The Evolution of Deep Foundation Quality Management Techniques in the United States

The development and acceptance of quality control and assurance techniques for deep foundations in the United States is a relatively recent phenomenon, and one whose progress can be attributed to a handful of key individuals who first recognized the early promise of these methods, and worked diligently to validate them. The judicious use of nondestructive testing combined with various methods of full-scale load testing has been a major factor in the growth of the drilled shaft and augered, cast-in-place pile industry, by simultaneously allowing engineers to assess and adjust design assumptions, and allowing contractors to improve construction techniques and equipment. Such quality management programs have al-so justified significant increases in the allowable bearing capacities stipulated in building codes, particularly in Chicago and the Mid-west. This paper reviews the evolution and acceptance of quality control and quality assurance methods in the United States, and the effect they have had on deep foundation design and construction, and building code requirements nationwide

Spinal stabilization for patients with metastatic lesions of the spine using a titanium spacer

Anterior decompression in spinal metastases of the corporal type with impending (n=5) or present (n=36) neurological complications was performed in 41 patients. For reconstruction, a titanium cylinder was inserted after spondylectomy and augmented with an anterior plate. The titanium implant can easily be adjusted to the length needed without necessitating expensive additional equipment. Outside the patient the implant is filled with polymethylmetacrylate, facilitating plate transfixation for rotational locking. There was a 30-day mortality of 9.7%. Pain relief was apparent in 38 of 41 patients (92.7%), and motor improvement was manifest in 31 of 35 cases (88.6%). Six patients did not present with any neurological symptoms pre- or postoperatively. Neurological deterioration was registered in only 1 case (2.4%). Surgical efficacy was maintained until the death of the patients. Though tumor recurrence at a different spinal level led to consecutive surgery in 5 patients, no implant dislocation occurred during the observation period (maximum 44 months), characterizing the procedure as a mechanically reliable and safe technique

Critical Casimir forces in colloidal suspensions on chemically patterned surfaces

We investigate the behavior of colloidal particles immersed in a binary liquid mixture of water and 2,6-lutidine in the presence of a chemically patterned substrate. Close to the critical point of the mixture, the particles are subjected to critical Casimir interactions with force components normal and parallel to the surface. Because the strength and sign of these interactions can be tuned by variations in the surface properties and the mixtures temperature, critical Casimir forces allow the formation of highly ordered monolayers but also extend the use of colloids as model systems.Comment: 4 papges, 4 figures, accepted at Phys. Rev. Let

Operative Behnadlungsstrategien bei Femurmetastasen

Weder Deckblatt noch Ihaltsverzeischnis vorhanden

Mitschrift der Vorlesung zu Atomlehre [von Paul Peter Ewald durch H. Hertlein] im Wintersemester 1925/26

MITSCHRIFT DER VORLESUNG ZU ATOMLEHRE [VON PAUL PETER EWALD DURCH H. HERTLEIN] IM WINTERSEMESTER 1925/26 Mitschriften und Skripte von Vorlesungen an der Technischen Hochschule und Universität Stuttgart (-) Mitschrift der Vorlesung zu Atomlehre [von Paul Peter Ewald durch H. Hertlein] im Wintersemester 1925/26 (Bd. 24, 1925-1926) (3) Einband (-) Atomlehre von [Paul Peter] Ewald. Wintersemester 1925/1926 ([1]) Hauptteil I: Das allgemeine Bild vom Atombau (5) §1: Die Atomkonstanten für Materie und Elektrizität (5) §2 u. 3: Anzahl u. Verteilung der Elektronen im Atom (23) Hauptteil II: Die Bohr'sche Theorie der Atome und ihrer Spektren (31) §4: Theorie des H, He+ und B++ Atoms (31) §5: Serienspektren und Energiestufen (45) §6: Anregungs- und Ionisierungsspannungen; Normalzustände (59) Hauptteil III: Das periodische System (69) §7: Die Röntgenspektren (69) §8: Atomare Gesetzmäßigkeiten im periodischen System (77) Hauptteil IV: Moleküle und Molekülbildung (85) §9: Die Bandenspektren (85) §10: Molekülbildung durch angeregte Atome (95) §11: Polarität und Gestalt von Molekülen (101) Hauptteil V: Kristallchemie (107) §12 und 13: Gittertypen und Gitterstruktur (107) Hauptteil VI: Kernphysik (111) Farbinformation (-) Einband (-