Article history: Received: 11.03.2013. Received in revised form: 02.04.2013. Accepted: 02.04.2013. This paper puts forward an innovative criterion in the cellar automata (CA) technique for both matching zone similarity and mapping failure pattern of masonry wall panel. The criterion proposed in this paper is a two-step matching method. Firstly, calculate the state values of the cells in the bas...

Ferrocement as a form of reinforced concrete constructed of hydraulic cement mortar strengthened with closely spaced layers of continuous and relatively small diameter wire mesh. It has been used worldwide as a construction material to provide better construction and rehabilitation of structures. Moreover, there may be structural deterioration of ferrocement due to the exposure of saline water....

This paper presents results from an investigation of the behavior of unstiffened thin steel plate shear wall SPSW having a regular pattern of openings a.k.a. perforated SPSW . Finite element monotonic pushover analyses were conducted, first on a series of individual perforated strips with variation in perforation diameter, to develop a fundamental understanding of the behavior of complete perfo...

A theoretical method has been developed for predicting the directivity of the sound that is radiated from one side of a panel, or an opening, which is excited by sound incident from the other side of the panel, or the opening, from a room or duct. This directivity needs to be known when one is predicting the sound level at an external position which is due to the radiation of sound from the roo...

A34-year-old man presented with crushing substernal chest pain associated with ingestion of crack cocaine. An ECG showed findings consistent with an acute anterior wall myocardial infarction complicated by intermittent complete heart block. A coronary angiogram demonstrated diffuse thrombosis of the left anterior descending (LAD) coronary artery (arrow) (Figure, panel A). A temporary pacemaker ...

Figure 1 – Transthoracic echocardiography: giant eco-dense mass occupying the entire right atrium (Panel A) and severely limiting tricuspid valve inflow (Panel B). Atrial wall and visceral pericardium (arrows) A 75-year-old man underwent elective biological aortic valve replacement. Two weeks after surgery, transthoracic echocardiography (TTE) showed a small pericardial effusion. On the followi...

A multi-panel PMC infilled system, using polymer matrix composite (PMC) material, was introduced as new conceptual design for seismic retrofitting. A proposed multi panel PMC infilled system was composed of two basic structural components: inner PMC sandwich infills and outer FRP damping panels. The PMC material had high stiffness-to-weight and strength-to-weight ratios. Therefore, the addition...

Microperforated panel (MPP) absorbers are promising as a basis for the next-generation of sound absorbing materials. A microperforated panel absorber is backed by an air-cavity with a rigid-back wall and its typical use is for a sound-absorbing ceiling. However, MPPs have some limitations and disadvantages: its sound absorbing mechanism is limited to a Helmholtz resonator caused by perforations...

Direct numerical simulations are employed to investigate the effects of discrete suction orifices at the wall on the disturbance evolution in laminar three-dimensional boundary-layer flows with favourable pressure gradient. Suction panels with many suction orifices can excite unstable crossflow (CF) modes even if the orifice spacing is smaller than the chordwise/spanwise wavelengths of unstable...

A percutaneously placed central catheter (PICC) (Vygon premicath 28G, 1Fr, Germany) was inserted into the central venous system of a preterm infant born after 26 weeks of gestation for routine parenteral nutrition. A plain anteroposterior chest X-ray for verifying correct catheter placement erroneously showed the catheter tip to be located safely outside the heart silhouette [Panel A]. Injectio...