A 2D unsteady computational fluid dynamics (CFD) model is employed to simulate buoyancy-driven turbulent ventilation in attics with different pitch values and ceiling insulation levels under summer conditions. The impacts of roof pitch and ceiling insulation on the cooling load of gable-roof residential buildings are investigated based on the simulation of turbulent air flow and natural convect...

In this article, a new method of increasing the efficiency combined steel roof trusses is proposed and considered. A rational shape truss, including its topology geometric parameters, was obtained, but without obtaining SSS. provides adjustment SSS in truss by changing upper belt panel length. On basis obtained structural form proposed. It shown that thanks to method, it possible obtain more ef...

The designer of convertible vehicles needs to consider the acoustical properties, quality of the interior environment, fatigue life and the aesthetic integrity of the flexible roof. Each of these concerns is affected, to a greater or lesser extent, by the interaction of the flexible roof material and its supporting structure with the aerodynamic loading on the material. For many convertibles, t...

Buildings with atrium can be found everywhere in big cities among which Hong Kong is one of the examples. The evolution of this building type should be traced back to explore the reason why it has been a popular design throughout these years. It was found originated about two hundred years ago, with changes in terms of configurations and functions occurred. After centuries of development, benef...

The U.S. National Institute for Occupational Safety and Health (NIOSH) conducted a study to determine the effectiveness of a filtered air delivery system to reduce respirable dust exposure of roof bolter operators in underground coal mines. When performing roof bolting operations, roof bolter operators may experience exposure to high levels of respirable dust during a working shift, especially ...

BACKGROUND Atrial fibrillation (AF) is a common problem after CABG. Prevention with prophylactic drug therapy has had limited success, therefore alternative approaches are required. This study investigated the role of biatrial pacing compared with no pacing on AF incidence after isolated first-time CABG. METHODS AND RESULTS During surgery, temporary pacing leads were placed in the lateral wal...

The paper addresses the design of large roof structures for semi outdoor spaces through an investigation of a type of performance-oriented design, which aims at integrating performance evaluations in the early stages of the design process. Particularly, aiming at improving daylight and thermal comfort under large structures, the paper focuses on the exploration of passive solar strategies to re...