Search results for "control"
showing 10 items of 13168 documents
A Multi-Objective Design Approach for the c Chart Considering Taguchi Loss Function
2014
The present paper proposes a multi-objective design approach for the c chart, considering in the optimization process of the chart parameters both the statistical and the economic objectives. In particular, the minimization of the hourly total quality related costs is the considered objective to carry out the economic goal, whereas the statistical objective is reached by the minimization the out-of-control average run length of the chart. A mixed integer non-linear constrained mathematical model is formulated to solve the treated multi-objective optimization problem, whereas the Pareto optimal frontier is described by the «-constraint method. In order to show the employment of the proposed …
CALIBRATION OF LÉVY PROCESSES USING OPTIMAL CONTROL OF KOLMOGOROV EQUATIONS WITH PERIODIC BOUNDARY CONDITIONS
2018
We present an optimal control approach to the problem of model calibration for L\'evy processes based on a non parametric estimation procedure. The calibration problem is of considerable interest in mathematical finance and beyond. Calibration of L\'evy processes is particularly challenging as the jump distribution is given by an arbitrary L\'evy measure, which form a infinite dimensional space. In this work, we follow an approach which is related to the maximum likelihood theory of sieves. The sampling of the L\'evy process is modelled as independent observations of the stochastic process at some terminal time $T$. We use a generic spline discretization of the L\'evy jump measure and selec…
Wiener-Granger Causality in Network Physiology with Applications to Cardiovascular Control and Neuroscience
2016
Since the operative definition given by C. W. J. Granger of an idea expressed by N. Wiener, the Wiener–Granger causality (WGC) has been one of the most relevant concepts exploited by modern time series analysis. Indeed, in networks formed by multiple components, working according to the notion of segregation and interacting with each other according to the principle of integration, inferring causality has opened a window on the effective connectivity of the network and has linked experimental evidences to functions and mechanisms. This tutorial reviews predictability improvement, information-based and frequency domain methods for inferring WGC among physiological processes from multivariate…
Bloque de constitucionalidad en el Perú: el momento para su redefinición
2020
El bloque de constitucionalidad corresponde al conjunto de normas y principios que, sin formar parte del texto constitucional, comparten su misma jerarquía y obran como criterios para enjuiciar la constitucionalidad de las leyes. La noción es de origen francés y, conforme ha sido creada, es solo para los franceses. Su desarrollo ha logrado resultados favorables en su país. Sin embargo, luego fue adaptada en España, con una realidad diferente resultando una noción multiforme y confusa. Posteriormente fue trasladad a países latinoamericanos adquiriendo en su arraigo características propias; pero su aplicación en el Perú ha tenido resultados similares al caso español. El estudio pretende, desd…
Evaluation of on-line respiratory function monitoring
1998
not available
Riflessioni per una definizione di “prodotto agricolo sostenibile”
2021
Il presente lavoro si propone di riflettere circa i limiti che l’assenza di un’adeguata definizione di “prodotto sostenibile” comporta, tentando una sua ricostruzione pure alla luce di una più ampia analisi del principio di sostenibilità e della sua evoluzione nel corso degli ultimi decenni. L’assenza di un quadro normativo chiaro genera, infatti, incertezze pure in sede di trasmissione al consumatore delle scelte di sostenibilità assunte dalle imprese in ambito agroalimentare, non permettendo a tali soggetti di definire consapevolmente la propria dieta. Il rischio di informazioni ingannevoli e la difficoltà nell’identificare quando i comportamenti assunti siano il risultato di una politica…
A four-session acceptance and commitment therapy based intervention for depressive symptoms delivered by masters degree level psychology students: a …
2013
Background:Depressive symptoms are one of the main reasons for seeking psychological help. Shorter interventions using briefly trained therapists could offer a solution to the ever-rising need for early and easily applicable psychological treatments.Aims:The current study examines the effectiveness of a four-session Acceptance and Commitment Therapy (ACT) based treatment for self-reported depressive symptoms administered by Masters level psychology students.Method:This paper reports the effectiveness of a brief intervention compared to a waiting list control (WLC) group. Participants were randomized into two groups: ACT (n= 28) and waiting list (n= 29). Long-term effects were examined using…
Intermittent Fasting and the Possible Benefits in Obesity, Diabetes, and Multiple Sclerosis: A Systematic Review of Randomized Clinical Trials
2021
Intermittent fasting has become popular in recent years and is controversially presented as a possible therapeutic adjunct. A bibliographic review of the literature on intermittent fasting and obesity, diabetes, and multiple sclerosis was carried out. The scientific quality of the methodology and the results obtained were evaluated in pairs. Intermittent fasting has beneficial effects on the lipid profile, and it is associated with weight loss and a modification of the distribution of abdominal fat in people with obesity and type 2 diabetes as well as an improvement in the control of glycemic levels. In patients with multiple sclerosis, the data available are too scarce to draw any firm con…
Attempts to lose weight among overweight and non-overweight adolescents : a cross-national survey
2007
Background: Despite the global obesity epidemic, few studies have performed cross-national comparisons of adolescents' attempts to lose weight and weight control practices. This study aims to investigate matters mentioned above by weight status in Europe, Israel, and North America. Methods: Nationally representative samples of adolescents from over 30 countries completed an anonymous, standardized questionnaire as part of the Health Behaviour in School-aged Children 2001/2002 survey. The prevalence and likelihood of attempts to lose weight were determined. The effect of weight status, self-perception of overweight, age and country of residence upon the likelihood of current attempts to lose…
Two‐year effect of semaglutide 2.4 mg on control of eating in adults with overweight/obesity: STEP 5
2023
Background: The STEP 5 trial (NCT03693430) investigated once-weekly (OW) subcutaneous semaglutide 2.4 mg vs placebo for the treatment of overweight/obesity in adults over 2 years. Methods: Adults w ith B MI ≥ 3 0 k g/m2, or ≥27 kg/m2 and ≥ 1 weight-related comorbidity, without diabetes, were randomized 1:1 to semaglutide 2.4 mg OW or placebo for 104 weeks. Co-primary endpoints related to body weight (BW) changes. Control of eating questionnaire (CoEQ) was assessed in a subgroup from Canada/USA, with scores from 19 individual items grouped into 4 domains: craving control, craving for savory, craving for sweet, or positive mood. P values for exploratory CoEQ data are unadjusted for multiplici…