cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploring Large-scale Structure with Billions of Galaxies
Creators: name: Zhan, Hu
name: Knox, Lloyd
name: Tyson, J. Anthony
name: Margoniner, Vera
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider cosmological applications of galaxy number density correlations to be inferred from future deep and wide multi-band optical surveys. We mostly focus on very large scales as a probe of possible features in the primordial power spectrum. We find the proposed survey of the Large Synoptic Survey Telescope may be competitive with future all-sky CMB experiments over a broad range of scales. On very large scales the inferred power spectrum is robust to photometric redshift errors, and, given a sufficient number density of galaxies, to angular variations in dust extinction and photometric calibration errors. We also consider other applications, such as constraining dark energy with the two CMB-calibrated standard rulers in the matter power spectrum, and controlling the effect of photometric redshift errors to facilitate the interpretation of cosmic shear data. We find that deep photometric surveys over wide area can provide constraints that are competitive with spectroscopic surveys in small volumes.
description: 11 pages, 7 figures, ApJ accepted, references added, expanded discussion in Sec. 3.2
Determination of Young's modulus of active pharmaceutical ingredients by relaxation dynamics at elevated pressures
Creators: name: Phan, Anh D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A new approach is theoretically proposed to study the glass transition of active pharmaceutical ingredients and a glass-forming anisotropic molecular liquid at high pressures. We describe amorphous materials as a fluid of hard spheres. Effects of nearest-neighbor interactions and cooperative motions of particles on glassy dynamics are quantified through a local and collective elastic barrier calculated using the Elastically Collective Nonlinear Langevin Equation theory. Inserting two barriers into Kramer's theory gives structural relaxation time. Then, we formulate a new mapping based on the thermal expansion process under pressure to intercorrelate particle density, temperature, and pressure. This analysis allows us to determine the pressure and temperature dependence of alpha relaxation. From this, we estimate an effective elastic modulus of amorphous materials and capture effects of conformation on the relaxation process. Remarkably, our theoretical results agree well with experiments.
description: 7 pages, 4 figures, accepted for publication in Journal of Physical Chemistry B
Deep learning in computed tomography pulmonary angiography imaging: a dual-pronged approach for pulmonary embolism detection
Creators: name: Bushra, Fabiha
name: Chowdhury, Muhammad E. H.
name: Sarmun, Rusab
name: Kabir, Saidul
name: Said, Menatalla
name: Zoghoul, Sohaib Bassam
name: Mushtak, Adam
name: Al-Hashimi, Israa
name: Alqahtani, Abdulrahman
name: Hasan, Anwarul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The increasing reliance on Computed Tomography Pulmonary Angiography (CTPA) for Pulmonary Embolism (PE) diagnosis presents challenges and a pressing need for improved diagnostic solutions. The primary objective of this study is to leverage deep learning techniques to enhance the Computer Assisted Diagnosis (CAD) of PE. With this aim, we propose a classifier-guided detection approach that effectively leverages the classifier's probabilistic inference to direct the detection predictions, marking a novel contribution in the domain of automated PE diagnosis. Our classification system includes an Attention-Guided Convolutional Neural Network (AG-CNN) that uses local context by employing an attention mechanism. This approach emulates a human expert's attention by looking at both global appearances and local lesion regions before making a decision. The classifier demonstrates robust performance on the FUMPE dataset, achieving an AUROC of 0.927, sensitivity of 0.862, specificity of 0.879, and an F1-score of 0.805 with the Inception-v3 backbone architecture. Moreover, AG-CNN outperforms the baseline DenseNet-121 model, achieving an 8.1% AUROC gain. While previous research has mostly focused on finding PE in the main arteries, our use of cutting-edge object detection models and ensembling techniques greatly improves the accuracy of detecting small embolisms in the peripheral arteries. Finally, our proposed classifier-guided detection approach further refines the detection metrics, contributing new state-of-the-art to the community: mAP$_{50}$, sensitivity, and F1-score of 0.846, 0.901, and 0.779, respectively, outperforming the former benchmark with a significant 3.7% improvement in mAP$_{50}$. Our research aims to elevate PE patient care by integrating AI solutions into clinical workflows, highlighting the potential of human-AI collaboration in medical diagnostics.
description: Published in Expert Systems With Applications
The reduced spectra of quasars HE 0413-4031 and HE 0435-4312 observed with SALT
Creators: name: Czerny, Bozena
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Extragalactic astronomy

description: This ascii data presents the spectra of two quasars: HE 0413-4031 and HE 0435-4312, observed with the lelescope SALT in the years 2012-2023. The columns are: the wavelength in Angstroem, rest frame, the observed spectrum, the best fit, the underlying power law, Fe II contribution, MgII component 1, Mg II component 2. The additional files give the dates of the observation.The results of the analysis were published in the paper: "Wavelength-resolved reverberation mapping of intermediate-redshift quasars HE 0413-4031 and HE 0435-4312: Dissecting Mg II, optical Fe II, and UV Fe II emission regions", Prince et al., 2023, Astronomy & Astrophysics, Volume 678, id.A189, 22 pp.
Renormalized broken-symmetry Schwinger-Dyson equations and the 2PI-1/N expansion for the O(N) model
Creators: name: Cooper, Fred
name: Dawson, John F.
name: Mihaila, Bogdan
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive the renormalized Schwinger-Dyson equations for the one- and two-point functions in the auxiliary field formulation of $λϕ^4$ field theory to order 1/N in the 2PI-1/N expansion. We show that the renormalization of the broken-symmetry theory depends only on the counter terms of the symmetric theory with $ϕ= 0$. We find that the 2PI-1/N expansion violates the Goldstone theorem at order 1/N. In using the O(4) model as a low energy effective field theory of pions to study the time evolution of disoriented chiral condensates one has to {\em{explicitly}} break the O(4) symmetry to give the physical pions a nonzero mass. In this effective theory the {\em additional} small contribution to the pion mass due to the violation of the Goldstone theorem in the 2-PI-1/N equations should be numerically unimportant.
Conflating marginal and conditional treatment effects: Comments on 'Assessing the performance of population adjustment methods for anchored indirect comparisons: A simulation study'
Creators: name: Remiro-Azócar, Antonio
name: Heath, Anna
name: Baio, Gianluca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In this commentary, we highlight the importance of: (1) carefully considering and clarifying whether a marginal or conditional treatment effect is of interest in a population-adjusted indirect treatment comparison; and (2) developing distinct methodologies for estimating the different measures of effect. The appropriateness of each methodology depends on the preferred target of inference.
description: 6 pages, submitted to Statistics in Medicine. Response to `Assessing the performance of population adjustment methods for anchored indirect comparisons: A simulation study' by Phillippo, Dias, Ades and Welton, published in Statistics in Medicine (2020). Updated after Ph.D. proposal defense/transfer viva comments
General criterion for oblivious remote state preparation
Creators: name: Kurucz, Z.
name: Adam, P.
name: Janszky, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A necessary and sufficient condition is given for general exact remote state preparation (RSP) protocols to be oblivious, that is, no information about the target state can be retrieved from the classical message. A novel criterion in terms of commutation relations is also derived for the existence of deterministic exact protocols in which Alice's measurement eigenstates are related to each other by fixed linear operators similar to Bob's unitaries. For non-maximally entangled resources, it provides an easy way to search for RSP protocols. As an example, we show how to reduce the case of partially entangled resources to that of maximally entangled ones, and we construct RSP protocols exploiting the structure of the irreducible representations of Abelian groups.
description: 5 pages, RevTeX
การเข้าถึงทรัพยากรที่ดินในมุมมองความเป็นธรรมทางสังคม
Creators: name: กัญญาภัทร เครือปาน
Publisher: name: กองบริหารการวิจัย
Year: 2562
Subjects: ความเป็นธรรมทางสังคม เศรษฐกิจ การกระจายทรัพยากร สังคมไทย ความเหลื่อมล้ำ

description: วารสารธรรมศาสตร์, 38, 2, 149-164
Semi-quantitative characterisation of coherency-dependent hydrogen diffusion at Σ3 grain boundaries in pure Ni
Creators: name: Kakinuma, Hiroshi
name: Koyama, Motomichi
name: Varanasi, Rama Srinivas
name: Ajito, Saya
name: Akiyama, Eiji
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Computational Biology

description: Hydrogen diffusion behaviour at the coherent and incoherent Σ3 grain boundaries (GBs) of pure polycrystalline Ni was observed in situ using a polyaniline-based hydrogen video imaging system. The hydrogen flux at the coherent Σ3 GBs, also referred to as twin boundaries, was found to be the same as that in the grain interior. In contrast, enhanced hydrogen diffusion was observed at the incoherent portions of the Σ3 GBs. Hydrogen diffusion was notably enhanced at the micro/nanoscale incoherent portion, and the deviation angle of Σ3 GBs was identified as a critical factor influencing the hydrogen flux therein. Hydrogen diffusion was enhanced at the incoherent portions of the Σ3 GBs, and the deviation angle of the Σ3 GBs was identified as a key factor determining the hydrogen flux.
Alignment Approximation for Process Trees
Creators: name: Schuster, Daniel
name: van Zelst, Sebastiaan
name: van der Aalst, Wil M. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Comparing observed behavior (event data generated during process executions) with modeled behavior (process models), is an essential step in process mining analyses. Alignments are the de-facto standard technique for calculating conformance checking statistics. However, the calculation of alignments is computationally complex since a shortest path problem must be solved on a state space which grows non-linearly with the size of the model and the observed behavior, leading to the well-known state space explosion problem. In this paper, we present a novel framework to approximate alignments on process trees by exploiting their hierarchical structure. Process trees are an important process model formalism used by state-of-the-art process mining techniques such as the inductive mining approaches. Our approach exploits structural properties of a given process tree and splits the alignment computation problem into smaller sub-problems. Finally, sub-results are composed to obtain an alignment. Our experiments show that our approach provides a good balance between accuracy and computation time.
"It's not like Jarvis, but it's pretty close!" -- Examining ChatGPT's Usage among Undergraduate Students in Computer Science
Creators: name: Joshi, Ishika
name: Budhiraja, Ritvik
name: Akolekar, Harshal D
name: Challa, Jagat Sesh
name: Kumar, Dhruv
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Large language models (LLMs) such as ChatGPT and Google Bard have garnered significant attention in the academic community. Previous research has evaluated these LLMs for various applications such as generating programming exercises and solutions. However, these evaluations have predominantly been conducted by instructors and researchers, not considering the actual usage of LLMs by students. This study adopts a student-first approach to comprehensively understand how undergraduate computer science students utilize ChatGPT, a popular LLM, released by OpenAI. We employ a combination of student surveys and interviews to obtain valuable insights into the benefits, challenges, and suggested improvements related to ChatGPT. Our findings suggest that a majority of students (over 57%) have a convincingly positive outlook towards adopting ChatGPT as an aid in coursework-related tasks. However, our research also highlights various challenges that must be resolved for long-term acceptance of ChatGPT amongst students. The findings from this investigation have broader implications and may be applicable to other LLMs and their role in computing education.
description: Accepted in ACE 2024: https://aceconference2024.github.io/aceconference2024/ We thank Shamik Sinha, Palak Bhardwaj, Rayyan Hussain, Kashvi Panvanda, Sidhartha Garg, Shagun Yadav, Yash Chillar, and Sourav Goyal for their assistance in the development of questionnaires, as well as their involvement in conducting selected interviews
Première valeur propre du laplacien, volume conforme et chirurgies
Creators: name: Jammes, Pierre
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 58J50, 35P15

description: We define a new differential invariant a compact manifold by $V_{\mathcal M}(M)=\inf_g V_c(M,[g])$, where $V_c(M,[g])$ is the conformal volume of $M$ for the conformal class $[g]$, and prove that it is uniformly bounded above. The main motivation is that this bound provides a upper bound of the Friedlander-Nadirashvili invariant defined by $\inf_g\sup_{\tilde g\in[g]}λ_1(M,\tilde g)\Vol(M,\tilde g)^{\frac 2n}$. The proof relies on the study of the behaviour of $V_{\mathcal M}(M)$ when one performs surgeries on $M$.
description: 11 pages, 5 figures, in French
Dodgy Realm of Conventionality
Creators: name: Dessein, Bart
Publisher: name: The Journal of the European Association for Chinese Studies
Year: 2021

description: Written on the occasion of the launching of the Journal of the European Association for Chinese Studies, this article develops from the fundamental difference the Indian Buddhist philosopher Dignāga (ca.480–ca.540) made between the world of perception and the world of language, and the ramifications this philosophical distinction has for how concepts as ‘China’ and ‘journal’ are understood. Further referring to Dharmakīrti (fl. ca. 6th or 7th century), a hierarchical structure is suggested within the domain of academic publications and the position of the Journal of the European Association for Chinese Studies within this hierarchy is reflected upon. The latter is discussed through the angle of Zhu Xi (1130–1200) daoxue thinking, as well as from the perspective of the contemporary state of the field of academic publishing. 本文撰寫於«歐洲漢學學會雜志» 建刊之際，試從印度佛教哲學家陳那Dignāga (約480 – 約540) 關於感知世界和語言世界之間根本差異以及這種哲學上的差別對於'中國' 和'雜志' 等概念的影響出發，運用法稱Dharmakīrti (約六、七世紀) 在所有概念領域內提出的一種層次結構，來考量«歐洲漢學學會雜志» 作為學術出版物的角色，並結合朱熹(1130–1200) 道學思想的角度以及學術出版領域的現狀進行探討。
description: The Journal of the European Association for Chinese Studies, Vol. 1 (2020): Censorship in China
Generalization of Wigner Time Delay to Sub-Unitary Scattering Systems
Creators: name: Chen, Lei
name: Anlage, Steven M.
name: Fyodorov, Yan V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We introduce a complex generalization of Wigner time delay $τ$ for sub-unitary scattering systems. Theoretical expressions for complex time delay as a function of excitation energy, uniform and non-uniform loss, and coupling, are given. We find very good agreement between theory and experimental data taken on microwave graphs containing an electronically variable lumped-loss element. We find that time delay and the determinant of the scattering matrix share a common feature in that the resonant behavior in $\text{Re}[τ]$ and $\text{Im}[τ]$ serves as a reliable indicator of the condition for Coherent Perfect Absorption (CPA). This work opens a new window on time delay in lossy systems and provides a means to identify the poles and zeros of the scattering matrix from experimental data. The results also enable a new approach to achieving CPA at an arbitrary energy/frequency in complex scattering systems.
description: 8 pages, 2 figures. Supplementary material added
Capacity Theorems for Quantum Multiple Access Channels
Creators: name: Yard, Jon
name: Devetak, Igor
name: Hayden, Patrick
Publisher: name: arXiv
Year: 2005
Subjects: subject: Information Theory (cs.IT)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We consider quantum channels with two senders and one receiver. For an arbitrary such channel, we give multi-letter characterizations of two different two-dimensional capacity regions. The first region characterizes the rates at which it is possible for one sender to send classical information while the other sends quantum information. The second region gives the rates at which each sender can send quantum information. We give an example of a channel for which each region has a single-letter description, concluding with a characterization of the rates at which each user can simultaneously send classical and quantum information.
description: 5 pages. Conference version of quant-ph/0501045, to appear in the proceedings of the IEEE International Symposium on Information Theory, Adelaide, Australia, 2005
Censorship and Self-censorship in Chinese Contexts
Creators: name: Klotzbücher, Sascha
name: Kraushaar, Frank
name: Lycas, Alexis
name: Vampelj Suhadolnik, Nataša
Publisher: name: The Journal of the European Association for Chinese Studies
Year: 2021

description: Editorial on the topic of “Censorship and Self-censorship” and introduction of the journal 介紹歐洲漢學學會期刊及本期專題“審查與自我審查”。
description: The Journal of the European Association for Chinese Studies, Vol. 1 (2020): Censorship in China
Field emission mitigation studies in LCLS-II cavities via in situ plasma processing
Creators: name: Giaccone, Bianca
name: Martinello, Martina
name: Berrutti, Paolo
name: Melnychuk, Oleksandr
name: Sergatskov, Dmitri A.
name: Grassellino, Anna
name: Gonnella, Dan
name: Ross, Marc
name: Doleans, Marc
name: Zasadzinski, John F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Field emission is one of the factors that can limit the performance of superconducting radio frequency cavities. In order to reduce possible field emission in LCLS-II (Linac Coherent Light Source II), we are developing plasma processing for 1.3 GHz 9-cell cavities. Plasma processing can be applied in situ in the cryomodule to mitigate field emission related to hydrocarbon contamination present on the cavity surface. In this paper, plasma cleaning was applied to single cell and 9-cell cavities, both clean and contaminated; the cavities were cold tested before and after plasma processing in order to compare their performance. It was proved that plasma cleaning does not negatively affect the nitrogen doping surface treatment; on the contrary, it preserves the high quality factor and quench field. Plasma processing was also applied to cavities with natural field emission or artificially contaminated. It was found that this technique successfully removes carbon-based contamination from the cavity iris and that it is able to remove field emission in a naturally field emitting cavity. Vacuum failure experiments were simulated on four cavities, and in some cases plasma processing was able to achieve an increase in performance.
description: 10 pages, 10 figures
Shaping the World of Scholars
Creators: name: Bai, Limin
Publisher: name: The Journal of the European Association for Chinese Studies
Year: 2021

description: Modern scholarship has noted that the Kangxi emperor’s patronage of scholars is a form of “soft power” that assisted the Qing ruler during the Kangxi reign to achieve success in conquering the minds and hearts of Han Chinese, especially those eminent scholars who remained loyal to the fallen dynasty. This “soft power” emerged after the Kangxi government had decisively quelled the revolt of the Three Feudatories (San fan三藩) (1673–1681). In 1679 the boxue hongru 博學鴻儒 special examination signalled a significant moment in which the Kangxi emperor adopted a more diplomatic and personal approach to scholars under his rule. This paper examines several examples of scholars’ presenting (jin cheng 進呈）their scholarly works to the emperor/government. By analysing the Kangxi emperor’s tactics for fostering this particular scholarly phenomenon, this study reveals the key elements behind his successful use of soft power in shaping the intellectual milieu of the time. 康熙皇帝在平定三藩之亂（1673–1681）有望之時，開博學鴻儒科（1679）以網羅抗清的明末遺儒為清政權服務。此制科之舉標誌著康熙皇帝新文化政策之始，顯示其欲以懷柔與高壓兼施之手段，從學者鴻儒入手而達到其征服漢人民心之目的。如此懷柔政策，套之於今天的術語，即軟實力。本文圍繞康熙朝之初至鼎盛時期學者們向康熙皇帝進呈他們學術著作的現象， 探討此種軟實力之實質及功效。通過以仇兆鰲（1638–1717)、萬斯同（1638–1702）和李顒 （1627–1705）三個案例為中心的考察，本文展示了康熙懷柔策略的諸方面，揭示其如何收攬漢族名儒學者參與清帝國的諸項社會、文化工程，期望在思想文化這個層面上建立清朝統治的合法性，從而進一步在政治上確認、穩固大清帝國的根基。
description: The Journal of the European Association for Chinese Studies, Vol. 1 (2020): Censorship in China
Strong Mg II and Fe II Absorbers at 2.2 < z < 6.0
Creators: name: Zou, Siwei
name: Jiang, Linhua
name: Shen, Yue
name: Wu, Jin
name: Bañados, Eduardo
name: Fan, Xiaohui
name: Ho, Luis C.
name: Riechers, Dominik A.
name: Venemans, Bram
name: Vestergaard, Marianne
name: Walter, Fabian
name: Wang, Feige
name: Willott, Chris J.
name: Joshi, Ravi
name: Wu, Xue-Bing
name: Yang, Jinyi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of strong intervening absorption systems in the near-IR spectra of 31 luminous quasars at $z>5.7$. The quasar spectra were obtained with {\it Gemini} GNIRS that provide continuous wavelength coverage from $\sim$0.9 to $\sim$2.5 $μ$m. We detect 32 strong Mg II doublet absorbers with rest-frame equivalent width $W_r$ ($\lambda2796$) $>1.0$ Åat $2.2 < z < 6.0$. Each Mg II absorber is confirmed by at least two associated Fe II absorption lines in the rest-frame wavelength range of $\sim 1600-2600$ Å. We find that the comoving line density ($dN/dX$) of the strong Fe II-bearing Mg II absorbers decreases towards higher redshift at $z>3$, consistent with previous studies. Compared with strong Mg II absorbers detected in damped Ly$α$ systems at 2 $
description: 16 pages, 12 figures, 4 tables. Accepted for publication in ApJ
Analysis of the consistency of kaon photoproduction data with Lambda in the final state
Creators: name: Bydzovsky, P.
name: Mart, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The recent CLAS 2005, SAPHIR 2003, LEPS, and the old, pre-1972, data on K^+ Lambda photoproduction are compared with theoretical calculations in the energy region of E_gamma^lab < 2.6 GeV in order to learn about their mutual consistency. The isobaric models Kaon-Maid and Saclay-Lyon, along with new fits to the CLAS data are utilized in this analysis. The SAPHIR 2003 data are shown to be coherently shifted down with respect to the CLAS, LEPS, and pre-1972 data, especially at forward kaon angles. The CLAS, LEPS, and pre-1972 data in the forward hemisphere can be described satisfactorily by using the isobaric model without hadronic form factors. The inclusion of the hadronic form factors yields a strong suppression of the cross sections at small kaon angles and c.m. energies larger than 1.9 GeV, which is not observed in the existing experimental data. We demonstrate that the discrepancy between the CLAS and SAPHIR data has a significant impact on the predicted values of the mass and width of the ``missing-resonance'' D_{13}(1895) in the Kaon-Maid model.
description: 11 pages, 5 figures, 3 tables. Revised version: extended analysis, new fits. Accepted in Phys. Rev. C
HDR Imaging with Quanta Image Sensors: Theoretical Limits and Optimal Reconstruction
Creators: name: Gnanasambandam, Abhiram
name: Chan, Stanley H.
Publisher: name: arXiv
Year: 2020
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: High dynamic range (HDR) imaging is one of the biggest achievements in modern photography. Traditional solutions to HDR imaging are designed for and applied to CMOS image sensors (CIS). However, the mainstream one-micron CIS cameras today generally have a high read noise and low frame-rate. These, in turn, limit the acquisition speed and quality, making the cameras slow in the HDR mode. In this paper, we propose a new computational photography technique for HDR imaging. Recognizing the limitations of CIS, we use the Quanta Image Sensor (QIS) to trade the spatial-temporal resolution with bit-depth. QIS is a single-photon image sensor that has comparable pixel pitch to CIS but substantially lower dark current and read noise. We provide a complete theoretical characterization of the sensor in the context of HDR imaging, by proving the fundamental limits in the dynamic range that QIS can offer and the trade-offs with noise and speed. In addition, we derive an optimal reconstruction algorithm for single-bit and multi-bit QIS. Our algorithm is theoretically optimal for \emph{all} linear reconstruction schemes based on exposure bracketing. Experimental results confirm the validity of the theory and algorithm, based on synthetic and real QIS data.
$W_{1+\infty}$ and $\widetilde W$ algebras, and Ward identities
Creators: name: Drachov, Ya.
name: Mironov, A.
name: Popolitov, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It was demonstrated recently that the $W_{1+\infty}$ algebra contains commutative subalgebras associated with all integer slope rays (including the vertical one). In this paper, we realize that every element of such a ray is associated with a generalized $\widetilde W$ algebra. In particular, the simplest commutative subalgebra associated with the rational Calogero Hamiltonians is associated with the $\widetilde W$ algebras studied earlier. We suggest a definition of the generalized $\widetilde W$ algebra as differential operators in variables $p_k$ basing on the matrix realization of the $W_{1+\infty}$ algebra, and also suggest an unambiguous recursive definition, which, however, involves more elements of the $W_{1+\infty}$ algebra than is contained in its commutative subalgebras. The positive integer rays are associated with $\widetilde W$ algebras that form sets of Ward identities for the WLZZ matrix models, while the vertical ray associated with the trigonometric Calogero-Sutherland model describes the hypergeometric $τ$-functions corresponding to the completed cycles.
description: 11 pages, 1 figure
Effects of an external magnetic field on the gaps and quantum corrections in an ordered Heisenberg antiferromagnet with Dzyaloshinskii-Moriya anisotropy
Creators: name: Chernyshev, A. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the effects of external magnetic field on the properties of an ordered Heisenberg antiferromagnet with the Dzyaloshinskii-Moriya (DM) interaction. Using the spin-wave theory quantum correction to the energy, on-site magnetization, and uniform magnetization are calculated as a function of the field H and the DM anisotropy constant D. It is shown that the spin-wave excitations exhibit an unusual field-evolution of the gaps. This leads to various non-analytic dependencies of the quantum corrections on H and D. It is also demonstrated that, quite generally, the DM interaction suppresses quantum fluctuations, thus driving the system to a more classical ground state. Most of the discussion is devoted to the spin-S, two-dimensional square lattice antiferromagnet, whose S=1/2 case is closely realized in K2V3O8 where at H=0 the DM anisotropy is hidden by the easy-axis anisotropy but is revealed in a finite field. The theoretical results for the field-dependence of the spin-excitation gaps in this material are presented and the implications for other systems are discussed.
description: 15+ pages, 14 Figures
On the use of the local prior on the absolute magnitude of Type Ia supernovae in cosmological inference
Creators: name: Camarena, David
name: Marra, Valerio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A dark-energy which behaves as the cosmological constant until a sudden phantom transition at very-low redshift ($z<0.1$) seems to solve the >4$σ$ disagreement between the local and high-redshift determinations of the Hubble constant, while maintaining the phenomenological success of the $Λ$CDM model with respect to the other observables. Here, we show that such a hockey-stick dark energy cannot solve the $H_0$ crisis. The basic reason is that the supernova absolute magnitude $M_B$ that is used to derive the local $H_0$ constraint is not compatible with the $M_B$ that is necessary to fit supernova, BAO and CMB data, and this disagreement is not solved by a sudden phantom transition at very-low redshift. We make use of this example to show why it is preferable to adopt in the statistical analyses the prior on $M_B$ as an alternative to the prior on $H_0$. The three reasons are: i) one avoids potential double counting of low-redshift supernovae, ii) one avoids assuming the validity of cosmography, in particular fixing the deceleration parameter to the standard model value $q_0=-0.55$, iii) one includes in the analysis the fact that $M_B$ is constrained by local calibration, an information which would otherwise be neglected in the analysis, biasing both model selection and parameter constraints. We provide the priors on $M_B$ relative to the recent Pantheon and DES-SN3YR supernova catalogs. We also provide a Gaussian joint prior on $H_0$ and $q_0$ that generalizes the prior on $H_0$ by SH0ES.
description: 9 pages, 6 figures, 3 tables. Title changed to better describe the scope, expanded analysis and discussion, v3 reflects version accepted for publication in MNRAS; code and up-to-date values of the prior on the absolute magnitude of Type Ia supernovae are available at https://github.com/valerio-marra/CalPriorSNIa
Properties of the energetic particle distributions during the October 28, 2003 solar flare from INTEGRAL/SPI observations
Creators: name: Kiener, J.
name: Gros, M.
name: Tatischeff, V.
name: Weidenspointner, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Analysis of spectra obtained with the gamma-ray spectrometer SPI onboard INTEGRAL of the GOES X17-class flare on October 28, 2003 is presented. In the energy range 600 keV - 8 MeV three prominent narrow lines at 2.223, 4.4 and 6.1 MeV, resulting from nuclear interactions of accelerated ions within the solar atmosphere could be observed. Time profiles of the three lines and the underlying continuum indicate distinct phases with several emission peaks and varying continuum-to-line ratio for several minutes before a smoother decay phase sets in. Due to the high-resolution Ge detectors of SPI and the exceptional intensity of the flare, detailed studies of the 4.4 and 6.1 MeV line shapes was possible for the first time. Comparison with calculated line shapes using a thick target interaction model and several energetic particle angular distributions indicates that the nuclear interactions were induced by downward-directed particle beams with alpha-to-proton ratios of the order of 0.1. There are also indications that the 4.4 MeV to 6.1 MeV line fluence ratio changed between the beginning and the decay phase of the flare, possibly due to a temporal evolution of the energetic particle alpha-to-proton ratio.
description: 24 pages, 10 figures, accepted for publication by A&A
Reading between the Lines of a Classical Chinese Prose Anthology
Creators: name: Kallio, Jyrki
Publisher: name: The Journal of the European Association for Chinese Studies
Year: 2021

description: Guwen guanzhi, first published in 1695, is the most renowned anthology of classical Chinese prose, and is still widely read in schools within Greater China. This article challenges the conventional assumptions that such anthologies in general echoed the imperial orthodoxy, and could not favour heterodox views, and that Guwen guanzhi in particular was just an ordinary anthology based on an imperially approved model, Guwen yuanjian, without any other independent merits than its concise size. The analysis in this article suggests that Guwen guanzhi promoted diversity of thought and autonomous virtue both in terms of its approach to education and its critique towards authoritarianism. While it is impossible to say how intentional this was on the part of the anthology’s compilers, Guwen guanzhi is nevertheless an example of how unorthodox ideas could have been promoted in a subdued manner. 1695年首次發行的《古文觀止》是中國最知名的一部文言散文選集，至今仍在大中華地區學校中被學生廣泛閱讀。長期以來，學界認為該選集代表了對帝國正統觀念的認同，不讚同任何異端觀點。而《古文觀止》本身只是以官方認可的《古文淵鑒》作為模本，除了簡明扼要這一特點之外別無長處的一本普通選集。本文試圖對這些看法提出挑戰。作者認為就提供了教育的途徑及對權威主義的批評而言，《古文觀止》促進了思想的多樣性和獨立自主的品德養成。如今學者已經無法得知選集編纂者的具體用心，儘管如此，《古文觀止》仍然是一個表明非正統觀點曾經是通過柔和的方式推廣的良好範例。
description: The Journal of the European Association for Chinese Studies, Vol. 1 (2020): Censorship in China
Quantum Schwarzschild geometry in effective-field-theory models of gravity
Creators: name: Battista, Emmanuele
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Schwarzschild geometry is investigated within the context of effective-field-theory models of gravity. Starting from its harmonic-coordinate expression, we derive the metric in standard coordinates by keeping the leading one-loop quantum contributions in their most general form. We examine the metric horizons and the nature of the hypersurfaces having constant radius; furthermore, a possible energy-extraction process which violates the null energy condition is described, and both timelike and null geodesics are studied. Our analysis shows that there is no choice of the sign of the constant parameter embodying the quantum correction to the metric which leaves all the features of the classical Schwarzschild solution almost unaffected.
description: 36 pages, 3 figures; accepted for publication in Physical Review D
Instrument Catalogue of Small–Sized Bassoons, ca. 1700–ca. 1915
Creators: name: Agrell, Donna
name: Dominguez, Áurea
name: Graziadio, Giovanni Battista
Publisher: name: Zenodo
Year: 2024
Subjects: Fagottino
Tenoroon
Bassoon
Historical wind instruments
Small-sized bassoons
Organology

description: Instrument catalogue of small-sized bassoons, ca. 1700–1915, including an introduction, and separate alphabetical and reference lists.
Ökumenisch-konziliarer Prozeß - ein Bistum zieht Zwischenbilanz
Creators: name: Schmitt, Siegfried
name: Wirtz, Hans-Gerd
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 40 Nr. 2 (1991): Ökumenische Rundschau, Band 40, Heft 2
Leading interactions in the $β$-$Sr V_6 O_{15}$ compound
Creators: name: Doublet, Marie-Liesse
name: Lepetit, Marie-Bernadette
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The present study shows that the electronic structure of the $β$-$AV\_6O\_{15}$ family of compounds ($A = Sr, Ca, Na ...$) is based on weakly interacting two-leg ladders, in contrast with the zig-zag chain model one could expect from their crystal structure. Spin dimer analysis, based on extended Hückel tight-binding calculations, was performed to determine the structure of the dominant transfer and magnetic interactions in the room temperature $β$-$SrV\_6O\_{15}$ phase. Two different two-legs ladders, associated with different charge/spin orders are proposed to describe these one-dimensional $β$-type systems. The antiferromagnetic ladders are packed in an 'IPN' geometry and coupled to each other through weak antiferromagnetic interactions. This arrangement of the dominant interactions explains the otherwise surprising similarities of the optical conductivity and Raman spectra for the one-dimensional $β$-type phases and the two-dimensional $α$-type ones such as the well-known $α^\prime$-$NaV\_2O\_5$ system.
Coherent phase transfer for real-world twin-field quantum key distribution
Creators: name: Clivati, Cecilia
name: Meda, Alice
name: Donadello, Simone
name: Virzì, Salvatore
name: Genovese, Marco
name: Levi, Filippo
name: Mura, Alberto
name: Pittaluga, Mirko
name: Yuan, Zhiliang L.
name: Shields, Andrew J.
name: Lucamarini, Marco
name: Degiovanni, Ivo Pietro
name: Calonico, Davide
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum mechanics allows the distribution of intrinsically secure encryption keys by optical means. Twin-field quantum key distribution is the most promising technique for its implementation on long-distance fibers, but requires stabilizing the optical length of the communication channels between parties. In proof-of-principle experiments based on spooled fibers, this was achieved by interleaving the quantum communication with periodical adjustment frames. In this approach, longer duty cycles for the key streaming come at the cost of a looser control of channel length, and a successful key-transfer using this technique in a real world remains a significant challenge. Using interferometry techniques derived from frequency metrology, we developed a solution for the simultaneous key streaming and channel length control, and demonstrate it on a 206 km field-deployed fiber with 65 dB loss. Our technique reduces the quantum-bit-error-rate contributed by channel length variations to <1%, representing an effective solution for real-world quantum communications.
On the Bessel solution of Kepler's equation
Creators: name: Borghi, Riccardo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 44A60, 33C10, 30B50

description: Since its introduction in 1650, Kepler's equation has never ceased to fascinate mathematicians, scientists, and engineers. Over the course of five centuries, a large number of different solution strategies have been devised and implemented. Among them, the one originally proposed by J. L. Lagrange and later by F. W. Bessel still continues to be a source of mathematical treasures. Here, the Bessel solution of the elliptic Kepler equation is explored from a new perspective offered by the theory of the Stieltjes series. In particular, it has been proven that a complex Kapteyn series obtained directly by the Bessel expansion is a Stieltjes series. This mathematical result, to the best of our knowledge, is a new integral representation of the KE solution. Some considerations on possible extensions of our results to more general classes of the Kapteyn series are also presented.
description: arXiv admin note: substantial text overlap with arXiv:2112.15154
Classification of zero-energy resonances by dissociation of Feshbach molecules
Creators: name: Hanna, Thomas M.
name: Goral, Krzysztof
name: Witkowska, Emilia
name: Koehler, Thorsten
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the dissociation of Feshbach molecules by a magnetic field sweep across a zero-energy resonance. In the limit of an instantaneous magnetic field change, the distribution of atomic kinetic energy can have a peak indicating dominance of the molecular closed-channel spin configuration over the entrance channel. The extent of this dominance influences physical properties such as stability with respect to collisions, and so the readily measurable presence or absence of the corresponding peak provides a practical method of classifying zero-energy resonances. Currently achievable ramp speeds, e.g. those demonstrated by Duerr et al. [Phys. Rev. A 70, 031601 (2005)], are fast enough to provide magnetic field changes that may be interpreted as instantaneous. We study the transition from sudden magnetic field changes to asymptotically wide, linear ramps. In the latter limit, the predicted form of the atomic kinetic energy distribution is independent of the specific implementation of the two-body physics, provided that the near-resonant scattering properties are properly accounted for.
description: 10 pages, 5 eps figures
Art, criticism, and the self : at play in the works of Oscar Wilde
Creators: name: Punchard, Tracy Kathleen
Publisher: name: University of British Columbia
Year: 2009

description: This thesis explores the works of Oscar Wilde as they articulate and model an aesthetic of play. I show that Wilde distinguishes between true and false forms--or what I call models and anti-models--of play in a number of areas: art, criticism, and society, language, thought, and culture, self and other. My introduction establishes a context for the cultural value of play in the nineteenth century. I survey the ideas of Friedrich Schiller, who treats play in the aesthetic realm; Matthew Arnold, who discusses Criticism as a free play of the mind; Herbert Spencer, who explores play in the context of evolution; and Johan Huizinga, who analyses play in its social context. In my three chapters on Wilde's critical essays, I draw upon their ideas to describe Wilde's philosophy of play and examine how the form of Wilde's critical essays illuminates his aesthetic. My first chapter explores models and anti-models of play in Art, as they are described by Vivian in "The Decay of Lying." By exploring the role of "lying" in its aesthetic rather ethical context, Vivian demonstrates the value of the play-spirit for the development of culture. My second chapter discusses models and anti-models of play in Criticism as they are described by Gilbert in "The Critic as Artist." By refashioning the traditions of nineteenth-century criticism, Gilbert presents his own model of criticism as an aesthetic activity and demonstrates the role of the play-spirit in the development of the individual and the race. My third chapter relates models and anti-models of play in art, criticism, and social life to the modes of self-realization described by Wilde in "The Soul of Man Under Socialism." I take up Wilde's well-known paradox, that Socialism is a means of realizing Individualism, by showing how Wilde plays with these terms in an aesthetic rather than a political context. In the remaining chapters I read Wilde's fictional and dramatic texts in light of his aesthetics and treat the characters as models and anti-models of the play-spirit. In The Picture of Dorian Gray, I take the measure of play, not morality, as a guide for interpretation. In this reading Lord Henry Wotton is the novel's critic as artist, while Dorian Gray, with his literal-mindedness, his imitative instinct, and his ruthless narcissism, fails to achieve the aesthetic disinterestedness that characterizes true play. My sixth chapter traces themes related to play—game, ceremony, and performance—in Wilde's Society Comedies to demonstrate how these plays both reflect and critique the spectacle of Society and the conventions of nineteenth-century melodrama. My thesis concludes with The Importance of Being Earnest as it presents a culmination of Wilde's play-spirit and his playful linguistic strategies. I show how both the form and content of Earnest model the paradoxical ideal of play itself—that through play we may realize the experience of being at one with ourselves and on good terms with the world.
Uyghur Concubine and a French Juggler Resisting Japanese Imperialism
Creators: name: Blahota, Martin
Publisher: name: The Journal of the European Association for Chinese Studies
Year: 2021

description: Contrary to general knowledge, there was a vibrant literary world in Manchukuo. One of the most accomplished writers in this Japanese puppet state was Jue Qing (1917–62). After the Japanese surrender, he was labeled “a traitor to the Chinese nation” and, until recently, his fiction works were erased from the history of Chinese literature. However, some of his works seem to express anti-colonial sentiments. This paper analyses two stories from 1943, namely “Xiang Fei”(The Fragrant Concubine) and “Yiren Yang Kun”(The Acrobat Yang Kun). It focuses on their intertextual references to the Chinese legend of Xiang Fei and a story about a juggler by Anatole France (1844 –1924), respectively. This study suggests that Jue Qing uses Aesopian language in these stories to bypass official censorship. More specifically, it explores how he uses intertextual references and other rhetorical devices to camouflage praise for resistance against the Japanese coloniser and, at the same time, to draw the reader’s attention to it. 與常識相反，滿洲國的文學世界曾經非常活躍。在這個日本傀儡政權裡，爵青（1917–1962）是最有成就的作家之一。日本投降後，他被貼上“漢奸”的標籤，而到了最近，他的小說作品也從中國文學史上被抹去了。但是，他的一些作品似乎表達了反殖民的態度。本文分析了兩篇1943年出版的小說，《香妃》與《藝人楊崑》。本文的重點在於它們對中國香妃傳說以及阿納托爾·法朗士（1844–1924）的《聖母的江湖藝人》的互文引用。本研究試圖指出，爵青使用伊索式語言來繞過殖民地文化審查制度。具體而言，本文探討了他如何使用互文參考和其他修辭手法以掩飾起其作品的反日本殖民主義批判，而同時引起讀者的注意。
description: The Journal of the European Association for Chinese Studies, Vol. 1 (2020): Censorship in China
Effects of Quantum Hall Edge Reconstruction on Momenum-Resolved Tunneling
Creators: name: Melikidze, Akakii
name: Yang, Kun
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: During the reconstruction of the edge of a quantum Hall liquid, Coulomb interaction energy is lowered through the change in the structure of the edge. We use theory developed earlier by one of the authors [K. Yang, Phys. Rev. Lett. 91, 036802 (2003)] to calculate the electron spectral functions of a reconstructed edge, and study the consequences of the edge reconstruction for the momentum-resolved tunneling into the edge. It is found that additional excitation modes that appear after the reconstruction produce distinct features in the energy and momentum dependence of the spectral function, which can be used to detect the presence of edge reconstruction.