T-duality diagram for a weakly curved background

In one of our previous papers we generalized the Buscher T-dualization procedure. Here we will investigate the application of this procedure to the theory of a bosonic string moving in the weakly curved background. We obtain the complete T-dualization diagram, connecting the theories which are the result of the T-dualizations over all possible choices of the coordinates. We distinguish three forms of the T-dual theories: the initial theory, the theory obtained T-dualizing some of the coordinates of the initial theory and the theory obtained T-dualizing all of the initial coordinates. While the initial theory is geometric, all the other theories are non geometric and additionally nonlocal. We find the T-dual coordinate transformation laws connecting these theories and show that the set of all T-dualizations forms an Abelian group

DOG-HUMAN COMPANIONSHIP - INFLUENCE ON PHYSICAL ACTIVITY, HEALTH STATUS AND QUALITY OF LIFE OF DOG OWNERS

Cilj istraživanja bio je ispitati utječe li prisustvo psa kao kućnog ljubimca na psihofizičku dobrobit, procijenjenu kvalitetu života te razinu tjelesne aktivnosti vlasnika pasa, kao i postoje li statistički značajne razlike na mjerenim varijablama između vlasnika pasa, osoba koje imaju drugog ljubimca i osoba koje uopće nemaju kućnog ljubimca. Također se ispitivao učinak osjećaja obveze za zdravljem psa na razinu tjelesne aktivnosti i zadovoljstva životom vlasnika. U istraživanje je uključeno 236 ispitanika, oba spola, starosti 18 godina i više (srednja dob ispitanika je 40,08 god, a raspon 18-71 god) koji su posjetili jednu od veterinarskih ordinacija na području grada Rijeke sa svojim kućnim ljubimcem za vrijeme trajanja istraživanja. Ispitanici su odgovarali na niz pitanja iz anketnog upitnika posebno sastavljenog za potrebe ovog istraživanja. Pitanja u upitniku odnose se na samoprocjenu zadovoljstva životom ispitanika (PWI), količinu tjelesne aktivnosti (Baecke, IPEQ), procjenu subjektivnih zdravstvenih tegoba ispitanika (SHC), demografskih obilježja ispitanika, demografskih obilježja kućnog ljubimca (psa) te privrženosti životinji (LAPS). Dobiveni rezultati pokazuju da su vlasnici pasa tjelesno aktivniji u slobodno vrijeme od sudionika s drugim ljubimcima (p < 0,001) te sudionika bez ljubimaca (p < 0,001), aktivniji u sportskim aktivnostima (p < 0,001), kao i u ukupnoj tjelesnoj aktivnosti (p < 0,001), dok za tjelesnu aktivnost na poslu nisu pronađene značajne razlike. Na ljestvici subjektivnih zdravstvenih tegoba sudionici sa psima postižu značajno bolje rezultate od sudionika bez kućnih ljubimaca (p = 0,017). Osobe koje su u većoj mjeri privržene svom psu više vremena provode u šetnji (rs = 0.433, p < 0,001), a uočena je i povezanost osjećaja obaveze za zdravlje psa sa satima provedenim u šetnji psa (rs = .311, p < 0,001). Povezanost između privrženosti i vremena provedenog u šetnji nije različita za muškarce i žene (ΔF (1, 125) = 00,006, p = 0.936). Istraživanje pokazuje da psi kao kućni ljubimci donose značajne dobrobiti na psihofizičko zdravlje svojih vlasnika, te da pružaju određeni način socijalne potpore koja potiče vlasnike pasa da češće i duže izlaze u šetnju od osoba koje nemaju psa kao kućnog ljubimca.The aim of this study was to determine whether the dog's presence as a pet affects the psychophysical well-being, the estimated quality of life and level of physical activity of dog owners, as well as whether there are statistically significant differences in measured variables between dog owners, people who have other pets and people who do not have a pet at all. The sense of obligation towards dogs health was also examined as a variable in the level of physical activity and life satisfaction of the dog owner. The study included a total of 236 respondents of both genders, ages 18 years and over (mean age of respondents was 400,08 years, and the range 18-71 years) who visited one of the veterinary clinics in the city of Rijeka with their pets for the duration of the study. Respondents answered a series of questions from the questionnaire specifically drawn up for the implementation of this study. The questions in the questionnaire were related to the life satisfaction (PWI), self-assessment of physical activity (Baecke IPEQ), subjective health complaints respondents (SHC), demographic characteristics of the respondents, the demographic characteristics of a pet (dog) and attachment to the animal (LAPS). The results kave shown that dog owners are significantly more physically active in their leisure time than participants with other animals (p <0,001) and participants without animals (p <0,001). They are also more active in sports activities (p <0,001), as well as in total physical activity (p <0,001). There were not found any significant differences in physical activity at work. On a scale of subjective health complaints, participants with dogs had significantly better results than participants without pets (p = 0,017). People who are more attached to their dog spend more time walking (rs = 0.433, p <0,001). Also, there was a connection in a sense of obligation to the health of a dog with hours spent walking the dog (rs = 0.311, p <0,001). There was also a correlation between sense of obligation to the health of a dog with hours spent walking the dog. The link between commitment and time spent walking was not different for men or women (Q factor (1, 125) = 00,006, p = 0.936). Research shows that dogs bring benefits to the psychophysical health status of their owners. They provide them a certain aspect of social support which encourages the owners in more frequent and longer walks as opposed to people without dog

Preparation and photocatalytic activity of the layered titanates

Titanate structures were synthesized in highly alkaline solution using hydrothermal procedure. As-preparedpowders were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR)and transmission electron microscopy (TEM). A specific surface area of the powders was measured by BETmethod. Results confirmed formation of layered trititanates, already after one hour of hydrothermal synthesis.To examine the photocatalytic activity of the as-prepared layered titanates, methylene blue (MB) was employedas a target compound in response to visible light at ambient temperature. It was observed that the specificsurface area, size distribution and crystallinity are important factors to get high photocatalytic activity for thedecomposition of MB

Influence of the phase composition of refractory materials on creep

In this paper, the relationship between the creeping effect and mineralogical characteristics of the applied binding phase for various refractory materials (high-alumina materials, with high or low impurity content, tar bonded either magnesite or dolomite materials and silicate bonded chrom-magnesite materials) is presented. The mechanism of creeping is analyzed and the activation energy for creep for each investigated material is obtained and discussed. All investigated materials are creep sensitive under investigated conditions and have similar activation energies for creep except high-alumina refractories with a low impurity content

Vrste i prevencija intrahospitalnih infekcija

U ovom radu govorit ćemo o intrahospitalnim infekcijama njihovoj vrsti i prevenciji. Bolničke ili nazokomijalne infekcije su sve infekcije koje se pojavljuju unutar 48 sati od boravka u nekoj bolničkoj ustanovi ili 2 tjedna nakon otpusta il bolnice. Imamo dvije vrste infekcija: endogene i egzogene. Intrahospitalne infekcije se javljaju u svim dobnim skupinama, ali su najčešće kod imunokompromitiranih bolesnika. Uzrok su visokorezistetni mikroorganizmi i njihove spore koji se teško liječe. Najčešće infekcije su: pneumonija, infekcija mokraćnog sustava, sepsa i inficirane rane. Nabrojene su i objašnjene ukratko mjere asepse, antisepse, dezinfekcije i sterilizacije. Dezinfekcija je suprotna sterilizaciji te postoje 4 metode dezinfekcije ( prirodne, mehaničke, kemijske i termičke.) Sterilizacijom se uništavaju svi oblici mikroorganizama i njihovih spora imamo dvije glavne skupine, a to su: fizikalne i fizikalno-kemijske. Higijena ruku je najvažnija metoda u prevenciji bolničkih infekcija. Zaštitna odjeća je također od velikog značaja te svakodnevnom upotrebom uvelike smanjujemo broj infekcija. Spomenuta je i izolacija inficiranih pacijenata kojom se štite bolesnici ali i medicinsko osoblje od zaraze

Sestrinska skrb za osobe s oštećenjem sluha

U ovom radu govorit će se o otežanoj verbalnoj komunikaciji kao sestrinskoj dijagnozi. Kako se sestrinstvo sve više razvija tako se i ovoj dijagnozi pridaje sve više pozornosti. Svi su se kroz život susreli s gluhim ili nagluhim osobama shodno tome ovaj rad je namijenjen da objasni što je to nagluhost/gluhoća, kako ih prepoznati i razlikovati. Također prikazat će moguće uzroke i rizične čimbenike koji dovode do ovog poremećaja slušnog sustava. Kao i za svaku dijagnozu tako i za ovu izrazito je važno pravilno i pravovremeno uzimanje sestrinske anamneze. Nakon što se uspostavi dijagnoza otežane verbalne komunikacije definiraju se ciljevi te se planiraju intervencije potrebne za olakšavanje i podizanje kvalitete života nagluhim/gluhim osobama. Te na samom kraju slijedi evaluacija na postavljene ciljeve

Synthesis and characterization of one-dimensional titanate structure

One-dimensional titania structures were synthesized trough a simple hydrothermal process in a highly alkaline conditions. The aim of this work was to elucidate the effect of time on the formation of 1D titanates as well on its structural characteristics (morphology, phase composition, surface area). Apart from that, the effect of heat treatment conditions on the stability of titanate based 1D samples has been investigated. The results have revealed that it is possible to form one-dimensional titanates already after 1 hour of hydrothermal synthesis. Although the composition of titanates is still under debate, the results probably correspond to the layered sodium titanates. The 1D prepared structures show a remarkable stability during heating, remaining the basic morphology and composition even up to 700°C

CANONICAL APPROACH TO THE CLOSED STRING NON-COMMUTATIVITY

We consider the propagation of the closed bosonic string in the weakly curved background. We show that the closed string non-commutativity is essentially connected to the T-duality and nontrivial background. From the T-duality transformation laws, connecting the canonical variables of the original and T-dual theory, we nd the structure of the Poisson brackets in the T-dual space corresponding to the fundamental Poisson brackets in the original theory. We nd that the commutative original theory is equivalent to the non-commutative T-dual theory, in which Poisson brackets close on winding and momenta numbers and the coecients are proportional to the background uxes