Hao Zhu, Alfred Rieder, Wolfgang Drahm, Yaoying Lin, Andreas Guettler, Michael Wiesmann, Josef Hubensteiner
Entrained gas has been regarded as disturbance to measurements based on Coriolis meters, since measurement accuracy can be degraded because of this disturbance. Recent research from Endress+Hauser has discovered that different types of gas bubbles, namely free bubbles and suspended bubbles, have various impact on the meter measurement performance. It is crucial to identify the bubble pattern in the measuring tube of a Coriolis meter to make a diagnosis and reduce the negative influence of the disturbance accordingly. For free bubbles that typically cause inhomogeneity of a medium, the...
H. Bissig, M. Tschannen, M de Huu
Calibration of flow devices are important in several areas of pharmaceutical, flow chemistry and health care applications where volumetric dosage or delivery at given flow rates are crucial for the process. Although most of the flow devices are measuring flow rates of process-oriented liquids their calibrations are often performed with water as calibration liquid. It is recommended to perform the calibrations of the flow devices with processoriented liquids as the liquid itself might influence the performance of the flow devices. Therefore, METAS has developed facilities with METAS flow...
H. Bissig, M. Tschannen, M de Huu
Very low flow calibrations are important in several areas of pharmaceutical, microfluidic and health care applications where volumetric dosage or delivery at given flow rates are crucial for the process. Not only continuous flow rates are commonly used in the health sector, but also pulsed flow rates consisting of constant delivered volumes at given time intervals. One known application is the delivery of Insulin with tethered or patch pumps. These constant volumes can be of the order of several tens or hundreds of nanoliters. As the delivery times can vary up to several minutes, it is not...
Mengna Li, Heming Hu, Jing Zhang
Anthropogenic activities such as combustion of fossil fuel and changes in land use release carbon dioxide (CO2) into the atmosphere which impacts climate. Cities, with high energy consumption, are main emitters of CO2 .Therefore, acquiring the concentration and movement of CO2 in cities is the key to the mitigation of CO2 emission and the implementation of policies designed for climate change adaption. To quantify the CO2 emission from cities and investigate its contribution to the regional carbon budget, it is necessary to employ a multi-point observation method. The miniature...
Paola Fermo, Valeria Comite, Vittoria Guglielmi, Marco Schiavoni,Elisabetta Boanini, Elisa Monfasani, Roberto Bonomi, Valerio Pasini
The study here presented concerns the characterization, withchromatographic (high-performance liquid chromatography, HPLC) andspectroscopic (Raman spectroscopy and UV-Vis spectroscopy)techniques, of red dyestuffs used to dye the yarns of ancienttapestries. Following the ancient recipes the yarns (wool andsilk) have been dyed using natural red dyes such as madder, kermesand cochineal. By SEM-EDX (scanning electron microscopy coupledwith energy dispersive X-ray analysis) the yarns morphology hasbeen investigated and the presence of the metals responsible forthe specific mordants employed has...
TC4 MetroArchaeo 2019
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Antonietta Del Bove, Antonio Profico, Carlos Lorenzo
In physical anthropology sexual dimorphism refers to the morphological differences observed in female and male individuals belonging to the same species. In the human cranium a number of anatomical traits are known to be sexual dimorphic. In this work, we present a geometric morphometric approach to automatically detect the most sexual dimorphic on skeletal collections. We applied the workflow on the human neurocranium and we defined, without an a priori definition of modules, which portions are most sexually dimorphic. We used a large sample of sex-known human 3D skulls to analyse the rate...
TC4 MetroArchaeo 2019
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Boschin Francesco, Erika Moretti, Daniele Aureli, Jacopo Crezzini, Simona Arrighi
The analysis of bone surface modifications (BSM), such as butchering marks, is necessary to better understand how the exploitation of animal resources by past hominins influenced their biological and cultural evolution. Even if several studies have been carried out on this topic in the last decades, there are still some phenomena which need to be thoroughly understood. Here we try to quantify how can the depth of cut marks influence the shape of their crosssections. This is of crucial important for a valid interpretation of shape data collected on archaeological BSMs. In particular, two...
TC4 MetroArchaeo 2019
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Antoine Souron, Alexandre Napias, Thomas Lavidalie, Frédéric Santos, Ronan Ledevin, Jean-Christophe Castel, Sandrine Costamagno, Daniel Cusimano, Stephanie Drumheller, Jennifer Parkinson, Lee Rozada, David Cochard
Reliable discrimination of anthropogenic and non-anthropogenic bone surface modifications (BSM) is crucial to reconstructing the taphonomic history of bone assemblages and past behaviors of hominids and other animals. This discrimination is hindered by equifinality, i.e., BSM with similar morphologies that were produced by different agents. Here we propose a new method to identify the taphonomic agents responsible for BSM and apply it to an experimental data set containing 177 BSM produced by anthropogenic (stone tool-induced cut marks) and non-anthropogenic agents (carnivoran and...
TC4 MetroArchaeo 2019
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Panayota Vassiliou, Olga Papadopolou, Sabrina Grassini, Emma Angelini
Some copper alloy coins of the Ptolemaic period from a private collection, providing valuable evidence for both archaeometric as well as materials science and corrosion studies, have been investigated. The coins were found in the ancient city of Bubastis, known as Tell Basta, in the Nile Delta, Egypt. The coins have been examined by optical microscopy for their metallurgical structure, analysed by X-ray fluorescence and Electron Dispersion Spectroscopy for their composition, and by X-ray diffraction for the characterisation of their corrosion products. An attempt has been made to remove part...
TC4 MetroArchaeo 2019
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Leila Es Sebar, Alessandro Re, Marco Parvis, Emma Angelini, Sabrina Grassini
Safeguarding our cultural heritage for the future generations is possible only by applying tailored conservation strategies. The safeguard is a complex task and often requires measurements to be performed on the artefacts. This paper describes an interesting case regarding the metallic artefacts belonging to the Gori Art Collection at Fattoria Celle (Pistoia, Italy). This collection of modern art, developed inside a project of environmental art, is facing different corrosion phenomena due to its permanent exposure to outdoor environmental conditions. A non-invasive and in-situ...
TC4 MetroArchaeo 2019
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