to effective contracting the methane hazard. Specifically, methane emission has been increasing for years, making hard coal extraction very dangerous. We observed increases in CH4 vent emission and volume of methane coming from underground drainage systems. Much more methane is released during hard coal extraction at deeper mine levels. Throughout the entire research period the methane hazard increased. Therefore, the development of modern technologies for methane capturing should contribute to improvement of hazardous conditions for coal mining in the basin.
Landscape transformations in the alluvial fan of the River Little Vistula (Mała Wisła) in Poland from the 18th century to the present
Authors: Czaja Jakub
Published: March 2019

Development within the River Little Vistula valley undoubtedly started at the very beginnings of the Polish state. At that stage, human activity focused on finding and adapting sites that were suitable for permanent settlement and also on utilising the resources found in the valley and afforded by the river such as fishing and shipping opportunities. The shape of the River Little Vistula alluvial fan also allowed the construction of numerous canals branching from the river channel, on which mills, fulleries and sawmills were established. The characteristics of the landscape changes which have taken place in the study area have been presented on the basis of analyses of large-scale (1:28,800) topographic maps from the mid-18th and 19th centuries, modern topographic maps and also from visits to the study area (General-Mappa des Merzogthums Ober-Schleisien 1763–1764 and Übersicht der Militar Aufmahme von Mähren und Schlesien, 1839-1840). It was found that landscapes of the River Little Vistula alluvial fan are “landscapes of valleys and plains subject to water accumulation and floods”. Such areas are characterised by the presence of groundwater at low depths and are subject to periodic flooding by river waters, which are rich in mineral substances. Their habitats include riparian forests and flood meadows, which have often been transformed into arable fields. Characteristic types of soils in these areas include alluvial soils and peats, and typical elements of the landscape are water bodies, mainly fish ponds.
Marketing Quality of Texts Posted on the Websites of Rural Tourism Facilities in Poland
Authors: Król Karol
Published: March 2019

Subject and purpose of work: The subject of the research were texts published on the websites of rural tourism facilities in Poland, and the purpose of the work was to assess their marketing quality.

Materials and methods: The evaluation of the marketing quality of the texts was carried out using the web application Audyt Hekko (Blink) on a collection of 842 websites of rural tourism facilities.

Results: Texts with a low (poor) marketing utility (as assessed by the testing algorithm) were found on 362 websites, which constituted approximately 44% of the set. Approximately 46.5% of the websites contained texts whose marketing utility was sufficient. Texts posted on 10% of the analysed websites were rated as useful for marketing.

Conclusions: The semantic evaluation of the texts published on most rural tourism facilities websites has shown that they have been written in the language of benefits, with the use of phrases that may arouse interest and curiosity. At the same time, however, they required optimization and a greater marketing orientation.
Public and Private Lives: Judith Butler’s Grief and the Loss of Black Self
Authors: Maze Jacob
Published: March 2019

By looking at Butler’s theories on grief and mourning, I focus on her concept of ecstasy, or the state of being outside of one’s self, which illustrates the dependency individuals have on social norms as well as the vulnerability such a system of recognition entails. Using this framework, I discuss how the private and the public spheres can construct public bodies. If this happens, individuals can have little say over how their bodies are socially signified. To show this, I use the case of Black women in the USA, where systemic oppression constantly draws their bodies into the public’s eye.
Analysis of a Chemically Reactive Mhd Flow With Heat and Mass Transfer Over a Permeable Surface
Authors: Fenuga O.J. , Aroloye S.J. , Popoola A.O.
Published: March 2019

This paper investigates a chemically reactive Magnetohydrodynamics fluid flow with heat and mass transfer over a permeable surface taking into consideration the buoyancy force, injection/suction, heat source/sink and thermal radiation. The governing momentum, energy and concentration balance equations are transformed into a set of ordinary differential equations by method of similarity transformation and solved numerically by Runge- Kutta method based on Shooting technique. The influence of various pertinent parameters on the velocity, temperature, concentration fields are discussed graphically. Comparison of this work with previously published works on special cases of the problem was carried out and the results are in excellent agreement. Results also show that the thermo physical parameters in the momentum boundary layer equations increase the skin friction coefficient but decrease the momentum boundary layer. Fluid suction/injection and Prandtl number increase the rate of heat transfer. The order of chemical reaction is quite significant and there is a faster rate of mass transfer when the reaction rate and Schmidt number are increased.
Perturbation Solutions For Magnetohydrodynamics (Mhd) Flow of in a Non-Newtonian Fluid Between Concentric Cylinders
Authors: Yürüsoy M. , Güler Ö.F.
Published: March 2019

The steady-state magnetohydrodynamics (MHD) flow of a third-grade fluid with a variable viscosity parameter between concentric cylinders (annular pipe) with heat transfer is examined. The temperature of annular pipes is assumed to be higher than the temperature of the fluid. Three types of viscosity models were used, i.e., the constant viscosity model, space dependent viscosity model and the Reynolds viscosity model which is dependent on temperature in an exponential manner. Approximate analytical solutions are presented by using the perturbation technique. The variation of velocity and temperature profile in the fluid is analytically calculated. In addition, equations of motion are solved numerically. The numerical solutions obtained are compared with analytical solutions. Thus, the validity intervals of the analytical solutions are determined.
Rola Avarského Kaganátu Pri Vzniku Slovenčiny
Authors: Braxatoris Martin , Ondrejčík Michal
Published: March 2019

The paper proposes a basis of theory with the aim of clarifying the casual nature of the relationship between the West Slavic and non-West Slavic Proto-Slavic base of the Slovak language. The paper links the absolute chronology of the Proto-Slavic language changes to historical and archaeological information about Slavs and Avars. The theory connects the ancient West Slavic core of the Proto-Slavic base of the Slovak language with Sclaveni, and non-West Slavic core with Antes, which are connected to the later population in the middle Danube region. It presumes emergence and further expansion of the Slavic koiné, originally based on the non-West Slavic dialects, with subsequent influence on language of the western Slavic tribes settled in the north edge of the Avar Khaganate. The paper also contains a periodization of particular language changes related to the situation in the Khaganate of that time.
Lexikálny Význam V Recepcii
Authors: Dolník Juraj
Published: March 2019

Asking first about how the lexical meaning manifests itself as we experience it in a communicative event, the author explores the background of the ways in which we are able to perceive the meaning of words in texts. One useful way of thinking about how recipients react to the words in utterances is in terms of behavioural and actional lexical meaning. The first refers to the understanding of meaning, the second corresponds to interpretations of words when the recipient does not succeed in the process of natural understanding of words. These terms lead to questions about the rationality of language. One aspect of this rationality is the function of the intentional­emergent mechanism that adjusts the interplay of automatic and deliberate use of language. This mechanism has its roots in the fundamental human nature: we are behavioural­actional beings. Pragmatic analysis sheds light on how hearers understand and interpret what they hear with regard to their conceptual knowledge associated with words.
Lexéma Hrať V Trénerskom Komunikačnom Registri – K Vymedzeniu Registrovo Motivovaného Významu
Authors: Slančová Daniela , Slančová Terézia Kovalik
Published: March 2019

The study analyses the meaning and usage of the lexeme hrať [‘to play’] in coach register of the volleyball coaches coaching girls and boys of older school age. Theoretically, it is based on the theory of sports games, theory of communication register, theory of lexical motivation and complex concept of meaning without strict borders between semantics and pragmatics. Empirically, it is based on the analysis of tri­modal (audiovisual­graphical) corpus of the speech of two volleyball coaches (one of a girls team, one of a boys team), each of three training units and three games (50 917 tokens). The concept of register motivated meaning is explained. While analysing meaning of the lexeme hrať and its collocations (116 types of collocations), the author goes from the general meaning of the lexies (hrať 1 = to do a sports activity; hrať 2 = to present a sports performance), through its context specification to its situational actualization.
K Dynamike Štylistiky Slovnej Zásoby V Súčasnej Online Mediálnej Produkcii Názorového Typu
Authors: Patráš Vladimír
Published: March 2019

The paper is aimed at nature, manifestation and mutual relation of two contradictory trends in alternative online periodicals with opinion­based articles (i.e. articles expressing authors’ opinions). On the one hand, the persuasive function of articles, aimed at shaping readers’ opinions, changes to pretend, change or cover the substance of a topic, usually on the edge of manipulation. This effect is reached by: a) gradation of emotions and usage of stylistically marked lexemes, b) shifts in meaning behind a common or presupposed context, c) preferring occasionalisms, d) deliberate desemantization of lexemes, e) revitalisation of semantics and stylistics of lexemes moving between the centre and the periphery of the lexicon. On the other hand there are also articles containing notional, unmarked and neutral words as basic words. Their function is to strengthen informative basis of articles. In order to reach a persuasive effect, both contradictory trends support an activity of competitive and cooperative relations. Lexicon of analysed articles becomes a vehicle for collision of persuasive and informative functions – the source of genre syncretism in media communication sphere. Research corpus consists of articles belonging to the rational type of journalism, appearing in internet alternative periodicals aimed at major geopolitical conflicts and related to crisis situation or crisis communication sphere. They cover especially public events, heated events and confrontation in the context of international political communication usually with the evidence or manifestation of geopolitical power. The corpus for stylistic analysis, interpretation and generalisation includes selected Slovak alternative online and opinion based periodicals.
Posesivní Genitiv Redivivus
Authors: Uličný Oldřich
Published: March 2019

In the contemporary Czech, in both spoken and especially in written form, possessive adjectives are replaced by possessive genitives, which are originally colloquial constructions only. In the last stage of this development, the postpositive genitive changes into prepositive: Klárčina maminka, maminka Klárky, Klárky maminka (‘Klárka’s mother’). The Czech language thus loses another means of inflection and gets closer to an agglutinative language type. This change (deflective tendency) is also supported by the loss of introflexion, i.e. the loss of morphophonological alternations, in our example k – č, in other cases r – ř, g – ž, ch – š, etc. (Klárčin – Klárky [‘Klárka’s’], sestra – sestřin [‘sister’s’], Olga – Olžin [‘Olga’s’] etc.).
Klára Buzássyová V Kontexte Sémantizácie Slovenskej Lexiky Cudzincom
Authors: Pekarovičová Jana
Published: March 2019

This paper deals with the characteristics of the scientific research of the renowned Slovak linguist Klára Buzássyová who – as a lecturer at the Studia Academica Slovaca summer school of Slovak language and culture – presented to foreign students the specifics of Slovak lexis and their function in speech within the context of intraand interlingual relationships. In her lectures, she helped students to see Slovak as a developped and modern Central European language which has its own genetic and typological properties and as a language capable of reacting to dynamic changes emerging from the communication needs of language users while respecting current trends in European language policy. Klára Buzássyová presented students with the latest results of her linguistic research and discussed the issues regarding the dynamics of vocabulary with an emphasis on the methods of wordformation, motivation, and the impact on the semantic and stylistic value of lexical units. Her papers, published in the Studia Academica Slovaca proceedings from 1980 to 2001 presented her scientific orientation and became an inspiration for the linguistic and didactic conception of Slovak as a foreign language in the context of the development of Slovak studies in Slovakia as well as abroad.
Preliminary studies on the use of Fenton reagent to reduce pollution from wastewater from the production of household chemicals
Authors: Malarski Maciej , Czajkowska Justyna , Nowak Piotr
Published: March 2019

Industrial sewage from the production of household chemicals contain large amounts of impurities in the form of ionic and non-ionic surfactants, detergents, active extenders, enzymes. The mixture of these components means that the reduction of pollutants from this type of waste-water is very burdensome. The article presents the results of preliminary laboratory tests of the possibility of using Fenton reaction in the reduction of pollution in wastewater from the household chemistry industry. The reduction of impurities was determined by the concentration of COD. The tests were carried out on samples of wastewater taken from an industrial wastewater treatment plant from the production of household chemistry. A pollution reduction of 24.7–32.3% was achieved. On the basis of the preliminary tests carried out, the need to better match the doses of reagents to carry out pollution reduction was determined. Despite obtaining values exceeding the limit values for introducing this type of sewage into the sewage system and into the environment, the conducted tests can be considered as prognostic. To compare the process carried out on industrial waste-water, a reduction of impurities was carried out using the Fenton reagent in the standard phenol solution.
An Analysis of the Effectiveness of Interest Rates to Facilitate Price Stability and Economic Growth in South Africa
Authors: Meyer Danie Francois , Chipeta Chama , Camel Richard Thabang Mc
Published: March 2019

Price stability supports accelerated economic growth (GDP), thus the main objective of most central banks is to ensure price stability. The South African economy is experiencing a unique monetary policy dilemma, where a high inflation rate is accompanied by high interest rates and low GDP. This is an unconventional monetary policy scenario and may hold strenuous repercussions for the South African economy. This dilemma was held as the rationale behind this study. The study investigated the effectiveness of the use of the repo rate as an instrument to facilitate price stability and GDP in South Africa. Long-run, short-run and casual relationships between interest rates, inflation and GDP were therefore analyzed. The methodology is based on an econometric process which included a Johansen co-integration test, with a Vector Error Correction model (VECM). Casual relationships were also tested using Granger causality tests. Results of the Johansen Co-integration test indicated the presence of co-integrating long-run relationships between the variables and a significant and negative long-run relationship between the repo rate and inflation rate was revealed, whereas GDP and inflation rate exhibited a significant and positive long-run relationship. The study also found short-run relationships between inflation and GDP, but not for inflation and the repo rate. Further areas of potential research may fixate towards the assessment of other significant alternative policy tools which may be utilized by various countries’ monetary policy authorities to influence supply specific inflationary pressures led by the cost-push phenomena, especially in the short-run.
Convergence of the Numerical Scheme for Regularised Riemannian Mean Curvature Flow Equation
Authors: Tibenský Matúš , Handlovičová Angela
Published: March 2019

The aim of the paper is to study problem of image segmentation and missing boundaries completion introduced in [Mikula, K.—Sarti, A.––Sgallarri, A.: Co-volume method for Riemannian mean curvature flow in subjective surfaces multiscale segmentation, Comput. Vis. Sci. 9 (2006), 23–31], [Mikula, K.—Sarti, A.—Sgallari, F.: Co-volume level set method in subjective surface based medical image segmentation, in: Handbook of Medical Image Analysis: Segmentation and Registration Models (J. Suri et al., eds.), Springer, New York, 583–626, 2005], [Mikula, K.—Ramarosy, N.: Semi-implicit finite volume scheme for solving nonlinear diffusion equations in image processing, Numer. Math. 89 (2001), 561–590] and [Tibenský, M.: VyužitieMetód Založených na Level Set Rovnici v Spracovaní Obrazu, Faculty of mathematics, physics and informatics, Comenius University, Bratislava, 2016]. We generalize approach presented in [Eymard, R.—Handlovičová, A.—Mikula, K.: Study of a finite volume scheme for regularised mean curvature flow level set equation, IMA J. Numer. Anal. 31 (2011), 813–846] and apply it in the field of image segmentation. The so called regularised Riemannian mean curvature flow equation is presented and the construction of the numerical scheme based on the finite volume method approach is explained. The principle of the level set, for the first time given in [Osher, S.—Sethian, J. A.: Fronts propagating with curvature-dependent speed: Algorithms based on Hamilton-Jacobi formulations, J. Comput. Phys. 79 (1988), 12–49] is used. Based on the ideas from [Eymard, R.—Handlovičová, A.– –Mikula, K.: Study of a finite volume scheme for regularised mean curvature flow level set equation, IMA J. Numer. Anal. 31 (2011), 813–846] we prove the stability estimates on the numerical solution and the uniqueness of the numerical solution. In the last section, there is a proof of the convergence of the numerical scheme to the weak solution of the regularised Riemannian mean curvature flow equation and the proof of the convergence of the approximation of the numerical gradient is mentioned as well.
Is Differential Evolution Rotationally Invariant?
Authors: Zámečníková Hana , Einšpiglová Daniela , Poláková Radka , Bujok Petr
Published: March 2019

In this paper, we study a problem of the control parameter settings in Differential Evolution algorithm and test a novel variant of the algorithm called CoBiDE. Although Differential Evolution with basic setting (i.e., CR=0.5; F =0.5) works quite well, it starts to fail on rotated functions. In general, we want to improve the convergence of algorithm primarily on rotated functions. It is done by adapting crossover parameter CR whereas parameter F is fixed to 0.5. There is a recommendation to set CR = 1 for rotated functions. It means that trial vectors are essentially composed from mutant. However, it is not easy task to set the parameters appropriately for solving optimization problem but it is crucial for obtaining good results. Moreover, the quality of points produced in evolution is highly affected by the coordinate system. In CoBiDE, the authors proposed a new coordinate system based on the current distribution of points in the population. We test these two approaches by running both algorithms on six pairs of rotated and non-rotated functions from CEC 2013 benchmark set in two levels of dimension space. This experimental study aims to reveal if such algorithm’s setting is invariant under a rotation.
Yenilebilir Su Kurbağası Pelophylax ridibundus (Pallas, 1771)'un Dişi ve Erkek Bireylerinin Karkas Miktarı Açısından Karşılaştırılması
Authors: Alkaya Ahmet , Şereflişan Hülya , Dikel Suat
Published: March 2019

Doğadan toplanan erkek ve dişi kurbağaların (Pelophylax ridibundus), boy uzunluğu (SVL) ve arka bacak uzunluğu ile karkas, arka bacak, deri, baş ve karaciğer ağırlığı alınarak karkas miktarı belirlenmeye çalışılmıştır. Dişi kurbağaların ortalama SVL değeri 91,6±0,53 mm, erkeklerin 81,1±0,69 mm olarak ölçülerek, aradaki farkın istatiksel açıdan önemli olduğu tespit edilmiştir. Gıda olarak tüketilen arka bacakların ortalama uzunluk değerleri, dişi kurbağalarda 72,0±0,65 mm, erkek kurbağalarda 68,0±0,53 mm tespit edilmiş ve aradaki farkın istatiksel açıdan önemli olduğu görülmemiştir. Arka bacakların ortalama ağırlıkları dişi kurbağalarda 21,45±5,06 g, erkek kurbağalarda 15,53±2.94 g olduğu ve her iki cinsiyette de bu miktarların toplam vücut ağırlığının yaklaşık %25‘ine denk geldiği belirlenmiştir. Çalışma esnasında dişi kurbağaların sırasıyla vücut, karkas ve gıda olarak tüketilen arka bacaklarının ortalama ağırlıkları, erkek kurbağalara göre daha yüksek miktarda tespit edilmiş olup; dişi kurbağalar ile erkek kurbağalar arasındaki bu ağırlık farkları aynı zamanda istatistiksel açıdan önemli bulunmuştur. Karkas ağırlıkları, hem dişi hem de erkek bireylerde toplam ağırlığın yaklaşık olarak %50‘sini oluşturmaktadır. Kesim işlemi sonucunda karkas dışında kalan; deri, baş ve karaciğerin ortalama ağırlıkları dişi kurbağalarda erkek kurbağalara oranla daha fazla miktarda bulunmuştur. Dişi ve erkek bireyler arasında baş ağırlığı hariç karkas dışında kalan diğer kısımlar arasındaki farkların önemli olduğu belirlenmiştir. Kurbağa derisi önemli bir sanayi ürünü olup, miktarı dişi kurbağalarda ortalama 8,07±2,04 g, erkek kurbağalarda ortalama 5,66±1,21 g bulunmuştur. Bu değerlerin oranı, toplam vücut ağırlığının %10‘una denk geldiği tespit edilmiştir. Bu çalışmada, dişi kurbağaların erkek kurbağalardan karkas kazancı bakımından daha iyi olduğu ve karkas miktarı dışında kalan, baş, karaciğer ve derinin miktarı tespit edilerek değerlendirilmesi araştırılmıştır.
Çiftçilerin Ürün Desenlerine Karar Vermelerini Etkileyen Faktörler: Samsun İli Bafra İlçesi Sebze Yetiştiricileri Örneği
Authors: Abacı Nur İlkay , Demiryürek Kürşat
Published: March 2019

Çiftçilerin tarım sektörünün doğal yapısından kaynaklanan birçok unsuru dikkate alarak çeşitli ürünler arasından kendilerine en uygun olanını nasıl seçtikleri ve üretimine nasıl karar verdiklerinin belirlenmesi önemlidir. Bu araştırmanın amacı, Samsun ili Bafra ilçesindeki sebze yetiştiricilerinin ürün desenlerine karar verirken etkilendikleri faktörleri belirlemektir. Bu amaca ulaşmak için basit tesadüfi örnekleme yöntemi ile belirlenen 122 çiftçi ile anket yapılmıştır. Çiftçilerin ürün desenlerine karar verirken etkilendikleri faktörleri belirlemek amacıyla, incelenen literatürden yararlanılarak ve araştırmacı tarafından yapılan pilot çalışmalardan hareketle sosyal ve kişisel, ekonomik, fiziksel ve iklim koşullarından kaynaklı faktörleri içine alan 67 madde tespit edilmiştir. Çiftçilerin düşüncelerini yansıtan ifadeler Likert tipi beşli bir ölçeklendirmeye göre puanlanmıştır. Araştırmada istatistiksel işlemler sırasına göre iç tutarlılık katsayılarının belirlenmesi, açıklayıcı faktör analizi, doğrulayıcı faktör analizi olarak gerçekleştirilmiştir ve bulgular sunulmuştur. Açıklayıcı faktör analizi sonucunda toplam varyansın %57,74‘ünü açıklayan; ürün özellikleri, fiziksel özellikler, işletme özellikleri, doğal faktörler, sulama özellikleri ve işgücü özellikleri olarak altı faktör grubu ortaya çıkmıştır. Analiz sonuçlarından elde edilen bulgulara göre çiftçilerin ürün desenlerini planlarken etkilendikleri en önemli faktör ürün özelliği ile ilişkilidir. Ancak, çiftçiler üretecekleri ürünlere karar verirken sadece ürün özelliklerinden değil aynı zamanda ellerinde olmayan farklı koşullardan etkilenmektedirler. Dolayısıyla çiftçilerin kararlarını etkileyen faktörler arasında davranış özelliklerinin de dikkate alınması gerektiği düşünülmektedir.
Gıda İsrafının Davranışsal Belirleyicileri; Çorum İli Örneği
Authors: Karakas Gungor
Published: March 2019

Gıda israfı ve kaybı ekolojik, ekonomik ve sosyal bir problemdir. Birleşmiş Milletler Gıda ve Tarım Örgütü, insan tüketimi için üretilen tüm yenilebilir yiyeceklerin yaklaşık üçte birinin, israf edildiğini veya hasat sonrası kaybedildiğini ifade etmektedir. Bu çalışmanın amacı tüketicilerin gıda israf davranışına etki eden faktörleri ortaya koymaktır. Bu amaca ulaşmak için Çorum ilinde 2018 yılı Kasım ve Aralık aylarında 583 kişi ile anket yapılmıştır. Elde edilen veriler Yapısal Eşitlik Modelleri aracılığıyla analiz edilmiş ve açıklanmaya çalışılmıştır. Yapılan Açımlayıcı Faktör Analizi sonucunda toplam varyansın %76,612‘sini açıklayan 5 faktörlü bir yapı elde edilmiştir. Bu faktörler; norm, niyet, sonuç farkındalığı, satın alma davranışı ve planlama olarak isimlendirilmiştir. Elde edilen bu faktörlerin geçerlilik, güvenilirlik, yapı tutarlılığına sahip olduğu belirlenmiştir. Ayrıca Doğrulayıcı Faktör Analizi aracılığı ile faktörlerin uyum endeks değerlerine uygun olup olmadığı araştırılmıştır. Yapılan Doğrulayıcı Faktör Analizi sonucunda, elde edilen faktörlerin uyum endeks değerlerini karşıladığı tespit edilmiştir. Faktörlerin birbiri ile ilişkisi ve israf davranışı üzerindeki etkisi yol analizleri ile ölçülmüştür. Bu çalışmanın sonucunda, tüketicilerin sonuç farkındalığı, niyet ve normlar bakımından olumlu ifadeler sergilemelerine karşın planlama ve satın alma aşamasında kararsız davrandıkları belirlenmiştir. Ayrıca israf davranışlarında niyet ve sonuç farkındalığının doğrudan etkisinin olmasına karşın, planlama ve normların dolaylı etkisinin olduğu tespit edilmiştir. Niyetin satın alma davranışı üzerinde en etkili faktör olduğu göz önünde tutulduğunda toplumda sonuç farkındalığı yaratacak etkinliklere ağırlık verilmelidir.
Bayburt Florasına Katkılar: Cichorieae (Asteraceae)
Authors: Güzel Murat Erdem , Gültepe Mutlu , Makbul Serdar , Bozkır İsa , Coşkunçelebi Kamil
Published: March 2019

Cichorieae Lam. & DC., Asteraceae familyasının oymaklarından biridir. Bu oymak tamamen dilsi çiçeklerden oluşan homogam başcık çiçekli ve lateksli üyeleriyle ile karakterize olur. Bu oymak ekonomik öneme sahip Lactuca L. (Marul), Scorzonera L. (Tekesakalı) ve Tragopogon L. (Yemlik) cinslerini içine alır. Bu oymağın üyeleri aynı zamanda halk ilacı olarak da kullanılır. Bayburt Soğanlı, Otlukbeli, Mescit ve Giresun Dağları arasında yer almaktadır. Fitocoğrafik olarak İran-Turan floristik bölgesinin ağaçsız step bölgesine dahildir ve Anadolu Çatalı‘nın kuzey ucunda yer almaktadır. Bu fitocoğrafik özelliklerinden dolayı Bayburt zengin bir bitki çeşitliliğine ev sahipliği yapmaktadır. Bu çalışmada Bayburt‘un bitki çeşitliliğine katkıda bulunulması amaçlanmıştır. Örnekler 2010-2017 dönemlerinde Cicerbita Wallr., Lactuca, Scorzonera, Tragopogon ve Prenanthes L. cinsleri üzerine olan farklı projeler kapsamında toplanmış ve Karadeniz Teknik Üniversitesi Biyoloji Bölümü Herbaryumu (KTUB) ile Rize Üniversitesi Biyoloji Bölümü Herbaryumu (RUB)‘nda muhafaza edilmektedir. QGIS paket programı kullanılarak toplanan bitki örneklerinin koordinatları Bayburt haritası üzerinde gösterilmiştir. Flora of Turkey and East Aegean Islands adlı eserde Bayburt için 4 Lactuca ve 7 Scorzonera, kaydı rapor edilmiştir fakat Tragopogon kaydı yer almamaktadır. Mevcut çalışmada Bayburt ili için 24 (5 Lactuca, 14 Scorzonera ve 5 Tragopogon) takson rapor edilmiştir ve bunların 6‘sı Türkiye endemiğidir. Sonuç olarak 13 takson Bayburt için ilk kez bu çalışmada rapor edilmiştir.
Çukurova Ekolojik Koşullarında Lavender (Lavandula angustifolia Mill.) de Diurnal Varyabilitenin Bazı Verim ve Kalite Özelliklerine Etkisinin Belirlenmesi
Authors: Sönmez Çiğdem , Okkaoğlu Hülya
Published: March 2019

Lavender as called Lavandula angustifolia Mill. is used for many purposes such as pharmaceutical, cosmetics etc industry. The aim of this study is to determine the effects of different harvest hours on yield, essential oil and essential oil yield in lavender. The research was conducted a randomized complete block design with three replications under Karaisalı/Adana ecological conditions. Flowering lavender plants were harvested every two hours starting from 8 am at five different times. The fresh herb yield, dry herb yield, drug flos yield, essential oil content and essential oil yield were determined in 2014 and 2015. The highest means were obtained from harvestings at 8 in morning when lowest means were recorded at harvesting at 14 in afternoon for both drug flos and essential oil yield in similar. Based on the results from research of two years, it was concluded that it would be suitable to harvest in early morning for obtaining high drug flos and essential oil yields.
Combined approach of perioperative antithromboembolic management in abdominal and thyroid surgery
Authors: Beyshenaliev Alymkadyr , Zhumagulov Nurgazy , Atabaev Taalaibek , Nyshanov Begmamat
Published: March 2019

Objective: Venous thromboembolism (VTE) in the form of either pulmonary embolism (PE) or deep vein thrombosis (DVT) complicates major surgery not infrequently. We analyzed in this study superiority of combined approach of thromboprophylaxis compared to conventional nonpharmacological preventive sets.

 Methods: We prescribed both pharmacological and non-pharmacological thromboprophylactic interventions for patients encountered thoracoabdominal surgery from 2013 to 2018 at clinic named after I.K.Akhunbaev of Bishkek city and Interregional United Clinical Hospital of Osh city. Demographic characteristics and clinical examination data were evaluated. Thrombogenic risk for every patient was assessed.  Screening for detection of VTE was conducted in early postoperative period.

Results: Two hundred forty-six candidates of abdominal and thyroid surgery were divided into 2 groups according to patient preference for prevention modality: combined and non-pharmacological. In the early postoperative period, venous thrombosis of the lower extremities developed in 17 patients non-pharmacological group and 8 patients of combined interventions (p<0.05).

Conclusion: Timely commenced, combined non-drug and pharmacological preventive sets for thromboembolic complications during major surgery decreases the incidence of venous thromboembolic complications.

Keywords: venous thromboembolism, lower extremity veins, major surgery, thromboprophylaxis