Search results for " indoor"

showing 10 items of 99 documents

Indoor air problems and the perceived social climate in schools: A multilevel structural equation analysis

2018

Indoor air problems in schools appear to influence learning outcomes and absence rates. However, previous research has not investigated whether indoor air problems influence the social climate of schools. Therefore, we studied whether indoor air problems observed in schools associate with students' perceptions of the teacher-student relationship and class spirit. The nationwide sample of Finnish schools (N = 194 schools/27153 students) was analyzed using multilevel structural equation modeling. Data on the schools' social climate collected from students were merged with independently collected data on observed indoor air problems from school principals. We found that the teacher-student rel…

Maleteacher-student relationshipClimateApplied psychologyindoor airsocial relations010501 environmental sciences01 natural sciencesalakoulusocial climateIndoor air qualitySurveys and QuestionnairesMuut yhteiskuntatieteet - Other social sciencesComputingMilieux_COMPUTERSANDEDUCATIONWaste Management and Disposalta515FinlandSchools4. Education05 social sciencesMultilevel modelpsyykkiset vaikutukset050301 educationta3142ilmapiiriair qualityPollution3142 Public health care science environmental and occupational healthsosiaaliset suhteetindoor air problemsilmanlaatukoulurakennuksetAir Pollution Indoorclass spiritFemalemultilevel analysisPsychologysosiaaliset vaikutuksetindoor air qualityEnvironmental EngineeringAdolescentKansanterveystiede ympäristö ja työterveys - Public health care science environmental and occupational healthIndoor airmonitasomallinnusschooleducationSample (statistics)psykososiaaliset tekijätAffect (psychology)Structural equation modelingsisäilmaongelmatHumansLearningEnvironmental Chemistrylower secondary schoolStudentsopettaja-oppilassuhde0105 earth and related environmental sciencessisäilmapsychosocial effectPublic OpinionkouluPerception0503 educationScience of The Total Environment
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An Experimental Investigation on the Air Permeability of Passive Ventilation Grilles

2015

Abstract The need of increasing both energy saving and acoustic insulation has leaded to the design of lowest air permeability frames resulting in the worsening of indoor air quality. Moreover, sometime in several civil-use existing buildings (i.e. schools or houses, historical buildings) mechanical ventilation systems cannot be installed due to non-removable constraints. In these cases, passive ventilation grilles are a cheap and effective solution for the ventilation. This work deals with an in-depth experimental analysis about the air permeability values measured over a set of passive ventilation grilles available on the market. Obtained results often showed performances very far to thos…

Mechanical ventilationEngineeringbusiness.industrymedicine.medical_treatmentventilation grilleEnvironmental engineeringEnergy recovery ventilationNatural ventilationEffective solutionEnergy (all)Indoor air qualityEnergy(all)energy savingAir permeability specific surfacePassive ventilationEnergy saving; Indoor air quality; Ventilation grilles; Energy (all)medicineventilation grillesDuct (flow)Energy saving; Indoor air quality; Ventilation grillesbusinessindoor air qualityMarine engineeringEnergy Procedia
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Visually low-impacting methods for the measurement of parameters related to IAQ risk indicators in exhibition halls

2021

Microclimate for cultural heritage plays a fundamental role in the degradation process of artefacts exhibited in museums. Generally, the Indoor Air Quality (IAQ) monitoring inside museums is based on conventional measurements of thermo-hygrometry parameters and longtime averaged measurements of atmospheric pollutants’ concentration. Unfortunately, all these approaches require electric supply and are usually characterized by a noticeable visual impact on the exhibition space, which clearly negatively affects the visitors’ experience. This paper intends to revisit and discuss a methodology (and its test application on field, to estimate the risk of damage of three artefacts displayed in an ol…

Museums indoor air quality off-line sensors low visual impact corrosion risk artefact preservation visitors ‘comfort
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Relationship between domestic smoking and metals and rare earth elements concentration in indoor PM2.5

2018

Cigarette smoke is the main source of indoor chemical and toxic elements. Cadmium (Cd), Thallium (Tl), Lead (Pb) and Antimony (Sb) are important contributors to smoke-related health risks. Data on the association between Rare Earth Elements (REE) Cerium (Ce) and Lanthanum (La) and domestic smoking are scanty. To evaluate the relationship between cigarette smoke, indoor levels of PM2.5 and heavy metals, 73 children were investigated by parental questionnaire and skin prick tests. The houses of residence of 41 "cases" and 32 "controls" (children with and without respiratory symptoms, respectively) were evaluated by 48-hours PM2.5 indoor/outdoor monitoring. PM2.5 mass concentration was determi…

PM010504 meteorology & atmospheric sciencesPM2.5; indoor; cigarette smoke; heavy metals; Rare Earth Elements; respiratory healthRare earthchemistry.chemical_elementPM2.5010501 environmental sciencescomplex mixtures01 natural sciencesBiochemistrycigarette smoke; heavy metals; indoor; PM2.5; rare earth elements; respiratory healthSettore MED/38 - Pediatria Generale E SpecialisticaRare earth elementLanthanumCigarette smokeIndoorRare earth elementsRespiratory health0105 earth and related environmental sciencesGeneral Environmental ScienceCadmiumSettore ING-IND/11 - Fisica Tecnica AmbientaleRespiratory healthCigarette smokeHeavy metalsHeavy metalHeavy metalschemistry2.5Environmental chemistryThalliumRespiratory health.Environmental Research
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PARAMETRI STRUTTURALI DI SITI SPORTIVI INDOOR E RISCHIO RADON. RISULTATI PRELIMIARI DI UN'INDAGINE NELLE PALESTRE A PALERMO.

2008

Palestre indoor PalermoSettore MED/42 - Igiene Generale E Applicata
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Moderate-to-Strong Turbulence Generation in a Laboratory Indoor Free Space Optics Link and Error Mitigation via RaptorQ Codes

2016

Free Space Optics (FSO) is rapidly gaining interest as a line-of sight communication technology that offers capabilities similar - in terms of bandwidth and transfer rates - to optical fibre, also possessing several advantages compared with traditional radio frequency links. However, FSO link quality can be strongly affected by unfavourable weather conditions and also by the phenomenon of optical turbulence, even in clear sky. In this work, we have implemented an indoor FSO link and generated moderate-to-strong turbulence conditions along the optical path by using heaters and a mechanical ventilation system. In this way, we have been able to investigate the effects of the generated turbulen…

Physicsbusiness.industryNetwork packetFree Space Optics (FSO) indoor link turbulence generation packet loss rateless codes RaptorQ codesSettore ING-INF/03 - Telecomunicazioni05 social sciencesBandwidth (signal processing)050801 communication & media studies020206 networking & telecommunicationsSettore ING-INF/02 - Campi Elettromagnetici02 engineering and technologySettore ING-INF/01 - ElettronicaData recovery0508 media and communicationsOptical path0202 electrical engineering electronic engineering information engineeringBit error rateElectronic engineeringRadio frequencybusinessAdaptive opticsFree-space optical communication
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Integration of WiFi ToF Positioning System in the Open, Flexible and Adaptive WiSHFUL Architecture

2017

We integrate a prototypeWiFi Time-of-Flight (ToF) ranging and positioning system in the WiSHFUL software platforms and hardware radios for experimental prototyping. Users have access to ToF measurements as well as computed positions through unified programming interfaces that make possible to investigate innovative positioning and networking solutions. TRUE pub

Positioning systembusiness.industryComputer scienceSettore ING-INF/03 - TelecomunicazioniTime of flight indoor positioning network control radio control020206 networking & telecommunications020302 automobile design & engineeringRanging02 engineering and technologySoftware0203 mechanical engineeringEmbedded system0202 electrical engineering electronic engineering information engineeringArchitecturebusiness
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Indoor air pollutants stimulate interleukin-8-specific mRNA expression and protein secretion of alveolar macrophages.

1998

Indoor air pollutants may cause inflammatory changes of the airways and adjacent pulmonary tissue. After phagocytosis of inhaled particles alveolar macrophages (AM) release chemotactic mediators capable of attracting inflammatory cells into the lung tissue. To evaluate these mechanisms further peripheral blood mononuclear cells (PBMNC) and human AM (freshly recovered from the lower respiratory tract) were exposed to the indoor particles Soot FR 101 and Printex 90, the asbestos fiber Chrysotile B, and titanium dioxide (TiO2) at concentrations of 10 or 50 microg/10(6) cells for up to 8 h. The migration of granulocytes into the conditioned supernatants of AM and PBMNC was quantified by chemota…

Pulmonary and Respiratory MedicineGranulocyte migrationAdultMaleChemokineBiologyGranulocytePeripheral blood mononuclear cellPolymerase Chain ReactionMicrobiologyMacrophages AlveolarmedicineHumansInterleukin 8RNA MessengerAgedAir PollutantsLungInterleukin-8InterleukinMolecular biologyChemotaxis Leukocytemedicine.anatomical_structureAir Pollution Indoorbiology.proteinLeukocytes MononuclearFemaleBronchoalveolar Lavage FluidChemotaxis assayLung
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Third-hand smoke exposure and health hazards in children

2013

Smoking still represents a huge public health problem. Millions of children suffer the detrimental effects of passive smoking. An increasing number of countries have recently issued laws to regulate smoking in public places. Instead, homes remain a site where children are dangerously exposed to environmental tobacco smoke (ETS). The combination of tobacco smoke pollutants which remain in an indoor environment, the so-called ‘third-hand smoke’ (THS), represent a new concept in the field of tobacco control. THS consists of pollutants that remain on surfaces and in dust after tobacco has been smoked, are re-emitted into the gas-phase, or react with other compounds in the environment to form se…

Pulmonary and Respiratory Medicinemedicine.medical_specialtyPassive smokinglcsh:MedicineSettore MED/10 - Malattie Dell'Apparato Respiratoriomedicine.disease_causeTobacco smokeHazardous SubstancesThird-hand smokeSettore MED/38 - Pediatria Generale E SpecialisticaEnvironmental tobacco smokeEnvironmental healthmedicineHumansEnvironmental tobacco smoke Children Lung development Asthma Tobacco control Indoor environment Third-hand smoke.Active smokingThird-hand smokeChildChildrenSmokebusiness.industryPublic healthTobacco controllcsh:RIndoor environmentThird-hand smoke.AsthmaHuman exposureLung developmentTobacco Smoke PollutionTobacco controlCardiology and Cardiovascular Medicinebusiness
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INQUINAMENTO INDOOR DA RADON. UNA APPLICAZIONE DELLE RETI BAYESIANE A SUPPORTO DELLA DIAGNOSI

2010

Nel quadro più generale della tematica del controllo della qualità ambientale e più in particolare dell’Indoor Air Quality, la presente relazione riporta lo studio di un fenomeno di inquinamento da radon riguardante la scuola “G. Mancino” di Palermo. Lo spunto viene offerto dal fatto che nel 2005, nel corso di un monitoraggio della radioattività ambientale di Palermo, i tecnici dell’ARPA Sicilia hanno rilevato in questa scuola elementare degli anni ’30, livelli di radon indoor molto superiori ai limiti di legge fissati dal D.Lgs. 241/2000. Nella prima fase, dopo lo studio delle caratteristiche tipologiche e costruttive del plesso e l’acquisizione dei dati di misura pregressi, si è proceduto…

Qualità Indoor Air Quality Radon Analisi Meccanismi inquinamento Reti BayesianeSettore ICAR/11 - Produzione Edilizia
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