Direct Photon and Heavy Quark Jet Production at the LHC

The associated production of direct photons and heavy quarks at the LHC is presented. Predictions for the nuclear modification factor to the cross-section at ALICE are shown. It is demonstrated that this process is a great probe of the gluon and heavy quark nuclear PDFs, as over 80 % of its nPDF dependence at NLO comes from those nPDFs. Therefore measurements of this process will provide an excellent constraint on the gluon nPDF, and will distinguish between different nPDF sets currently out on the market.Comment: Proceedings for ICHEP 201

Heavy quark & direct photon production and heavy quark parton densities

Direct photon production in association with a heavy quark can serve as an excellent tool for the study of the heavy quark distributions. Currently it is believed that heavy quarks are produced radiatively inside the nucleon, and so there is no need to take into account heavy quark parameters inside global PDF analyses. Certain models taking into account the possibility of an intrinsic charm component exist. Here we present how these affect the \gamma + c cross section. While at pA collisions the potential of this process to constrain the gluon nuclear PDF which is currently largely unconstrained is presented.Comment: Quarkonium 2010 Proceeding

Constraining the Intrinsic Heavy Quark PDF via Direct Photon Production in Association with a Heavy Quark Jet

We investigate a possible use of direct photon production in association with a heavy quark to test different models of intrinsic heavy quark parton distribution function (PDF) at the Tevatron, at the large hadron collider (LHC) and at RHIC.Comment: 4 pages, to appear in proceedings of DIS201

Prompt photon in association with a heavy-quark jet in Pb-Pb collisions at the LHC

We present a phenomenological study of the associated production of a prompt photon and a heavy quark jet (charm or bottom) in Pb-Pb collisions at the LHC. This channel allows for estimating the amount of energy loss experienced by the charm and bottom quarks propagating in the dense QCD medium produced in those collisions. Calculations are carried out at next-to-leading order (NLO) accuracy using the BDMPS-Z heavy-quark quenching weights. The quenching of the single heavy-quark jet spectrum reflects fairly the hierarchy in the heavy quark energy loss assumed in the perturbative calculation. On the contrary, the single photon spectrum in heavy-ion collisions is only modified at low momenta, for which less heavy-quark jets pass the kinematic cuts. On top of single particle spectra, the two-particle final state provides a range of observables (photon-jet pair momentum, jet asymmetry, among others) which are studied in detail. The comparison of the photon-jet pair momentum, from p-p to Pb-Pb collisions, is sensitive to the amount of energy lost by the heavy-quarks and could therefore be used in order to better understand parton energy loss processes in the heavy quark sector.Comment: 22 pages, 18 figures, gzipped tar file. Minor changes, 2 references added. Version published in JHE

Risk assessment of hygienic air quality upon preschool children’s health in kindergarten “Vera Ciriviri Trena” in Shtip

The paper will present the results of routine sanitary-hygienic controls of the air hygiene at the study halls and bedrooms of Branch 1 and Branch 4 in the kindergarten "Vera Ciriviri - Trena" in Shtip. The controls were carried out in the period from 2009 to 2014. Aero sediments were taken from premises at random in time after airing, when there is no movement. At the time of setting the plates for aero sediment the children were already asleep so the air dustiness is less and the sedimentation lasted two hours. In all samples the presence of microorganisms was proved as number of colonies, such as: pathogenic staphylococci and conditionally pathogenic staphylococci coagulase negative and the presence of germs. Results show that the greatest source of air pollution of the premises is the retention of impurities that are the source of bacteria, viruses, molds and mites in Sintelon carpets that do not really allow for proper and thorough hygiene of floors. Although the floors are regularly cleaned by mechanical and wet cleaning and regular and appropriate disinfection, it is still no

Basic aspects of the ecological culture among children from pre-school and early school

Despite the existence of pedagogy as an independent science and her direct influence on ecological education, her global aspect is still superficial known and analyzed. It is not yet created a complete theory of ecological education, because the spheres in which it is accomplished are different. The question arises - How to interpret ecological education as an ecological phenomenon, and its organization and realization as a specific ecological-pedagogical process? This deepened integral and broad spectrum analysis,sets out one basic ecological law of the educational process in whose basis lies a specific model of ecological education. It makes the system of scientific facts, conclusions and hypotheses very thorough and paves the way for ecology and ecological education to develop

WHY DO CHILDREN SPEND LESS TIME IN THE NATURAL ENVIRONMENT?

this paper we represent the results from research made on children from 3-7 years old age in kindergartens in urban and rural environment. Results are statistically processed from which the results obtained give us the conclusion about the connection of the children with the natural environment.This natural connection has been replaced in various ways – greater interaction with the digital (‘plugged-in’) world, less unstructured outdoor play, and via growing urbanization. This decreased exposure to nature has consequences that we are just beginning to understand. Research across disciplines now suggests that this disconnect (both figurative and literal) has far-reaching consequences for the health and well-being of both individuals and the natural environment in which they act. Children are smarter, cooperative, happier and healthier when they have frequent and varied opportunities for free and unstructured play in the outdoors.Key words: children, nature, natural world, natural connection, kindergartens

“WHY IS ENVIRONMENTAL EDUCATION IMPORTANT FOR CHILDREN IN THE 21ST CENTURY?”

In this study, we will examine why preschool environmental education is important in the 21st century. Within the scope, I benefited from many studies and articles and included important opinions. In order to understand the subject well, I first explained the subjects of environment and what is environmental education. I talked about why environmental education is important in preschool and what conditions should be met for children. I included exemplary activities to improve environmental education in preschool. I researched what has changed in environmental education in this century and why environmental education is important. Finally, I expressed my own ideas and views on environmental education in the 21st century