Search results for " Competition"

Immunocompetence and resource holding potential in the damselfly, Calopteryx virgo L

2004

It is generally believed that resource holding potential reliably reflects male quality, but empirical evidence showing this is scarce. Here we show that the outcome of male-male competition may predict male immunocompetence in the territorial damselfly, Calopteryx virgo (Odonata: Calopterygidae). We staged contests between 27 pairs of males and found that winners of the contests showed higher immunocompetence, measured as encapsulation response, compared with that of losers. Furthermore, the winners had larger fat reserves. We also collected 29 males that had not been used in staged contests, and found that in these males encapsulation response correlated positively with an individual’s fa…

Contrasting reproductive traits of competing parasitoids facilitate coexistence on a shared host pest in a biological control perspective

2022

BACKGROUND: Interspecific competition in insect parasitoids is an important ecological phenomenon that has relevant implications for biological pest control. To date, interspecific intrinsic (=larval) competition has been intensively studied, while investigations on extrinsic (=adult) competition have often lagged behind. In this study we examined the role played by parasitoid reproductive traits and host clutch size on the outcome of extrinsic competition between Trissolcus basalis (Wollaston) and Ooencyrtus telenomicida (Vassiliev), two egg parasitoids of the pest Nezara viridula (L). Laboratory experiments were conducted by allowing both parasitoid species to exploit an egg mass made of …

Science in space vs space science: The European utilisation of spacelab∗

1999

Abstract Spacelab is the conventional name given to a manned laboratory to be carried onboard NASA's Space Shuttle, which was built in Europe under the aegis of the European Space Agency (ESA). This paper deals with the initiatives undertaken in Europe to establish a utilisation programme for Spacelab, in particular for its first flight, planned as a joint ESA/NASA demonstration mission. Two main factors will be discussed, which prevented ESA from establishing a sizeable Spacelab utilisation effort. Firstly, owing to the cost escalation of the Spacelab development programme and to NASA's charging policy for access to the Shuttle system, which did not foressee any preferential treatment to E…

Gendering multi-voiced histories of the North American space industry: the GMRD White women

2019

Purpose The authors focus on “writing women into ‘history’” in this study, embracing the notion of cisgender and ethnicity in relation to the “historic turn”. As such, the authors bring forward the stories of the US Pan American Airway’s Guided Missile Range Division (GMRD) and the White women who worked there. The authors ask what has a Cold War US missile division to tell us about present and future gendered relationships in the North American space industry. Design/methodology/approach The authors apply Foucault’s technology of lamination, a form of critical discourse analysis, to both narrative texts and photographic images in the GMRD’s in-house newsletter, the Clipper, dating from 19…

Historia y lenguaje: la vuelta al relato dos décadas después

2019

This essay aims to give a critical account of the main arguments involved in the debate about the so called «linguistic turn» in History. Bringing into discussion the most recent historiographical production, we argue that there is space for, and an unrgent need of, thinking seriously about the relationship between 'language' an 'history' without, necessarily, collapsing our discipline into a mere narrative or a postmodern technique of «reading the signs». We want to challenge, therefore, rhe rigid dichotomy between a perception of language as a reflection of social reality and a perception of language as the ultimate creator of it.

A Modern-Day Diary : Notes for Future Humans

2021

Abstract Time and being can be seen as a space. A modern-day diary is a way of exploring that space or state of being. Outlining and shaping it requires word, image and imagination. The question is framed cultural-philosophically, and the mode of writing is poetic essayism. Otherwise, the creative untangling and differentiation of the poetics of lived space is not possible. After all, the goal is to combine science and art and weave them into the same reflective fabric. The essential aspects include thoughts about the fullness and filling of something, about its fulfilment. Then the present moment is not seen as marking a boundary in just one direction: it is not just an endpoint of the pas…

The European Courts and the Security Council: Between Dédoublement Fonctionnel and Balancing of Values: a Rejoinder to Grainne de Burca, André Nollka…

2009

* Professor of International Law, University of Naples ‘ Federico II ’ . Email: padesena@tin.it ; Associate Professor of International Law, University of Palermo. Email: chiara.vitucci@unipa.it 1 Nollkaemper, ‘ The European Courts and the Security Council: Between Dedoublement Fonctionnel and Balancing of Values: A Reply to De Sena and Vitucci ’ , 20 EJIL (2009) 862. Andre Nollkaemper, Grainne de Burca and Iris Canor have made a number of critical observations which are – in part at least – interesting and useful. A full examination of them would probably demand more time and more space than we have been given here. Nevertheless, we will try to reply to some of their remarks and to clear up…

Human-Technology Choreographies : Body, Movement, and Space

2016

Human-Technology Choreographies : Body, Movement, and Space in Expressive Interactions

2017

Wastewater nutrient removal in a mixed microalgae-bacteria culture: effect of light and temperature on the microalgae-bacteria competition.

2018

[EN] The aim of this study was to evaluate the effect of light intensity and temperature on nutrient removal and biomass productivity in a microalgae¿bacteria culture and their effects on the microalgae¿bacteria competition. Three experiments were carried out at constant temperature and various light intensities: 40, 85 and 125¿µE¿m¿2¿s¿1. Other two experiments were carried out at variable temperatures: 23¿±¿2°C and 28¿±¿2°C at light intensity of 85 and 125¿µE¿m¿2¿s¿1, respectively. The photobioreactor was fed by the effluent from an anaerobic membrane bioreactor. High nitrogen and phosphorus removal efficiencies (about 99%) were achieved under the following operating conditions: 85¿125¿µE¿…