[Voyage en Italie : 1824-1830]. , [Détails de peintures décoratives] : [trois motifs d'architectures feintes avec petits personnages] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 435

[Voyage en Italie : 1824-1830]. , [Détails de peintures décoratives] : [trois motifs : oiseau, dauphin] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, 437

[Voyage en Italie : 1824-1830]. , [Détails de peintures décoratives] : [deux motifs : héron, griffon] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, 438

[Voyage en Italie : 1824-1830]. , Pompeia Mosaïques [détails de sols] : [trois motifs] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, 455

[Voyage en Italie : 1824-1830]. , [Détails de sols en mosaïques] : [quatre motifs] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 456

[Voyage en Italie : 1824-1830]. , [Détails de sols en mosaïques] : [trois motifs] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 457

[Voyage en Italie : 1824-1830]. , [Chapiteaux de la basilique] : [trois motifs] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, 422

[Voyage en Italie : 1824-1830]. , Pots à Eau modernes à Vico près Sorento ; Pots antiques à Pompeia : [huit motifs] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 462

[Voyage en Italie : 1824-1830]. , Enseignes de boutiques en terre cuite, d'après M. Mazois : [trois motifs] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 459

Effects of Heat Straightening Structural Steel, MLR-91-3, 1992

Heat straightening of steel beams on bridges struck by over height trucks has become common practice in recent years in Iowa. A study of the effects of this heat straightening on the steel beams thus straightened is needed. Appropriate samples for mechanical and metallurgical tests were cut from the same rolled beam from the end which was heated and the end which was not heated and the test results were compared. The test results showed beyond doubt that the steel was being heated beyond the permitted temperature and that the impact properties are being drastically reduced by the current method of heat straightening.

Retinal vessel oxygen saturation and its correlation with structural changes in retinitis pigmentosa.

PURPOSE: To study the influence of retinal structural changes on oxygen saturation in retinitis pigmentosa (RP) patients. METHODS: Oximetry measurements were performed on 21 eyes of 11 RP patients and compared to 24 eyes of 12 controls. Retinal oxygen saturation was measured in all major retinal arterioles (A-SO₂) and venules (V-SO₂) with an oximetry unit of the retinal vessel analyser (IMEDOS Systems UG, Jena, Germany). Oximetry data were compared with morphological changes measured by Cirrus optical coherence tomography (OCT) (Carl Zeiss Meditec, Dublin, CA, USA, macular thickness protocol). RESULTS: In RP patients, the retinal A-SO₂ and V-SO₂ levels were higher at 99.3% (p = 0.001, anova based on mixed-effects model) and 66.8% (p < 0.001), respectively, and the difference between the two (A-V SO₂) was lower at 32.5% (p < 0.001), when compared to the control group (92.4%; 54.0%; 38.4%, respectively). With the RP group, the A-V SO₂ correlated positively, not only with central macular thickness, but also with retinal thickness, in zones 2 and 3 (p = 0.006, p = 0.007, p = 0.014). CONCLUSION: These data indicate that oxygen metabolism was altered in RP patients. Based on our preliminary results, retinal vessel saturation correlated with structural alterations in RP. This method could be valuable in monitoring disease progression and evaluating a potential therapeutic response.

Field Measurement of Bridges for Long-term Structural Movement, HR-295, 1988

This report describes the field application of the tilt sensing method for monitoring movement of the Black Hawk and Karl King Bridges. The study objectives were: to design a data acquisition system for tilt sensing equipment utilizing a telephone telemetry system; to monitor possible movement of the main span pier, Pier No. 2, on the Black Hawk Bridge in Lansing and the possible long-term movement of Pier No. 4 on the Karl King Bridge in Fort Dodge; and to assess the feasibility, reliability, and accuracy of the instrumentation system used in this study.

[Voyage en Italie : 1824-1830]. , Frise de l'arc de Titus à Rome : [trois motifs : figures ailées des écoinçons et détail de la frise] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, 496

Lightweight Aggregate Use in Structural Concrete, MLR-69-1 and R-229, 1969

The Iowa State Highway Commission has adopted a number of rigid safety requirements that the Bureau of Public Roads has set forth as standards for road construction. One of these safety requirements is the elimination of two piers on Interstate grade separations, thus leaving two long spans. These longer spans lower the ability of prestressed concrete beams to compete economically with steel beams. In an effort to be more competitive, the prestressing companies have been studying the use of lightweight aggregate in structural concrete.