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CNG and LNG: one type of fuel in a different physical state
CNG is compressed natural gas and LNG is liquefied. The difference determines the method of storage and the equipment used.
Published22 Oct 2026
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Cars
Renewable diesel and biodiesel: various chemical products
The two fuels can start from similar raw materials, but they are not the same. The method of processing matters.
Published22 Oct 2026
Cars
B5, B20 and B100: what does the proportion of biodiesel mean
The B designation describes the biodiesel share of the mixture. Compatibility and conditions of use are checked separately.
Published22 Oct 2026
Cars
E10 and E85: designation is not a permit for every car
Ethanol can be involved in gasoline mixtures of different composition. The E85 should not be taken as an ordinary substitute for gasoline in any model.
Published22 Oct 2026
Cars
Octane number: detonation resistance, not universal power
The octane number describes the anti-detonation property of gasoline. The choice begins with the requirements of the particular engine.
Published22 Oct 2026
Architecture
Porto: how the slopes towards the Douro shape the city
The historic Porto develops on hills above the mouth of the Dorou. The river and the various architectural layers must be considered together.
Published22 Oct 2026
Architecture
Urbino: The Renaissance on the Scale of a Small Hilly Town
Urbino shows a preserved Renaissance urban image associated with the cultural heyday of the 15th century. Its meaning is not only in a separate palace.
Published22 Oct 2026
Architecture
Ravenna: mosaics belong to different types of buildings
The Early Christian monuments of Ravenna are an ensemble of eight buildings. The mosaic must connect to the specific space.
Published22 Oct 2026
Architecture
Alberobello: what does dry masonry mean in trulli
Trulli are limestone dwellings with characteristic roofs. Dry masonry means building without mortar, not just a white facade.
Published22 Oct 2026
Architecture
Matera: the rock dwelling is part of the terrain
Sassi in Matera shows a relationship between habitation, rock and ecosystem. The separate opening in the rock does not describe the entire settlement.
Published22 Oct 2026
Architecture
Safranbolu: urban architecture along a trade route
Safranbolu is associated with the long service of a caravan road. Public buildings and the residential environment should be read in this context.
Published22 Oct 2026
Architecture
Bursa and Cumalıkızık: the city’s connections beyond its walls
The early Ottoman Bursa is viewed with public complexes, shopping districts and a link to agriculture in the surrounding area.
Published22 Oct 2026