1,325 research outputs found
Conceptualising lived experiences within the political economy of the Ecotourism-Extraction Nexus
No full textConceptualising lived experiences within the political economy of the Ecotourism-Extraction Nexus
No full text
Supplementary measurement values and processed images to: Visualization, measurement, and modelling of adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel
No full textThis research data was obtained and analyzed as part of a research project on adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel.
The following Creative Commons license applies to the research data (images and measurement values):
CC-BY 4.0
Author: Susanne Buscher
This data set contains all measurement values and calculated results of all measurement points in the Excel and CSV files (e.g. pressure drop, volumetric flow rates, void fraction, measurement uncertainties).
In addition, the numeric results of the image processing algorithm are included in the Excel and CSV files (e.g. mean bubble diameter, maximum bubble diameter, local film flow ratio, extent of the two-phase distribution across the channel width, measurement uncertainties).
The image folders contain the pre-processed images which were the input to the digital image analysis (i.e. the aligned and cropped image section, after subtraction of the image background), and the post-processed images visualizing the output of the image analysis (i.e. detected objects are inserted as colored regions).
The measurement values and the image folders are subdivided into measurements with uniform and non-uniform gas injection and designated with the numbers of the measurement points, which are listed in the Excel and CSV files.
The original photographs made during the measurements and used for image processing are given in:
uniform gas injection, part 1: https://doi.org/10.5281/zenodo.7985771;
uniform gas injection, part 2: https://doi.org/10.5281/zenodo.7986374;
uniform gas injection, part 3: https://doi.org/10.5281/zenodo.7986384;
non-uniform gas injection (part 4): https://doi.org/10.5281/zenodo.8067163
The research data supplements the following publications:
S. Buscher, 2023, Visualization, measurement, and modelling of adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel, Doctoral thesis, Technische Universität Berlin, https://doi.org/10.14279/depositonce-17866.
S. Buscher, 2019, Visualization and modelling of flow pattern transitions in a cross-corrugated plate heat exchanger channel with uniform two-phase distribution, International Journal of Heat and Mass Transfer 144, 118643, https://doi.org/10.1016/j.ijheatmasstransfer.2019.118643.
S. Buscher, 2021, Two-phase pressure drop and void fraction in a cross-corrugated plate heat exchanger channel: Impact of flow direction and gas-liquid distribution,
Experimental Thermal and Fluid Science 126, 110380, https://doi.org/10.1016/j.expthermflusci.2021.110380.
S. Buscher, 2022, Digital image analysis of gas-liquid flow in a cross-corrugated plate heat exchanger channel: A feature-based approach on various two-phase flow patterns, International Journal of Multiphase Flow 154, 104149, https://doi.org/10.1016/j.ijmultiphaseflow.2022.104149
Visualization of adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel: Part 2 - Original photographs, uniform two-phase distribution
No full textThese measurement data are obtained and analyzed as part of a research project on adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel. (See list of publications below).
The following Creative Commons license applies to the research data (images and measurement values) uploaded to the online repositories:
CC-BY 4.0
Author: Susanne Buscher
The measurement data is published in 2 data sets:
Data set I: Original image data (4 parts):
- uniform gas injection, part 1: https://doi.org/10.5281/zenodo.7985771;
- uniform gas injection, part 2: https://doi.org/10.5281/zenodo.7986374;
- uniform gas injection, part 3: https://doi.org/10.5281/zenodo.7986384;
- non-uniform gas injection (part 4): https://doi.org/10.5281/zenodo.8067163
This data set contains the original photographs of the two-phase flow in the cross-corrugated channel obtained with a high-resolution camera. In addition, the corresponding experimental parameters and flow patterns (for part 1-3 only) are included in the CSV files.
For uniform and non-uniform gas injection, respectively, the images were stored in sequentially numbered folders. The numbers of the folders correspond to the numbers of the measurement points listed in the attached CSV files with the associated experimental parameters.
The image folders are grouped in ZIP archives. Each ZIP archive contains the single-phase reference images which can be used for the two-phase images to conduct background subtraction, because the lighting conditions are equal for all images in one ZIP archive.
Data set II: Measurement values and processed image data:
- https://doi.org/10.14279/depositonce-17868;
This data set contains all measurement values and calculated results of all measurement points in the Excel and CSV files (e.g. pressure drop, volumetric flow rates, void fraction, measurement uncertainties).
In addition, the results of the image processing algorithm are included in the Excel and CSV files (e.g. mean bubble diameter, maximum bubble diameter, local film flow ratio, extent of the two-phase distribution across the channel width, measurement uncertainties).
The image folders contain the pre-processed images which were the input to the digital image analysis (i.e. the aligned and cropped image section of the channel without inlet, outlet, and peripheral regions and after subtraction of the image background), and the post-processed images visualizing the output of the digital image analysis for this image (i.e. detected objects are inserted as colored regions in the image section; the meaning of colors was explained in the publications of 2022 and 2023).
In this dataset, the image folders are also subdivided into measurements with uniform and non-uniform gas injection and designated with the numbers of the measurement points, which are listed in the Excel and CSV files.
The two datasets are the supplementary research data for the following publications:
- S. Buscher, 2023, Visualization, measurement, and modelling of adiabatic gas-liquid flow in a cross-corrugated plate heat exchanger channel, Doctoral thesis, Technische Universität Berlin, https://doi.org/10.14279/depositonce-17866. (supplemented by data sets I and II)
- S. Buscher, 2019, Visualization and modelling of flow pattern transitions in a cross-corrugated plate heat exchanger channel with uniform two-phase distribution, International Journal of Heat and Mass Transfer 144, 118643, https://doi.org/10.1016/j.ijheatmasstransfer.2019.118643. (supplemented by data set I, part 1-3)
- S. Buscher, 2021, Two-phase pressure drop and void fraction in a cross-corrugated plate heat exchanger channel: Impact of flow direction and gas-liquid distribution, Experimental Thermal and Fluid Science 126, 110380, https://doi.org/10.1016/j.expthermflusci.2021.110380. (supplemented by the measurement values in the Excel and CSV files of data set II)
- S. Buscher, 2022, Digital image analysis of gas-liquid flow in a cross-corrugated plate heat exchanger channel: A feature-based approach on various two-phase flow patterns, International Journal of Multiphase Flow 154, 104149, https://doi.org/10.1016/j.ijmultiphaseflow.2022.104149. (supplemented by data set II
Efficacy of a single milbemycin oxime administration in combination with praziquantel against experimentally induced heartworm (Dirofilaria immitis) infection in cats.
No full textThe efficacy of a combination of milbemycin oxime and praziquantel in preventing the establishment of experimentally induced heartworm (Dirofilaria immitis) infection was investigated in a study involving 24 young domestic short-hair cats. The animals were inoculated with 50 infective larvae on day 0. Subsequently they were divided into two groups of 12 animals each. The animals in group 1 were treated once with medicated tablets containing 4 mg milbemycin (minimum dose 2 mg/kg body weight) and 10 mg praziquantel (MILBEMAX(R)) on day 30 after infection. Cats in group 2 received placebo tablets on the same day. On day 183 post-infection a blood sample was taken from each animal before euthanasia and necropsy. The blood samples were tested for the presence of microfilariae and the necropsied animals were examined for the presence of adult worms. Microfilariae were not found in any of the investigated cats. No heartworms were found in the animals in group 1 (treated with medicated tablets). Out of the 12 placebo-treated cats 1 was heartworm-free, whereas all the others were found to be infected with 1-3 adult heartworms
A new Manhattan project? : interoperability and ethics in emergency response systems of systems
No full textIn this paper we discuss ethical challenges arising around IT supported interoperability in multi-agency emergency management and explore some methodological responses
Noncommutativity and nonassociativity of type II superstring with coordinate dependent RR field — the general case
No full textAbstract In this paper we consider non-commutativity that arises from T-duality of bosonic coordinates of type II superstring in presence of coordinate dependent Ramond-Ramond field. Action with such choice of the background fields is not translational invariant. Consequently, we will employ generalization of Buscher procedure that can be applied to cases that have coordinate dependent fields and that do not possess translational isometry. Bosonic part of newly obtained T-dual theory is non-local and defined in non-geometric double space spanned by Lagrange multipliers y μ and double coordinate ∆V μ . We will apply Buscher procedure once more on T-dual theory to check if original theory can be salvaged. Finally, we will use T-dual transformation laws along with Poisson brackets of original theory to derive Poisson bracket structure of T-dual theory
Soil contamination compositional index: A new approach to quantify contamination demonstrated by assessing compositional source patterns of potentially toxic elements in the Campania Region (Italy)
No full textPotentially toxic elements (PTEs) are a major worldwide threat to the environment due to the constant global
increase in industrial activity and urbanisation. Several studies have provided detailed maps and a better understanding of the spatial distribution patterns of PTEs in different matrices, but the majority of these studies
have simply neglected the compositional nature of geochemical data. The aims of this study are to reveal the
compositional behaviour and relative structure of 15 PTEs (subcomposition) in Campania, one of the most
contaminated regions in Italy, and to quantify the spatial abundance and identify the possible origins of these
PTEs. Robust compositional biplots were used to understand the natural grouping and origin of the PTEs. Ratios
of specific subcompositions (balances) of PTEs were calculated to map the spatial patterns and identify the
spatial variability of the PTEs. This study presents the preliminary steps needed to quantify and analyse the
relative difference in the spatial abundance of PTEs by applying a compositional abundance index. In addition, a
new soil contamination compositional index (SCCI) was elaborated to quantify topsoil contamination by the 15
PTEs and related subgroups following the compositional structure of the geochemical data.
The elevated spatial abundance of the 15 PTEs is related to highly urbanised (Naples and Salerno), highly
industrialised (Solofra) and intensely cultivated areas (Sarno River Basin), where the high dominance of elements from the anthropogenic subgroup (Pb, Sb, Sn and Zn) and high SCCI values suggest that contamination is
from anthropogenic sources. The high spatial dominance of elements from the volcanic rock subgroup (As, Be,
Se, Tl and V) in these same areas is likely related to geogenic sources, including alkalic pyroclastic rocks.
Although the high spatial abundance of Group B elements (Cd, Cr, Co and Ni) is related to Terra Rossa soils and
shaley facies of siliciclastic rocks of the southern Apennines, these same elements can also reach high abundances and reflect contamination (i.e. high SCCI values) from urbanised and industrialised areas due to e.g.,
tanneries and alloy production.
Other high spatial abundances of the 15 PTEs with little or no contamination (i.e. very low SCCI values) can
be related to nearby carbonate massifs, where a mixture of geogenic factors including weathering, advanced
pedogenic processes, adsorption and co-precipitation with Fe-/Mn-oxyhydroxides and the presence of pyroclastic material might all be responsible for an increase in abundance.
The lowest spatial dominance of the 15 PTEs occurs in the northeastern and southwestern siliciclastic zones of
the Campania Region, where there is a low level of urbanisation and industrialisation and therefore contamination from any source can be excluded
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