cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Line of sight depth of the Large and Small Magellanic Clouds
Creators: name: Subramaniam, Annapurni
name: Subramanian, Smitha
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We used the red clump stars from the Optical Gravitational Lensing Experiment (OGLE II) survey and the the Magellanic Cloud Photometric Survey (MCPS), to estimate the line of sight depth. The observed dispersion in the magnitude and colour distribution of red clump stars is used to estimate the line of sight depth, after correcting for the contribution due to other effects. This dispersion due to depth, has a range from minimum dispersion that can be estimated, to 0.46 mag (a depth of 500 pc to 10.44 Kpc), in the LMC. In the case of SMC, the dispersion ranges from minimum dispersion to 0.35 magnitude (a depth of 665 pc to 9.53 Kpc). The thickness profile of LMC bar indicates that it is flared. The average depth in the bar region is 4.0$\pm$1.4 kpc. The halo of the LMC (using RR Lyrea stars) is found to have larger depth compared to the disk/bar, which supports the presence of inner halo for the LMC. The large depth estimated for the LMC bar and the disk suggests that the LMC might have had minor mergers. In the case of SMC, the bar depth (4.90$\pm$1.23 Kpc) and the disk depth (4.23$\pm$1.48 Kpc) are found to be within the standard deviations. We find evidence for increase in depth near the optical center (up to 9 kpc). On the other hand, the estimated depth for the halo (RR Lyrea stars) and disk (RC stars) for the bar region of the SMC is found to be similar. Thus, increased depth and enhanced stellar as well as HI density near the optical center suggests that the SMC may have a bulge.
description: 6 pages, 3 figures: To appear in the proceedings of the IAU symposium 256, The Magellanic System: Stars, Gas and Galaxies
Some Complexity Results for Stateful Network Verification
Creators: name: Alpernas, Kalev
name: Panda, Aurojit
name: Rabinovich, Alexander
name: Sagiv, Mooly
name: Shenker, Scott
name: Shoham, Sharon
name: Velner, Yaron
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: In modern networks, forwarding of packets often depends on the history of previously transmitted traffic. Such networks contain stateful middleboxes, whose forwarding behaviour depends on a mutable internal state. Firewalls and load balancers are typical examples of stateful middleboxes. This work addresses the complexity of verifying safety properties, such as isolation, in networks with finite-state middleboxes. Unfortunately, we show that even in the absence of forwarding loops, reasoning about such networks is undecidable due to interactions between middleboxes connected by unbounded ordered channels. We therefore abstract away channel ordering. This abstraction is sound for safety, and makes the problem decidable. Specifically, safety checking becomes EXPSPACE-complete in the number of hosts and middleboxes in the network. To tackle the high complexity, we identify two useful subclasses of finite-state middleboxes which admit better complexities. The simplest class includes, e.g., firewalls and permits polynomial-time verification. The second class includes, e.g., cache servers and learning switches, and makes the safety problem coNP-complete. Finally, we implement a tool for verifying the correctness of stateful networks.
description: This is a pre-print of an article published in Formal Methods in System Design. The final authenticated version is available online at: https://doi.org/10.1007/s10703-018-00330-9
A Local-Global Criterion for Dynamics on P^1
Creators: name: Silverman, Joseph H.
name: Voloch, José Felipe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 11B37, 11G99, 14G99, 37F10

description: Let K be a number field or a function field, let F:P^1 --> P^1 be a rational map of degree at least two defined over K, let P be a point in P^1(K) having infinite F-orbit, and let Z be a finite subset of Z. We prove a local-global criterion for the intersection of the F-orbit of P and the finite set Z. This is a special case of a dynamical Brauer-Manin criterion suggested by Hsia and Silverman.
description: 10 pages
Filament Eruption Driving EUV Loop Contraction then Expansion above a Stable Filament
Creators: name: Chandra, Ramesh
name: Demoulin, Pascal
name: Devi, Pooja
name: Joshi, Reetika
name: Schmieder, Brigitte
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyze the observations of EUV loop evolution associated with the filament eruption located at the border of an active region. The event SOL2013-03-16T14:00 was observed with a large difference of view point by the Solar Dynamics Observatory and Solar Terrestrial Relations Observatory --A spacecraft. The filament height is fitted with the sum of a linear and exponential function. These two phases point to different physical mechanisms such as: tether-cutting reconnection and a magnetic instability. While no X-ray emission is reported, this event presents the classical eruption features like: separation of double ribbons and the growth of flare loops. We report the migration of the southern foot of the erupting filament flux rope due to the interchange reconnection with encountered magnetic loops of a neighbouring AR. Parallel to the erupting filament, a stable filament remains in the core of active region. The specificity of this eruption is that coronal loops, located above the nearly joining ends of the two filaments, first contract in phase, then expand and reach a new stable configuration close to the one present at the eruption onset. Both contraction and expansion phases last around 20 min. The main difference with previous cases is that the PIL bent about 180 deg around the end of the erupting filament because the magnetic configuration is at least tri-polar. These observations are challenging for models which interpreted previous cases of loop contraction within a bipolar configuration. New simulations are required to broaden the complexity of the configurations studied.
description: 32 pages, 9 figures, Accepted for publication in The Astrophysical Journal
Search for Near-Infrared Pulsation of the Anomalous X-ray Pulsar 4U 0142+61
Creators: name: Morii, Mikio
name: Kobayashi, Naoto
name: Kawai, Nobuyuki
name: Terada, Hiroshi
name: Tanaka, Yasuyuki T.
name: Kitamoto, Shunji
name: Shibazaki, Noriaki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have searched for pulsation of the anomalous X-ray pulsar (AXP) 4U 0142+61 in the K' band ($λ_{\rm eff} = 2.11$ $μ$m) using the fast-readout mode of IRCS at the Subaru 8.2-m telescope. We found no significant signal at the pulse frequency expected by the precise ephemeris obtained by the X-ray monitoring observation with RXTE. Nonetheless, we obtained a best upper limit of 17% (90% C.L.) for the root-mean-square pulse fraction in the K' band. Combined with i' band pulsation (Dhillon et al. 2005), the slope of the pulsed component ($F_ν\propto ν^α$) was constrained to $α> -0.87$ (90% C.L.) for an interstellar extinction of $A_{V} = 3.5$.
description: 11 pages, 3 figures, Accepted for publication in PASJ
Power BI Certification Training Course Online.docx
Creators: name: Pareek, Sneha
Publisher: name: figshare
Year: 2021
Subjects: subject: 100504 Data Communications
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The Microsoft Power BI Training by IgmGuru is planned to assist users in dynamic learning about Power BI, Microsoft’s latest business intelligence tool used for Analytics and data visualization. The primary goal of Online Power BI Course is to help users attain a working knowledge of exploring and analyzing datasets using Power BI and make easy to use visualizations into the dashboard using the tools provided by Power BI platform. The Power BI Online Training provides a basic understanding of Data types, creation and exploration of Data, adding slicers, optimizing data, map visualization, designing funnel, waterfall charts, scatter plots, developing quick insights, and many more technical details about Power BI. IgmGuru’s Power BI Online Course helps users to culminate an outstanding knowledge of Analytics and data visualization using Microsoft’s Power BI training Online and develop a technical aptitude to design interactive visualizations based on organizational requirements. Microsoft Power B
A chain dictionary method for Word Sense Disambiguation and applications
Creators: name: Tatar, Doina
name: Serban, Gabriela
name: Mihis, Andreea
name: Lupea, Mihaiela
name: Lupsa, Dana
name: Frentiu, Militon
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: I.2.7

description: A large class of unsupervised algorithms for Word Sense Disambiguation (WSD) is that of dictionary-based methods. Various algorithms have as the root Lesk's algorithm, which exploits the sense definitions in the dictionary directly. Our approach uses the lexical base WordNet for a new algorithm originated in Lesk's, namely "chain algorithm for disambiguation of all words", CHAD. We show how translation from a language into another one and also text entailment verification could be accomplished by this disambiguation.
description: 8 pages, 5 figures
A Review on Methods and Applications in Multimodal Deep Learning
Creators: name: Summaira, Jabeen
name: Li, Xi
name: Shoib, Amin Muhammad
name: Abdul, Jabbar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Deep Learning has implemented a wide range of applications and has become increasingly popular in recent years. The goal of multimodal deep learning (MMDL) is to create models that can process and link information using various modalities. Despite the extensive development made for unimodal learning, it still cannot cover all the aspects of human learning. Multimodal learning helps to understand and analyze better when various senses are engaged in the processing of information. This paper focuses on multiple types of modalities, i.e., image, video, text, audio, body gestures, facial expressions, and physiological signals. Detailed analysis of the baseline approaches and an in-depth study of recent advancements during the last five years (2017 to 2021) in multimodal deep learning applications has been provided. A fine-grained taxonomy of various multimodal deep learning methods is proposed, elaborating on different applications in more depth. Lastly, main issues are highlighted separately for each domain, along with their possible future research directions.
description: 29 pages. arXiv admin note: substantial text overlap with arXiv:2105.11087
Focus Group Discussion Script 1: Cooperation, Coordination and Communication for Health and Safety
Creators: name: Ndekugri E. Issaka
name: Ankrah A. Nii
name: Adaku, Ebenezer
Publisher: name: Zenodo
Year: 2021
Subjects: Construction; Occupational Safety and Health; Risk Management; Health and Safety Coordination; Cooperation; Coordination; Communication

description: Occupational safety and health (OSH) still remains a challenge to the construction industry world-wide and source of worry for industry stakeholders. The Construction (Design and Management) Regulations (CDM) have been the primary tool to drive changes in the management of health and safety in the UK construction industry. Five (5) years after its latest Regulations (CDM 2015), there is a need for introspection, stock-taking and honest discussion on current practice and how to manage more collaboratively OSH risks on construction projects. This focus group discussion script aimed to capture industry feedback on experiences and views regarding the implementation of CDM 2015 at the pre-construction stage of construction projects with a focus on the cooperation, coordination and communication for health and safety among all duty holders on projects.
Focus Group Discussion Script 2: Cooperation, Coordination and Communication for Health and Safety
Creators: name: Ndekugri E. Issaka
name: Ankrah A. Nii
name: Adaku, Ebenezer
Publisher: name: Zenodo
Year: 2021
Subjects: Construction; Occupational Safety and Health; Risk Management; Health and Safety Coordination; Cooperation; Coordination; Communication

description: Occupational safety and health (OSH) still remains a challenge to the construction industry world-wide and source of worry for industry stakeholders. The Construction (Design and Management) Regulations (CDM) have been the primary tool to drive changes in the management of health and safety in the UK construction industry. Five (5) years after its latest Regulations (CDM 2015), there is a need for introspection, stock-taking and honest discussion on current practice and how to manage more collaboratively OSH risks on construction projects. This focus group discussion script aimed to capture industry feedback on experiences and views regarding the implementation of CDM 2015 at the pre-construction stage of construction projects with a focus on the cooperation, coordination and communication for health and safety among all duty holders on projects.
Optical deep ultra-violet characterization of ferroelectric twisted 2D hexagonal boron nitride
Creators: name: Henzinger, Christina
Publisher: name: Stanford Digital Repository
Year: 2024
Subjects: subject: Two-dimensional materials, hexagonal boron nitride, ferroelectricity, optics

description: Two-dimensional hexagonal Boron Nitride (2D hBN) is a uniquely rich 2D material due to its interesting opto-electronic properties. hBN’s large bandgap makes it an insulator, but also lends it interesting optical deep ultra-violet (DUV) properties that remain largely unexplored. A better understanding of these optical properties could provide us information about the modified band structure of mono- and few-layer hBN, as well as twisted, stacked hBN. In particular, hBN with a small twist angle close to 0 exhibits ferroelectricity. In this report, I explore the optical properties of twisted and ferroelectric hBN stacks on SiO2/Si substrates. Four main contributions were made: (1) The mechanical exfoliation of large, thin hBN flakes was significantly improved by using a micromanipulator during the transfer of hBN to the substrate. (2) A transfer matrix method model was programmed to rapidly estimate the thickness of few-layer hBN flakes based solely on their reflectance spectra, and was adapted to fit twisted hBN stacks with non-linear least squares optimization. (3) The amplitude of the interference patterns in reflectance spectra of annealed hBN stacks was shown to decrease with increased angle. (4) The different stacking sequence of ferroelectric and non-ferroelectric hBN stacks exhibit different optical signatures and excitonic features, but further research is required to better understand the relationship between ferroelectric stacking order, individual ferroelectric domains, excitons, and optical measurements.
Code diversity in multiple antenna wireless communication
Creators: name: Wu, Yiyue
name: Calderbank, Robert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The standard approach to the design of individual space-time codes is based on optimizing diversity and coding gains. This geometric approach leads to remarkable examples, such as perfect space-time block codes, for which the complexity of Maximum Likelihood (ML) decoding is considerable. Code diversity is an alternative and complementary approach where a small number of feedback bits are used to select from a family of space-time codes. Different codes lead to different induced channels at the receiver, where Channel State Information (CSI) is used to instruct the transmitter how to choose the code. This method of feedback provides gains associated with beamforming while minimizing the number of feedback bits. It complements the standard approach to code design by taking advantage of different (possibly equivalent) realizations of a particular code design. Feedback can be combined with sub-optimal low complexity decoding of the component codes to match ML decoding performance of any individual code in the family. It can also be combined with ML decoding of the component codes to improve performance beyond ML decoding performance of any individual code. One method of implementing code diversity is the use of feedback to adapt the phase of a transmitted signal as shown for 4 by 4 Quasi-Orthogonal Space-Time Block Code (QOSTBC) and multi-user detection using the Alamouti code. Code diversity implemented by selecting from equivalent variants is used to improve ML decoding performance of the Golden code. This paper introduces a family of full rate circulant codes which can be linearly decoded by fourier decomposition of circulant matrices within the code diversity framework. A 3 by 3 circulant code is shown to outperform the Alamouti code at the same transmission rate.
description: 9 pages
Focus Group Discussion Script: Working Collaboratively on Site for Health and Safety
Creators: name: Ndekugri E. Issaka
name: Ankrah A. Nii
name: Adaku, Ebenezer
Publisher: name: Zenodo
Year: 2021
Subjects: Construction; Occupational Safety and Health; Risk Management; Health and Safety Coordination; Principal Contractor; Contractor

description: Occupational safety and health (OSH) still remains a challenge to the construction industry world-wide and source of worry for industry stakeholders. The Construction (Design and Management) Regulations (CDM) have been the primary tool to drive changes in the management of health and safety in the UK construction industry. Five (5) years after its latest Regulations (CDM 2015), there is a need for introspection, stock-taking and honest discussion on current practice and how to manage more collaboratively OSH risks on construction projects. This focus group discussion script aimed to capture industry feedback on experiences and views regarding the implementation of CDM 2015 at the pre-construction stage of construction projects with a focus on the collaborative working roles of the CDM Principal Contractor and Contractor on site.
Precise Measurements of CH Maser Emission and Its Abundance in Translucent Clouds
Creators: name: Tang, Ningyu
name: Li, Di
name: Luo, Gan
name: Heiles, Carl
name: Qin, Sheng-Li
name: Wang, Junzhi
name: Xia, Jifeng
name: Chen, Longfei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present high-sensitivity CH 9 cm ON/OFF observations toward 18 extra-galactic continuum sources that have been detected with OH 18 cm absorption in the Millennium survey with the Arecibo telescope. CH emission was detected toward six of eighteen sources. The excitation temperature of CH has been derived directly through analyzing all detected ON and OFF velocity components. The excitation temperature of CH 3335 MHz transition ranges from $-54.5$ to $-0.4$ K and roughly follows a log-normal distribution peaking within [$-$5, 0] K, which implies overestimation by 20% to more than ten times during calculating CH column density by assuming the conventional value of $-60$ or $-10$ K. Furthermore, the column density of CH would be underestimated by a factor of $1.32\pm 0.03$ when adopting local thermal equilibrium (LTE) assumption instead of using the CH three hyperfine transitions. We found a correlation between the column density of CH and OH following log$N$(CH) = (1.80$\pm$ 0.49) log$N$(OH) $-11.59 \pm 6.87$. The linear correlation between the column density of CH and H$_2$ is consistent with that derived from visible wavelengths studies, confirming that CH is one of the best tracers of H$_2$ component in diffuse molecular gas.
description: 15 pages, 9 figures, accepted by ApJS
A unified framework for utility maximization problems: An Orlicz space approach
Creators: name: Biagini, Sara
name: Frittelli, Marco
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G48, 60G44, 49N15, 91B28 (Primary) 46E30, 46N30, 91B16 (Secondary)

description: We consider a stochastic financial incomplete market where the price processes are described by a vector-valued semimartingale that is possibly nonlocally bounded. We face the classical problem of utility maximization from terminal wealth, with utility functions that are finite-valued over $(a,\infty)$, $a\in\lbrack-\infty,\infty)$, and satisfy weak regularity assumptions. We adopt a class of trading strategies that allows for stochastic integrals that are not necessarily bounded from below. The embedding of the utility maximization problem in Orlicz spaces permits us to formulate the problem in a unified way for both the cases $a\in\mathbb{R}$ and $a=-\infty$. By duality methods, we prove the existence of solutions to the primal and dual problems and show that a singular component in the pricing functionals may also occur with utility functions finite on the entire real line.
description: Published in at http://dx.doi.org/10.1214/07-AAP469 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Avoided crossings between bound states of ultracold Cesium dimers
Creators: name: Hutson, Jeremy M.
name: Tiesinga, Eite
name: Julienne, Paul S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present an efficient new computational method for calculating the binding energies of the bound states of ultracold alkali-metal dimers in the presence of magnetic fields. The method is based on propagation of coupled differential equations and does not use a basis set for the interatomic distance coordinate. It is much more efficient than the previous method based on a radial basis set and allows many more spin channels to be included. This is particularly important in the vicinity of avoided crossings between bound states. We characterize a number of different avoided crossings in Cs_2 and compare our converged calculations with experimental results. Small but significant discrepancies are observed in both crossing strengths and level positions, especially for levels with l symmetry (rotational angular momentum L=8). The discrepancies should allow the development of improved potential models in the future.
description: 11 pages, 9 figures
Sequence-Dependent Self-Assembly of Supramolecular Nanofibers in Periodic Dynamic Block Copolymers
Creators: name: Phong, Jason
Publisher: name: Stanford Digital Repository
Year: 2025
Subjects: subject: Block copolymers
subject: Supramolecular chemistry
subject: Self-assembly (Chemistry)
subject: Polymer electrolytes

description: The ability for block copolymers (BCPs) to spontaneously self-assemble into a wide range of nanostructured morphologies has received considerable attention for their technological applications. To expand the range of nanostructures accessible to block copolymers, we design dynamic block copolymers (DBCPs) that combine the phase separation of traditional block copolymers with the supramolecular self-assembly of periodic dynamic polymers to achieve the spontaneous formation of supramolecular nanofibers with well-ordered phase domains. These DBCPs are multiblock copolymers, meaning they consist of multiple oligomers of each block type covalently connected by dynamic hydrogen bonding units. We prepared DBCPs in which the oligomer blocks are either connected in a statistically random sequence or in a periodically alternating sequence. In this work, we investigate how the block sequence affects the supramolecular nanofiber self-assembly, bulk mechanical properties, thermal phase behavior, and ionic conductivity of the DBCPs. We demonstrate that the DBCPs with a periodic block sequence self-assemble into supramolecular nanofibers with well-ordered PEG and PDMS domains, in contrast to those with a random sequence which do not form nanofibers but have disordered morphologies. The periodicity of the block sequence ensures the regularly spaced placement of the dynamic bonds along the polymer chain, which enables the facile stacking of the hydrogen bonding units into ordered 1D supramolecular nanofibers, which delays the onset of terminal flow by up to ~60 °C compared to the random block sequence. The hierarchically assembled supramolecular nanofibers display complex phase behaviors as a result of both block copolymer phase segregation and supramolecular interactions. Despite identical chemical composition, the periodic DBCPs demonstrate bulk ionic conductivity values almost an order of magnitude higher than their random counterparts due to the formation of nanofibers with well-ordered, interconnected, ion-transporting PEG domains.
Intermediate states at structural phase transition: Model with a one-component order parameter coupled to strains
Creators: name: Minami, Akihiko
name: Onuki, Akira
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study a Ginzburg-Landau model of structural phase transition in two dimensions, in which a single order parameter is coupled to the tetragonal and dilational strains. Such elastic coupling terms in the free energy much affect the phase transition behavior particularly near the tricriticality. A characteristic feature is appearance of intermediate states, where the ordered and disordered regions coexist on mesoscopic scales in nearly steady states in a temperature window. The window width increases with increasing the strength of the dilational coupling. It arises from freezing of phase ordering in inhomogeneous strains. No impurity mechanism is involved. We present a simple theory of the intermediate states to produce phase diagrams consistent with simulation results.
description: 16 pages, 14 figures
Multiple Membranes from Gauged Supergravity
Creators: name: Bergshoeff, Eric A.
name: de Roo, Mees
name: Hohm, Olaf
name: Roest, Diederik
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Starting from gauged N=8 supergravity in three dimensions we construct actions for multiple membranes by taking the limit to global supersymmetry for different choices of the embedding tensor. This provides a general framework that reproduces many recent results on multiple membrane actions as well as generalisations thereof. As examples we discuss conformal (non-conformal) gaugings leading to multiple M2-branes (D2-branes) and massive deformations of these systems.
description: 22 pages, v2: minor changes, reference added, v3: version to appear in JHEP
Second Quantized Kolmogorov Complexity
Creators: name: Rogers, Caroline
name: Vedral, Vlatko
name: Nagarajan, Rajagopal
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Kolmogorov complexity of a string is the length of its shortest description. We define a second quantised Kolmogorov complexity where the length of a description is defined to be the average length of its superposition. We discuss this complexity's basic properties. We define the corresponding prefix complexity and show that the inequalities obeyed by this prefix complexity are also obeyed by von Neumann entropy.
description: 14 pages, 0 figures
Axionic Mirage Mediation
Creators: name: Nakamura, Shuntaro
name: Okumura, Ken-ichi
name: Yamaguchi, Masahiro
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this talk, we propose a model of mirage mediation, in which Peccei-Quinn symmetry is incorporated. In this \textit{axionic mirage mediation}, it is shown that the Peccei-Quinn symmetry breaking scale is dynamically determined around $10^{10}$ GeV to $10^{12}$ GeV due to the supersymmetry breaking effects. The problems in the original mirage mediation such as the $μ$-problem and the moduli problem can be solved simultaneouly. Furthermore, in our model the axino, which is the superpartner of the axion, is the lightest sparticle.
description: 3 pages, 4 figures, talk given at SUSY08, Seoul, Korea
Focus Group Discussion Script: The Contractor's duties and Project OSH
Creators: name: Ndekugri E. Issaka
name: Ankrah A. Nii
name: Adaku, Ebenezer
Publisher: name: Zenodo
Year: 2021
Subjects: Construction; Occupational Safety and Health; Risk Management; Health and Safety Coordination; Contractor

description: Occupational safety and health (OSH) still remains a challenge to the construction industry world-wide and source of worry for industry stakeholders. The Construction (Design and Management) Regulations (CDM) have been the primary tool to drive changes in the management of health and safety in the UK construction industry. Five (5) years after its latest Regulations (CDM 2015), there is a need for introspection, stock-taking and honest discussion on current practice and how to manage more collaboratively OSH risks on construction projects. This focus group discussion script aimed to capture industry feedback on experiences and views regarding the implementation of CDM 2015 at the pre-construction stage of construction projects with a focus on the role of the CDM Contractor
Matrix Reduction and the su(2|2) superalgebra in AdS/CFT
Creators: name: Aniceto, Inês
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the supersymmetry generators Q, S on the 1-loop vectorless sector of N=4 Super Yang-Mills, by reduction to the plane-wave matrix model. Using a coherent basis in the su(2|2) sector, a comparison with the algebra given by Beisert in nlin/0610017 is presented, and some parameters (up to one-loop) are determined. We make a final comparison of these supercharges with the results that can be obtained from the string action by working in the light-cone-gauge and discretizing the string.
description: 20 pages, no figures v2: Typos corrected, references added
Focus Group Discussion Script: The Principal Contractor's duties and Project OSH
Creators: name: Ndekugri E. Issaka
name: Ankrah A. Nii
name: Adaku, Ebenezer
Publisher: name: Zenodo
Year: 2021
Subjects: Construction; Occupational Safety and Health; Risk Management; Health and Safety Coordination; Principal Contractor

description: Occupational safety and health (OSH) still remains a challenge to the construction industry world-wide and source of worry for industry stakeholders. The Construction (Design and Management) Regulations (CDM) have been the primary tool to drive changes in the management of health and safety in the UK construction industry. Five (5) years after its latest Regulations (CDM 2015), there is a need for introspection, stock-taking and honest discussion on current practice and how to manage more collaboratively OSH risks on construction projects. This focus group discussion script aimed to capture industry feedback on experiences and views regarding the implementation of CDM 2015 at the pre-construction stage of construction projects with a focus on the role of the CDM Principal Contractor.
Connected subgroups of SO(2,n) acting irreducibly on $\R^{2,n}$
Creators: name: Di Scala, Antonio J.
name: Leistner, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E46, 53C35, 53C40, 53C29, 53A30

description: We classify all connected subgroups of SO(2,n) that act irreducibly on $\R^{2,n}$. Apart from $SO_0(2,n)$ itself these are $U(1,n/2)$, $SU(1,n/2)$, if $n$ even, $S^1\cdot SO(1,n/2)$ if $n$ even and $n\ge 2$, and $SO_0(1,2)$ for $n=3$. Our proof is based on the Karpelevich Theorem and uses the classification of totally geodesic submanifolds of complex hyperbolic space and of the Lie ball. As an application we obtain a list of possible irreducible holonomy groups of Lorentzian conformal structures, namely $SO_0(2,n)$, SU(1,n), and $SO_0(1,2)$.
description: 22 pages, no figures
Finite number of Kaluza-Klein modes, all with zero masses
Creators: name: Erdem, Recai
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Kaluza-Klein modes of fermions in a 5-dimensional toy model are considered. The number of Kaluza-Klein modes that survive after integration over extra dimensions is finite in this space. Moreover the extra dimensional piece of the kinetic term induces no mass for the higher Kaluza-Klein modes on contrary to the standard lore.
description: Presentation is improved and typos are corrected, two appendices and some references are added. No change in the essential content of the paper. 11 pages
title: Maturation and Structure Formation Processes in Binders with Aqueous Alkali-Silicate Solutions
Creators: name: Schuch, Kai
name: Kaps, Christian
Publisher: name: Bauhaus-Universität Weimar
Year: 2017
Subjects: subject: Waterglass
subject: Silicate
subject: Aluminosilicate
subject: Geopolymer
subject: 500

description: Maturation and structure formation processes can lead to crack formation in silicate and aluminosilicate binders (e.g. for coating materials...) through restricted deformation, loss of strength and thus to loss of durability. These processes are evaluated with silicate materials with an outlook on aluminosilicate binders.
Focus Group Discussion Script: CDM Support Services
Creators: name: Ndekugri E. Issaka
name: Ankrah A. Nii
name: Adaku, Ebenezer
Publisher: name: Zenodo
Year: 2021
Subjects: Construction; Occupational Safety and Health; Risk Management; Health and Safety Coordination; CDM Support Services

description: Occupational safety and health (OSH) still remains a challenge to the construction industry world-wide and source of worry for industry stakeholders. The Construction (Design and Management) Regulations (CDM) have been the primary tool to drive changes in the management of health and safety in the UK construction industry. Five (5) years after its latest Regulations (CDM 2015), there is a need for introspection, stock-taking and honest discussion on current practice and how to manage more collaboratively OSH risks on construction projects. This focus group discussion script aimed to capture industry feedback on experiences and views regarding the implementation of CDM 2015 at the pre-construction stage of construction projects with a focus on the role of the CDM support services.
Refractories in vacuum induction melting
Creators: name: Da Costa E Silva, Andre Luiz V.
Publisher: name: University of British Columbia
Year: 2010

description: The literature in Vacuum Induction Melting is briefly reviewed, with especial emphasis on refractory practices and refractory-metal interactions. Since it was determined that in both steel and superalloy vacuum melting in large furnaces lining failures are associated with attack on the cement joints, tests were performed to characterize this attack and determine the most suitable cements from this standpoint. The presence of low-stability oxides (SiO₂, P₂O₅,...) was shown to be the main reason for the cement's low resistance to metal attack. It is suggested that in the case of steels, diffusion of the less stable oxides may be the rate controlling step in the corrosion process. In the case of superalloys, the high interaction between oxygen and the elements present in the alloy (Ti, Al, Cr) causes an extreme depression of the oxygen activity in the melt, hence enhancing the dissolution of all refractory oxides. In order to produce cements with a very small content of the low-stability oxides, the use of fluorides as fluxes was attempted. The cements so produced performed well, as far as resistance to attack, adherence to bricks and technological properties were concerned. To verify the validity (on a large scale) of the mechanisms observed and proposed in the tests, samples from industrial Vacuum Furnaces were examined. It was concluded that the processes occurring in a large furnace can be rationalized based on the test observations. Also comments were made on the need for improved pouring facilities, if the products of the metal-refractory interaction are to be kept out of the final material produced. This is because in the present state of the refractory technology and practice, these interactions cannot be avoided.
Edge Effect on Electronic Transport Properties of Graphene Nanoribbons and Presence of Perfectly Conducting Channel
Creators: name: Wakabayashi, Katsunori
name: Takane, Yositake
name: Yamamoto, Masayuki
name: Sigrist, Manfred
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Numerical calculations have been performed to elucidate unconventional electronic transport properties in disordered nanographene ribbons with zigzag edges (zigzag ribbons). The energy band structure of zigzag ribbons has two valleys that are well separated in momentum space, related to the two Dirac points of the graphene spectrum. The partial flat bands due to edge states make the imbalance between left- and right-going modes in each valley, {\it i.e.} appearance of a single chiral mode. This feature gives rise to a perfectly conducting channel in the disordered system, i.e. the average of conductance $$ converges exponentially to 1 conductance quantum per spin with increasing system length, provided impurity scattering does not connect the two valleys, as is the case for long-range impurity potentials. Ribbons with short-range impurity potentials, however, through inter-valley scattering, display ordinary localization behavior. Symmetry considerations lead to the classification of disordered zigzag ribbons into the unitary class for long-range impurities, and the orthogonal class for short-range impurities. The electronic states of graphene nanoribbons with general edge structures are also discussed, and it is demonstrated that chiral channels due to the edge states are realized even in more general edge structures except for armchair edges.
description: accepted for publication in CARBON(Elsevier)
A Simple Framework for 3D Lensless Imaging with Programmable Masks
Creators: name: Zheng, Yucheng
name: Hua, Yi
name: Sankaranarayanan, Aswin C.
name: Asif, M. Salman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Lensless cameras provide a framework to build thin imaging systems by replacing the lens in a conventional camera with an amplitude or phase mask near the sensor. Existing methods for lensless imaging can recover the depth and intensity of the scene, but they require solving computationally-expensive inverse problems. Furthermore, existing methods struggle to recover dense scenes with large depth variations. In this paper, we propose a lensless imaging system that captures a small number of measurements using different patterns on a programmable mask. In this context, we make three contributions. First, we present a fast recovery algorithm to recover textures on a fixed number of depth planes in the scene. Second, we consider the mask design problem, for programmable lensless cameras, and provide a design template for optimizing the mask patterns with the goal of improving depth estimation. Third, we use a refinement network as a post-processing step to identify and remove artifacts in the reconstruction. These modifications are evaluated extensively with experimental results on a lensless camera prototype to showcase the performance benefits of the optimized masks and recovery algorithms over the state of the art.
description: Supplementary material available at https://github.com/CSIPlab/Programmable3Dcam.git
A method to study ageing of polydomain ferroelectrics using measurements of nonlinear permittivity
Creators: name: Mokry, Pavel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: It is known that the permittivity of the ferroelectric films is affected by several phenomena, which deteriorate the material quality (e.g. the redistribution of the crystal lattice defects, appearance of the electrode-adjacent non-ferroelectric layers or the spontaneous polarization screening due to a free charge injection across the electrode-adjacent layer, etc.). It is also known that the permittivity of ferroelectric polydomain films is controlled by the sum of two contributions: the crystal lattice (intrinsic) contribution and the domain wall movement (extrinsic) contribution. It is the latter one, which is very sensitive to the aforementioned phenomena and which plays a key role in the deterioration of the dielectric response of the ferroelectric polydomain films. In this Article, there is presented a method for the identification of the process, which is responsible for the ferroelectric ageing. The method is based on the analysis of the evolution of both the linear and nonlinear permittivity during ageing. Applicability of the method is theoretically demonstrated on four ageing scenarios in two qualitatively different systems where the evolution of the nonlinear permittivity is controlled, first, by a redistribution of the pinning centers on the domain wall and, second, by microstructural changes at the interface between the ferroelectric layer and the electrode. It is shown that each ageing scenario is characterized by unique trend in the evolution between the linear and nonlinear part of the permittivity, which can be verified experimentally.
description: Submitted to Ferroelectrics
Coupling of orthogonal diffusion modes in two-dimensional nonhomogeneous systems
Creators: name: Krzyzewski, F
name: Zaluska-Kotur, Magdalena A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Collective diffusion coefficient in a two-dimensional lattice gas on a nonhomogeneous substrate is investigated using variational approach. Particles reside at adsorption sites with different well depths potentials and jump randomly between them. The site blocking is the only particle--particle interaction mechanism. It is shown that the value of the diffusion coefficient in one lattice direction depends nontrivially on the rate and the character of the particle jumps in all directions. When the jump rate in the direction perpendicular to that along which the diffusion is observed increases, the collective diffusion coefficient approaches values predicted within the mean field approximation. Results of the Monte Carlo simulations for selected systems are very well reproduced by our analytical results.
description: 7 pages, 5 figures
Focus Group Discussion Script: Design integration under CDM
Creators: name: Ndekugri E. Issaka
name: Ankrah A. Nii
name: Adaku, Ebenezer
Publisher: name: Zenodo
Year: 2021
Subjects: Construction; Occupational Safety and Health; Risk Management; Health and Safety Coordination; Design Integration

description: Occupational safety and health (OSH) still remains a challenge to the construction industry world-wide and source of worry for industry stakeholders. The Construction (Design and Management) Regulations (CDM) have been the primary tool to drive changes in the management of health and safety in the UK construction industry. Five (5) years after its latest Regulations (CDM 2015), there is a need for introspection, stock-taking and honest discussion on current practice and how to manage more collaboratively OSH risks on construction projects. This focus group discussion script aimed to capture industry feedback on experiences and views regarding the implementation of CDM 2015 at the pre-construction stage of construction projects with a focus on the design integration roles of the CDM Principal Designer and Designer.
Accounting for Spatial Heterogeneity of Preferences in Discrete Choice Models
Creators: name: WIKTOR BUDZIŃSKI, MIKOŁAJ CZAJKOWSKI
Publisher: name: Oddział PAN w Łodzi
Year: 2021

description: The Central European Journal of Economic Modelling and Econometrics (CEJEME) is a quarterly international journal. It aims to publish articles focusing on mathematical or statistical models in economic sciences. Papers covering the application of existing econometric techniques to a wide variety of problems in economics, in particular in macroeconomics and finance are welcome. Advanced empirical studies devoted to modelling and forecasting of Central and Eastern European economies are of particular interest. Any rigorous methods of statistical inference can be used and articles representing Bayesian econometrics are decidedly within the range of the Journal's interests.
Largest Empty Circle Centered on a Query Line
Creators: name: Augustine, John
name: Putnam, Brian
name: Roy, Sasanka
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: The Largest Empty Circle problem seeks the largest circle centered within the convex hull of a set $P$ of $n$ points in $\mathbb{R}^2$ and devoid of points from $P$. In this paper, we introduce a query version of this well-studied problem. In our query version, we are required to preprocess $P$ so that when given a query line $Q$, we can quickly compute the largest empty circle centered at some point on $Q$ and within the convex hull of $P$. We present solutions for two special cases and the general case; all our queries run in $O(\log n)$ time. We restrict the query line to be horizontal in the first special case, which we preprocess in $O(n α(n) \log n)$ time and space, where $α(n)$ is the slow growing inverse of the Ackermann's function. When the query line is restricted to pass through a fixed point, the second special case, our preprocessing takes $O(n α(n)^{O(α(n))} \log n)$ time and space. We use insights from the two special cases to solve the general version of the problem with preprocessing time and space in $O(n^3 \log n)$ and $O(n^3)$ respectively.
description: 18 pages, 13 figures
Wage Effects of Overeducation: Evidence from Poland
Creators: name: PAULINA BRONIATOWSKA
Publisher: name: Oddział PAN w Łodzi
Year: 2021
Subjects: educational mismatch, overeducation, tertiary education, wage premium

description: The Central European Journal of Economic Modelling and Econometrics (CEJEME) is a quarterly international journal. It aims to publish articles focusing on mathematical or statistical models in economic sciences. Papers covering the application of existing econometric techniques to a wide variety of problems in economics, in particular in macroeconomics and finance are welcome. Advanced empirical studies devoted to modelling and forecasting of Central and Eastern European economies are of particular interest. Any rigorous methods of statistical inference can be used and articles representing Bayesian econometrics are decidedly within the range of the Journal's interests.