453 Works

InAsP and InP quantum dot laser structure data

P Smowton, S Shutts & I Karomi
Lasers are characterised in terms of the external voltage and light output from a single facet in terms of the current through the laser diode. Data is available in .IV extension files with a 2 column format for voltage (V) and for current (mA) and no extension files with a 2 column format for current (mA) and light (arbitrary units). At least 2 devices of length 1,2,3 and 4mm and of nominal 50um width are...

Non-Rigid 3D Human Models

D Pickup, X Sun, P Rosin, R Martin & Z Cheng
The dataset contains a collection of human models, representing a variety of individuals in a variety of poses. It includes both a dataset created from scans of real individuals, and a dataset of synthetically generated humans. The dataset has been used to benchmark non-rigid 3D shape retrieval algorithms.

Large eddy simulations of open channel flow and flow over a wall-mounted cube

M Cevheri, R McSherry & T Stoesser
The data are from Large Eddy Simulations of turbulent fluid flow in two different flow configurations. Simulations were performed to validate a new Local Mesh Refinement algorithm in an in-house Computational Fluid Dynamics code at Cardiff University. The two flow configurations are: 1) Open channel flow at friction Reynolds number 590; 2) Spatially-periodic flow over a wall-mounted cube at bulk Reynolds number 13000. Simulations were performed on fine, coarse and locally-refined grids. Vertical (i.e. wall-normal)...

Data underpinning \"N-Cyanation of Secondary Amines using Trichloroacetonitrile\"

, Ling KB &
A one-pot N-cyanation of secondary amines has been developed using trichloroacetonitrile as an inexpensive cyano source. A diverse range of cyclic and acyclic secondary amines can be readily transformed into the corresponding cyanamides in good isolated yields, with the method successfully utilised in the final synthetic step of a biologically-active rolipram-derived cyanamide. This approach exhibits distinct selectivity when compared to the use of highly toxic cyanogen bromide. Herein we include all underpinning data for this...

Increasing the processing speed of AFM tip-based nanomachining at the tool-workpiece interface

, Geng Y, & Bowen CR
This is the complete data set for a study, which aimed to increase the speed of the AFM tip-based nanomachining process at the interface between the tool and the workpiece. It comprises a number of related data sub-sets as follows: 1) Measured amplitude of the reciprocating motions of the piezoelectric actuator utilised (model NAC2402-H2.3 from Noliac, Denmark) as a function of the driving frequency. 2) AFM scanned data of three machined grooves with different frequencies:...

Measurement of oxygen extraction fraction (OEF): an optimised BOLD signal model for use with hypercapnic and hyperoxic calibration

A Merola, RG Wise & MA Germuska
Several techniques have been proposed to estimate relative changes in cerebral metabolic rate of oxygen consumption (CMRO2) by exploiting combined BOLD fMRI and cerebral blood flow data in conjunction with hypercapnic or hyperoxic respiratory challenges. More recently, methods based on respiratory challenges that include both hypercapnia and hyperoxia have been developed to assess absolute CMRO2, an important parameter for understanding brain energetics. The aim of this project is to empirically optimise a previously presented “original...

Combining the Advantages of Powder X-ray Diffraction and NMR Crystallography in Structure Determination of the Pharmaceutical Material Cimetidine Hydrochloride

AE Watts, K Maruyoshi, CE Hughes, SP Brown & KDM Harris
The crystal structure of the anhydrous phase of cimetidine hydrochloride was determined directly from powder X-ray diffraction data. The material was prepared bydehydration of the readily obtained monohydrate form of cimetidine hydrochloride, the only form for which a crystal structure has previously been reported. As such, solid-state dehydration processes typically yield the product phase as a microcrystalline powder, and structure determination was carried out directly from powder X-ray diffraction data, using the direct-space genetic algorithm...

Insight into mechanics of AFM tip-based nanomachining: bending of cantilevers and machined grooves

R Al-Musawi, EB Brousseau, Y Geng & FM Borodich
This is the complete data set for a study on the quasi-static behaviour of the cantilever of AFM probes during AFM tip-based nanomachining operations. It comprises a number of related data sub-sets. Example of a voltage signal recorded from a strain gauge (hereinafter referred to as “Z-detector”) mounted on a piezo actuator which defines the vertical motion of the fixed end of AFM probes, in the so-called backward direction. Z-detector output signals recorded during processing...

Images for Shape from Shading

J Wu
This database contains both synthetic and real-world images. Each image has a single object of interest. Manually cropped background is also provided for each image. 'Julius Caesar': a synthetic image created from a 3D model [1] under infinite frontal lighting, Lambertian reflectance, and orthographic projection. 'BunnyHi': a synthetic image created from a 3D model [2] under infinite frontal lighting, Lambertian reflectance, and orthographic projection. 'Pepper': a well-known real-world image for testing SFS. We resize and...

Direct synthesis of hydrogen peroxide in water at ambient temperature

DA Crole, SJ Freakley, JK Edwards & GJ Hutchings
The direct synthesis of hydrogen peroxide from hydrogen and oxygen has been studied using an Au-Pd/TiO2 catalyst. The aim of this work is to understand the balance of synthesis and sequential degradation reactions using an aqueous, stabiliser-free solvent at ambient temperature. The effects of the reaction conditions on the productivity of hydrogen peroxide formation and the undesirable hydrogenation and decomposition reactions are investigated. Reaction temperature, solvent composition and reaction time have been studied and indicate...

Modelling and control of VSC-HVDC transmission system

S Wang & J Liang
The research considers the modelling and control of VSC-HVDC transmission system for connecting renewable power and AC grids. It includes: - design of coordinate control strategies for the VSC-HVDC and wind farm together to improve the overall stability performances of the offshore wind energy system - development of anti-fault strategies and post-fault restoration of DC grids - increase of total efficiency and economy of the combined AC/DC grids Analysis and simulation using PSCAD/EMTDC were performed...

Data used for reliability analysis of half-bridge MMCs

J Guo & J Liang
The dataset includes the parameters of converters and results obtained by the proposed method shown in Paper "Reliability Analysis of MMCs Considering Sub-module Designs with Individual or Series Operated IGBTs". Data shown in the file ”Basic parameter.xlsx” are the parameters of converters. And the study was based on those parameters. Data shown in the file ”Results_Case A.xlsx” are the results of case A-"Reliability comparison of MMCs", including the converter parameters in sheet 1, failure rate...

Nanosecond laser processing of Vitreloy 1 with single pulses

E Williams & EB Brousseau
This is the complete data set for a research study that focused on the nanosecond laser processing of Zr41.2Ti13.8Cu12.5Ni10Be22.5 (also known as Vitreloy1 ) using a series of single pulse irradiation. It comprises a number of related data sub-set as follows. 1) The theoretical material temperature evolution with time for a pulse of 140 ns with different fluence values between 4.9 J/cm2 and 43.7 J/cm2. 2) Experimental values for crater diameters and depths obtained for...

Assessment of collection systems for High Voltage DC (HVDC) connected offshore wind farms

P Lakshmanan, J Liang & N Jenkins
This is the complete data set for the research article on, "Assessment of collection systems for High Voltage DC (HVDC) connected offshore wind farms", accepted for publication by "Electric Power Systems Research" journal in July 2015. This work is about a technical and economic comparative study of AC and DC collection systems for offshore wind farms. It comprises: Table I - the parameters of the wind farm (the size of the wind farm, number of...

Integrated III-V Haemocytometer: SU-8 surface treatment and analysis

A Sobiesierski, R Thomas, DJ Morgan, PM Smowton & A Moskalenko
SU-8 photoresist is used as a microfluidic structuring material. However the native SU-8 surface is too hydrophobic to enable capillary flow. The project that this dataset relates to has been the development of a two stage surface treatment that firstly renders the SU-8 surface hydrophilic and secondly stabilises the surface so that it remains hydrophilic for the longterm (in excess of three months). Contact angles images are taken using a goniometer and digital camera and...

State estimation of medium voltage distribution networks using smart meter measurements

Distributed generation and low carbon loads are already leading to some restrictions in the operation of distribution networks and higher penetrations of e.g. PV generation, heat pumps and electric vehicles will exacerbate such problems. In order to manage the distribution network effectively in this new situation, increased real-time monitoring and control will become necessary. In the future, distribution network operators will have smart meter measurements available to them to facilitate safe and cost-effective operation of...

Data underpinning \"Reduction of Folate by Dihydrofolate Reductase from Thermotoga maritima\"

, , , &
We have shown that DHFR from the hyperthermophilic bacterium Thermotoga maritima is able to catalyse reduction of folate to tetrahydrofolate with a similar efficiency to reduction of dihydrofolate under saturating conditions. NMR and mass spectrometry experiments showed no evidence for production of free dihydrofolate during either the EcDHFR- or TmDHFR-catalysed reductions of folate, suggesting that both enzymes perform the two reduction steps without release of the partially reduced substrate. Herein we include underpinning liquid chromatography...

Data supporting results concerning colourings for the edge dynamic graph colouring problem with and without future adjacency information.

Hardy B, Lewis R &
The graph colouring problem (GCP) is a well-studied combinatorial optimisation problem that is known to be NP-hard. Most algorithms for solving the GCP do not consider the possibility of a graph changing over time. In our research, we consider a dynamic version of the graph colouring problem in which the edge set is allowed to change. By considering a dynamic graph as a series of static graphs, our approach takes a feasible colouring for the...

Probabilistic wind-power forecasting model - case study datasets

, , , , &
The file named “InputData.xlsx’ is related to the wind power data used to train the model. The data consisted of half-hourly aggregated wind power values from wind farms across the Great Britain for the period of 01/03/2014–30/9/2014. Column headings are included to explain the variables. The file named “Outputs.mat’ is related to model outputs. This file can be opened only if you have installed MATLAB at your system. Once opened, a file of type “struct”...

Dataset for Reliability Modelling and Evaluation of MMCs (modular multilevel converters) under Different Redundancy Schemes

Guo J, Wang X, Liang J, &
The dataset includes the basic parameters and results for the reliability modelling and evaluation of modular multilevel converters (MMCs) under different redundancy schemes. Data shown in the file ”Basic parameter.xlsx” are the parameters of converters. And the study was based on those parameters. Data shown in the file ”Results_Case A.xlsx” are the results of case A, including the reliability of arms in the load-sharing mode obtained by using different models (as shown in sheet 1),...

Lean methane flame stability in a premixed generic swirl burner: isothermal flow and atmospheric combustion characterization

, , Bowen PJ, , Giles AP & Morris SM
Gas turbine combustors operating in lean premixed mode are known to be susceptible to flame blowoff due to competing influences of increasing chemical timescales and decreasing flow time scales under these conditions. In this study, combustion stability and the onset of flame blowoff in particular, are characterized in a new swirl burner operated with fully premixed methane (CH4) and air at thermal power of 55 kW, atmospheric combustor inlet pressure, and ambient (~290 K) combustor...

H2 production by the photocatalytic reforming of cellulose and raw biomass using Ni, Pd, Pt and Au on titania

, Jones WV, &
A method has been developed for sustainable hydrogen production using sunlight and biomass. It is shown that cellulose can be photoreformed to produce hydrogen, even in solid form, by use of metal-loaded titania photocatalysts. The experiments performed verified that the process is enabled by initial hydrolysis via glucose, which itself is shown to be efficiently converted to produce hydrogen by photocatalysis. Importantly, it is shown that not only precious metals such as Pt, Pd and...

Learning to Rank Retargeted Images

Chen Y, Liu Y & Lai Y
Image retargeting techniques that adjust images into different sizes have attracted much attention recently. Objective quality assessment (OQA) of image retargeting results is often desired to automatically select the best results. Existing OQA methods output an absolute score for each retargeted image and use these scores to compare different results. Observing that it is challenging even for human subjects to give consistent scores for retargeting results of different source images, in this paper we propose...

Data for \"Deoxycyanamidation of Alcohols with N-Cyano-N-Phenyl-p-Methylbenzenesulfonamide (NCTS)\"

, , , , Ling KB, &
The first one-pot deoxycyanamidation of alcohols has been developed using N-cyano-N-phenyl-p- methylbenzenesulfonamide (NCTS) as both a sulfonyl transfer reagent and a cyanamide source, accessing a diverse range of ter- tiary cyanamides in excellent isolated yields. This approach exploits the under developed desulfonylative (N-S bond cleavage) reac- tivity pathway of NCTS, which is more commonly employed for electrophilic C- and N-cyanation processes. Analysis of reaction products from this methodology resulted in the following data: 1H, 19F...

Resonantly excited exciton dynamics in two-dimensional MoSe2 monolayers

, &
The data contains results of four-wave mixing and transmission experiments on MoSe2 monolayers and their analysis.

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