A new method is developed for reducing train–induced floor vibrations in buildings. Vibration transmitted through building columns to the upper floors can be mitigated by considerably increasing the thickness of a lower floor, which is named the “blocking floor”. This can be a desirable and inexpensive solution for vibration mitigation. The work presented by this paper shows the ability of an i...

To construct a WiFi positioning system, dedicated individuals usually gather radio scans with ground truth data. This laborious operation limits the widespread use of WiFi-based locating system. Off-the-shelf smartphones have the capability to scan radio signals from WiFi Access Points (APs). In this paper we propose a scheme to construct a map of WiFi AP positions autonomously without ground t...

Absfrcrcf Voice Confenneing is an essential block of any multimedia system used for collaborative work. In a collaborative environment Floor ComoI is an important issue tbat is dealt by many; yet r i n g the number offloors is an open problem. In an audio conference, mixing streams from too many concurrent speakers degrades the voice quality. Therefore setting an upper bound for the number of s...

This paper explains the cause of nonlinearity in floor attenuation hither to left unexplained. The performance degradation occurring in air interface for GSM signals is quantitatively analysed using the concept of Radiating Columns of buildings. The signal levels were measured using Wireless Network Optimising Drive Test Tool (E6474A of Agilent Technologies). The measurements were taken in refl...

House dust mites produce inhalant allergens of importance to allergic patients. We measured the major group 1 allergens, Der p 1 and Der f 1, from the house dust mites Dermatophagoides pteronyssinus and Dermatophagoides farina, respectively in 100 randomly selected domestic homes from Cheonan, Korea. Dust samples were collected by vacuuming from the living room floor and 1 mattress in each home...

Buildings are made up of beams and plates which are much stiffer in tension-compression than in bending. Thus, the vertical modes of a building (governed by the tension-compression of the walls at the macroscopic scale) can appear in the same frequency range as the bending modes of the floors. In the absence of bending resonance, the vertical vibrations are described at the macroscopic scale by...

Appropriate ventilation in a classroom is helpful for enhancing air exchange rate and student concentration. This study focuses on the effects of fenestration in a four-story school building by performing numerical simulation of a building when considering indoor and outdoor environments simultaneously. The wind profile function embedded in PHOENICS code was set as the inlet boundary condition ...

In this paper we construct low-density parity-check (LDPC) codes from transversal designs with low error-floors over the additive white Gaussian noise (AWGN) channel. The constructed codes are based on transversal designs that arise from sets of mutually orthogonal Latin squares (MOLS) with cyclic structure. For lowering the error-floors, our approach is twofold: First, we give an exhaustive cl...

In this paper, a structural health monitoring (SHM) system based on multi-scale cross-sample entropy (MSCE) is proposed for detecting damage locations in multi-bay three-dimensional structures. The location of damage is evaluated for each bay through MSCE analysis by examining the degree of dissimilarity between the response signals of vertically-adjacent floors. Subsequently, the results are q...

The Great Baths were a large and sumptuous public building of late Roman Aquileia, with refined mosaics and inlay-work floors. Today they are completely concealed below cultivated fields, because vaults, walls and their architectural decorations were despoiled already in the Middle Age. Therefore, the university of Udine Archaeological Mission needs to employ both traditional and new technologi...