The Gaia-LSST Synergy

We discuss the synergy of Gaia and the Large Synoptic Survey Telescope (LSST) in the context of Milky Way studies. LSST can be thought of as Gaia's deep complement because the two surveys will deliver trigonometric parallax, proper-motion, and photometric measurements with similar uncertainties at Gaia's faint end at $r=20$, and LSST will extend these measurements to a limit about five magnitudes fainter. We also point out that users of Gaia data will have developed data analysis skills required to benefit from LSST data, and provide detailed information about how international participants can join LSST.Comment: Presented at "The Milky Way Unravelled by Gaia", Barcelona, Dec 1-5, 2014; 7 pages, 1 color figur

The spatial model of the classroom and its immediate surroundings: A variety of learning spaces

This paper looks into the spatial dispositions of the classroom and its immediate surroundings in elementary schools, with the goal of defining a broad learning space, in accordance with modern intentions in pedagogy. The starting assumption is that the learning space may offer versatility and a variety of options in the educational process. In the development of the spatial model two key contributing factors have been taken into account: the implications of the modern educational process and potential spatial characteristics. Various levels of spatial interrelationship are considered between the classroom and the adjacent classroom, the break-out space, communication area, social activity zones, and the outdoor classroom. Accordingly, by using the modelling method, a conceptual spatial model of the classroom and its immediate surroundings is defined such that it can receive specific applications in the design of elementary schools

The spatial model of the classroom and its immediate surroundings: A variety of learning spaces

This paper looks into the spatial dispositions of the classroom and its immediate surroundings in elementary schools, with the goal of defining a broad learning space, in accordance with modern intentions in pedagogy. The starting assumption is that the learning space may offer versatility and a variety of options in the educational process. In the development of the spatial model two key contributing factors have been taken into account: the implications of the modern educational process and potential spatial characteristics. Various levels of spatial interrelationship are considered between the classroom and the adjacent classroom, the break-out space, communication area, social activity zones, and the outdoor classroom. Accordingly, by using the modelling method, a conceptual spatial model of the classroom and its immediate surroundings is defined such that it can receive specific applications in the design of elementary schools

On small homotopies of loops

Two natural questions are answered in the negative: (1) If a space has the property that small nulhomotopic loops bound small nulhomotopies, then are loops which are limits of nulhomotopic loops themselves nulhomotopic? (2) Can adding arcs to a space cause an essential curve to become nulhomotopic? The answer to the first question clarifies the relationship between the notions of a space being homotopically Hausdorff and $\pi_1$-shape injective.Comment: 12 pages, 5 figure

Policijski aspekti forenzičkih metoda studije procenta sadržaja vode kod određivanja starosti fresaka

The novels of the Criminal Procedure Code (CPC) Republic of Serbia have introduced the concept of prosecutorial investigation in relation to that of evidence, special evidentiary actions and other software for the operation of the criminal prosecution. The meaning of novels is to conduct harmonization of standards with solutions of modern criminal law practice, particularly with regard to EU standards Serbia applying for membership in the Union. Preventing the most serious forms of crime is the focus of authorized bodies Serbia and in this context combating and preventing all forms of forgery, as is the case with forgeries frescoes and selling them on the world market. In exposed paper the method determining age of the frescoes is proposed. It is based on the use of closed Markov's graphs with three cells. The measurements of contents of water molecules in surrounding area can be done only for the space in which the frescoes is located. This means that followed exposed method is non destructive.Novele o krivičnom postupku (ZKP) Republike Srbije imaju uvodni koncept tužilačke istrage u vezi sa ovim dokazima, posebne dokazne radnje i drugi softver za funkcionisanje krivičnog gonjenja. Značenje novela je da sprovede usklađivanje standarda sa rešenjima savremenog krivičnog zakona u praksi, posebno u vezi sa standardima EU Srbije, koja se prijavljuje za članstvo u Uniji. Sprečavanje najozbiljnijih oblika kriminala je fokus nadležnih organa Srbije i u tom kontekstu je sprečavanje i borba protiv svih oblika falsifikata, kao što je slučaj sa falsifikatima fresaka i umetničkih slika i njihova prodaja na svetskom tržištu. U izloženom radu je predložen metod određivanja starosti fresaka. On se zasniva na korišćenju zatvorenih Markovljevih grafova sa tri ćelije. Merenja sadržaja molekula vode u okolini može se uraditi samo za prostor u kome se nalaze freske. To znači da je sledeći izloženi metod koji se koristi - nedestruktivan

Dust Emission from Active Galactic Nuclei

Unified schemes of active galactic nuclei (AGN) require an obscuring dusty torus around the central source, giving rise to Seyfert 1 line spectrum for pole-on viewing and Seyfert 2 characteristics in edge-on sources. Although the observed IR is in broad agreement with this scheme, the behavior of the 10 micron silicate feature and the width of the far-IR emission peak remained serious problems in all previous modeling efforts. We show that these problems find a natural explanation if the dust is contained in about 5-10 clouds along radial rays through the torus. The spectral energy distributions (SED) of both type 1 and type 2 sources are properly reproduced from different viewpoints of the same object if the visual optical depth of each cloud is larger than about 60 and the clouds' mean free path increases roughly in proportion to radial distance.Comment: 11 pages, submitted to ApJ Letter

Smart grids concept in electrical distribution system

This paper defines key business processes in electrical distribution systems and key elements and priority components that should be (re)defined in these processes in order to enable the goals of smart grids concept to be fulfilled in the cost effective way. Activities undertaken in the Power Distribution Company of “Elektrovojvodina” (Serbia), which provide the basis for fulfilling the Smart Grids goals and thus enable full implementation of smart grids concept are presented in details

Mycotoxins in pathophysiology of cattle diet

Depending on the age and production category, cattle show different sensitivity towards certain mycotoxins. Microflora of the rumen degrades to a different degree and inactivates mycotoxins. In the work are presented the most important mycotoxicoses of cattle caused by fungal metabolites from the genera Fusarium, Aspergillus and Penicillium. Poisoning of cattle in our area is most often caused by Zearalenone, Dioxinivalenol, T-2 toxin, Ochratoxin A and Aflatoxin, but in the work are also presented Fumonisin B1 and B2. The work also describes preventive possibilities and protection of animal health from the effects of mycotoxins

An EPR spin-probe and spin-trap study of the free radicals produced by plant plasma membranes

Plant plasma membranes are known to produce superoxide radicals, while the production of hydroxyl radical is thought to occur only in the cell wall. In this work it was demonstrated using combined spin-trap and spin-probe EPR spectroscopic techniques, that plant plasma membranes do produce superoxide and hydroxyl radicals but by kinetically different mechanisms. The results show that superoxide and hydroxyl radicals can be detected by DMPO spin-trap and that the mechanisms and location of their production call be differentiated using the reduction of spin-probes Tempone and 7-DS. It was shown that the mechanism of production of oxygen reactive species is NADH dependent and diphenylene iodonium inhibited. The kinetics of the reduction of Temponc, combined with scavengers or the absence of NADH indicates that hydroxyl radicals are produced by a mechanism independent of that of superoxide production. It was shown that a combination of the spill-probe and spin-trap technique can be used in free radical studies of biological systems, with a number of advantages inherent to them

Effects of applied herbicides on crop productivity and on weed infestation in different growth stages of sunflower (Helianthus annuus L.)

The level of weed infestation directly affects the intensity of competitive relationship between sunflower crops and weeds. The greatest damage is caused by annual, broad-leaf and invasive weeds, such as Ambrosia artemisiifolia L., Xanthium strumarium L. and Datura stramonium L. Suppression of these weeds is difficult because of deficiency of adequate herbicides and because in years with dry springs, such as in 2009, the use of herbicides gives no results. This two-year study dealt with the observed effects of pre-emergence flurochloridone + s-metolachlor herbicides on the distribution of weeds in different stages of sunflower development. Weed infestation was estimated over the sunflower developmental stages, i.e., in the periods when weeds were removed and when the total fresh and dry biomass of the weed species was determined. Simultaneously, in order to monitor the effects of weeds in dependence on herbicides application and the duration of competition, the sunflower plant height was measured. At the end of the life cycle, the yield and the oil content of the sunflower seeds were established. The total fresh weed biomass changed in dependence on the sunflower developmental stages and was always lower on the herbicide-treated area. This affected the sunflower plant height, yield and the oil content, which were higher, on the average, in the variants with herbicide applications (70.4 cm, 2959.7 kg ha-1 and 42.0%) than in the variants without herbicides application (57.4 cm, 2711.1 kg ha-1 and 40.1%). Weed suppression in the sunflower crop has to be done with adequate herbicides and in due time in order to suppress a significant reduction in morphological and yield parameters