Junkspace

In mega buildings such as shopping complex, there are massive spaces within the building. The interior spaces that are controlled in terms of condition are called "junkspace". Personally, I think junkspace can be both good and bad for the building. What is good about this junkspace is that when the space has been sealed off from the context and surrounded with interior elements instead, so the undesirable condition such as bad surroundings and weather can be got rid of. But on the other hand, in terms of architecture elements there is a context that works together with the building itself and by having the space sealed off from its exterior environment, the building would be isolated; no night/day or sunny/rainy/ snowy. In conclusion I think junkspace works functionally and works for solving problem of condition, but it does not go along well with how architecture should be

Postmodernism-Expressionism

From modernism, we may have heard much on functionalism of "form follows function" the designs have turned out so intelligent on the interior and details, but so simple that normal people may not notice as a great piece of design or find something interesting especially from outside. For postmodernism, the principle turned up side down. Venturi made the literally difference through "Learning from Las Vegas" where he talked about "duck building" which is completely opposite from "form follows function". 

Then postmodernism has worked together with expressions. The feature of the building has moved to exterior and the simplicity has moved inside the building. We can see this kind of design on Frank Gehry's buildings. For example, The Guggenheim in Bilbao can be seen and remembered because of its expressive exterior in both form and material. For me, I think nowadays this kind of architecture is more successful in terms of accessing people. This kind of postmodern architecture can attract people from different careers because of its outstanding look. They may not understand the concept or care what is in the building. While some modern buildings are attractive only to those who study and understand the concept inside.

Postmodern & Rem Koolhaas

In modern period we have seen Le Corbusier & Mies van der Rohe who were functionalists that created simplifications of previous styles. Modernism has left sense of "purity" & "either...or..." while postmodernism came along with sense of "mixture" which we can have "both...and..." in architecture. Postmodernism allows expression in many ways which includes sculptural forms & ornaments.

Personally, I think modernism focused too much on the function & structural details. Ornaments & human needs were not emphasized that much. For example, Mies came up with "less is more" where he designed simple in terms of look and got more complex in details. Then, for postmodernism, I think Frank Gehry has expressed the sense of mixture quite clearly.

For Rem Koolhaas, I think he has produced works that go along with the concept of postmodernism. Villa Bordeaux is one of a good example to look at, Rem provided functions according to clients' need as well as  interesting details inside the house.