Atrium is a popular architectural feature utilized widely by building designers and owners to bring various benefits such as adequate daylight, circulation spaces and surfaces for landscape applications. But atrium problems in tropical climates such as excessive daylight, glare and high temperature, which lead to increase building energy demand, have been reported. Atrium has been used with var...

Radiance matrix-based methods enable efficient parametric simulations, allowing users to vary sky conditions, fenestration systems, and other model parameters at a minimal cost computation. However, the steep learning curve complex workflow hinder widespread adoption of methods. The frads Python library with series command-line tools was developed automate entire simulation process, lowering en...

A physics based 3D simulation of sea surfaces is presented. The simulation is suitable for the pre-calculation of detector images for an IR camera. Synthetic views of a maritime scenario are calculated in the MWIR and LWIR spectral bands and the images are compared with data collected in a field trial. In our computer simulation the basic sea surface geometry is modeled by a composition of smoo...

Repeated modifications of multiple design parameters are required to optimize daylighting system design. However, a large number of optional design parameters increase the computation time. This research developed a simulation-based model to evaluate daylighting system design based on system daylighting and thermal performance. The model utilized the prediction methods to speed up computation. ...

The article discusses issues related to the construction of the PRT network simulator and the simulation process: the elements of PRT network structure, their representation in the simulator, the simulation process itself, animation, and automation of the experiments. An example of a simulation environment Feniks is described, elaborated within the framework of the Eco-Mobility project.

The paper begins with a review of the rational for development of personal rapid transit, the reasons it has taken so long to develop, and the process needed to develop it. Next I show how the PRT concept can be derived from a system-significant equation for life-cycle cost per passengermile as the system that minimizes this quantity. In the bulk of the paper I discuss the state-of-theart of a ...

This paper presents our research and development of system interfaces between Building Information Modeling (BIM) and Building Energy Modeling (BEM), for supporting integrated architectural design and energy simulation. Our methods utilize the BIM authoring tools’ Application Programming Interface (API) to translate BIM into Object-Oriented Physical Models (in Modelica) for building thermal sim...

Abstract A laser deposition process involves the supply of metallic powders into a laser-heated spot where the powder is melted and forms a melt puddle which quickly solidifies into a bead. In order to design an effective system, the laser beam, the powder beam, and their interactions need to be fully understood. In this paper, the laser-material interaction within the melt pool is reported usi...

Current IR ship signature codes have some limitations in predicting ship IR signatures. They either model general BRDF while ignoring multi-reflections, or compute multi-reflections with simplified BRDF models. We propose a new Monte Carlo ray tracing method incorporating measured BRDF data, which can calculate multi-reflections with general BRDF data. Much works have been done in computer grap...