scholarly journals Comparison and Analysis of Publicly Available Bathymetry Models in the East Adriatic Sea

Naše more ◽  
2021 ◽  
Vol 68 (2) ◽  
pp. 110-119
Author(s):  
Ljerka Vrdoljak ◽  

In this paper the latest versions of six publicly available bathymetry models: DTU10bat, EMODnet 2018, ETOPO1, GEBCO 2020, Smith and Sandwell V20.1 and SRTM15+ V.2.1. are compared and evaluated in the area of continental shelf of Croatia settled along well intended east Adriatic coast. Survey data in the area is not available through open access data bases, but publicly accessible in agreement with data holders (hydrographic institute, research centres and industry). These grids provide alternative sources of information about seafloor topography. Marine researchers should be acquainted with the main characteristics as well as pros and cons of bathymetry models in order to choose the best one for a specific purpose. In this paper the most important characteristics and information about grids are presented: resolution, coverage, release date, horizontal and vertical datum, data source, registration method, producer and link to website with an emphasis on the underlying source data. The underlying source data is one of the most important parameters that determine the quality of the bathymetric model. Hypsometry curve that is describing the area distribution of depth is calculated for each bathymetry model over the test area of the east Adriatic. For pixel to pixel comparison, grids were resampled to same one-minute resolution and absolute differences between models are calculated in identical points. Absolute differences between models show level of mutual compatibility between models as well as areas of highest disagreements that indicate the presence of outliers or systematic errors within models. In order to demonstrate how well publicly available bathymetry models fit the true topography of the sea floor, grids were compared to high-resolution digital bathymetry model interpolated from the multibeam survey in the area of Murter Sea. This paper should assist in the choice of a most suited bathymetry grid in future maritime studies in the Adriatic.

Author(s):  
D. Verzilin ◽  
T. Maximova ◽  
I. Sokolova

Goal. The purpose of the study was to search for alternative sources of information on popu-lation’s preferences and response to problems and changes in the urban environment for use in the operational decision-making at situational centers. Materials and methods. The authors used data from search queries with keywords, data on communities in social networks, data from subject forums, and official statistics. Methods of statistical data analysis were applied. Results. The analysis of thematic online activity of the population was performed. The re-sults reflected the interest in the state of the environment, the possibility of distance learning and work, are presented. It was reasoned that measurements of population’s thematic online activity let identify needs and analyze the real-time response to changes in the urban envi-ronment. Such an approach to identifying the needs of the population can be used in addition to the platforms “Active Citizen” of the Smart City project. Conclusions. An analysis of data on online activity of the population for decision-making at situational centers is more operational, flexible and representative, as compared with the use of tools of those platforms. Such an analysis can be used as an alternative to sociological surveys, as it saves time and money. When making management decisions using intelligent information services, it is necessary to take into account the needs of the population, reflect-ed in its socio-economic activity in cyberspace.


Author(s):  
Geoff O’Dea ◽  
Julian Long ◽  
Alexandra Smyth

This new guide to schemes of arrangement draws together all of the elements of the law and practice concerning both creditor and member schemes. Member schemes of arrangement have become the preferred method of implementing takeovers in the UK. Creditor schemes of arrangement are increasingly used in restructuring matters and the trend in their usage in foreign companies is likely to continue as many credit documents across Europe are arranged and underwritten in London under English law. The book considers the effect given to an English scheme in foreign jurisdictions, and other Private International Law issues. A major issue for those considering a scheme for creditors is whether a scheme or CVA (Company Voluntary Arrangement) is more appropriate and this book assists the reader by including an analysis of the pros and cons of schemes and CVAs. There are very few sources of information on schemes of arrangement and the area takes much of its substance from case law. This book, addressing the law and practical issues faced by practitioners on a day-to-day basis, is a first in the field.


POPULATION ◽  
2019 ◽  
Vol 22 (4) ◽  
pp. 90-102
Author(s):  
Aysylu Ilimbetova

Development of the market economy and changes in the principles of social structuring of society lead to the fact that the concept of gender equality goes beyond the labor market and begins to spread to other spheres of public relations, for example, entrepreneurship. However, to obtain empirical data to understand the extent of participation of men and women in business, it is not sufficient to conduct surveys or censuses, because they do not specialize in such information and provide data only on forms of employment (for hire and not for hire). The article deals with the possibilities of using administrative sources of information (the Unified register of small and medium-sized businesses) and the SPARK information base to obtain gender statistics and assess gender equality on the example of women's entrepreneurship in Russia. The main advantage of these sources of information is the possibility of extracting data on the activities of Russian entrepreneurs, for which information is not provided by the statistical collections of Rosstat. Calculations of the author make it possible to establish existence in the Russian business of gender differentiation in entrepreneurship, formation of employment niches assigned to each sex that allows us to speak about the specific features of the Russian business. Thus, women are concentrated in micro- and small businesses; they are mainly engaged in the socially important services—health care and education, other individual services; they are prone to less risky and less innovative spheres, such as trade and services; there are similarities between the structure of entrepreneurship, employment as employees and the professional structure of population.


2021 ◽  
pp. 51-61
Author(s):  
Dmitry Rudenkin ◽  
Dmitrii Valer'evich Trynov

This article is written in the theoretical-methodological genre. The key goal lies in the revision and systematization of versatile analytical hypotheses proposed by social and human science in order to explain the interest of Russian youth in politicized information content on the Internet. It is noted that the current analytical practice faces a fundamental contradiction between the prevalence of reflections of the scholars on the significant role of the Internet in development of the political moods and attitudes of the Russian youth audience and the absence  the well-established scientific representation on the reasons why there is a need to search  for political information namely on the Internet. This article aims to clarify this contradiction. Theoretical-methodological analysis is conducted on the disparate ideas used by social and human science to explain and interpret the heighted interest of Russian youth in the online politicized content. Procedurally, the work leans on the analysis of relevant current scientific literature for the period from 2015 to 2020 dedicated to examination of the patterns of Internet behavior and political culture of modern Russian youth. The conclusion is made that there are several versions that explain the heightened interest of Russian youth in politicized information on the Internet, which logically correspond with each other, but are usually not being generalized. Having summarized these versions into a single analytical model, the authors indicate the key reason for the heightened interest of Russian youth in political information on the Internet is the low level of trust in the traditional media, which forces them to seek the alternative sources of information on topics of concern online.


Author(s):  
Asif M. Huq ◽  
Fredrik Hartwig ◽  
Niklas Rudholm

AbstractThe purpose of this study is to investigate if audited financial statements add value for firms in the private debt market. Using an instrumental variable method, we find that firms with audited financial statements, on average, save 0.47 percentage points on the cost of debt compared to firms with unaudited financial statements. We also find that using the big, well-known auditing firms does not yield any additional cost of debt benefits. Lastly, we investigate if there are industries where alternative sources of information make auditing less valuable in reducing the cost of debt. Here, we find that auditing is less important in lowering cost in one industry, agriculture, where one lender has a 74% market share and a 100-year history of lending to firms within that industry. As such, it seems that lenders having high exposure to a certain industry might act as an alternative to auditing in reducing the information asymmetry between the firm and the lender.


Author(s):  
Michael Latner

Chapter 4 considers the sources of systematic evidence that are available to diagnose problems of American elections. Many claims and counterclaims about alleged malpractice are often heard in partisan debate and journalistic commentary—but during an era of low trust in the legacy news and isolating bubbles in social media, what could help to sort out fact from fiction? What are the pros and cons of alternative sources of evidence? This chapter compares electoral performance data on issues of voter registration permissiveness, ballot access, system security, and gerrymandering from several expert indices, institutional measures, and mass surveys.


Author(s):  
Dannagal Goldthwaite Young

This book explores the aesthetics, underlying logics, and histories of two seemingly distinct genres—liberal political satire and conservative opinion talk—making the case that they should be thought of as the logical extensions of the psychology of the left and right, respectively. One genre is guided by ambiguity, play, deliberation, and openness, while the other is guided by certainty, vigilance, instinct, and boundaries. While the audiences for Sean Hannity and John Oliver come from opposing political ideologies, both are high in political interest, knowledge, and engagement, and both lack faith in some of the United States’ core democratic institutions. This book illustrates how the roles these two genres play for their viewers are strikingly similar: galvanizing the opinion of the left or the right, mobilizing citizens around certain causes, and expressing a frustration with traditional news coverage while offering alternative sources of information and meaning. However, the book proposes that these genres differ in a crucial way: in their capacity to be exploited by special interests and political elites. The book concludes that due to the symbiotic relationship between conservative outrage and the psychological and physiological characteristics of the right, conservative outrage is uniquely positioned as a mechanism for successful elite propaganda and mobilization—in a way that liberal satire is not.


2021 ◽  
Author(s):  
Korina Konstantina Drakaki ◽  
Georgia-Konstantina Sakki ◽  
Ioannis Tsoukalas ◽  
Panagiotis Kossieris ◽  
Andreas Efstratiadis

<p>The highly-competitive electricity market over EU and the challenges induced by the so-called “Target Model”, introduce significant uncertainties to day-ahead trades involving renewable energy, since most of these sources are driven by non-controllable weather processes (wind, solar, hydro). Here, we explore the case of small hydropower plants that have negligible storage capacity, and thus their production is just a nonlinear transformation of inflows. We discuss different forecasting approaches, which take advantage of  alternative sources of information, depending on data availability. Among others, we investigate whether is it preferable to employ day-ahead predictions based on past energy production data per se, or use these data in order to retrieve past inflows, which allows for introducing hydrological knowledge within predictions. Overall objective is to move beyond the standard, yet risky, point forecasting methods, providing a single expected value of hydropower production, thus quantifying the overall uncertainty of each forecasting method. Power forecasts are evaluated in terms of economic efficiency, accounting for the impacts of over- and under-estimations in the real-world electricity market.</p>


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