The transmission line method (TLM) is a very efficient method for dynamic modelling of flow in pipelines, and uses delay elements to represent wave propagation. In this paper an existing TLM model is investigated and shown to have some deficiencies. Some adjustments are proposed to avoid these deficiencies and enhance the transient and steady state accuracy. Very good agreement is obtained betw...

A three-dimensional transmission-line matrix (TLM) model was developed to simulate microwave-scanning microscopy. A TLM algorithm that allows the simulation of the scanning was developed. Numerical modeling was carried out for frequencies that are commonly used in microwave nondestructive testing (1GHz – 20GHz). Structures with local discontinuities in the electric permittivity are modeled nume...

The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Abstract This paper explores the coupling of the Perfectly Matched Layer technique (PML) with the Thin Layer Method (TLM), the combination of which allows making highly efficient and accurate simulations of layered half-spaces of infinite depth subjected to arbitrary dynamic so...

BACKGROUND Treatment for local glottic cancer recurrences after primary transoral laser microsurgery (TLM) has not been standardized. METHODS In 33 consecutive cases of salvage TLM after laser surgery for early glottic carcinoma failed, we retrospectively considered the potential clinicopathological prognostic factors in univariate statistical setting. RESULTS Patient age <65 years and path...

| This paper describes a novel time-domain node for the TLM method. It has the unique feature of modelling arbitrary inhomogeneous media on a generally graded rectangular TLM mesh without using stubs. Variations in material properties and arbitrary aspect ratios of mesh cells are modelled by allowing diierent characteristic impedances in a cell, maintaining impulse synchronism throughout the me...

In an attempt to determine the RF shielding artifacts produced by conducting stents during MRI scanning of patients, a Transmission Line Matrix (TLM) model was developed based on the symmetrical condensed node. This approach allows considerable flexibility including freedom from stability issues and the ability to reconstruct digital signals in the time or frequency domain. To validate the resu...

Current practice standards for the treatment of early to moderately advanced laryngeal and hypopharyngeal cancer demand both achievement of cure and preservation of laryngeal structure and function to the greatest extent possible. The oncologic and functional results of transoral laser microsurgery (TLM) for early glottic cancer appear to be comparable to those of radiotherapy, with a higher ra...

BACKGROUND The purpose of this systematic review and meta-analysis was to assess the oncological and functional outcomes of transoral laser microsurgery (TLM) in radiorecurrent laryngeal cancer. METHODS The review was performed using search strategies including Medline, Embase, Zetoc, conference proceedings, and a manual search. Pooled estimates of local control at 24 months, disease-free sur...