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By 1963, a new structural system of framed tubes had appeared in skyscraper design and construction. Fazlur Rahman Khan, a structural engineer from Bangladesh (then called East Pakistan) who worked at Skidmore, Owings & Merrill, defined the framed tube structure as "a three dimensional space structure composed of three, four, or possibly more frames, braced frames, or shear walls, joined at or ...
Khan's central innovation in skyscraper design and construction was the idea of the "tube" structural system for tall buildings, including the framed tube, trussed tube, and bundled tube variants. His "tube concept", using all the exterior wall perimeter structure of a building to simulate a thin-walled tube, revolutionized tall building design ...
Jackson-Pratt Drain Trans man with two Jackson-Pratt drains after keyhole mastectomy. A Jackson-Pratt drain (also called a JP drain) is a closed-suction medical device that is commonly used as a post-operative drain for collecting bodily fluids from surgical sites.
Tube-frame construction was first used in the DeWitt-Chestnut Apartment Building, designed by Khan and completed in Chicago in 1963. [5] It was used soon after for the John Hancock Center and in the construction of the World Trade Center. A variation on the tube frame is the bundled tube, which uses several interconnected tube frames.
Evidence-based design (EBD) was popularized by the seminal study by Ulrich (1984) that showed the impact of a window view on patient recovery. [3] Studies have since examined the relationships between design of the physical environment of hospitals with outcomes in health, the results of which show how the physical environment can lower the incidence of nosocomial infections, medical errors ...
Chest tube have an end hole (proximal, toward the patient) and a series of side holes. The number of side holes is generally 6 on most chest tubes. The length of tube that has side holes is the effective drainage length (EDL). In chest tubes designed for pediatric heart surgery, the EDL is shorter, generally by only having 4 side holes. [17]
Utilizing over 17,000 vacuum tubes, the ENIAC was developed by the University of Pennsylvania's Moore School of Electrical Engineering during World War II. The ENIAC initiated the modern computing industry and the firm went on to design technology-related facilities for IBM and the Rand Corporation (later to become the Sperry Rand Corporation ...
The tower's innovative bundled tube structure was designed by Bruce Graham and Fazlur Khan. Photo credit: Soakologist (from Portal:Illinois/Selected picture ) Image 49 Shore of Lake Michigan at Illinois Beach State Park in Lake County .