Log 23 includes: Mario Carpo on aggregatory design processes; Nicholas de Monchaux on NASA's last shuttle flight; Andrew Witt on the history of design hacking; Pier Vittorio Aureli on Cedric Price's Thinkbelt project; and Paul Virilio on the insecurity of history.

And: Greg Lynn on chemical architecture; Brennan Buck on plastic tectonics; Mike Silver on the structure of an airplane; and Simone Brott on the future in Corbusier's Firmany.

Plus: Antoine Picon reviews Schumacher's treatise; Andrea Phillips finds folly in Zumthor's Serpentine pavilion; Joseph Clarke considers Wagner's Gestamtkunstwerk; Luca Farinelli queries Emilio Ambasz, Peter Eisenman, Steven Holl, Bjarke Ingels, and Thom Mayne; and more.

Between February and August of this year, Luca Farinelli met with some 20 architects, critics, and historians and presented them with an identical sequence of questions, recording each meeting on video. Conversations with Emilio Ambasz, Peter Eisenman, Steven Holl, Bjarke Ingels, and Thom Mayne can be found in Log 23 (Fall 2011). We continue publishing those interviews here with Preston Scott Cohen, chair of the department of architecture and the Gerald M. McCue Professor of Architecture at Harvard University Graduate School of Design and founder and principal in the firm of Preston Scott Cohen Inc. of Cambridge, Massachusetts.

The architect who, more than anyone else, embraced the idea of architecture as a "free space" open to indeterminate development was Cedric Price. His projects focused on an idea of architecture that would change in time according to its use. A fundamental aspect of Price's work was his concern with the possibility of "enabling" human creativity through an environment devoid of the usual spatial constraints of traditional architecture. To that end, Price often dealt with declining industrial sites for which he envisioned social and spatial transformations toward more flexible uses. . . .

Design has entered a new era of mechanical invention. Faced with the limitations of CNC-CAM machines that gave architects the ability to build at the push of a button, design hackers now find ways to transform the machines themselves and repurpose technology for specifically aesthetic ends. Using acquired skills, simple trial and error, and even technological folklore, design hackers go a step further than conventional digital fabrication, altering the machines themselves as a part of the design project. . . .

Between February and August of this year, Luca Farinelli met with some 20 architects, critics, and historians and presented them with an identical sequence of questions, recording each meeting on video. Conversations with Emilio Ambasz, Peter Eisenman, Steven Holl, Bjarke Ingels, and Thom Mayne can be found in Log 23 (Fall 2011). We continue publishing those interviews here with Robert A.M. Stern, Dean and J.M. Hoppin Professor of Architecture at the Yale School of Architecture and founder and senior partner in the firm of Robert A.M. Stern Architects of New York City.

Between February and August of this year, Luca Farinelli met with some 20 architects, critics, and historians and presented them with an identical sequence of questions, recording each meeting on video. Conversations with Emilio Ambasz, Peter Eisenman, Steven Holl, Bjarke Ingels, and Thom Mayne can be found in Log 23 (Fall 2011). We continue publishing those interviews here, beginning with Stan Allen, the dean and George Dutton '27 Professor at Princeton University's School of Architecture and principal of Stan Allen Architect in New York.