Uloga nautičkog turizma u održivom razvoju Crne Gore

In the last quarter of the twentieth century, Montenegro, by virtue of tourism development, finally came up with an opportunity to valorize exceptional natural beauties and thus provide significant revenues for the national economy. However, although in that period, in the developed Mediterranean destinations and in America, nautical tourism, as one of the forms of tourism, recorded exceptional growth rates, in Montenegro, this segment of the tourist offer has begun to develop more seriously in the last ten years. Growth and development of nautical tourist offer in Montenegro is not the result of strategic planning activities, but the epilogue of individual initiatives of private investors, which calls into question the future sustainability of this process. Purpose of research – The purpose of research in the subject doctoral dissertation is firstly reflected in providing a comprehensive insight into the chronology of development and the state of nautical tourism as part of a complex economic phenomenon such as tourism in general. After describing the role of tourism in Montenegro, the research focuses on establishing a relationship between the development of nautical tourism and the previously established principles of sustainable development in Montenegro. The ultimate intention is to emphasize the importance of applying the principles of sustainability in all development stages of nautical tourism on the Montenegrin part of the Adriatic. Research design - Empirical research was carried out by processing and analyzing data from primary and secondary sources. Data obtained from secondary sources are the basis for establishing projections of future trends, while data from primary sources, collected by surveying 116 stakeholders in the period from 2012 to the end of 2017, were put into the function of testing the previously defined expectations. Research findings - After evaluating the role of tourism in general and nautical in particular, it was established that these activities are of strategic importance for the economy of Montenegro, and that they represent one of the foundations of future prosperity, only if they are realized in accordance with the principles of sustainable development. Significance of research - Since nautical tourism is relatively poorly explored in Montenegro, the significance of this research is reflected in a comprehensive analysis of this developmental phenomenon, on the basis of which appropriate conclusions were made, along with recommendations for future activities within the framework of reasonably observed sustainable parameters, on a specific tourist destination - Montenegrin coast

Organ donation and ownership of body parts: Protection of bodily integrity

Bodily integrity is one of the main areas of interest for organ transplantation. The transfer of one human organ from one body to another is a matter of the bodily integrity of the human. The focus of the work is on the treatment of the human body in situations when it is necessary to make decisions on organ donation, in one's own and others' best interests. In this context, the possibility of an equal right to bodily integrity is considered, as well as the possibility of ownership of the body. The paper will consider legislation and court cases of the European Union member states concerning the situation in the Republic of Serbia. The final part of the paper concludes about the roles that individual participants in the process of organ donation should play in modern circumstances

Influence of nuclear radiation and laser beams on optical fibers and components

The influence of nuclear radiation and particles has been the object of investigation for a long time. For new materials and systems the research should be continued. Human activities in various environments, including space, call for more detailed research. The role of fibers in contemporary communications, medicine, and industry increases. Fibers, their connections and fused optics components have one type of tasks - the transmission of information and power. The other type of tasks is reserved for fiber lasers: quantum generators and amplifiers. The third type of tasks is for fiber sensors, including high energy nuclear physics. In this paper we present some chosen topics in the mentioned areas as well as our experiments with nuclear radiation and laser beams to fiber and bulk materials of various nature (glass, polymer, metallic, etc.)

UČINAK SELEKCIJE SNIŽENJA STABLJIKE NA UROD I KOMPONENTE URODA ZRNA JEČMA

This investigation deals with the effects of selection for short stem in population lines of the F4 generation derived from the barley cross between Timura x Osk. 4.208´2-84 developed by the single seed descent and pedigree method. Direct genetic gain from reducing the stem length was found to be 10.22 % at dense planting (400 kernels/m2) and 11.47 % at wide-spaced planting (100 kernels/m2). It was found that stem length had relatively high heritability (0.643 and 0.735). Large negative effects of reducing the stem length at wide-spaced and dense planting were estimated for the grain yield per plant, grain yield per plot and number of fertile tillers. Less pronounced negative effects were found for the grain weight per spike and grain number per spike. Phenotypic and genotypic correlations between stem length and other traits were mostly significant and positive with higher values at dense planting. Selection for a short stem length was efficient for the improvement of this trait. However, unfavorable correlations have significantly affected undesired expression of other traits, especially grain yield per plant, grain yield per plot and number of fertile tillers. Any further decrease of plant height should be accompanied by the appropriate selection for other traits, especially grain yield per plant, mass of one grain and harvest index.U radu su istraženi učinci selekcije na kraću stabljiku kod ječma u populaciji linija F4 generacije izvedene iz kombinacije križanja Timura x Osk.4.208´2-84 pomoću metode potomstva sjemenke po biljci (SSD) i pedigree metode. Ostvarena izravna genetska dobit sniženja stabljike bila je 10,22 % u gustoj sjetvi (400 zrna/m2 ) i 11,47 % u rijetkoj sjetvi (100 zrna/m2 ). Utvrđeno je da je dužina stabljike svojstvo relativno visokog heritabiliteta (0,643 i 0,735). Jaki negativni učinci sniženja dužine stabljike u rijetkoj i gustoj sjetvi procijenjeni su za urod zrna po biljci, urod zrna po parceli i broj plodnih vlati. Manje naglašeni negativni učinci utvrđeni su za masu zrna po klasu i broj zrna po klasu. Fenotipske i genotipske korelacije između dužine stabljike i drugih svojstava bile su uglavnom značajne i pozitivne s višim vrijednostima u gustoj sjetvi. Selekcija na skraćenje stabljike bila je učinkovita za poboljšanje toga svojstva. Međutim, nepovoljne korelacije značajno su utjecale na neželjenu ekspresiju drugih svojstava, naročito na urod zrna po biljci, urod zrna po parceli i broj plodnih vlati. Daljnje snižavanje visine stabljike trebalo bi biti praćeno i odgovarajućom selekcijom na druga svojstva, posebno urod zrna po biljci, masu zrna i žetveni indeks

UČINAK SELEKCIJE SNIŽENJA STABLJIKE NA UROD I KOMPONENTE URODA ZRNA JEČMA

This investigation deals with the effects of selection for short stem in population lines of the F4 generation derived from the barley cross between Timura x Osk. 4.208´2-84 developed by the single seed descent and pedigree method. Direct genetic gain from reducing the stem length was found to be 10.22 % at dense planting (400 kernels/m2) and 11.47 % at wide-spaced planting (100 kernels/m2). It was found that stem length had relatively high heritability (0.643 and 0.735). Large negative effects of reducing the stem length at wide-spaced and dense planting were estimated for the grain yield per plant, grain yield per plot and number of fertile tillers. Less pronounced negative effects were found for the grain weight per spike and grain number per spike. Phenotypic and genotypic correlations between stem length and other traits were mostly significant and positive with higher values at dense planting. Selection for a short stem length was efficient for the improvement of this trait. However, unfavorable correlations have significantly affected undesired expression of other traits, especially grain yield per plant, grain yield per plot and number of fertile tillers. Any further decrease of plant height should be accompanied by the appropriate selection for other traits, especially grain yield per plant, mass of one grain and harvest index.U radu su istraženi učinci selekcije na kraću stabljiku kod ječma u populaciji linija F4 generacije izvedene iz kombinacije križanja Timura x Osk.4.208´2-84 pomoću metode potomstva sjemenke po biljci (SSD) i pedigree metode. Ostvarena izravna genetska dobit sniženja stabljike bila je 10,22 % u gustoj sjetvi (400 zrna/m2 ) i 11,47 % u rijetkoj sjetvi (100 zrna/m2 ). Utvrđeno je da je dužina stabljike svojstvo relativno visokog heritabiliteta (0,643 i 0,735). Jaki negativni učinci sniženja dužine stabljike u rijetkoj i gustoj sjetvi procijenjeni su za urod zrna po biljci, urod zrna po parceli i broj plodnih vlati. Manje naglašeni negativni učinci utvrđeni su za masu zrna po klasu i broj zrna po klasu. Fenotipske i genotipske korelacije između dužine stabljike i drugih svojstava bile su uglavnom značajne i pozitivne s višim vrijednostima u gustoj sjetvi. Selekcija na skraćenje stabljike bila je učinkovita za poboljšanje toga svojstva. Međutim, nepovoljne korelacije značajno su utjecale na neželjenu ekspresiju drugih svojstava, naročito na urod zrna po biljci, urod zrna po parceli i broj plodnih vlati. Daljnje snižavanje visine stabljike trebalo bi biti praćeno i odgovarajućom selekcijom na druga svojstva, posebno urod zrna po biljci, masu zrna i žetveni indeks

Spectral Optical Monitoring of the Narrow Line Seyfert 1 galaxy Ark 564

We present the results of a long-term (1999--2010) spectral optical monitoring campaign of the active galactic nucleus (AGN) Ark 564, which shows a strong Fe II line emission in the optical. This AGN is a narrow line Seyfert 1 (NLS1) galaxies, a group of AGNs with specific spectral characteristics. We analyze the light curves of the permitted Ha, Hb, optical Fe II line fluxes, and the continuum flux in order to search for a time lag between them. Additionally, in order to estimate the contribution of iron lines from different multiplets, we fit the Hb and Fe II lines with a sum of Gaussian components. We found that during the monitoring period the spectral variation (F_max/F_min) of Ark 564 was between 1.5 for Ha to 1.8 for the Fe II lines. The correlation between the Fe II and Hb flux variations is of higher significance than that of Ha and Hb (whose correlation is almost absent). The permitted-line profiles are Lorentzian-like, and did not change shape during the monitoring period. We investigated, in detail, the optical Fe II emission and found different degrees of correlation between the Fe II emission arising from different spectral multiplets and the continuum flux. The relatively weak and different degrees of correlations between permitted lines and continuum fluxes indicate a rather complex source of ionization of the broad line emission region.Comment: Accepted for publication in ApJ

Anatomy and radiology of the variations of aortic arch branches in 1,266 patients

Background: The most reliable data about arterial variations, which are very important in surgery and radiology, can be obtained from a large series of patients.Materials and methods: We examined angiographic and multislice computerised tomography (MSCT) images in a group of 1,265 patients and in 1 dissected specimen.Results: While in 946 (74.72%) of the patients a normal vascular pattern (type I) was noticed, in the remaining 320 (25.28%) patients variations of the branchesof the aortic arch were found, which were classified into types II through VIII and a few subtypes. Type II (2.84%) comprised a common origin of the left commoncarotid and subclavian arteries. Type III (15.56%) was related to an origin of the left subclavian artery from the brachiocephalic trunk. Type IV (0.55%) includedthe aortic origin of both common carotid and subclavian arteries, with the rightsubclavian artery having a retroesophageal course. Type V (0.24%) included thesame 4 supra-aortic branches, which, however, arose from a double or a right--sided aortic arch. Type VI (3.63%) comprised the aortic origin of the left vertebralartery, type VII (0.24%) the same origin of the right vertebral artery, and type VIII(2.22%) the aortic origin of the thyroideaima artery. A corresponding embryological background and clinical implications of the described aberrant vessels were presented.Conclusions: In more than one quarter of the cases, the branching pattern of the examined arteries did not follow the classical pattern. Detailed knowledge of aortic branch variations is of great significance in anatomy, embryology, andclinical medicine, especially in radiology and thoracic surgery

Structural and thermodynamic analysis of whiskers on the surface of grey cast iron

The paper focuses, first, on the characterization of the whiskers on the surface of grey cast iron and second, it gives an explanation of whiskers growth based on thermodynamic calculations. The whiskers were observed on the surface of hot plates for the electric stove after black-oxide-coating (blackening) performed the furnace at 650°C in order to produce a protective layer mainly of magnetite (Fe3O4). However, the whiskers caused brown spots on dark grey surface and thus, the surface was aesthetically damaged. The investigations confirmed that whiskers are of hematite (Fe2O3); however, the thermodynamic calculations present that hematite may be formed as a result of the oxidation of magnetite if the partial pressure of oxygen is increased during the blackening

Compatibility Relationships in \u27Tugarka\u27 Sweet Cherry (Prunus avium L.)

\u27Tugarka\u27 je najzastupljenija sorta trešnje u mediteranskom dijelu Hrvatske. Jedan od uzroka njene neredovite rodnosti je loš uspjeh oprašivanja s inkompatibilnim sortama prisutnim u nasadima. Analizirana je uspješnost zametanja plodova nakon samooprašivanja, stranooprašivanja i slobodnog oprašivanja sorte Tugarka, te su izdvojeni njeni najbolji oprašivači. U ulozi oprašivača, u istraživanje su uključene sorte Lambert compact, Bing spur, Van compact i višnja maraska \u27Poljička\u27, koje su istovremeno cvjetale sa glavnom istraživanom sortom. Uspjeh klijavosti polena analiziran je metodom viseće kapi u 12% otopini saharoze pri temperaturi od 22ºC. Klijavost polena sorti oprašivača zabilježena je u rasponu od 35% (\u27Van compact\u27) do 41.04% (\u27Bing spur\u27). Zbog izostanka zametanja plodova nakon samooprašivanja \u27Tugarka\u27 je opisana kao autoinkompatibilna sorta. Značajno najveći uspjeh zametanja plodova kod sorte Tugarka zabilježen je nakon oprašivanja sa sortom Lambert compact (22.5%), a najmanji nakon oprašivanja sa višnjom maraskom \u27Poljička\u27 (14.2%).\u27Tugarka\u27 is most presented cultivar grown in orchards of Mediterranean part of Croatia. Inadequate pollination caused irregular yield of that valuable cultivar. The aim of this study was to determinate the success of self-pollination, cross-pollination and free-pollination of \u27Tugarka\u27, and to define its best pollenizer(s). Cultivars used as pollen donors, \u27Lambert compact\u27, \u27Bing spur\u27, \u27Van compact\u27, and sour cherry marasca \u27Poljička\u27, were selected according to their simultaneous flowering period with \u27Tugarka\u27. Pollen germination of tested cultivars was determined in 12% sucrose solution at 22ºC using hanging drop technique. Controlled pollinations with pollen of each pollenizer were carried out during the full bloom. Fruit set following selfpollination, cross-pollination and free-pollination was analysed just before the harvest. Pollen germination rates varied from 35% (\u27Van compact\u27) to 41.04% (\u27Bing spur\u27). Absence of fruit set following self-pollination described \u27Tugarka\u27 as self-incompatible cultivar. Significantly the best fruit set of \u27Tugarka\u27 was recorded after the pollination with \u27Lambert compact\u27 (22.5%), and the lowest following pollination with sour cherry \u27Poljička\u27 (14.2%)