scholarly journals Author Correction: The quest for a unified theory on biomechanical palm risk assessment through theoretical analysis and observation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Peter Sterken
Keyword(s):  
Risk Assessment ◽  
Theoretical Analysis ◽  
Unified Theory

scholarly journals The quest for a unified theory on biomechanical palm risk assessment through theoretical analysis and observation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Peter Sterken
Keyword(s):  
Mathematical Model ◽  
Risk Assessment ◽  
Wind Speed ◽  
Theoretical Analysis ◽  
Mechanical Behaviour ◽  
Beam Theory ◽  
Wind Loading ◽  
Unified Theory ◽  
Simple Mathematical Model ◽  
Wide Range

AbstractSeveral methodologies related to the biomechanical risk assessment and the uprooting and breaking potential of palms are reviewed and evaluated in this study. Also a simple mathematical model was designed, to simulate the results of critical wind speed predictions for a tall coconut palm by using classic beam theory and Brazier buckling. First, the review presents arguments that assess the applicability of some influential claims and tree and palm risk assessment methods that have been amply marketed in the last 20 years. Then, the analysis goes beyond the classical procedures and theories that have influenced the arboricultural industry and related press so far. And afterwards, rationale behind several postulated ideas are presented, that are hoped to be fruitful in the path towards a new biomechanical theory for the biomechanical risk assessment of palms. The postulated model envisages the palm stem as a viscoelastic and hollow cylinder that is not only prone to buckling, ovalization and kinking, but also fatigue, shear, splitting and crack propagation. This envisaging was also the main reason why simple Brazier buckling formulation was experimentally applied to simulate the breaking risk of a cocostem. This study also enables a better understanding of the wide range of factors that may influence the mechanical behaviour of trees and palms under (wind) loading.

A Unified Theory for Microbial Growth Controlled by Multiple Limiting Substances

1988 ◽  
Vol 20 (11-12) ◽  
pp. 513-515 ◽  
Author(s):  
Chung-Yuan Chen
Keyword(s):  
Risk Assessment ◽  
Wastewater Treatment ◽  
Nutrient Limitation ◽  
Kinetic Models ◽  
Enzyme Catalysis ◽  
Microbial Growth ◽  
Unified Theory ◽  
Limited Growth ◽  
Broad Application ◽  
Multiple Substance

Generally speaking, models dealing with multiple limiting substances have mainly been derived from three different categories of studies, namely, multiple toxicity, multiple nutrient limitation and inhibition of enzyme catalysis. As different basic mechanisms were assumed by these models, a simple and unique theory which handles all these types of multiple-substance limited growth does not appear to exist. This paper presents a unified theory, based on a probabilistic foundation, for microbial growth controlled by multiple limiting substances (including both nutrient and toxicant). Most of the existing kinetic models in the aforementioned three areas can be generated using one theory. The theory has a broad application in many aspects, e.g. wastewater treatment, eutrophication studies, risk assessment, etc.

A theoretical analysis of congestion in a two-lane freeway

1970 ◽  
Vol 7 (2) ◽  
pp. 304-315
Author(s):  
Donald R. Mcneil
Keyword(s):  
Theoretical Analysis ◽  
Statistical Mechanics ◽  
Mathematical Theory ◽  
Road Traffic ◽  
Unified Theory ◽  
Conservation Of Mass ◽  
Limited Class

To current workers in the mathematical theory of road traffic, one of the most challenging and important problems is to describe and analyze the congestion suffered by motorists on freeways. While there is, as yet, no satisfactory unified theory, several different models have been suggested, each of which is reasonable for a limited class of situations. These approaches fall largely into two categories. The first may be described as looking at traffic “in the large” and its principal exponents were Lighthill and Whitham (1955) and Prigogine (1961). The theory of Lighthill and Whitham involves treating the system of vehicles as a fluid subject to a rule of conservation of mass (that is, vehicles) and an assumed relation between the flow and concentration at each point. This theory is completely deterministic. Prigogine's approach is to regard the system of vehicles as behaving like the particles in a gas and subject to the laws of statistical mechanics.

A theoretical analysis of congestion in a two-lane freeway

1970 ◽  
Vol 7 (02) ◽  
pp. 304-315
Author(s):  
Donald R. Mcneil
Keyword(s):  
Theoretical Analysis ◽  
Statistical Mechanics ◽  
Mathematical Theory ◽  
Road Traffic ◽  
Unified Theory ◽  
Conservation Of Mass ◽  
Limited Class

To current workers in the mathematical theory of road traffic, one of the most challenging and important problems is to describe and analyze the congestion suffered by motorists on freeways. While there is, as yet, no satisfactory unified theory, several different models have been suggested, each of which is reasonable for a limited class of situations. These approaches fall largely into two categories. The first may be described as looking at traffic “in the large” and its principal exponents were Lighthill and Whitham (1955) and Prigogine (1961). The theory of Lighthill and Whitham involves treating the system of vehicles as a fluid subject to a rule of conservation of mass (that is, vehicles) and an assumed relation between the flow and concentration at each point. This theory is completely deterministic. Prigogine's approach is to regard the system of vehicles as behaving like the particles in a gas and subject to the laws of statistical mechanics.

scholarly journals RESEARCH OF THE EFFICIENCY OF LITHUANIAN BANKS CREDIT GRANTING PROCESS

2021 ◽  
Author(s):  
Ilona SKAČKAUSKIENĖ ◽  
Anastasija BUSARĖVA
Keyword(s):  
Risk Assessment ◽  
Theoretical Analysis ◽  
Empirical Research ◽  
Research Methodology ◽  
Questionnaire Survey ◽  
Scientific Literature ◽  
Financial Indicators ◽  
Credit Portfolio ◽  
Credit Granting ◽  
Practical Implications

Purpose – to evaluate the efficiency of the credit provision process of Lithuanian banks, to submit suggestions for improvement. Research methodology – after the theoretical analysis of the efficiency of the credit granting process was developed, an empirical research using the methods of questionnaire survey and analysis of financial indicators was carried out. Findings – efficiency is usually lost at the stages of consideration of application, conclusion of credit portfolio and risk assessment. These factors were distinguished from all efficiency reducing factors: time consuming processes, not automatized stages, insufficiently informed customer. Research limitations – methods of analysis of scientific literature are limited, but they enable the analysis and identifi- cation of the efficiency of credit provision within the research. Practical implications – the article evaluates the efficiency of credit provision by selected banks and proposes measures to streamline the process. By applying the proposed measures, banks could increase the efficiency of the credit granting process. Originality/Value – previously, the effectiveness of credit granting process in Lithuanian banks has not been assessed.

The Unified Theory of Tubesheet Design - Part II: Supplement to the Theoretical Analysis

2021 ◽  
Author(s):  
Hong-Song Zhu ◽  
Jinguo Zhai
Keyword(s):  
Theoretical Analysis ◽  
Heat Exchangers ◽  
Theoretical Foundation ◽  
Unified Theory

Abstract The theoretical foundation of the unified theory of tubesheet(TS) design for fixed tubesheet (TS) heat exchangers (HEX), floating head and U-tube HEX is presented in Part I, in which only the most important equations are addressed to show the main points of the theory. The referenced equations, conclusions and other aspects be referenced in Part I are presented or proved in this paper as Part II to supplement the theoretical analysis in Part I.

Microdiffraction Patterns of Small Metallic Particles II; Theoretical Analysis

1982 ◽  
Vol 40 ◽  
pp. 668-669
Author(s):  
A. Gómez ◽  
P. Schabes-Retchkiman ◽  
M. José-Yacamán ◽  
T. Ocaña
Keyword(s):  
Experimental Data ◽  
Electron Diffraction ◽  
Theoretical Analysis ◽  
Size Range ◽  
Dynamical Theory ◽  
Metallic Particles ◽  
Splitting Effect

The splitting effect that is observed in microdiffraction pat-terns of small metallic particles in the size range 50-500 Å can be understood using the dynamical theory of electron diffraction for the case of a crystal containing a finite wedge. For the experimental data we refer to part I of this work in these proceedings.

Risk assessment in dentistry

1998 ◽  
Vol 62 (10) ◽  
pp. 756-761 ◽  
Author(s):  
CW Douglass
Keyword(s):  
Risk Assessment
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