Defence and Security

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Browsing Defence and Security by Type "Dataset"

Now showing 1 - 20 of 59
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    20230805-Crater Details FINAL.xlsx
    (Cranfield University, 2024-01-29 10:23) Collett, Gareth
    This data set compares surface explosions for spherical and hexahedral charges in alluvial soil.
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    ItemOpen Access
    A Review of Erosive Burning Models for Solid Propellant Rocket Motors (Spreadsheet)
    (Cranfield University, 2021-07-27 10:13) Macêdo-Gonçalves, Daniel
    This spreadsheet, an integral part of the thesis "A Review of Erosive Burning Models for Solid Propellant Rocket Motors" (Guided Weapon Systems MSc, 2020/2021), presents a useful tool in modelling the erosive burning rate of composite and double-base propellants, from modifications to the theoretical model originally proposed by Paul and Mukunda (1997).
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    Age-related trends in the trabecular micro-architecture of the medial clavicle: Is it of use in forensic science?
    (Cranfield University, 2020-01-21 15:02) McGivern, Hannah; Greenwood, Charlene; Marquez-Grant, Nicholas; F. Kranioti, Elena; Zioupos, Peter
    The mechanical and structural properties of bone are known to change significantly with age. Within forensic and archaeological investigations, the medial end of the clavicle is typically used for estimating the age-at-death of an unknown individual. Although, this region of the skeleton is of interest to forensic and clinical domains, alterations beyond the macro-scale have not been fully explored. For this study, non-destructive micro-computed tomography (µ-CT) was employed to characterise structural alterations to the cancellous bone of the medial clavicle. Fresh human cadaveric specimens (12-59 years) obtained at autopsy were utilised for this study, and were scanned with a voxel size of ~83µm. Morphometric properties were quantified and indicated that the bone volume, connectivity, mineral density and number of trabeculae decreased with age, while the spacing between the trabeculae increased with age. In contrast to other sub-regions of the skeleton, trabecular thickness and degree of anisotropy did not correlate with age, which could suggest that the network is becoming increasing perforated with age rather than exhibiting trabecular thinning. These results are used in the context of deriving a potential protocol for forensic investigations by using this particular and largely unexplored region of the skeleton and provide inspiration for future experiments concerning micro-architectural and small scale changes in other regions of the human skeleton.
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    ItemOpen Access
    Airworthiness and No Fault Found
    (Cranfield University, 2022-12-14 09:56) Lacey, Laura
    Excel spreadsheet with the results from a questionnaire aimed at aircrew on their experience and knowledge of no fault found and its impact on airworthiness.
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    Assessment of HEFA, ATJ, GTL-S8 and Farnesane as alternative jet fuels based on their water shedding characteristics
    (Cranfield University, 2022-06-24 10:09) Ugbeh, Judith
    Previous studies have shown that impurities like surfactants in jet fuel have impacted the performance of coalescer filters. Therefore, aircraft maintenance schedules require an additional operation which is commonly known as water sumping. Normally after bulk fuel transfers, fuels are allowed to settle in tanks and sumping is carried out to remove free water. Water settling tests can indirectly measure surfactants in jet fuels, yet there is no reliable data that focuses on the water settling rate of alternative jet fuels that comply with or are very similar to the Jet A-1 specification. Additionally, the influence of the jet fuel composition on the rate of water-shedding is still unknown. Therefore, there is a need for a reliable study to fill this lack of knowledge. In this work, the water settling rate of five different jet fuels made to different national standards in comparison to conventional Jet A-1 fuel was evaluated. GTL S-8, HEFA and ATJ has been identified as potential/alternative candidates for ASTM D7566 certified jet fuels.
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    C-IEDD metacognitive requisite ratings
    (Cranfield University, 2021-10-06 10:26) Smy, Victoria; Witheridge, Annamaria; Clewley, Natalie; Dodd, Lorraine
    Red/amber/green (RAG) analysis of metacognitive requisites at key decision points throughout a challenging counter-improvised explosive device disposal incident.
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    Characterization of water droplets size distribution in aviation turbine fuel: Ultrasonic homogeniser vs. High shear speed mixer
    (Cranfield University, 2022-06-24 10:10) Ugbeh, Judith
    Pumps, pressure drops across fittings, and flight operations (such as turning manoeuvres, take-off, and landing) are some of the many sources of turbulence mixing and shearing in aircraft fuel systems, therefore, making it an inevitable condition. Literature established that shearing conditions would influence the droplets and droplets size distribution in oil/water emulsion. So, low intensity shearing conditions could be beneficial as it promotes droplet coalescence, which could be a driving force for a weak emulsion. However, to date no experimental data shows the influence homogenising intensity and total water content has on dispersed water droplet size distribution (DSD) in aviation fuel. Therefore, to expand knowledge of improving quantification to the measurements of dispersed water droplets in aviation fuel, this study characterizes dispersed water droplets in aviation turbine fuel, varying available laboratory homogenising gadget and water content. Results presented shows that droplet count increases with water concentration and shearing effect. To provide more statistical evidence, kurtosis and skew values was calculated from the extrapolated data and compared with data from a hexanol/water mixture given that hexanol is likely to form a stable emulsion. Experimental results shows that the higher the homogenising intensity the more stable the emulsion is likely to be with a higher kurtosis and skew value close to that for the hexanol/water mixture.
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    Column breakdown- Loam.xlsx
    (Cranfield University, 2022-07-20 14:41) Gutierrez Carazo, Encina
    IHE traces found in sandy loam soil columns after passing them by dynamic experiment and leaving the residues for three weeks in contact with the soil.
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    Column breakdown- Sand.xlsx
    (Cranfield University, 2022-07-20 14:39) Gutierrez Carazo, Encina
    IHE traces found in sandy colums broke in four different sections after chemicals breaking through and leaving for three weeks
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    ItemOpen Access
    COMBAT SIMULATION - TWO SIDES.xls
    (Cranfield University, 2016-05-25 09:51) Boutselis, Petros; Ringrose, Trevor
    The data are the outputs of the simulation of a closed-loop, two-sides (Blue vs Red) combat model saved in an Excel spreadsheet. The 1st tab has the input data while the other two tabs have the outputs for the Blue and for the Red. Each column in the Input tab is a design point randomly selected (250 in total). The first two rows represent the number of tanks and recce of the Blue, while rows 3 and 4 represent the respective Red. The 5th row represents the probability of shock that has been applied the same to both sides. Rows 6, 7 and 8 represent the percentage Unit participation of Tanks, Machine Guns and Anti-tanks respectively. These last three variables also apply equally to both Blue and Red. The model used (SIMBAT) is stochastic and therefore each design point was run 40 times, taking care to use the same random numbers for each point (Common Random Numbers) Therefore each of the 250 columns in the two output tabs has 40 rows. The data have been used in: P. Boutselis, Trevor J. Ringrose GAMLSS and neural networks in combat simulation metamodelling: A case study. Expert Syst. Appl. 40(15): 6087-6093 (2013), doi:10.1016/j.eswa.2013.05.023 to produce two different metamodels: a statistical model (GAMLSS) and a neural network (ANN), while recently the same data have been used to produce a Bayesian Network.
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    Comparison between simulated and experimental data
    (Cranfield University, 2022-09-05 09:50) Gutierrez Carazo, Encina
    This research assesses the performance of the model developed in GoldSim by comparing its outcome (IHE breakthrough curve in sandy soil) to indepdendent experimental data a) accelerated and controlled indoor conditions over 42 days and b) weathering conditions over a year
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    Data for PONE-D-16-41391 'Age at death' method by Bonicelli et al 2017
    (Cranfield University, 2017-05-22 08:31) Zioupos, Peter; Bonicelli, Andrea; Elena Kranioti, Dr
    Data underpinning the article in PLOS ONE: "Rib biomechanical properties exhibit diagnostic potential for accurate ageing in forensic investigations" by: Andrea Bonicelli 1,2 , Bledar Xhemali 3 , Elena F. Kranioti 1,4, Peter Zioupos 2
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    Data for the article “Localized tissue mineralization regulated by bone remodelling: a computational approach”
    (Cranfield University, 2017-05-19 11:52) Zioupos, Peter; José Manuel García Aznar, Professor; Oscar Decco, Professor; Marcelo Berli, Dr; Carlos Borau, Dr; Adams, George; Richard Cook, Dr
    Data for the PLOS ONE article: “Localized tissue mineralization regulated by bone remodelling: a computational approach”
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    Data Set for Comparative Analysis of Blast Prediction Software for Far-Field Shock Wave Effects Behind a Blast Wall
    (Cranfield University, 2024-09-05) Chester, Alastair
    A comparative analysis of blast prediction software for far-field shock wave effects behind a blast wall. Performed using Autodyn, BlastFoam, ProSAir, Viper::Blast and WALAIR++. The resulting software setup file examples are included here.
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    Data supporting "A new parafocusing paradigm for X-ray diffraction"
    (Cranfield University, 2020-12-09 10:07) Prokopiou, Danae; McGovern, James; Davies, Gareth; Godber, Simon; Rogers, Keith; Evans, Paul; Dicken, Anthony
    A new approach to parafocusing X-ray diffraction implemented with an annular incident beam is demonstrated for the first time. The method exploits an elliptical specimen path on a flat sample to produce relatively high intensity maxima that can be measured with a point detector. It is shown that the flat-specimen approximation tolerated by conventional Bragg–Brentano geometries is not required. A theoretical framework, simulations and experimental results for both angular- and energy-dispersive measurement modes are presented and the scattering signatures compared with data obtained with a conventional pencil-beam arrangement.
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    Data supporting 'Evaluate the effects of Insensitive High Explosives residues on soil by using an Environmental Quality Index (EQI) approach'
    (Cranfield University, 2023-02-16 16:14) Persico, Federica; Temple, Tracey; Coulon, Frederic; Ladyman, Melissa
    Data presented show the fate and transport of Insensitive High Explosives (IHE) in two different soils, a pristine and a land-degraded soil. Results are also evaluating changes to the physical, chemical and biological sections of the soil over time. Moreover, and and Environmental Quality Index (EQI) has been developed and each value has been scored to understand if soil quality is impacted by the explosive presence.
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    Data supporting: 'Assessing the performance of environmental management in academic research laboratories'
    (Cranfield University, 2022-11-23 16:56) Ladyman, Melissa; Persico, Federica; Gutierrez Carazo, Encina; Temple, Tracey
    Electronic survey and survey data for the paper: Assessing the performance of environmental management systems in academic research laboratories
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    Data supporting: 'Association between nanoscale strains and tissue level nanoindentation properties in age-related hip-fractures'
    (Cranfield University, 2023-01-03 15:26) Bonicelli, Andrea; P Cobb, Justin; R Boughton, Oliver; Hansen, Ulrich; Abel, Richard; Zioupos, Peter
    Measurement of the properties of bone as a material can happen in various length scales in its hierarchical and composite structure. The aim of this study was to test the tissue level properties of clinically-relevant human bone samples which were collected from donors belonging to three groups: ageing donors who suffered no fractures (Control); untreated fracture patients (Fx-Untreated) and patient who experienced hip fracture despite being treated with bisphosphonates (Fx-BisTreated).
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    Data supporting: 'Development of an environmental hazard-based rating assessment for defence-related chemical compounds in ecological soil systems'
    (Cranfield University, 2022-08-31 16:53) Persico, Federica; Temple, Tracey; Coulon, Frederic; Ladyman, Melissa
    Environmental hazard-based methods are commonly used to categorise the severity of chemical contamination to ecological soil systems, although a traffic-light approach (green, amber, red) has never been used to assess these consequences. A traffic light approach is an easy to interpretate data as it has a clear visual display which can provide an early warning approach for stakeholders to identify areas that require further investigation. This approach should be underpinned by extensive research data and systematic methods of development. However, the extent of reliable data available for specific chemicals can be limited and therefore decision making may rely on expert judgement. Therefore, in this study, an environmental hazard-based rating methodology was developed by combining the guidelines from the European Chemical Agency (ECHA) and the USEPA for Predicted Non-effect Concentration (PNEC) and Ecological Soil Screening Levels (Eco-SSL) for defence-related chemicals (2,4,6-trinitrotoluene (TNT), 1,3,5-trinitro-1,3,5-triazinane (RDX), cypermethrin, perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS)). The developed hazard-based rating assessment was design to categorise the chemicals into low, medium and high environmental hazards priority to inform and ease the decision-making process for contaminated areas to ensure that sustainable operations are carried out.
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    Data supporting: 'Microarchitecture and morphology of bone tissue over a wide range of BV/TV assessed by micro-computed tomography and three different threshold backgrounds'
    (Cranfield University, 2022-09-01 15:36) Zioupos, Peter; Adams, George; B. Cook, Richard; Hutchinson, John
    Data for the published paper entitled: "Microarchitecture and morphology of bone tissue over a wide range of BV/TV assessed by micro-computed tomography and three different threshold backgrounds"