646 research outputs found
A hierarchical model for volcanic repose times
No full textNell’ambito della vulcanologia è complicato provare che un vulcano sia estinto o solo
dormiente, se non mostra segni di attività. Il problema di stabilire un periodo di inattività minimo,
dopo il quale si possa escludere, con una certa probabilità, la possibilità di un'eruzione futura,
risulta rilevante se si considera che le eruzioni più esplosive avvengono, usualmente, dopo lunghi
periodi di inattività.
Si ha a disposizione un catalogo con i tempi di riposo precedenti e successivi alle eruzioni più
estreme della Terra, suddivisi per vulcano di appartenenza. Si considera una struttura gerarchica
per la modellazione dei tempi di riposo, in cui i parametri corrispondenti ad ogni singolo vulcano
vengono considerati delle realizzazioni da una distribuzione comune
Hierarchical random effect models for coastal erosion of cliffs
No full textIl programma di monitoraggio della costa di Holderness, iniziato nel 1951,
fornisce un’inestimabile sorgente di informazioni spazio-temporali del fenomeno dell’erosione
costiera. Capire e prevedere l’entità dell’attività erosiva è importante per un’adeguata
pianificazione dell’uso del territorio. Fino a poco tempo fa i metodi previsivi utilizzati
nell’ambito dell’erosione costiera sono stati di tipo deterministico; solo negli ultimi anni
si è cominciato ad utilizzare semplici modelli probabilistici per catturare la forte variabilità del processo erosivo. Il nostro scopo, presentando un modello gerarchico a effetti
casuali, è quello di migliorare tali modelli cercando di utilizzare al meglio le conoscenze
sulle dinamiche dell’erosione costiera. Si presenta anche una soluzione al problema dei
dati mancanti, attraverso tecniche di Reversible Jump MCMC
George MacLeod’s open-air preaching: performance and counter-performance
No full textStuart Blythe uses the methodology of performance to analyse George MacLeod’s open-air preaching. He points out that MacLeod’s preaching was derived from a theology of the incarnation, and an understanding of the paradoxes and dichotomies of common human life. This preaching, Blythe suggests, was also a counter-performance in the context of outlooks and ideologies inimical to the gospel. The paper raises interesting issues related to preaching as performance, and the further question as to whether or not the life and work of the Church as a whole might now be better understood as a counter-performance.Publisher PD
Peak nasal inspiratory flow; normal range in adult population
No full textAIMS: Measurement of Peak Nasal Inspiratory Flow (PNIF) seems to be a cheap,
simple, easily performed method to assess nasal patency. The purpose of this
study is to establish normative PNIF data for a healthy adult population and
provide charts relating PNIF normal values with age, height and sex in adults.
METHODS AND RESULTS: Repeated measurements of PNIF were performed in 170
volunteers. In total, 137 of these fulfilled the study criteria (66 females and
50 males) and all of them were non-smokers, non-asthmatic, without nose and
paranasal sinuses problems, with ages ranging from 16 to 84 years. Data were
statistically analysed and tables were produced relating PNIF to age, sex and
height. There was no interaction of sex with age or height. There was
considerable residual variability of PNIF between individuals not explained by
any of the variables studied.
CONCLUSIONS: We conclude that PNIF could be a useful method to study nasal
patency in both primary and secondary care to aid diagnosis of nasal disease. The
study provides normative data for a Caucasian population. Further variables need
to be explored to predict expected PNIF values more accurately
Does peak nasal inspiratory flow relate to peak expiratory flow?
No full textAIMS: Measurement of Peak Nasal Inspiratory Flow (PNIF) seems to be a cheap and
easily performed method to assess nasal patency. As demonstrated in a previous
work, PNIF is influenced by SEX, AGE and HEIGHT. However there is a large degree
of between-patient variability in PNIF levels. The purpose of this analysis is to
determine whether the measurement of the pulmonary ventilatory capacity, by mean
of Peak Expiratory Flow (PEF), enables more precise determination of PNIF.
METHODS AND RESULTS: Repeated measurements of PNIF and PEF were performed in 112
volunteers. 100 of these fulfilled the study criteria (55 females and 45 males)
and all of them were non-smokers, non-asthmatic, without nose and paranasal
sinuses problems, with ages ranging from 15 to 71 years. Statistical analysis was
undertaken to determine whether a relationship existed between PNIF and age, sex
and height, but which also considered PEF. The data from both experiments were
analysed together. In both groups there is a clear tendency for PNIF to increase
with PEF. As clearly demonstrated in this work the value of PEF is informative in
predicting PNIF and that the larger the value of PEF, the larger the value of
PNIF.
CONCLUSIONS: PNIF is a useful method to study nasal patency in both primary and
secondary care to aid diagnosis of nasal disease, but low values of PNIF have to
be confirmed by a study of the PEF as PNIF low values may be an expression of low
ventilatory activity rather than an expression of nasal obstruction
Redemption in the work of Francis Stuart
No full textThe idea of redemption is central to an understanding of the work
of Francis Stuart. Through an examination of its development and
expression, it is possible to demonstrate the integrity of his work and
its distinctive qualities. Such a demonstration is necessary because
Stuart's writing has been subjected to comparatively little scholarly
inquiry, although reviews of his work, especially that produced since
1949, suggest that it is impressive and important.
First, a general background to Stuart's work, a discussion of the
special problems associated with reading it, and a summary of his corpus
is provided. This indicates that the idea of redemption is important to
his earliest writing. The state of redemption is shown to be a
necessary apotheosis for Stuart's outcast heroes; it involves spiritual
suffering through which may be found a sense of reintegration and a
higher reality. This is expressed through interrelated themes such as
those of gambler, artist and ordinary man; mystic and criminal; sacred
and profane love; and spirituality and the mundane. The nature of the
redemptive experience is further elaborated by distinctive, complex
motifs, especially the hare, the ark and the woman-Christ. Their
recurrence provides an important element in the unity of Stuart's work.
Because Stuart's idea of the outcast raises important biographical
questions, an examination of the relationship between Stuart's life and
his work is made. Finally, the way in which the idea of redemption
exists in the language structures of Stuart's novels is examined, with
especial reference to his most recent work, The High Consistory. The
thesis shows that the development of the these of redemption
demonstrates the integrity of Stuart's work
Nasal functional modifications after physical exercise: olfactory threshold and peak nasal inspiratory flow
No full textStatement of problem: The respiratory nasal effects of physical exercise have been extensively
investigated; on the other hand there are no data regarding olfactory threshold modification
after aerobic physical exercise.
Methods: The present prospective study investigated the modifications in nasal respiratory
flows and olfactory thresholds after controlled aerobic physical exercise in a cohort of 15 adult,
healthy volunteers. The Peak Nasal Inspiratory Flow (PNIF), and the Sniffin’ Sticks olfactory
threshold test were used for our determinations.
Main results: The mean PNIF after physical exercise was significantly higher than the mean
PNIF value found before physical exercise. Statistical analysis ruled out any significant difference
between mean olfactory thresholds pre vs post physical exercise.
Principal conclusions: These outcomes confirmed PNIF sensitivity and reliability also in determining
the changes in nasal patency occurring after physical exercise. The active vasoconstriction
of nasal mucosa associated with the reduction of blood flow to the olfactory epithelium
due to physical exercise may be compensated for by the increase of olfactory molecules that
reach the olfactory mucosa because of nasal mucosal shrinkage: this mechanism could explain
the stability of mean olfactory threshold after physical exercise
Studio statistico delle attivita' di un centro linguistico: proposta di miglioramento
No full textopenPer consultare la versione cartacea, rivolgersi al Deposito di Legnaro: e-mail [email protected]; Per problemi con il full-text, rivolgersi alla biblioteca : e-mail [email protected] tesi possono avere una copia cartacea conservata al Deposito di Legnaro ed una copia elettronica, vedi PDF allegat
Applicazione della teoria dei valori estremi per la stima della dimensione massima delle cellule degli alberi
No full textopenPer consultare la versione cartacea, rivolgersi al Deposito di Legnaro: e-mail [email protected]; Per problemi con il full-text, rivolgersi alla biblioteca : e-mail [email protected] tesi possono avere una copia cartacea conservata al Deposito di Legnaro ed una copia elettronica, vedi PDF allegat
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