Lactation length and litter size in pigs

Cilj istraživanja je bio procjeniti utjecaj duljine prethodne laktacije na veličinu legla u krmača. Analizirane su tri velike komercijalne farme. Iz analize su isključeni zapisi o leglima kod kojih je duljina laktacije bila dulja od 50 dana ili interval od odbića do koncepcije dulji od 70 dana. U statističkom modelu za broj živooprasene prasadi, duljina laktacije je modelirana na dva načina. Duljina laktacije je prvo modelirana kao linearna regresija duž cijelog intervala, a zatim kao linearna regresija ugnježđena unutar tri intervala (1-17, 18-31, 32-50 dana). Regresijski koeficijenti za duljinu laktacije duž cijelog intervala kretali su se između 0.016 i 0.035. Ocjenjeni regresijski koeficijenti po intervalima su se razlikovali, a na intervalu između 18-tog i 31-og dana su bili viši nego regresijski koeficijenti dobiveni na cijelom intervalu. Međutim, izračunate uzgojne vrijednosti krmača za broj živooprasene prasadi nisu pokazale razliku (r>0.998) između ova dva pristupa. Prema tome, modeliranje duljine laktacije kao linearne regresije duž cijelog intervala čini se dovoljnim.The aim of this study was to evaluate the influence of lactation length on the subsequent litter size. Three commercial farms were analyzed. Litter records with lactation length longer than 50 days and weaning to conception interval longer than 70 days were excluded from analysis. In statistical model for number of piglets born alive, lactation length was fitted on two ways. Firstly, lactation length was fitted as linear regression over whole interval, and secondly as linear regression nested within three intervals (1-17, 18-31, 32-50 days). Estimated regression coefficients over whole interval ranged between 0.016 and 0.035. Estimated regression coefficients by intervals were different. Regression coefficients on the interval from 18 to 31 day were higher than regression coefficients obtained over whole interval (1-50 day). But, predicted breeding value of sows for litter size did not showed any difference (r>0.998) between these two approaches. Therefore, modeling of lactation length as linear regression over whole interval seems to be sufficient

Humidity sensing properties of nanocrystalline pseudobrookite (Fe2TiO5) based thick films

Pseudobrookite based nanopowder was obtained by solid state synthesis of starting hematite and anatase nanopowders in the weight ratio 55:45. Structural and morphological properties were analyzed using X-ray diffraction (XRD), BET, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, UV/Vis diffuse reflectance spectroscopy, Field emission scanning electron microscopy (FESEM) and Transmission electron microscopy (TEM) confirming the formation of nanocrystalline pseudobrookite. The obtained powder was mixed with a binder (ethyl cellulose), dispersant (alpha-terpinol) and adhesion agents (acetic acid and distilled water) to obtain a thick film paste. It was screen printed on alumina substrate with interdigitated PdAg electrodes and fired at 600 degrees C for 30 min. Formation of a porous nanocrystalline thick film structure was shown using Scanning electron microscopy (SEM), while Hall measurements enabled determination of carrier mobility. Change of impedance response in the frequency range 42 Hz-1 MHz with humidity was analyzed at room temperature (25 degrees C) and 50 degrees C in the relative humidity range 30-90% and 40-90%, respectively. At 42 Hz, and room temperature the impedance reduced similar to 28 times, while at 50 degrees C it reduced similar to 147 times in the relative humidity range 40-90%. The sensor showed rapid response (16 s) and relatively low hysteresis (8.39% at 25 degrees C and 2.64% at 50 degrees C) showing that this is a promising material for application in humidity sensing

The politics of performance: transnationalism and its limits in former Yugoslav popular music, 1999–2004

This paper examines transnational relations between the Yugoslav successor states from the point of view of popular music, and demonstrates how transnational musical figures (such as Djordje Balaševi?, Mom?ilo Bajagi?-Bajaga and Ceca Ražnatovi?) are interpreted as symbolic reference points in national ethnopolitical discourse in the process of identity construction. Another symbolic function is served by Serbian turbofolk artists, who in Croatia serve as a cultural resource to distance oneself from a musical genre associated by many urban Croats with the ruralization (and Herzegovinization) of Croatian city space. In addition, value judgements associated with both Serbian and Croatian newly composed folk music provide an insight into the transnational negotiation of conflicting identities in the ex-Yugoslav context. Ultimately the paper shows how the ethnonational boundaries established by nationalizing ideologies created separate cultural spaces which themselves have been transnationalized after Yugoslavia's disintegration