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Zaposlenost u poljoprivredi Bjelovarsko-bilogorske županije: stanje i perspektive

Zaposlenost u poljoprivredi Bjelovarsko-bilogorske županije: stanje i perspektive

Author(s): Vinko Barić / Language(s): Croatian Issue: 6/2012

The workforce represents the basic input of the overall progress in the agricultural production. The general trend of reducing the share of farm workers in the total population reflects the disappearance of the traditional character of agriculture and its transformation into a developed market-oriented activity. The de-agrarianisation and urbanisation processes unstoppably shape the production structure of economy so as to reduce the meaning of agriculture within economy. Nevertheless, the strategic importance of the agricultural production (primarily its nutritional function) has revived the discussions on the need for economic policy carriers to strive harder to grant this activity a more suitable position within the global aspect of development. The analysis of the importance of the agricultural production in the Bjelovar-Bilogora County has indicated to an important fact. Most indicators of the development of agriculture in the county prove that its importance exceeds the Croatian average. The portion of the county farming workforce averages out more than in other parts of the country. The employment- and workforce-related features of the farming activity in the county indicate to a rather pronounced problem of a low level of education and the unfavourable aging structure of farmers. In addition to disunited farms, it becomes obvious that in the county, the basic prerequisites for the development of efficient agricultural production have not been met. It is hence necessary to make additional efforts at the local level to increase the production and employment in agriculture. Even more so if a solid economic basis of the economic basis for the development of ecological agricultural production is taken into account.

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Obnovljivi izvori energije u funkciji intenzivne proizvodnje povrća

Obnovljivi izvori energije u funkciji intenzivne proizvodnje povrća

Author(s): Ante Čikić / Language(s): Croatian Issue: 6/2012

The perennial intensive production of green food (fruit and vegetables), realised indoors, under controlled conditions, often with inadequate thermo-technical solutions, considerable consumption and high energy costs, is rather modest. The production cycle is limited to the warmer period when energy costs are lower, which reduces to major extent cost-effectiveness, yield quality, competitiveness and longterm presence on the market. The Bjelovar-Bilogora County and its neighbouring counties have at their disposal a major potential of renewable energy sources (biomass, geothermal energy), which are not directed towards the enhancement of production-related activities, in particular the intensive production of green food. The lack of exact research and the use of general assessments are often the cause of insufficient practical valuation of biomass and geothermal energy, as well as the possible contribution to cost-effective intensive production of green food. Research has been carried out regarding the availability of forest and plant biomass, wood residue in wood processing plants and geothermal potential in the Bjelovar-Bilogora County, usable for supplying the centralised and/or decentralised facilities (polythene greenhouses) for the intensive production of fruit and vegetables with energy. The sustainable cost-effective diameter of collecting, preparing and providing renewable biomass was analysed. The consumption and cost-effectiveness of thermal energy from diverse types of propellants, comparable to directly applicable renewable energy sources, were presented and analysed. By the means of presenting quantified values, the complementariness between the available energy sources and the development of the perennial intensive production of green food and other activities in the Bjelovar-Bilogora County was pointed out.

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Značenje šuma za poljoprivrednu proizvodnju

Značenje šuma za poljoprivrednu proizvodnju

Author(s): Slavko Matić / Language(s): Croatian Issue: 6/2012

The relationship between the man and the forest has been a continuous one since the very beginnings of mankind. It is marked by forest cult, which the man has respected and nurtured since the earliest days of contact. By felling, clearing and burning forests, the man obtained food and firewood, ensuring thereby his survival. Fearing the wrath of “powerful forest creatures”, which he believed to inhabit the forests, the man kept particular parts of forests, which he called “holy groves”, untouched. He felt that the forest is consumed by a powerful extra-terrestrial existence; therefore, approximately 2,000 years ago, people started planting and growing trees around their houses, arranging gardens and creating forest ambience, which offered them peace and quiet. Today we comprehend that this cult had once caused the ever-present phenomenon of the forest: the so-called generally useful forest values or functions. This is the reason why forests have had a major meaning for and impact on human life and survival. Science divides the generally useful values to ecological or protective; social; and social-eco-physiological. The said values are stipulated by and defined in The Forest Act and other legal documents regulating the role and position of forests in our country. The Forest Act lists fifteen generally useful functions, dividing and calculating them – according to their contribution and importance regarding finances – in ten groups. Apart from having a positive effect on human life, most of these values significantly affect agricultural production as well, in the following aspects: protection from erosion; flood prevention; balanced water regime; increased soil fertility and agricultural production; milder climate; during photosynthesis, they use carbon from carbon dioxide for trees and other forest plants, releasing thereby oxygen. A particularly important link between forests and agriculture lies in the fact that all our original local fruit and wine-growing sorts, the so-called “wild” ones, even today belong to the structure of our natural forests; their biological attributes and ecological demands have hence been harmonized with and adapted to the mesoclimatic and microclimatic life conditions created by the forest. Thus, the ecological and biological links between forests and farming cultures should be pointed out in particular. Every natural forest creates its own climate, which affects both its immediate and its broader environment, especially fruit and wine-growing cultures. Our grape and wine sorts are known for their fine quality thanks to vineyards being grown on the south and southwest afforested hillsides of Plješivica, Ivančica, Kalnik, Papuk, Krndija, et al. European wine-growers have appreciated the importance of forests for the success of vineyards; that is why they grow vineyards in the vicinity of forests or grow forests in areas surrounded by major vineyard complexes, as may be observed on the south hillsides of the afforested Schwarzwald in Germany and Vogez in France, famous for high-quality fine wines. Krndija forests, covering 22,451 ha of land, are very stable, productive and biologically diverse, they consist of fourteen natural forest communities and more than fifty original local tree sorts. The written history of Krndija is equally long and old as the history of Kutjevo and its vineyards. After they had settled in the area in 1232, the Catholic order of Cistercites started clearing forests, growing vineyards and other farming cultures, as well as building wine cellars and producing wine. Kutjevo, Kutjevo land, vineyards and forests were further mentioned during the Turkish period 1698–1773, as well as between 1689 and 1698, when the land belonged to the Zagreb canon and abbot J. J. Babić. Jesuits had managed Kutjevo forests and vineyards 1698–1773; the Croatian Apprenticeship Trust had managed the land 1773–1880; while the Turković family had taken over the Kutjevo land in 1882 and remained its owners until 1945. After 1945, the land became oriented to viticulture and wine industry; it experiences a constant rise, while state-owned Forest Administrations manage Krndija forests. During the long years of the history and development of Kutjevo, its vineyards and forests, Krndija forests have – faithfully and usefully – accompanied and completed their owners’ economic activities and profit, in addition to viticulture and wine industry. Riesling is a grape sort that has been grown in Kutjevo on the south hillsides of Krndija for over a century. Forests and vineyards intertwine, interchange and surround each other there, causing mutual impacts and influences. This is, among others, a reason why Riesling in this area has developed its characteristic attributes, thanks to which it is singled out and different from all similar wine sorts grown in other areas, making it unique. Thanks to long-standing growing on habitats extraordinarily suitable for this sort, Riesling has developed high-quality features that had until then not been recognised in connection with this wine sort. This may – to the most part – be explained by the fact that Kutjevo vineyards grow on the land where Krndija forests have been growing since the earliest days. By their mesoclimatic, microclimatic and other features, they influence the grape that has grown wild in those forests since the earliest days, since ecological demands and biological attributes have been adapted to optimal conditions created by the forest through its existence, growth and increase. Soil and climate conditions, being to the most part a forest product, participate – according to research results – in defining the credit worthiness of vineyard soils with the maximum of 85 %, whilst all other conditions make out the rest of 15 %. Hence, it may be justly claimed that the impact of forests on agricultural production, in particular viticulture and wine industry, is not only major, but also rather significant. It is thus necessary to continue growing and nurturing both fine Kutjevo Riesling vineyards and Krndija forests.

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Obnovljivi izvori energije u Bjelovarsko-bilogorskoj županiji

Obnovljivi izvori energije u Bjelovarsko-bilogorskoj županiji

Author(s): Nikola Čupin / Language(s): Croatian Issue: 6/2012

Current trends regarding power supply are moving towards a change of policy in order to achieve the following aims: (1) energy saving by increasing energy efficiency; (2) increased using of renewable energy sources; and (3) reducing the emission of greenhouse gasses (environment protection). The Croatian energy strategy supports this policy. The production of electric energy from renewable sources is stimulated, and the same is expected in relation to the production of thermal energy from renewable sources. The paper describes the types and characteristics of the following renewable sources: wind, water, solar energy, biomass and biogas, as well as geothermal sources. The Bjelovar-Bilogora County is rich in biomass and geothermal sources. The Bjelovar Forest Administration covers seven counties and an area of 133,000 ha. The geothermal source Velika Ciglena is located in the County; a geothermal energy plant (with the power of approximately 4 MW is planned to be built there. Possibilities for the economic development of the county based on renewable sources, in particular biomass and geothermal sources, are favourable; plans should be made at the county level and private initiative, which is still very young, should be stimulated. E.g. the wood-processing industry in Čazma provides thermal energy from biomass to the school and the gym, and an extension of heating pipe to the city centre is planned.

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Teaching ellipse with cas

Teaching ellipse with cas

Author(s): Marin Marinov,Petya Asenova / Language(s): English Issue: 1/2018

The paper presents an approach to teaching Mathematics at university level using the computer system for symbolic manipulations Wolfram Mathematica. It gives an environment for fast calculations, visualization of properties, and explorations leading to the hypotheses. These way students participate actively in constructing their knowledge, obtain deeper understanding and they are able to apply their knowledge and skills for solving problems. We illustrate the approach on the topic Ellipse and demonstrate how it facilitates the understanding of the main concepts.

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Foreign direct investiment net inflows: data driven analysis

Foreign direct investiment net inflows: data driven analysis

Author(s): Ana Gjeorgjevskj,Kostadin Mishev,Irena Vodenska,Lubomir Chitkushev,Dimitar Trajanov / Language(s): English Issue: 1/2018

Foreign direct investments (FDIs) are considered an important driver of host countries economic growth, as they provide stable inflow of foreign capital, know-how and technology. FDI determinants have been studied extensively over the past decades and often identified among the different economic, regulatory and stability indicators of the host country. Studying FDI flows has not-trivial challenges too, because of the increased complexity of the multinational enterprises organizational structures and the difficulty this causes when compiling national FDI statistics. The purpose of this work is to study a large set of countries economic, governance and geopolitical indicators with regard to their correlation to the FDI net inflows, while taking into consideration the challenges suggested in the literature. Besides the detailed analysis of the correlations by indicator topic and countries income categories, the main contribution of this work is compilation of a set of geopolitical indicators from the world’s largest events database, GDELT, and correlating them to the FDI net inflows statistics.

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Software system readability metrics

Software system readability metrics

Author(s): Latchezar Tomov / Language(s): English Issue: 1/2018

In previous works we presented conceptual model of software understandability, based on the notion that all software are systems and the understanding of code is related to their structure and not only the sum of their code. We further this work by extending the system to include its observer and propose software system readability metrics based on a model of the observer and the software system using graph theory and information theory.

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Aestethic metrics and the evolution of C language family

Aestethic metrics and the evolution of C language family

Author(s): Latchezar Tomov / Language(s): English Issue: 1/2018

In previous works he defined the notions of intellectual aesthetic and proposed an ordinal measure of the aesthetic of function. We further this work in order to clarify the relationships between aesthetics and readability on both code and system level and to define aesthetics of code (previously we defined the aesthetics of functionality). We analyze the main drives behind the evolution of C languages, one of which is the aesthetic motive, at the expense of readability.

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Simulation and evolution of scenarios in a gas station using simul8 software

Simulation and evolution of scenarios in a gas station using simul8 software

Author(s): Denis Ramos de Oliveira,Joao Pedro Fonseca de Barcelos,Thiago Henrique Nogueira / Language(s): English Issue: 1/2018

The simulation consists of reproducing the functioning of a system by creating a model, considering its statistical data and its premises, to understand the behavior of the variables of interest. Within the simulation, several software are used. One of the most popular in organizational environments and in universities is the Simul8. This software uses two-dimensional animations, through representation in entities, resources, activities, entry points, output points, and queues. Its purpose is to simulate the operation of complex discrete models, and by manipulating the variables in the model, it is possible to simulate different scenarios and find effective solutions. As a complementary tool to the simulation of scenarios, it is relevant to cite the financial analysis, which through indicators such as EAC, MAR, NPV, PB, can indicate the economic viability of an investment. In this context, the objective of this paper was to develop a scenario analysis, through simulation in the software Simul8, in a gas station, which has an area of 150 m2 and offers the services of filling up gasoline, washing the car, and calibrating the tires, to its customers. In another situation, the purchase of an adjacent land of 80 m2 was analyzed. Therefore, it was possible to determine the number of pumps and employees that generates the highest profit, considering the available space of the two situations, and to develop a financial analysis to demonstrate the viability of the investment. It was demonstrated that the number of pumps and employees that generated the highest monthly profit was 4 and 6, respectively, for the first situation, with 150 m2, and 6 and 5 for the second, with 230 m2. It was verified that investment in the acquisition of the land is feasible because it generated both an NPV and EAC positives. However, this investment is not suggested, since the indicators obtained for the initial situation, with 150 m2, are higher, since no investments will be made in this situation and the profit values for the two scenarios are similar. Values of investment in pumps and other costs, as well as expenses, are not part of the scope of this paper, which may explain the high monetary values found based on the assumptions considered.

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Geographically weighted regression in analysis of information and comunication technology development in Indonesia

Geographically weighted regression in analysis of information and comunication technology development in Indonesia

Author(s): Dwu Puspita Sari,Jamilatuzzahro Jamilatuzzahro,Vijay Kanabar / Language(s): English Issue: 1/2018

The main purpose of this paper was to analyze the development of Information and Communication Technology (ICT) in Indonesia with Geographically Weighted Regression (GWR) to enable the identification of the variability of regression coefficients in the geographical. The study has been conducted using the statistical data for 33 provinces in Indonesia. There were 3 independent variables defined during this study as factors that influence the development of ICT in Indonesia: location, economic prosperity, and education, and internet users in Indonesia has been defined as dependent variable. The result of this research shown the highly correlation between those three independent variables toward defined dependent variable shown by the value of R square of 0.7310782 which means the dependent variable can be well explained by independent variables.

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Case study: Power bi visualizations applied to digital video publisher's adveryising space

Case study: Power bi visualizations applied to digital video publisher's adveryising space

Author(s): Joseph Chomski / Language(s): English Issue: 1/2018

As video viewing migrates from cable TV to increasingly fragmented platforms - web browsers, mobile phones, and over-the-top devices such as Roku and AppleTV – digital video publishers dependent upon advertising revenue face increasing operational challenges. Each platform has its own standards and data formats, creating multiple heterogeneous buckets of perishable advertising space. This case study presents how Microsoft Power BI visualizations were used to provide a holistic performance management view of advertising space, and helped optimize monetization of each platform by raising awareness of KPI’s to operations managers.

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An online platform for project based learning - a proposal

An online platform for project based learning - a proposal

Author(s): Yuting Zhang / Language(s): English Issue: 1/2018

Project Based Learning (PBL) has become a widely used teaching method in K-12 education and spread to higher education. It has been used in many technical fields, particularly in Engineering, also increasingly now in Computer Science. PBL is a student centered pedagogy that integrates knowing and doing. Through real life projects,, students work as teams to form project ideas, design projects and implement projects. Research has shown that PBL can motivate learning, enhance learning quality, and help students learn not only technical skills but also soft skills .While PBL has a number of benefits, it is also quite challenging to implement PBL effectively. In this paper, we propose an online platform to prompt the implementation of authentic PBL at the program level across different courses. The purpose of this online platform is to build a community for students to find, share, implement and discuss projects, as well as facilitate better communication between students and faculty members across different courses.

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Striking the balance: Traching data mining with the right mixture of depth and breadth

Striking the balance: Traching data mining with the right mixture of depth and breadth

Author(s): Gregory Page,Slav Angelov,Penko Ivanov,Vladimir Zlatev / Language(s): English Issue: 1/2018

The purpose of this paper is to describe the methodology that was used to develop and teach AD699: Data Mining for Business Analytics at Boston University’s Metropolitan College in Spring 2018 (on campus) and in Summer I 2018 (online). Data mining for business analytics is a field that sits at the intersection of statistics, computer science, and business-specific domain knowledge. The goal in teaching the course was to prepare students for a “full-spectrum” approach to data mining. That is to say, graduates of AD699 should be able not only to interpret and assess the results of the data mining process, but also to build the models, know the underlying functions, and alter the code in the R programming environment as needed to adjust the models. That said, this was not a Computer Science course, and the students were not coming from a programming background -- chief among the challenges associated with delivering this course was the question of how much emphasis to place on proper syntax. Where the course developers had to choose between breadth and depth, they opted for breadth; however, they remained careful at each step of the way to ensure that the course material remained substantive and challenging. By giving students a broad basis of exposure to topics such as data exploration and initial analysis, performance assessment, and implementation of both supervised and unsupervised learning models, the intention was to prepare them to have a reasonable level of fluency in whatever specific topic an employer wished them to drill down on at a deeper level in the workforce. From a pedagogical perspective, the course developers took a wide-ranging approach. Among the teaching methods employed were traditional lectures, video-based tutorials, technology-enabled tutorials (such as the AD699-specific lessons built using the Swirl platform, and accessible through the BU Virtual Lab environment), assigned readings, individual assignments, online discussion boards, and a culminating exercise that required students to work in teams to use a real-world dataset based on Airbnb rentals to build and apply data mining models.

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A framework for modeling in scale: An introduction

A framework for modeling in scale: An introduction

Author(s): Eric Braude / Language(s): English Issue: 1/2018

UML class models, arranged in the plain in the traditional manner, are very useful. However, this usefulness degrades rapidly for large, realistic models. The paper introduces a disciplined layout format that addresses this limitation.

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On sperner's theorem

On sperner's theorem

Author(s): Ivan Landjev / Language(s): English Issue: 1/2018

Let R be a finite chain ring with |R|=q2, R/radR=Fq. Every submodule M of RRn is isomorphic to a direct sum of cyclic modules:M=R/Nλ1 + R/Nλ2 + ... + R/Nλn,where λ1≥ λ2≥…≥ λn≥0 are integers and N=rad R. The n-tuple (λ1,λ2,…,λn) is called the shape of M. We consider the partially ordered set P of all submodules contained in a module of shape (λ1,λ2,…,λn). We prove an anlogue of Sperner's theorem saying that the size of a maximal antichain in P is equal to Σ[λμ]μ≤λwhere the summand is defined as the number of all modules of shape μ contained in a module of shape λ and the the sum runs over all partitions μ=(μ1,μ2,…,μn) with Σμi=[(Σiλi)/2].

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Introdusing agile concepts in project management and software development courses

Introdusing agile concepts in project management and software development courses

Author(s): Vijay Kanabar,Kalinka Kaloyanova / Language(s): English Issue: 1/2018

Software project management and software development courses have started introducing Agile Project Management theory and practice into their curriculum. Pedagogically very little has been written about their curriculum design, approaches or tools and techniques when attempting to embed agile topics into such courses. In this paper, we survey agile concepts and describe a curriculum of topics and learning outcomes which can be injected by any instructor seeking to enhance their course with agile theory and practice. We also map the PMBOK® standard with agile practice.

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Test design process improvement by six sigma (DMAIC) and R

Test design process improvement by six sigma (DMAIC) and R

Author(s): Dobromir Dinev / Language(s): English Issue: 1/2018

The world we live in is characterized by certain dynamism and vitality, effortlessly recognizable by all the happenings around us. The organizations that make business in such environment, should endeavor to become effective and efficient; and at the same time to be profitable. There is methodology that helps those organizations eager to achieve such uneasy task (to have better services and products); often the same has been referred to the Swiss Army knife of process improvement; this is Six Sigma. The article below is presenting a project that has been conducted by following the DMAIC trail of Six Sigma; the project itself managed an improvement of 37% of the test design process. For the Six Sigma statistics during the project it has been used the R programing language. Only results from the executed code will be presented in the article to follow.

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Introduction of Bell-Lankaster method and learning by doing into the practical curriculum at under-graduate  and graduate levels

Introduction of Bell-Lankaster method and learning by doing into the practical curriculum at under-graduate and graduate levels

Author(s): Valentina Ivanova,Mariyana Raykova / Language(s): English Issue: 1/2018

Micro IT projects are considered an educational innovation in the context of undergraduate education at department Computer Science at New Bulgarian University. The management of micro IT project in the educational context is challenging from organizational and academic point of view. This paper presents the introduction of Bell-Lancaster method into the practical curriculum at under-graduate and graduate levels from educational and from management perspective. The discussion covers the micro IT projects practicum set-up, the learning outcomes, the success rate of the projects and the students’ feedback. The pilot started in 2013/2014 with two teams, now it is scaled up to than 23 teams with more than 80 participants.

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Representative sample as a LP problem

Representative sample as a LP problem

Author(s): Dimitar Atanasov / Language(s): English Issue: 1/2018

Empirical analyses usually estimate the effect of some variables, considered as independent, on one (or more), considered as dependend. It is rare situation to have the whole population available for the analysis. Then, usually a subsample is chosen and the conclusions are generalized to the whole population. This approach is based on the concept that the sample represents, in some meaning the population. If a sample is large enough and the selection process is random, usually the sample is considered to be representative one. However in some cases the sample should satisfy some restrictions on selected characteristics, which are previously known for the population. Here we propose an approach to this problem as a solution of a task of integer linear programming.

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An online platform for study of effects of violence and traumatic events

An online platform for study of effects of violence and traumatic events

Author(s): Yiki Lu,Junjie Ding,Li-Ke Ko,Meng-Tse Li,Caleb Ruth,Yash Nanavati,Yi Zou,Bindu Kalesan,Lou Chitkushev,Guanglan Zhang / Language(s): English Issue: 1/2018

Prevalence of exposure to traumatic events in adults living in the United States is very high at 89% with the majority reporting multiple events of traumatic exposures [1]. The research regarding the long-term effects of exposure to childhood and adulthood traumatic experiences is still nascent and has not been studied as a life-course exposure. We, a multidisciplinary research team at BU, proposed a longitudinal study to assess injury/disease progression from trauma to cardiovascular outcomes by recruiting a contemporary national E-cohort of US adults (>18 years old) and collecting self-reported, longitudinal data over 10 years using a unique in-house multiplatform software application.

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