a The Author 2009. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the or...

This paper reports on the analysis of the signals sent by accelerometers fixed on the axles of a vehicle which passes over a bridge. The length of the bridge is divided into some parts and the transmissibility measurement is applied to the signals recorded by two following instrumented axles. As the transmissibility procedure is performed on the divided signals, the method is called Short Time ...

We used a mathematical transmission model to estimate when ecological drivers of respiratory syncytial virus (RSV) transmissibility would need to act in order to produce the observed seasonality of RSV in the Philippines. We estimated that a seasonal peak in transmissibility would need to occur approximately 51 days prior to the observed peak in RSV cases (range 49 to 67 days). We then compared...

In some applications, multiple measurements are available, but the driving input that gives rise to those outputs may be unknown. This raises the question as to whether it is possible to model the response of a subset of sensors based on the response of the remaining sensors without knowledge of the driving input. To address this issue, we develop time-domain sensor-to-sensor models that accoun...

Abstract A new adjustable high static–low dynamic stiffness vibration isolator is presented to improve the effective isolation frequency bandwidth. Firstly, finite element simulation of electromagnetic positive device and negative one carried out. Through static analysis, mathematical expressions force–displacement–current stiffness–displacement–current are derived. The requirements that system...

This paper addresses an on-off adaptive damping isolation, in which the can be frequency dependent. The comparison with passive isolation is illustrated by trade off performance curve, shown relation between displacement and force transmissibility. control based on dampings a switching frequency. analytical optimization of law obtained. optimized showed remarkable improvement comparing one. At ...

The mean vibration transmissibility values were measured for cotton work gloves commonly used in vibration-generating workplaces to evaluate the vibration isolating performance of cotton work gloves. The mean vibration transmissibility values of work cotton gloves were compared with those of four types of anti-vibration gloves measured in the same way. All the measurements were performed based ...

Drawing mainly on linear algebra and screw theory, this paper presents a general and systematic approach for force/motion/stiffness transmissibility analyses of redundantly actuated and overconstrained parallel manipulators. A set of normalized transmission indices is proposed for representing the closeness to singularities as well as for dimensional optimization of the redundantly actuated and...

In order to assess structural safety conditions, many vibration-based damage detection methods have been developed in recent years. Among these methods, transmissibility function analysis can utilize output data only, and proves to be effective in damage detection. However, previous research mostly focused on experimental validation of using transmissibility function for damage detection. Very ...