A Refined Model for Human Induced Loads on Stairs

2012 ◽  
pp. 27-39 ◽  
Author(s):  
Michael Kasperski ◽  
Benjamin Czwikla
Keyword(s):  
Refined Model

REFINED MODEL FOR CALCULATION OF LIMITING SECRET EFFICIENCY OF WI-FI COMMUNICATION CHANNEL

2012 ◽  
Vol 71 (16) ◽  
pp. 1465-1473
Author(s):  
Vladimir M. Shokalo ◽  
A. A. Strelnitskiy ◽  
M.K. Abdul-Hussein ◽  
E.V. Yagudina
Keyword(s):  
Communication Channel ◽  
Refined Model

scholarly journals Waste Identification in the Operation of Structural Engineering Companies (SEC) According to Lean Management

2021 ◽  
Vol 13 (8) ◽  
pp. 4249
Author(s):  
Felipe Muñoz-La Rivera ◽  
Juan Carlos Vielma ◽  
Rodrigo F. Herrera ◽  
Elisa Gallardo
Keyword(s):  
Structural Engineering ◽  
National Development ◽  
Computer Programs ◽  
Lean Management ◽  
Trial And Error ◽  
Refined Model ◽  
Error Process ◽  
Complex Process ◽  
Aec Industry

Although the architecture, engineering and construction (AEC) industry is highly relevant to national development, it suffers from significant productivity challenges. Beneath the design and documentation of structures, a dynamic, complex process is taking place, with constant modifications and feedback involving numerous professionals from different fields and their respective approaches and work developed using various computer programs. This diversity of factors converges within an iterative trial-and-error process and does not stop until a refined model is achieved. To understand traditional structural engineering companies (SECs) in Chile involved in building private procurement projects, 25 non-value-adding SEC activities were identified and classified according to typical lean management waste categories. These were initially validated by a panel of experts and then confirmed through a survey of 37 companies. The identified activities reduce the productivity of SEC organizations, contributing to low AEC industry indicators.

Convective Losses From Cavity Solar Receivers—Comparisons Between Analytical Predictions and Experimental Results

1983 ◽  
Vol 105 (1) ◽  
pp. 29-33 ◽  
Author(s):  
A. M. Clausing
Keyword(s):  
Experimental Data ◽  
Experimental Evidence ◽  
Analytical Model ◽  
Excellent Agreement ◽  
Experimental Results ◽  
Simple Analytical Model ◽  
Refined Model ◽  
Wall Area

Cavity solar receivers are generally believed to have higher thermal efficiencies than external receivers due to reduced losses. A simple analytical model was presented by the author which indicated that the ability to heat the air inside the cavity often controls the convective loss from cavity receivers. Thus, if the receiver contains a large amount of inactive hot wall area, it can experience a large convective loss. Excellent experimental data from a variety of cavity configurations and orientations have recently become available. These data provided a means of testing and refining the analytical model. In this manuscript, a brief description of the refined model is presented. Emphasis is placed on using available experimental evidence to substantiate the hypothesized mechanisms and assumptions. Detailed comparisons are given between analytical predictions and experimental results. Excellent agreement is obtained, and the important mechanisms are more clearly delineated.

Refined Model for Plasmon Ruler Based on Catenary-Shaped Optical Fields

Plasmonics ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. 845-850 ◽  
Author(s):  
Xiaoliang Ma ◽  
Yinghui Guo ◽  
Mingbo Pu ◽  
Xiong Li ◽  
Xiangang Luo
Keyword(s):  
Refined Model ◽  
Optical Fields ◽  
Plasmon Ruler

Visualization of tetrahedral disordering in amorphous germanium through local atomic motifs

2018 ◽  
Vol 51 (6) ◽  
pp. 1544-1550
Author(s):  
Aly Rahemtulla ◽  
Bruno Tomberli ◽  
Stefan Kycia
Keyword(s):  
Random Network ◽  
Network Models ◽  
Refined Model ◽  
Amorphous Germanium ◽  
Crystalline Materials ◽  
X Ray ◽  
Alignment Procedure ◽  
X Ray Scattering ◽  
Structural Details ◽  
Continuous Random Network

The atomic arrangements in amorphous solids, unlike those in crystalline materials, remain elusive. The details of atom ordering are under debate even in simplistic random network models. This work presents further advancements in the local atomic motif (LAM) method, first through the introduction of an optimized alignment procedure providing a clearer image of the angular ordering of atoms in a model. Secondly, by applying stereographic projections with LAMs, the angular ordering within coordination shells can be quantified and investigated. To showcase the new capabilities, the LAM method is applied to amorphous germanium, the archetype of covalent amorphous systems. The method is shown to dissect structural details of amorphous germanium (a-Ge) from the continuous random network (CRN) model and a reverse Monte Carlo (RMC) refined model fitted to high-resolution X-ray scattering measurements. The LAMs reveal well defined dihedral ordering in the second shell. The degree of dihedral ordering is observed to be coupled to bond length distances in the CRN model. This coupling is clearly not present within the RMC refined model. The LAMs reveal inclusions of third-shell atoms occupying interstitial positions in the second shell in both models.

The Totalitarian Model Revisited

1998 ◽  
Vol 31 (3) ◽  
pp. 271-285 ◽  
Author(s):  
Sujian Guo
Keyword(s):  
Regime Change ◽  
Reference Points ◽  
Political Regime ◽  
Formal Modeling ◽  
Theoretical Problem ◽  
Refined Model ◽  
New Model ◽  
Macro Model ◽  
Communist Countries

A theoretical problem in defining “regime identity” of a political regime in conceptual and comparative terms is that there are no generally accepted theoretical criteria that could be used to demarcate the beginning and ending of a political regime and to assess the nature of a regime change in communist and post-communist countries. This article attempts to address the significance of this problem, revisit the utility of the totalitarian model, and develop a refined macro-model that can serve as the means to solve the problem and as reference points to define regime identity, assess and measure the regime change in theoretical and comparative terms. The refined model can serve both to observe, explain, and predict the regime change in general and to enrich our understanding of specific cases in particular. Based on the insights yielded by the new model, other researchers could modify this model by using techniques of formal modeling or by dropping some features while retaining others of the model.

scholarly journals South African discourse analysis in theory and practice

2008 ◽  
Vol 29 (2) ◽  
pp. 387-406
Author(s):  
A B Du Toit
Keyword(s):  
Discourse Analysis ◽  
South African ◽  
Theory And Practice ◽  
Refined Model

Discourse analysis should not be overly ambitious, but it can be a most helpful exegetical tool if it concentrates on the argumentative flow and thematic aspects of a discourse. A refined model of South African discourse analysis is presented. The different stages in this model are discussed and illustrated by means of Philippians 3:2-11. Special attention is given to problems regarding the dividing of the text into colons.

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