A probability model of three potential precursors during tornado occurrences: the Italian case.

2020 ◽  
Author(s):  
Roberto Ingrosso ◽  
Piero Lionello ◽  
Mario Marcello Miglietta ◽  
Gianfausto Salvadori
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Wind Shear ◽  
Meteorological Parameters ◽  
Probability Model ◽  
Conditional Probabilities ◽  
Homogeneity Tests ◽  
Probability Of Occurrence ◽  
Italian Case ◽  
The Way

<p>57 tornadoes with intensity Enhanced Fujita Scale 2 or larger that occurred in Italy in the period 2000–2018 are analysed in order to investigate the way two meteorological parameters, namely Wind Shear, calculated in 0-1 km and 0-6 km layers, and CAPE, affect their development. For this purpose, a statistical analysis, by means of homogeneity tests, conditional probabilities and a multivariate analysis via copulas is performed, using two different re-analysis datasets (ERA-Interim and ERA-5). The study indicates that: (a) tornadoes occur mostly in correspondence with positive anomalies of both variables; (b) probability of occurrence is correlated with WS, and (c) is maximum when either WS or CAPE are large. Also, the probability does not increase significantly with CAPE, although sufficiently large values are needed for tornado occurrence. These results are similar for both re-analyses we used and suggest that the selected parameters are reliable precursors for Italian tornadoes.</p>

Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Classification Scheme ◽  
Analytical Procedure ◽  
Narrow Band ◽  
Scientific Research ◽  
Maximum Amount ◽  
Amount Of Information

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

Evaluation software for effects produced by MOOC in mediums with different linguistically levels

2018 ◽  
Vol 34 (3) ◽  
pp. 633-645
Author(s):  
Cornel Samoilă ◽  
Doru Ursuţiu ◽  
Vlad Jinga
Keyword(s):  
Statistical Analysis ◽  
Statistical Methods ◽  
Rapid Assessment ◽  
Assessment Method ◽  
Behavioral Changes ◽  
Strong Negation ◽  
Face To Face ◽  
Made In ◽  
The Way

Abstract MOOC appearance has produced, in a first phase, more discussions than contributions. Despite pessimistic opinions or those catastrophic foreseeing the end of the classic education by accepting MOOC, the authors consider that, as it is happening in all situations when a field is reformed, instead of criticism or catastrophic predictions, an assessment should be simply made. MOOC will not be better or worse if it is discussed and dissected but can be tested in action, perfected by results, or abandoned if it has no prospects. Without testing, no decision is valid. A similarity between the MOOC appearance and the appearance of the idea of flying machines heavier than air can be made. In the flight case, the first reaction was a strong negation (including at Academies level) and only performing the first independent flight with an apparatus heavier than air has shifted orientation from denial to contributions. So, practical tests clarified the battle between ideas. The authors of this article encourage the idea of testing–assessment and, therefore, imagined and proposed one software for quickly assess whether MOOC produces changes in knowledge, by simply transferring courses from ‘face-to-face’ environment into the virtual one. Among the methods of statistical analysis for student behavioral changes was chosen the Keppel method. It underpins the assessment method of this work being approached using both the version with one variable and also with three variables. It is intended that this attempts to pave the way for other series of rapid assessment regarding MOOC effects (using other statistical methods). We believe, that this is the only approach that can lead either to improve the system or to renunciation.

scholarly journals Analysis of soil radon data in earthquake precursory studies

2014 ◽  
Vol 57 (5) ◽  
Author(s):  
Hari Prasad Jaishi ◽  
Sanjay Singh ◽  
Raghavendra Prasad Tiwari ◽  
Ramesh Chandra Tiwari
Keyword(s):  
Statistical Analysis ◽  
Multiple Regression ◽  
Radon Concentration ◽  
Seismic Activity ◽  
Meteorological Parameters ◽  
Regression Method ◽  
Seismic Zone ◽  
Type Ii ◽  
Soil Radon ◽  
Multiple Regression Method

<p>Soil radon data were recorded at two selected sites along Mat fault in Mizoram (India), which lies in the highest seismic zone in India. The study was carried out during July 2011 to May 2013 using LR-115 Type II films. Precursory changes in radon concentration were observed prior to some earthquakes that occurred around the measuring sites. Positive correlation was found between the measured radon data and the seismic activity in the region. Statistical analysis of the radon data together with the meteorological parameters was done using Multiple Regression Method. Results obtained show that the method employed was useful for removing the effect of meteorological parameters and to identify radon maxima possibly caused by seismic activity.</p>

scholarly journals Some Voices from Italian Youth on Well-Being: How to Cope with Job Insecurity?

2020 ◽  
Vol 9 (4) ◽  
pp. 58
Author(s):  
Rosy Musumeci ◽  
Chiara Ghislieri
Keyword(s):  
Young People ◽  
Coping Strategies ◽  
Job Insecurity ◽  
Well Being ◽  
Italian Case ◽  
Familial Support ◽  
Quantitative Studies ◽  
Public Resources ◽  
The Individual ◽  
The Way

’Insecure’ jobs and alternating between periods of unemployment and periods of employment under fixed-term contracts are increasingly widespread among the youth in Europe. This phenomenon is an important risk factor for young people’s well-being. Despite the growing number of studies, some issues have still not been adequately addressed. Compared to the high number of quantitative studies, the number of qualitative researches is limited: in fact, few studies have tackled this topic from a qualitative standpoint, highlighting the dynamics and the subjective processes which operate in this relationship and considering the different functions that work can have for the individual. Another aspect that has not been adequately dealt with is represented by the coping strategies that young people put in place to deal with job insecurity, and which have consequences on their well-being. The present article on the Italian case is intended to give a contribution in these directions. In particular, it analyses the way in which a group of 40 unemployed or temporarily employed young people, in-depth interviewed, subjectively describe the relationship between job insecurity and well-being, and reflects on coping strategies to face job insecurity and related perceived consequences. In doing this, the authors consider the role of individual factors, as well as of meso and macro ones, given that—for example—the national contexts have a role in influencing the way in which job insecurity is perceived and managed by individuals. The results highlight the complexity of this relationship, in which the intertwining of factors at different levels plays a very important role in determining the coping strategies and the overall well-being of people: individually, like the functions and the subjective meanings of work for the youth, but also in meso and macro terms, such as the familial support and relationships, and the institutional and public resources available.

Gender and Generation Effects on Person Perception

1980 ◽  
Vol 11 (4) ◽  
pp. 307-318 ◽  
Author(s):  
Kay C. Sharp ◽  
Sandra G. Candy ◽  
Lillian E. Troll
Keyword(s):  
College Students ◽  
Multivariate Analysis ◽  
Sex Differences ◽  
Analysis Of Variance ◽  
Generational Differences ◽  
Person Perception ◽  
Multivariate Analysis Of Variance ◽  
Men And Women ◽  
Wide Range ◽  
The Way

It has been assumed that the characteristics of respondents, such as their sex, background and socialization experiences, would affect the way in which respondents perceive other persons. Sex differences have been found in college students, but generational differences have not been explored. The present study employed one hundred fifty men and women, of non-college background and of a wide range of ages, and permitted free responses in respondents' descriptions. The effect of gender and generation on the categories participants used to describe a known man and woman was examined. A multivariate analysis of variance indicated significance on both variables. However, subsequent one-way analyses of variance revealed that only a few categories were used differentially by men and women, or by the older, middle and younger generations.

scholarly journals Statistical Analysis of SO2 and NO2 with Respect to Meteorological Parameters (Gwalior, India)

2021 ◽  
Vol 22 (2) ◽  
pp. 280-287
Author(s):  
Mehraj ud din Bhat ◽  
Anish C Pandey
Keyword(s):  
Statistical Analysis ◽  
Meteorological Parameters ◽  
Sodium Hydroxide Solution ◽  
Stable Solution ◽  
Ambient Air ◽  
New Delhi ◽  
Air Stream ◽  
Different Seasons ◽  
Indian Meteorological Department

The present study is carried out in Gwalior to know the level of pollutants viz sulphur dioxide (SO2) and nitrogen dioxide (NO2). In this study, both NO2 and SO2 were collected during different seasons, and estimation was done using chemical methods. The methods used for the determination of SO2 and NO2 in the ambient air of Gwalior was (Modified West and Geake method) and (Modified Jacob and Hochheisier). The SO2 from the air stream was absorbed in a sodium tetramer curate solution. NO2 was collected by bubbling air through a sodium hydroxide solution to form a stable solution of sodium nitrate. Meteorological parameters like temperature, relative humidity were recorded by thermometers and hygrometry during the sampling. Rainfall data was taken from Indian Meteorological Department, New Delhi, for four sampling years. The statistical analysis was carried out between the level of pollutants SO2 and NO2 measured and meteorological parameters recorded during the sampling. This study observed that pollutants were very high in winter and summer compared to monsoon and post-monsoon periods due to the heavy transport movement and favourable meteorological conditions like temperature, humidity, rainfall, and wind speed and directions.

scholarly journals The Transformations of Travel during the Revolution and the Empire: the Italian Case

Viatica ◽  
2017 ◽  
Author(s):  
Gilles BERTRAND ◽  
Keyword(s):  
Strong Impact ◽  
Ancien Regime ◽  
Experimental Field ◽  
Italian Case ◽  
First Empire ◽  
Ancien Régime ◽  
The Way ◽  
The Revolution

This article studies the situation of French travellers in Italy during the Revolution and the First Empire. Revolutionary unrest and breaks with the Ancien Régime had a strong impact on the way Europeans travelled during this period. In addition to the nobles and the literate who continued to travel, other members of the population and new travel areas for exploration appeared. According to the Venetian archives dating from 1789 to 1796, Italy, a welcoming land for some, became an experimental field for strategies with political and scientific stakes.

scholarly journals Influence of some specific meteorological events on indoor radon dynamic in western Switzerland

2021 ◽  
Vol 2042 (1) ◽  
pp. 012138
Author(s):  
J Rey ◽  
S Goyette ◽  
M Palacios ◽  
F Barazza ◽  
M Gandolla ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Air Temperature ◽  
Meteorological Parameters ◽  
Indoor Radon ◽  
Indoor Environments ◽  
Outdoor Air ◽  
Indoor Radon Concentration ◽  
Weather Events ◽  
The World ◽  
Basic Statistical Analysis

Abstract Radon is a natural radioactive gas that may cumulate in indoor environments. The impacts of weather events on indoor radon concentration had been explored in different places around the world but only marginally in Switzerland. Using basic statistical analysis, this study investigates different meteorological parameters’ influence on indoor radon concentrations and shows that outdoor air temperature is the most influential beyond others. Finally, this paper highlights the importance of radon dynamic in buildings, a topic often overlooked by construction professionals and the broader public in Switzerland.

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