Search results for "Measured [formula omitted]"

showing 6 items of 26 documents

Unobserved tourism

2015

Having more reliable statistics is essential for policy-makers to be able to make effective decisions. Nevertheless, measuring the number of tourists in a given destination is not an easy task. After reviewing the main problems affecting official statistics on tourism, this paper proposes a general framework by formalizing a theoretical model in which tourism nights and trips in a given destination are broken down into observed and unobserved components, according to the European system of tourism statistics. The main approaches related to the measurement of unobserved tourism are discussed, and some empirical findings in Sicily (Italy) are presented in order to highlight the actual magnitu…

Tourism Leisure and Hospitality ManagementSampling touristAccommodation statisticDestination managementSettore SECS-S/05 - Statistica SocialeDevelopmentTravel statisticUnmeasured tourismSicily
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Occurrence of selected antibiotics and antiretroviral drugs in Nairobi River Basin, Kenya.

2015

In this paper, we investigated the occurrence of three antibiotics (sulfamethoxazole, trimethoprim and ciprofloxacin) and three antiretroviral (lamivudine, nevirapine and zidovudine) drugs in the Nairobi River Basin, Kenya. The analytical procedure involved extraction using solid phase extraction followed by liquid chromatography-electrospray ionization tandem mass spectrometry (SPE-LC-ESI-MS/MS). In this study, 40 sites were selected for sampling, including 38 sites along the rivers and 2 wastewater treatment effluent sites. All the studied compounds were detected with sulfamethoxazole having the highest detection frequency of 97.5% and ciprofloxacin had the lowest at 60%. The results show…

Veterinary medicineSpectrometry Mass Electrospray IonizationEnvironmental EngineeringNevirapine010504 meteorology & atmospheric sciencesta1172antiretroviral010501 environmental sciencesBiologyoccurrence01 natural sciencesRisk AssessmentantibioticsRiverspredicted no effect concentrationmedicineEnvironmental ChemistryAnimalsPredicted no-effect concentrationWaste Management and DisposalEffluent0105 earth and related environmental sciencesSulfamethoxazoleSolid Phase ExtractionFishesLamivudinePollutionTrimethoprimKenyaAnti-Bacterial AgentsCiprofloxacinWastewaterAnti-Retroviral AgentsDaphniaEnvironmental chemistrymeasured environmental concentrationWater Pollutants Chemicalrisk quotientmedicine.drugEnvironmental MonitoringThe Science of the total environment
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Teichmuller Space and Related Topics : Proceedings of the workshop on Geometry, January 20, 2011, JOSAI UNIVERSITY

2012

The theory of geometric structures on a surface with nonempty boundary can be developed by using a decomposit,ion of such a surface into hexagons, in the same way as the theory of geometric structures on a surface without boundary is developed using the decomposition of such a surface into pairs of pants. The basic elements of the theory for surfaces with boundary include the study of measured foliations and of hyperbolic structures on hexagons. It turns out that there is an interesting space of measured foliations on a hexagon, which is equipped with a piecewise-Iinear structure (in fact, a natural cell-decomposition), and this space is a natural boundary for the space of hyperbolic struct…

[ MATH.MATH-GT ] Mathematics [math]/Geometric Topology [math.GT]Mathematics - Geometric Topologyhyperbolic structureTeichmüller spaceTeichmuller space32G15 ; 30F30 ; 30F60[MATH.MATH-GT]Mathematics [math]/Geometric Topology [math.GT]FOS: MathematicsGeometric Topology (math.GT)measured foliationhexagon[MATH.MATH-GT] Mathematics [math]/Geometric Topology [math.GT]
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Anterior chamber depth measurement in teenagers. Comparison of two techniques

2013

Purpose: The aim of this study is to determine the anterior chamber depth (ACD) in teenagers using two different devices: partial coherence interferometry IOLMaster (Carl Zeiss Meditec) and anterior segment optical coherence tomography (Visante TM OCT, Carl Zeiss Meditec) and to evaluate the degree of agreement between ACD measurements carried out by both instruments. Methods: In this prospective study 68 eyes of 34 emmetropic Caucasic patients (18 girls and 16 boys) were analysed. ACD was measured from the anterior corneal surface to anterior surface of the crystalline lens. For each age the ACD size was calculated and the difference between IOLMaster and Visante-OCT measurements was analy…

medicine.medical_specialtygenetic structuresmedicine.medical_treatmentEmmetropiaIntraocular lensAnterior surfaceTeenagerslcsh:OphthalmologyOptical coherence tomographyOphthalmologymedicinelcsh:QC350-467Cámara anteriorCorneal surfaceAdolescentesAnterior chamberEmmetropic Caucasic patientsmedicine.diagnostic_testbusiness.industryPacientes caucásicos emetrópicoseye diseasesPruebas diagnósticas/investigaciónlcsh:RE1-994Partial coherence interferometryMeasured depthOptometryOriginal Articlesense organsDiagnostic tests/investigationbusinesslcsh:Optics. LightOptometryJournal of Optometry
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Research in reduction of meters under registration: experience and results achieved in field tests and in laboratory in Palermo

2010

private storage tankApparent losseunmeasured flow reducer
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Jet fragmentation transverse momentum distributions in pp and p-Pb collisions at √s, √sNN = 5.02 TeV

2021

Jet fragmentation transverse momentum (jT) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at √sNN = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm with resolution parameter R = 0.4 in the pseudorapidity range |η| < 0.25. The jT values are calculated for charged particles inside a fixed cone with a radius R = 0.4 around the reconstructed jet axis. The measured jT distributions are compared with a variety of parton-shower models. Herwig and Pythia 8 based models describe the data well for the higher jT region, while they underestimate the low…

related to the perturbative component of the fragmentation processthe measured trends are successfully described by all models except for Herwig. For the wide componentHerwig and PYTHIA 8 based models slightly underestimate the data for the higher jet transverse momentum region. These measurements set constraints on models of jet fragmentation and hadronisation.Nuclear and High Energy Physicswhile that of the inverse gamma function increases with increasing jet transverse momentum. For the narrow componentHeavy Ion Experimentsand with a Gaussian for lower jT values (called the “narrow component”)hiukkasfysiikkawhile they underestimate the lower jT region. The jT distributions are further characterised by fitting them with a function composed of an inverse gamma function for higher jT values (called the “wide component”)predominantly connected to the hadronisation process. The width of the Gaussian has only a weak dependence on jet transverse momentumJet fragmentation transverse momentum (jT) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at √sNN = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm with resolution parameter R = 0.4 in the pseudorapidity range |η| < 0.25. The jT values are calculated for charged particles inside a fixed cone with a radius R = 0.4 around the reconstructed jet axis. The measured jT distributions are compared with a variety of parton-shower models. Herwig and PYTHIA 8 based models describe the data well for the higher jT region
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