Economic efficiency of peach and nectarine production: a case study

Cilj rada bio je utvrditi ekonomsku efikasnost proizvodnje breskve i nektarine u odabranom poljoprivrednom gospodarstvu koje se nalazi u naselju Smilčić na području grada Benkovca u Zadarskoj županiji. Na temelju podataka prikupljenih anketiranjem i poslovne dokumentacije gospodarstva izrađena je kalkulacija pokrića varijabilnih troškova za 2007. i 2008. godinu. Kalkulacijom utvrđeni troškovi i prihodi predstavljali su podlogu za izračunavanje relevantnih ekonomskih veličina i pokazatelja. Ukupna površina voćnjaka breskve i nektarine je 6,5 ha, od čega je 6 ha rodni, a 0,5 ha mladi voćnjak. U 2007. godini poljoprivredno gospodarstvo ostvarilo je dohodak u iznosu od 121.421,00 kn, a u 2008. godini u iznosu od 192.105,00 kn. Vrijednosti ekonomskih pokazatelja proizvodnosti rada, ekonomičnosti i rentabilnosti pokazuju da je proizvodnja breskve i nektarine u analiziranom gospodarstvu bila ekonomski efikasna tijekom dvogodišnjeg razdoblja.The aim of the paper was to determine economic efficiency of peach and nectarine production in the selected farm in the rural settlement of Smilčić in the area of Benkovac town in the County of Zadar. Based on the data from the survey and on the business documents of the farm, a gross margin calculation was made for 2007 and 2008. Costs and revenues determined by calculation were the basis for calculation of relevant economic indicators. The total surface of the peach and nectarine orchard is 6.5 ha, out of which 6 ha is in production period, and 0.5 ha is young peach and nectarine orchard. In 2007 the farm realised an income of 121,421.00 HRK, and in 2008 an income of 192,105.00 HRK. The values of economic indicators of labour productivity, cost-effectiveness and profitability show that the production of peach and nectarine in the analysed farm was economically efficient in the two-year period

THE PROCEDURE AND THE CRITERIA FOR FISH CAGES ALLOCATION

Kavezni uzgoj ribe u Republici Hrvatskoj jedna je od važnijih gospodarskih djelatnosti. Postavljanjem kaveza za uzgoj neizbježno se mijenja kakvoća morskog okoliša. Radi što manjeg narušavanja biostabilnosti donesene su mjere zaštite okoliša. Cilj je ovoga rada prikazati postupak koji prethodi postavljanju kaveza na planiranoj uzgojnoj lokaciji, te mjere zaštite okoliša, kao i programa praćenja stanja okoliša pri izgradnji uzgajališta bijele ribe.In the Republic of Croatia, fish cage farming is one of the most important economic activities. Fish cage farms inevitably influence the quality of marine environment. Environment protection measures are established in order to minimize negative effects on the stability of ecosystem. The aim of this paper is to give an overview on the procedure of fish cage farm allocation, environment protection measures, as also as program of monitoring before, during and after fish farming allocation

Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

International audienceIntermediate-mass black holes (IMBHs) span the approximate mass range 100−105 M⊙, between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∼150 M⊙ providing direct evidence of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200 M⊙ and effective aligned spin 0.8 at 0.056 Gpc−3 yr−1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc−3 yr−1.Key words: gravitational waves / stars: black holes / black hole physicsCorresponding author: W. Del Pozzo, e-mail: [email protected]† Deceased, August 2020