Search results for "VARY"

showing 10 items of 682 documents

EXPERIMENTAL INVESTIGATIONS OF MINIMUM POWER CONSUMPTION OPTIMAL CONTROL FOR VARIABLE SPEED AMB ROTOR

2010

The purpose of this paper is to present a method for development of the optimal speed-dependent control matrix for a rotor supported on active magnetic bearings (AMBs) with the provision of minimum control power consumption over the operating speed range. The speed dependency of the optimal control matrix is the result of the dynamics of rotating machines. Most of published works on optimal control use a stationary optimal control matrix derived for the non-rotating system and thus neglecting the effect of gyroscopic phenomena. This paper employs the minimum energy consumption condition to derive the speed varying optimal control for rotating AMB rotor system. In the presented approach the …

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchineoptimal control active magnetic bearing speed varying
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Rateless Codes Performance Analysis in Correlated Channel Model for GEO Free Space Optics Downlinks

2012

Settore ING-INF/03 - TelecomunicazioniFree Space Optics (FSO) technologies for satellite communications offer several advantages: wide bandwidth high rate capability immunity to electromagnetic interference and small equipment size. Thus they are suitable for inter-satellite links deep space communications and also for high data rate ground-to-satellite/satellite-to-ground communications. Nevertheless FSO links suffer impairments that cause power signal degradation at the receiver. Scattering and absorption cause power signal attenuations predictable by suitable deterministic models. Optical turbulence causes random irradiance fluctuations which can generate signal fading events and can thereby only be predicted by statistical models. Attenuation and fading events can corrupt FSO links and so it would be recommended to add mitigation error codes on the communication link. FSO channel can be described as an erasure channel: fading events can cause erasure errors. We have identified in rateless codes (RCs) a suitable solution to be employed in FSO links. RCs do not need feedback and they add a redundant coding on the source data that allows the receiver to recover the whole payload despite erasure errors. We implemented two different of rateless codes: Luby Transform (LT) and Raptor. We analyzed their performances on a simulated turbulent GEO FSO downlink (1 Gbps - OOK modulation) at a 106 μm wavelength and for different values of zenith angles. Assuming a plane-wave propagation and employing Hufnagel-Valley we modeled the downlink using: 1) a temporal correlated channel model based on Gamma-Gamma probability distribution and 2) an irradiance covariance function that we converted on a time function using Taylor frozen eddies hypothesis. Our new channel model is able to simulate irradiance fluctuations at different turbulence conditions as it will be shown in the full paper. We will also report performance results of LT and Raptor codes at overhead range varying between 0 and 50% and for different values of source packets.Settore ING-INF/01 - Elettronica
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EXPRESSION OF METIOLLOPROTEINASES ( MMP2-MMP9 ) AND CYCLOOXIGENASES ( COX1-COX2 ) IN SALIVARY GLAND TUMORS

2011

Background Salivary neoplasms of the major salivary glands are uncommon: the annual incidence rates in the world vary between greater than 0.05 and less than 2 per 100,000. Most salivary gland tumours are benign and they represent an histological heterogeneous group with the greatest diversity of morphological and cellular features, in fact, these tumours are characterized by an extremely varied histomorphological phenotype due to combinations of different epitheliomorphic and mesenchymomorphic features. The histogenesis is uncertain but the bicellular theory of origin has been accepted and states that malignant transformation of reserve cell from either the intercalated or excretory duct a…

Settore MED/06 - Oncologia MedicaMETIOLLOPROTEINASESSALIVARY GLANDCYCLOOXIGENASESTUMORS
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Consensus On Women'S Health Aspects Of Polycystic Ovary Syndrome (Pcos)

2012

Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in females with a high prevalence. The etiology of this heterogeneous condition remains obscure and its phenotype expression varies. Two, widely cited, previous ESHRE/ASRM-sponsored PCOS consensus workshops focused on diagnosis (published in 2004) and infertility management (published in 2008). The present third PCOS consensus paper summarizes current knowledge and identifies knowledge gaps regarding various women's health aspects of PCOS. Relevant topics addressed-all dealt with in a systematic fashion-include adolescence, hirsutism and acne, contraception, menstrual cycle abnormalities, quality of life, ethnicity, preg…

Settore MED/09 - Medicina InternaConsensus Development Conferences as TopicmenopauseType 2 diabetesSettore MED/13 - EndocrinologiaQuality of lifecancer; cardiovascular disease; contraception; hirsutism; insulin resistance; menopause; PCOS; pregnancy; quality of life; type 2 diabetescardiovascular diseaseNeoplasmsinsulin resistancePCOShirsutismhirsutismReproductive BiologyPolycystic ovary syndrome (PCOS)RehabilitationObstetrics and GynecologyObstetrics & GynecologyMiddle AgedMenopausePhenotypecontraceptionCardiovascular DiseasesPCOS Cardiovascular risk adolescence cancer obesityFemalepregnancytype 2 diabetesPolycystic Ovary SyndromeAdultmedicine.medical_specialtyConsensusAdolescentDiabetes ComplicationsInsulin resistanceSDG 3 - Good Health and Well-beingmedicineHumanscancerMenstrual CycleAgedGynecologyPregnancybusiness.industryCancermedicine.diseaseSettore MED/40 - Ginecologia E OstetriciaReproductive MedicineDiabetes Mellitus Type 2quality of lifeWomen's Healthbusiness
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Salivary gland tumors in patients with necrotizing sialometaplasia: a case series

2013

Settore MED/28 - Malattie OdontostomatologicheSalivary gland tumours necrotizing sialometaplasia
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Sialoendoscopy in the management of the salivary gland disorders

2016

BACKGROUND: The aim of this study was to determine the long-term (> 6 month) outcome of patients suffering from obstructive sialadenitis treated by sialoendoscopy. METHODS: Between 2009 and 2013 seventy-six subjects underwent sialoendoscopy under local anesthesia at the University Hospital P. Giaccone of Palermo. RESULTS: The mean age of presentation was 50.5 years for male (56.6%) and 44.7 years for female (43.4%). The presenting symptoms were frequent pain in 72% of cases, frequent purulent secretions in 65% of cases, frequent swelling in 62% of cases and frequent bitter taste in 44% of cases. Affected glands were in 54 cases the submandibular unilaterally, in 21 cases the parotid unilate…

SialadenitiOtorhinolaryngology2734 Pathology and Forensic MedicineEndoscopy; Salivary gland calculi; Sialadenitis; Otorhinolaryngology2734 Pathology and Forensic MedicineSalivary gland calculiEndoscopy
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Case report of necrotizing sialometaplasia

2010

Introduction: Necrotizing sialometaplasia is a rare inflammatory necrotizing reactive process that can involve minor and major salivary glands. Gland tissue ischaemia has been proposed as the aetiology. Case Report: A 21-year-old woman was referred with a 1-week history of bilateral painful swelling of the palate, with the development of two deep ulcers after the first 3 days. Ulcer edges were elevated but not indurated, and the bases had a necrotic appearance. An incisional biopsy of the margin of one ulcer confirmed the diagnosis of necrotizing sialometaplasia. The ulcers spontaneously healed within 8 weeks without treatment. Discussion: The clinical and histological similarity between th…

Sialometaplasia Necrotizingmedicine.medical_specialtyIncisional biopsyNecrotizing sialometaplasiabusiness.industryBenign lesion:CIENCIAS MÉDICAS [UNESCO]medicine.diseaseSurgeryYoung AdultOtorhinolaryngologyMajor Salivary GlandUNESCO::CIENCIAS MÉDICASEtiologyHumansMedicineFemaleSurgerybusinessGeneral Dentistry
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Practical formula for the evaluation of high-order multiphoton absorption in thin nonlinear media

2009

We present an analytical formula for the fast and accurate evaluation of nonlinear absorption in materials exhibiting an admixture of different multiphoton processes. This approach is specifically addressed for its use in thin films when the slowly varying envelope approximation applies. The contribution of absorptions of distinct order is conveniently averaged in order to use well-known expressions for a single multiphoton process. In the latter case, therefore, our simple expression is reduced toward the exact solution.

Slowly varying envelope approximationMaterials sciencebusiness.industryNonlinear opticsAtomic and Molecular Physics and OpticsExpression (mathematics)Computational physicsNonlinear systemOpticsExact solutions in general relativitySimple (abstract algebra)Thin filmbusinessAbsorption (electromagnetic radiation)Journal of Modern Optics
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Effect of starvation on haemolymph vitellogenins and ovary uptake in Spilostethus pandurus

1993

Abstract 1. 1. Starvation reduces haemolymph vitellogenins and their incorporation by developing oocytes in S. pandurus adult females. 2. 2. Access to food restores unspecifically the protein levels in both haemolymph and ovaries. 3. 3. Topical treatments with JH promote de novo specific synthesis of vitellogenins and incorporation by the ovaries. 4. 4. These results point to a strong role of the JH as the regulatory factor of both reproductive phenomena in S. pandurus .

Starvationmedicine.medical_specialtyanimal structuresbiologyPhysiologyOvaryGeneral Medicinebiology.organism_classificationBiochemistrychemistry.chemical_compoundVitellogeninEndocrinologymedicine.anatomical_structureBiosynthesischemistrySpilostethus pandurusInternal medicineHemolymphmedicinebiology.proteinmedicine.symptomMolecular BiologyVitellogeninsComparative Biochemistry and Physiology Part B: Comparative Biochemistry
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The Psychological Science Accelerator’s COVID-19 rapid-response dataset

2023

Funder: Amazon Web Services (AWS) Imagine Grant

Statistics and Probability223 participants with varying completion rates. Participants completed the survey from 111 geopolitical regions in 44 unique languages/dialects. The anonymized dataset described here is provided in both raw and processed formats to facilitate re-use and further analyses. The dataset offers secondary analytic opportunities to explore copingBF Psychology230 Affective NeuroscienceHealth Behaviorand demographic information for each participant. Each participant started the study with the same general questions and then was randomized to complete either one longer experiment or two shorter experiments. Data were provided by 73Message framingDiseasesLibrary and Information Sciences:Ciências Sociais::Psicologia [Domínio/Área Científica]geographical and cultural context characterizationHV Social pathology. Social and public welfare. CriminologypandemiatEducationa general questionnaire examining health prevention behaviors and COVID-19 experienceddc:150SDG 3 - Good Health and Well-beingRA0421 Public health. Hygiene. Preventive MedicineSurveys and QuestionnairesAdaptation PsychologicalyleiskartoituksetHumansPendienteHealth behaviorsPandemicsframingBehaviour Change and Well-beingEmotion regulationSelf-determination messagingand self-determination across a diverseCOVID-19kansainvälinen vertailuResearch dataComputer Science Applicationswhich can be merged with other time-sampled or geographic data.cognitive reappraisalsglobal sample obtained at the onset of the COVID-19 pandemicterveyskäyttäytyminenIn response to the COVID-19 pandemic/dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_beingand autonomy framing manipulations on behavioral intentions and affective measures. The data collected (April to October 2020) included specific measures for each experimental studyStatistics Probability and UncertaintyPeople’s healthtutkimusaineistosurvey-tutkimusDatasetInformation Systemsthe Psychological Science Accelerator coordinated three large-scale psychological studies to examine the effects of loss-gain framing
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