cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Effects of Anthropogenic Food on the Body Condition, Biochemistry, Stable Isotopes and Egg Quality of Silver Gulls in Tasmania
Creators: name: Auman, HJ
Publisher: name: University Of Tasmania
Year: 2023

description: Many studies worldwide have attested to an increase in gull populations following urbanisation, and it is widely presumed that gulls have benefited as a direct consequence. However, foraging at tips and food outlets may induce a health cost in urbanised birds and the benefits of eating anthropogenic food should be questioned; the physiological health effects of \garbivory\" on wild birds are yet to be tested. This study was based on the premise that a negative effect on the health and hence fitness of gulls was expected from eating the equivalent of human \"junk food\". This research investigated the potential adverse effects of an anthropogenic diet on the health of Silver Gulls (Larus novaehollandiae) by comparing birds breeding at a remote non-urbanised site (Furneaux Island Group Bass Strait) with those at an urbanised (Hobart) colony in Tasmania Australia. A variety of approaches were used to assess the health of this species to gain a more comprehensive evaluation. Mass and body condition (measured by an index) stable isotopes in whole blood (13C/12C and 15N/14N) blood biochemistry (HDL- and total cholesterol triglycerides glucose calcium sodium potassium and corticosterone) and egg quality (physical measurements and mass absolute and proportional chemistries shell thickness yolk colour and historic comparisons) were compared between the two gull populations. Urbanised gulls were heavier and had greater body condition than structurally identical non-urbanised gulls. Analyses of stable isotopes in whole blood suggested that remote non-urbanised gulls tended to eat from a more marine origin while urbanised gulls fed from a different food web and from a more freshwater/terrestrial origin. Assessment of regurgitations suggested that although specific dietary items were generally either human-derived or natural some overlap existed between sites. The urbanised gulls had higher levels of HDL-cholesterol in their blood. Clutch sizes did not differ but eggs from the Furneaux Island Group were larger heavier and had greater yolk mass than those from Hobart as well as greater carotenoid concentrations in the yolk. Although urbanised Silver Gulls were apparently successful in laying eggs poorer reproductive success may have resulted from smaller lighter eggs that contain proportionally less yolk reserves. Overall the Silver Gull provided a very good model to study the effects of urbanisation on a native species and numerous opportunities exist to focus future research in this area."
The dynamical core of the Aeolus 1.0 statistical-dynamical atmosphere model: Validation and parameter optimization
Creators: name: Totz, S.
name: Eliseev, A.V.
name: Petri, S.
name: Flechsig, M.
name: Caesar, L.
name: Petoukhov, V.
name: Coumou, D.
Publisher: name: Göttingen : Copernicus GmbH
Year: 2018
Subjects: subject: Aeolus
subject: 550

description: We present and validate a set of equations for representing the atmosphere's large-scale general circulation in an Earth system model of intermediate complexity (EMIC). These dynamical equations have been implemented in Aeolus 1.0, which is a statistical-dynamical atmosphere model (SDAM) and includes radiative transfer and cloud modules (Coumou et al., 2011; Eliseev et al., 2013). The statistical dynamical approach is computationally efficient and thus enables us to perform climate simulations at multimillennia timescales, which is a prime aim of our model development. Further, this computational efficiency enables us to scan large and high-dimensional parameter space to tune the model parameters, e.g., for sensitivity studies.

Here, we present novel equations for the large-scale zonal-mean wind as well as those for planetary waves. Together with synoptic parameterization (as presented by Coumou et al., 2011), these form the mathematical description of the dynamical core of Aeolus 1.0.

We optimize the dynamical core parameter values by tuning all relevant dynamical fields to ERA-Interim reanalysis data (1983-2009) forcing the dynamical core with prescribed surface temperature, surface humidity and cumulus cloud fraction. We test the model's performance in reproducing the seasonal cycle and the influence of the El Niño-Southern Oscillation (ENSO). We use a simulated annealing optimization algorithm, which approximates the global minimum of a high-dimensional function.

With non-tuned parameter values, the model performs reasonably in terms of its representation of zonal-mean circulation, planetary waves and storm tracks. The simulated annealing optimization improves in particular the model's representation of the Northern Hemisphere jet stream and storm tracks as well as the Hadley circulation.

The regions of high azonal wind velocities (planetary waves) are accurately captured for all validation experiments. The zonal-mean zonal wind and the integrated lower troposphere mass flux show good results in particular in the Northern Hemisphere. In the Southern Hemisphere, the model tends to produce too-weak zonal-mean zonal winds and a too-narrow Hadley circulation. We discuss possible reasons for these model biases as well as planned future model improvements and applications.
Nowe technologie obrazu i dźwięku w praktyce produkcyjnej
Creators: name: Dąbrowski, Marcin
name: Głowiak, Maciej
name: Skotarczak, Eryk
name: Stróżyk, Maciej
Publisher: name: Zenodo
Year: 2018

description: Technologia produkcji i dystrybucji audio/video podlega obecnie szybkim przeobrażeniom. W artykule podsumowano aktualny stan rozwoju technologicznego i wyzwania na najbliższe lata na przykładzie prowadzonych przez PCSS eksperymentów, a także stanu standaryzacji. Jako uczestnik krajowych i międzynarodowych projektów badawczych, PCSS produkuje zarówno treści 8K czy VR 360°, eksperymentuje z dźwiękiem ambisonicznym, jak również tworzy interaktywne treści immersyjne VR/AR. Efekty prac PCSS są prezentowane na takich wydarzeniach jak targi technologiczne (IBC, NAB), festiwale Ars Electronica, Festival de Cannes czy konferencje naukowe (TNC, NEM). Artykuł omawia przede wszystkim aspekty praktyczne, jak również i problemy techniczne, z jakimi borykają się producenci eksperymentalnych treści wysokiej jakości i immersyjnych.
Dirac Gauginos in General Gauge Mediation
Creators: name: Benakli, K.
name: Goodsell, M. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the formulation by Meade, Seiberg and Shih of general gauge mediation of supersymmetry breaking to include Dirac masses for the gauginos. These appear through mixing of the visible sector gauginos with additional states in adjoint representations. We illustrate the method by reproducing the existing results in the literature for the gaugino and sfermion masses when preserving R-symmetry. We then explain how the generation of same sign masses for the two propagating degrees of freedom in the adjoint scalars can be achieved. We end by commenting on the use of the formalism for describing U(1) mixing.
description: 22 pages, no figures. V2: minor corrections.
Creep of compacts of colloidal boehmite (A100H) during dehydroxylation
Creators: name: St-Jacques, Robert Gustave
Publisher: name: University of British Columbia
Year: 2011

description: A compressive creep study of cold compacted colloidal boehmite has been carried out during the dehydroxylation reaction. The creep tests were made as a function of temperature, applied stress and the relative density of the cold compact. The activation energy for creep has been found to be 9.1 ± 1.5 Kcal/mole. The total creep rate was due to the stress associated with the neck formation at the points of contact and the applied stress. The creep rate is proportional to the applied stress. The final form of the total creep rate equation is ė =[0.144 exp ( formula omitted )+2.2x10ˉ⁷σ] sec ˉ¹. Electron photomicrographs of fractured surfaces of deformed specimens revealed the presence of contact points in the aligned fibers, confirming the existence of the driving force for shrinkage. Equations relating the change in length and the strength of a compact with time have been tested with the experimental data, which indicated that the rate controlling mechanism may be volume diffusion for the creep process.
Preparation and cycling performance of iron or iron oxide containing amorphous Al-Li alloys as electrodes
Creators: name: Thoss, F.
name: Giebeler, L.
name: Weißer, K.
name: Feller, J.
name: Eckert, J.
Publisher: name: Basel : MDPI AG
Year: 2014
Subjects: subject: Amorphous
subject: Ball milling
subject: Iron oxide
subject: Li-ion batteries
subject: Metallic anodes
subject: 540

description: Crystalline phase transitions cause volume changes, which entails a fast destroying of the electrode. Non-crystalline states may avoid this circumstance. Herein we present structural and electrochemical investigations of pre-lithiated, amorphous Al39Li43Fe13Si5-powders, to be used as electrode material for Li-ion batteries. Powders of master alloys with the compositions Al39Li43Fe13Si5 and Al39Li43Fe13Si5 + 5 mass-% FeO were prepared via ball milling and achieved amorphous/nanocrystalline states after 56 and 21.6 h, respectively. In contrast to their Li-free amorphous pendant Al78Fe13Si9, both powders showed specific capacities of about 400 and 700 Ah/kgAl, respectively, after the third cycle.
Electrostatic confinement of electrons in an integrable graphene quantum dot
Creators: name: Bardarson, J. H.
name: Titov, M.
name: Brouwer, P. W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We compare the conductance of an undoped graphene sheet with a small region subject to an electrostatic gate potential for the cases that the dynamics in the gated region is regular (disc-shaped region) and classically chaotic (stadium). For the disc, we find sharp resonances that narrow upon reducing the area fraction of the gated region. We relate this observation to the existence of confined electronic states. For the stadium, the conductance looses its dependence on the gate voltage upon reducing the area fraction of the gated region, which signals the lack of confinement of Dirac quasiparticles in a gated region with chaotic classical electron dynamics.
description: 4 pages, 4 figures; [v2] Added discussion of large aspect ratios
Direct Experimental Evidence for the Hybridization of Organic Molecular Orbitals with Substrate States at Interfaces: PTCDA on Silver
Creators: name: Ziroff, J.
name: Forster, F.
name: Scholl, A.
name: Puschnig, P.
name: Reinert, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate the application of orbital k-space tomography for the analysis of the bonding occurring at metal-organic interfaces. Using angle-resolved photoelectron spectroscopy (ARPES), we probe the spatial structure of the highest occupied molecular orbital (HOMO) and the former lowest unoccupied molecular orbital (LUMO) of one monolayer 3,4,9,10-perylenetetracarboxylic-dianhydride (PTCDA) on Ag(110) and (111) surfaces and in particular the influence of the hybridization between the orbitals and the electronic states of the substrate. We are able to quantify and localize the substrate contribution to the LUMO and thus prove the metal-molecule hybrid character of this complex state.
description: Accepted version, PRL. Supplemented figures, one additional reference, minor changes in wording
User-friendly and learner-friendly courseware design, development and evaluation
Creators: name: Howard, Y
Publisher: name: University Of Tasmania
Year: 2023

description: The design of eLearning courseware has become an important area of research within contemporary Higher Education. The literature and practice of designing eLearning indicates that the role of user-friendly and learner-friendly design as it applies to fully-online courseware is yet to be established. When it comes to user-friendly design, an established set of heuristics is still in development, as researchers' investigate the impact an additional requirement of learning has on traditional user-friendly design. When it comes to learner-friendly design, there are still questions in regards to the features that contribute to effective pedagogical design. The design, development and evaluation of fully-online courseware based on a constructivist philosophy for ill-structured problem types, is yet to be discussed in-depth within the literature. In particular, it is not clear whether learners' perspectives differ from that of academics and professional courseware designers. This thesis attempts to address these gaps in the literature through a mixed-methods approach. Firstly, a questionnaire survey is used to obtain statistical and open-ended data on teaching and learning online, user-friendly design, and learner-friendly design, from a range of students, academics, and professionals. Secondly, a fully-online prototype courseware on Intercultural Communication aimed at first-year university students, has been designed and developed by the researcher. A sample group of participants evaluate this courseware, through openended interview and email feedback. The results are bought together to present a range of contemporary perspectives on some specific aspects of user-friendly and learner-friendly courseware design.
Field Induced Orbital Antiferromagnetism in Mott Insulators
Creators: name: Al-Hassanieh, K. A.
name: Batista, C. D.
name: Ortiz, G.
name: Bulaevskii, L. N.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report on a new electromagnetic phenomenon that emerges in Mott insulators, i.e., materials that do not conduct electricity because of strong electronic Coulomb repulsion. The phenomenon manifests as antiferromagnetic ordering due to orbital electric currents which are spontaneously generated from the coupling between spin currents and an external homogenous magnetic field. This novel spin-charge current effect provides the mechanism to detect the so far elusive spin currents by means of unpolarized neutron scattering, nuclear magnetic resonance or muon spectroscopy. We illustrate this mechanism by solving a half-filled Hubbard model on a frustrated ladder, a simple but nontrivial case of strongly interacting electrons.
description: 4 pages, 3 figures
Single layer graphene induces load-bearing molecular layering at the hexadecane-steel interface
Creators: name: Krämer, G.
name: Kim, C.
name: Kim, K.-S.
name: Bennewitz, R.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2019
Subjects: subject: atomic force microscopy
subject: grapheme
subject: molecular layering
subject: nanotribology
subject: 620

description: The influence of a single layer graphene on the interface between a polished steel surface and the model lubricant hexadecane is explored by high-resolution force microscopy. Nanometer-scale friction is reduced by a factor of three on graphene compared to the steel substrate, with an ordered layer of hexadecane adsorbed on the graphene. Graphene furthermore induces a molecular ordering in the confined lubricant with an average range of 4-5 layers and with a strongly increased load-bearing capacity compared to the lubricant on the bare steel substrate. © 2019 IOP Publishing Ltd.
Linear and nonlinear absorption of titanium dioxide films produced by plasma ion-assisted electron beam evaporation: Modeling and experiments
Creators: name: Stenzel, Olaf
name: Wilbrandt, Steffen
name: Mühlig, Christian
name: Schröder, Sven
Publisher: name: Basel : MDPI
Year: 2019
Subjects: subject: Absorption measurement
subject: Laser-induced deflection
subject: Nonlinear refraction
subject: Optical coatings
subject: Optical constants
subject: Scattering
subject: Titanium dioxide
subject: Two-photon absorption
subject: 660

description: Titanium dioxide films were prepared by plasma ion-assisted electron beam evaporation. Linear optical properties were investigated in terms of spectrophotometry using the beta-distributed oscillator (ss_do) model as a parametrized dispersion law. The nonlinear two-photon absorption coecient of titanium dioxide was determined by means of the laser-induced deflection technique at a wavelength of 800 nm. The obtained values of (2-5) x 10-11 cm/W were consistent with published experimental values for rutile as well as for simulations performed in the frames of the ss_do and Sheik-Bahae models. © 2020 by the authors.
Knowing El Nino: integrating knowledges of managing climate variability in the eastern Australian rangelands
Creators: name: Leith, Peat
Publisher: name: University Of Tasmania
Year: 2023

description: Climate variability in Australia's rangelands leads to large swings in agricultural productivity from year to year. Contemporary policy has framed such variability as a manageable risk and Australian governments have fostered the development of a scientific community to assist farmers and graziers to manage climate risk via models, predictions and various information products. Meanwhile, farmers and graziers make decisions on the basis of diverse forms of information and knowledge. This thesis is a qualitative analysis of the knowledge boundaries among these scientific and lay communities. I conducted the research in three parts. Firstly, I undertook and analysed 35 in-depth, semi-structured interviews with Australian scientists involved in research, development and extension of climate-related risk management tools. These technologies are based on climate models, which predict the impacts or dynamics of the El Ni‚àö¬±o Southern Oscillation (ENSO) and other major climatic fluctuations. Many are also reliant on systems models, which link the climate models to particular agricultural and geographic contexts. Secondly, I conducted and analysed interviews with 70 graziers in the semi-arid rangelands of eastern Australia. Thirdly, these two analyses were brought together with a re-constructive goal: to inform institutional practices and foster improved integration of scientific and lay knowledges concerning climate variability and rangeland management. The discourse analysis focused on matters of epistemological and ontological substance. On the one hand, I investigated how climate variability and predictability were constituted by participants. On the other, I analysed what these constitutions of climate reveal about participants' positioning with respect to particular knowledge claims, identities, discourse and institutions. Following a detailed discussion about how scientists and graziers constituted climate variability, I conclude by positing that climate knowledges, made mutually by scientists and graziers, become mutually useful. I detail five principles which will enhance such mutual knowledge production across the relevant domains of research and practice, as follows: 1. Framing the problems associated with managing climate variability needs to be done deliberatively, involving both graziers and scientists. 2. Articulating diverse socio-environmental concerns in addressing problems requires integration of social and biophysical science. 3. Reflexivity and humility should be explicitly emphasised as elements of scientific praxis in this public good science. 4. Scientists should include and closely examine the placed knowledges of lay actors. 5. Integrating extension with research and development will make scientific knowledge-making more effectively targeted and adaptive.
Noise reduction in 3D noncollinear parametric amplifier
Creators: name: Migdał, Piotr
name: Wasilewski, Wojciech
Publisher: name: arXiv
Year: 2009
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analytically find an approximate Bloch-Messiah reduction of a noncollinear parametric amplifier pumped with a focused monochromatic beam. We consider type I phase matching. The results are obtained using a perturbative expansion and scaled to a high gain regime. They allow a straightforward maximization of the signal gain and minimization of the parametric fluorescence noise. We find the fundamental mode of the amplifier, which is an elliptic Gaussian defining the optimal seed beam shape. We conclude that the output of the amplifier should be stripped of higher order modes, which are approximately Hermite-Gaussian beams. Alternatively, the pump waist can be adjusted such that the amount of noise produced in the higher order modes is minimized.
description: 18 pages, 9 figures, accepted to Applied Physics B
Novel Application of Polymer Networks Carrying Tertiary Amines as a Catalyst Inside Microflow Reactors Used for Knoevenagel Reactions
Creators: name: Berg, Patrik
name: Obst, Franziska
name: Simon, David
name: Richter, Andreas
name: Appelhans, Dietmar
name: Kuckling, Dirk
Publisher: name: Weinheim : Wiley-VCH Verl.
Year: 2020
Subjects: subject: Green chemistry
subject: Hydrogel dots
subject: Immobilized organocatalysts
subject: Microfluidic reactor
subject: Organocatalytic reaction
subject: 540

description: A novel application is described for utilizing hydrogel dots as organocatalyst carriers inside microfluidic reactors. Tertiary amines were covalently immobilized in the hydrogel dots. Due to the diffusion of reactants within the swollen hydrogel dots, the accessible amount of catalysts inside a microfluidic reactor chamber can be increased compared to the accessible amount of surface-bound catalysts. To perform fast Knoevenagel reactions, important flow parameters had to be validated to optimize the reactor performance while keeping the dimensions of the reactor chamber constant; e.g. the height of the hydrogel dots had to be adjusted to the invariable dimensions of the reactor chamber, or an adjustment of organocatalysts in the hydrogel dots had to be validated to achieve the highest conversion rate during a certain residence time. To characterize the conversion, nuclear magnetic resonance (NMR) and UV/Vis-spectroscopy were utilized as an offline and online method, respectively. With suitable hydrogel dots, the influence of different flow parameters (e.g., operating flow rate and reactant concentration) on the selected model reactions in the microfluidic reactor was investigated. Finally, a variety of reactants were screened with the optimized flow parameters. With these results, the turnover frequency was determined for the Knoevenagel reactions in a microfluidic reactor, and the results were compared with published data that were determined by other synthetic approaches. © 2020 The Authors published by Wiley-VCH GmbH
An index to quantify an individual's scientific research output that takes into account the effect of multiple coauthorship
Creators: name: Hirsch, J. E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: I propose the index $\hbar$ ("hbar"), defined as the number of papers of an individual that have citation count larger than or equal to the $\hbar$ of all coauthors of each paper, as a useful index to characterize the scientific output of a researcher that takes into account the effect of multiple coauthorship. The bar is higher for $\hbar$.
description: A few minor changes from v1. To be published in Scientometrics
Camera artist in Antarctica: Herbert Ponting's images of Scott's last expedition.
Creators: name: Millar, PM
Publisher: name: University Of Tasmania
Year: 2023

description: Herbert Ponting was the first professional photographer to work in Antarctica. Selected by R.F. Scott to record and document the British Antarctic Expedition (1910-13), Ponting produced over one thousand still photographs, generally considered the finest work of his career, a pioneering and acclaimed cine-film, 90¬¨‚àû South: With Scott to the Antarctic, and a successful book, The Great White South. His images of the ultimately tragic enterprise are vivid constructions of the realities of Antarctica and the expedition, as he perceived them. The images are used to illustrate many books about the expedition, but are seldom examined in any detail. This thesis aims to address this deficiency by studying relevant literature produced by Ponting and other writers, followed by an analysis of Ponting's role as 'camera artist' on the expedition, and a detailed examination of images. A visual semiotics methodology is used, based on a combination of discourse analysis (Gee 1990, 2005) and visual analysis (Kress & van Leeuwen 2006). There are 38 illustrations in the thesis. Ponting's focus is on the beauty of Antarctica, the nobility of the venture, the fineness of the men. He had a keen sense of his audience, which would in the first instance be a British one, and discourses of cultural pride flow through much of the work, a visual language which contemporary audiences would have associated with their inherited ways of being, behaving, and valuing. Interwoven themes, however, allude to darker aspects. His landscapes have resonances of the awe and power associated with the concept of the sublime. Photographs of exhausted and injured men evoke reminders of the transience of life. A connecting theme throughout the work is Ponting's expression of his own personal and professional role. A complex man who wanted close relationships, yet resisted them, he remained something of a loner, his sense of personal identity strongly merged with the professional one. In the years after Antarctica, he remained fixated on the expedition, dedicated to keeping alive the public's memory of it and its tragedy. But his achievements went beyond this. His work was an intrinsic part of that promotion of Antarctic science which was the expedition's most substantial legacy. Ponting increased contemporary knowledge of the Antarctic environment and topography, and made a direct contribution to the life sciences through his substantial depiction of wildlife in photographs and film. Ponting skillfully used techniques such as composition, lighting and tone to construct images which have stirred strong responses in viewers from his own time to the present. His place in the history of camera art is a specialised one, closely associated with Antarctica, but the best of his images endure as works of art in their own right. His work was seminal, paving the way for other fine photographers of the polar region.
Constraints on Scalar Dark Matter from Direct Experimental Searches
Creators: name: He, Xiao-Gang
name: Li, Tong
name: Li, Xue-Qian
name: Tandean, Jusak
name: Tsai, Ho-Chin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The standard model (SM) plus a real gauge-singlet scalar field dubbed darkon (SM+D) is the simplest model possessing a weakly interacting massive particle (WIMP) dark-matter candidate. The upper limits for the WIMP-nucleon elastic cross-section as a function of WIMP mass from the recent XENON10 and CDMS-II experiments rule out darkon mass ranges from 10 to (50,70,75) GeV for Higgs-boson masses of (120,200,350) GeV, respectively. This may exclude the possibility of the darkon providing an explanation for the gamma-ray excess observed in the EGRET data. We show that by extending the SM+D to a two-Higgs-doublet model plus a darkon the experimental constraints on the WIMP-nucleon interactions can be circumvented due to suppression occurring at some values of the product tan(alpha)tan(beta), with alpha being the neutral-Higgs mixing angle and tan(beta) the ratio of vacuum expectation values of the Higgs doublets. We also comment on the implication of the darkon model for Higgs searches at the LHC.
description: 15 pages, 8 figures, minor changes to match published version
Genome of the Asian corn borer Ostrinia furnacalis
Creators: name: Zhang, Feng
Publisher: name: CNGB
Year: 2023
Subjects: Genome sequencing and assembly
Monoisolate
Agricultural

description: The Asian corn borer, Ostrinia furnacalis, is a moth pest feeding on corn crops. We report a chromosome-level genome assembly using single-molecule real-time PacBio sequencing and Hi-C data.
Correlation induced electron-hole asymmetry in quasi- two-dimensional iridates
Creators: name: Pärschke, E.M.
name: Wohlfeld, K.
name: Foyevtsova, K.
name: Van Den Brink, J.
Publisher: name: London : Nature Publishing Group
Year: 2017
Subjects: subject: angular momentum
subject: asymmetry
subject: crystallography
subject: electron
subject: superconductivity
subject: motion
subject: physics
subject: 530

description: The resemblance of crystallographic and magnetic structures of the quasi-two-dimensional iridates Ba2IrO4 and Sr2IrO4 to La2CuO4 points at an analogy to cuprate high-Tc superconductors, even if spin-orbit coupling is very strong in iridates. Here we examine this analogy for the motion of a charge (hole or electron) added to the antiferromagnetic ground state. We show that correlation effects render the hole and electron case in iridates very different. An added electron forms a spin polaron, similar to the cuprates, but the situation of a removed electron is far more complex. Many-body 5d 4 configurations form which can be singlet and triplet states of total angular momentum that strongly affect the hole motion. This not only has ramifications for the interpretation of (inverse-)photoemission experiments but also demonstrates that correlation physics renders electron- and hole-doped iridates fundamentally different.
10 razões para depositar dados de investigação em repositórios
Creators: name: Pereira, Ana Alves
name: Gomes, Ana Cristina
name: Vieira, André
name: Borba, Filomena
name: Cardoso, João
name: José, Carvalho
name: Costa, Luís da
name: Carapinha, Maria João
name: Miranda, Patrícia
name: Moura, Paula
Publisher: name: Zenodo
Year: 2022
Subjects: dados de investigação
repositórios de dados

description: Este infográfico foi produzido pelos membros do Grupo de Trabalho Repositórios de Dados: Tecnologia, organização e certificação, do Fórum GDI, e tem como objetivo apresentar um conjunto de 10 razões para depositar dados de investigação em repositórios.
The environmental economic valuation for forestland and conservation in Northeast Thailand: a case study of Mong River Basin Forest
Creators: name: Apipoonyanon, C
Publisher: name: University Of Tasmania
Year: 2023

description: Both rural and urban respondents indicated the importance and value of the MRBF. The reasons why the MRBF might be of value are to help reduce the climate change, education and science, as a place for people to live, and to protect water catchment. The important issues facing the MRBF were identified as forest clearing for stock grazing and forest clearing for timber, fishing, recreation and tourism, and clearing so people can live in the forest. The main forest products that rural people collected from the MRBF are for consumption in the household and include bamboo shoots, fish, and edible mushrooms. For extra income products are bamboo shoots, edible mushrooms, and fish. The number of respondents who agree to pay was 45% while 55% disagree with supporting conservation and rehabilitation activities in the MRBF. The most common reasons offered to those who were not willing to pay were that the RFD should be responsible for fixing the problem, followed by the public already pay taxes so that the government should fix the problem. Logistic regression was used to develop a model of respondent's willingness to pay (WTP) and identify significant variables which influence their willingness to pay. Two independent variables found to be significant -the value of the forest for proving a place for people to live and for recreation and tourism. The mean WTP for urban respondents was 29 baht and median was 27 baht. There were insufficient responses from rural respondents to estimate WTP. For the combined sample of rural and urban respondents, the mean and median WTP were 26 baht and 23 baht respectively. Aggregating these results across the population as a whole yielded a mean WTP of approximately 2.8 million baht and a median of approximately 2.5 million baht. The best approach to collecting, managing and allocating this WTP were explored. It is recommended that a special trust fund be set up, to be managed by a board comprising local urban and rural representatives, as well as the Royal Forest Department. Funds would be disbursed by the board to support activities concerning conservation and rehabilitation of the MRBF.
Block Copolymers Featuring Highly Photostable Photoacids Based on Vinylnaphthol: Synthesis and Self-Assembly
Creators: name: Wendler, Felix
name: Tom, Jessica C.
name: Sittig, Maria
name: Biehl, Philip
name: Dietzek, Benjamin
name: Schacher, Felix H.
Publisher: name: Weinheim : Wiley-VCH
Year: 2020
Subjects: subject: amphiphilic block copolymers
subject: light-responsive materials
subject: photoacids
subject: RAFT
subject: self-assembly
subject: 540

description: The synthesis of a photoresponsive amphiphilic diblock quarterpolymer containing 5-vinyl-1-naphthol (VN) as a photostable photoacidic comonomer is presented. The preparation is realized via a sequential reversible addition fragmentation chain transfer (RAFT) polymerization starting from a nona(ethylene glycol) methyl ether methacrylate (MEO9MA/“O”) hydrophilic block, which is then used as a macro-RAFT agent in the terpolymerization of styrene (S), 2-vinylpyridine (2VP), and TBS-protected VN (tVN). The terpolymerization proceeds in a controlled fashion and two diblock quarterpolymers, P(Om)-b-P(Sx-co-2VPy-co-VNz), with varying functional comonomer compositions are prepared. These diblock quarterpolymers form spherical core-corona micelles in aqueous media according to dynamic light scattering (DLS) and cryogenic transmission electron microscopy (cryo-TEM). Upon irradiation, the photoacids within the micellar core experience a drastic increase in acidity causing a proton transfer from the photoacid to neighboring 2VP units. As a result, the hydrophilic/hydrophobic balance of the entire assembly is shifted, and the encapsulated cargo is released. © 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Markov Chain Monte Carlo Estimation of Quantum States
Creators: name: DiGuglielmo, James
name: Messenger, Chris
name: Fiurasek, Jaromir
name: Hage, Boris
name: Samblowski, Aiko
name: Schmidt, Tabea
name: Schnabel, Roman
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We apply a Bayesian data analysis scheme known as the Markov Chain Monte Carlo (MCMC) to the tomographic reconstruction of quantum states. This method yields a vector, known as the Markov chain, which contains the full statistical information concerning all reconstruction parameters including their statistical correlations with no a priori assumptions as to the form of the distribution from which it has been obtained. From this vector can be derived, e. g. the marginal distributions and uncertainties of all model parameters and also of other quantities such as the purity of the reconstructed state. We demonstrate the utility of this scheme by reconstructing the Wigner function of phase-diffused squeezed states. These states posses non-Gaussian statistics and therefore represent a non-trivial case of tomographic reconstruction. We compare our results to those obtained through pure maximum-likelihood and Fisher information approaches.
description: 8 pages, 8 figures. Accepted for publication in Phys. Rev. A
Color fluctuation approximation for multiple interactions in leading twist theory of nuclear shadowing
Creators: name: Guzey, V.
name: Strikman, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The leading twist theory of nuclear shadowing predicts the shadowing correction to nuclear parton distributions at small $x$ by connecting it to the leading twist hard diffraction in electron-nucleon scattering. The uncertainties of the predictions are related to the shadowing effects resulting from the interaction of the hard probe with $N \ge 3$ nucleons. We argue that the pattern of hard diffraction observed at HERA allows one to reduce these uncertainties. We develop a new approach to the treatment of these multiple interactions, which is based on the concept of the color fluctuations and accounts for the presence of both point-like and hadron-like configurations in the virtual photon wave function. Using the developed framework, we update our predictions for the leading twist nuclear shadowing in nuclear parton distributions of heavy nuclei at small $x$.
description: 16 pages, 4 figures. Revised to address the Referee's comments. Matches the published version, PLB 687 (2010) 167.
title: Grundlagen des Erhalts elektronischer Musikinstrumente am Beispiel der Toccata-Orgel
Creators: name: Kaminski, Anne-Katrin
Publisher: name: Hochschule für Technik und Wirtschaft Berlin
Year: 2020

description: Inhalt dieser Arbeit ist eine theoretische Auseinandersetzung mit der Restaurierung elektronischer Musikinstrumente. Auf Basis historischer Recherchen zu Entstehung und Entwicklung der Instrumentengruppe, sowie eines wissenschaftlichen Hintergrundes aus den Bereichen der Musikinstrumenten- und Technikrestaurierung wird entlang eines Beispielinstruments erarbeitet, wie der Erhalt von elektronischen Musikinstrumenten aussehen könnte. Von besonderer Bedeutung sind dabei die Aussagen von Zeitzeugen zum Instrument und seiner Geschichte sowie die ausführliche fotografische Dokumentation im Anhang.
description: Content of this work is the theoretical discussion of the restoration of electronic musical instruments. The basis is a historical research on the origin and development of this family of instruments. Through the exploration of the scientific background of the conservation of musical instruments and technical heritage an idea for the preservation of a sample instrument is developed. Of particular importance are the statements of eyewitnesses to the instruments construction and its history as well as the detailed photographic documentation in the appendix.
A New Global Embedding Approach to Study Hawking and Unruh Effects
Creators: name: Banerjee, Rabin
name: Majhi, Bibhas Ranjan
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A new type of global embedding of curved space-times in higher dimensional flat ones is introduced to present a unified description of Hawking and Unruh effects. Our analysis simplifies as well as generalises the conventional embedding approach.
description: Latex, 7 pages, no figure, title modified, paper shortened, section-4 omitted, to appear in Phys. Lett. B
Thermodynamical control of soliton dynamics in liquid-core fibers
Creators: name: Chemnitz, Mario
name: Gaida, Christian
name: Gebhardt, Martin
name: Stutzki, Fabian
name: Kobelke, Jens
name: Tünnermann, Andreas
name: Limpert, Jens
name: Schmidt, Markus A.
Publisher: name: Washington D.C. : Optical Society of America
Year: 2018
Subjects: subject: fibers
subject: infrared
subject: materials
subject: 620

description: Liquid-core fibers offer local external control over pulse dispersion due to their strong thermodynamic response, offering a new degree of freedom in accurate soliton steering for reconfigurable nonlinear light generation. Here, we show how to accurately control soliton dynamics and supercontinuum generation in carbon disulfide/silica fibers by temperature and pressure tuning, monitored via the spectral location and the onset energy of non-solitonic radiation. Simulations and phase-matching calculations based on an extended thermodynamic dispersion model of carbon disulfide confirm the experimental results, which allows us to demonstrate the potential of temperature detuning of liquid-core fibers for octave spanning recompressible supercontinuum generation in the near-infrared.
XXI ASRDA ZAMONAVIY DASTURLAR BILAN INGLIZ TILINI O'RGANISH
Creators: name: Ubaydullayeva Sevinch Akbar qizi Samarqand davlat chet tillari instituti talabasi
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada hozirgi davrda ishlab chiqilayotgan yangi dasturlar orqali ingliz tilini o’rganish haqida ma’lumot beriladi.

                                                  KALIT SO’ZLAR

Chet tili, DUOLINGO ENGLISH,MEMRISE,tilga qiziqish, foydali dasturlar.
High resolution X-ray spectroscopy of the Seyfert 1 Mrk841: insights into the warm absorber and warm emitter
Creators: name: Longinotti, A. L.
name: Costantini, E.
name: Petrucci, P. O.
name: Boisson, C.
name: Mouchet, M.
name: Santos-Lleo, M.
name: Matt, G.
name: Ponti, G.
name: Goncalves, A. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Seyfert 1 galaxy Mrk841 was observed five times between 2001 and 2005 by the XMM-Newton X-ray observatory. The source is well known for showing spectral complexity in the variable iron line and in the soft X-ray excess. This paper reports on the first study of Mrk841 soft X-ray spectrum at high spectral resolution. The availability of multiple exposures obtained by the Reflection Grating Spectrometer (RGS) cameras allows a thorough study of the complex absorption and emission spectral features in the soft X-ray band.The three combined exposures obtained in January 2001 and the two obtained in January and July 2005 were analysed using the SPEX software. We detect a two-phase warm absorber: a medium ionisation component (logxi~1.5-2.2 ergs s cm^{-1}) is responsible for a deep absorption feature in the Unresolved Transition Array of the Fe M-shell and for several absorption lines in the OVI-VIII band; a higher ionisation phase with logxi~3 ergs s cm^{-1} is required to fit absorption in the NeIX-X band. The ionisation state and the column density of the gas present moderate variation from 2001 to 2005 for both phases. The high ionisation component of the warm absorber has no effect in the Fe K band. No significant velocity shift of the absorption lines is measured in the RGS data. Remarkably, the 2005 spectra show emission features consistent with photoionisation in a high density (n_e>10^{11} cm^{-3}) gas: a prominent OVII line triplet is clearly observed in January 2005 and narrow Radiative Recombination Continua (RRC) of OVII and CVI are observed in both 2005 data sets. A broad Gaussian line around 21.7 Angstrom is also required to fit all the data sets. The derived radial distance for the emission lines seems to suggest that the photoionisation takes place within the optical Broad Line Region of the source.
description: In press on A&A, replaced version includes language editing and typo on velocities corrected in Table 2
Non-BPS Black Rings and Black Holes in Taub-NUT
Creators: name: Bena, Iosif
name: Dall'Agata, Gianguido
name: Giusto, Stefano
name: Ruef, Clement
name: Warner, Nicholas P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We solve the recently-proposed equations describing non-BPS extremal multi-center configurations, and construct explicit solutions describing non-supersymmetric extremal black rings in Taub-NUT, as well as the seed solution for the most general extremal non-BPS under-rotating black hole in four dimensions. We also find solutions that contain both a black hole and a black ring, which descend to four-dimensional extremal non-BPS two-center black holes with generic charges.
description: 26 pages, LaTeX
Additional file 2: of Targeted next-generation sequencing identification of mutations in patients with disorders of sex development
Creators: name: Dong, Yanling
name: Yi, Yuting
name: Yao, Hong
name: Yang, Ziying
name: Hu, Huamei
name: Liu, Jiucheng
name: Gao, Changxin
name: Zhang, Ming
name: Zhou, Liying
name: Asan
name: Yi, Xin
name: Liang, Zhiqing
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Quality metrics generated using YH genome sequencing data. (DOC 18.4 kb)
FLIm and raman spectroscopy for investigating biochemical changes of bovine pericardium upon genipin cross-linking
Creators: name: Shaik, Tanveer Ahmed
name: Alfonso-Garcia, Alba
name: Richter, Martin
name: Korinth, Florian
name: Krafft, Christoph
name: Marcu, Laura
name: Popp, Jürgen
Publisher: name: Basel : MDPI
Year: 2020
Subjects: subject: Cross-linking
subject: FLIm
subject: Genipin
subject: Raman spectroscopy
subject: Tissue engineering
subject: 540

description: Biomaterials used in tissue engineering and regenerative medicine applications benefit from longitudinal monitoring in a non-destructive manner. Label-free imaging based on fluorescence lifetime imaging (FLIm) and Raman spectroscopy were used to monitor the degree of genipin (GE) cross-linking of antigen-removed bovine pericardium (ARBP) at three incubation time points (0.5, 1.0, and 2.5 h). Fluorescence lifetime decreased and the emission spectrum redshifted compared to that of uncross-linked ARBP. The Raman signature of GE-ARBP was resonance-enhanced due to the GE cross-linker that generated new Raman bands at 1165, 1326, 1350, 1380, 1402, 1470, 1506, 1535, 1574, 1630, 1728, and 1741 cm-1. These were validated through density functional theory calculations as cross-linker-specific bands. A multivariate multiple regression model was developed to enhance the biochemical specificity of FLIm parameters fluorescence intensity ratio (R2 = 0.92) and lifetime (R2 = 0.94)) with Raman spectral results. FLIm and Raman spectroscopy detected biochemical changes occurring in the collagenous tissue during the cross-linking process that were characterized by the formation of a blue pigment which affected the tissue fluorescence and scattering properties. In conclusion, FLIm parameters and Raman spectroscopy were used to monitor the degree of cross-linking non-destructively. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.