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Assessment of diesel-contaminated domestic wastewater treated by constructed wetlands for irrigation of chillies grown in a greenhouse

In order to avoid environmental pollution and eliminate the need for using fertiliser, this study assessed for the first time the optimum performance of mature (in operation since 2011) vertical flow constructed wetlands in treating domestic wastewater (with and without hydrocarbon) and the subsequent recycling of the outflow to irrigate chillies (De Cayenne; Capsicum annuum (Linnaeus) Longum Grou

Scoping the field of disaster exercise evaluation - A literature overview and analysis

The evaluation of emergency, disaster and crisis management exercises supports both individual and organisational learning, facilitates the development of response capabilities, and helps to determine whether the current level of preparedness is good enough. Nevertheless, despite its importance in the field of disaster risk management, there is a lack of a comprehensive overview of research in the

Betonguttorkning med byggcement

I denna artikel redogörs för uttorkning hos betong med Byggcement jämfört med andra cementsorter: Slite Std-cement samt anläggningscement. Inverkan av silikastoft på uttorkningen hos Slite Std-cement redovisas. För ändamålet studerades 14 betonger upp till ett halvt år. Inverkan av självuttorkning, lufthärdning och vattenlagring fanns med i programmet. Resultaten visar att uttorkningen i huvudsak

Ecology of tern flight in relation to wind, topography and aerodynamic theory

Flight is an economical mode of locomotion, because it is both fast and relatively cheap per unit of distance, enabling birds to migrate long distances and obtain food over large areas. The power required to fly follows a U-shaped function in relation to airspeed, from which context dependent ‘optimal’ flight speeds can be derived. Crosswinds will displace birds away from their intended track unle

Brosystem mellan Honchu och Shikoku: Japanska rekordbroar

I denna artikel redovisas en sammanställning av ett stort antal broprojekt mellan den japanska huvudön Honchu och den söder därom belägna ön Shikoku. Först ges en bakgrund vad gäller andra stora hängbroar och snedkabelbroar i världen. Därefter belyses och specifieras de aktuella japanska broarna i detalj. Sammantaget är brosystemen mellan Honchu och Shikoku imponerande inte bara vad gäller spännvi

Negotiating an ecological barrier : Crossing the Sahara in relation to winds by common swifts

The Sahara Desert is one of the largest land-based barriers on the Earth, crossed twice each year by billions of birds on migration. Here we investigate how common swifts migrating between breeding sites in Sweden and wintering areas in sub-Saharan Africa perform the desert crossing with respect to route choice, winds, timing and speed of migration by analysing 72 geolocator tracks recording migra