cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Visualizing the emergence of the pseudogap state and the evolution to superconductivity in a lightly hole-doped Mott insulator
Creators: name: Kohsaka, Y.
name: Hanaguri, T.
name: Azuma, M.
name: Takano, M.
name: Davis, J. C.
name: Takagi, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Superconductivity emerges from the cuprate antiferromagnetic Mott state with hole doping. The resulting electronic structure is not understood, although changes in the state of oxygen atoms appear paramount. Hole doping first destroys the Mott state yielding a weak insulator where electrons localize only at low temperatures without a full energy gap. At higher doping, the 'pseudogap', a weakly conducting state with an anisotropic energy gap and intra-unit-cell breaking of 90\degree-rotational (C4v) symmetry appears. However, a direct visualization of the emergence of these phenomena with increasing hole density has never been achieved. Here we report atomic-scale imaging of electronic structure evolution from the weak-insulator through the emergence of the pseudogap to the superconducting state in Ca2-xNaxCuO2Cl2. The spectral signature of the pseudogap emerges at lowest doping from a weakly insulating but C4v-symmetric matrix exhibiting a distinct spectral shape. At slightly higher hole-density, nanoscale regions exhibiting pseudogap spectra and 180\degree-rotational (C2v) symmetry form unidirectional clusters within the C4v-symmetric matrix. Thus, hole-doping proceeds by the appearance of nanoscale clusters of localized holes within which the broken-symmetry pseudogap state is stabilized. A fundamentally two-component electronic structure11 then exists in Ca2-xNaxCuO2Cl2 until the C2v-symmetric clusters touch at higher doping, and the long-range superconductivity appears.
description: See the Nature Physics website for the published version available at http://dx.doi.org/10.1038/Nphys2321
An Exercise in Invariant-based Programming with Interactive and Automatic Theorem Prover Support
Creators: name: Back, Ralph-Johan
name: Eriksson, Johannes
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Invariant-Based Programming (IBP) is a diagram-based correct-by-construction programming methodology in which the program is structured around the invariants, which are additionally formulated before the actual code. Socos is a program construction and verification environment built specifically to support IBP. The front-end to Socos is a graphical diagram editor, allowing the programmer to construct invariant-based programs and check their correctness. The back-end component of Socos, the program checker, computes the verification conditions of the program and tries to prove them automatically. It uses the theorem prover PVS and the SMT solver Yices to discharge as many of the verification conditions as possible without user interaction. In this paper, we first describe the Socos environment from a user and systems level perspective; we then exemplify the IBP workflow by building a verified implementation of heapsort in Socos. The case study highlights the role of both automatic and interactive theorem proving in three sequential stages of the IBP workflow: developing the background theory, formulating the program specification and invariants, and proving the correctness of the final implementation.
description: In Proceedings THedu'11, arXiv:1202.4535
An Ultra-Low Noise, Fully Differential Active Reset CMOS Imager with Transistor Based Column Parallel Common Mode Feedback for Spectrally Constructed Background Illumination Rejection
Creators: name: Shahin, Saharnaz
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Engineering
subject: Engineering--Electronics and Electrical
subject: Imager
subject: Sensor
subject: Common Mode Feedback
subject: Fully Differential Amplifier
subject: Photodiode
subject: CMOS Image Sensor

description: An ultra-low noise, ultra-sensitive fully differential CMOS imager for background illumination rejection is presented. Fabricated by TSMC35 technology, the pixel is able to detect very low light signals and discern them from backgrounds exceeding their intensity. Measurements indicate a common mode rejection ratio (81.6 dB), very high sensitivity (200 V/Lux.s), and noise floor of 4 electrons. Obtained figures agree with theoretical assessments and simulations, proving the pixel to be a basis of a sensing element in ultra-sensitive continuous time or gated applications. As a second contribution, to stabilize the DC output, a transistor based common mode feedback (CMFB) is added (AMSp35 technology). By moving the load and CMFB to column periphery, number of transistors per pixel have reduced to 12, and improvements in pixel size and fill factor are achieved. Simulations promise a functional imager with high gain (50 dB) and noise floor of 98 µV.
Field Theory On The World Sheet: Improvements And Generalizations
Creators: name: Bardakci, Korkut
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This article is the continuation of a project of investigating planar phi^3 model in various dimensions. The idea is to reformulate them on the world sheet, and then to apply the classical (meanfield) approximation, with two goals: To show that the ground state of the model is a solitonic configuration on the world sheet, and the quantum fluctuations around the soliton lead to the formation of a transverse string. After a review of some of the earlier work, we introduce and discuss several generalizations and new results. In 1+2 dimensions, a rigorous upper bound on the solitonic energy is established. A phi^4 interaction is added to stabilize the original phi^3 model. In 1+3 and 1+5 dimensions, an improved treatment of the ultraviolet divergences is given. And significantly, we show that our approximation scheme can be imbedded into a systematic strong coupling expansion. Finally, the spectrum of quantum fluctuations around the soliton confirms earlier results: In 1+2 and 1+3 dimensions, a transverse string is formed on the world sheet.
description: 29 pages, 5 figures, several typos and eqs.(74) and (75) are corrected, a comment added to section 9
On the destruction of minimal foliations
Creators: name: Mramor, Blaz
name: Rink, Bob
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Monotone variational recurrence relations such as the Frenkel-Kontorova lattice, arise in solid state physics, conservative lattice dynamics and as Hamiltonian twist maps. For such recurrence relations, Aubry-Mather theory guarantees the existence of solutions of every rotation number. They are the action minimizers that constitute the Aubry-Mather set. When the rotation number is irrational, the Aubry-Mather set is either connected or a Cantor set. A connected Aubry-Mather set is called a minimal foliation. In the case of twist maps, it describes an invariant circle, while in solid state physics it corresponds to a continuum of ground states. A Cantor Aubry-Mather set is called a minimal lamination. In this paper we prove that when the rotation number of a minimal foliation is either rational or easy to approximate by rational numbers, then the foliation can be destroyed into a lamination by an arbitrarily small smooth perturbation of the recurrence relation. This generalizes a theorem of Mather for twist maps to general recurrence relations.
Double real radiation corrections to $t\bar{t}$ production at the LHC: the all-fermion processes
Creators: name: Abelof, Gabriel
name: Ridder, Aude Gehrmann--De
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the double real radiation corrections to the hadronic $t \bar{t}$ production stemming from partonic processes with fermions only. For this purpose, we extend the NNLO antenna subtraction formalism developed originally for the computation of jet observables in $e^+e^-$ annihilation to include the evaluation of hadronic observables involving a massive pair of particles. In all partonic processes, we checked the validity of our subtraction terms given for leading and subleading colour contributions numerically by showing that the ratio between real radiation matrix elements and subtraction terms approaches unity in all single and double unresolved configurations.
description: 68 pages, 9 figures
Control of unstable steady states in neutral time-delayed systems
Creators: name: Blyuss, K. B.
name: Kyrychko, Y. N.
name: Hoevel, P.
name: Schoell, E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present an analysis of time-delayed feedback control used to stabilize an unstable steady state of a neutral delay differential equation. Stability of the controlled system is addressed by studying the eigenvalue spectrum of a corresponding characteristic equation with two time delays. An analytic expression for the stabilizing control strength is derived in terms of original system parameters and the time delay of the control. Theoretical and numerical results show that the interplay between the control strength and two time delays provides a number of regions in the parameter space where the time-delayed feedback control can successfully stabilize an otherwise unstable steady state.
description: 11 pages, 8 figures
A Spatial Approach to Biodiversity Planning in the Calgary Region
Creators: name: Hiebert, Lynette
Publisher: name: Environmental Design
Year: 2017
Subjects: subject: Geography
subject: Urban and Regional Planning
subject: FOS: Social and economic geography
subject: Ecology
subject: FOS: Biological sciences
subject: spatial biodiversity
subject: land use planning
subject: urban regions
subject: connectivity
subject: Calgary Metropolitan Region

description: In the Calgary region of southwestern Alberta, sustained growth pressure and land use change have had cumulative effects on the regional landscape including habitat and species diversity. The Calgary Metropolitan Plan (2014) has identified the value of maintaining regional biodiversity in future land use planning. However, the challenge of moving from policy to implementation is complicated because species-based management approaches do not fit easily within municipal land use planning under the Alberta Municipal Government Act (2015) which is focused on land development. This thesis proposes a spatial approach to biodiversity based on landscape connectivity and landscape structure and function at a regional scale that is more compatible with municipal and regional land use planning. A spatial approach connects species specific habitats to spatial landscape factors and can be applied at multiple scales.
Serrated Polyps of the Colon and Rectum: Clinicopathological Features
Creators: name: Sano, Wataru
name: Daizen Hirata
name: Teramoto, Akira
name: Iwatate, Mineo
name: Hattori, Santa
name: Fujita, Mikio
name: Sano, Yasushi
Publisher: name: Zenodo
Year: 2021
Subjects: Hyperplastic polyp
sessile serrated adenoma/polyp
sessile serrated lesion
traditional serrated adenoma
cytological dysplasia
cryptal dysplasia

description: The serrated neoplasia pathway, in which serrated polyps develop as colorectal cancer, has received a lot of interest in recent years as a new carcinogenic process. Hyperplastic polyps (HPs), sessile serrated lesions, and classic serrated adenomas are histopathologically characterised colorectal serrated polyps; the latter two are considered premaligna in the serrated neoplasia pathway. Apart from diminutive rectosigmoid HPs, all colorectal polyps, including serrated polyps, are removed in Western countries. The treatment strategy for colorectal serrated polyps in Asian countries, on the other hand, has remained unestablished. As a result, we detailed the clinicopathological aspects of colorectal serrated polyps in this review and recommended eliminating HPs and sessile serrated lesions ≥ 6 mm in size, as well as traditional serrated adenomas of any size.
Street Gangs, Outlaw Bikers, the Mafia and the Mexican Cartels: Dynamics of Transnational Organized Crime and Drug Trafficking in Canada
Creators: name: Gaudig-Rueger, Steffen
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: History--Modern
subject: Military Studies
subject: Criminology and Penology
subject: Crime
subject: Cocaine
subject: Mennonites
subject: Trafficking
subject: Organized
subject: Mexico
subject: Cartel
subject: Drugs
subject: Violence
subject: Canada
subject: Migration
subject: Sinaloa
subject: Gangs

description: Over the last few years, Mexican organizations active in the cocaine trade have chosen to stop working through Canadian middlemen and have instead established a direct presence in Canada. What factors have facilitated this decision? How is it likely to affect the dynamics of the transnational drug trade in Canada? It appears that the decision to stop working through middlemen can be traced back to a relative contemporary weakness of Canadian organized crime groups that traditionally handled the Canadian distribution. Further, a convenient network opportunity for direct expansion into Canada has presented itself to the cartels in the form of recently immigrated Mexican-Canadian Mennonites, some of whom have long acted as Mexican cartel-agents. Despite the fearsome reputation of Mexican cartels, there has been no noticeable increase in drug-related violence in Canada, and it is highly unlikely that they will bring Mexico-style violence to Canada with them in the near-term.
Assessing Fruit Peel Fiber's Utilization and Efficiency in Sustainable Paper Production: A Comprehensive Analysis of Lignin Content and pH Levels to its Physical Properties
Creators: name: Dharma, Megumi Susilo
Publisher: name: Zenodo
Year: 2023
Subjects: Material Science
Sustainability
Sustainable
Chemistry
Lignin
Kraft Pulping Process
Environment
Fruit Peel Paper
Paper-making
Glycosidic bonds
pH

description: Abstract
This research aims to investigate the potential correlation of a fruit peel's lignin content and pH level to the paper produced from it, in hopes to optimize the paper industry's efficiency and sustainability by identifying the most suitable raw material (in this case, waste fruit peel) for each kind of paper production. 
For this experiment, banana (Musa paradisiaca), apple (Malus domestica), orange (Citrus sinensis), papaya (Carica papaya), grape (Vitis vinifera), and kiwi (Actinidia deliciosa) peels were utilized to give a proper variety of pH levels and lignin contents towards the formation of paper. There are 2 stages in making the fruit peel paper, first is the making of the pulp and second is the making of the paper itself.
To make the pulp, equal masses of fruit peels were boiled separately, first in a solution of water and baking soda, and afterwards only in water for 15 minutes each. Then, they were blended with waste paper that had been soaked in hot water with a ratio of 1:1, along with 50 ml of hot water and sieved. 
For the making of the paper, 5g of each fruit pulp was flattened on a surface of equal areas, dabbed with a towel and then left outside to dry under the sun for 2 days. Each paper's physical properties were then tested and compared with their respective lignin content and pH levels. The results showed that the lignin content of a fruit is proportional to the paper's stiffness and water absorbance ability, while its pH level did not have an effect.
Near-infrared properties of asymptotic giant branch stars in nearby dwarf elliptical Galaxy NGC 205
Creators: name: Jung, M. Y.
name: Ko, Jongwan
name: Kim, Jae-Woo
name: Chun, Sang-Hyun
name: Kim, Ho-Il
name: Sohn, Y. -J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigated the distribution of resolved asymptotic giant branch (AGB) stars over a much larger area than covered by previous near-infrared studies in the nearby dwarf elliptical galaxy NGC 205. Using data obtained with the WIRCam near-infrared imager of the CFHT, we selected the AGB stars in the JHKs color-magnitude diagrams, and separated the C stars from M-giant stars in the JHKs color-color diagram. We identified 1,550 C stars in NGC 205 with a mean absolute magnitude of M_Ks = -7.49 \pm 0.54, and colors of (J - Ks) = 1.81 \pm 0.41 and (H - Ks) = 0.76 \pm 0.24. The ratio of C stars to M-giant stars was estimated to be 0.15 \pm 0.01 in NGC 205, and the local C/M ratios for the southern region are somewhat lower than those for the northern region. The (J - Ks) color distributions of AGB stars contain the main peak of the M-giant stars and the red tail of the C stars. A comparison of the theoretical isochrone models with the observed color distribution indicates that most of the bright M-giant stars in NGC 205 were formed at log(t_yr) \sim 9.0-9.7. The logarithmic slope of the M_Ks luminosity function for M-giant stars was estimated to be 0.84 \pm 0.01, which is comparable with dwarf elliptical galaxies NGC 147 and NGC 185. Furthermore, we found that the logarithmic slopes of the M_Ks luminosity function for C and M-giant stars are different to places, implying a different star formation history within NGC 205. The bolometric luminosity function for M-giant stars extends to M_bol = -6.0 mag, and that for C stars spans -5.6 < M_bol < -3.0. The bolometric luminosity function of C stars is unlikely to be a Gaussian distribution and the mean bolometric magnitude of C stars is estimated to be M_bol = -4.24 \pm 0.55, which is consistent with our results for dwarf elliptical galaxies NGC 147 and NGC 185.
description: 11 pages, 11 figures, accepted for publication in A&A
Interaction between characters in Heike monogatari dialogues: language forms and functions
Creators: name: Lushchenko, Alexey
Publisher: name: University of British Columbia
Year: 2010

description: This thesis examines language aspects of interaction in dialogue passages of Heike monogatari (The Tale of the Heike, 1371) focusing on the role of language forms in characterization. The main goal of the present study is to assess the role of language variation and analyze how it participates in construction of asymmetries in social status and power between characters. Selected dialogue data is divided into two groups according to the participants and the dominant context: political interaction at court and interaction involving religious matters. Analysis of language forms in each dialogue draws on research by Japanese scholars and covers a wide range of linguistic phenomena such as sound changes, lexical choices, and markers of politeness. Linguistic findings are intended to supplement recent studies of the literary, socio-political, and religious contexts for early medieval narratives. By selecting a specific language style for each interacting character, the author(s) constructed particular images that have shaped audience’s perceptions of the characters. This study brings attention to language variation and clarifies how the socio-political status of characters, their interpersonal relations, and attitudes toward each other are encoded in the language of Heike monogatari dialogues. As such, this study is perhaps the first attempt in English to adopt a sociolinguistic approach to a Japanese pre-modern text, focusing on language properties and shifts in style in Heike monogatari.
Accounting of DAC
Creators: name: Honegger, Matthias
Publisher: name: Zenodo
Year: 2023
Subjects: MRV Methodologies and Accounting Issues
Accounting
WP2.2.1

description: Lack of clarity where (which sub-sector) DAC is reported in GHG inventories Other issues this affects: Accounting Readiness Liability in Hubs Accounting of leakage Accounting of BECCS
Do you speak rights retention and open licensing?
Creators: name: Labastida, Ignasi
name: Riera-Quintero, Clara
Publisher: name: Zenodo
Year: 2023

description: Short glossary containing the main concepts related to Rights Retention and Open Licensing developed by Project Retain led by SPARC Europe. This is part of the Knowledge Rights 21 programme.  
This project was funded by Arcadia – a charitable fund of Lisbet Rausing and Peter Baldwin.
Traumatic Femur Fracture Five Year Survival Analysis: A Retrospective Cohort Study in a Local General Orthopaedic Centre
Creators: name: Seng, WONG Vei
name: ANUAR Amalina
name: Xiang, LEONG Jie
name: Addi, SYED OTHMAN Syed
Publisher: name: Zenodo
Year: 2021
Subjects: Traumatic femoral fractures
predictors for survival
Orthopaedic emergencies
mortality
surgical treatment

description: Introduction:
 Traumatic femoral fractures are principally Orthopaedic emergencies requiring surgical management. Yet, some patients opt for a non-invasive alternative. This study aims to analyze the five-year survival and predictors for survival between operatively and non-operatively treated femoral fractures in a local general Orthopaedic Centre. Methodology:
 This cross-sectional study involves retrospective review of 142 medical records of inpatients treated by Orthopaedic Department, Hospital Tuanku Fauziah, Perlis between 1st January 2013 and 31st December 2013. Patient's five-year survival status was obtained from the national registry. Results:
 Patients were generally Malay (n=123,86.0%), men (n=86,60.6%), aged 44.6 (±25.9) years old, with proximal femur fractures (n=60,42.3%) and managed operatively (n=124,87.3%) using intramedullary devices (n=45,31.7%). Kaplan-Meier survival analysis utilizing Log-Rank test revealed an overall femoral fracture five-year survival of 77.5% and significant difference in survival experience between operatively treated (80.6%) and non-operatively treated (55.6%) patients, p=0.001. Proximal femur fracture patients had lower five-year survival (53.3%) compared to non-proximal femur fractures (p<0.001). Age (AdjHR=1.05,95% CI:1.03-1.06,p<0.001) and type of management (non-operatively treated AdjHR=2.31,95% CI:1.10-4.85,p=0.028) were significant prognostic factors for mortality following femur fracture. Sub-analysis revealed patients with proximal femur fractures were mostly female (n=37,61.7%), Malays (n=46,76.7%) with median (IQR) age of 73.5 (18.0) years old, managed operatively (n=45,81.7%) via screw fixation (n=19,31.7%) and if operatively treated, had significantly higher five-year survival (57.1%) compared to those not operatively treated (36.4%), p=0.050. Identifiable factor for mortality post proximal femoral fracture was age (HR=1.03,95% CI:1.00-1.06,p=0.044). Discussion/Conclusion:
 Age and type of management had significant impact on survival of patients post femoral fracture. Small sample size of proximal femur fractures impeded further sub-analysis. Disclaimer: Abstract text might vary slightly from what is displayed in the e-poster.
description: This poster was submitted to the 14th National Conference for Clinical Research (NCCR) in August 18-20, 2021. https://nccrconference.com.my/
Enhancing Wireless Received Signal Strength-based Indoor Location Systems
Creators: name: Li, Yuqi
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Engineering
subject: Engineering--Electronics and Electrical
subject: Indoor-positioning
subject: RSS
subject: Security-camera
subject: Map-matching

description: The ever-growing demand for Location Based Services has significantly boosted the research and development need for indoor positioning systems. Of various indoor positioning solutions, techniques making use of Received Signal Strength (RSS) of wireless signals of opportunity have gained extensive interest due to the ubiquitous wireless signal infrastructure and the readily available RSS measurements with standard mobile devices. However, the performance of RSS-based indoor positioning systems is highly affected by significant uncertainties in RSS due to many factors affecting wireless propagations. To enhance the performance of an RSS-based indoor positioning system, from a Bayesian filtering theory perspective, a better estimation of the a posteriori distribution of position is needed. This can be done through a better modelling of RSS measurements to mitigate uncertainties and/or incorporating prior information. This thesis specifically explores mitigating RSS uncertainties by modelling those due to human body shadowing and incorporating prior information from widely available security cameras and building maps. The characterization of RSS measurements indoors is first demonstrated using data collected in various environments. Experimental results characterize the RSS sensitivity to location and the uncertainty incurred by body shadowing effects on RSS measurements. Based on the characterization, an empirical model with a small number of parameters estimated from training data is proposed to model the RSS loss due to body shadowing. An estimator based on this model is proposed to improve positioning. Experimental results show that when the user heading is known, the positioning obviously improves. When the heading is unknown, and thus needs to be jointly estimated, the improvement becomes less apparent. This thesis then investigates the use of security cameras and building maps to enhance RSS-based positioning. An estimator based on computer vision processing is proposed to estimate user’s heading in corridors. Based on this, a camera-aided RSS system based on Kalman-filter is proposed and it is experimentally shown that a 37.5% improvement in horizontal position estimation occurs. To further incorporate building map information, a map-camera-aided RSS system based on particle filters is proposed. Experimental results indicate that the use of map constraints further bring 44.4% improvement in the across track direction.
Teleportation of the one-qubit state in decoherence environments
Creators: name: Hu, Ming-Liang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study standard quantum teleportation of one-qubit state for the situation in which the channel is subject to decoherence, and where the evolution of the channel state is ruled by a master equation in the Lindblad form. A detailed calculation reveals that the quality of teleportation is determined by both the entanglement and the purity of the channel state, and only the optimal matching of them ensures the highest fidelity of standard quantum teleportation. Also our results demonstrated that the decoherence induces distortion of the Bloch sphere for the output state with different rates in different directions, which implies that different input states will be teleported with different fidelities.
description: 17 pages, 10 figures
The Bicameral Cache: a split cache for vector architectures
Creators: name: Rebolledo, Susana
name: Perez, Borja
name: Bosque, Jose Luis
name: Hsu, Peter
Publisher: name: arXiv
Year: 2024
Subjects: subject: Hardware Architecture (cs.AR)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: The Bicameral Cache is a cache organization proposal for a vector architecture that segregates data according to their access type, distinguishing scalar from vector references. Its aim is to avoid both types of references from interfering in each other's data locality, with a special focus on prioritizing the performance on vector references. The proposed system incorporates an additional, non-polluting prefetching mechanism to help populate the long vector cache lines in advance to increase the hit rate by further exploiting the spatial locality on vector data. Its evaluation was conducted on the Cavatools simulator, comparing the performance to a standard conventional cache, over different typical vector benchmarks for several vector lengths. The results proved the proposed cache speeds up performance on stride-1 vector benchmarks, while hardly impacting non-stride-1's. In addition, the prefetching feature consistently provided an additional value.
description: 9 pages, 5 figures
Energy Transfer Rate in Double-Layer Graphene Systems: Linear Regime
Creators: name: Bahrami, B.
name: Vazifehshenas, T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate theoretically the energy transfer phenomenon in a double-layer graphene (DLG) system in which two layers are coupled due to the Coulomb interlayer interaction without appreciable interlayer tunneling. We use the balance equation approach and the dynamic and temperature dependent random phase approximation (RPA) screening function in our calculations to obtain the rates of energy transfer between two graphene layers at different layer electron temperatures, densities and interlayer spacings and compare the results with those calculated for the conventional double-layer two-dimensional electron gas (2DEG) systems. In addition, we study the effect of changing substrate dielectric constant on the rate of energy transfer. The general behavior of the energy transfer rate in the DLG is qualitatively similar to that obtained in the double-layer 2DEG but quantitatively its DLG values are an order of magnitude greater. Also, at large electron temperature differences between two layers, the electron density dependence of the energy transfer for the DLG system is significantly different from that found for the double-layer 2DEG system, particularly in case of unequal layer electron densities.
description: 12 pages,4 figures
Checklist for Institutional policymakers: 5 steps to implement an institutional rights retention policy
Creators: name: Ignasi Labastida
name: Iva Melinščak Zlodi
name: Vanessa Proudman
name: Clara Riera
name: Jon Treadway
Publisher: name: Zenodo
Year: 2023
Subjects: Rights retention
Open Access
Institutional Policymaking
Infographic

description: This checklist is to support institutional policymakers. It is part of the RetainYourRights campaign from Project Retain, led by SPARC Europe as part of the Knowledge Rights 21 Programme.

This project was funded by Arcadia – a charitable fund of Lisbet Rausing and Peter Baldwin.
Automatic Deduction in Dynamic Geometry using Sage
Creators: name: Botana, Francisco
name: Abánades, Miguel A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Software (cs.MS)
subject: Symbolic Computation (cs.SC)
subject: FOS: Computer and information sciences

description: We present a symbolic tool that provides robust algebraic methods to handle automatic deduction tasks for a dynamic geometry construction. The main prototype has been developed as two different worksheets for the open source computer algebra system Sage, corresponding to two different ways of coding a geometric construction. In one worksheet, diagrams constructed with the open source dynamic geometry system GeoGebra are accepted. In this worksheet, Groebner bases are used to either compute the equation of a geometric locus in the case of a locus construction or to determine the truth of a general geometric statement included in the GeoGebra construction as a boolean variable. In the second worksheet, locus constructions coded using the common file format for dynamic geometry developed by the Intergeo project are accepted for computation. The prototype and several examples are provided for testing. Moreover, a third Sage worksheet is presented in which a novel algorithm to eliminate extraneous parts in symbolically computed loci has been implemented. The algorithm, based on a recent work on the Groebner cover of parametric systems, identifies degenerate components and extraneous adherence points in loci, both natural byproducts of general polynomial algebraic methods. Detailed examples are discussed.
description: In Proceedings THedu'11, arXiv:1202.4535
In vitro Generation of Human Adipose Derived Mesenchymal Stromal Cells Using α –MEM and DMEM
Creators: name: Vanikar, Aruna V.
name: Chetan N. Patel
name: Kunal S. Gupte1
name: Umang G. Thakkar
Publisher: name: Zenodo
Year: 2021
Subjects: Alpha modified minimum essential medium
Dulbecco's modified Eagle's medium
Mesenchymal stromal cells
Flow cytometry

description: The basic media for cell culture are α-MEM and DMEM. α-MEM has lesser and rather optimal glucose and amino acid concentration as compared to DMEM. In our current study we compared the individual effect of these two media on quantity, viability and immunophenotyping of AD-MSC. Adipose tissue was procured from anterior abdominal wall of healthy willing donors. It was divided equally into two tissue culture flasks with culture medium, one containing α-MEM and the other containing DMEM. It was incubated in collagenase-I. Pellet was re-suspended in centrifuge tubes with phosphate buffered saline and divided into 6 equal parts. Each set was incubated separately for in-vitro generation in 6-well plates. Media were replenished on alternate days and no passaging was done. One well from each set was harvested by trypsinization, every 3rd day. Sterility, quantity, viability and immunophenotyping (CD45-/90+/73+) by flow cytometry were checked. We analyzed the data to determine maximum total cell count, viability, CD45-CD90+ and CD45-CD73+ population in α-MEM and compared it with that in DMEM.
Variance of the Galactic nuclei cosmic ray flux
Creators: name: Bernard, G.
name: Delahaye, T.
name: Salati, P.
name: Taillet, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Measurements of cosmic ray fluxes by the PAMELA and CREAM experiments show unexpected spectral features between 200 GeV and 100 TeV. They could be due to the presence of nearby and young cosmic ray sources. This can be studied in the myriad model, in which cosmic rays diffuse from point-like instantaneous sources located randomly throughout the Galaxy. To test this hypothesis, one must compute the flux due to a catalog of local sources, but also the error bars associated to this quantity. This turns out not to be as straightforward as it seems, as the standard deviation is infinite when computed for the most general statistical ensemble. The goals of this paper are to provide a method to associate error bars to the flux measurements which has a clear statistical meaning, and to explore the relation between the myriad model and the more usual source model based on a continuous distribution. To this end, we show that the quantiles of the flux distribution are well-defined, even though the standard deviation is infinite. They can be used to compute 68% confidence levels, for instance. We also use the fact that local sources have known positions and ages to reduce the statistical ensemble from which random sources are drawn in the myriad model. We present a method to evaluate meaningful error bars for the flux obtained in the myriad model. In this context, we also discuss the status of the spectral features observed in the proton flux by CREAM and PAMELA.
description: 17 pages, 12 figures, submitted to A&A
Absence of gapless Majorana edge modes in few-leg bosonic flux ladders
Creators: name: Palm, Felix A.
name: Repellin, Cécile
name: Goldman, Nathan
name: Grusdt, Fabian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The search for Majorana excitations has seen tremendous efforts in recent years, ultimately aiming for their individual controllability in future topological quantum computers. A promising framework to realize such exotic Majorana fermions are topologically ordered non-Abelian phases of matter, such as certain fractional quantum Hall states. Quantum simulators provide unprecedented controllability and versatility to investigate such states, and developing experimentally feasible schemes to realize and identify them is of immediate relevance. Motivated by recent experiments, we consider bosons on coupled chains, subjected to a magnetic flux and experiencing Hubbard repulsion. At magnetic filling factor $ν=1$, similar systems on cylinders have been found to host the non-Abelian Moore-Read Pfaffian state in the bulk. Here, we address the question whether more realistic few-leg ladders can host this exotic state and its chiral Majorana edge states. To this end, we perform extensive DMRG simulations and determine the central charge of the ground state. While we do not find any evidence of gapless Majorana edge modes in systems of up to six legs, exact diagonalization of small systems reveals evidence for the Pfaffian state in the entanglement structure. By systematically varying the number of legs and monitoring the appearance and disappearance of this signal, our work highlights the importance of finite-size effects for the realization of exotic states in experimentally realistic systems.
Dark-field digital holographic microscopy for 3D-tracking of gold nanoparticles
Creators: name: Verpillat, Frédéric
name: Joud, Fadwa
name: Desbiolles, Pierre
name: Gross, Michel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a new technique that combines off-axis Digital Holography and Dark Field Microscopy to track 100nm gold particles diffusing in water. We show that a single hologram is sufficient to localize several particles in a thick sample with a localization accuracy independent of the particle position. From our measurements we reconstruct the trajectories of the particles and derive their 3D diffusion coefficient. Our results pave the way for quantitative studies of the motion of single nanoparticle in complex media.
EOS Modeling and Compositional Simulation Study of Carbon Dioxide Enhanced Oil Recovery in the Pembina Cardium Field, Alberta
Creators: name: Qin, Tianjie
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Engineering--Chemical
subject: Engineering--Petroleum
subject: CO2-EOR
subject: Tight Oil
subject: hydraulic fracturing

description: With thousands of multi-fractured horizontal wells completed in the Pembina Cardium field, adapting and utilizing existing wells and infrastructure for future CO2-EOR development is economically and environmentally attractive. Even so, drilling, completion and hydraulic fracturing design and practices can vary greatly across the field. In this thesis, an effective workflow is developed to evaluate the success of different strategies for completing Cardium horizontal wells and their suitability for conducting CO2 injections for EOR. In addition, a method for identifying re-fracturing horizontal well candidates is developed. WAG injection is a commonly employed technique to improve sweep efficiency in gas flooding processes. A study of different WAG injection schemes is also conducted and compared to continuous CO2 injection in this work, which includes constant WAG, SWAG, and hybrid/tapered WAG injection. The effects of various WAG parameters are investigated. The results indicate that an appropriately designed injection scheme can improve oil recovery substantially.
Recent progress of the ATLAS Planar Pixel Sensor R&D Project
Creators: name: Project, The ATLAS Planar Pixel Sensor R&D
name: :
name: Bomben, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The foreseen luminosity upgrade for the LHC (a factor of 5-10 more in peak luminosity by 2021) poses serious constraints on the technology for the ATLAS tracker in this High Luminosity era (HL-LHC). In fact, such luminosity increase leads to increased occupancy and radiation damage of the tracking detectors. To investigate the suitability of pixel sensors using the proven planar technology for the upgraded tracker, the ATLAS Planar Pixel Sensor R&D Project was established comprising 17 institutes and more than 80 scientists. Main areas of research are the performance of planar pixel sensors at highest fluences, the exploration of possibilities for cost reduction to enable the instrumentation of large areas, the achievement of slim or active edge designs to provide low geometric inefficiencies without the need for shingling of modules and the investigation of the operation of highly irradiated sensors at low thresholds to increase the efficiency. In the following I will present results from the group, concerning mainly irradiated-devices performance, together with studies for new sensors, including detailed simulations.
description: 9 pages,12 figures
Characterizing Vegetation Structure on Anthropogenic Disturbance Features in Alberta’s Boreal Forest with Unmanned Aerial Vehicles
Creators: name: Chen, Shijuan
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Geography
subject: Unmanned Aerial Vehicles
subject: Vegetation
subject: Point Clouds
subject: 3D
subject: Seismic lines

description: Characterizing vegetation structure is an important component for understanding ecological recovery on non-permanent human footprint features in forests. However, current approaches to measuring vegetation structure rely on field protocols that are costly and difficult to scale. Compared to traditional field methods, UAV (unmanned aerial vehicle) photogrammetry has shown great promise in characterizing vegetation structure in a more cost-efficient way. In this research, I used a point-intercept sampling strategy to conduct a comparison of UAV-based estimates and field measurements at two scales: (i) point level and (ii) site (plot) level. I found that at the aggregated site level, UAV photogrammetry alone could replace traditional field-based vegetation surveys of mean vegetation height across the range of conditions assessed in this study, though significant differences remain between remote- and field-based vegetation surveys at point level. Cost analysis indicates that using UAV point clouds alone provides substantial cost-saving over traditional field vegetation surveys.
Accounting of BECCS
Creators: name: Honegger, Matthias
Publisher: name: Zenodo
Year: 2023
Subjects: MRV Methodologies and Accounting Issues

description: Lack of clarity where (which sub-sector) BECCS is reported in GHG inventories Other issues this affects: Accounting Readiness Accounting of DAC Liability in Hubs Accounting of leakage
Challenges of beta-deformation
Creators: name: Morozov, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A brief review of problems, arising in the study of the beta-deformation, also known as "refinement", which appears as a central difficult element in a number of related modern subjects: beta \neq 1 is responsible for deviation from free fermions in 2d conformal theories, from symmetric omega-backgrounds with epsilon_2 = - epsilon_1 in instanton sums in 4d SYM theories, from eigenvalue matrix models to beta-ensembles, from HOMFLY to super-polynomials in Chern-Simons theory, from quantum groups to elliptic and hyperbolic algebras etc. The main attention is paid to the context of AGT relation and its possible generalizations.
description: 20 pages
Checklist for researchers: 6 steps to retain your rights
Creators: name: Ignasi Labastida
name: Iva Melinščak Zlodi
name: Vanessa Proudman
name: Clara Riera
name: Jon Treadway
Publisher: name: Zenodo
Year: 2023
Subjects: Rights retention
Open Access
Researcher
Researchers
Authors
Infographic

description: This checklist is to support researchers. It is part of the RetainYourRights campaign from Project Retain, led by SPARC Europe as part of the Knowledge Rights 21 Programme.

This project was funded by Arcadia – a charitable fund of Lisbet Rausing and Peter Baldwin.
Actions of isovaline and endogenous amino acids on inhibitory receptors in ventrobasal thalamus
Creators: name: Cooke, James Edward
Publisher: name: University of British Columbia
Year: 2010

description: This thesis consists of three manuscripts that examine the effects of amino acids and inhibitory neurotransmission in ventrobasal thalamus, a region of the brain responsible for processing nociceptive information. In the first manuscript we examined the possibility that a proposed antagonist of receptors for endogenous amino acids was selective for β-amino acids. In the second manuscript, we determined the ionic mechanism of action of isovaline, a non-biogenic amino acid with chemical similarity to glycine and GABA. In the third manuscript, we determined that the inhibitory action of isovaline is mediated by metabotropic receptors, likely GABAB. In the first manuscript we used whole-cell patch clamp electrophysiology and immunohistochemistry to examine the differential antagonism of GABAAergic IPSCs by a proposed β-amino acid antagonist, TAG. In IPSCs that were attributable to both GABAergic and glycinergic stimulation, TAG significantly reduced both components. TAG had no effect in purely GABAAergic IPSCs. Our data supports the hypothesis that a specific GABAA subunit, α4, is sensitive to the β-amino acid antagonist, TAG. The second manuscript examines the ionic mechanism of action of isovaline, demonstrated to have analgesic properties in animal models. Isovaline inhibited action potential firing of thalamocortical neurons by activating a long-lasting potassium conductance that was insensitive to the glycine antagonist, strychnine. The sensitivity of isovaline currents to K⁺ channel blockers, their reversal near EK and Nernstian behavior on changing the extracellular [K⁺] confirmed K⁺ current involvement in isovaline inhibition. Since glycine receptors were not apparently involved in isovaline action, we proceeded to determine whether the actions of isovaline were mediated by a metabotropic receptor. In the third manuscript we showed that the long-lasting inhibition of isovaline was eliminated by preventing activation of G-proteins and by antagonism of GABAB receptors. Alteration of GABAB receptor function by CGP7930, an allosteric GABAB modulator, resulted in a potentiation of isovaline’s actions, and the current-voltage relationship of isovaline was similar to that of baclofen, a GABAB agonist. However isovaline also had actions that were different from baclofen. For example, isovaline increased a transient ‘A-type’ potassium current and did not activate some neurons that responded to baclofen.
title: Slim stuwen – fase 3: sturing stuwen en vispassages Dender
Creators: name: Vanderkimpen, Paul
name: Pereira, Fernando
name: Visser, Klaas Pieter
name: Viaene, Peter PV
Publisher: name: Flanders Hydraulics
Year: 2023

description: Title : WL Rapporten. Waterbouwkundig Laboratorium: Antwerpen. Volume : 19_013_1 Issue : Pagination : IX, 141 + 72 p. bijl.