Search results for " EVALUATION"
showing 10 items of 1458 documents
Clinical evaluation of bond failures and survival between mandibular canine-to-canine retainers made of flexible spiral wire and fiber-reinforced com…
2013
Objectives: The purpose of this longitudinal prospective randomized study was to evaluate the clinical reliability of two different types of postorthodontic treatment retainers: a silanised-treated glass fibers-reinforced resin composite (FRC) and a directly bonded multistranded stainless steel wire. The hypothesis of the study was to assess if significant differences are present between failure rates of the two retainers. Study Design: This prospective study was based on an assessment of 87 patients (35 men and 52 women),with an average age of 24 years who required a lower arch fixed retainer after orthodontic treatment. Patients were divided in two groups. Assignment was carried out with …
Synthesis and biological evaluation of structural variants of carbazoquinocin C
2003
Some new structural variants of the alkaloid carbazoquinocin C were synthesized in a few steps with good to excellent yields. The key step comprises a cyclisation reaction of appropriate 2-vinylindoles with oxalyl chloride. The carbazole-3,4-quinones are able to trap oxygen-centred radicals. In some biological/biochemical assays some of these compounds exhibit extraordinary results including inhibition of cyclooxygenase-1 and 5-lipoxygenase in the μM-range. Moreover some of the carbazoquinocin C-variants inhibit significant oxidative damage of cellular DNA in nM-range.
Water Extract of Cryphaea heteromalla (Hedw.) D. Mohr Bryophyte as a Natural Powerful Source of Biologically Active Compounds
2019
Bryophytes comprise of the mosses, liverworts, and hornworts. Cryphaea heteromalla, (Hedw.) D. Mohr, is a non-vascular lower plant belonging to mosses group. To the date, the most chemically characterized species belong to the liverworts, while only 3.2% and 8.8% of the species belonging to the mosses and hornworts, respectively, have been investigated. In this work, we present Folin–Ciocalteu and oxygen radical absorbance capacity (ORAC) data related to crude extracts of C. heteromalla obtained by three di erent extraction solvents: pure water (WT), methanol:water (80:20 v/v) (MET), and ethanol:water (80:20 v/v) (ETH). The water extract proved to be the best solvent showing the highest con…
La distribuzione di Maxwell-Boltzmann: i risultati di una sperimentazione svolta nell'ambito dei corsi di laurea in ingegneria
2011
This paper describes the outcomes of an teaching experiment conducted in the seminar held at the Faculty Engineering of Palermo University. The theme of the seminar focused on undergraduate experiment that yields the velocity distribution of thermionic electrons by analyzing the I-V characteristics of diodes and triodes. By using a simple model, the velocity distribution of thermionic electrons emitted by the vacuum tube cathode can be described by Maxwell's distribution. The experiment allows students to focus on the distribution function more than on difficulties arising from the complexity of thermionic emission. Questo articolo descrive i risultati di una sperimentazione didattica condo…
Study of the Importance of Emotional Factors Connected to the Colors of Fresh-Cut Cactus Pear Fruits in Consumer Purchase Choices for a Marketing Pos…
2015
Cactus pear has always aroused curiosity because of its shape and its particular structural characteristics (plate and spiny clatodes, oval fruits of different colors and flowers of an enchanting beauty). This plant evocates the territory where it grows, characterized by a sub-tropical climate, which in Europe is represented by the region of Sicily (Southern Italy), that is one of the main producers of the Mediterranean area. Sicily has three native cultivars with different colors of the fruit: red, yellow and white. The variety with the yellow fruit is the most widespread, although all of them are commercialized. The chromatic variety of these fruits might be an important element of attrac…
A visual framework to create photorealistic retinal vessels for diagnosis purposes
2020
The methods developed in recent years for synthesising an ocular fundus can be been divided into two main categories. The first category of methods involves the development of an anatomical model of the eye, where artificial images are generated using appropriate parameters for modelling the vascular networks and fundus. The second type of method has been made possible by the development of deep learning techniques and improvements in the performance of hardware (especially graphics cards equipped with a large number of cores). The methodology proposed here to produce high-resolution synthetic fundus images is intended to be an alternative to the increasingly widespread use of generative ad…
Technical and economical comparison between different topologies of PV plant under mismatch effect
2014
This paper presents a technical and economical comparative analysis between two topology of photovoltaic plant. In particular the performances of series-parallel (SP) and total cross tied (TCT), topologies are taken into account, referring to a partially shaded photovoltaic plant. Thanks to a simulation model developed, in the paper the mismatch effects due to three different shading conditions, for SP and TCT topology plant, are quantified. Since the TCT solution, even though increase the energy production, raise the complexity of plants as well as their costs, an evaluation of the individual costs of each component of a SP and TCT plant topology, as PV modules, support structure, inverter…
An Appeal for Implementing Social Assistance and Welfare Programs for European Children Challenged by Parental Loss
2018
The authors of this commentary, many of whom are part of a working group on social pediatrics supported by some of the European national pediatric societies member of EPA-UNEPSA, conclude that more studies are needed to cross the boundaries between disciplines, for example, looking at the inter-relationship of family life and child health and how parental loss is affecting the micro and macro level of child healthcare service systems. Therefore, this article aims to alert pediatricians to the impact of parental loss on child health and wellbeing. It emphasizes the importance of implementing preventive and social support programs for achieving health promotion and health-protective effects.
Testing the participatory education evaluation concept in a national context
2012
Abstract The article focuses on the realisation of participatory evaluation (PE) in national educational evaluation activity. The realisation of PE is examined by adapting the Daigneault and Jacob model (2009 ; originally Cousins & Whitmore, 1998 ) to five national-level educational evaluations carried out in Finland. According to the chosen frame of reference, self-evaluation regarding the realisation of these five evaluations as well as the analysis of reports that are yielded from the evaluations is used as the research method. PE was realised at a general level in the Finnish national level educational evaluations, but during the process there were considerable differences between the s…
Clinical evaluation of melanomas and common nevi by spectral imaging
2012
A clinical trial on multi-spectral imaging of malignant and non-malignant skin pathologies comprising 17 melanomas and 65 pigmented common nevi was performed. Optical density data of skin pathologies were obtained in the spectral range 450-950 nm using the multispectral camera Nuance EX. An image parameter and maps capable of distinguishing melanoma from pigmented nevi were proposed. The diagnostic criterion is based on skin optical density differences at three fixed wavelengths: 540nm, 650nm and 950nm. The sensitivity and specificity of this method were estimated to be 94% and 89%, respectively. The proposed methodology and potential clinical applications are discussed.