scholarly journals Rethinking Classical Precondition Formulas of Changes

2020 ◽  
Vol 16 (2) ◽  
pp. 61-68
Author(s):  
Béla Pataki ◽  
Katalin Pádár
Keyword(s):  
Threshold Value ◽  
Planned Change ◽  
New Model ◽  
Proportional Relation ◽  
The One

Some authors have expressed the most important preconditions of change success in different formulas. All formulas but one comprise a threshold value below which change cannot happen. The one without a threshold presumes proportionality between some factors and change success. These two approaches seemingly contradict each other. This paper resolves the contradiction by proposing a new model that comprises both a threshold value and a modified proportional relation that becomes valid beyond the threshold value. The conventional dimension of the ‘result’ is modified from ‘change’ to ‘attitude towards change’ because attitude in itself cannot guarantee that the planned change actually happens.

Getting Over Athens

2018 ◽  
Author(s):  
Nicolas Wiater
Keyword(s):  
Roman Empire ◽  
The Other ◽  
The Political ◽  
New Model ◽  
Dionysius Of Halicarnassus ◽  
The One

This chapter examines the ambivalent image of Classical Athens in Dionysius of Halicarnassus’ Roman Antiquities. This image reflects a deep-seated ambiguity of Dionysius’ Classicist ideology: on the one hand, there is no question for Dionysius that Athenocentric Hellenicity failed, and that the Roman empire has superseded Athens’ role once and for all as the political and cultural centre of the oikoumene. On the other, Dionysius accepted Rome’s supremacy as legitimate partly because he believed (and wanted his readers to believe) her to be the legitimate heir of Classical Athens and Classical Athenian civic ideology. As a result, Dionysius develops a new model of Hellenicity for Roman Greeks loyal to the new political and cultural centre of Rome. This new model of Greek identity incorporates and builds on Classical Athenian ideals, institutions, and culture, but also supersedes them.

Cycles in symbol production? A new model to explain concentration, diversity and innovation in the music industry

Popular Music ◽  
1995 ◽  
Vol 14 (1) ◽  
pp. 55-93 ◽  
Author(s):  
Michael Christianen
Keyword(s):  
Negative Correlation ◽  
Music Industry ◽  
The Other ◽  
Recording Industry ◽  
Cultural Goods ◽  
New Model ◽  
Advantages And Disadvantages ◽  
Factors Influencing ◽  
Using Data ◽  
The One

With the publication of the article ‘Cycles in symbol production’ (Peterson and Berger 1975) a discussion started concerning the advantages and disadvantages of the production of cultural goods under market conditions. The analysis by Peterson and Berger showed a negative correlation between concentration in the recording industry, on the one hand, and the diversity and innovativeness of the music, on the other. Repetition of the analysis using data from the 1980s (Burnett 1990; Lopes 1992) has shown that for this period Peterson and Berger's hypotheses should be rejected. Is there a connection between concentration and diversity and innovation? Are there cycles in symbol production? There seems to be no conclusive answer. In this article, I will attempt to clear up this matter. First, I will repeat the analysis of the relation between concentration and diversity/innovation, using the same model as Peterson and Berger, but with different definitions for the variables concentration, diversity and innovation. Then I will suggest a new model, which can be helpful in uncovering other factors influencing diversity and innovation in the music industry. I will come to that later. Let me first give the reader a brief overview of previous research.

scholarly journals A New Model Approach for Convective Wall Heat Losses in DQMOM-IEM Simulations for Turbulent Reactive Flows

2018 ◽  
Vol 141 (5) ◽  
Author(s):  
Yeshaswini Emmi ◽  
Andreas Fiolitakis ◽  
Manfred Aigner ◽  
Franklin Genin ◽  
Khawar Syed
Keyword(s):  
Experimental Data ◽  
Heat Losses ◽  
Reacting Flow ◽  
Jet Flame ◽  
New Model ◽  
Turbulent Reactive Flows ◽  
Novel Method ◽  
The One ◽  
The Impact ◽  
Model Approach

A new model approach is presented in this work for including convective wall heat losses in the direct quadrature method of moments (DQMoM) approach, which is used here to solve the transport equation of the one-point, one-time joint thermochemical probability density function (PDF). This is of particular interest in the context of designing industrial combustors, where wall heat losses play a crucial role. In the present work, the novel method is derived for the first time and validated against experimental data for the thermal entrance region of a pipe. The impact of varying model-specific boundary conditions is analyzed. It is then used to simulate the turbulent reacting flow of a confined methane jet flame. The simulations are carried out using the DLR in-house computational fluid dynamics code THETA. It is found that the DQMoM approach presented here agrees well with the experimental data and ratifies the use of the new convective wall heat losses model.

DROPLET FEEDBACK ON VAPOR IN A WARM CLOUD

2009 ◽  
Vol 23 (28n29) ◽  
pp. 5434-5443 ◽  
Author(s):  
ANTONIO CELANI ◽  
ANDREA MAZZINO ◽  
MARCO TIZZI
Keyword(s):  
Numerical Simulations ◽  
Droplet Size ◽  
Cloud Droplet ◽  
Direct Numerical Simulations ◽  
Cloud Droplets ◽  
Size Spectra ◽  
New Model ◽  
Warm Cloud ◽  
Local Reduction ◽  
The One

A new model to study the effect of turbulence on the cloud droplets in the condensation phase is proposed and its behavior investigated by direct numerical simulations. The model is a generalization of the one by Celani, Mazzino, Tizzi, New J. Phys.10, 075021 (2008), where the droplet feedback on vapor is now explicitly taken into account. Physically, it amounts to considering the fact that when a cloud droplet increases its size, vapor is subtracted from the ambient with the net result of a local reduction in the supersaturation field. It is shown how this effect plays to reduce the broadening of droplet size spectra in the condensation stage and thus to produce results in closer agreement with observations.

scholarly journals High occurrence of new particle formation events at the Maïdo high-altitude observatory (2150 m), Réunion (Indian Ocean)

2018 ◽  
Vol 18 (13) ◽  
pp. 9243-9261 ◽  
Author(s):  
Brice Foucart ◽  
Karine Sellegri ◽  
Pierre Tulet ◽  
Clémence Rose ◽  
Jean-Marc Metzger ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Indian Ocean ◽  
Particle Growth ◽  
Threshold Value ◽  
Particle Formation ◽  
New Particle Formation ◽  
The Indian Ocean ◽  
Median Particle ◽  
Particle Sizer ◽  
The One

Abstract. This study aims to report and characterise the frequent new particle formation (NPF) events observed at the Maïdo observatory, Réunion, a Southern Hemisphere site located at 2150 m (a.s.l.) and surrounded by the Indian Ocean. From May 2014 to December 2015, continuous aerosol measurements were made using both a differential mobility particle sizer (DMPS) and an air ion spectrometer (AIS) to characterise the NPF events down to the lowest particle-size scale. Carbon monoxide (CO) and black carbon (BC) concentrations were monitored, as well as meteorological parameters, in order to identify the conditions that were favourable to the occurrence of nucleation in this specific environment. We point out that the annual NPF frequency average (65 %) is one of the highest reported so far. Monthly averages show a bimodal variation in the NPF frequency, with a maximum observed during transition periods (autumn and spring). A high yearly median particle growth rate (GR) of 15.16 nm h−1 is also measured showing a bimodal seasonal variation with maxima observed in July and November. Yearly medians of 2 and 12 nm particle formation rates (J2 and J12) are 0.858 and 0.508 cm−3 s−1, respectively, with a seasonal variation showing a maximum during winter, that correspond to low temperature and RH typical of the dry season, but also to high BC concentrations. We show that the condensation sink exceeds a threshold value (1.04×10−3 s−1) with a similar seasonal variation than the one of the NPF event frequency, suggesting that the occurrence of the NPF process might be determined by the availability of condensable vapours, which are likely to be transported together with pre-existing particles from lower altitudes.

Recursive density equivalents: an improved method for forecasting yield loss caused by mixed weed populations

2005 ◽  
Vol 143 (4) ◽  
pp. 293-298 ◽  
Author(s):  
N. HOLST
Keyword(s):  
Yield Loss ◽  
Published Data ◽  
Improved Method ◽  
Seedling Density ◽  
Weed Species ◽  
New Model ◽  
Hyperbolic Curve ◽  
Theoretical Paper ◽  
The One ◽  
Crop Weed Competition

Simple models that can forecast yield loss from weed seedling density at crop emergence are useful tools for both research and practice. In 1985 Cousens presented the rectangular hyperbolic curve as a solution to this problem for the one-weed species case (Cousens 1985a). To address the multi-weed species case, the present theoretical paper investigates two published models and develops a third model, termed ‘recursive density equivalents’. The models were analysed and evaluated based on their biological rationale and using already published data. The earlier models were both found to rely on biologically unrealistic assumptions. The new model avoided additional assumptions, providing a neutral method of summarizing the Cousens curves for many species. Recursive density equivalents were found to be additive in a more intuitive fashion than the ‘density equivalents’ introduced earlier. An over-estimation bias was found to be inherent in the earlier density equivalents model, increasing with species richness. The new model corrected for this bias when checked against one year's field data but for another year, both models over-estimated markedly. All three models were found to be too simple to accommodate all possible modes of intra- and inter-specific competition, yet the new model is an improvement, as it agrees better with the biological principles of crop-weed competition.

INDUCED MONOCULTURE IN AXELROD MODEL WITH CLEVER MASS MEDIA

2009 ◽  
Vol 20 (08) ◽  
pp. 1233-1245 ◽  
Author(s):  
AREZKY H. RODRÍGUEZ ◽  
M. del CASTILLO-MUSSOT ◽  
G. J. VÁZQUEZ
Keyword(s):  
Vector Field ◽  
Mass Media ◽  
Social Systems ◽  
Threshold Value ◽  
New Model ◽  
Negative Publicity ◽  
Two Parameters ◽  
Multicultural States ◽  
Confidence Value ◽  
Opposite Line

A new model is proposed, in the context of Axelrod's model for the study of cultural dissemination, to include an external vector field (VF) which describes the effects of mass media on social systems. The VF acts over the whole system and it is characterized by two parameters: a nonnull overlap with each agent in the society and a confidence value of its information. Beyond a threshold value of the confidence, there is induced monocultural globalization of the system lined up with the VF. Below this value, the multicultural states are unstable and certain homogenization of the system is obtained in opposite line up according to that we have called negative publicity effect. Three regimes of behavior for the spread process of the VF information as a function of time are reported.

Optimal and Greedy Algorithms for the One-Dimensional RSU Deployment Problem With New Model

2018 ◽  
Vol 67 (8) ◽  
pp. 7643-7657 ◽  
Author(s):  
Zhenguo Gao ◽  
Danjie Chen ◽  
Shaobin Cai ◽  
Hsiao-Chun Wu
Keyword(s):  
Greedy Algorithms ◽  
New Model ◽  
One Dimensional ◽  
The One

Dynamics-based control of a one-legged hopping robot

2003 ◽  
Vol 217 (2) ◽  
pp. 83-98 ◽  
Author(s):  
S H Hyon ◽  
T Emura ◽  
T Mita
Keyword(s):  
Complex Analysis ◽  
Dynamics Model ◽  
Linear Complex ◽  
Actuator Dynamics ◽  
New Model ◽  
Rapid Movement ◽  
Hopping Robot ◽  
Non Linear ◽  
The One

This paper proposes a new model of a one-legged hopping robot. The one-legged hopping robot is useful in realizing rapid movement such as that of a running animal. Although it has a simple leg mechanism, the dynamics are not simple and require non-linear complex analysis. This means that it is not easy to derive a controller for stable hopping in a systematic way. Therefore, a dynamics-based approach was introduced where the controller is empirically derived based on characteristic dynamics. A prototype of the one-legged hopping robot was fabricated and a precise simulator of the robot, including actuator dynamics, was constructed to examine the usefulness of the proposed dynamics model. Applying the constructed simulator to the prototype, the robot succeeded in planar one-legged hopping.

scholarly journals ¿Es posible lograr LaLiga más emocionante?

2019 ◽  
Vol 8 (2) ◽  
pp. 7-15
Author(s):  
M. Pic ◽  
PR García-Díaz
Keyword(s):  
Public Interest ◽  
Ranking System ◽  
New Model ◽  
Internal Logic ◽  
Wide Range ◽  
Alternative Ranking ◽  
The One ◽  
Different Levels

El objetivo principal de este estudio es estimular el interés público por el campeonato LaLiga. Para ello, se propone un sistema de clasificación alternativo que utiliza variables derivadas de la lógica interna del fútbol y la calidad de los distintos equipos. Aplicando el índice de concordancia de Kendall, las dos clasificaciones se compararon partido a partido, demostrando la viabilidad del nuevo modelo con distintos niveles de competitividad. Las propiedades y limitaciones del modelo fueron comparadas con el modelo empleado actualmente en LaLiga. Proporcionar un proceso que tenga en cuenta la amplia gama de calidad de los equipos que juegan en LaLiga es una alternativa destinada a fomentar la competitividad del campeonato. The ranking of LaLiga championship for the 2008/09 season was one of the poorest ever in terms of uncertainty. The main aim of this study is to stimulate public interest in the Spanish League championship. To achieve this, an alternative ranking system is proposed using variables derived from soccer’s internal logic and the quality of the various teams. Applying Kendall’s index of concordance, the two rankings were compared play by play demonstrating the viability of the new model, with different levels of competitiveness. The properties and limitations of the model were compared with the one currently used by LaLiga. Providing a process which makes allowances for the wide range of quality of the teams playing in LaLiga is an alternative intended to foment the competitiveness of the championship.

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