cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Morphology, Structure, and Enhanced Intramolecular Conduction in Ultralong Conjugated Polymer Brushes
Creators: name: Yablonski, J.D.
name: Delongchamp, D.M.
name: You, W.
name: Tsui, F.
name: Locklin, J.
name: Lajoie, T.W.
name: Vonwald, I.A.
name: Moog, M.M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: The morphological, structural, and electrical properties of poly(3-methylthiophene) polymer brush films grown on indium tin oxide up to 120 nm thick are reported. Optical spectroscopy experiments indicate that the average orientation of polymer chains is nearly isotropic at thicknesses below 10 nm and above 30 nm, and exhibits mild vertical anisotropy in between. Atomic force microscopy shows that the film surfaces consist of column-shaped domains with an average cross-sectional area (2.3 × 10-3 μm2) and density (200 μm-2) that are independent of film thickness. Analysis of the contact between printed Au electrodes and the polymer brush film shows that a small fraction of the film surface (i.e., the tallest columns) makes contact with the electrodes. The measured bulk resistivity along the columns is 1.4 × 105 Ω·cm, 2 orders of magnitude lower than typical values for spuncast poly(3-alkylthiophene) films, while the resistance along individual polymer chains in the columns is estimated to be 360 GΩ/nm per molecule, comparable to molecular wires that exhibit charge transport by intramolecular processes. The enhanced conduction is likely due to additional intramolecular transport pathways enabled by the electrode-polymer brush-electrode device architecture, establishing conjugated polymer brushes as a platform for studying the interplay among synthesis, morphology, and charge transport phenomena.
title: Anatomy and pathology of the pontocerebellar fibers in patients with paramedian pontine infarct demonstrated with MRI and DTI
Creators: name: Traylor, Katie
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Pathology
subject: Ischaemia / Infarction
subject: Education and training
subject: Education
subject: Neural networks
subject: MR-Diffusion/Perfusion
subject: MR
subject: Neuroradiology brain
subject: Anatomy

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Discuss the anatomy of the pontocerebellar fibers (PCF) and post-ischemic wallerian degeneration (WD) of PCF utilizing diffusion tensor imaging...
(101876) Sophia R Thurmer
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Tabla Descripción de Tecnologías Habilitadoras para la Transformación Digital (THD)
Creators: name: Stable-Rodríguez, Yudayly
name: Díaz-Chieng, Lee Yang
name: Pérez Gamboa, Alfredo Javier
Publisher: name: Zenodo
Year: 2024

description: Material complementario utilizado para la elaboración de la propuesta titulada Evaluación bibliométrica de la investigación sobre Tecnologías Habilitadoras para la Transformación Digital (THD) en Cuba, donde se presenta un análisis de las principales tendencias en cuanto a la investigación sobre dichas tecnologías.

Estas tendencias fueron diagnosticadas mediante un diseño que combinó indicadores y técnicas para el mapeo de la producción científica en este campo particular. Debido a que varios autores exponen sus consideraciones sobre cuáles son las THD, algunos consideran la existencia de 9 THD mientras que otros consideran que son 12, en este estudio se utilizaron a partir de la convergencia de las definiciones entre ellas
title: PITFALLS IN NEUROIMAGING: What the radiologist should know.
Creators: name: Granados, Ana
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Neuroradiology brain
subject: CNS
subject: MR-Functional imaging
subject: MR-Diffusion/Perfusion
subject: MR-Spectroscopy
subject: Diagnostic procedure
subject: Technical aspects
subject: Computer Applications-Detection, diagnosis
subject: Image verification
subject: Education and training

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review the clinical indications, technical considerations, and pitfalls that should be considered in the acquisition, processing, and interpretation of the advanced MR images: magnetic resonance spectroscopy (MRS), diffusion tensor imaging...
Imaging Carrier Diffusion in Perovskites with a Diffractive Optic-Based Transient Absorption Microscope
Creators: name: Moran, A.M.
name: Zhou, N.
name: Williams, O.F.
name: Guo, Z.
name: Hu, J.
name: You, W.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: Carrier diffusion is imaged in a perovskite film and crystal using a newly developed transient absorption microscope. Wide-field imaging is combined with a diffractive optic-based beam geometry to conduct 41 transient absorption experiments in parallel in this experimental setup. This configuration allows statistics to be quickly compiled with a 1 kHz laser system. Diffusion coefficients of 0.01 and 0.20 cm2/s are obtained for the methylammonium lead iodide film and crystal, respectively. Our data suggest that the dynamics in the film are dominated by intensity dependence of the carrier lifetimes as opposed to carrier diffusion. The small diffusion coefficients determined in the film are attributed to the presence of grain boundaries.
Enhancing the performance of the electron acceptor ITIC-Th via tailoring its end groups
Creators: name: Zhan, X.
name: Wu, Y.
name: Xin, J.
name: Zhao, F.
name: You, W.
name: Wang, C.
name: Zhang, L.
name: Ma, W.
name: Dai, S.
name: Li, T.
name: Liu, Q.
name: Liu, K.
name: Rech, J.
name: Li, Z.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: We choose the high-performance nonfullerene acceptor ITIC-Th as an example, and incorporate electron-donating methoxy and electron-withdrawing F groups onto the terminal group 1,1-dicyanomethylene-3-indanone (IC) to construct a small library of four fused-ring electron acceptors. With this series, we systematically investigate the effects of the substituents on the end-groups on the electronic properties, charge transport, film morphology, and photovoltaic properties of the ITIC-Th series. The electron-withdrawing ability increases from methoxylated to unsubstituted, fluorinated, and difluorinated IC, leading to a downshift of energy levels and a redshift of absorption spectra. Optimized organic solar cells based on the ITIC-Th series show power conversion efficiencies ranging from 8.88% to 12.1%.
title: AN ANALYSIS OF THE CURRENT LEGAL FRAMEWORK FOR SOCIAL HOUSING IN ENGLAND AND WALES AND THE APPLICATION OF MORAL DESERT
Creators: name: Hood-Fredriksen, Malavai
Publisher: name: University of Liverpool Repository
Year: 2022

description: The central contention of this thesis is the current method used by the legal framework uses the concept of a philosophical, moral desert in order to determine eligibility for social housing. It will argue that using such a concept to classify social housing eligibility is flawed for three reasons. Firstly, because it introduces the idea that housing is a reward. Secondly, because where housing is being used as a reward for the deserving, there will be questions about an applicant’s worth that takes such judgements beyond the idea of eligibility and into areas of morality. This has allowed the development of increasingly sophisticated tools used to determine a candidate’s worth that are continuously assessed throughout the lifetime of the tenancy. Thirdly, because of its intrinsic links to ideas of fairness and of societal notions of right and wrong, where people getting what they deserve is seen as a form of justice, there is a sense that this system is also just. In other words, when someone who is unworthy is potentially made homeless by refusal of the greatest housing duty, this is somehow justice. In order to support this argument, this thesis will present a case study that aims highlight the impact of the changes to the legal framework by examining vulnerable tenants. The aim is to paint a more complete picture for this group, demonstrating the issues of using housing as a reward, and a detailed assessment of a candidate’s worth.
title: Reduction of the Radiation Dose and the Amount of Contrast Material in Hepatic Dynamic CT with Low Tube Voltage and AIDR 3D
Creators: name: Nakamoto, Atsushi
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Cirrhosis
subject: Comparative studies
subject: CT
subject: Liver
subject: Abdomen

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Low tube voltage CT increases the x-ray absorption of iodine, and can improve the iodine enhancement of vascular and parenchymal structures [1, 2]. Moreover, radiation dose can be reduced by this technique. However, the increase of image noise may...
title: Distributed Monitoring For Intrusion Detection In Clouds
Creators: name: Alshamrani, SS
Publisher: name: University of Liverpool Repository
Year: 2017

description: This thesis is in the field of Computer Science. More precisely, its main research themes are in the applied part of the field Cloud Computing. The main focus in this work is on monitoring of cloud systems in a distributed fashion. This work is a natural continuation of previous studies on discovering the symptoms malicious behaviours in cloud systems. Our line of research is based on efficient discovery of the symptoms of threats. This challenge is met through the design and analysis of new algorithms carrying out this job. Several algorithms are studied. First, a simplified version of previously studied Mobility algorithm is proposed. The new algorithm is named Reduce-Max algorithm. This algorithm is analysed on eight different data sets. Then two modifications of Reduce-Max algorithm are considered. The first one is called Randomised-Local Reduction and the second one is Deterministic-Centralised Reduction. Further, the algorithms are tested under different models of symptoms appearance. The work continues with studies of Reduce-Max and its two modifications in hierarchical systems, which concludes in the design of a new algorithm, called Random-Start-Round-Robin. Finally, this thesis concludes with work on balancing Mobility Algorithm. An integral part of my PhD work are experiments of proposed algorithms where the emphasis is on proper modeling of monitoring of cloud systems. Further discussion is based on the results of these experiments reflected in the final conclusions.
(101879) Catherine Tollervey
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
title: Intrusion Detection and Prevention Systems In the Cloud Environment
Creators: name: Abdulazeez, MB
Publisher: name: University of Liverpool Repository
Year: 2017

description: Cloud computing provides users with computing resources on demand. Despite the recent boom in adoption of cloud services, security remains an important issue. The aim of this work is to study the structure of cloud systems and propose a new security architecture in protecting cloud against attacks. This work also investigates auto-scaling and how it affects cloud computing security. Finally, this thesis studies load balancing and scheduling in cloud computing particularly when some of the workload is faulty or malicious. The first original contribution proposes a hierarchical model for intrusion detection in the cloud environment. Finite state machines (FSM) of the model were produced and verified then analyzed using probabilistic model checker. Results indicate that given certain conditions the proposed model will be in a state that efficiently utilize resources despite the presence of attack. In this part of work how cloud handles failure and its relationship to auto-scaling mechanisms within the cloud has been investigated. The second original contribution proposes a lightweight robust scheduling algorithm for load balancing in the cloud. Here some of the traffic is not reliable. Formal analysis of the algorithm were conducted and results showed that given some arrival rates of both genuine and malicious traffic average queues will stabilize, i.e. they will not grow to infinity. Experimental results studied both queues and latency, and they showed that under the same conditions naive algorithms do not stabilize. The algorithm was then extended to decentralized settings where servers maintain separate queues. In this approach when a job arrives, a dispatching algorithm is used to decide which server to send it to. Different dispatching algorithms were proposed and experimental results indicate that the new algorithms perform better than some of the existing algorithms. The results were further extended to heterogeneous (servers with different configuration) settings and it was shown that some algorithms that were stable in homogeneous setting are not stable under this setting. Simulations monitoring queue sizes confirmed that some algorithms which are stable in homogeneous setting, are not stable under this setting. It is hoped that this study with inform and enlighten cloud service providers about new ways to improve the security of the cloud in the presence of failure/attacks.
Experiment Description Document - Surveyor Lunar Roving Vehicle Topographic Mapping
Creators: name: U.S. Geological Survey
Publisher: name: U.S. Geological Survey
Year: 1964
Subjects: Apollo, Astronaut Training

description: This document is part of the Functional Specifications for the Topographic Mapping Experiment to be carried out by the Surveyor Lunar Roving Vehicle. It includes a description of the experiment along with the accuracies required for meaningful results.
title: Aspect of perfusion CT in space occupying lezions of brain
Creators: name: Szabo, Timea
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Neuroradiology brain
subject: Oncology
subject: Professional issues
subject: CT
subject: MR-Angiography
subject: Computer Applications-Detection, diagnosis
subject: Staging
subject: Haemodynamics / Flow dynamics
subject: Metastases
subject: Neoplasia

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: - defining perfusion CT (PCT) - role of PCT - what can PCT detect -why should it be...
FLUXO DE CARGA ÓTIMO APLICADO À REDE DE TRANSMISSÃO HÍBRIDA CA/CC: UMA ANÁLISE HEURÍSTICA POR MEIO DO MÉTODO PSO
Creators: name: Ginúbio Braga Ferreira
Publisher: name: Zenodo
Year: 2023

description: O objetivo principal deste pré-projeto é estudar o problema de fluxo de carga ótimo aplicado à uma rede de transmissão híbrida CA/CC proposta, baseado nos métodos iterativos convencionais e com aplicação de um método heurístico (PSO) para solução do problema de FCO.
title: Content-based image retrieval (CBIR) based computer aided diagnosis (CAD) for evaluation of lung nodules: an indigenously developed tool assisting radiologists in self-learning and diagnosis of lung cancer
Creators: name: GARG, MANDEEP
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Lung
subject: CT-High Resolution
subject: Computer Applications-Detection, diagnosis
subject: Cancer

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The aim of this study was to create an image database of lung nodules on chest CT and development of CBIR-based CAD system which can act as a learning tool and assist the radiologist in the diagnosis of lung...
(101873) Henry Thurmer
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
A carbon-oxygen-bridged hexacyclic ladder-type building block for low-bandgap nonfullerene acceptors
Creators: name: Rech, J.J.
name: Ding, L.
name: Li, T.
name: Zhang, H.
name: Niu, H.
name: Xiao, Z.
name: You, W.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: A hexacyclic carbon-oxygen-bridged ladder-type unit, COi6, was developed. Three nonfullerene acceptors (COi6IC, COi6FIC and COi6DFIC) based on COi6 were prepared. They present low optical bandgaps of 1.31-1.37 eV and strong absorbance in the near-infrared region. A 9.12% power conversion efficiency was achieved from the solar cells based on COi6FIC and a wide-bandgap copolymer donor (FTAZ).
Tunable Semiconductors: Control over Carrier States and Excitations in Layered Hybrid Organic-Inorganic Perovskites
Creators: name: You, W.
name: Du, K.-Z.
name: Blum, V.
name: Dirkes, D.
name: Mitzi, D.B.
name: Kanai, Y.
name: Vazquez-Mayagoitia, A.
name: Liu, C.
name: Huhn, W.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: For a class of 2D hybrid organic-inorganic perovskite semiconductors based on π-conjugated organic cations, we predict quantitatively how varying the organic and inorganic component allows control over the nature, energy, and localization of carrier states in a quantum-well-like fashion. Our first-principles predictions, based on large-scale hybrid density-functional theory with spin-orbit coupling, show that the interface between the organic and inorganic parts within a single hybrid can be modulated systematically, enabling us to select between different type-I and type-II energy level alignments. Energy levels, recombination properties, and transport behavior of electrons and holes thus become tunable by choosing specific organic functionalizations and juxtaposing them with suitable inorganic components.
(101875) Frederick Thurmer
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
The Curious Case of Fluorination of Conjugated Polymers for Solar Cells
Creators: name: Zhang, Q.
name: You, W.
name: Bauer, N.
name: Kelly, M.A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: ConspectusOrganic solar cells (OSCs) have been a rising star in the field of renewable energy since the introduction of the bulk heterojunction (BHJ) in 1992. Recent advances have pushed the efficiencies of OSCs to over 13%, an impressive accomplishment via collaborative efforts in rational materials design and synthesis, careful device engineering, and fundamental understanding of device physics. Throughout these endeavors, several design principles for the conjugated donor polymers used in such solar cells have emerged, including optimizing the conjugated backbone with judicious selection of building blocks, side-chain engineering, and substituents. Among all of the substituents, fluorine is probably the most popular one; improved device characteristics with fluorination have frequently been reported for a wide range of conjugated polymers, in particular, donor-acceptor (D-A)-type polymers. Herein we examine the effect of fluorination on the device performance of solar cells as a function of the position of fluorination (on the acceptor unit or on the donor unit), aiming to outline a clear understanding of the benefits of this curious substituent.As fluorination of the acceptor unit is the most adopted strategy for D-A polymers, we first discuss the effect of fluorination of the acceptor units, highlighting the five most widely utilized acceptor units. While improved device efficiency has been widely observed with fluorinated acceptor units, the underlying reasons vary from case to case and highly depend on the chemical structure of the polymer. Second, the effect of fluorination of the donor unit is addressed. Here we focus on four donor units that have been most studied with fluorination. While device-performance-enhancing effects by fluorination of the donor units have also been observed, it is less clear that fluorine will always benefit the efficiency of the OSC, as there are several cases where the efficiency drops, in particular with "over-fluorination", i.e., when too many fluorine substituents are incorporated.Finally, while this Account focuses on studies in which the polymer is paired with fullerene derivatives as the electron accepting materials, non-fullerene acceptors (NFAs) are quickly becoming key players in the field of OSCs. The effect of fluorination of the polymers on the device performance may be different when NFAs are used as the electron-accepting materials, which remains to be investigated. However, the design of fluorinated polymers may provide guidelines for the design of more efficient NFAs. Indeed, the current highest-performing OSC (∼13%) features fluorination on both the donor polymer and the non-fullerene acceptor.
Polyrachis (Myrma) bequaerti
Creators: name: Santschi, F.
Publisher: name: Zenodo
Year: 1923
Subjects: Biodiversity
Taxonomy
Polyrachis
Polyrachis bequaerti

description: Polyrachis (Myrma) bequaerti Wheeler.
[[queen]] (non decrite) Long. 6,5 mm. Couleur, pilosite comme chez la. [[worker]]. Le pronotum rugueux, non strie. Les stries des mesonotum et scutellum longitudinales et plus fortes que chez la [[worker]]. Metanotum en bourrelet transversal, enfonce, lisse, et luisant. Les stries de la face basale de l'epinotum divergent en arriere et en dehors, celles de la face declive sont concentriques a concavite inferieure. Le gastre plus luisant, pour le reste comme la [[worker]].
Congo belge: Kunungu 5 - IV- 1921 1 [[worker]] (type); Mayumbe, Makaia Ntete 11 - 30 - III- 1922; Kasai, Ngombe, 7 - XI- 1921, 1 [[worker]]. (Dr. Schou-teden) (Mus. Tervueren).
description: Published as part of Santschi, F., 1923, Descriptions de nouveaux formicides Ethiopiens et notes diverses. - I., pp. 259-295 in Revue de Zoologie Africaine 11 on page 294
A Ladder-type Heteroheptacene 12H-Dithieno[2′,3′:4,5]thieno[3,2-b:2′,3′-h]fluorene Based D-A Copolymer with Strong Intermolecular Interactions toward Efficient Polymer Solar Cells
Creators: name: Zhang, S.
name: You, W.
name: Wu, J.
name: Wang, W.
name: Yang, M.
name: Gao, J.
name: Lu, X.
name: Lau, T.-K.
name: Xiao, S.
name: Zhan, C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Ladder-type electron-donating units for D-A copolymers applied in polymer solar cells usually comprise multiple tetrahedral carbon bridges bonded with out-of-plane alkyl chains for desirable solubility for device processing. However, molecular packing of resultant copolymers in the solid state and charge transport within devices are also impeded in spite of with multiple fused aromatic backbones. To mitigate this issue, a structurally well-defined ladder-type electron-donating heteroheptacene, 12H-dithieno[2′,3′:4,5]thieno[3,2-b:2′,3′-h]fluorene (DTTF) with an extended conjugated backbone and a single tetrahedral carbon bridge attached with two bulky alkyl chains was designed and synthesized. The copolymerization of DTTF with 4,7-bis(4-hexylthiophen-2-yl)benzo[c][1,2,5]thiadiazole (DTBT) afforded a soluble D-A copolymer (PDTTF-DTBT) with a medium optical band gap of 1.72 eV and low-lying HOMO level at -5.36 eV. PDTTF-DTBT unprecedentedly exhibits strong intermolecular stacking ability and presents preferential face-on orientation on both ZnO and PEDOT:PSS layers. The improved packing order and appropriate phase separation of both the copolymer and PC71BM in the bulk heterojunction blend on the ZnO layer over on the PEDOT:PSS layer lead to much improved power conversion efficiency of ∼8.2% in the inverted solar cell device, among the highest for reported ladder-type D-A copolymers. The research demonstrates that it is an effective method to incorporate a single tetrahedral carbon bridge to the molecular center of a ladder-type heteroacene with heavily extended π-conjugation to prepare D-A copolymers toward highly efficient PSCs.
title: Acute pancreatitis: a pictorial review
Creators: name: Tarcău, Paul
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Pancreas
subject: CT
subject: MR
subject: Ultrasound
subject: Diagnostic procedure
subject: Education
subject: Structured reporting
subject: Education and training
subject: Inflammation
subject: Acute

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To review the diagnostic and staging criteria for acute pancreatitis according to the 2012 revised Atlanta classification of acute pancreatitis in adults. To exemplify through a series of cases the imaging timing and features of acute...
Fluorination of Donor-Acceptor Copolymer Active Layers Enhances Charge Mobilities in Thin-Film Transistors
Creators: name: Ade, H.
name: So, F.
name: Liu, S.
name: Klump, E.
name: Yan, L.
name: Zhang, Q.
name: Jiao, X.
name: Peng, Z.
name: You, W.
name: Rech, J.J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Several recent reports have demonstrated that fluorinated analogues of donor/acceptor copolymers surpass nonfluorinated counterparts in terms of performance in electronic devices. Using a copolymer series consisting of fluorinated, partially fluorinated, and nonfluorinated benzotriazole, we confirm that the addition of fluorine substituents beneficially impacts charge transport in polymer semiconductors. Transistor measurements demonstrated a factor of 5 increase in carrier mobilities with the degree of fluorination of the backbone. Furthermore, grazing-incidence X-ray diffraction data indicates progressively closer packing between the conjugated cores and an overall greater amount of π-stacking in the fluorinated materials. It is likely that attractive interactions between the electron-rich donor and fluorinated electron-deficient acceptor units induce very tightly stacking crystallites, which reduce the energetic barrier for charge hopping. In addition, a change in crystallite orientation was observed from primarily edge-on without fluorine substituents to mostly face-on with fluorinated benzotriazole.
title: The human immune response to oral vaccination with live-attenuated Salmonella Typhi (Ty21a)
Creators: name: Pennington, SH
Publisher: name: University of Liverpool Repository
Year: 2017

description: Typhoid fever continues to represent a significant threat to global health and currently licensed vaccines confer incomplete protection. In 1975, an oral typhoid vaccine was developed through the chemical mutagenesis of pathogenic Salmonella enterica serovar Typhi strain Ty2. This vaccine, which is designated Ty21a, has been used for many years to combat disease; it is well-tolerated with a cumulative efficacy of approximately 58% up to 2 years following its administration. A great deal of data have been collected concerning peripheral cellular and humoral immune responses to this vaccine; however, only surrogate measures of mucosal immunity exist. The data presented within this thesis demonstrate the value of direct mucosal sampling and provide fresh insight into aspects of human immunity which have not previously been explored. The data presented describe the strength, diversity and duration of mucosal and peripheral cellular immune responses to Ty21a. In addition, the data demonstrate the wider impact of Ty21a on responses to non-related pathogens. Data presented here support the use of direct mucosal sampling to study host-pathogen interaction and the development of S. Typhi based vectors.
(101877) Horatio Nelson Tollervey
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
title: Quality assurance in breast cancer screening: identifying radiologist’s underperformance
Creators: name: Guma Martinez, Anna
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Breast
subject: Mammography
subject: Screening
subject: Quality assurance

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: In most health care systems, a consensus is emerging that there is a need for quality measures. Several guidelines have developed a set of core indicators for quality assurance in breast cancer screening. However, the quality standards refer...
(101872) Samuel Holmes
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Panchromatic Sequentially Cast Ternary Polymer Solar Cells
Creators: name: Yan, L.
name: Gadisa, A.
name: Zhang, Q.
name: Ghasemi, M.
name: Ye, L.
name: Kim, J.-H.
name: Ade, H.
name: Awartani, O.
name: You, W.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: In this report, a high-performance all-polymer organic photodetector that is sensitive to linearly polarized light throughout the visible spectrum is demonstrated. The active layer is a bulk heterojunction composed of an electron donor polymer PBnDT-FTAZ and acceptor polymer P(NDI2OD-T2) that have complementary spectral absorption resulting in efficient detection from 350 to 800 nm. The blend film exhibits good ductility with the ability to accommodate large strains of over 60% without fracture. This allows the film to undergo large uniaxial strain resulting in in-plane alignment of both polymers making the film optically anisotropic and intrinsically polarization sensitive. The films are characterized by UV–vis spectroscopy and grazing incidence wide-angle X-ray scattering showing that both polymers have similar in-plane backbone alignment and maintain packing order after being strained. The films are integrated into devices and characterized under linear polarized light. The strain-oriented detectors have maximum photocurrent anisotropies of 1.4 under transverse polarized light while maintaining peak responsivities of 0.21 A W −1 and a 3 dB cutoff frequency of ≈1 kHz. The demonstrated performance is comparable to the current state of the art all-polymer photodetectors with the added capability of polarization sensitivity enabling new application opportunities.
title: RÉCITS DES ORIGINES 5. La première aube et la création des temples
Creators: name: García Hernández, María Angélica
Publisher: name: Pangloss
Year: 2023
Subjects: subject: Linguistique
subject: Mixtèque

description: Une dernière précision concerne un emprunt à l’espagnol qui apparaît fréquemment dans ce type de récits et qui est le mot « cuento », c’est-à-dire conte. Les habitants se sont appropriés ce mot et lui ont donné une signification plus ample que celle qu’il connaît généralement en espagnol, où il désigne des histoires qui ne correspondent pas (ou plus) aux croyances religieuses. En mixtèque, il peut designer à peu près tout type de récit narratif. Ce sont d’autres indices linguistiques qui permettent d’identifier les croyances des narrations profanes. Ces indices peuvent être la source du récit, l’explicitation du caractère sacré, entre autres.
title: Chest Imaging in the Postoperative Lung Cancer Patient: What To Look For?
Creators: name: Carpentier, Kenneth
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Education and training
subject: Complications
subject: PET-CT
subject: CT
subject: Conventional radiography
subject: Thorax

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To describe the role of imaging in the diagnosis and management of lung cancer patients after surgery To recognize normal postoperative imaging findings as well as early and late complications after thoracic surgery in lung cancer patients To...
Enhancing Performance of Nonfullerene Acceptors via Side-Chain Conjugation Strategy
Creators: name: Zhu, J.
name: Ma, W.
name: Wang, J.
name: You, W.
name: Zhan, X.
name: Liu, K.
name: Lin, Y.
name: Wu, Y.
name: Rech, J.
name: Li, T.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: A side-chain conjugation strategy in the design of nonfullerene electron acceptors is proposed, with the design and synthesis of a side-chain-conjugated acceptor (ITIC2) based on a 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]di(cyclopenta-dithiophene) electron-donating core and 1,1-dicyanomethylene-3-indanone electron-withdrawing end groups. ITIC2 with the conjugated side chains exhibits an absorption peak at 714 nm, which redshifts 12 nm relative to ITIC1. The absorption extinction coefficient of ITIC2 is 2.7 × 105m−1 cm−1, higher than that of ITIC1 (1.5 × 105m−1 cm−1). ITIC2 exhibits slightly higher highest occupied molecular orbital (HOMO) (−5.43 eV) and lowest unoccupied molecular orbital (LUMO) (−3.80 eV) energy levels relative to ITIC1 (HOMO: −5.48 eV; LUMO: −3.84 eV), and higher electron mobility (1.3 × 10−3 cm2 V−1 s−1) than that of ITIC1 (9.6 × 10−4 cm2 V−1 s−1). The power conversion efficiency of ITIC2-based organic solar cells is 11.0%, much higher than that of ITIC1-based control devices (8.54%). Our results demonstrate that side-chain conjugation can tune energy levels, enhance absorption, and electron mobility, and finally enhance photovoltaic performance of nonfullerene acceptors.
(101874) Anne Thurmer
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Molecular Engineering of Conjugated Polymers for Solar Cells: An Updated Report
Creators: name: You, W.
name: Xiao, S.
name: Zhang, Q.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: The device efficiency of polymer:fullerene bulk heterojunction solar cells has recently surpassed 11%, as a result of synergistic efforts among chemists, physicists, and engineers. Since polymers are unequivocally the “heart” of this emerging technology, their design and synthesis have consistently played the key role in the device efficiency enhancement. In this article, the first focus is a discussion on molecular engineering (e.g., backbone, side chains, and substituents), then the discussion moves on to polymer engineering (e.g., molecular weight). Examples are primarily selected from the authors contributions; yet other significant discoveries/developments are also included to put the discussion in a broader context. Given that the synthesis, morphology, and device physics are inherently related in explaining the measured device output parameters (Jsc, Voc and FF), we will attempt to apply an integrated and comprehensive approach (synthesis, morphology, and device physics) to elucidate the fundamental, underlying principles that govern the device characteristics, in particular, in the context of disclosing structure-property correlations. Such correlations are crucial to the design and synthesis of next generation materials to further improve the device efficiency.
(101870) Thomas Theodore Hucklebridge Sydenhawe
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Fluorinated Thiophene Units Improve Photovoltaic Device Performance of Donor-Acceptor Copolymers
Creators: name: Liu, S.
name: Zhang, Q.
name: Peng, Z.
name: Yan, L.
name: You, W.
name: Rech, J.J.
name: Klump, E.
name: Ade, H.
name: Jiao, X.
name: So, F.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Fluorinated conjugated polymers leading to enhanced photovoltaic device performance has been widely observed in a variety of donor-acceptor copolymers; however, almost all these polymers have fluorine substituents on the acceptor unit. Building upon our previously reported PBnDT-FTAZ, a fluorinated donor-acceptor conjugated polymer with impressive device performance, we set this study to explore the effect of adding the fluorine substituents onto the flanking thiophene units between the donor unit (BnDT) and the acceptor unit (TAZ). We developed new synthetic approaches to control the position of the fluorination (3′ or 4′) on the thiophene unit, and synthesized four additional PBnDT-TAZ polymers incorporating the fluorine-substituted-thiophene (FT) units, 3′-FT-HTAZ, 4′-FT-HTAZ, 3′-FT-FTAZ, and 4′-FT-FTAZ. We discover that relocating the fluorine substituents from the acceptor to the flanking thiophene units have a negligible impact on the device characteristics (short circuit current, open circuit voltage, and fill factor) when comparing 4′-FT-HTAZ with the original FTAZ. Combining these two fluorination approaches together, 4′-FT-FTAZ shows even higher device performance than FTAZ (7.7% vs 6.6%) with active layers over 200 nm in thickness. Furthermore, high values of fill factor∼70% are all achieved for photovoltaic devices based on 3′-FT-HTAZ, 4′-FT-HTAZ, or 4′-FT-FTAZ, ascribed to the observed high hole mobilities (over 1 × 10-3 cm2/(V s)) in these devices. Our study offers a new approach to utilize the fluorinated thiophene units in developing new conjugated polymers to further improve the device performance of polymer solar cells.
Impact of Land Degradation on Future World Food Production
Creators: name: Dregne, Harold E.
name: Dregne, Harold E.
Publisher: name: Unknown
Year: 1982
Subjects: subject: Crop Production/Industries
subject: Land Economics/Use
subject: Livestock Production/Industries
subject: Productivity Analysis
subject: Resource /Energy Economics and Policy
subject: land degradation
subject: desertification
subject: productivity
subject: soil

description: Land degradation will likely curb agricultural production increases in the developing countries of Africa, Asia, and Central and South America. Growing populations and weak economies in many countries will seriously hamper efforts to bring new land under cultivation. Forty percent of the world's available land is being farmed, representing the best soils, but cultivating the remaining sparsely populated and often marginal 60 percent of land will require expensive farming techniques and new technology. Improved land management will likely spur per capita food increases in the developed countries.
title: A New Technical Approach in O2 Enhanced MR Scan
Creators: name: Kurozumi, Akira
Publisher: name: European Congress of Radiology
Year: 2017
Subjects: subject: Lung
subject: MR
subject: Technical aspects
subject: Image verification

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: O2 enhanced MR scan is an imaging method utilizing paramagnetism effect of oxygen molecules having unpaired electrons. In previous some reports suggests O2 enhanced MR scan can be useful method to evaluate lung function...
Comparing non-fullerene acceptors with fullerene in polymer solar cells: a case study with FTAZ and PyCNTAZ
Creators: name: So, F.
name: Ade, H.
name: Yan, L.
name: You, W.
name: Ye, L.
name: Zhao, J.
name: Constantinou, I.
name: Yan, H.
name: Kim, J.-H.
name: Zhang, Q.
name: Bauer, N.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Non-fullerene acceptors (NFAs) are becoming a serious contender to fullerene-based electron acceptors in organic photovoltaics, due to their structural versatility and easily tunable optical and electronic properties. However, NFA-based solar cells often have a decreased short-circuit current (Jsc) and fill factor (FF) compared to their fullerene-based counterparts. Here, we investigate the fundamental causes of this decrease in the performance of solar cells using a non-fullerene acceptor (SF-PDI2) paired with two polymer donors, FTAZ and PyCNTAZ, compared with their fullerene-based counterparts. Through a number of experimental techniques and morphological studies, we show that the SF-PDI2-based solar cells suffer from insufficient charge generation, transport, and collection when compared with the PCBM-based solar cells. The SF-PDI2-based solar cells show increased bimolecular recombination, which, together with other recombination loss mechanisms in these cells, causes a significant decrease in their Jsc and FF. Notably, the less pure domains, low electron mobility (on the order of 10−5 cm2 V−1 s−1), and imbalanced mobility (in regard to the hole mobility) further explain the low FF. On the other hand, the higher open-circuit voltage (Voc) in the SF-PDI2 devices is mainly due to the increase in the CT state energy. It is worth mentioning that the PyCNTAZ-based devices show an ultralow charge separation energy (ΔECS), close to 0 eV. Our results demonstrate that further increasing the mobility (both of electrons and holes) in these NFA-based solar cells would be a viable approach to further enhance the efficiency of these new types of solar cells, ideally, without losing the high Voc of such cells.
(101871) Susan Bevan Reeves
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Queerfeindlichkeit in der Wissenschaft
Creators: name: Fuchs, Christiane
Publisher: name: Humboldt-Universität zu Berlin
Year: 2018
Subjects: subject: Queer
subject: Wissenschaft
subject: Diskriminierung
subject: Gesellschaft
subject: Sprache
subject: 303 Gesellschaftliche Prozesse

description: Debatten um eine gleichberechtigte Anerkennung aller Lebens- und Geschlechterverhältnisse werden nicht nur im gesellschaftspolitischen Raum geführt. Auch in der Wissenschaft ist dieses Themenfeld umkämpft. Wissenschaftliche Forschung kann wohl zur Emanzipation beitragen und den Abbau von Diskriminierungen unterstützen. Gleichwohl gibt es aber auch in der Wissenschaft queerfeindliche Tendenzen, die in die Gesellschaft hineinwirken. Christiane Fuchs stellt dazu einige Beispiele vor.