cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The structural limits of civilian leadership intervention into defense policy-making and civilian control of the military in the PRC : from Mao to Jiang
Creators: name: Dinwoodie, Christian
Publisher: name: University of British Columbia
Year: 2009

description: This thesis argues that domestic institutions have been causal in determining degrees of both foreign and defense policy non-integration and the consistency of military action with these policies in the PRC under Jiang Zemin and Mao Zedong at his peak of power. I will first examine alternative explanations of state behaviour illuminating their strengths and weaknesses in solving the puzzle of periods of policy integration and non-integration. Then I will argue that institutions have been causal in selecting out leaders and restricting leaders' choices in both cases. The two cases examined, one of policy integration under Mao Zedong in 1965 and the other of policy non-integration under Jiang Zemin from 1990-1995, each reflect a clearly distinct set of domestic institutions that has been causal in determining policy integration and consistent military action with stated policy goals. Mao was able to integrate policy and military action under conditions of directive leadership in the Politburo, hierarchical authority and pervasive politics. On the other hand Jiang has been faced with balanced leadership in the Politburo, reciprocal accountability among the top leadership, and a loosely coupled system of political military relations. This thesis will conclude with an examination of how the current conditions of non-integrated policy can be changed with the development of new institutional rules and structures. These changes include the development of civilian military expertise, effective monitoring bodies, and policy integrating bodies. Increasing transnational relations, the cross over of the civilian and military scientific comminutes and the growing policy influence of non-military policy experts are mutually reinforcing in giving civilian leaders in China policy handles that can diminish the militaries monopoly of expertise. These developments should help overcome the policy non-integration problems of the current political-military structure under Jiang.
About quantum fluctuations and holographic principle in (4+n)-dimensional spacetime
Creators: name: Midodashvili, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the article we present explicit expressions for quantum fluctuations of spacetime in the case of $(4+n)$-dimensional spacetimes, and consider their holographic properties and some implications for clocks, black holes and computation. We also consider quantum fluctuations and their holographic properties in ADD model and estimate the typical size and mass of the clock to be used in precise measurements of spacetime fluctuations. Numerical estimations of phase incoherence of light from extra-galactic sources in ADD model are also presented.
description: 5 pages
A short review of "DGP Specteroscopy"
Creators: name: Padilla, Antonio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we provide a short review of the main results developed in hep-th/0604086. We focus on linearised vacuum perturbations about the self-accelerating branch of solutions in the DGP model. These are shown to contain a ghost in the spectrum for any value of the brane tension. We also comment on hep-th/0607099, where some counter arguments have been presented.
description: Minor typos corrected
Does Participatory Forest Management Encourage Tree Planting? An Example from Tanzania
Creators: name: Lokina, Razack
name: Lokina, Razack
Publisher: name: Unknown
Year: 2020
Subjects: subject: Resource /Energy Economics and Policy
subject: participatory forest management
subject: tree planting
subject: Tanzania
subject: displace
subject: spatial spillovers
subject: leakage

description: The effectiveness of efforts to protect forests in lower-income countries from excessive degradation, such as through the introduction of participatory forest management, depends in part on how nearby rural populations respond to these efforts. In this paper we focus on tree planting on private land – an important yet understudied response. Combining a conceptual spatial landscape model with primary data, we demonstrate that villagers do plant trees in response to increased forest protection, but only when there are no unprotected forests within their landscape to which they can displace their extraction activities. Our research highlights how tricky it is methodologically to isolate this response in Tanzania, because both tree planting and the siting of forests under increased protection following the introduction of participatory forest management are responses to forest degradation.
Millstone or means to succeed: party-brand value, intra-party competition and personal vote-seeking
Creators: name: Däubler, Thomas
name: Muineacháin, Séin Ó
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Information Systems not elsewhere classified
subject: Science Policy
subject: Mental Health

description: Politicians will cultivate their personal vote if electoral rules foster competition within parties. We examine how the value of the party brand in the competition between parties affects how politicians attempt to build up their personal vote. Theoretically, if party valence is low, intra-party crowdedness intensifies, since a given number of candidates must vie for a smaller number of expected seats. In addition to this first mechanism, a poor party brand should generally (under weak assumptions about candidates’ beliefs) encourage less party-oriented and more person-oriented candidate campaigns. Empirically, we examine this argument in the context of the 2011 Irish legislative election. The incumbent Fianna Fáil struggled with its toxic party brand, as it was widely regarded as being responsible for the crash of the Celtic Tiger, whereas Fine Gael consistently led the polls. A content analysis of our own collection of campaign leaflets suggests that, in 2011, Fianna Fáil candidates ran much more personal campaigns than their Fine Gael counterparts, even when adjusting for the level of intra-party competition. For the campaign four years earlier, candidate survey data do not suggest such a difference. These findings suggest that low party valence contributes to personal vote-seeking.
Political predispositions, not popularity: people’s propensity to interact with political context on Facebook
Creators: name: Pedersen, Rasmus T.
name: Anspach, Nicolas M.
name: Hansen, Kasper M.
name: Arceneaux, Kevin
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Neuroscience
subject: Pharmacology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Science Policy
subject: Mental Health

description: Social media users are not just potential consumers of political content they are also potential producers and distributors. In this paper, we test whether political predispositions or the popularity of posts best explains users’ engagement with political content on Facebook. Using a large-scale survey deployed in Denmark, we utilize a 2 × 2 × 3 survey experiment that manipulates the partisan sponsor of a political message, the number of likes attributed to that message, and the nature of the comments attached to that post. Our findings indicate that individuals are most likely to like, comment, and share political content that aligns with their political predispositions, as the choice to like, share and comment political content on Facebook is largely unaffected by likes and comments from other users. Though we recognize the dangers of obstinacy in democratic discourse, we are somewhat assured by these findings, as it shows that those who engage with political content do not follow a blind herd mentality.
Threat perceptions, blame attribution, and political trust
Creators: name: Schlipphak, Bernd
Publisher: name: Taylor & Francis
Year: 2021
Subjects: Neuroscience
Biotechnology
Cancer
Science Policy
Mental Health

description: Under what conditions do threat perceptions lead to an increasing distrust in government? This article argues that the answer is the degree of ease with which a perceived threat can be linked to governmental actors. First, I argue that threats directed toward society should be more easily linked by citizens to the domestic government compared to perceived threats to the individual (general linkage). Second, a threat linked to a citizen’s general political stance more strongly affects their attitude toward governmental actors in negative ways (heuristic linkage). Third, I expect threat perceptions to further increase governmental distrust if the latter’s actors are blamed for a perceived threat that is salient to citizens’ ideological worldviews (blame attribution). Empirical tests using self-administered survey- and experimental data corroborate the argument. In closing I discuss the implications of the theoretical and empirical setup, emphasizing the need for future studies on blame attribution, heuristic linkages, and political trust.
Measuring the name recognition of politicians through Wikipedia
Creators: name: Haman, Michael
name: Školník, Milan
name: Čopík, Jan
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Information Systems not elsewhere classified
subject: Science Policy

description: We examine how Wikipedia data can be useful for political analysis. Our primary aim is to determine whether Wikipedia page views can be used as a strong proxy for name recognition. Name recognition is an important variable for political science research, but conducting surveys to discover the name recognition of politicians can be cost prohibitive for many researchers. To help researchers overcome this obstacle, we conducted a survey of Czech citizens asking them if they knew each of the 200 members of the Chamber of Deputies of the Czech Republic. Then, we downloaded Wikipedia page information on these deputies. We found that name recognition is strongly correlated with page views on Wikipedia. The more well-known deputies have significantly higher page views on Wikipedia. We recommend that political science researchers requiring an appropriate proxy for name recognition use the free Wikimedia API, which offers page information data.
Outlining Traceability: A Principle for Operationalizing Accountability in Computing Systems
Creators: name: Kroll, Joshua A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Accountability is widely understood as a goal for well governed computer systems, and is a sought-after value in many governance contexts. But how can it be achieved? Recent work on standards for governable artificial intelligence systems offers a related principle: traceability. Traceability requires establishing not only how a system worked but how it was created and for what purpose, in a way that explains why a system has particular dynamics or behaviors. It connects records of how the system was constructed and what the system did mechanically to the broader goals of governance, in a way that highlights human understanding of that mechanical operation and the decision processes underlying it. We examine the various ways in which the principle of traceability has been articulated in AI principles and other policy documents from around the world, distill from these a set of requirements on software systems driven by the principle, and systematize the technologies available to meet those requirements. From our map of requirements to supporting tools, techniques, and procedures, we identify gaps and needs separating what traceability requires from the toolbox available for practitioners. This map reframes existing discussions around accountability and transparency, using the principle of traceability to show how, when, and why transparency can be deployed to serve accountability goals and thereby improve the normative fidelity of systems and their development processes.
description: To be published in the Proceedings of the 2021 ACM Conference on Fairness, Accountability, and Transparency (FAccT'21)
Solving Visibility Problems on MCCs of Smaller Size
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 10399 Numerical and Computational Mathematics not elsewhere classified
subject: FOS: Mathematics

description: The paper presents mesh-connected computer (MCC) algorithms to solve the visibility problem for a set of disjoint simple objects such as line segments, circles, and simple polygons in the plane. Given a set of n such objects, the algorithms compute, on a √n x √n MCC, a view of these objects in O(√n) time. Both parallel and perspective views are considered. Earlier published algorithms for computing the views are sequential and have O(n log n) time complexity. Consider the solutions to solve problems of size n on MCCs with p processors, where p < n. An analysis is presented of the time performance and the limitations imposed by the computational and communication requirements, and the trade-offs between the size of the MCC and the time complexity that can be achieved.
Predicting bloc support in Irish general elections 1951–2020: A political history model
Creators: name: Quinlan, Stephen
name: Lewis-Beck, Michael S.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Information Systems not elsewhere classified

description: Election forecasting is a growing enterprise. Structural models relying on “fundamental” political and economic variables, principally to predict government performance, are popular in political science. Conventional wisdom though is these standard structural models fall short in predicting individual blocs’ performance and their applicability to multiparty systems is restricted. We challenge this by providing a structural forecast of bloc performance in Ireland, a case primarily overlooked in the election forecasting literature. Our model spurns the economic and performance variables conventionally associated with structural forecasting enterprises and instead concentrates on Ireland’s historical party and governance dynamics in the vein of testing whether these patterns alone offer solid predictions of election outcomes. Using Seemingly Unrelated Regression (SUR), our approach, comprising measures of incumbency, short-term party support, and political and economic shocks, offers reasonable predictions of the vote share performance of four blocs: Ireland's two major parties, Fianna Fáil and Fine Gael, Independents, and the Left bloc combined across 20 elections spanning 60 years.
Production of X(3872) at PANDA
Creators: name: Chen, G. Y.
name: Ma, J. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recently discovered $X$(3872) has many possible interpretations. We study the production of $X$(3872) with PANDA at GSI for the antiproton-proton collision with two possible interpretations of X(3872). One is as a loosely-bound molecule of $D$-mesons, while another is a 2P charmonium state $χ_{c1}$ (2P). Using effective couplings we are able to give numerical predictions for the production near the threshold and the production associated with $π^0$. The produced $X$(3872) can be identified with its decay $J/ψπ^+π^-$. We also study the possible background near the threshold production for $X(3872) \to J/ψπ^+π^-$. With the designed luminosity $1.5{\rm fb}^{-1}$ per year of PANDA we find that the event number of $p\bar p \to J/ψπ^+π^-$ near the threshold is at the order of $10^6 \sim 10^8$, where the large uncertainty comes from the total decay width of X(3872). Our study shows that at the threshold more than about 60% events come from the decay of X(3872) and two interpretations are distinguishable from the line-shape of the production. With our results we except that the PANDA experiments will shed light on the property of X(3872).
description: minor changes
Improve Safety of Workers during Highway Construction and Maintenance
Creators: name: Hancher, Donn E.
name: Bussey, Kenneth
name: Meagher, Robin
name: Ross, Jonathan
name: Smith, Kristin
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2007
Subjects: subject: Transportation Engineering

description: There is an inherent risk of injury or fatality in all occupations. Even secretarial occupations face jobsite hazards such as carpal tunnel and back injury. The nature of the construction industry combined with the required physical demand and rigorous work processes, make it an industry with higher risk of injury or fatality. In an effort to decrease that inbuilt jobsite risk that construction workers face, this study will analyze the current best safety practices, examine new safety technologies, and collaborate with construction workers themselves to gain a better perspective of what jobsite hazards they face.  Specifically, this study will focus on highway construction worker safety. Most all statistical data gathered will be from Kentucky construction workers, although the study is not limited by this. Studies of this nature have been completed previously, but most studies neglect to consider maintenance highway workers who encounter many of the same hazards as construction workers, and some would argue that they encounter even more hazards than construction workers.  After analyzing all of the surveys conducted, the statistical analyses performed, and the literature reviewed, the research team has derived recommendations that we suggest that the KYTC and contractors implement in an effort to reduce workplace accidents and fatalities for construction and maintenance workers.
Latency-aware and -predictable Communication with Open Protocol Stacks for Remote Drone Control
Creators: name: Böhmer, Marlene
name: Schmidt, Andreas
name: Pereira, Pablo Gil
name: Herfet, Thorsten
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In order to create cooperating swarms of Unmanned Autonomous Vehicles (UAVs) that also interact with various other systems and devices, open and free communication systems are mandatory. This paper presents an implementation of such a communication system to incorporate the Crazyflie nano-drone as a UAV platform. The protocol stack leverages the open Predictably Reliable Real-time Transport (PRRT) protocol that adds latency-awareness and -predictability to stacks composed of standard Internet protocols. To enable the drone to receive and reply to control commands via Wi-Fi, it has been extended with a Raspberry Pi that runs two variants of the Crazybridge---a software to connect the control board to the network. To evaluate how practical this solution is for the use in control applications, the communication has been analysed with a focus on the latency properties. Our investigations show that despite using the open protocol stack---and hence opting out of specialised implementations---the resulting latencies are in the same order of magnitude (4 to 9 ms) as the latency of the proprietary link.
Coarse-grained description of a passive scalar
Creators: name: Celani, Antonio
name: Afonso, Marco Martins
name: Mazzino, Andrea
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The issue of the parameterization of small-scale dynamics is addressed in the context of passive-scalar turbulence. The basic idea of our strategy is to identify dynamical equations for the coarse-grained scalar dynamics starting from closed equations for two-point statistical indicators. With the aim of performing a fully-analytical study, the Kraichnan advection model is considered. The white-in-time character of the latter model indeed leads to closed equations for the equal-time scalar correlation functions. The classical closure problem however still arises if a standard filtering procedure is applied to those equations in the spirit of the large-eddy-simulation strategy. We show both how to perform exact closures and how to identify the corresponding coarse-grained scalar evolution.
description: 22 pages; submitted to Journal of Turbulence
Compaction of Mixtures of Hard Rocks and Soft Shales and Non-Durable Shales Using Impact Compactors
Creators: name: Hopkins, Tommy C.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2007
Subjects: subject: Transportation Engineering

description: Impact roller compaction has been used to improve embankment and highway subgrades in South Africa, Australia, Europe, and China and other areas of the world. In September of 2003, the International Technology Scanning Program, sponsored by the Federal Highway Administration (FHWA), the American Association of State Highway and Transportation Officials (AASHTO), and the National Cooperative Highway Research Program of the Transportation Research Board, identified this technology as one of several foreign technologies and innovations that could significantly benefit U.S. transportation systems. The technology was high-lighted at the Fifth International Conference on the Bearing Capacity of Roads and Airfields in 1998 (Pinnard). To date, however, usage of these types of non-circular compactors is at an infant stage in the United States. The capability of this type of roller to compact soils and break-down and compact mixtures of hard rocks and clayey shales to a high percentage of maximum dry density obtained from modified compaction (AASHTO T-180) could provide many benefits. The main purposes of this report are to describe potential areas where this class of compactors might be applied in constructing transportation facilities and demonstrate some major potential benefits that could be obtained. Potentially, as shown in this report, this class of compactors could vastly improve the stability of many transportation facilities.
Latest Results from ANTARES
Creators: name: Kouchner, Antoine
Publisher: name: Zenodo
Year: 2021
Subjects: Neutrino Telescopes and MultiMessenger Astrophysics

description: Plenary Contributed Talk at the
 "XIX International Workshop on Neutrino Telescopes"
 on line - 18-26 February, 2021
description: for the ANTARES Collaboration
Kozai-Lidov oscillations triggered by a tilt instability of detached circumplanetary discs
Creators: name: Martin, Rebecca G.
name: Zhu, Zhaohuan
name: Armitage, Philip J.
name: Yang, Chao-Chin
name: Baehr, Hans
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Circumplanetary discs can be linearly unstable to the growth of disc tilt in the tidal potential of the star-planet system. We use three-dimensional hydrodynamical simulations to characterize the disc conditions needed for instability, together with its long term evolution. Tilt growth occurs for disc aspect ratios, evaluated near the disc outer edge, of $H/r\gtrsim 0.05$, with a weak dependence on viscosity in the wave-like regime of warp propagation. Lower mass giant planets are more likely to have circumplanetary discs that satisfy the conditions for instability. We show that the tilt instability can excite the inclination to above the threshold where the circumplanetary disc becomes unstable to Kozai--Lidov (KL) oscillations. Dissipation in the Kozai--Lidov unstable regime caps further tilt growth, but the disc experiences large oscillations in both inclination and eccentricity. Planetary accretion occurs in episodic accretion events. We discuss implications of the joint tilt--KL instability for the detectability of circumplanetary discs, for the obliquity evolution of forming giant planets, and for the formation of satellite systems.
description: Accepted for publication in MNRAS
From "universal" profiles to "universal" scaling laws in X-ray galaxy clusters
Creators: name: Ettori, S.
name: Lovisari, L.
name: Sereno, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: As the end products of the hierarchical process of cosmic structure formation, galaxy clusters present some predictable properties, like those mostly driven by gravity, and some others, more affected by astrophysical dissipative processes, that can be recovered from observations and that show remarkable "universal" behaviour once rescaled by halo mass and redshift. However, a consistent picture that links these universal radial profiles and the integrated values of the thermodynamical quantities of the intracluster medium, also quantifying the deviations from the standard self-similar gravity-driven scenario, has to be demonstrated. In this work, we use a semi-analytic model based on a universal pressure profile in hydrostatic equilibrium within a cold dark matter halo with a defined relation between mass and concentration to reconstruct the scaling laws between the X-ray properties of galaxy clusters. We also quantify any deviation from the self-similar predictions in terms of temperature dependence of a few physical quantities such as the gas mass fraction, the relation between spectroscopic temperature and its global value, and, if present, the hydrostatic mass bias. This model allows to reconstruct both the observed profiles and the scaling laws between integrated quantities. We use the Planck-selected ESZ sample to calibrate the predicted scaling laws between gas mass, temperature, luminosity and total mass. Our universal model reproduces well the observed thermodynamic properties and provides a way to interpret the observed deviations from the standard self-similar behaviour. By combining these results with the constraints on the observed $Y_{SZ}-T$ relation, we show how we can quantify the level of gas clumping affecting the studied sample, estimate the clumping-free gas mass fraction, and suggest the average level of hydrostatic bias present.
description: 13 pages. A&A in press. Minor update to fix typos and better match published version
Twist- and gate-tunable proximity spin-orbit coupling, spin relaxation anisotropy, and charge-to-spin conversion in heterostructures of graphene and transition-metal dichalcogenides
Creators: name: Zollner, Klaus
name: João, Simão M.
name: Nikolić, Branislav K.
name: Fabian, Jaroslav
Publisher: name: Universität Regensburg
Year: 2023
Subjects: subject: spintronics, transition-metal dichalcogenides, heterostructures, proximity spin-orbit coupling
subject: 530 Physik

description: We present a DFT-based investigation of the twist-angle dependent proximity spin-orbit coupling (SOC) in graphene/TMDC structures. We find that for Mo-based TMDCs the proximity valley-Zeeman SOC exhibits a maximum at around 15--20°, and vanishes at 30°, while for W-based TMDCs we find an almost linear decrease of proximity valley-Zeeman SOC when twisting from 0° to 30°. The induced Rashba SOC is rather insensitive to twisting, while acquiring a nonzero Rashba phase angle, φ∈[−20;40]°, for twist angles different from 0° and 30°. This finding contradicts earlier tight-binding predictions that the Rashba angle can be 90° in the studied systems. In addition, we study the influence of several tunability knobs on the proximity SOC for selected twist angles. By applying a transverse electric field in the limits of ±2 V/nm, mainly the Rashba SOC can be tuned by about 50\%. The interlayer distance provides a giant tunability, since the proximity SOC can be increased by a factor of 2--3, when reducing the distance by about 10\%. Encapsulating graphene between two TMDCs, both twist angles are important to control the interference of the individual proximity SOCs, allowing to precisely tailor the valley-Zeeman SOC in graphene, while the Rashba SOC becomes suppressed. Finally, based on our effective Hamiltonians with fitted parameters, we calculate experimentally measurable quantities such as spin lifetime anisotropy and charge-to-spin conversion efficiencies. The spin lifetime anisotropy can become giant, up to 104, in encapsulated structures. The charge-to-spin conversion, which is due to spin-Hall and Rashba-Edelstein effects, can lead to twist-tunable non-equilibrium spin-density polarizations that are perpendicular and parallel to the applied charge current.
Effect of nitrocarburizing and argon admixing on low carbon steel for component facility in radiometallurgical installation
Creators: name: HERMAWAN, Erwan
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Nitrocarburizing
Gas
Low carbon steel

description: Journal of Metals, Materials and Minerals, 31, 4, 26-32
DESIGN AND PERFORMANCE MEASUREMENTS OF A PARALLEL MACHINE FOR THE UNIFICATION ALGORITHM
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: Unification is known to be the most repeated operation in logic programming and PROLOG interpreters. To speed up the execution of logic programs, the performance of unification must be improved. We propose a parallel unification machine for speeding up the unification algorithm. The machine is simulated at the register transfer level and the simulation results as well as performance comparison with a serial unification coprocessor are presented.
Measuring $H_0$ using X-ray and SZ effect observations of dynamically relaxed galaxy clusters
Creators: name: Wan, Jenny T.
name: Mantz, Adam B.
name: Sayers, Jack
name: Allen, Steven W.
name: Morris, R. Glenn
name: Golwala, Sunil R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use a sample of 14 massive, dynamically relaxed galaxy clusters to constrain the Hubble Constant, $H_0$, by combining X-ray and Sunyaev-Zel'dovich (SZ) effect signals measured with Chandra, Planck and Bolocam. This is the first such analysis to marginalize over an empirical, data-driven prior on the overall accuracy of X-ray temperature measurements, while our restriction to the most relaxed, massive clusters also minimizes astrophysical systematics. For a cosmological-constant model with $Ω_m = 0.3$ and $Ω_Λ = 0.7$, we find $H_0 = 67.3^{+21.3}_{-13.3}$ km/s/Mpc, limited by the temperature calibration uncertainty (compared to the statistically limited constraint of $H_0 = 72.3^{+7.6}_{-7.6}$ km/s/Mpc). The intrinsic scatter in the X-ray/SZ pressure ratio is found to be $13 \pm 4$ per cent ($10 \pm 3$ per cent when two clusters with significant galactic dust emission are removed from the sample), consistent with being primarily due to triaxiality and projection. We discuss the prospects for reducing the dominant systematic limitation to this analysis, with improved X-ray calibration and/or precise measurements of the relativistic SZ effect providing a plausible route to per cent level constraints on $H_0$.
description: 16 pages, 9 figures, submitted to MNRAS
Wir trauern um OH Jae-Shik (1933-2013)
Creators: name: Maejima, Munetoshi
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 62 Nr. 2 (2013): Ökumenische Rundschau, Band 62, Heft 2
Sums of squares from elliptic pfaffians
Creators: name: Rosengren, Hjalmar
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary: 11E25, Secondary: 15A15, 33C45, 33E05

description: We give a new proof of Milne's formulas for the number of representations of an integer as a sum of 4m^2 and 4m(m+1) squares. The proof is based on explicit evaluation of pfaffians with elliptic function entries, and relates Milne's formulas to Schur Q-polynomials and to correlation functions for continuous dual Hahn polynomials. We also state a new formula for 2m^2 squares.
description: 30 pages
The Heat Distribution in a Logarithm Potential
Creators: name: Paraguassú, Pedro Ventura
name: Morgado, Welles Antonio Martinez
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: All statistical information about the heat can be obtained with the probability distribution of the heat functional. This paper derives analytically the expression for the distribution of the heat, through path integral, for a diffusive system in a logarithm potential. We apply the found distribution to the first passage problem and find unexpected results for the reversibility of the distribution, giving a fluctuation theorem under specific conditions of the strength parameters.
Nuclear Constraints on the Weak Nucleon-Nucleon Interaction
Creators: name: Haxton, W. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: I discuss the current status of efforts to constrain the strangeness-conserving weak hadronic interaction, which can be isolated in nuclear systems because of the associated parity violation.
description: 7 pages, 5 figures
How does the nature of setting influence clinical teaching? : the perceptions of pediatric and maternity clinical teachers
Creators: name: Davidson, Karen Ann
Publisher: name: University of British Columbia
Year: 2009

description: The nature of setting (context) as an influence of clinical teaching in nursing education has not been explored. As nursing educators in North America move to educate nursing students in a variety of settings, including non-traditional settings, there is a need to explore how context in traditional settings (i.e., hospitals), influence how clinical teachers teach. An ethnographic design was used to explore the perceptions of six clinical teachers who clinically taught in the specialty areas of pediatrics and maternity. The six volunteer participants were selected from community colleges/ universities in British Columbia which offer a Bachelors Degree in Nursing. Pratt's (1992) General Model of Teaching was used as the conceptual framework to guide the research design. The researcher in this study proposed a model of clinical teaching which considers the complexity of teaching in the context of the hospital setting. Analysis of the data revealed components of context (i.e., geography, culture, ideology and history) and relationships with individuals/groups and entities (professional organizations, institutions or hospital agencies) which influenced clinical teaching in a variety of ways. Factors which influenced clinical teachers in general were the history of nursing education, the agency, relationships between staff nurses, clinical teachers and students, the nature of the specialty area (i.e., pediatrics and maternity), and the unit. Cultural groups within the context of clinical teaching that became evident were various members of the health care team, students, and patient and families. Specific factors which influenced pediatrics and maternity differently were the nature of the patient, the influence of family at the bedside, and the unit/units of clinical learning. These findings have implications for nursing education and nursing research. It is hoped that this study will help nursing educators consider the factors and aspects prior to the placement of teachers and students on a particular clinical unit.
Highly Irregular Quantum Constraints
Creators: name: Klauder, John R.
name: Little, J. Scott
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Motivated by a recent paper of Louko and Molgado, we consider a simple system with a single classical constraint R(q)=0. If q_l denotes a generic solution to R(q)=0, our examples include cases where R'(q_l)\ne 0 (regular constraint) and R'(q_l)=0 (irregular constraint) of varying order as well as the case where R(q)=0 for an interval, such as a \leq q \leq b. Quantization of irregular constraints is normally not considered; however, using the projection operator formalism we provide a satisfactory quantization which reduces to the constrained classical system when \hbar \to 0. It is noteworthy that irregular constraints change the observable aspects of a theory as compared to strictly regular constraints.
description: 19 pages, latex
Raman signal enhancement of low-cost metal sheet SERS with gold decoration
Creators: name: Nampueng PANGPAIBOON
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Laser-engraved
Sputtering
Zinc SERS
Copper SERS
Low-cost SERS

description: Journal of Metals, Materials and Minerals, 31, 4, 33-39
Unusual conductance of polyyne-based molecular wires
Creators: name: Crljen, Z.
name: Baranovic, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a full self-consistent ab initio calculation of the current-voltage curve and the conductance of thiolate capped polyynes in contact with gold electrodes. We find the conductance of polyynes an order of magnitude larger compared with other conjugated oligomers. The reason lies in the position of the Fermi level deep in the HOMO related resonance. With the conductance weakly dependent on the applied bias and almost independent of the length of the molecular chain, polyynes appear as nearly perfect molecular wires.
description: 4 pages, 5 figures, 3 tables
The study on un-doped/boron doped/un-doped triple SEG in vertical NAND flash memory
Creators: name: LEE, Woong
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: SEG
Vertical Channel Etch
Boron Concentration
GSL Vth
Boron Doped

description: Journal of Metals, Materials and Minerals, 31, 4, 40-44
Fixed Viewpoint Mirror Surface Reconstruction under an Uncalibrated Camera
Creators: name: Han, Kai
name: Liu, Miaomiao
name: Schnieders, Dirk
name: Wong, Kwan-Yee K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper addresses the problem of mirror surface reconstruction, and proposes a solution based on observing the reflections of a moving reference plane on the mirror surface. Unlike previous approaches which require tedious calibration, our method can recover the camera intrinsics, the poses of the reference plane, as well as the mirror surface from the observed reflections of the reference plane under at least three unknown distinct poses. We first show that the 3D poses of the reference plane can be estimated from the reflection correspondences established between the images and the reference plane. We then form a bunch of 3D lines from the reflection correspondences, and derive an analytical solution to recover the line projection matrix. We transform the line projection matrix to its equivalent camera projection matrix, and propose a cross-ratio based formulation to optimize the camera projection matrix by minimizing reprojection errors. The mirror surface is then reconstructed based on the optimized cross-ratio constraint. Experimental results on both synthetic and real data are presented, which demonstrate the feasibility and accuracy of our method.
description: IEEE Transactions on Image Processing (TIP). Code available at https://github.com/k-han/mirror
Evidence for a disorder driven phase transition in the condensation of 4He in aerogels
Creators: name: Bonnet, Fabien
name: Lambert, Thierry
name: Cross, Benjamin
name: Guyon, Laurent
name: Despetis, Florence
name: Puech, Laurent
name: Wolf, Pierre-Etienne
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report on thermodynamic and optical measurements of the condensation process of $^4$He in three silica aerogels of different microstructures. For the two base-catalysed aerogels, the temperature dependence of the shape of adsorption isotherms and of the morphology of the condensation process show evidence of a disorder driven transition, in agreement with recent theoretical predictions. This transition is not observed for a neutral-catalysed aerogel, which we interpret as due to a larger disorder in this case.
description: 11 pages
Oxidation behavior of Sn-1 wt% Bi alloy in air and deionized water at room temperature
Creators: name: Tanavut NARAVUTHICHAI
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Electrochemical analysis
Oxidation of tin
Thickness of tin oxide film
X-ray photoelectron spectroscopy

description: Journal of Metals, Materials and Minerals, 31, 4, 45-50
Spin-torque Dynamics for Noise Reduction in Vortex-based Sensors
Creators: name: Garcia, Mafalda Jotta
name: Moulin, Julien
name: Wittrock, Steffen
name: Tsunegi, Sumito
name: Yakushiji, Kay
name: Fukushima, Akio
name: Kubota, Hitoshi
name: Yuasa, Shinji
name: Ebels, Ursula
name: Pannetier-Lecoeur, Myriam
name: Fermon, Claude
name: Lebrun, Romain
name: Bortolotti, Paolo
name: Solignac, Aurélie
name: Cros, Vincent
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Performance of magnetoresistive sensors is today mainly limited by their 1/f low-frequency noise. Here, we study this noise component in vortex-based TMR sensors. We compare the noise level in different magnetization configurations of the device, i.e vortex state or uniform parallel or antiparallel states. We find that the vortex state is at least an order of magnitude noisier than the uniform states. Nevertheless, by activating the spin-transfer induced dynamics of the vortex configuration, we observe a reduction of the 1/f noise, close to the values measured in the AP state, as the vortex core has a lower probability of pinning into defect sites. Additionally, by driving the dynamics of the vortex core by a non-resonant rf field or current we demonstrate that the 1/f noise can be further decreased. The ability to reduce the 1/f low-frequency noise in vortex-based devices by leveraging their spin-transfer dynamics thus enhances their applicability in the magnetic sensors' landscape.
Microwave-assisted ecofriendly silver nanoparticle synthesis by varieties of Chrysanthemum morifolium Ramat: Assessing their antioxidant, photocatalytic and antibacterial activities
Creators: name: Mathivathani KANDIAH
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Silver
Nanoparticles
Microwave assisted
Antioxidant activity
Photocatalytic activity

description: Journal of Metals, Materials and Minerals, 31, 4, 51-61
The Quantum and Local Polyakov loop in Chiral Quark Models at Finite Temperature
Creators: name: Megias, E.
name: Arriola, E. Ruiz
name: Salcedo, L. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe results for the confinement-deconfinement phase transition as predicted by the Nambu--Jona-Lasinio model where the local and quantum Polyakov loop is coupled to the constituent quarks in a minimal way (PNJL). We observe that the leading correlation of two Polyakov loops describes the chiral transition accurately. The effects of the current quark mass on the transition are also analysed.
description: 4 pages, 2 figures. Contribution to the Proceedings of the Quark Confinement and the Hadron Spectrum VII Conference (QCHS7) Ponta Delgada (Portugal) Sept 2-7, 2006
Linearly ordered compacta and Banach spaces with a projectional resolution of the identity
Creators: name: Kubis, Wieslaw
Publisher: name: arXiv
Year: 2006
Subjects: subject: Functional Analysis (math.FA)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 46B03, 46B26 (Primary) 54F05, 46E15, 54C35 (Secondary)

description: We construct a compact linearly ordered space $K$ of weight aleph one, such that the space $C(K)$ is not isomorphic to a Banach space with a projectional resolution of the identity, while on the other hand, $K$ is a continuous image of a Valdivia compact and every separable subspace of $C(K)$ is contained in a 1-complemented separable subspace. This answers two questions due to O. Kalenda and V. Montesinos.
description: 13 pages
Adiabatic Elimination in a Lambda System
Creators: name: Brion, E.
name: Pedersen, L. H.
name: Molmer, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper deals with different ways to extract the effective two-dimensional lower level dynamics of a lambda system excited by off-resonant laser beams. We present a commonly used procedure for elimination of the upper level, and we show that it may lead to ambiguous results. To overcome this problem and better understand the applicability conditions of this scheme, we review two rigorous methods which allow us both to derive an unambiguous effective two-level Hamiltonian of the system and to quantify the accuracy of the approximation achieved: the first one relies on the exact solution of the Schrodinger equation, while the second one resorts to the Green's function formalism and the Feshbach projection operator technique.
description: 14 pages, 3 figures
Multiclass Wound Image Classification using an Ensemble Deep CNN-based Classifier
Creators: name: Rostami, Behrouz
name: Anisuzzaman, D. M.
name: Wang, Chuanbo
name: Gopalakrishnan, Sandeep
name: Niezgoda, Jeffrey
name: Yu, Zeyun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Acute and chronic wounds are a challenge to healthcare systems around the world and affect many people's lives annually. Wound classification is a key step in wound diagnosis that would help clinicians to identify an optimal treatment procedure. Hence, having a high-performance classifier assists the specialists in the field to classify the wounds with less financial and time costs. Different machine learning and deep learning-based wound classification methods have been proposed in the literature. In this study, we have developed an ensemble Deep Convolutional Neural Network-based classifier to classify wound images including surgical, diabetic, and venous ulcers, into multi-classes. The output classification scores of two classifiers (patch-wise and image-wise) are fed into a Multi-Layer Perceptron to provide a superior classification performance. A 5-fold cross-validation approach is used to evaluate the proposed method. We obtained maximum and average classification accuracy values of 96.4% and 94.28% for binary and 91.9\% and 87.7\% for 3-class classification problems. The results show that our proposed method can be used effectively as a decision support system in classification of wound images or other related clinical applications.