1056 research outputs found
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Dataset for "A Novel In Situ High-Temperature Magnetometry Method for Radiofrequency Heating Applications"
No full textThe data provided here is for the electromagnetic heating of magnetite under radio-frequencies. The data includes that from material characterisation, in-situ magnetometry, calorimetry, in-situ power absorption measurement and arc-tangent modelling results. The data is aligned to the figures in the research publication and is intended that future researchers can make their own analysis based upon our work.The data is collected using techniques described fully in the accompanying research article.The data follows the figure numbers from the paper which should make it easy to navigate
Dataset for "EIT imaging of conductive mortars"
No full textData for the paper "EIT imaging of conductive mortars", which appears as chapter 8 of the thesis "EIT for void detection in conductive concrete". Three sets of electrical impedance tomography (EIT) imaging data are provided in the form of tabulated complex voltage measurements. The first two sets, corresponding to methods A and B in the paper, correspond to preliminary work the results of which are not shown in the paper but the data is provided for completeness. The third, corresponding to method C, includes all of the data that was collected, not all of which was used in the paper.The data were collected according to the methods described in the included readme.txt file and the associated thesis. The equipment used was the KHU Mark 2.5 EIT machine in the Engineering Tomography Laboratory in the Department of Electronic and Electrical Engineering at the University of Bath.Data consists entirely of tab-separated tables in .txt format, as generated by the KHU Mark 2.5 EIT device.The files of primary interest are the scan data files (XScan.txt), the format of which is described in the included readme.txt file. Directory naming makes it clear which files correspond to what result in the paper. Log and projection files are also included
Dataset for "Thermal comfort standards in the Middle East: Current and future challenges"
No full textThis dataset consists of 1,101 valid thermal comfort votes and 787 incomplete thermal comfort records that were collected between 2017 and 2019, during summer and winter. Each record includes measurement of four physical parameters affecting thermal sensation: air temperature (Ta), mean radiant temperature (Tr), relative humidity (RH), and air movement speed (Va). The measurements were coincident with the time of each individual survey of thermal sensation vote (TSV), to be compared to each other. Data were collected in 31 air-conditioned buildings in Amman, Doha, Dubai, and Jeddah. Measurements were done in four occupancy types: offices, schools, hospital, and mosques.Four physical parameters affecting thermal sensation – Air Temperature (°C), Mean Radiant Temperature (°C), Relative Humidity (%), Air Movement Speed (m s⁻¹) – were measured in all surveyed buildings coincident with the time of each individual survey.Data were collected using the following instruments:
1. SWEMA and HD 32.3, both compliant with ISO 7726 and ISO 7730 standards.
2. Extech HT200 heat stress wet bulb globe thermometer, used to monitor Air Temperature, Mean Radiant Temperature, Relative Humidity.
3. ATP uni-directional hot wire thermo-anemometer, used to simultaneously measure Air Movement Speed
Dataset for "Combined multi-attribute inpatient thermal comfort requirements in hospitals: A designer's assessment method"
Get PDFHospital Environmental Appraisal for Thermal-comfort (HEAT) is an evidence-based design tool created based on 52 pieces of research evidence that seeks to enhance decision-making related to patient thermal comfort (PTC) issues in inpatient wards. The framework of the tool is based on eight essential design domains that are; design flexibility, coordination, thermal adaptation, temperature ranges, activity level, external shading, building monitoring and airstream. Eight non-technical statements are driven from design domains to address common PTC issues. Hence, each statement provides a list of design recommendations to inform a variety of solutions that would be considered at several design phases.The evidence-based design combined with Design Science Research (DSR) was used to develop the tool. Specifically, a systematic literature review and double validation approach through semi-structured interviews and online surveys were conducted with healthcare designers.The tool was completely developed on Micrsoft Excel.The tool spreadsheet is straightforward. 'Read me' sheet introduces sufficient information on how the tool can be used by healthcare designers
Dataset for "Superconducting Quantum Interference in Twisted van der Waals Heterostructures"
No full textThe dataset represents the results of electrical measurement that underpin the figures in the main manuscript and supplementary materials of "Superconducting Quantum Interference in Twisted van der Waals Heterostructures" Nano Lett. 2021, 21, 6725−6731. This manuscript describes the use of dry stamping technologies to create 2H-NbSe2 van der Waals heterostructures with twisted interfaces. We show that these behave as Josephson junctions whose I-V characteristics depend systematically on twist angle. We have developed a fabrication protocol to pattern these into Superconducting QUantum Interferometer Device (SQUID) structures containing two junctions coupled in a superconducting loop, and show that these behave as high quality DC SQUIDs with high current modulation levels in an applied an magnetic field. The archived data represent current-voltage characteristics of our Josephson Junctions and SQUIDs as a function of temperature, magnetic field and twist angle. These have been captured to establish the damping regime the junctions are operating in and to characterise the performance of SQUIDs fabricated from them.Data either represent the raw experimental datafiles as captured with our measurement apparatus, or as parameter extracted directly from these raw data files using standard fitting practices.N/AData were collected using a Keithley 2400 source measure unit and a Kepco BOP 50-8 bipolar power supply controlled with LabVIEW code. Samples were cooled in a JANIS Research SHI-4-1 crocooler system pumped with a Leybold TURBOLAB80-FF-ISO pump.All data uploaded as readily accessible text files
Dataset for paper entitled "A Frequency Modulation-Based Taxel Array: A Bio-Inspired Architecture for Large-Scale Artificial Skin"
No full textDatalogs acquired during experiments related the article "A Frequency Modulation-Based Taxel Array: A Bio-Inspired Architecture for Large-Scale Artificial Skin." These datasets contains both raw data e.g. FM mixed signals generated by the electronic architecture and processed signals e.g. reconstructed demodulated signal.
The files are similarly named in pairs e.g. File1XX.txt and FileFM1XX.txt containing the processed data and mixed FM respectively. Another file per pair complements these files providing the list of main variable used (e.g. sampling rate, filters, decimation) and are named as Metadata_File1XX.txt. Two other files are included File1static8k.txt and File1static23k.txt used to generate the input/reconstruction image of the article.
These data are collected to assess the performances of the proposed architecture.The hardware used comprises of Hall-effect sensors, FM encoding architecture, NI compact rio acquisition module and Labview processing.
A magnet was used to trigger sensor response and the encoding architecture modulated the signal into FM. The NI 9775module was used to sample this analogue signal that was then modulated using realtime system built-in in the Compact RIO. FM and demodulated signal were logged (datasets)
Results of contextualised performance assessment of refugee shelters globally
No full textThis dataset contains information about the results of contextualised performance assessment of shelter around the world. 187 previously deployed shelters (64 Emergency, 75 Transitional and 48 Durable Shelters), from 40 countries were evaluated by the authors using SAM (the Shelter Assessment Matrix), and the designs were collated from various sources. Context-specific design assessment was conducted on each shelter design considering their local, cultural, political and climatic issues. These shelters were constructed between 1945 and 2018. This exercise: (i) shows whether SAM is able to provide a diverse range of scores when analysing real shelters (rather than all shelters obtaining similar scores); (ii) provides the first contextual performance analysis of previously deployed shelters around the world; (iii) generates a repository of scored shelters for those to judge their designs against.One hundred eighty-seven previously deployed shelter designs, from 40 countries were evaluated by the authors using SAM (Shelter Assessment Matrix), and the designs were collated from various sources. Context-specific design assessment was conducted on each shelter design considering their local, cultural, political and climatic issues
Dataset for "Improving Thermal Comfort in Refugee Shelters in Desert Environments"
Get PDFThe dataset describes monitored environmental conditions of unoccupied shelter prototypes in the refugee camp of Azraq (Jordan). The monitored environmental conditions are temperature and relative humidity every hour both outdoors and indoors. The 12 shelter prototypes include a control shelter without modifications and 11 variants implementing a range of passive/active measures (increased ventilation, insulation, thermal mass and/or roof shades, evaporative cooler and earth tube).The work was completed using two hypotheses:
1. It is possible to take an existing shelter design, that is already deployed at scale and has been shown via field surveys to provide unsatisfactory thermal comfort, and complete a parametric analysis using field testing of prototypes to generate an affordable derivative of the same appearance that provides improved internal thermal conditions as measured against acceptable thermal comfort bands.
2. That similar results can be achieved using thermal modelling without any field testing even though many of the modelling inputs are unlikely to be accurately known.
To assess our hypotheses, the thermal conditions within eleven variants of identical form but representing different possible improvement strategies were compared to a base design.
The success of the prototypes was assessed by comparing the maximum daytime temperature and number of degree hours over comfort levels compared to the control shelter. The success of computational modelling was to be assessed by comparing predicted performance against monitored performance.
Twelve unoccupied test shelters were monitored (temperature, humidity, opening of doors and windows) for ten weeks from 15/7/19 – 21/9/19. Nine shelters received passive adaptations, two received active adaptations, all adaptations were focused on improving internal summer thermal comfort.
The shelters were simulated in EnergyPlus v9.0.1
Two metrics are used to evaluate the thermal performance of each shelter: air temperature and operative temperature.
Overheating is typically quantified as the total number of hours the threshold has been surpassed (total hour count, OH_ch [h]). However, such a metric fails to account for the severity of overheating, since deviations of 1 K over the threshold are more benign than deviations of 6 K. For this purpose, a second metric weighs (multiplies) the duration of overheating according to the temperature deviation above the threshold (to give weighted hours of overheating, OH_wh [K·h]).
Here we use the ASHRAE Standard 55 Thermal Comfort Model together with that found in Vellei.
The change in internal conditions provided by the interventions are assessed for both the physical and modelled shelters using the following metrics:
1. Minimum air temperature difference between indoors and outdoors, rTp-e (°C). Negative numbers indicate the extent to which air temperature in the shelter is cooler than the external air temperature.
2. Maximum indoor air temperature difference between shelter variant and control shelter, rTp-c (°C). Negative numbers indicate the extent to which the shelter is cooler than the control shelter.
3. Minimum indoor air temperature, T_min (°C)
4. Mean indoor air temperature, T_avg (°C)
5. Maximum indoor air temperature, T_max (°C)
6. T_comf_max_ashrae: ASHRAE upper limit for indoor operative temperature (80% acceptability) (°C)
7. T_comf_max_vellei: Vellei’s model upper limit for indoor operative temperature (80% acceptability) (°C)
8. Total overheating hours compared with the adaptive comfort temperature, OH_ch (h). The metric is provided for the two thresholds considered, ASHRAE’s and Vellei’s.
9. Total overheating Kelvin hours compared with the adaptive comfort upper temperature, OH_wh (K·h). The metric is provided for the two thresholds considered, ASHRAE’s and Vellei’s
Dataset for "Continuous Production of Metal Oxide Nanoparticles via Membrane Emulsification−Precipitation"
No full textThis dataset contains for the manuscript Continuous Production of Metal Oxide Nanoparticles via Membrane Emulsification−Precipitation, including XPS and photocatalytic data.TEM (JEOL-JEM-2100 Plus) was used to characterize the TiO2 NPs. ImageJ was used to perform statistical image analysis of TEM micrographs to calculate average particle size. XRD diffraction patterns were obtained using a Bruker D8-Advance. A Raman spectrometer was used to characterize the samples (InVia, Reinshaw). The droplet size distribution of the emulsions was analysed by DLS with a detection angle of 173° (Zetasizer Nano-ZS, Malvern Instruments). The interfacial tension of the dispersed phase/continuous phase were measured using a goniometer (Dataphysics OCA20) based on the pendant drop method.30 The band gap of the TiO2 NPs was obtained by measuring the reflection spectra using a UV-vis spectrophotometer (Cary 100). X-ray photoelectron spectroscopy (XPS) was performed on a Thermo Fisher Scientific K-alpha+ spectrometer. Samples were analysed using a micro-focused monochromatic Al x-ray source (72 W) over an area of approximately 400 micrometres. Data was recorded at pass energies of 150 eV for survey scans and 40 eV for high resolution scan with 1 eV and 0.1 eV step sizes respectively. Data analysis was performed in CasaXPS using a Shirley type background and Scofield cross sections, with an energy dependence of -0.6. The specific surface area and pore size distribution were characterized by analysing the N2 adsorption and desorption isotherms obtained at 77 K using a micromeritics 3Flex equipment.
The photocatalytic activity (PCA) of TiO2 NPs was investigated using a Peschl Ultraviolet photoreactor (PhotoLAB, B400-700 Basic Batch-L) equipped with either low pressure (novaLIGHT LP30x, 2.7 W emission at 254 nm) or medium pressure (novaLIGHT TQ150 HG, 150 W broad band UV-visible emission spectrum) mercury lamps, both Heraeus Noblelight. Photocatalytic experiments were conducted with 0.1 g (low pressure lamp) and 0.05 g (medium pressure lamp) of TiO2 NPs dispersed in 700 mL (determined by reactor size) ultrapure water (MilliQ), respectively. 10 μM phenol was added as model pollutant. During irradiation the solution was magnetically stirred and maintained at 10 °C. Ten samples at equidistant time intervals were taken for 60 minutes and 120 minutes for low pressure lamp and medium pressure lamp experiments, respectively. HPLC was performed with an Agilent, series 1100 machine with a Poroshell 120 EC-C18, 2.7 μm, 4.5 x 50 mm column. Isocratic conditions used for phenol detection were 15 % acetonitrile and 85 % 5 mM phosphoric acid (pH 2.4), flow rate of 0.5 mL/min and UV detection at 220 nm, at 8 minutes retention time
Dataset for "Determining the structure of zeolite frameworks at high pressures"
No full textA collection of data used for the article "Determining the structure of zeolite frameworks at high pressures."
In this work, we present our method which involves geometric modelling, implemented in GASP (Geometric Analysis of Structural Polyhedra) software, to obtain crystal structures at high-pressures when Rietveld refinements alone fall short. We show that GASP can be used to simulate theoretical compression mechanisms of zeolite frameworks at the atomic level, providing optimised structural models as reasonable starting points for full crystal structure analysis. We apply our method to investigate the effect of channel content on compression mechanisms of the LTL framework. Experiments were conducted at ISIS Neutron and Muon Source, UK. We used time-of-flight (ToF) neutron diffraction to measure changes in the structure of zeolite K-L up to pressures of 4 GPa, using Fluorinert and a 4 : 1 mixture of perdeuterated methanol and ethanol (m.e.) as non-penetrating and penetrating pressure transmitting media (PTM), respectively. We also discuss the flexibility window as a foundation supporting this approach.
Refer to the README files for each folder for details on its contents.High pressure, ToF, powder neutron diffraction data were collected using the PEARL instrument at the ISIS facility, Rutherford Appleton Labs, Didcot, UK. Dehydrated K-LTL samples were loaded into a null-scattering TiZr gasket with a pellet of lead as a pressure marker in a dry, argon glovebox. In the
first experiment, Fluorinert was chosen as a non-penetrating (PTM) and, in the second, a 4 : 1 mixture of perdeuterated m.e. was chosen as a penetrating PTM. Samples were compressed using the Paris-Edinburgh cell equipped with single-toroidal, zirconia-toughened alumina (ZTA) anvils. Pressure measurements were collected at applied cell loads from 7 to 50 tonnes in 5 tonnes intervals across a d-spacing range from 0.5 to 4.1 Å.All refinements were performed using the GSAS 2 package. Experimental unit-cell parameters were extracted from compression data using the LeBail whole pattern fitting method . Geometric simulations were then performed using GASP software
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