2,902 research outputs found
Double or quits: should money found be risked?
This article examines social attitudes towards risk-preference and risk-aversion. First, we briefly discuss the theoretical approach to the analysis of risk-preference and risk-aversion that was developed within rational choice theory. Next, we present an approach to operationalise risk-preference using survey data. Our measurement
of attitudes towards risk follows the usual strategy: respondents are asked to choose
between a small amount of money they get for sure, and a large but risky amount. Drawing on the theoretical models and earlier empirical research, we formulate hypotheses about the social factors that have an impact on actual decision making in the situations under study. The hypotheses are tested using survey data. The article ends with a brief discussion. The novelty of our paper is that – to the best of our knowledge – neither previous Hungarian nor international research has attempted to examine attitudes towards risk using data from large-scale surveys
A vetésforgók növényösszetételének hatása a főbb növényi tápelemek talajban lejátszódó forgalmára és a talaj kémhatására = Effect of the crop composition of crop rotations on the dynamics of the main plant nutrients in the soil and on the pH of the soil
A vetĂ©sforgĂł Ă©s kukorica monokultĂşra tartamkĂsĂ©rletekben vĂ©gzett vizsgálataink alapján megállapĂthatĂł, hogy a növĂ©nyösszetĂ©tel hosszĂş távon számos talajtermĂ©kenysĂ©gi paramĂ©tert befolyásolhat. Vizsgáltuk a talaj humusz, nitrát-nitrogĂ©n, felvehetĹ‘ foszfor Ă©s kálium, továbbá mĂ©sztartalmának valamint kĂ©mhatásának mĂ©lysĂ©gi változását. EredmĂ©nyeink rámutatnak, hogy a növĂ©nytermesztĂ©s kĂĽlönbözĹ‘ rendszereivel ezek a paramĂ©terek milyen mĂ©rtĂ©kben mĂłdosĂthatĂłk Ă©s a tápanyagellátás hatásaival milyen összefĂĽggĂ©sek mutathatĂłk ki. A vetĂ©sforgĂłk növĂ©nyi összetĂ©tele elsĹ‘sorban a talaj humusz, nitrát Ă©s mĂ©sztartalmát, valamint pH-ját befolyásolta, a trágyázás pedig a humusz, a nitrát, a felvehetĹ‘ foszfor Ă©s kálium tartalomra gyakorolt hatást. | The goal of our research was to study the long-term effect of different crop rotations and continuous maize cropping on the vertical distribution of several soil parameters as humus, nitrate, uptakeable phosphorus and potassium and lime content, as well as the pH of soil. Our results shows that these parameters may be influenced by the systems of cropping on arable lands as well as its interactions with plant nutrition practices. The crop composition of crop rotations inluenced mainly the humus, nitrate, lime content and pH values of soil, while fertilization had an effect on the humus, nitrate, uptakeable phosphorus and potassium content of soil
Fogalmi váltás – szemléletváltás
A Fogalmi fejlĹ‘dĂ©s Ă©s fogalmi váltás cĂmű kötet szerzĹ‘je Korom ErzsĂ©bet, a „szegedi műhely” egyik mára már meghatározĂł egyĂ©nisĂ©ge. Csaknem kĂ©tszáz oldalas könyvĂ©ben arra vállalkozott, hogy bemutatja a tanulĂłk fogalmi rendszerĂ©nek vizsgálatával kapcsolatos nemzetközi Ă©s hazai eredmĂ©nyeket
Context-Dependent Plastic Response during Egg-Laying in a Widespread Newt Species
<p>Figure 3. (final version) Relationship between hatching success and egg size. Hatching success was calculated as the proportion of hatched eggs in each environment. As environment had no effect on hatching success, the regression line is fitted to the pooled data. </p
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