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Mögelpåväxt på mineraliska fasader

Mikrobiell påväxt på fasader har alltid förekommit. På senare tid har dock problemet ökat kraftigt. Flera fall med krafigt påväxt på putsade fasader inom några år efter putsningen har rapporterats. Vid ett seminarium i Göteborg 2001, arrangerat av Mur och Puts Information (MPI), framkom starka önskemål att problemet skulle analyseras i detalj. Innan något större projekt påbörjades beslöts att geno

Några fakta om vattenavvisande fasadimpregnering

Sedan 1990 har forskningsprojekt rörande vattenavvisande fasadimpregnering ingått i forskningsprogrammet för Fuktgruppen vid Lunds Tekniska Högskola. Projekten har finansierats av Svenska Byggbranschens Utvecklingsfond, SBUF.

Migratory blackcaps can use their magnetic compass at 5 degrees inclination, but are completely random at 0 degrees inclination

It is known that night-migratory songbirds use a magnetic compass measuring the magnetic inclination angle, i.e. the angle between the Earth's surface and the magnetic field lines, but how do such birds orient at the magnetic equator? A previous study reported that birds are completely randomly oriented in a horizontal north-south magnetic field with 0° inclination angle. This seems counter-intuit

Nytt cement med gynnsam miljöprofil

Dagens cement för konstruktionsändamål baseras på portlandklinker. Utgångsmaterialet är kalksten som bränns vid hög temperatur i cementugn. Processen är energikrävande samtidigt som stora mängder koldioxid drivs ut ur kalkstenen och ur bränslet. Koldioxidutsläppet från världens totala cementproduktion anses uppgå till cirka fem procent av alla koldioxidutsläpp globalt.

Coalitions, Coordination and Electoral Choice : A Lab Experimental Study of Strategic Voting

When a voter chooses between large and small parties in a coalition, strategic reasons may be the tie-breaker. “Strategic voting” is often defined as a vote for another party than one’s most preferred one with the intention to affect the outcome of the election. The presence of coalitions can sometimes be argued to lead to less strategic voting, whereas others claim that coalitions create more str

Flight of the dragonflies and damselflies

This work is a synthesis of our current understanding of the mechanics, aerodynamics and visuallymediated control of dragonfly and damselfly flight, with the addition of new experimental and computational data in several key areas. These are: the diversity of dragonfly wing morphologies, the aerodynamics of gliding flight, force generation in flapping flight, aerodynamic efficiency, comparative fl

Optimization of the short-circuit current in an InP nanowire array solar cell through opto-electronic modeling

InP nanowire arrays with axial p-i-n junctions are promising devices for next-generation photovoltaics, with a demonstrated efficiency of 13.8%. However, the short-circuit current in such arrays does not match their absorption performance. Here, through combined optical and electrical modeling, we study how the absorption of photons and separation of the resulting photogenerated electron-hole pair

Sufficient Reasons to Act Wrongly : Making Parfit’s Kantian Contractualist Formula Consistent with Reasons

In On What Matters (2011) Derek Parfit advocates the Kantian Contractualist Formula as one of three supreme moral principles. In important cases, this formula entails that it is wrong for an agent to act in a way that would be partially best. In contrast, Parfit’s wide value-based objective view of reasons entails that the agent often have sufficient reasons to perform such acts. It seems then tha