bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of geospatial technologies in constructing a flash flood warning model in northern mountainous regions of Vietnam: a case study at TrinhTuong commune, Bat Xat district, LaoCai province
Authors: Kieu Quoc Lap , Tran Duc Van 
Published: August 2021

Abstract
The model was constructed based on GIS spatial analyses, combined with Analytic Hierarchy Process (AHP) and Multi-Criterion Analysis method (MCA). The data gathered for the study were mainly from remote-sensing images, statistical data and surveys. Field experiments were conducted in Trinh Tuong Commune, Bat Xat District, Lao Cai province. This is a typical remote mountainous region of Vietnam in which flash floods often occur. The study analyzes and evaluates six primary factors that incite flash flood, namely: geomorphological characteristics, soil properties, forest and fractional vegetation cover types, local drainage basin slopes, maximum average rainfall of various years, and the river/stream density of the region. The zoning map showing flash flood potentials has determined that 19.91% of the area had an extremely high risk of flash flood occurrence, 64.92% of the area had a medium risk, and 15.17% had a low or very low risk. Based on the employment of daily maximum rainfalls as the primary factor, an online flash flood warning model was constructed for areas with a “high” or “very high” risk of flash flood occurrence.
Meghna riverbank erosion on lives and livelihoods of rural people: impacts and coping strategies
Authors: Halima  , Maria Amima Najnin 
Published: August 2021

Abstract
Riverbank erosion is one of the most hazardous disaster types for Bangladesh. It has both a direct and a negative impact on people and their livelihoods. This study aims to explore the impacts of Meghna riverbank erosion and the coping strategies that have been adopted by the affected people to combat this calamity, considering four unions under Matlab Uttar of Chadpur District. The findings reveal that the occupational status, income and expenditure of the affected people have changed due to erosion. Ninety-one percent of the respondents’ houses were fully damaged and 48% of them are living in shelter houses. The results also show that a large portion of the affected populace lost their assets and most of them are suffering from psychological distress. Around 87% of people borrowed money to cope with this hazard, and a strict law against sand dredging is recommended as one of the effective strategies to prevent Meghna river bank erosion.
Economic impact of the EU Eastern enlargement on New Member States revisited: The role of economic institutions
Authors: Hagemejer Jan , Michałek Jan J. , Svatko Pavel 
Published: August 2021

Abstract
The paper analyses the economic implications of the accession of New Member States (NMS) to the European Union (EU) in 2004 and 2007. The estimation effects of integration with the EU were carried out as a comparative case study using the synthetic control method (SCM) proposed by Abadie and Gardeazabal. Compared to previous studies analysing the effects of accession to the EU (Campos, Coricelli and Moretti), we check for the importance of the quality of economic institutions for the matching process of the analysed economies with their comparators. The results of the econometric analysis show a positive impact on the country performance 6 years and 12 years after accession to the EU. The gains from accession are large but not universal. For 5 of the 10 analysed countries the difference in levels of per capita gross domestic product (GDP) against the counterfactual is at least 30%.
Online Openness and Transparency of Local Budgets in Belarus
Authors: Krivorotko Yuri V. , Sokol Dmitriy V. 
Published: August 2021

AbstractWorld experience shows that public participation in the budget process and openness in the public sector are the necessary conditions for a proper economic strategy of the State. Financial openness contributes to the efficient collection and distribution of public resources. It expands the responsibility of governments, strengthens the trust of citizens and prevents opportunities for corruption. Researchers around the world (Alt, Lassen, Skilling, Bernick, Gandía, Yannacopoulos, Darbyshire, Slukhai and others) and international organisations such as the International Monetary Fund, OECD, the World Bank, the International Budget Partnership (IBP), the Global Initiative for Financial Transparency and the Open Government Partnership have shown growing interest in financial openness issues in recent years. This paper attempts to develop and test a methodology for the operational analysis of online information openness and transparency of the budget process at the local level. The developed methodology used two criteria: (1) the level of transparency of the local budget and (2) an assessment of authority's efforts in ensuring transparency of local budgets. It is based on expert assessments of the informational significance of particular elements of websites of local authorities in issues of local finance and budget. We interpret the resulting assessment of the information content of the site with the local budget and finances data as the online openness and transparency of local budgets Online Local Budget Index of Transparency (OLBIT).
Microeconomic Foundation for Phillips Curve with a Three-Period Overlapping Generations Model and Negative Real Balance Effect
Authors: Tanaka Yasuhito 
Published: August 2021

Abstract
We show a negative relation between the inflation rate and the unemployment rate, that is, the Phillips curve using a three-period overlapping generations (OLG) model with childhood period and pay-as-you-go pension for older generation under monopolistic competition with negative real balance effect. In a three-period OLG model, there may exist a negative real balance effect because consumers have debts and savings. A fall (or rise) in the nominal wage rate induces a fall (or rise) in the price, then by negative real balance effect, the unemployment rate rises (or falls), and we get a negative relation between the inflation rate and the unemployment rate. This conclusion is based on the premise of utility maximisation of consumers and profit maximisation of firms. Therefore, we present a microeconomic foundation for the Phillips curve. We also examine the effects of fiscal policy financed by seigniorage, which is represented by left-ward shift of the Phillips curve.
Constructing single-entry stem volume models for four economically important tree species of Greece
Authors: Koulelis Panagiotis P. , Ioannidis Kostas 
Published: August 2021

Abstract
Three different nonlinear regression models were tested for their ability to predict stem volume for economically important native tree species in Greece. Τhe models were evaluated using adjusted R square (Adj Rsqr) root mean square error (RMSE) and Akaike information criterion (AICc), where necessary. In general, the quadratic polynomial and cubic polynomial models and the two-parameter power models fit the data well. Although the two-parameter power function fit best for fir, oak, and beech trees, the cubic polynomial model produced the best fit statistics for black pine. Making forest inventory estimates often involves predicting tree volumes from only the diameter at breast height (DBH) and merchantable height. This study covers important gaps in fast and cost-effective methods for calculating the volume of tree species at national level. However, the increasing need for reliable estimates of inventory components and volume changes requires more accurate volume estimation techniques. Especially when those estimates concern the national inventory, those models must be validated using an entire range of age/diameter and site classes of each species before their extended use across the country to promote the sustainable use of forest resources.
Dispersion of the epigeic fauna groups in the agricultural landscape
Authors: Langraf Vladimír , Petrovičová Kornélia , Krumpálová Zuzana , Svoradová Andrea , Schlarmannová Janka 
Published: August 2021

Abstract
Changes in the structure of epigeic animal groups indicate ecological stability, which are influenced by urbanization, agriculture, and forestry. The aim of the paper was to assess the impact of agrarian land in the vicinity of urban and suburban landscape and non-fragmented forest in the vicinity of rural landscape on the occurrence of epigeic groups. We recorded the pitfall traps - 19, 676 individuals belonging to 20 taxonomic groups at 9 localities representing 7 types of habitat. Our results indicate a year-on-year increase in the number of individuals of epigeic groups in the city, with surrounding agrarian land. We found a correlation between eudominant epigeic groups of Aranea and Hymenoptera and rural landscape with the non-fragmented surrounding. Coleoptera has shown a link between the conditions of urban and suburban landscape with the surrounding developed agriculture. We confirmed a statistically significant effect for luminosity (p = 0.002), humidity (p = 0.025) and pH (p = 0.017).
Distribution patterns and conservation status of Crocus species in Iran, one of the diversity centers of Crocus in the Middle East
Authors: Tabasi Melika , Mehrabian Ahmadreza , Sayadi Sadaf 
Published: August 2021

Abstract
Assessing distribution patterns of valuable taxa plays an important role in the biodiversity conservation of these taxa. The genus Crocus L. (Iridaceae) comprises about 100 species that are distributed mainly in the Mediterranean region and western Asia. The present study purposed to assess the distribution patterns of Iranian Crocus species (including C. sativus L. and 8 wild species) and their conservation status in Iran as one of diversity centers of Crocus in the Middle East. A set of geographic distribution data was compiled through field studies, and reviews of herbarium specimens, iNaturalist, and various Flora. Localities were marked on geo-referenced maps (1/106) of Iran using ArcView version 3.2 (Esri, 2000). The distribution patterns of the taxa were mapped per 0.25° × 0.25° universal transverse Mercator grid cells (25 km2 with the exception of boundary area). Based on the species distribution (SDI) (33%) and species specialization (SSI) (44%) indices, those Iranian Crocus species that are threatened are mainly distributed in Irano-Turanian region. The mountainous ecosystems of Almeh and Western Alborz are important distribution centers of these taxa. Iranian Crocus species with SSI < 0.5 (C. almehensis, C. gilanicus, C. michelsonii, and C. caspius) have the highest conservation value.
Impact of management measures on the European ground squirrel population development
Authors: Petluš Peter , Petlušová Viera , Baláž Ivan , Ševčík Michal , Lešová Andrea , Hapl Ervín 
Published: August 2021

Abstract
In the past, the European ground squirrel represented a common part of Slovakian fauna. During the 20th century, there was a substantial decrease in its number, mainly due to the intensification of agriculture. Currently, several programs focused on the recovery and preservation of ground squirrel colonies have been implemented. The aim in supporting the population of the European ground squirrel is to increase the number of birds of prey and to ensure a food base for them. In this paper, we focus on evaluating the success rate of European ground squirrel (Spermophilus citellus) management measures. The research was realized at two localities in the Protected Bird Area Slovenský kras (Hrhov and Gemerská Hôrka) in the years 2015–2018. Activities were focused on the management of grassland and supplemental feeding during the breeding period. As a result of the management measures and the supplemental feeding, we managed to maintain a positive trend in the populations’ development, as there was an increase observed in all the monitored seasons.
Plasticity in response to soil texture affects the relationships between a shoot and root trait and responses vary by population
Authors: Foxx Alicia J. , Wojcik Siobhán T. 
Published: August 2021

Abstract
The relationships between shoot and root traits can inform plant selection for restoration, forestry, and agriculture and help to identify relationships that inform plant productivity and enhance their performance. But the strength of coordination between above- and belowground morphological and physiological traits varies due to differences in edaphic properties and population variation. More assessments are needed to determine what conditions influence these relationships. So, we tested whether plant population and soil texture affect the relationship between shoot and root traits which have important ecological ramifications for competition and resource capture: shoot height and root tip production. We grew seedlings of two populations of Bromus tectorum due to is fast growing nature in a growth chamber in loam soil, sand, and clay. We found variation in height by plant population and the substrate used (R2
= 0.44, p < 0.0001), and variation in root tip production by the substrate used (R2
= 0.33, p < 0.0001). Importantly, we found that relationships between shoot height and root tip production varied by soil texture and population (R2
= 0.54, p < 0.0001), and growth in sand produced the strongest relationship and was the most water deficient substrate (R2
= 0.32). This shows that screening populations under several environments influences appropriate plant selection.
Nickel in forests – a short review on its distribution and fluxes
Authors: Michopoulos Panagiotis 
Published: August 2021

Abstract
The distribution and cycling of nickel (Ni) in forests is greatly affected by their proximity to emission sources of the metal. The throughfall deposition is always richer in Ni than the bulk deposition. It can be inferred that some dry deposition enriches the throughfall. In remote forested areas, the hydrological fluxes of Ni do not differ a lot from those in litterfall. In addition, the current year needles in conifers have higher concentrations than the older needles, a sign of absorption and mobility of the metal. In contrast, near an industrial Ni source the older needles accumulate much more of the metal. The Ni content in bark tissue can be used to map the deposition distribution of the metal around an area (rural or urban). The concentrations of Ni in forest soils is also dependent on their distances from the Ni emission sources and the nature of the soil parent material. The Ni concentrations increase with soil depth due to the geogenic origin of the metal. Low pH greatly enhances the mobility of the metal in soils, much more than the leachability of organic matter.
Populations of Heracleum sosnowskyi and H. mantegazzianum (Apiaceae) in Kyiv (Ukraine)
Authors: Gubar Lubov , Koniakin Serhii 
Published: August 2021

Abstract
In connection with the increasing negative impact of invasive alien species on biodiversity and the environment in general, their research, as well as throughout the world, is relevant. The distribution of the Heracleum sosnowskyi and H. mantegazzianum of the secondary range on the example of the Kyiv agglomeration is investigated in the work. In our study we aimed to evaluate the possibility of spontaneous spread of giant hogweeds in the secondary range, adaptation of the species to the new conditions of the environment that favor to control of these species’ expansion and reduce the threat to the urban ecosystems and citizens’ health. We hypothesise that in the secondary range H. sosnowskyi and H. mantegazzianum settle sites with relatively high temperature (Tr), lightening (Lc), and soil moisture conditions similar to that in their natural range. 17 populations and four localities (sites) of H. sosnowskyi and H. mantegazzianum were studied. They were found within forest, meadow, riverine and ruderal plant communities. It is indicated that the advent species fully adapted to the conditions of the environment. The difference by ecological indicators Lc2 and Tm1 is pointed out. According to the results of our research, for the area of Kyiv urban agglomeration the growth of H. sosnowskyi and H. mantegazzianum is indicated in the plants communities of six classes. They spread most in ruderal plant communities of the: Robinietea, Artemisietea, Epilobietea classes. The studied species belong to invasive plant species in Ukraine and are characterized by extremely high effect on the environment and high invasive potential.
Power asymmetry and value creation in B2C relationship networks
Authors: Wieczerzycki Marcin 
Published: August 2021

Abstract
The purpose of this paper is to explore the problem of power distribution within networks of relationships between companies and consumers (business-to-consumer (B2C) networks) and to examine the ways in which value is created and captured in such structures. To this end, we applied the network approach to multiple theoretical constructs describing collective consumer phenomena, carried over from the field of sociology to management science. Based on the literature and case study analysis, we managed to define a typology of B2C networks consisting of three types: (1) publics – centered around and dominated by a company, with no relationships between consumers themselves, creating value through crowd-sourcing; (2) communities – also centered around a company, but independent to a degree and more focused on consumer-to-consumer (C2C) relationships, creating value through consumer-managed projects; and (3) tribes – where companies serve only as peripheral actors, and their products – as potential symbols of affiliation, with value being created through creation and reinterpretation of the said products’ meanings (sign value).
Permanent establishment as a foreign direct investment in Poland: identification of tax barriers in the context of new tax development
Authors: Jamroży Marcin , Janiszewska Magdalena 
Published: August 2021

Abstract
The paper aims to identify the significant tax barriers to foreign direct investment (FDI) in Poland, in particular in the form of a permanent establishment (PE), in the context of new developments in international tax law. Due to the recommendations of the Base Erosion and Profit Shifting (BEPS) project, launched by Organisation for Economic Co-operation and Development (OECD) to prevent international tax avoidance, the understanding of PE has changed, which could lead to changes in business models. The purpose of the research is also to identify the significant tax barriers to economic activity in Poland, in particular in the form of PE, against the international tax law context. The study conducted by the authors relies on the most current tax rulings and judgments of administrative courts issued between 2017 and 2020. It is concluded that not so much the effective tax burdens but the regulatory ambiguity surrounding the tax obligations may contribute to the reduction of Poland's attractiveness as a location for FDI.
Physicians’ Experience and Willingness to Participate in Non-Interventional Trials in Bulgaria
Authors: Kostov Emil S. , Grigorov Evgeni E. , Lebanova Hristina V. 
Published: August 2021

Summary
Non-interventional studies (NIS) are conducted to obtain additional information about a medicinal product prescribed in the usual manner in compliance with the conditions determined in the marketing authorization. They are a valuable source of real-world data for the effectiveness and safety of medicines. This study aims to assess physicians‘ knowledge of non-interventional studies in Bulgaria and identify the primary factors and barriers hindering the NIS at a national level. An individual anonymous questionnaire with 16 items was distributed among physicians in inpatient and outpatient settings. The results showed that 81.3% (n=147) of the respondents have no experience with non-interventional studies. Physicians‘ willingness to participate in NIS in the future is high and independent of their previous experience. The main barriers hindering conducting NIS in Bulgaria are related to organization, the conduct and the design of the trials, and, sometimes, the investigators‘ concerns. There is a need for proper training of the researchers and expanding healthcare resources to grow the NIS sector in Bulgaria in line with the tendencies in Europe.
The Role of Triglyceride to HDL Cholesterol Ratio in Sera as a Clinical Surrogate Marker for Cardiovascular Risk and Insulin Resistance in Patients with Metabolic Syndrome
Authors: Ganeva Silviya S. , Rayanova Ginka H. , Todorova Katya N. , Lukanov Tzvetan H. , Blazheva Svetla O. 
Published: August 2021

Summary
The study aimed to investigate the triglycerides to HDL-cholesterol ratio (Tg/HDL) and the interaction of this ratio with insulin resistance (IR) and insulin secretion indices, with the levels of interleukin - 1(IL-1), interleukin-6 (Il-6), and tumour necrotic factor-α (TNF-α) in sera among patients with metabolic syndrome (MS). A prospective, cross-sectional, comparative study was conducted on 45 patients with MS without data for hyperglycemia and 21 metabolically healthy non-obese controls. The levels of fasting and postprandial glucose, immunoreactive insulin (IRI), total cholesterol, triglycerides (Tg), IL-1, IL-6, and TNF-α were measured in all the participants. We calculated the LDL cholesterol levels, Tg/HDL ratio, homeostatic model of insulin resistance (HOMA-IR), and the homeostatic model of β-cell function (HOMA-b). Patients with MS had higher BMI (38.73±1.84 vs. 24.32±2.71 kg/m2; р<0.05) and waist circumference (115.56 ±4.7 vs. 81.1±8.4cm; р<0.05) than non-obese controls. The same patients had higher LDL cholesterol levels (3.42±0.3 vs. 2.63±0.66 mmol/l; р<0.05) and Tg (1.59±0.22 vs. 1.08±0.31mmol/l; р<0.05), as well as lower levels of HDL-cholesterol (1.03±0.09 vs. 1.27 ± 0.24mmol/l; р<0.05) compared to the controls. The Tg/HDL ratio was 2.03±0.87 among the patients with MS and 0.88±0.27 in controls; р<0.05. The plasma levels of basal IRI (19.32±3.22 mIU/l vs. 9.13±0.73mIU/l; р<0.05), HOMA-IR (4.02 vs. 1.97; р<0.05) and HOMA-b (258.77±57.76 vs. 183.31±17.52; р<0.05) were significantly higher in the MS group. The same patients with MS had higher concentrations of IL-1 (18.37±4.28pg/ml vs. 7.12±1.74pg/ml; p<0.05), IL-6 (1.01±0.3pg/ml vs. 0.1±0.3pg/ml; р<0.05) and TNF-α (2.13±1.43 pg/ml vs. 1.82±0.94pg/ml; р=0.24) too. Positive correlations between the levels of IL-1 and Tg/HDL ratio (r= 0.46; p=0.008), IL-1 and HOMA-%В (r=0.47; p=0.005) were found. The Tg/HDL ratio is a potential, cheap and available surrogate marker for screening for cardiovascular risk and insulin resistance in patients with MS in clinical practice.
Dieulafoy Lesion as a Source of Bleeding: A Report of Two Clinical Cases
Authors: Sarafiloski Goran , Marinova Mimi R. , Tonchev Pencho T. 
Published: August 2021

Summary
Dieulafoy’s lesion is a rare source of gastrointestinal bleeding. It can be found anywhere in the gastrointestinal tract, but is most commonly seen in the proximal third of the stomach. It is a submucosal artery, adjacent to the mucosal surface, with no evidence of superficial ulcers. Lesions are routinely diagnosed and treated endoscopically. Their frequency is currently not well known, because as Dieulafoy lesions can be easily missed during endoscopy, and bleeding lesions are sometimes misidentified. In this article, we describe two cases of bleeding from the upper gastrointestinal tract, manifested by hematemesis and melena. Bleeding was successfully managed endoscopically by means of injection of adrenaline solution and application of an endoscopic hemoclip.