To what extent is the development of a fluid-transport system related to flow within the system? Colonies of the bryozoan Membranipora membranacea have a simple external fluid-transport system with three components: the canopy of lophophores (crowns of ciliated tentacles), the edge of the canopy, and chimneys (raised openings in the canopy). The lophophores pump seawater into the colony and cap...

PURPOSE Arch aneurysm combined with insufficient Zone 1 length remains challenging. While a chimney stentgraft with supra-aortic bypass is a recognized solution for arch aneurysm, no definite strategy has been established yet. The aim of this study was to investigate efficacy of chimney stentgraft for patients with zone 1 of insufficient length. METHODS Between 2011 and 2013, 10 consecutive p...

According to official fire statistics, chimney fires account for almost 20% of all that occur in family residential buildings every year the Balkan region. The high temperature from chimneys may have an influence on spreading wooden girders. objective study was gather and analyse data timber structure incidents occurring lowland rural settlements Serbia (2010-2014) a mountain settlement Montene...

A strategy is described for the construction of a reference model design solar chimneys that includes variations in geometry and materials chimney's components. The will be developed from dynamic simulations transient state chimney under irradiation real conditions. based on artificial neural networks (ANNs) generalization properties allowing predictions multiple geometries chimney. can serve a...

The classical solar chimney offers passive electricity and water production at a low operating cost. However, the suffers from high capital cost energy output density per construction area. investment increases levelized of (LCOE), making design less economically competitive versus other technologies. This work presents new noteworthy for maximizing production. was achieved by integrating cooli...

Solar chimney power plants are plants based on solar thermal power including three parts of collector, chimney and turbine, which is able to produce electrical energy. One of the effective parameters in increasing the power production is the collector angles versus horizon. In the present study, a numerical analysis of a solar chimney power plant for different angles of the collector (divergent...

Sieve trays are widely used fractionating devices in separation and purification industries involving tray towers. According to the importance of trays, it is vital to predict lower operating range limits for such gas-liquid contacting devices. Weeping phenomenon observed in bubbling regime and occurs at low vapor flow rates. The experimental set up includes a 1.22 m diameter column with two te...

An aortic arch banding procedure was performed on an 82-year-old man for treatment of proximal type I endoleaks 2 days after he had undergone emergency thoracic endovascular aortic repair with the chimney technique for a ruptured aortic arch aneurysm. Contrast-enhanced computed tomography after the second procedure demonstrated significant shrinkage of the aneurysmal sac as well as a complete d...