UČINAK DVIJU DE-ADHEZIJSKIH METODA NA REPRODUKTIVNA SVOJSTVA MORUNE, Huso huso

This study was carried out to compare the effects of two egg de-adhesion methods including use of tannic acid and clay suspension on reproductive parameters of beluga. For this purpose, one treatment with eggs treated with tannic acid and one control group with eggs treated with clay with 4 replications was performed. According to results, the duration of adhesion removal procedure was 45 min for eggs treated with clay while this duration was 1:30 min for eggs treated with tannic acid. Also, the fertilization percent, hatching percent and survival percent of alevins were higher for eggs treated with tannic acid compared to eggs treated with clay suspension. Furthermore, the fungal pollution rate was higher for eggs treated with clay suspension than tannic acid treatment. Results of the research indicate egg de-adhesion by tannic acid as more efficient than clay suspension in terms of time saving and reproductive success of beluga.Ovo istraživanje je provedeno kako bi se usporedio efekt dviju de-adhezijskih metoda, uključujući korištenje tanina i suspenzije gline na reproduktivna svojstva morune. U tu svrhu provedena su 4 ponavljanja tretmana odljepljivanja ikre taninskom kiselinom i glinom koja je služila kao kontrola. Prema rezultatima, trajanje postupka odljepljivanja ikre iznosilo je 45 min za ikru tretiranu glinom, dok je za ikru tretiranu taninskom kiselinom iznosilo 1,5 minuta. Također, postotak oplodnje i postotak preživljavanja izvaljenih ličinki bio je veći za ikru tretiranu taninom u odnosu na ikru tretiranu suspenzijom gline. Također, gljivični postotak onečišćenja kod ikre tretirane suspenzijom gline je bio veći nego kod tretmana s taninskom kiselinom. Rezultati istraživanja ukazuju da je tretiranje ikre taninskom kiselinom učinkovitije nego suspenzijom gline zbog kraćeg trajanja odljepljivanja i boljeg reproduktivnog uspjeha

The relationship between job satisfaction and self-esteem in teachers: A case study in Aliabad University

The main goal of this research is to investigate the relationship between self-esteem and job satisfaction of teachers in Aliabad University. For this purpose, 40 teachers were selected randomly. In this study, the measurement tools of job satisfaction was a measuring job satisfaction research questionnaire and Cooper Smith's measurement tool used for self-esteem. The reliability of job satisfaction questionnaire was 85% and the self-esteem was 80 % and their validity was confirmed by an expert. Statistical software SPSS was used for data analysis. To investigate the main hypothesis of study, Pearson correlation test was used, and for sub- test hypothesis, independent t-test was used. The results indicated that there is a significant difference between job satisfaction and self-esteem in Aliabad academic teachers. State teachers' job satisfaction was higher than those who are non-State. Finally, State teachers’ self esteam is higher than, those who are non-State

A novel iterative optimization algorithm based on dynamic random population

U umjetnoj inteligenciji razvijene su različite heurističke metode optimalizacije. Te su metode uglavnom potaknute prirodnom evolucijom ili nekim primjenljivim inovacijama koje traže dobra (gotovo optimalna) rješenja uz razumnu računalnu cijenu za istraživane probleme. U radu se predlaže novi iterativni algoritam optimalizacije. Algoritam se zasniva na pretraživanju najvrednijeg dijela područja rješenja, koje je uobičajeno koncentrirano oko ciljanog (bias) vektora (u obliku dinamične slučajne populacije). Taj algoritam nezasitno pretražuje prostor rješenja u potrazi za globalnim ekstremom. Usporedba rezultata predloženog algoritma i nekih poznatih heurističkih metoda pretraživanja potvrđuje superiornost naše predložene metode u rješavanju različitih nelinearnih problema optimalizacije sa stajališta jednostavnosti i točnosti.Various heuristic optimization methods have been developed in artificial intelligence. These methods are mostly inspired by natural evolution or some applicable innovations, which seek good (near-optimal) solutions at a reasonable computational cost for search problems. A new iterative optimization algorithm is proposed in this paper. The algorithm is based on searching the most valuable part of the solution space, which is normally concentrated about a targeted bias vector (in the form of a dynamic random population). This algorithm greedily searches the solution space for global extremum. The comparison results between the proposed algorithm and some of the well-known heuristic search methods confirm the superiority of our proposed method in solving various non-linear optimization problems from the viewpoint of simplicity and accuracy

Isoenzymatic pattern of glucose-6-phosphate dehydrogenase and isocitrate dehydrogenase in Iranian Echinococcus granulosus

Morphology and genetic studies of Echinococcus granulosus have indicated that there are 2 different strains of this parasite in Iran, ovine and camel. However, no study has been carried out to date on the phenotypic characterization of this parasite. In the present study the electrophoretic pattern of glucose-6-phosphate dehydrogenase (G6PD) and isocitrate dehydrogenase (ICD) was demonstrated. In this study isolates of ovine and camel hydatid cysts were collected from slaughterhouses across Iran. Hydatid fluid and hydatid sand were separated and collected. The fluid was concentrated and the protoscoleces from the sand were extracted. The amount of total protein in protoscoleces and concentrated hydatid fluid was determined. Electrophoretic pattern of extract was indicated by SDS-PAGE. Non-denaturating electrophoresis was also used for study of electrophoretic pattern of G6PD and ICD; so that major and minor enzyme activities were indicated. Densitometry of electrophoretic pattern indicated 2 major bands for each of these enzymes in camel and sheep with the same pattern in the extract of protoscoleces and hydatid fluid. Based on the fact that the band of enzymes in each of 2 isolates has different molecular patterns; we propose that these represent the 2 different strains (sheep-dog and camel-dog) of this parasite in Iran

Isoenzymatic pattern of glucose-6-phosphate dehydrogenase and isocitrate dehydrogenase in Iranian Echinococcus granulosus

Morphology and genetic studies of Echinococcus granulosus have indicated that there are 2 different strains of this parasite in Iran, ovine and camel. However, no study has been carried out to date on the phenotypic characterization of this parasite. In the present study the electrophoretic pattern of glucose-6-phosphate dehydrogenase (G6PD) and isocitrate dehydrogenase (ICD) was demonstrated. In this study isolates of ovine and camel hydatid cysts were collected from slaughterhouses across Iran. Hydatid fluid and hydatid sand were separated and collected. The fluid was concentrated and the protoscoleces from the sand were extracted. The amount of total protein in protoscoleces and concentrated hydatid fluid was determined. Electrophoretic pattern of extract was indicated by SDS-PAGE. Non-denaturating electrophoresis was also used for study of electrophoretic pattern of G6PD and ICD; so that major and minor enzyme activities were indicated. Densitometry of electrophoretic pattern indicated 2 major bands for each of these enzymes in camel and sheep with the same pattern in the extract of protoscoleces and hydatid fluid. Based on the fact that the band of enzymes in each of 2 isolates has different molecular patterns; we propose that these represent the 2 different strains (sheep-dog and camel-dog) of this parasite in Iran

The relationship between job satisfaction and self-esteem in teachers: A case study in Aliabad University

The main goal of this research is to investigate the relationship between self-esteem and job satisfaction of teachers in Aliabad University. For this purpose, 40 teachers were selected randomly. In this study, the measurement tools of job satisfaction was a measuring job satisfaction research questionnaire and Cooper Smith's measurement tool used for self-esteem. The reliability of job satisfaction questionnaire was 85% and the self-esteem was 80 % and their validity was confirmed by an expert. Statistical software SPSS was used for data analysis. To investigate the main hypothesis of study, Pearson correlation test was used, and for sub- test hypothesis, independent t-test was used. The results indicated that there is a significant difference between job satisfaction and self-esteem in Aliabad academic teachers. State teachers' job satisfaction was higher than those who are non-State. Finally, State teachers’ self esteam is higher than, those who are non-State

Numerical investigation of roof heating impacts on thermal comfort and air quality in urban canyons

Impacts of thermal and buoyancy forces on the thermal comfort and air quality in urban canyons with different H/W ratios and rise/run ratio of rooftops are studied. 18 isothermal and non-isothermal models are studied by CFD modeling validated with experimental data from the literature. Based on the results, thermal buoyancy is observed to be effective in improving human comfort in the urban canyon. The temperature difference between roof surface and air increases the speed of air and contaminant transport in urban canyons. While the increase in height and tilt of structures around urban areas have shown to reduce thermal buoyancy. In broad canyons such as H/W = 0.5, an increase in height and slope of the roof causes the thermal comfort of leeward, windward, and central regions to move away from the neutral comfort conditions. In regular canyons, H/W = 1, the thermal comfort reduces for highly slanted roofs models. Domed roof leads to the lack of thermal comfort in upper levels of passages in leeward, windward, and central regions. In deep canyons, H/W = 2, high level of thermal comfort appears only for flat roofs. With an increase in roof height (rise/run), Predicted Mean Vote PMV index moves away from the comfort range. By increasing H/W ratio, roof height, wind comfort, and air quality inside regular and deep urban canyons, it was observed that the thermal buoyancy force leads to the reduction in thermal comfort