Opaque enclosures of buildings play an essential role in the level of comfort experienced indoors and annual energy demand. The impact of solar radiation and thermal inertia of the materials that make up the multi-layer enclosures substantially modify thermal transmittance behaviour of the enclosures. This dynamic form of heat transfer, additionally affected by indoor HVAC systems, has a substa...

This study introduced a method for enhancing the shielding effectiveness of an enclosure with apertures using absorber. The absorber was installed on inner surface aperture and attenuated incident electromagnetic waves as they passed through it. Furthermore, reduced standing generated inside owing to cavity effect, improving effectiveness. A 3D numerical analysis confirmed that proposed structu...

Encoding the global geometric shape of an enclosed environment is a principal means of orientation in human and non-human animals. Animals spontaneously encode the geometry of an enclosure even when featural information is available. Although features can be used, they typically do not overshadow geometry. However, all previously tested organisms have been reared in human-made environments with...

The interaction of turbulent plumes is examined in the context of building ventilation flows. Recent models for natural ventilation have been based on simplified treatment of the heat sources in a ventilated enclosure. These models treat buoyancy sources as plumes and assume that they do not interact. To improve the applicability of these models to buildings we examine the effects of plume-plum...

Scattering of waves in the medium between transmitters and receivers in a multiple-in-multiple-out (MIMO) system can in principle lead to a large enhancement of the channel capacity. To obtain the best results, the scattering of the waves in the medium needs to be strong enough to decouple the available connections. The physics of the wave propagation in a scattering medium is in general comple...

A method for enclosing matrix polynomials is proposed. This method is applicable when the matrix is diagonalizable and supplies an interval matrix including the matrix polynomial. The computational cost of this method does not depend on the degree of the polynomial. Hence the proposed method is faster than previous approaches when the degree is large. Numerical results show the properties of th...

Bangladesh has extensive floodplain wetlands covering over 4 million ha. These remain an important source of livelihood fish contribute about 60% of national animal protein consumption, and wetland plants are used for fodder, food and construction. Over fishing, short term leasing of use rights, flood control and drainage, and pollution all have negative impacts. In contrast several projects ha...

Natural convective laminar flow is numerically investigated in a two-dimensional and square enclosure at various angles of inclination respect to horizontal. Two adjacent walls of the enclosure are insulated and the other two are kept at different temperatures. The influence of Rayleigh number representing the effects due to the differential heating of the enclosure walls as well as the effect ...