cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Model for Compression-Weakening Materials and the Elastic Fields due to Contractile Cells
Creators: name: Rosakis, Phoebus
name: Notbohm, Jacob
name: Ravichandran, Guruswami
Publisher: name: arXiv
Year: 2014
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We construct a homogeneous, nonlinear elastic constitutive law, that models aspects of the mechanical behavior of inhomogeneous fibrin networks. Fibers in such networks buckle when in compression. We model this as a loss of stiffness in compression in the stress-strain relations of the homogeneous constitutive model. Problems that model a contracting biological cell in a finite matrix are solved. It is found that matrix displacements and stresses induced by cell contraction decay slower (with distance from the cell) in a compression weakening material, than linear elasticity would predict. This points toward a mechanism for long-range cell mechanosensing. In contrast, an expanding cell would induce displacements that decay faster than in a linear elastic matrix.
description: 18 pages, 2 figures
title: A study of in-vitro cell growth for bioreactor constructs
titleType: Other
Creators: name: Visanuvimol, Korntip
Publisher: name: University of Dundee
Year: 2022

description: Tissue engineering is, despite many advances, still a long way from its aim of being able to reproduce in-vitro fully functionalised, vascularised musculoskeletal tissues. Pharmacy and research groups are currently in urgent need of reliable, comparable in-vitro testing grounds to analyse and test new drugs in order to gather more knowledge about physiology and pathology of these tissues and to fight diseases of the musculoskeletal system. This research aims to study different cell culture methodologies using a bioreactor to mature and differentiate muscle and tendon tissues, engineered tissues from different cell sources. This will allow further study on the effects of electrical, mechanical stimuli in-vitro and should lead to an analysis of the effect of single and combined stimulation methods applied to the subject tissue, this will further allow the finding of optimised parameters to mature and functionalise engineered muscle and tendon tissues. Using fibroblast and myoblast cells as the starter cells in the cell culture dish, it was observed that cell-cell adherence occurred which helped to accelerate the growth of the cells in the culture dish. The resulting two dimensional tissue structure needed a period of about 30 days at 37 degree Celsius in the incubator to grow the sufficient number of cells to enable further study in three dimensional tissue structure. When the required number of cells had been reached, a 3D scaffold made of fibrin was added which acted as the extra cellular matrix needed to allow the cells to form a more complex functionalised tissue. This was done by mixing solutions of fibrinogen and thrombin with a small amount of aprotinin solution. The aprotinin solution helps in delaying cell digesting of the fibrin gel and leaves enough fibrin gel to act as the extra cellular matrix for the three dimensional tissue formation.

It was also observed that cell contamination occurred if the cells were grown to more than 60-70% of the culture plate surface area, so cells were needed to be harvested before reaching this point as they would begin to start emitting chemicals which inhibit further growth. It was also important to prevent the contamination of the equipment as this would inhibit the cell growth. This report therefore describes the procedure in the equipment sterilization, the effect of different solutions in the cell growth and contamination in the cell culture procedure, much research effort was placed on this particular aspect.
Low noise 400 W coherently combined single frequency laser beam for next generation gravitational wave detectors
Creators: name: Wellmann, Felix
name: Bode, Nina
name: Wessels, Peter
name: Overmeyer, Ludger
name: Neumann, Jörg
name: Willke, Benno
name: Kracht, Dietmar
Publisher: name: Washington, DC : Optica
Year: 2021
Subjects: subject: Fiber amplifiers
subject: Gravitational effects
subject: Gravity waves
subject: High power lasers
subject: Laser beams
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Design studies for the next generation of interferometric gravitational wave detectors propose the use of low-noise single-frequency high power laser sources at 1064 nm. Fiber amplifiers are a promising design option because of their high output power and excellent optical beam properties. We performed filled-aperture coherent beam combining with independently amplified beams from two low-noise high-power single-frequency fiber amplifiers to further scale the available optical power. An optical power of approximately 400 W with a combining efficiency of more than 93% was achieved. The combined beam contained 370 W of linearly polarized TEM00-mode and was characterized with respect to the application requirements of low relative power noise, relative beam pointing noise, and frequency noise. The noise performance of the combined beam is comparable to the single amplifier noise. This represents, to our knowledge, the highest measured power in the TEM00-mode of single frequency signals that fulfills the low noise requirements of gravitational wave detectors.
Demi-linear Analysis II -- Demi-distributions
Creators: name: Li, Ronglu
name: Zhong, Shuhui
name: Kim, Dohan
name: Wu, Junde
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this paper, we establish a demi-distributions theory which develops the usual distribution theory, in particular, we show that many conclusions as differentiations, Fourier transforms and convolutions can be generalized to the demi-distributions theory.
Single-cycle pulse compression in dense resonant media
Creators: name: Arkhipov, Rostislav
name: Arkhipov, Mikhail
name: Demircan, Ayhan
name: Morgner, Uwe
name: Babushkin, Ihar
name: Rosanov, Nikolay
Publisher: name: Washington, DC : Optica
Year: 2021
Subjects: subject: Frequency converters
subject: Laser pulses
subject: Alternative routes
subject: Frequency up conversion
subject: High frequency HF
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We propose here a new approach for compression and frequency up-conversion of short optical pulses in the regime of extreme nonlinear optics in optically dense absorbing media, providing an alternative route to attosecond-scale pulses at high frequencies. This method is based on dynamics of self-induced transparency (SIT) pulses of nearly single cycle duration, leading to single-cycle-scale Rabi oscillations in the medium. The sub-cycle components of an incident pulse behave as separate SIT-pulses, approaching each other and self-compressing, resulting in the threefold compression in time and frequency up-conversion by the same factor. As we show, the scheme can be cascaded, staying at the subsequent stage with nearly the same compression and up-conversion ratio. In this way, as our simulations show, after only few micrometers of propagation, a 700 nm wavelength single cycle pulse can be compressed to a pulse of 200 attoseconds duration located in XUV frequency range.
Pupil misbehaviour in secondary school physical education lessons
Creators: name: Hardy, Charlotte E.
Publisher: name: Loughborough University
Year: 2019
Subjects: subject: 119999 Medical and Health Sciences not elsewhere classified
subject: FOS: Other medical sciences

description: The area of study grew out of the author's experiences during her practical in Warwickshire and Coventry schools, and from her concerns as a pre-service teacher about class control, pupils' responses to her reprimands and the pupils' subsequent behaviour. The purpose of the study was to investigate the nature and extent of pupil misbehaviour incidents in secondary school mixed-sex physical education lessons, and the responses of experienced male and female physical education teachers to those incidents. Ten schools were randomly selected from forty-five co-educational secondary schools within a twenty-five mile radius of an East Midlands University. Coders, working in pairs and trained in the data-collecting procedures, observed 119 mixed-sex physical education lessons in fourteen activities, and they recorded 593 pupil misbehaviour incidents. The number of intact classes observed. in each school ranged from ten to fourteen with the length of the lesson ranging from twenty-five to seventy minutes and the class size ranging from sixteen to thirty-one pupils. The number of teachers involved in each school varied from two to four and, of the observed lessons, sixty-two were taught by male teachers and fifty-seven by female teachers. The majority of pupil misbehaviour incidents occurred during teachers' instructions and generally involved one pupil or a group of pupils, although a ripple effect was sometime evident. Although they usually involved one pupil or a group of pupils, a greater number of pupils were affected by the incidents. The incidents were mainly teacher-owned and the teachers usually dealt with them in fifteen seconds or less. There was no significant difference in the frequency of pupil misbehaviour incidents between morning and afternoon classes but males committed significantly more misbehaviour incidents. The teachers' responses were mainly verbal with the vast majority being made in public and in a controlled and fun manner. The teachers' focus was on the pupils' behaviour, and, in taking a final action against misbehaving pupils, teachers tended to allow them to remain in the class. Male teachers had more disruption between pupils but less attentional incidents than female teachers, and in their responses to pupil misbehaviour incidents they were less verbal, more private and more controlled and firm.
title: Photodynamic and photothermal human cancer cell killing using gold nanoparticles
Creators: name: Chadwick, Samantha
Publisher: name: University of Liverpool Repository
Year: 2015

description: Cells from a human fibroblast cell line (HeLa) were used to explore the role of photothermal and photodynamic effects of laser irradiation using plasmonic gold nanoparticles. The two types of spherical gold nanoparticles used were (i) citrate- stabilised and (ii) peptide stabilised particles. These particles were prepared following standard protocols and characterised by a range of methods including TEM, UV-vis spectroscopy and dynamic centrugal sedimentation. Different sizes of particles were prepared and the effect of size was investigated. Cellular uptake of the nanoparticles prior to exposure to laser light was quantified by TEM and by ICP-AES. Cell cultures were exposed to a laser of a wavelength within the plasmon band of the gold nanoparticles (520 nm), and cell death was monitored by optical microscopy using the standard Trypan blue exclusion assay. The total energy transfer from the laser to the cell culture was estimated based on the extinction coefficient of the nanoparticles and also measured directly by UV-vis spectroscopy. Heating profiles for a range of laser intensities and exposure times were calculated. The temperature at which thermal cell death occurs was estimated by exposing the cells to a heated water bath and monitoring viability. Conditions were established to demarcate photothermal from photodynamic cell death, and a photodynamic mechanism was suggested based on the photochemical production of singlet oxygen. The plausibility of this mechanism was demonstrated by quantitative studies of singlet oxygen formation by laser irradiation of gold nanoparticles dispersed in water.
Mesoscopic analysis of online social networks - The role of negative ties
Creators: name: Esmailian, Pouya
name: Abtahi, Seyed Ebrahim
name: Jalili, Mahdi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: A class of networks are those with both positive and negative links. In this manuscript, we studied the interplay between positive and negative ties on mesoscopic level of these networks, i.e., their community structure. A community is considered as a tightly interconnected group of actors; therefore, it does not borrow any assumption from balance theory and merely uses the well-known assumption in the community detection literature. We found that if one detects the communities based on only positive relations (by ignoring the negative ones), the majority of negative relations are already placed between the communities. In other words, negative ties do not have a major role in detecting communities of studied signed networks. Moreover, regarding the internal negative ties, we proved that most unbalanced communities are maximally balanced, and hence they cannot be partitioned into k nonempty sub-clusters with higher balancedness (k >= 2). Furthermore, we showed that although the mediator triad ++- (hostile-mediator-hostile) is underrepresented, it constitutes a considerable portion of triadic relations among communities. Hence, mediator triads should not be ignored by community detection and clustering algorithms. As a result, if one uses a clustering algorithm that operates merely based on social balance, mesoscopic structure of signed networks significantly remains hidden.
description: 13 pages, 8 figures
title: Three-dimensional image classification using hierarchical spatial decomposition: A study using retinal data
Creators: name: Albarrak, Abdulrahman
Publisher: name: University of Liverpool Repository
Year: 2015

description: This thesis describes research conducted in the field of image mining especially volumetric image mining. The study investigates volumetric representation techniques based on hierarchical spatial decomposition to classify three-dimensional (3D) images. The aim of this study was to investigate the effectiveness of using hierarchical spatial decomposition coupled with regional homogeneity in the context of volumetric data representation. The proposed methods involve the following: (i) decomposition, (ii) representation, (iii) single feature vector generation and (iv) classifier generation. In the decomposition step, a given image (volume) is recursively decomposed until either homogeneous regions or a predefined maximum level are reached. For measuring the regional homogeneity, different critical functions are proposed. These critical functions are based on histograms of a given region. Once the image is decomposed, two representation methods are proposed: (i) to represent the decomposition using regions identified in the decomposition (region-based) or (ii) to represent the entire decomposition (whole image-based). The first method is based on individual regions, whereby each decomposed sub-volume (region) is represented in terms of different statistical and histogram-based techniques. Feature vector generation techniques are used to convert the set of feature vectors for each sub-volume into a single feature vector. In the whole image-based representation method, a tree is used to represent each image. Each node in the tree represents a region (sub-volume) using a single value and each edge describes the difference between the node and its parent node. A frequent sub-tree mining technique was adapted to identified a set of frequent sub-graphs. Selected sub-graphs are then used to build a feature vector for each image. In both cases, a standard classifier generator is applied, to the generated feature vectors, to model and predict the class of each image. Evaluation was conducted with respect to retinal optical coherence tomography images in terms of identifying Age-related Macular Degeneration (AMD). Two types of evaluation were used: (i) classification performance evaluation and (ii) statistical significance testing using ANalysis Of VAriance (ANOVA). The evaluation revealed that the proposed methods were effective for classifying 3D retinal images. It is consequently argued that the approaches are generic.
Cohesion regions - On the theory of world society in social geography
Zusammenhalts-Regionen – zur Theorie der Weltgesellschaft in der Sozialgeographie
Creators: name: Dirksmeier, Peter
name: Göb, Angelina
Publisher: name: Göttingen : Copernicus Publications
Year: 2021
Subjects: subject: cohesion
subject: detection method
subject: human geography
subject: Dewey Decimal Classification::900 | Geschichte und Geografie::910 | Geografie, Reisen
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::390 | Bräuche, Etikette, Folklore

description: The essay combines the concept of social cohesion with Rudolf Stichweh's system-theoretical concept of world society. These two approaches are joint hereafter with questions of spatial differentiation. The aim is to embed empirical micro-studies in macro-theoretical terms and to make them useful for empirical research in social geography. The construct of “cohesive region” demonstrates this by using the example of neighbourhoods.
title: Selective Laser Melting of Oxide Dispersion Strengthened Steels
Creators: name: Boegelein, Thomas
name: Rao, Ashwin
name: Jones, Andrew R
name: Tatlock, Gordon J
Publisher: name: University of Liverpool Repository
Year: 2015

description: Oxide Dispersion Strengthened (ODS) alloys are a long established class of materials manufactured using powder metallurgy techniques. These alloys can offer exceptional high temperature strength and resistance to radiation damage, thus are envisioned to be used in a number of future nuclear and fossil energy power applications. However, due to the manufacturing steps involved, the overall cost to build components with these materials can be high. This paper presents work conducted to assess the feasibility of applying Selective Laser Melting (SLM) techniques to either coat or direct build on substrates with Fe-based Oxide Dispersion Strengthened (ODS) alloys. SLM is a rapid prototyping technique which can be used to manufacture near net-shape solid components from layered metallic powder beds. Two different geometries were of interest in this study — a simple button configuration with a nickel-base superalloy (IN939) substrate and a more complex hexagonal shaped wall with a mild steel substrate. Powders of PM2000 (a FeCrAl based ODS alloy) were deposited in both cases. Heat treatments were subsequently conducted on these structures to investigate effects of temperature on the bond characteristics and secondary recrystallisation. Electron microscopy examination revealed significant amounts of diffusion between the nickel and the ODS powders which enhances the bond strength. The studies have revealed the existence of a strong bond between the substrate and the interface even after prolonged exposure at elevated temperatures.
Biogas-powered small power generation system designed for the agricultural sector to support the BCG model in Thailand
Creators: name: Panupon Trairat
name: Sakda Somkun
name: Tanakorn Kaewchum
name: Tawat Suriwong
name: Pisit Maneechot
name: Tanongkiat Kiatsiriroat
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2023
Subjects: Biogas
Self-Excited Induction Generator
Internal combustion engine
BCG model
Circular economy

description: Engineering and Applied Science Research, 50, 6, 548-560
title: The clergy of Cork, Cloyne and Ross during the Tudor reformations
Creators: name: Whitman, Michael
Publisher: name: University of Liverpool Repository
Year: 2015

description: This thesis challenges existing diocesan histories of Cork, Cloyne and Ross. Its local focus provides an invaluable opportunity to explore the successes and failures of the reformations in the region. The arguments are split into four chapters, which are divided between the upper and lower clerical orders, the secular and religious clergy, both before and during the eras of the Tudor reformations. The argument uses antiquarian sources, Irish annals and English state papers to narrate the formation of diocesan, parochial and monastic structures in the region. The quality of each is then assessed for both the late medieval and reformations periods, with direct reference to the effects of the peculiarities of Co. Cork’s religion upon the progress of reform. The thesis argues that the secular elites of Cork, Cloyne and Ross were intrinsically wedded to its church, involved heavily in the creation of the parish and monastic networks. Following the contraction of the crown polity in the medieval periods, local families took on increasing levels of influence. During the Tudor period, the crown sought to expand its power in the region. However, the agents of reform failed to engage with the Irish and Anglo-Norman elites. Instead, their work would be accomplished at the expense of the traditional political and religious structures. This failure was based in the pervasive economic and polical connections between the secular and religious elites of Co. Cork, but was reinforced by the particular weaknesses of the Anglican reformation strategy.
Effect of uncertainties in prediction models of shallow and deep foundations
Creators: name: Djeffal, Houcine
name: Laid Rouaski
name: Smain Belkacemi
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2023
Subjects: Reliability
Failure probability
Sensitivity
Foundation
Settlement
Bearing capacity

description: Engineering and Applied Science Research, 50, 6, 561-576
Correlation-based feature selection and Smote-Tomek Link to improve the performance of machine learning methods on cancer disease prediction
Creators: name: Lalu Ganda Rady Putra
name: Khairani Marzuki
name: Hairani Hairani
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2023
Subjects: Breast cancer prediction
Feature selection correlation
Machine learning methods
Hybrid Smote-Tomek Link

description: Engineering and Applied Science Research, 50, 6, 577-583
title: High spin spectroscopic studies of 156Ho: shape changes and band termination
Creators: name: Hampson, Peter
Publisher: name: University of Liverpool Repository
Year: 2015

description: High spin states in 156Ho have been populated through the 124Sn( 37 Cl, 5n)156Ho reaction at 177MeV as part of an experiment performed at the ATLAS facility of Argonne National Laboratory. A high statistics, high-fold γ-ray coincidence data set was collected with the GAMMASPHERE spectrometer array. Following a coincidence analysis 138 new transitions have been observed alongside a further 14 tentative transitions. A level scheme has been constructed building on previous work, which has been revised and considerably extended. A review of cranked shell model calculations, rotational alignments and B(M1)/B(E2) ratios of reduced transition probabilities has indicated that this nucleus is considerably soft with respect to triaxial deformation, which has facilitated in a reinterpretation of the configurations of four of the known bands. A further four new band structures have been identified, three of which exhibit behaviour characteristic of terminating bands. Within these structures two terminating states have been identified and valence-space interpretations have been associated with them that are consistent with known terminating bands in neighbouring nuclei. A third terminating configuration has been proposed but a corresponding terminating state has not yet been observed. An unusual backbend has been identified in a revised band structure. Following a review of nearby odd-odd nuclei it has been found that this behaviour may be systematic for odd-odd nuclei in the mass ∼160 region, however as of yet it defies a clear explanation, and therefore two possible interpretations have been presented.
A global-local defect/damage initiation and propagation model for launcher composite structures pre-sizing
Creators: name:  ALEXY TAILLEUR
name:   KEVIN MATHIS
name:   ANGE ROGANI
name:   PABLO NAVARRO
name:   STEVEN MARGUET
name:   JEAN-FRANCOIS FERRERO
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: FEM
COMPOSITES
SUBMODELING
PRE-SIZING
DAMAGE INITIATION
PROPAGATION
MATRIX CRACKS
DELAMINATION

description: This paper deals with the development of a numerical approach to study damage initiation in flawed launcher laminated composite structures during pre-sizing phase. It is realised through a novel 2D-3D top-down submodelling method adapted to large and complex composite structures. The aim of this numerical strategy is to address defects and damage as early as possible in the development stages of launcher composite structure. A new displacement interpolation based on a fourth order polynomial has been proposed and Kirchhoff-Love theory has been used in addition. Very accurate stress fields are obtained in the local area compared to a refined global model.
title: The Transition of Children with Special Education Needs From Nursery and Special Education Centres to the first school year In UAE Schools: Attitudes, Policies and Practices
titleType: Other
Creators: name: Ali, Hanan
Publisher: name: University of Dundee
Year: 2022

description: The transition of children from preschool to kindergarten is somehow similar to the first time children learn to go upstairs, where children are excited but afraid at the same time, looking for encouragement, perhaps a hand gently pushing them to hold the handrail and help them lift their feet off the ground with confidence until they can put it on the first stair, the children then realise they have succeeded and can continue to go up. In comparison, what would it be like for children with special needs in the same situation? Does the support of those around them depend on encouragement and a hand that gently pushes them, or do they need more than that!

As a result of a lack of research on this topic, this exploratory study investigates the transition of children with special education needs from preschool to kindergarten through the experience of parents, teachers, and children. The theoretical framework is based on the ecological systems theory by Bronfenbrenner. Firstly, data were collected by questionnaires completed by preschool and kindergarten teachers as a first phase; the posttransition stage was investigated in two case studies conducted by two private schools in Abu Dhabi employing a mixed-method approach. Data was extracted from semi-structured interviews with children, teachers, and administrators, while parents' experiences were extracted from parent surveys. In addition, classroom observation and document reviews were conducted.

Findings showed that despite efforts to provide appropriate inclusive education services in the Emirate of Abu Dhabi, the transition for children with special educational needs between different settings lacks adequate planning and coordination between the parties in the transition process. As a result, transition practices seem improvised and depend mainly on each school's policy. In addition, results indicate that teachers who receive students with special education needs face difficulties during the transition. These difficulties are caused by the lack of qualification, experience, and training in special education, which may affect the entire process. Finally, the study suggests that parents’ acceptance, transparency, and involvement play an essential role in facilitating the transition for children and their teachers. This study also provides recommendations for policy, practice, and future research. This study is considered one of the first studies that explored the transition to kindergarten from stakeholders’ point of view and could be the only study considering including children with SEN to the best of the researcher’s knowledge.
title: Exploring the role of nuclear phosphatases and their associated protein in cell growth and development
Creators: name: Duncalf, Louise
Publisher: name: University of Liverpool Repository
Year: 2015

description: Reversible protein phosphorylation is a key regulatory mechanism for controlling various cellular processes that determine cell fate. Phosphorylation status is controlled by kinases and phosphatases, which phosphorylate and dephosphorylate specific residues in target proteins respectively. Protein Phosphatase 1 (PP1) is a major serine/threonine phosphatase that is highly conserved in eukaryotes. Its catalytic subunit (PP1c) associates with numerous subunits that target and regulate its activity to specific subcellular localisations and substrates to define its role in various processes. PP1 Nuclear Targeting Subunit (PNUTS) is one of the most abundant regulatory subunits of PP1 in the nucleus. The aim of this work was to characterise a Drosophila orthologue of PNUTS and identify interacting proteins to further understand the role of PNUTS-PP1 in nuclear processes using various genetic and biochemical approaches. Mutational analysis revealed dPNUTS is essential for cell growth and survival as mutant animals die as 1st instar larvae and mutant cells are eliminated from developing tissues. PNUTS-PP1 co-localise on Drosophila polytene chromosomes, with many sites also marked by RNA Polymerase II (RNAPII). Biochemical analysis revealed Serine 5 of the C-terminal domain of RNAPII (CTD-Ser5) is a possible substrate of PP1-dPNUTS. Various RNAPII-dependent genes are misregulated in dPNUTS mutant animals, including genes involved in metabolic processes, most likely as a consequence of deregulated CTD-Ser5 phosphorylation. Another possible mechanism could be through regulation of histone modifications that determine gene expression patterns since clonal analysis revealed various histone marks are upregulated in dPNUTS and PP1 mutant cells. Methodologies to screen for regulatory enzymes affecting histone phosphorylation were also assessed. To further understand the role of dPNUTS in cell growth and development, a yeast two-hybrid approach together with biochemical analysis was used to identify dPNUTS interacting proteins. The top hit was dTOX4, the Drosophila homologue of LCP1/TOX4, which binds to PNUTS in humans. Mutational analysis revealed dTOX4 is essential for fertility in female and male adult flies. Homozygous mutant females displayed defects in nurse cell chromosome dispersal and abnormal dorsal-ventral patterning in the oocyte. Homozygous mutant males failed to complete spermatogenesis and exhibited a range of abnormal phenotypes in the testes, including defective cytokinesis, small nuclei, decondensed chromatin and Stellate crystal formation. Novel dPNUTS-interactors were also identified, which could offer further mechanistic insight into dPNUTS-PP1 function.
title: Development of radiation hard planar silicon tracking detectors for the ATLAS Experiment at the HL-LHC
Creators: name: Forshaw, Dean
Publisher: name: University of Liverpool Repository
Year: 2015

description: To extend the physics reach of the LHC, upgrades to the accelerator are planned which will increase the integrated annual luminosity by a factor of 10 (to 250 - 300 fb$^{-1}$/ year). This will increase the occupancy and the radiation damage of the inner trackers. To cope with the elevated occupancy, the ATLAS experiment plans to introduce an all silicon inner tracker for use during High Luminosity LHC (HL-LHC) operation. With silicon, the occupancy can be adjusted by using the appropriate pitch for the pixels/micro-strips. Constraints due to high radiation damage mean that only sensors with electrode configuration designed to read out the electron signal (n-in-p and n-in-n) are considered. The work presented within this thesis has been undertaken as part of the CERN-RD50 and ATLAS Upgrade collaborations. The main focus has been, firstly, on the development of radiation hard silicon detectors and the possible exploitation of the charge multiplication effect observed in irradiated silicon detectors that collect charge via electrons. Secondly, the production and optimisation of n-in-p planar pixel detectors designed specifically for ATLASs new Inner Tracker (ITk). The prototype sensors were produced by Micron Semiconductors Ltd, UK.
Development of a photon Monte Carlo radiative heat transfer solver for CFD applications
Creators: name:  GEORGII OBLAPENKO
name:   TOBIAS ECKER
name:   STEFAN FECHTER
name:   TIM HORCHLER
name:   SEBASTIAN KARL
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: RE-ENTRY
HYPERSONIC
RADIATION
MONTE CARLO
HEAT TRANSFER

description: Radiative heating can play an important role during atmospheric re-entry, combustion processes, and highenthalpy shock tunnel experiments. The present work details the development of a scalable photon Monte Carlo radiative heat transfer solver based on the open-source SPARTA DSMC code; its verification, coupling with the DLR FlowSimulator framework, and subsequent application.
Supplementary materials for the thesis: "Traditions and Innovations in Russian Poetry of the Second Half of the 1830s: A Quantitative Study"
Creators: name: Antonina Martynenko
Publisher: name: Zenodo
Year: 2024

description: The repository contains data and code used in the doctoral thesis Traditions and Innovations in Russian Poetry of the Second Half of the 1830s: A Quantitative Study.

The structure of the repository is as follows:

scr: contains folders for quarto or ipynb notebooks used for analysis in each chapter. The notebooks can be displayed directly on the Github via .md files;

data: includes all data used for the analysis (except for the proprietary data from the Russian National Corpus);

corpus_1835: the poetic corpus (poems published between 1835 and 1840) including texts and metadata built by me for this study. The structure of the corpus database is explained inside the folder.

NB An online user-friendly version of the corpus (with all metadata & bibliographies) is available online as a shiny-app.

-----------------------------

Abstract

Digital Humanities—a modern field where computers assist humanities research—once promised a revolution in literary studies. With digitisation and machine learning, it offered the chance to examine thousands of books in minutes, not years. But how can computers help analyse literary texts, and does access to a larger “library” allow us to rethink literary history?This dissertation addresses these questions focusing on a short under-studied period in Russian poetry: 1835 to 1840, considered the end of “the Golden Age”. Scholarly assessments of 1830s poetry vary: some describe these poems as ponderous copies of earlier exemplary texts, while others portray the 1830s poets as unskilled yet determined innovators who disrupted the “classical” poetic style.To reassess the place of the late 1830s poetry, this study compiled a large, unbiased corpus of 4,797 lyrical poems printed between 1835 and 1840. By analysing quantifiable features of poems, such as word frequencies and rhyme endings statistics, the dissertation asks which changes in the poetic language are traceable on the level of “poetic population”.Data reveals both innovation and retention in the poetry of this period. On the one hand, the poetry of the mid- and late 1830s is different enough from earlier texts on formal levels: an algorithm can distinguish 1830s texts based on word, meter, or rhyme frequencies. In other words, these poems are far from mere imitations. On the other hand, certain features of poetic style remain conservative, such as the poetic genres and their connections to specific meters.Thus, the truth lies somewhere between the contrasting opinions about this period in poetic history: neither did the 1830s poets blindly imitate the past, nor did they disrupt the “Golden age's” legacy. Similarly, while studying a larger corpus computationally doesn't bring about a revolution, statistical reasoning at the population level can provide a stable ground for further humanities inquiry.
A Robust Transformation-Based Learning Approach Using Ripple Down Rules for Part-of-Speech Tagging
Creators: name: Nguyen, Dat Quoc
name: Nguyen, Dai Quoc
name: Pham, Dang Duc
name: Pham, Son Bao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this paper, we propose a new approach to construct a system of transformation rules for the Part-of-Speech (POS) tagging task. Our approach is based on an incremental knowledge acquisition method where rules are stored in an exception structure and new rules are only added to correct the errors of existing rules; thus allowing systematic control of the interaction between the rules. Experimental results on 13 languages show that our approach is fast in terms of training time and tagging speed. Furthermore, our approach obtains very competitive accuracy in comparison to state-of-the-art POS and morphological taggers.
description: Version 1: 13 pages. Version 2: Submitted to AI Communications - the European Journal on Artificial Intelligence. Version 3: Resubmitted after major revisions. Version 4: Resubmitted after minor revisions. Version 5: to appear in AI Communications (accepted for publication on 3/12/2015)
MOLIYAVIY HISOBOTNING XALQARO STANDARTLARI ASOSIDA MOLIYAVIY HISOBOTLARNI TUZISH TARTIBI HAQIDA
Creators: name: Davronov, Nodirbek
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada O'zbekistonda moliyaviy hisobotlarning xalqaro standartlari asosida moliyaviy hisobotlarni tizishtartibi, uning amaliyotda qo'llanilishi, moliyaviy hisobotlarning xalqaro standartlariga o'tishdagidagi muammolar va ularni bartaraf etish yo'llarining amaliytahlili keltirilgan.
title: Implications of theTriple Helix Model in Peshawar, Pakistan a case study of the Entrepreneurship Development Centre (EDC) IMSciences
Creators: name: Khan, Romy
Publisher: name: University of Liverpool Repository
Year: 2015

description: The study aims to explore existing university-industry-government linkages in Peshawar, Pakistan and study the factors that determine these linkages. Furthermore, the research examines the extent to which university-industry-government collaboration can address regional industrial problems and promote economic growth. Hence, the quest is to seek a model that not only enhances innovation in the region but also improves industrial competitiveness. Therefore, Etzkowitz’s Triple Helix model, based on academia-industry-government collaboration, provides the intellectual context for this research. As universities have a crucial role to promote innovation and stimulate economic development, the study begins by examining the different roles that emerge in different areas. In this regard, the university’s traditional role of teaching and education has evolved to the present focus on knowledge production. Secondly, a systematic literature review is undertaken of studies in developed, developing and newly developed countries to examine how the Triple Helix model is operationalised in these regions. The literature review then guided the primary research which examines how the model could work in Peshawar, Pakistan. Primary data were collected with the aim of establishing the extent to which university-industry-government linkages existed in the region. A case study of the Entrepreneurship Development Centre (EDC) at IMSciences was selected because the centre had already initiated U-I-G linkages to some extent in Peshawar. The study uses semi-structured interviews and a narrative approach; with descriptive and analytical approaches to investigate the nature of university-industry and government linkages in Peshawar. Research findings suggest that university-industry-government linkages are too weak. Moreover, the EDC needs funds to sustain its activities; government level support for research funds and industrial recognition of the centre’s potential as a well-developed mechanism for U-I-G linkages. Furthermore, the Triple Helix model cannot be implemented in its original form for many reasons. To overcome these challenges, the study recommends that the EDC should first develop strategic partnerships with government and industry that could be mutually beneficial. IMSciences through EDC should adopt the third mission of academia, i.e. innovation-based economic development and should engage in research and development that transforms the region into a knowledge-based economy. The model must be modified to make it functional in Peshawar. The Small and Medium Enterprise authority (SMEDA) should be included as an intermediary in bridging the gap among university-industry-government collaboration. Moreover, a more conscious, evolutionary approach is recommended for the implementation of the model in Peshawar.
On the complexity of computing Gröbner bases for weighted homogeneous systems
Creators: name: Faugère, Jean-Charles
name: Din, Mohab Safey El
name: Verron, Thibaut
Publisher: name: arXiv
Year: 2014
Subjects: subject: Symbolic Computation (cs.SC)
subject: FOS: Computer and information sciences

description: Solving polynomial systems arising from applications is frequently made easier by the structure of the systems. Weighted homogeneity (or quasi-homogeneity) is one example of such a structure: given a system of weights $W=(w\_{1},\dots,w\_{n})$, $W$-homogeneous polynomials are polynomials which are homogeneous w.r.t the weighted degree $°\_{W}(X\_{1}^{α\_{1}},\dots,X\_{n}^{α\_{n}}) = \sum w\_{i}α\_{i}$. Gröbner bases for weighted homogeneous systems can be computed by adapting existing algorithms for homogeneous systems to the weighted homogeneous case. We show that in this case, the complexity estimate for Algorithm~\F5 $\left(\binom{n+\dmax-1}{\dmax}^ω\right)$ can be divided by a factor $\left(\prod w\_{i} \right)^ω$. For zero-dimensional systems, the complexity of Algorithm~\FGLM $nD^ω$ (where $D$ is the number of solutions of the system) can be divided by the same factor $\left(\prod w\_{i} \right)^ω$. Under genericity assumptions, for zero-dimensional weighted homogeneous systems of $W$-degree $(d\_{1},\dots,d\_{n})$, these complexity estimates are polynomial in the weighted Bézout bound $\prod\_{i=1}^{n}d\_{i} / \prod\_{i=1}^{n}w\_{i}$. Furthermore, the maximum degree reached in a run of Algorithm \F5 is bounded by the weighted Macaulay bound $\sum (d\_{i}-w\_{i}) + w\_{n}$, and this bound is sharp if we can order the weights so that $w\_{n}=1$. For overdetermined semi-regular systems, estimates from the homogeneous case can be adapted to the weighted case. We provide some experimental results based on systems arising from a cryptography problem and from polynomial inversion problems. They show that taking advantage of the weighted homogeneous structure yields substantial speed-ups, and allows us to solve systems which were otherwise out of reach.
Reciprocity in directed networks
Creators: name: Yin, Mei
name: Zhu, Lingjiong
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Reciprocity is an important characteristic of directed networks and has been widely used in the modeling of World Wide Web, email, social, and other complex networks. In this paper, we take a statistical physics point of view and study the limiting entropy and free energy densities from the microcanonical ensemble, the canonical ensemble, and the grand canonical ensemble whose sufficient statistics are given by edge and reciprocal densities. The sparse case is also studied for the grand canonical ensemble. Extensions to more general reciprocal models including reciprocal triangle and star densities will likewise be discussed.
description: 26 pages, 3 figures
Identidad y resistencia indígena en la conquista y colonización del Oriente de Venezuela (1498-1810). II Tomos
Creators: name: Tiapa Blanco, Francisco Daniel
Publisher: name: Zenodo
Year: 2004

description: Abstract: 

The indigenous resistance to Spanish domination in Eastern Venezuela during the colonial period was closely tied to the dynamics of identity construction among its inhabitants. These identities were expressed through the formation of alliances, either to oppose or cooperate with the Europeans. These alliances, in turn, were shaped by systems of interethnic relations, which were also structured by communication networks and trade exchanges. These networks were transformed by the imposition of new forms of territorial and social organization, particularly with the settlement of missions throughout the three centuries of colonization. This work presents a diachronic reconstruction of the transformation of these systems of relations and the processes of ethnic identity construction, as forms of resistance by the indigenous peoples of Eastern Venezuela, which evolved according to the different forms of colonial imposition. 

Resumen: 

La resistencia indígena, a la dominación hispana del Oriente de Venezuela durante la época colonial, estuvo estrechamente vinculada con las dinámicas de construcción de identidades de sus habitantes, expresadas por medio de la conformación de sistemas de alianzas para oponerse o para cooperar con los europeos. Estas alianzas estuvieron definidas, a su vez, por sistemas de relaciones interétnicas estructurados, además, por redes de comunicación e intercambios comerciales, las cuales fueron transformadas por la imposición de nuevas formas de organización de sus territorios y espacios sociales, con el poblamiento en las misiones a lo largo de los tres siglos de colonización. En este trabajo se presenta una reconstrucción del proceso diacrónico de transformación de estos sistemas de relaciones y de sus juegos de construcción de identidades étnicas, como formas de resistencia de los de los pueblos indígenas del Oriente de Venezuela, cambiantes según las distintas formas de imposición colonial.
Modeling of polyatomic gas flows within a kinetic Fokker-Planck approach using a direct modeling method
Creators: name:  AARON NAGEL
name:   LEO BASOV
name:   MARTIN GRABE
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: DSMC
FOKKER-PLANCK
RAREFIED FLOWS

description: To provide a significant speedup in modeling rarefied gas flows, the collision operator in the Boltzmann equation is approximated by a Fokker-Planck operator in velocity space. A polyatomic extension of the diatomic direct modeling approach in the Fokker-Planck framework is presented in this paper. The model extension is verified by a code to code comparison, using DSMC data of the SPARTA code and PICLas code. The relaxation of the temperature for different timestep size and runtime efficiency for small Knudsen numbers are investigated. The diatomar relaxation process of the temperature using N2 show very good agreement with the reference data, including the expectation of a larger noise. The polyatomic relaxation process of the temperature are investigated using CO2 and CH4 . In both cases our model predicts the equilibrium temperature correctly, whereas deviations in the temporal relaxations are observed. The comparisons with larger timestep sizes show only small deviations and the advantage in runtime of the direct Fokker-Planck modeling compared to DSMC for small Knudsen number is shown.
The homology of the Higman-Thompson groups
Creators: name: Szymik, Markus
name: Wahl, Nathalie
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: We prove that Thompson's group $V$ is acyclic, answering a 1992 question of Brown in the positive. More generally, we identify the homology of the Higman-Thompson groups $V_{n,r}$ with the homology of the zeroth component of the infinite loop space of the mod $n-1$ Moore spectrum. As $V = V_{2,1}$, we can deduce that this group is acyclic. Our proof involves establishing homological stability with respect to $r$, as well as a computation of the algebraic K-theory of the category of finitely generated free Cantor algebras of any type $n$.
description: 49 pages