Search results for "back"

Effects of mandibular setback surgery on upper airway dimensions and their influence on obstructive sleep apnoea - a systematic review.

2015

Abstract Background Mandibular setback used to be the traditional treatment of choice for correcting mandibular prognathism. Nowadays, bimaxillary surgery is preferred. Several authors have asserted that mandibular setback causes a relative narrowing of the upper airway (UA) that could trigger obstructive sleep apnoea (OSA); however, its potential role in OSA development is still much debated. Another controversial subject is whether changes in airway space caused by the procedure are permanent. Objectives To ascertain the consequences for UA size and shape of mandibular setback surgery in comparison with bimaxillary surgery (maxillary advancement with Le Fort I and mandibular setback), and…

A sustainable phenolic compound extraction system from olive oil mill wastewater

2017

Abstract The reduction of environmental impact and the achievement of economic advantages based on by-product recovery is the aim of applying methodologies for phenolic compounds extraction from Olive Oil Mill Wastewater. Volume reduction of Olive Oil Mill Wastewater could generate important advantages in terms of waste disposal cost abatement and, in addition, reuse in the production of foods with health properties could lead to economic benefits. Despite the fact that literature shows that several techniques have been developed, few economic approaches have been presented. This paper assesses the economic feasibility of a system based on membrane filtration and reverse osmosis processes f…

The influence of negative emotions on brand trust and intention to share cause-related posts: A neuroscientific study

2023

Negative user-generated content provides cues that warn other consumers to avoid using a particular product or service. This study explores whether brand feedback can counteract consumer backlash to a given company’s cause-related marketing, with a particular focus on how visual attention can moderate negative emotions. Hypotheses based on the Appraisal-Tendency Framework and commitment-trust theory were tested using neurophysiological tools (eye tracking and facial coding) and self-reported measures. The findings suggest that emotions with similar valence and arousal levels cause differing trust perceptions and consumer behavioral responses (sharing intentions), based on the presence or ab…

Can goal setting and performance feedback enhance organizational citizenship behavior?

2008

Moving Away from Patronage: A Feedback Approach

2022

Patronage appointments in government are a continuing issue in many administrative systems. Especially for countries in Latin America and Africa patronage is considered a major impediment to developing more effective administrative systems. A great deal has been written describing patronage and discussing the causes for patronage, but much less research has addressed the dynamics of moving away from patronage to more merit-based systems. This paper reviews the patronage literature and then develops a dynamic feedback model for movement away from patronage. The model links the quality of the services provided by the government, the nature of the political party system, and levels of trust t…

With great power comes great responsibilities – Examining platform-based mechanisms and institutional trust in rideshare services

2023

From the perspective of female passengers, much remains unknown about institutional or platform trust and the sharing economy. The present study was conducted in an emerging economy context to comprehend the significance of institutional trust. The study aimed to develop a dynamic theoretical model incorporating the perceived effectiveness of platform-based institutional structures (PEPIS) as a dependent variable in sharing economy platforms, examine the antecedents of PEPIS and determine how PEPIS affects female passengers' trust in the institution or platform. Different strata of female passengers were targeted using a quota-cum-purposive sampling method. In total, 413 useable responses t…

Extracting science from Mössbauer spectroscopy on Mars

2003

[1] Deployment by the Mars Exploration Rovers of backscatter Mossbauer spectrometers offers an incredible opportunity to (1) elucidate the iron mineralogies of rocks, soils, and atmospheric dust and (2) gain insight into the physical event by which the mineralogy came into existence and consequently acquire information having potential for yielding ancient planetary history relevant to broad issues including the question of life. Determining the mineralogy is done by subjecting raw data to reduction algorithms and generating products known as Mossbauer parameters, which are highly characteristic. Mixed mineralogies are treated through deconvolution. Through being able to exploit Mossbauer m…

2019

Previous research has consistently shown that for sounds varying in intensity over time, the beginning of the sound is of higher importance for the perception of loudness than later parts (primacy effect). However, in all previous studies, the target sounds were presented in quiet, and at a fixed average sound level. In the present study, temporal loudness weights for a time-varying narrowband noise were investigated in the presence of a continuous bandpass-filtered background noise and the average sound levels of the target stimuli were varied across a range of 60 dB. Pronounced primacy effects were observed in all conditions and there were no significant differences between the temporal w…

Effects of heat treatments on the properties of copper phthalocyanine films deposited by glow-discharge-induced sublimation

2006

Copper phthalocyanine films have been deposited by glow-discharge-induced sublimation. The films have undergone postdeposition heat treatments in air at 250 and 290 °C for different times, ranging from 30 min to 14 h. The properties of as-deposited and heated films have been investigated by different techniques in order to determine the effects of heat treatments on the film properties. Fourier transform infrared analysis and UV−visible optical absorption analysis point out a gradual evolution of the film structure from a mixture of α and β polymorphs to the only β polymorph in the sample heated at 290 °C for 14 h. A pronounced decrease of carbon and nitrogen atomic percentages against an o…

Why the Cosmological Constant Seems to Hardly Care About Quantum Vacuum Fluctuations: Surprises From Background Independent Coarse Graining

2020

International audience; Background Independence is a sine qua non for every satisfactory theory of Quantum Gravity. In particular if one tries to establish a corresponding notion of Wilsonian renormalization, or coarse graining, it presents a major conceptual and technical difficulty usually. In this paper we adopt the approach of the gravitational Effective Average Action and demonstrate that generically coarse graining in Quantum Gravity and in standard field theories on a non-dynamical spacetime are profoundly different. By means of a concrete example, which in connection with the cosmological constant problem is also interesting in its own right, we show that the surprising and sometime…