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Acceleration of Image Segmentation Algorithm for (Breast) Mammogram Images Using High-Performance Reconfigurable Dataflow Computers
Get PDFImage segmentation is one of the most common procedures in medical imaging applications. It is also a very important task in breast cancer detection. Breast cancer detection procedure based on mammography can be divided into several stages. The first stage is the extraction of the region of interest from a breast image, followed by the identification of suspicious mass regions, their classification, and comparison with the existing image database. It is often the case that already existing image databases have large sets of data whose processing requires a lot of time, and thus the acceleration of each of the processing stages in breast cancer detection is a very important issue. In this paper, the implementation of the already existing algorithm for region-of-interest based image segmentation for mammogram images on High-Performance Reconfigurable Dataflow Computers (HPRDCs) is proposed. As a dataflow engine (DFE) of such HPRDC, Maxeler's acceleration card is used. The experiments for examining the acceleration of that algorithm on the Reconfigurable Dataflow Computers (RDCs) are performed with two types of mammogram images with different resolutions. There were, also, several DFE configurations and each of them gave a different acceleration value of algorithm execution. Those acceleration values are presented and experimental results showed good acceleration
The justification of the subject planning history
Get PDFOver the last decade of the 20th century the history of the spatial planning was accredited as a subject at schools worldwide, gained its special periodical and accompanying professional organization. When it comes to the Belgrade school of planning, the subject called spatial planning was introduced by the accreditation of the new curriculum at the Department of Spatial Planning of the Faculty of Geography in Belgrade in 2007. Nowadays at the international level and in our country, a serious theoretical discussion on the reach, direction and practical purpose of this subject is underway, and the questions which are posed thereby are sometimes provocative, controversial and far-reaching. These are the most common questions: What is the definition of the planning history? Why teach it? Who can teach it? How to teach it? What is the suitable content of the curriculum of the planning history? Although, this paper aims at the consolidation of the topics and providing the logical connections between the answers to the above questions, it, at same time, reflects the diversity of the individual approaches to planning history, which are the result of the peculiar circumstances in which spatial planning is taught in some countries, with different traditions of planning and different value systems. Nevertheless, the aim of the paper is the definition of something which can be called "intellectual nucleus" of a great topic called history (of spatial and urban) planning and which should be based on the logical theoretical and methodological premises, and, at the same time, should be comprehensible to students, through the flexible curriculum, and it should be applicable in practice
Challenges of water management: Case study of Gruža reservoir
Get PDFThe paper analyses the legal and institutional framework of water management in Serbia. The aim is to identify existing obstacles that interfere with the development and implementation of Integrated Water Resources Management (IWRM). The paper points out some of the most common challenges of integrated reservoir management in Serbia, such as gaps and ambiguities in the legislative framework, poor institutional coordination, underdeveloped environmental awareness and often conflicting stakeholder involvement. The case study is trying to address the current challenges of using and managing the water reservoir. The paper will provide answers to the following questions: What are the main problems related to the use and management of reservoirs, how to reconcile different sectors and users of the water resources, how to achieve the economic and environmental development goals?
Environmental problems and land use of the three islands' sites in Belgrade (Serbia)
No full textFlowing through Belgrade (Serbia), are the two most significant rivers Sava and Danube, both characterized as the flatland flow-type rivers, with a large number of river islands. According to the aspects of land use the three most important islands can be singled out, but at the same time the existence of certain environmental problems can be determined. The purpose and use of the islands completely differs. The present research aims, at first, to analyze the state and problems of the environment and land use of the "three islands' sites" and to present concrete recommendations for future activities in those areas, with particular emphasis on the area of Ada Huja island, and secondly, to present environmental quality of Ada Huja in the most reliable way, through the valorization method. In the field of protection and improvement of the environment, strategic goal is the restoration and enhancement of degraded environment, revitalization of construction land and activation of brownfields. It can also be a preventive protection of all planned activities that could endanger the existing environmental quality of the "three islands' sites"
LiDAR технологија и визуализација
Get PDFПодаци добијени LiDAR технологијом (енгл. Laser Imaging Dетection And Ranging)
могу да генеришу огромне количине 3D информација о карактеристикама сниманог простора. Поставља се питање: Шта све можемо урадити са тим подацима када их добијемо? Потенцијал LiDAR података да прикаже веродостојније, реалистичније визуализације снимљеног простора има изразито широку употребну вредност – може да утиче на више фаза у планском процесу. Овим радом покушаћемо да прикажемо и приближимо LiDAR технологију и партиципативно просторно планирање кроз коришћење 3D података у геовизуализацији са посебним акцентом на област јавног увида, с обзиром на подизање свести јавности о променама у урбанм и руралним подручјима. Последњих година, када говоримо о комуникативном планирању, увек се у центру пажње налази реалистична визуализација простора, односно 3D модели простора и широка палета апликација за манипулисање истим. Апликације за стварање виртуелне реалности који користе LiDAR податке имају могућност приказивања далеко више визуелних детаља и информација о простору него што је тренутно могуће са подацима добијеним из других извора и начина снимања терена. Способност да се информације о простору представе визуално и динамички, углавном кроз анимиране снимке тог предела, даје LiDAR технологији предност у односу на све друге методе и начине визуелизације простора, што је веома битно у циљу повећавања укључења и ангажовања јавности током читавог процеса планирања. 3D геовизуализација представља један веома реалан и природан пут преношења комплексних просторних информација ширим народним масама, а од посебне помоћи је људима који немају много искуства са читањем и интерпретацијом традиционалних 2D мапа које се данас у највише користе у планирању.
Геовизуализација нам доноси један интерактиван приступ у размени и разумевању
просторних информација између специјалиста и обичног човека. Док о овоме говоримо,
апликације, као што су Noun 3D, Landscape Viewer и др., се развијају у циљу успостављања
комуникације између просторних сценарија и шире јавности у партиципативном планском
процесу.Уредник: Душко Јоји
Demografske prilike opštine Koceljeva kao ograničavajući faktor razvoja
No full textUrednici: Rajko Golić, Marija Beli
Importance and spatial dispersion of tourist attractions of Belgrade
Get PDFBeograd je najposećenija turistička destinacija u Srbiji, što posebno dolazi do izražaja u prometu inostranih turista. Atrakcijsku bazu grada čine kulturno-istorijsko nasleđe, manifestacije, prirodne vrednosti sa rekreativnim zonama i bogat noćni život. Cilj ovog rada je pružanje uvida u značaj pojedinačnih atrakcija, njihov prostorni razmeštaj i prisustvo u destinacijskom imidžu Beograda. Kako bi se istražila navedena pitanja, sprovedeno je anketno istraživanje na uzorku od 157 inostranih turista. Anketa sadrži pitanja o socio-demografskim odlikama ispitanika, izvorima informacija o Beogradu kao turističkoj destinaciji i pitanja otvorenog tipa koja se odnose na turističke atrakcije, pri čemu su ispitanici navodili atrakcije koje su im bile poznate pre dolaska u Beograd i atrakcije koje su posetili tokom svog boravka u njemu. Utvrđeno je da internet predstavlja najčešće korišćeni izvor informacija, a da je Beogradska tvrđava najposećenija atrakcija u gradu. Atrakcije koje je posetio najveći broj ispitanika su pretežno koncentrisane u centralnim delovima grada, dok ostale atrakcije odlikuje manji broj poseta. Rezultati su pokazali da većini turista pojedinačne atrakcije nisu bile poznate pre dolaska, što upućuje na njihovo slabo prisustvo u destinacijskom imidžu.Belgrade is the most visited tourist destination in Serbia, which particularly comes to
prominence in the foreign tourist flow. City's attraction base comprises cultural-historical
heritage, events, natural tourist values with recreational zones and rich nightlife. Aim of this
paper is to provide insight into importance of individual tourist attractions, their spatial
dispersion and their presence in the destination image of Belgrade. In order to research these
problems, a survey was conducted on a sample of 157 foreign tourists. The survey contained
questions regarding socio-demographic characteristics of the respondents, sources of
information about Belgrade and open-ended questions about the tourist attractions, whereby
respondents stated attractions which they were aware of before the visit and attractions which
they visited during their stay in the city. It was established that the Internet was the most
commonly used source of information and that the Belgrade fortress was the most visited
attraction in the city. Attractions which were visited by the biggest number of tourists are
mostly concentrated in the central parts of the city, while the remaining attractions were characterized by a smaller number of visits. Results showed that individual attractions were
not familiar to the majority of tourists before their arrival, which indicates their low presence
in the destination's image.Urednik: Ranko Miri
Soil erosion response to demographic and land use changes in the Nisava river basin, Serbia
No full textIn this paper the relationship between demographic and land use changes and their impact on the intensity of erosion processes in the Nisava River basin is examined by using quantitative typology. For the purposes of quantifying the erosion intensity changes, the erosion potential model (EPM) was used to calculate the annual gross erosion and spatial distribution of soil erosion in study area. The value of the erosion coefficient was reduced from Z(1) = 0.443 in 1971 to Z(2) = 0.356 in 2011. Specific annual gross erosion in the Nisava River basin was 765.3 m(3)/km(2)/year in 1971 while in 2011 it was 533.3 m(3)/km(2)/year. Therefore, due to changes in intensity of erosion processes the specific annual gross erosion in study area was decreased for 232.3 m(3)/km(2)/year. In 40-year period, there were no significant changes in natural conditions, so the anthropogenic influences were responsible for the reduced erosion intensity. Research results indicate three types of population and land use changes with different scale and intensity of erosion process: progressive type with favourable demographic potentials, huge land use transformation and intensive process of soil erosion; stagnant type with advanced agricultural and demographic dimension which imposed pressures to the environment and soil erosion; regressive type and dominant regressive sub-type with depopulation and deagrarization have significant decereasing effect on soil erosion. These results are basis for all integral soil and water management projects, forest ecosystems and environmental protection, spatial planning, agriculture and other human activities
Putevi i naseljena mesta zapadnog balkana na Pojtingerovoj tabli - itineraru
Get PDFRoman conquests and the spread of geographical horizon were simultaneously accompanied by road constructions all over the vast Roman Empire, which encompassed both nearer and distant provinces in countries of all three ancient world continents around the Mediterranean. This paper analyzes the content of the eminent Peutinger's map, which is assumed to be a copy of the original map dating back to the second half of IV century AD referring to the West Balkan peninsula.Sa rimskim osvajanjima i širenjem geografskog horizonta istovremeno i uporedo je išlo i građenje dramova po prostranom Rimskom carstvu, kojima su bile obuhvaćene bliže i dalje rimske provincije u zemljama sva tri kontinenta Starog sveta oko Sredozemlja. U ovom radu analizirana je sadržina znamenite Pojtingerove karte, za koju se pretpostavlja da je kopija originala iz drage polovine IV veka nove ere, koja se odnosi na zapadni deo Balkanskog poluostrva
The First Record of the Freshwater Jellyfish Craspedacusta sowerbii Lankester, 1880 (Hydrozoa) in Kosovo
No full textWe report the first record of the alien freshwater jellyfish Craspedacusta sowerbii in Gazivode Lake, northern Kosovo. Gazivode Lake is a drinking-water reservoir, with a depth of up to 107 m, located on the lbar River. The occurrence of the jellyfish was recorded in August and September 2016. The abundance of the population was estimated at 50-60 ind./m(2) of water surface. The medusae were bell-shaped, with a diameter up to 20 mm and well-defined gonads that indicated mature female specimens