bluuebunny/crossref_metadata_2025_split huggingface dataset:
Measuring the Concentration of Insurance sector – the Case of Southeastern European Countries
Authors: Dimić Maja , Barjaktarović Lidija , Arsenijević Olja , Šprajc Polona , Žirovnik Janez 
Published: April 2018

Abstract

Background and purpose: The goal of the paper is to determine the level of concentration in the insurance sector in the following eight countries of South and Eastern Europe: Serbia, Croatia, Bosnia and Herzegovina, Montenegro, Former Yugoslav Republic of Macedonia, Romania, Bulgaria and Albania in the period from 2007 to 2012.

Design/Methodology/Approach: In this context, the analysed indicators of concentration were the market share of the four leading financial institutions (CR4), the Herfindahl-Hirschman Index (HHI), the coefficient of entropy (E), the coefficient of relative entropy (RE) and Gini coefficient (G).

Results: The study showed that the insurance sectors in the analysed countries are highly concentrated on average (according to CR4 indicator), medium concentrated (according to HHI) with high levels of inequality of distribution of market shares between individual participants (in terms of G coefficient), and in the zone of relative uniformity and equality of business entities (according to RE coefficient). The research results point out that the existence of different levels of correlation between the analysed indicators of concentration in the insurance sector, which confirms the conclusion that, in order to obtain relevant and quality conclusions about the level of concentration, it is necessary to review and analyse several indicators of concentration integrally.

Conclusion: In all observed indicators of concentration in relation with the density level GDP pc move in the zone of very low value, which on the one hand points to the fact that the analysed countries at a relatively similar level of development have significantly different levels of concentration, but also on the fact that some countries although at different levels of development, have similar levels of concentration.
Application of Vortex Flow Model in Propeller-Stator System Design and Analysis
Authors: Król Przemysław , Bugalski Tomasz 
Published: April 2018

Abstract
The paper covers basics of the vortex model used for propeller-stator systems. The outline of the design algorithm is given and the results of its application are shown. The designed propeller-stator system was the subject of model tests run at the CTO model basin and cavitation tunnel. Stator’s influence on the delivered power required by the propeller and its revolution rate has been examined by conducting self-propulsion tests with and without stator. The tests performed in the cavitation tunnel revealed only weak tip vortex cavitation on the propeller. No cavitation was observed on the stator at the design point. A wide range of the performed tests allowed the authors to identify details of the developed theory which will require further improvement.
Outlier Detection in Ocean Wave Measurements by Using Unsupervised Data Mining Methods
Authors: Mahmoodi Kumars , Ghassemi Hassan 
Published: April 2018

Abstract
Outliers are considerably inconsistent and exceptional objects in the data set that do not adapt to expected normal condition. An outlier in wave measurements may be due to experimental and configuration errors, technical defects in equipment, variability in the measurement conditions, rare or unknown conditions such as tsunami, windstorm and etc. To improve the accuracy and reliability of an built ocean wave model, or to extract important and valuable information from collected wave data, detecting of outlying observations in wave measurements is very important. In this study, three typical outlier detection algorithms:Box-plot (BP), Local Distance-based Outlier Factor (LDOF), and Local Outlier Factor (LOF) methods are used to detect outliers in significant wave height (Hs) records. The historical wave data are taken from National Data Buoy Center (NDBC). Finally, those data points are considered as outlier identified by at least two methods which are presented and discussed. Then, Hs prediction has been modelled with and without the presence of outliers by using Regression trees (RTs).
Selection of Main Engines for Hopper Suction Dredgers with the Use of Probability Models
Authors: Bocheński Damian 
Published: April 2018

Abstract
This paper presents a new original method of selection of main engines for hopper suction dredgers with regard to probabilistic models. It was proposed to use the normal distribution to describe the operational loads of the main receivers. The principles for determination of parameters of load distribution and design power of the main engines were formulated. Lastly, the principles of selection of the size and number of main engines has been proposed.
Selected Problems of Sensitivity and Reliability of a Jack-Up Platform
Authors: Rozmarynowski Bogdan , Mikulski Tomasz 
Published: April 2018

Abstract
The paper deals with sensitivity and reliability applications to numerical studies of an off-shore platform model. Structural parameters and sea conditions are referred to the Baltic jack-up drilling platform. The sudy aims at the influence of particular basic variables on static and dynamic response as well as the probability of failure due to water waves and wind loads. The paper presents the sensitivity approach to a generalized eigenvalue problem and evaluation of the performace functions. The first order time-invariant problems of structural reliability analysis are under concern.
Concept of Device to Inspect Internal Technical Condition of Marine Pipeline
Authors: Warnke Danuta 
Published: April 2018

Abstract
The article presents a concept of the device to inspect technical condition of the interior of a marine pipeline. The design assumption was that the vehicle would be built for a specific existing pipeline, which is the Nord Stream gas pipeline. Based on the analysis of operating parameters and dimensions of the pipeline, the economic diameter and the medium flow velocity were calculated. The shape of the structure was proposed, and the measuring instruments and materials for manufacturing the vehicle were selected. The problems of energy supply during vehicle operation, and its installation inside the pipeline were solved.
The Effect of Oxygenated Diesel-N-Butanol Fuel Blends on Combustion, Performance, and Exhaust Emissions of a Turbocharged CRDI Diesel Engine
Authors: Labeckas Gvidonas , Slavinskas Stasys , Rudnicki Jacek , Zadrąg Ryszard 
Published: April 2018

Abstract
The article deals with the effects made by using various n-butanol-diesel fuel blends on the combustion history, engine performance and exhaust emissions of a turbocharged four-stroke, four-cylinder, CRDI 1154HP (85 kW) diesel engine. At first, load characteristics were taken when running an engine with normal diesel fuel (DF) to have ‘baseline’ parameters at the two ranges of speed of 1800 and 2500 rpm. Four a fossil diesel (class 1) and normal butanol (n-butanol) fuel blends possessing 1 wt%, 2 wt%, 3 wt%, and 4 wt% (by mass) of n-butanol-bound oxygen fractions were prepared by pouring 4.65 wt% (BD1), 9.30 wt% (BD2), 13.95 wt% (BD3), and 18.65 wt% (BD4) n-butanol to diesel fuel. Then, load characteristics were taken when an engine with n-butanol-oxygenated fuel blends at the same speeds. Analysis of the changes occurred in the autoignition delay, combustion history, the cycle-to-cycle variation, engine efficiency, smoke, and exhaust emissions NOx, CO, THC obtained with purposely designed fuel blends was performed on comparative bases with the corresponding values measured with ‘baseline’ diesel fuel to reveal the potential developing trends.
Determining Effective Length for 40 HM-T Steel by Use of Non-Local Line Method Concept
Authors: Robak Grzegorz , Krzyżak Daniel , Cichański Artur 
Published: April 2018

Abstract
In the paper, the concept of non-local line method is presented and used for determining the effective length for notched elements. Experimental tests and calculations were performed for 40 HM-T (42CrMo4+QT) steel made specimens of two types, i.e. smooth specimens, and notched specimens with notch radius equal to 0.2 mm, 0.5 mm, 0.8 mm, and 1 mm. The performed FEM calculations took into account the multi-linear hardening model and cyclic material properties. The concept of the presented non-local line method bases on finding the position of critical plane and determining the effective length, meant as the fracture process zone. During numerical stress gradient simulations, also the weight function was implemented. It was observed that the effective length increases as the load increases.
Early cardiotoxicity after adjuvant concomitant treatment with radiotherapy and trastuzumab in patients with breast cancer
Authors: Marinko Tanja , Borstnar Simona , Blagus Rok , Dolenc Jure , Bilban-Jakopin Cvetka 
Published: April 2018

Abstract

Background
The purpose of the study was to find out whether there is a difference in the early parameters of cardiotoxicity (left ventricular ejection fraction [LVEF] and N-terminal pro-B-type natriuretic peptide [NT-proBNP]) between the two groups of patients: the patients treated for left breast cancer (left breast cancer group) and those treated for the right breast cancer (right breast cancer group), after the treatment had been completed.

Patients and methods
The study included 175 consecutive patients with human epidermal growth factor receptor-2 (HER2) positive early breast cancer, treated concurrently with trastuzumab and radiotherapy (RT), between June 2005 and December 2010. Echocardiography with LVEF measurement was performed before adjuvant RT (LVEF0) and after the completed treatment (LVEF1,). After the treatment NT-proBNP measurement was done as well. The difference (Δ) between LVEF0 and LVEF1 was analysed (Δ LVEF = LVEF0 - LVEF1) and compared between the two groups.

Results
There were 84 patients in the left and 91 in the right breast cancer group. Median observation time was 57 (37–71) months. Mean Δ LVEF (%) was -1.786% in the left and -2.607% in the right breast cancer group (p = 0.562, CI: -2.004 to 3.648). Median NT-proBNP were 111.0 ng/l in the left and 90.0 ng/l in the right breast cancer group (p = 0.545). Echocardiography showed that the patients in the left breast cancer group did not have significantly worse systolic and diastolic left ventricular function in comparison with the patients in the right breast cancer group, but, they had higher incidence of pericardial effusion (9 [11%] vs. 1 [1%]) (p = 0.007).

Conclusions
We did not find any significant differences in the early parameters of cardiotoxicity (LVEF, NT-proBNP) between the observed groups. Patients who received left breast/chest wall irradiation had higher incidence of pericardial effusion.
Is postmastectomy radiotherapy really needed in breast cancer patients with many positive axillary lymph nodes?
Authors: Marinko Tanja , Stanic Karmen 
Published: April 2018

Abstract

Background
Postmastectomy radiotherapy (PMRT) improves survival by eliminating potential occult lesions in the chest wall and lymphatic drainage area. Meta-analysis has shown that PMRT reduces mortality and local recurrence of patients with node positive breast cancer, but there is no specific data about the effectiveness of PMRT in a subgroup of patients with a high number of positive axillary lymph nodes (PALN). The aim of the study was to analyse the impact of the number of PALN on local and distant metastasis occurrence, overall survival (OS) and distant metastases free survival (DMFS) in patients treated with PMRT.

Patients and methods
We reviewed medical records of 129 consecutive breast cancer patients with PALN, treated at Institute of Oncology Ljubljana with PMRT between January 2003 and December 2004. We grouped patients according to the number of PALN as follows: Group 1 (less than 15 PALN) and Group 2 with more than 15 PALN. All patients received adjuvant systemic therapy according to the clinical guidelines. We analysed number of locoregional (LR) recurrences, distant metastasis, overall survival (OS), progression free survival (PFS) and DMFS.

Results
After the median follow-up time of 11.5 years, the Kaplan-Meier survival analysis of PALN showed significantly shorter OS (p = 0.006), shorter PFS (p = 0.002) and shorter DMFS (p < 0.001) in the group of > 15 PALN. Only one LR was found in the group of patients with more than 15 PALN. In multivariate analysis more than 15 PALN and treatment with anthracycline chemotherapy statistically significantly influenced OS and DMFS. For PFS presence of more than 15 PALN were the only independent factor of shorter survival.

Conclusions
Patients with more than 15 PALN have shorter DMFS, PFS and OS as compared to patients with less than 15 PALN, though they receive the same LR treatment. More studies with higher number of patients included are needed to further evaluate our findings.
Production and Commercialization of Timber in Angola after the Declaration of Independence
Authors: Chiteculo V. , Hájek M. , Kubová P. 
Published: April 2018

Abstract
The policy of production and commercialization of timber before and after the independence of Angola was assessed. Historical production of timber under control of Portuguese settlers before 1975 in comparison to the production of timber after this period was reviewed. We used a combination of published scientific studies and government reports to support the background of the paper and a structured questionnaire survey from which analyses were drawn using a logistic regression model. It was found out that timber production declined dramatically after Angola gained independence; the production of logs dropped from 555 000 m3 in 1973 to less than 115 400 m3. Out of the 100 mills that had existed in Angola before 1975 only twenty have been in operation today with annual wood production of less than 20% of extraction capacity. The knowledge concerning the historical production of timber before and after 1975 is not sufficient to provide suggestions for a management plan on what trees, where, and when are to be cut.
Antibacterial Effect of Carvacrol and Coconut Oil on Selected Pathogenic Bacteria
Authors: Božik M. , Hovorková P. , Klouček P. 
Published: April 2018

Abstract
Essential oils play a prominent role as flavouring agents and fragrances in the food and perfume industries. Carvacrol is a major component of various essential oils, such as oregano and thyme oils, and is responsible for their antimicrobial activity. Lauric acid is a medium-chain fatty acid (MCFA) with a high antibacterial potential. Both carvacrol and MCFAs have been used empirically as antimicrobial agents. Here, we tested the inhibitory properties of carvacrol and coconut (Cocos nucifera L.) oil containing a high percentage of MCFAs against 5 harmful bacterial pathogens: Escherichia coli, Salmonella Enteritidis, Staphylococcus aureus, Listeria monocytogenes, and Enterococcus cecorum. Gas chromatography (GC-FID) analysis of coconut oil showed a high concentration of lauric acid (41%). Microdilution antimicrobial assays showed that the combination of carvacrol and coconut oil had a stronger antibacterial effect against all tested bacteria than both agents separately. We conclude that carvacrol could significantly improve the antibacterial effect of coconut oil.
Early identification of patients in need of palliative care in slovenian general practice
Authors: Klok Lisette , Engels Yvonne , Veldhoven Carel , Rotar Pavlič Danica 
Published: April 2018

Abstract

Background
To help general practitioners (GPs) in early identification of patients with palliative care (PC) needs, this pilot study aimed to determine the potential of the combined original surprise question (SQ1) (‘Would I be surprised if this patient died within the next 12 months?’) and the second surprise question (SQ2) (‘Would I be surprised if this patient was still alive after 12 months?’). We hypothesized that answering these SQs would trigger them to make a multidimensional care plan.

Methods
26 Slovenian GPs, randomized into 4 groups, were invited to write a care plan for each of the four patients described in case vignettes (2 oncologic, 1 organ failure and 1 frailty case). GPs in group 1 were only asked to write a care plan for each patient. GPs in group 2 answered SQ1 and GPs in groups 3 and 4 answered SQ1 and SQ2 before writing the care plan. The type and number of PC aspects mentioned in the respective care plans were quantified into a numeric RADboud ANTicipatory (RADIANT) score.

Results
Mean RADIANT scores in groups 1-4 were 2.2, 3.6, 2.5 and 3.1, respectively. When comparing the different vignettes, vignette B (terminal oncologic patient) scored best (3.6). Mean RADIANT scores in groups 3 and 4 were slightly higher for GPs who would be surprised compared to GPs who would not be surprised if the patient was still alive in 12 months.

Conclusion
The combined SQs were considered helpful in the early identification of patients in need of PC in Slovenian general practice.
The prevalence of elevated blood pressure in a sample of slovene children and adolescents: a pilot study
Authors: Hertiš Tjaša , Petek Tadej , Marčun Varda Nataša 
Published: April 2018

Abstract

Introduction
The aim of our study was to determine the prevalence of prehypertensive and elevated blood pressure in the hypertensive range (elevated BP) and obtain some anthropometric measures in Slovene children and adolescents.

Methods
In the cross-sectional study lasting one year, we measured BP using mercury sphygmomanometers, as well as height, weight, waist, and hip circumferences in schools. Data from regular check-ups (oscillometric measurements) were also added to increase the sample size. Participants were 2-19 years old. For statistical analysis, we used two-sided multivariate analysis of variance, Pearson’s r, and chi-squared test.

Results
From altogether 1594 participants, 723 (45.4%) were boys and 871 (54.6%) girls. The prevalence of elevated BP on a single oscillometric blood-pressure measurement was 12.0% (95% CI: 10.3 to 13.9), and an additional 13.9% (95% CI: 12.0 to 15.9) had prehypertensive BP. In Riva-Rocci measurements, elevated BP was present in only 7.1% (95% CI: 4.9 to 10.1) and prehypertensive BP additionally in 3.9% (95% CI: 2.4 to 6.4) in comparison to oscillometric measurements, which showed higher prevalence. Importantly, overweight participants had a 1.75 times greater relative risk for prehypertensive BP (95% CI: 1.22 to 2.53; p<0.01). Obesity carried a 1.79 times greater relative risk (95% CI: 1.22 to 2.63; p<0.01) for BP outside of the normotensive BP range.

Conclusion
Arterial hypertension is becoming an important public health problem, especially due to the childhood obesity. It seems to concern also Slovene young population with prevalence of elevated BP at around 7.1% after a single auscultatory BP measurement.
Management of frailty at individual level – clinical management: Systematic literature review
Authors: Veninšek Gregor , Gabrovec Branko 
Published: April 2018

Abstract

Introduction
To deliver quality management of a frail individual, a clinician should understand the concept of frailty, be aware of its epidemiology and be able to screen for frailty and assess it when it is present, and, finally, to recommend successful interventions.

Methodology
A systematic literature search was conducted in the following databases: PubMed, Cochrane, Embase, Cinahl and UpToDate. The criterion in selecting the literature was that articles were published in the period from 2002 to 2017. From 67432 initial hits, 27 publications were selected.

Results
Useful interventions to address frailty are supplementation of vitamin D, proper nutrition, multicomponent training, home-based physiotherapy and comprehensive geriatric assessment, particularly when performed in geriatric wards.

Conclusion
Comprehensive geriatric assessment is an effective way to decrease frailty status especially when performed in geriatric wards. Multicomponent physical training and multidimensional interventions (physical training, nutrition, vitamin D supplementation and cognitive training) are effective measures to reduce frailty.
What Drives Economic Growth in Some CEE Countries?
Authors: Simionescu Mihaela 
Published: April 2018

Abstract
Considering the potential factors that might generate economic growth, a target for any economy, this paper identified some determinants of economic growth in the countries from Central and Eastern Europe (CEE countries) that are member states of the European Union. The foreign direct investment was the most important determinant of economic growth in most of the countries (Bulgaria, Slovenia, Estonia, Hungary, Romania, Poland, Latvia, Lithuania) in the period 2003-2016, according to Bayesian bridge regressions. The indicators related to the level and the quality of labour resources proved to be insignificant in explaining the economic growth in these countries. Moreover, in Croatia, Estonia, Latvia, Lithuania, and Poland, the government expenditure on education had a negative effect on economic growth.
Accident Risk Assessment for Highly Reliable Aviation Systems in Emergency Situations
Authors: Kuklev Evgeniy , Zhilinsky Žilinskis Viatcheslav 
Published: April 2018

Abstract
Safety of aircrafts exploitation is estimated by means of the using the results of the prognoses of the dangerous factors which could be take place during the flight in the off-design conditions. The risk - approach, based on the fuzzy sets methods, is discussed and find out the paths leading to the catastrophes of the different types of the vessels. The dangerous (Unsafeness, Hazard) is the discrete state with the factors which could be take place during the flight in the off-design conditions. It was suggested to find out the paths leading to the catastrophes under condition of the rare events with probabilities “almost zero”.
PENGEMBANGAN PEMBELAJARAN BERPENDEKATAN TEMATIK BERORIENTASI PEMECAHAN MASSALAH MATEMATIKA TERBUKA UNTUK MENGEMBANGKAN KOMPETENSI BERPIKR DIVERGEN, KRITIS DAN KREATIF
Authors: Sudiarta I Gusti Putu 
Published: April 2018

Artikel ini bertujuan (I) mengkaji hakikat pendekatanÂ tematik dalam pembelajaran matematika dan kesesuaiannya denganÂ tuntutan KBK, (2) mengkaji pendekatan pembelajaran matematikaÂ berorientasi pada pemecahan masalah matematika terbuka, (3)Â mendeskripsikan pengertian kompetensi berpikir divergen, kritis, danÂ kreatif, beserta indikator-indikatornya, dan (4) memberikan contohÂ model pemecahan masalah matematika terbuka untukÂ mengembangkan kompetensi berpikit; divergen, kritis, dan kreatifÂ dalam pembelajaran matematika. Kompelensi berpikir divergen, kritis,Â dan kreatif di kalangan peserta didik adalah sangat penting dalamÂ era persaingan global, karena tingkat kompleksitas permasalahanÂ dalam segala aspek kehidupan modern semakin tinggi. PendekatanÂ tematik memberi kesempatan kepada peserta didik untuk secaraÂ mendalam mengkaji topik-topik matematika yang dikemas secaraÂ menarik dan kontekstual, sedangkan pemecahan masalah matematikaÂ terbuka memberikan kesempatan luas untuk melakukan investigasiÂ masalah matematika secara mendalam, sehingga siswa dapatÂ mengkonstruksi segala kemungkinan pemecahannya secara divergen,Â kritis dan kreatif.