Search results for " artifacts"

showing 10 items of 31 documents

The formation of alluvial fans and young floodplain deposits in the Lieser catchment, Eifel Mountains, western German Uplands: A study of soil erosio…

2011

This study deals with the exploration and spatiotemporal quantification of the young Holocene, nearly skeleton-free floodplain sediments of the Lieser River, a tributary of the Mosel River in the Eifel Mts. The deposits are primarily a consequence of anthropogenic-triggered soil erosion in the catchment. To observe the phenomenon of corresponding soil erosion on multiple levels two small alluvial fans of tributary catchments were investigated. For comparison, one location in the neighboring Salm valley was described. The results were compared with those of other streams. With extensive fieldwork more than 100 drillings and pits were made at 12 locations. For dating the sediments OSL dating…

HydrologyArcheologyGlobal and Planetary Changegeographygeography.geographical_feature_categoryEcologyFloodplainAlluvial fanDrainage basinPaleontologySTREAMSArchaeological artifactsTributaryOverbankHoloceneGeologyEarth-Surface ProcessesThe Holocene

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Short-term occupations at high elevation during the Middle Paleolithic at Kalavan 2 (Republic of Armenia).

2021

The Armenian highlands encompasses rugged and environmentally diverse landscapes and is characterized by a mosaic of distinct ecological niches and large temperature gradients. Strong seasonal fluctuations in resource availability along topographic gradients likely prompted Pleistocene hominin groups to adapt by adjusting their mobility strategies. However, the role that elevated landscapes played in hunter-gatherer settlement systems during the Late Pleistocene (Middle Palaeolithic [MP]) remains poorly understood. At 1640 m above sea level, the MP site of Kalavan 2 (Armenia) is ideally positioned for testing hypotheses involving elevation-dependent seasonal mobility and subsistence strateg…

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Impact of intravascular enhancement, heart rate, and calcium score on diagnostic accuracy in multislice computed tomography coronary angiography.

2005

PURPOSE: To assess the effect of intravascular enhancement, heart rate, and calcium score on diagnostic accuracy in the detection of significant coronary artery stenosis using 16-row multislice computed tomography (MSCT). MATERIALS AND METHODS: One hundred patients (88 males; 59+/-11 years) with suspected coronary artery disease who had undergone conventional coronary angiography (CA) and MSCT-CA were retrospectively enrolled for the study. Patients underwent a MSCT-CA, with the following protocol: collimation 16x0.75 mm, gantry rotation time 420 ms, feed/rotation 2.8 mm, kV 120, mAs 400-500. The protocol for contrast material administration was 100 ml of Iodixanol 320 mgI/ml at 4 ml/s and …

MaleStatistical Female *Heart Rate Humans Male Middle Aged Retrospective Studies Sensitivity and Specificity TomographyContrast MediaCoronary DiseaseCoronary Artery DiseaseCoronary AngiographySensitivity and SpecificityHeart RateTriiodobenzoic AcidsHumanscoronary artery stenosisAgedRetrospective StudiesBody WeightCoronary StenosisCalcinosisMiddle AgedAged Artifacts Body Weight Calcinosis/*radiography Contrast Media Coronary Angiography/*methods Coronary Artery Disease/radiography Coronary Disease/*radiography Coronary Stenosis/radiography Data Interpretation; Statistical Female *Heart Rate Humans Male Middle Aged Retrospective Studies Sensitivity and Specificity Tomography; X-Ray Computed/*methods Triiodobenzoic Acids/administration & dosage/diagnostic useX-Ray Computed/*methods Triiodobenzoic Acids/administration & dosage/diagnostic useData Interpretation StatisticalAged Artifacts Body Weight Calcinosis/*radiography Contrast Media Coronary Angiography/*methods Coronary Artery Disease/radiography Coronary Disease/*radiography Coronary Stenosis/radiography Data InterpretationFemalemultislice computed tomography (MSCT)ArtifactsTomography X-Ray Computedcoronary artery stenosis; multislice computed tomography (MSCT)

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A human post-mortem brain model for the standardization of multi-centre MRI studies

2015

Multi-centre MRI studies of the brain are essential for enrolling large and diverse patient cohorts, as required for the investigation of heterogeneous neurological and psychiatric diseases. However, the multi-site comparison of standard MRI data sets that are weighted with respect to tissue parameters such as the relaxation times (T1, T2) and proton density (PD) may be problematic, as signal intensities and image contrasts depend on site-specific details such as the sequences used, imaging parameters, and sensitivity profiles of the radiofrequency (RF) coils. Water or gel phantoms are frequently used for long-term and/or inter-site quality assessment. However, these phantoms hardly mimic t…

Models Anatomicmedicine.medical_specialtyNeurologyCognitive NeuroscienceModels NeurologicalMulti-centre MRI studies; Post-mortem brain; Quantitative MRI; Standardization; Aged; Artifacts; Brain; Female; Humans; Magnetic Resonance Imaging; Multicenter Studies as Topic; Phantoms Imaging; Reproducibility of Results; Models Anatomic; Models Neurological; Postmortem Changes; Cognitive Neuroscience; Neurology; Medicine (all)Cognitive neuroscienceImaging phantomPhantomsImagingWhite matterModelsPost-mortem brainmedicineHumansMulticenter Studies as TopicMagnetization transferMulti-centre MRI studiesAgedmedicine.diagnostic_testbusiness.industryPhantoms ImagingMedicine (all)AnatomicBrainReproducibility of ResultsMagnetic resonance imagingHuman brainQuantitative MRIMagnetic Resonance ImagingStandardizationmedicine.anatomical_structureNeurologyPostmortem ChangesNeurologicalFemaleBrainstemNuclear medicinebusinessArtifacts

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Photoplethysmograhic sensors, potential and limitations: Is it time for regulation? A comprehensive review

2023

Healthcare is expected to increasingly shift care out of inpatient settings thanks to wearable monitoring systems. Photoplethysmography (PPG) is an optical technique already integrated into wrist-worn commercial products which presents significant advantages in terms of cost and dimensions. PPG-based devices, despite their ability to detect multiple cardiovascular parameters, are affected by several influencing conditions that depend both on technological or environmental variables, and on intra- and inter-subject variability that influences the whole measurement chain and reliability, hindering an objective characterization of PPG devices. Plus, the lack of standardization for data collect…

Photoplethysmography (PPG)Optical sensorsHeart Rate (HR)Sources of inaccuracyMotion artifactsStandardization

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Fast multi-directional DSLM for confocal detection without striping artifacts

2020

In recent years light-sheet fluorescence microscopy (LSFM) has become a cornerstone technology for neuroscience, improving the quality and capabilities of 3D imaging. By selectively illuminating a single plane, it provides intrinsic optical sectioning and fast image recording, while minimizing out of focus fluorescence background, sample photo-damage and photo-bleaching. However, images acquired with LSFM are often affected by light absorption or scattering effects, leading to un-even illumination and striping artifacts. In this work we present an optical solution to this problem, via fast multi-directional illumination of the sample, based on an acousto-optical deflector (AOD). We demonstr…

Point spread functionMaterials scienceOptical sectioningImage qualitymedia_common.quotation_subjectConfocalconfocal detection01 natural sciencesLight scatteringArticlelaw.invention010309 optics03 medical and health sciences0302 clinical medicineOpticslaw0103 physical sciencesFluorescence microscopeContrast (vision)media_common030304 developmental biology0303 health sciencesbusiness.industryLaserSample (graphics)Atomic and Molecular Physics and Opticsstriping artifactsdigital scanned laser light-sheet fluorescence microscopy (DSLM)light sheet stripingFocus (optics)business030217 neurology & neurosurgeryBiotechnology

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Sine cura. Verso il ri-ciclo dell'architettura del secondo Novecento

2019

Gli argomenti discussi nel saggio interrogano il destino che il Codice dei Beni Culturali (2004- 2011) determina per le opere del secondo Novecento. Nella costruzione del futuro di questi manufatti, che per funzione, tecnologia e cicli d’uso sono spesso segnati dall’obsolescenza e dall’abbandono, le ambiguità e le incongruenze delle attuali procedure legislative sollecitano profondamente il ruolo culturale delle esperienze di ricerca che usano metodologie meta progettuali. Il confronto fra alcuni casi italiani ed altri europei rimarca il ruolo del progetto nella costruzione di una prospettiva di tutela trasformativa per il costruito del secondo Novecento. Nel quadro di azione marcato dall’o…

Settore ICAR/14 - Composizione Architettonica E UrbanaThe essay questions the future's possibilities to operate on the buildings of the second half of the twentieth century according to the Italian Code of Cultural Heritage (2004-2011). When arguing how to encourage the re-use of these artifacts which are often marked by short-life technology cycles obsolescence and abandonment the ambiguities and inconsistencies of current legislative procedures deeply stress the cultural role of research experiences that use project-oriented methodologies. The comparison between some Italian and other European cases highlights the role of a design approach in the construction of a transformative protection perspective for the built matter of the second half of the twentieth century. In a framework aiming to encourage a reconciliation between the recent built environment and the new paradigms of sustainability and circular economy architecture must recognize re-cycle practices as a main theoretical and procedural node. To modernize the late Modern built environment with contemporary construction components is not simply a matter of technical knowledge and expertise: but a theme with theoretical density aesthetic and ethical values. The architectural project in this field today must ask for greater congruence between the bureaucratic and administrative levels and the real consistency of this corpus. It is a matter of identifying strategies to equip it with capabilities meanings and contents remembering that demolition wastes have unsustainable environmental costs and uncertain results concerning the necessary new attribution of political and semantic meaning that these places await.

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Mazzarino (CL), contrada Minnelli (sito 41)

2016

The contribution illustrates the site of Contrada Minnelli, in the territory of Mazzarino, which has returned a settlement intended for handicraft production, frequented between the 5th and 6th centuries AD, probably to be identified with the site of Macharina mentioned by the sources. Particular attention is paid to the artifacts of African production found (amphoras, lamps, fragments of sigillata).

Settore L-ANT/10 - Metodologie Della Ricerca ArcheologicaMazzarino Sicily African artifacts V-VI AD Macharina

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Santa Venera e la Pace: secoli di devozione, storia, cultura e società a Palermo

2021

Si tratta di un saggio introduttivo al volume sulla compagnia della Pace con le relative opere d'arte e d'architettura volute da committenza preclara siciliana per la sede palermitana dell'organismo. Il saggio tira le fila dei contributi presenti nel volume offrendo alcune ipotesi interpretative aggiuntive su alcuni manufatti artistici e definendo i contesti culturali di alcuni interventi e della relativa aristocratica committenza. This is an introductory essay to the volume on the company of Peace with the related works of art and architecture commissioned by Sicilian preclars for the Palermo headquarters of the organism. The essay pulls the strings of the contributions present in the volu…

Settore L-ART/04 - Museologia E Critica Artistica E Del Restauroworks of art and architectureartistic artifactsaristocratic clientarte architettura committenza aristocrazia manufatti

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Design e narrazioni

2022

Il testo nasce dall’esigenza di mettere a fuoco le implicazioni cognitive, metodologiche e progettuali del concetto di narrazione, sempre più ricorrente nella nostra esperienza quotidiana soprattutto per le molteplici forme di comunicazione e di produzioni culturali che vi si ispirano; si tratta di un concetto che anche nella riflessione teorica e nella progettualità del design sta alimentando dimensioni fortemente innovative ed evolutive nella costruzione, comunicazione di significati, contenuti immateriali, esperienze e valori emozionali che si sovrappongono e s’intrecciano all’espressione tangibile e funzionale degli oggetti, degli artefatti comunicativi, degli spazi. Si propone un perco…

The text arises from the need to focus on the cognitive methodological and design implications of the concept of storytelling increasingly recurrent in our daily experience especially for the many forms of communication and cultural productions that are inspired by itSettore ICAR/13 - Disegno Industrialeit is a concept that also in theoretical reflection and design planning is feeding strongly innovative and evolutionary dimensions in the construction communication of meanings intangible content experiences and emotional values that overlap and intertwine with the tangible and functional expression of objects communicative artifacts spaces.. It proposes a cognitive path tangent to the development of "narratology" and the theories of narrationthus we come across a multiplicity of disciplinary connections affecting sociology psychology anthropology philosophy semiotics and of course history cinema journalism advertising up to corporate communication and political propaganda. It is an articulated panorama that today seems to expand more and more and far from being mainly addressed to theoretical issues increasingly seems to be modeled on application performative and design aspects.

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