cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Development of an automated adsorbent selection strategy for liquid–phase adsorption
Creators: name: Schreiber, Mareike
name: Schembecker, Gerhard
Publisher: name: TU Dortmund
Year: 2022
Subjects: subject: Automatic adsorbent selection
subject: Downstream process design
subject: Liquid-phase adsorption
subject: Robotic platform
subject: 660
subject: Adsorption
subject: Adsorbens
subject: Produktaufarbeitung
subject: Robotic Process Automation

description: A systematic and automatic approach for adsorbent selection for liquid–phase adsorption is proposed. Based on physical properties like polarity, pore size, and specific surface, a screening strategy is developed and automated on a robotic platform. Key performance indicators are applied ensuring economically based decisions. The approach developed is verified by adsorption of caffeine out of an aqueous solution with vanillin, uracil, and α–ionon as impurities. The adsorbent selection strategy leads to the polymeric adsorbent SP207 and a specific surface of 15 m2mL−1 ending in a separation cost indicator of 16 € gCaffeine−1. This work proposes an opportunity for accelerated process design strengthened by the usage of robotic devices.
description: Chemical engineering & technology;45(6)
The non-abelian target space duals of Taub-NUT space
Creators: name: Hewson, S. F.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the non-abelian duality procedure for groups which do not act freely. As an example we consider Taub-NUT space, which has the local isometry group $SU(2) \otimes U(1)$. We dualise over the entire symmetry group as well as the subgroups $SO(3)$ and $U(1)$, presenting unusual new solutions to low energy string theory. The solutions obtained highlight the relationship between fixed points of an isometry in one solution and singular points in another. We also find the interesting results that, in this case, the $U(1)$ and $SO(3)$ $T$-duality procedures commute with each other, and that the extreme points of the $O(1,1)$ duality group for the time translations have special significance under the $SO(3)$ T-duality.
description: 26 pages LaTeX, one figure as a uuencoded postscript file
Systematic Design Methods for Efficient Off-Chip DRAM Access
Creators: name: Bayliss, Samuel
Publisher: name: Imperial College London
Year: 2012

description: Typical design flows for digital hardware take, as their input, an abstract description of computation and data transfer between logical memories. No existing commercial high-level synthesis tool demonstrates the ability to map logical memory inferred from a high level language to external memory resources. This thesis develops techniques for doing this, specifically targeting off-chip dynamic memory (DRAM) devices. These are a commodity technology in widespread use with standardised interfaces. In use, the bandwidth of an external memory interface and the latency of memory requests asserted on it may become the bottleneck limiting the performance of a hardware design. Careful consideration of this is especially important when designing with DRAMs, whose latency and bandwidth characteristics depend upon the sequence of memory requests issued by a controller. Throughout the work presented here, we pursue exact compile-time methods for designing application-specific memory systems with a focus on guaranteeing predictable performance through static analysis. This contrasts with much of the surveyed existing work, which considers general purpose memory controllers and optimized policies which improve performance in experiments run using simulation of suites of benchmark codes. The work targets loop-nests within imperative source code, extracting a mathematical representation of the loop-nest statements and their associated memory accesses, referred to as the ‘Polytope Model’. We extend this mathematical representation to represent the physical DRAM ‘row’ and ‘column’ structures accessed when performing memory transfers. From this augmented representation, we can automatically derive DRAM controllers which buffer data in on-chip memory and transfer data in an efficient order. Buffering data and exploiting ‘reuse’ of data is shown to enable up to 50× reduction in the quantity of data transferred to external memory. The reordering of memory transactions exploiting knowledge of the physical layout of the DRAM device allowing to 4× improvement in the efficiency of those data transfers.
Linearised Navier-Stokes equations and near-wall streaks in turbulent flow subject to drag reduction by wall oscillations
Creators: name: Blesbois, Olivier
Publisher: name: Imperial College London
Year: 2012

description: Spanwise wall-oscillation is a promising drag reduction technique in turbulent flows. A major factor in drag reduction is the effect of the oscillations on the boundary layer coherent structures, and particularly the weakening of the near-wall streaks. This thesis studies the streaks in various wall oscillations configurations, based on a linear approach to the turbulent flow. The two main aspects are the study of the structures themselves, and an attempt to predict drag. The streak structure is studied mainly in turbulent channel flow subject to harmonic wall forcing, using an optimal perturbation technique. It is shown that the streaks have an angle to the main flow direction, which is almost constant during half an oscillation period and experiences a jump in sign and magnitude twice per period. The linear theory shows that this phenomenon is due to the existence of a structure which is dominant during half a period and has a constant angle. Other features of the linear optimal perturbations are studied, such as their comparison with conditionally averaged turbulent structures. In order to predict drag, the optimal perturbation approach is found to be unsuitable. A more appropriate technique is to use the linearised Navier-Stokes equation subject to random forcing. This was done for a turbulent channel flow subject to travelling wave wall oscillations, thus offering a wide range of comparison with direct numerical simulations, including known regions of drag reduction and drag increase. The main finding is that in the area where drag increase is observed in turbulent flow, the linear operator is unstable. In area where the operator is stable, drag reduction is always predicted. These two topics are the core of this thesis. Other aspects include the derivation and implementation of an optimal perturbation algorithm and a linear solver. Certain theoretical aspects of the optimal perturbation approach were also investigated.
The impact of liberalisation on the resilience of electricity systems
Creators: name: Collins, Christopher
Publisher: name: Imperial College London
Year: 2013

description: Over the past three decades concerns have arisen about the ability of deregulated electricity systems such as the UK’s to deliver secure supplies. Capacity margins have drawn particular attention, but a number of apparently secure systems have failed for unanticipated reasons. This has led some to question whether risk-based measures fully capture the uncertainties to which such systems are exposed, and whether the concept of “resilience” provides a framework around which to discuss less quantitative indicators. This work attempts to answer four questions. First, what are the characteristics of a resilient and secure electricity system? Second, how have these characteristics evolved over the past 25 years? Third, to what extent can these changes be attributed to privatisation & liberalisation and to the introduction of new forms of renewable generation? Fourth, how might the UK Government’s proposed policies affect the security of electricity supply? ‘Resilience’ was found to be a multi-faceted concept, but five indicators were chosen for further investigation: generation margins, system diversity, energy intensity, electricity prices and energy independence. It was shown that a decline in margins can probably not be attributed to privatisation, but that renewable generation can have a positive effect depending on the support mechanism. Diversity can be enhanced by both privatisation and some forms of renewable support, the latter also seemingly reducing a country’s import dependence, but also increasing prices. Whilst there is some evidence that policy changes can affect a system’s resilience, the suggestion is that liberalisation has not had a strong overall impact. Furthermore, achieving ‘optimal resilience’ may be inherently unachievable, meaning that policies will always need to flexible enough to respond to change, but constant enough to encourage the necessary investment for the future.
title: An Introduction to Kogi Grammar
Creators: name: Knuchel, Dominique Liza
Publisher: name: Universität Bern
Year: 2024
Subjects: subject: 410 Linguistics

description: Die Dissertation "An Introduction to Kogi Grammar" ist eine Einführung in die Grammatik des Kogi, einer Sprache, die von etwa 16’000 Menschen in der Sierra Nevada de Santa Marta im Norden Kolumbiens gesprochen wird. Kogi gehört der Arhuaco-Untergruppe an, welche ein Teil der Chibcha-Sprachfamilie ist.
Die vorliegende Untersuchung basiert auf Daten aus erster Hand, die während zehn Monaten Feldforschung zwischen 2016 und 2020 in Zusammenarbeit mit Kogi-Muttersprachler:innen erhoben wurden.
Die Arbeit bietet Hintergrundinformationen über die Sprache und ihre Sprecher:innen. Zudem beinhaltet sie eine Beschreibung der folgenden Themen: Phonologie, Wortklassen, Nomen und Nominalphrasen, Adjektive, Verbflexion und -derivation, Argumentenmarkierung und grammatische Relationen, und komplexe Sätze.
Novel detection strategies using SERS
Creators: name: Cecchini, Michael Peter
Publisher: name: Imperial College London
Year: 2013

description: The use of surface-enhanced Raman spectroscopy (SERS) as an analytical tool has gained increased interest in recent years due to its greater sensitivity and “fingerprinting” ability when compared to other spectroscopic techniques. This thesis discusses approaches used to detect aggregated and single metallic nanoparticles in a high throughput fashion using SERRS. This was accomplished by building a sensitive optical detection platform with high temporal resolution detectors. Initially, nanoparticle aggregates compartmentalized within microdroplets were detected. Each microdroplet can be considered an individual microreactor. Microdroplet flow rate was changed to characterize the effect on microdroplet throughput. Multiple full spectra acquisitions were taken within each microdroplet which was used to compare the different aggregate geometries within each droplet. In addition to segmented flow, single particles in a continuous flow environment are also detected and characterized. A flow based system significantly increases nanoparticle throughput through the probe volume reducing acquisition time. Using correlation spectroscopy, the size of the nanoparticle can be determined and the effect of flow rate on the nanoparticle flow time can be seen. As another detection strategy, single metallic nanoparticles are also detected optically as they translocate through a solid state nanopore. The high electric field generated at the nanopore electrophoretically drives the charged nanoparticles through the nanopore. The nanopore confines the particles to a single channel ensuring single particle detection. Besides the vibrational information that SERS is able to extract, coupling metallic nanoparticles with metallic nanoparticles creates an additional electromagnetic enhancement with increases the SERS signal.
A CORAVEL radial-velocity monitoring of S stars: symbiotic activity vs. orbital separation
Creators: name: Carquillat, J. M.
name: Jorissen, A.
name: Udry, S.
name: Ginestet, N.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Orbital elements are presented for the Tc-poor S stars HR 363 (= HD 7351) and HD 191226. With an orbital period of 4592 d (=12.6 y), HR 363 has the longest period known among S stars, and yet it is a strong X-ray source. Its X-ray flux is similar to that of HD 35155, an S star with one of the shortest orbital periods (640 d). This surprising result is put in perspective with other diagnostics of binary interaction observed in binary S stars. They reveal that there is no correlation between the level of binary interaction and the orbital period. This situation may be accounted for if the wind mass-loss rate from the giant is the principal factor controlling the activity level in these (detached) systems, via a stream of matter funneled through the inner Lagragian point.
description: Astronomy & Astrophysics Supplements, 6 pages, 2 figures, 4 tables (LaTeX A&A). Also available at: http://obswww.unige.ch/~udry/cine/barium/barium.html
Conformal invariance, complex structures, and the Teukolsky connection
Creators: name: Araneda, Bernardo
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that the Teukolsky connection, which defines generalized wave operators governing the behavior of massless fields on Einstein spacetimes of Petrov type D, has its origin in a distinguished conformally and GHP covariant connection on the conformal structure of the spacetime. The conformal class has a (metric compatible) integrable almost-complex structure under which the Einstein space becomes a complex (Hermitian) manifold. There is a unique compatible Weyl connection for the conformal structure, and it leads to the construction of a conformally covariant GHP formalism and a generalization of it to weighted spinor/tensor fiber bundles. In particular, `weighted Killing spinors', previously defined with respect to the Teukolsky connection, are shown to have their origin in the GHP-Weyl connection, and we show that the type D principal spinors are actually parallel with respect to it. Furthermore, we show that the existence of a conformal Killing-Yano tensor can be thought to be a consequence of the presence of a Kahler metric in the conformal class. These results provide an interpretation of the persistent hidden symmetries appearing in black hole perturbations. We also show that the preferred Weyl connection allows a natural injection of spinor fields into local twistor space and that this leads to the notion of weighted local twistors. Finally, we find conformally covariant operator identities for massless fields and the corresponding wave equations.
description: 24 pages
Non-Abelian Stokes Theorem and Computation of Wilson Loop
Creators: name: Chen, Ying
name: He, Bing
name: Wu, Ji-Min
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown that the application of the non-Abelian Stokes theorem to the computation of the operators constructed with Wilson loop will lead to ambiguity, if the gauge field under consideration is a non-trivial one. This point is illustrated by the specific examples of the computation of a non-local operator.
description: Latex 8 pages, 2 figure
Systematic effects important to separated-oscillatory-field measurements of the $n$$=$$2$ Lamb shift in atomic hydrogen
Creators: name: Marsman, A.
name: Horbatsch, M.
name: Corriveau, Z. A.
name: Hessels, E. A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We evaluate a number of systematic effects that are important for an experimental microwave measurement of the $n$$=$$2$ S-to-P intervals in atomic hydrogen. The analysis is important for both re-evaluating the best existing measurement [Lundeen and Pipkin, PRL 46, 232 (1981)] of the 2S$_{1/2}$-to-2P$_{1/2}$ Lamb shift, and for a new measurement that is ongoing in our laboratory. This work is part of a larger program to understand the several-standard-deviation discrepancies between various methods for determining the proton charge radius.
Piezoelectric energy harvesting from low frequency and random excitation using frequency up-conversion
Creators: name: Pillatsch, Pit
Publisher: name: Imperial College London
Year: 2013

description: The field of energy harvesting comprises all methods to produce energy locally and from surrounding sources, e.g. solar illumination, thermal gradients, vibration, radio frequency, etc. The focus of this thesis is on inertial power generation from host motion, in particular for low frequency and random excitation sources such as the human body. Under such excitation, the kinetic energy available to be converted into electrical energy is small and conversion efficiency is of utmost importance. Broadband harvesting based on frequency tuning or on non-linear vibrations is a possible strategy to overcome this challenge. The technique of frequency up-conversion, where the low frequency excitation is converted to a higher frequency that is optimal for the operation of the transducer is especially promising. Regardless of the source excitation, energy is converted more efficiently. After a general introduction to the research area, two different prototypes based on this latter principle and using piezoelectric bending beams as transducers are presented, one linear design and one rotational. Especially for human motion, the advantages of rotational designs are discussed. Furthermore, magnetic coupling is used to prevent impact on the brittle piezoceramic material when actuating. A mathematical model, combining the magnetic interaction forces and the constitutive mechanical and electrical equations for the piezoelectric bending beam is introduced and the results are provided. Theoretical findings are supported by experimental measurements and the calculation model is validated. The outcome is the successful demonstration of a rotational energy harvester, tested on a custom made shaking set-up and in the real world when worn on the upper arm during running.
Chains of N=2, D=4 heterotic/type II duals
Creators: name: Aldazabal, G.
name: Ibanez, L. E.
name: Font, A.
name: Quevedo, F.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We report on a search for $N=2$ heterotic strings that are dual candidates of type II compactifications on Calabi-Yau threefolds described as $K3$ fibrations. We find many new heterotic duals by using standard orbifold techniques. The associated type II compactifications fall into chains in which the proposed duals are heterotic compactifications related one another by a sequential Higgs mechanism. This breaking in the heterotic side typically involves the sequence $SU(4)\rightarrow SU(3)\rightarrow $ $SU(2)\rightarrow 0$, while in the type II side the weights of the complex hypersurfaces and the structure of the $K3$ quotient singularities also follow specific patterns.
description: Latex, 21 pages, 2 tables
Novel optical fibre based laser sources for spectral and temporal versatility
Creators: name: Chapman, Ben Howard
Publisher: name: Imperial College London
Year: 2013

description: As laser amplifiers and oscillators continue to see widespread use in all branches of science and engineering, they continue to develop in terms of operating parameters to keep pace with their applications. Importantly, the temporal and spectral characteristics of laser systems must be carefully tailored to match application requirements. This thesis reports advances in the development of laser systems, based upon optical fibre technology, which demonstrate the flexibility of optical fibre and fibre integrated devices to cover a wide range of temporal and spectral characteristics. First, the principle of spectrally masked phase modulation for short pulse generation is explored. Here, a phase modulator is used to generate a time dependent optical frequency shift, which can be turned into an effective amplitude modulation by the introduction of an optical band pass filter. This method is combined with nonlinear compression techniques based on solitonic propagation in optical fibre to generate optical pulses with duration of a few hundreds of femtoseconds and repetition rates of tens of gigahertz. Increasing the range of wavelengths over with doped fibre amplifier systems will operate requires the development of laser/amplifier systems based on new active dopants. To this end amplifier systems based upon bismuth activated alumosilicate fibre were evaluated. The amplifier stages were then incorporated into a master oscillator power fibre amplifier (MOPFA) scheme, demonstrating the applicability of bismuth doped silica fibre to advanced laser configurations. Finally, the development of a novel laser source for use in fluorescent microscopy is detailed. The source was based on a gain switched diode which is amplified in a two stage Raman fibre amplifier system, subsequently frequency doubled in a periodically poled lithium tantalate crystal. Nonlinearity and optical filtering are exploited to re-shape the output pulse's temporal profile.
Momentum dependence of pion-induced $ϕ$ meson production on nuclei near threshold
Creators: name: Paryev, E. Ya.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We study the near-threshold pion-induced production of $ϕ$ mesons off nuclei in the kinematical conditions of the HADES experiment, recently performed at GSI. The calculations have been performed within a collision model based on the nuclear spectral function. The model accounts for both the primary $π^-$ meson--proton ${π^-}p \to ϕn$ and the secondary pion--nucleon $πN \to ϕN$ $ϕ$ production processes as well as the effects of the nuclear $ϕ$ and nucleon mean-field potentials. We find that the primary reaction channel ${π^-}p \to ϕn$ dominates in the $ϕ$ production off $^{12}$C and $^{184}$W target nuclei in the HADES acceptance window at incident pion momentum of 1.7 GeV/c. We calculate the momentum dependence of the absolute and relative (transparency ratio) $ϕ$ meson yields from the above direct channel. The calculations have been performed for this initial pion momentum allowing for different options for the $ϕN$ absorption cross section $σ_{ϕN}$ and different scenarios for the in-medium mass shifts of the $ϕ$ meson and secondary neutron, produced together with $ϕ$ in this channel. We demonstrate that the transparency ratio for the $ϕ$ mesons has, contrary to the absolute cross sections, an insignificant sensitivity to the $ϕ$ meson and secondary neutron in-medium mass shifts at $ϕ$ momenta studied in the HADES experiment. On the other hand, we show that there are measurable changes in the transparency ratio due to the $ϕN$ absorption cross section, which means that such relative observable can be useful to help determine this cross section from the data taken in the HADES experiment.
description: 21 pages, 9 figures
Megaderma spasma
Creators: name: Cook-Price, Dawn R.
name: Petko, Olga N.
name: Makchai, Sunchai
name: Artchawakom, Taksin
name: Suwanwaree, Pongthep
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Megadermatidae
Megaderma
Megaderma spasma

description: Megaderma spasma (Linnaeus, 1758)
Fig. 20 Lesser false vampire
Notes.
This insectivorous (Balete 2010) species was observed in human-disturbed forest, national park forest, and human habitat areas located near forested areas. This species was caught on mist net traps in each of the trap sites throughout the island.
description: Published as part of Cook-Price, Dawn R., Petko, Olga N., Makchai, Sunchai, Artchawakom, Taksin & Suwanwaree, Pongthep, 2025, Mammal diversity survey of Ko Pha-ngan in Surat Thani Province, Thailand, pp. 77-102 in ZooKeys 1229 on pages 77-102, DOI: 10.3897/zookeys.1229.118127
Automatic Identification of Arabic expressions related to future events in Lebanon's economy
Creators: name: Al-Hajj, Moustafa
name: Sabra, Amani
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this paper, we propose a method to automatically identify future events in Lebanon's economy from Arabic texts. Challenges are threefold: first, we need to build a corpus of Arabic texts that covers Lebanon's economy; second, we need to study how future events are expressed linguistically in these texts; and third, we need to automatically identify the relevant textual segments accordingly. We will validate this method on a constructed corpus form the web and show that it has very promising results. To do so, we will be using SLCSAS, a system for semantic analysis, based on the Contextual Explorer method, and "AlKhalil Morpho Sys" system for morpho-syntactic analysis.
description: 5 pages
The role of amino acids in appetite regulation
Creators: name: McGavigan, Anne
Publisher: name: Imperial College London
Year: 2013

description: There is currently a lack of safe and effective treatment options for obesity. A high protein diet is an effective weight loss and weight maintenance strategy. However, like many diets, high protein diets can be difficult to adhere to. The mechanisms by which protein exerts its weight-reducing effect remain unclear. However, it has been reported that different types of protein exert different effects on appetite. One possible explanation for these differences is the varied amino acid constituents of the protein. Preliminary data from our group investigated the effect of a range of amino acids on food intake in rodents. L-cysteine was identified as the most anorexigenic amino acid. This thesis has investigated the effect of L-cysteine on food intake and explored possible mechanisms by which it mediates this effect. L-cysteine dose dependently decreased food intake in both rats and mice following oral gavage and intraperitoneal administration. This reduction in food intake did not appear to be secondary to behavioural side effects or feelings of nausea. L-cysteine increased neuronal activation in the area postrema and nucleus tractus solitarius, delayed gastric emptying and suppressed plasma acyl-ghrelin levels. However, the anorectic effect of L-cysteine did not appear to depend on NMDA, GPRC6A or CCK-A receptors, nor on subdiaphragmatic vagal afferent signalling. Repeated administration of L-cysteine also decreased food intake in rats and diet-induced obese mice. The studies described in this thesis demonstrate the anorectic effects of L-cysteine and identify possible sites of action. It is likely that different amino acids exert different effects on appetite through a number of mechanisms, the combination of which contributes towards the success of high protein diets on body weight and appetite. This thesis provides a framework for future studies to investigate the therapeutic potential of combinations of amino acids that could provide a safe and practical therapeutic treatment for obesity.
The role of macrophage migration inhibitory factor in airways disease
Creators: name: Russell, Kirsty
Publisher: name: Imperial College London
Year: 2013

description: Chronic obstructive pulmonary disease (COPD) and severe asthma are progressive chronic inflammatory diseases of the airways. Both diseases are characterised by airflow limitation and share some pulmonary symptoms. However they have distinct inflammatory cell signatures and differ in response to corticosteroid (CS) treatment. Most asthmatic patients control their disease with CS, with a few showing a relative CS resistance; however COPD patients show little or no improvement with CS and are CS insensitive. Macrophage migration inhibitory factor (MIF) is a pleiotropic pro-inflammatory mediator whose function is yet to be fully elucidated. MIF has been shown to counter-act the immunosuppressive action of CS. MIF is elevated in chronic diseases such as asthma and atherosclerosis. The role of MIF in COPD has not been investigated and its role in asthma is not fully understood. MIF inhibition attenuated ozone-induced airway inflammation and lung function in vivo but did not affect CS sensitivity. MIF expression did not vary between stable COPD patients and controls. Pro-inflammatory effects of MIF were investigated in THP-1 monocytes and primary cells. There was no clear role for MIF in LPS-induced inflammation. MIF modulated the transactivation functions of CS in THP-1 cells. Finally I took an unbiased approach to generate new hypotheses for MIF function using proteomic and transcriptomic techniques. The RIG-I-like pathway was identified by proteomics as a novel target pathway and was investigated in THP-1 cells and human BAL macrophage samples following viral infection. The role of MIF in airway inflammation remains unclear and results demonstrated here show MIF function does not necessarily translate from mouse to humans. MIF does not seem to have a role in the inflammation of stable disease. The proteomic data suggests that the association between viral infection, MIF and CS in regulating CS sensitivity in COPD and severe asthma should be investigated.
Oral history interview with Louis F. Kalmar 1975
Publisher: name: Columbia University
Year: 2019
Subjects: Foresters
Executives
World War, 1939-1945--Naval operations, American
Forests and forestry
Conservation of natural resources
Paper industry

description: Childhood; company store in West Virginia mining town; forestry school; World War II: D-Day in Europe, Luzon landing; 1946, Robert Gair Company; expansion and land acquisition in southern United States; large scale site preparation for tree planting; selection of parent trees, seed orchards, testing and propaogation; Southern Advance Company; changes in conservation and reforestation practices; Continental's woodlands program at time of Gair acquisition; marketing research and banking; communication with corporate management; present and projected status of woodland operation.
Oral history interview with Louis F. Henneke 1975
Publisher: name: Columbia University
Year: 2019
Subjects: Accountants
Factory management
Sales management
Accounting

description: Early childhood in the West; timekeeper for United States Can in the 1920s; building and production of East St. Louis plant; industrial accidents; Continental Can Company; cost control procedures, recollections of management personnel; Condit system, salaries and hours; plant production; Depression and World War II; constructions and acquisitions in St. Louis area; customer credit; modernization of accounting system, cost control under Sterling Smith; sales forecasts; paper division accountant, 1947; Contract and Price Department; company districts; competing manufacturers; Western Electric subcontract.
Oral history interview with Louis G. Cowan, 1967
Publisher: name: Columbia University
Year: 2021
Subjects: Television producers and directors
Radio producers and directors
Presidents--Election--1952.--United States
Radio supplies industry--United States
World War, 1939-1945--Propaganda
Television broadcasting
African Americans in radio broadcasting

description: Early interest in communications; University of Chicago; radio work in Chicago in the 1930s; various early productions, including "Quiz Kids"; work during World War II: Director, Voice of America and Office of War Information, New York, N.Y.; programs for War Department, including "Command Performance," "Chaplain Jim"; Louis G. Cowan radio and television productions, 1946-1955; transition from radio to television; Negroes in broadcast industry; use of broadcasting and television in Adlai Stevenson 1952 Presidential campaign; Peabody and other broadcast awards; CBS network role
Mechanical response of two plastic clay soils from Sudan
Creators: name: Al Haj, Khalid
Publisher: name: Imperial College London
Year: 2013

description: Vast areas of Sudan and South Sudan are covered by alluvial soils derived from the River Nile and its tributaries, across its historic flood plain. These soils are often highly plastic and expansive in nature and cause many problems in the design, construction and operation of geotechnical structures such as highway foundations and embankments involving compacted fills. The mechanical responses of two natural alluvial (Nile) soils from Khartoum, Sudan, have been investigated experimentally. Disturbed samples of a black cotton clay and red clay, both highly plastic, were used to prepare compacted and reconstituted samples. Undisturbed block samples of the black cotton soil in its unsaturated state were taken to investigate the influence of its natural in-situ fabric. Both soils have been fully characterised and intact, reconstituted, and compacted samples tested using advanced triaxial and oedometer (conventional and osmotic) apparatus. Soil-Water-Retention-Curves (SWRCs) were generated for the soils using the filter paper technique to establish their unsaturated response during drying and wetting cycles (the influence of sample shape was also investigated). The SWRCs indicate that both soils develop significant hysteresis between first drying and wetting curves but for subsequent cycles little hysteresis occurs. The onset and form of cracking was observed during the SWRC drying. There is no significant effect of sample's sizes on SWRC. Both clays exhibit a high swelling potential when the moisture content increases from its in-situ value to full saturation. During undrained shearing reconstituted samples had a much more brittle response after K0 consolidation compared with isotropic consolidation while the soils' stiffness response for both K0 and isotropic consolidation is very similar. The strength of natural unsaturated samples was found to increase with confining stress. Tests using osmotic oedometers indicate that, for both the black and red soils, the magnitude of suction has a significant effect on compression and expansion indices, with them decreasing with increasing suction. The elasto-plastic models proposed by Wheeler and Sivakumar (1995) and Alonso et al. (1990) (BBM) were found to not be suitable for predicting the behaviour of the unsaturated compacted black and red soils as the results show only very limited signs of a `yield point', i.e. there was negligible loading collapse behaviour observed at the stress levels used in the tests performed, for both these Sudanese clays.
Additional file 1: of Graphene-Based Nanoscale Vacuum Channel Transistor
Creators: name: Xu, Ji
name: Zhuyan Gu
name: Wenxin Yang
name: Qilong Wang
name: Xiaobing Zhang
Publisher: name: figshare
Year: 2018
Subjects: subject: Biophysics
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Molecular Biology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Figure S1. The schematic diagram and optical picture of the CVD system. Figure S2. The whole structure of the devices. Figure S3. Schematic diagrams of the carriers in solid-state device and the electrons in the vacuum nanogap. (DOCX 719Â kb)
Gaceta Punto Crítico No. 10 (abril-junio 2024)/ Newsletter Punto Crítico No.10 (April-June 2024)
Creators: name: Plataforma Mexicana de Captura y Almacenamiento de CO2
Publisher: name: Zenodo
Year: 2024

description: Hoy en día, es sencillo tener al alcance de nuestra mano casi cualquier cosa que deseemos, sólo necesitamos un dispositivo que nos facilite el acceso a la multitud de aplicaciones y sitios web que funcionan como intermediarios entre nosotros y el mundo. Si bien existen grandes beneficios de la hiperconexión en la que vivimos y que avanza aceleradamente en una carrera por conquistar mercados, mentes y territorio, podemos encontrar muchos retos para que estas plataformas no nos rebasen. Por retador que parezca, la buena noticia es que las personas seguimos siendo la pieza clave detrás de la tecnología. En esta edición, abordamos el tema de plataformas humanas y digitales con una nota de Paola García acerca del uso de estas herramientas para abordar temas de sostenibilidad, y otra a cargo de Cecilia Rodríguez y David Montaño acerca de cómo las plataformas pueden ayudar a cerrar brechas en la educación en temas de energía y sostenibilidad. En CO2nversando, te presentamos una entrevista con Igor Jiménez de Codek sobre el diseño de plataformas. También te compartimos tres infografías en Sí, sí es: plataformas, ¿qué nos dicen las redes?, y el simulador EN-Roads del MIT. Finalmente, te dejamos una lista de sugerencias y recomendaciones sobre este tema para llevar.
description: Nowadays, it is easy to have almost anything we want at our fingertips; we only need a device that provides us with access to the multitude of applications and websites that function as intermediaries between us and the world. Although there are great benefits of the hyperconnection in which we live and which is advancing rapidly in a race to conquer markets, minds and territory, we can encounter many challenges so that these platforms do not overtake us. As challenging as it may seem, the good news is that people continue to be the key behind technology. In this edition, we address the topic of human and digital platforms with a note by Paola García about the use of these tools to address sustainability issues and another by Cecilia Rodríguez and David Montaño about how platforms can help close gaps in education on energy and sustainability issues. At CO2nversando, we present you an interview with Igor Jiménez from Codek about platform design. We also share three infographics in Yes, yes it is: platforms, what do networks tell us?, and the MIT EN-Roads simulator. Finally, we leave you a list of suggestions and recommendations on this topic to take away.
Extending Kelly Staking Strategies to Peer-to-Peer Betting Exchanges
Creators: name: Noon, Edmund
Publisher: name: Imperial College London
Year: 2013

description: In his seminal paper J. L. Kelly Jr. linked information theory with a staking system for calculating the stake of a favourable bet. Kelly’s system is elegant, and under certain conditions can be said to be optimal. In the fifty years since, his ideas have been extended to financial markets, with much success. There have been fewer such extensions to betting. In many countries gambling has been liberalised and the range of bets available has increased markedly. One recent innovation has made a particular impact, i.e. the introduction of peer-to-peer betting exchanges. Betting exchanges allow their members to place bets with each other, behaving as bookmakers, something Kelly did not consider. This and the Internet have increased the number of bets available on a given event. These are often highly correlated. We extend Kelly’s method to incorporate lay bets; and we do so analytically. We extend this numerically to incorporate highly correlated bets and commission, another feature unique to exchanges. We further extend this solution to include bets previously placed, making possible a profit before the match has started. Whilst extending the optimal solution to cover new situations we make use of the increase in data available to examine the applicability of the original assumptions. We run Monte-Carlo simulations to show when these assumptions are likely to fail. One of the features of betting exchanges is the ability to increase or reduce the bet size as the odds change over time. We examine the optimal bets to add to an existing portfolio of bets if the odds have changed. We briefly consider changes in the modelled probabilities. Finally, we suggest a novel way of reversing Kelly’s strategy to provide a market making strategy, even when there is some uncertainty in where the market prices should be. However we also show that if that uncertainty is too great such a strategy is unlikely to be profitable.
Influence of chemical structure on molecular interactions and microstructure of organic photovoltaic materials
Creators: name: Guilbert, Anne Antoinette Yvette
Publisher: name: Imperial College London
Year: 2013

description: The performance of organic solar cells based on blend films of a conjugated polymer and a fullerene derivative is strongly related to the blend microstructure. Therefore, in selecting new materials for improved light harvesting or higher photovoltage, it is essential to understand the effect of chemical structure on molecular interactions in order to find ways to control the final blend microstructure. In this thesis, we first address the influence of the number of side chains attached to the fullerene on the microstructure of a regioregular poly(3-hexylthiophene)(P3HT):fullerene blend using transmission electron microscopy, steady-state and ultra-fast photoluminescence spectroscopy and grazing incidence X-Ray diffraction (GIXRD). We investigate the influence of fullerene side chains on the P3HT:fullerene binary phase behaviour using differential scanning calorimetry (DSC). We relate our findings to the observed optoelectronic properties of the same binary systems. This study highlights the importance of miscibility and crystallisation in microstructure development. Secondly, we seek a spectroscopic probe of the onset of aggregation (or solubility limit) of fullerenes in polymer. We study regiorandom P3HT:fullerene blend filmsas a function of fullerene type and content using steady-state and ultra-fast photoluminescence spectroscopy. We relate the onset of fullerene aggregation with the appearance of charge transfer (CT) state emission. We correlate the CT state emission energy with fullerene crystallisation, probed by DSC. Thirdly, we address the influence on polymer packing of the bridging atom between the backbone and the side chains in poly[2,1,3-benzothiadiazole-4,7-diyl[4,4- bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b’]dithiophene-2,6-diyl]] (PCPDTBT) using GIXRD and molecular modelling. We find that chemical substitution of the carbon bridging atom by silicon increases side chain flexibility, leading to different crystal structures. Finally, we use quasi-elastic neutron scattering and molecular dynamics to probe the side chain dynamics of polythiophenes with different side chain lengths.
Additional file 2: of Two decades of antenatal and delivery care in Uganda: a cross-sectional study using Demographic and Health Surveys
Creators: name: Benova, Lenka
name: Mardieh Dennis
name: Lange, Isabelle
name: Campbell, Oona
name: Waiswa, Peter
name: Haemmerli, Manon
name: Fernandez, Yolanda
name: Kerber, Kate
name: Lawn, Joy
name: Santos, Andreia
name: Matovu, Fred
name: Macleod, David
name: Goodman, Catherine
name: Loveday Penn-Kekana
name: Ssengooba, Freddie
name: Lynch, Caroline
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Table S1. Sample sizes (unweighted) used in analyses, by survey. Table of sample sizes, by survey. Table S2. Comparison of estimates of deliveries from all births to most recent births, by survey. Table of estimates, by method. Table S3. Categorisation of ANC and delivery care locations into sector of provision, by survey. Table showing response options for ANC and delivery care locations by survey. Table S4. Change in coverage and co-coverage indicators over time. Table showing estimates and change over time. Table S5. Differences in the extent of socio-economic inequalities over time. Table showing extent of socio-economic inequalities. (PDF 320 kb)
Long-term structural health monitoring of plate-like structures using distributed guided wave sensors
Creators: name: Attarian, Vatche
Publisher: name: Imperial College London
Year: 2013

description: Aircraft, containers, and storage tanks contain plate-like structures that are safety critical. The structures often undergo non-destructive inspections. The inspection frequency tends to be over-conservatively high, and it may be possible to reduce the intervals between inspections to realize cost savings. This goal can possibly be realized by automated structural health monitoring (SHM) of structures using sparse active guided wave sensor arrays. Guided waves are sensitive to small defects and can propagate long distances across feature dense plates. Thus, a guided wave SHM system that enables reliable detection of critical defects or monitoring of their growth can potentially be used to reduce the frequency of inspections for real structures. Industrial guided wave SHM systems must be reliable throughout prolonged exposure to temperature, humidity, and loading changes encountered in operation. Research at Imperial College shows that temperature compensation and subtraction between monitored guided wave signals and baselines acquired from healthy plates enables detection of 1.5% reflection change over areas ~1 m^2 in the presence of thermal swings and uniform liquid layers. These results and findings from scattering studies indicate it may be possible to detect reflections from hole type defects and notches affecting structures during their operation. An issue is that demonstrations of SHM system capabilities have only been shown in controlled laboratory tests within short periods following baseline acquisition. There is concern whether sustained exposure to service conditions will subject transducer elements to irreversible changes and introduce variability in baseline subtraction results that would mask signals due to slowly growing damage. This thesis studies the reliability of guided wave SHM for monitoring plate-like structures over longer time periods. The theoretical characteristics of the fundamental Lamb waves and their use to monitor and detect damage are reviewed. Strategies for sensing and signal processing are described alongside experimental validation of their performance. The effectiveness of the SHM system is tested in experiments where damage-free plates are exposed to British weather as well as thermal variations in an environmental chamber. The monitoring capabilities of bonded piezoelectric sensors are quantified and compared to the performance achieved using electromagnetic acoustic transducers. Experimental results and findings from simulations of bonded piezoelectric transduction establish that performances achieved with bonded sensors degrade due to variations in the properties of adhesives used to attach sensors to plates. EMATs are relatively stable and capable of enabling detection of 1.5% reflection change at points away from the edges of plates after sustained exposure to thermal cycling loads.