Optimal Levels of Inputs to Control Listeria monocytogenes Contamination at a Smoked Fish Plant

Reducing the incidence of listeriosis from contaminated food has significant social health benefits, but reduction requires the use of additional or higher quality inputs at higher costs. We estimate the impact of three inputs in a food processing plant on the prevalence of L. monocytogenes contaminated finished cold smoked salmon. These three inputs were non-contamination of the raw fish fillets, non-contamination of the plant environment, and rate of glove changes on workers. We then estimate the levels of these inputs to use such that the marginal cost of these inputs become equal to the increased social health benefit of reduction in human listeriosis. Since the costs of these inputs are borne by the food processing plant, which may not be able to secure a higher product price because of asymmetric information, we show how social sub-optimal use of these inputs may result.Food Consumption/Nutrition/Food Safety,

Propagation measurements and estimation of channel propagation models in urban environment

Wireless communication is a telecommunication technology, which enables wireless transmission between the portable devices to provide wireless access in all types of environments. In this research, the measurements and various empirical models are analysed and compared in order to find out a suitable propagation model to provide guidelines for cell planning of wireless communication systems. The measured data was taken in urban region with low vegetation and some trees at 900 MHz frequency band. Path loss models are useful planning tools, which permit the designers of cellular communication to obtain optimal levels for the base station deployment and meeting the expected service level requirements. Outcomes show that these empirical models tend to overestimate the propagation loss. As one of the key outputs, it was observed that the calculations of Weissberger model fit with the measured data in urban environment

An immature B cell population from peripheral blood serves as surrogate marker for monitoring tumor angiogenesis and anti-angiogenic therapy in mouse models

Tumor growth depends on the formation of new blood vessels (tumor angiogenesis) either from preexisting vessels or by the recruitment of bone marrow-derived cells. Despite encouraging results obtained with preclinical cancer models, the therapeutic targeting of tumor angiogenesis has thus far failed to deliver an enduring clinical response in cancer patients. One major obstacle for improving anti-angiogenic therapy is the lack of validated biomarkers, which allow patient stratification for suitable treatment and a rapid assessment of therapy response. Toward these goals, we have employed several mouse models of tumor angiogenesis to identify cell populations circulating in their blood that correlated with the extent of tumor angiogenesis and therapy response. Flow cytometry analyses of different combinations of cell surface markers that define subsets of bone marrow-derived cells were performed on peripheral blood mononuclear cells from tumor-bearing and healthy mice. We identified one cell population, CD45dimVEGFR1⁻CD31low, that was increased in levels during active tumor angiogenesis in a variety of transgenic and syngeneic transplantation mouse models of cancer. Treatment with various anti-angiogenic drugs did not affect CD45dimVEGFR1⁻CD31low cells in healthy mice, whereas in tumor-bearing mice, a consistent reduction in their levels was observed. Gene expression profiling of CD45dimVEGFR1⁻CD31low cells characterized these cells as an immature B cell population. These immature B cells were then directly validated as surrogate marker for tumor angiogenesis and of pharmacologic responses to anti-angiogenic therapies in various mouse models of cancer

Mokro podvodno zavarivanje

U teorijskom dijelu rada opisan je REL postupak mokrog podvodnog zavarivanja. Objašnjene su fizikalne osnove procesa te problemi i greške koji se pojavljuju kod mokrog podvodnog zavarivanja. Detaljno je opisana oprema za zavarivanje i oprema za zavarivača-ronioca te su ukazane opasnosti kojima su izloženi zavarivači-ronioci. U eksperimentalnom dijelu, koji je izveden u Laboratoriju za zavarivanje, Fakulteta strojarstva i brodogradnje mokrim podvodnim zavarivanjem REL postupkom zavaren je preklopni spoj iz osnovnog materijala S235JR. Nakon zavarivanja izuzeta su dva uzorka na kojima je određena geometrija zavara te je izveden je vizualni pregled i ocjenjena je prihvatljivost zavarenih spojeva prema normi AWS D3.6M:1999

Srednjovjekovna sakralna arhitektura Varaždinsko-topličkog dekanata

Prostor Varaždinsko– topličkog dekanata u srednjem vijeku proživljava burne povijesne događaje koji bitno utječu na topografiju sakralne arhitekture koja je prikazana u ovom radu. Ranosrednjovjekovne tragove sakralne arhitekture u ovom stupnju istraženosti nije moguće dokazati na prostoru Varaždinsko-topličkog dekanata. Prvi pisani spomeni sakralne arhitekture na obrađivanom području sežu od 13. stoljeća. Dio obrađenih srednjovjekovnih sakralnih objekata danas je isključivo prisutan u povijesnim izvorima. Većina očuvanih srednjovjekovnih sakralnih objekata Varaždinsko- topličkog dekanata datira od 15. stoljeća kada je došlo do uzleta u gradnji ali i pojave crkvenih redova. Svi obrađeni sakralni objekti građeni su od čvrstih materijala što je svakako pod utjecajem dobre sirovinske osnove u kamenu. Crkva Blažene Djevice Marije Kraljice Svete Krunice u Remetincu je jedina crkva Varaždinsko-topličkog dekanata koja je građena od pravilnih kamenih blokova što je i rijetkost na prostoru SZ Hrvatske. U radu imamo primjer utvrde Grebengrad u kojoj se kapela nalazila unutar zidina utvrde kako je to bilo i kod većina utvrda s kapelom. Većina obrađenih lokaliteta je neistražena, dijelom zbog propusta nadležnih službi, a dijelom zbog nedovoljnog znanja o njima. Zbog neistraženosti većina zaključaka ostaje na razini pretpostavke dok ih buduća interdisciplinarna istraživanja ne provjere

VISOKO GOSPODARSKO UČILIŠTE U KRIŽEVCIMA PRILOG OBRAZOVANJU ZA ODRŽIVU I EKOLOŠKU POLJOPRIVREDU

The paper presents an overview of the role of the Križevci College of Agriculture within the professionally-oriented higher education and its contribution to sustainable and organic agriculture education. It gives a brief description of the past and present-day College focusing on its current agriculture study courses, i.e. the three-year professional courses (bachelor level), two-year specialist graduate professional course titled Sustainable and Organic Agriculture (master level) and specialist seminars as part of lifelong learning.Rad daje pregled uloge koju ima Visoko gospodarsko učilište u Križevcima u području stručnih studija za poljoprivredu u Hrvatskoj i doprinos visokoškolskom obrazovanju za održivu i ekološku poljoprivredu. U radu se također donosi kratki opis povijesnoga razvoja križevačkoga Učilišta i opis suvremenih studijskih programa na razini stručnog i specijalističkog diplomskog studija te specijalističkih seminara u sklopu cjeloživotnoga učenja