cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evidence for dust clearing through resolved submillimeter imaging
Creators: name: Brown, J. M.
name: Blake, G. A.
name: Qi, C.
name: Dullemond, C. P.
name: Wilner, D. J.
name: Williams, J. P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Mid-infrared spectrophotometric observations have revealed a small sub-class of circumstellar disks with spectral energy distributions (SEDs) suggestive of large inner gaps with low dust content. However, such data provide only an indirect and model-dependent method of finding central holes. Imaging of protoplanetry disks provides an independent check of SED modeling. We present here the direct characterization of three 33-47 AU radii inner gaps, in the disks around LkHa 330, SR 21N and HD 135344B, via 340 GHz (880 micron) dust continuum aperture synthesis observations obtained with the Submillimeter Array (SMA). The large gaps are fully resolved at ~0\farcs3 by the SMA observations and mostly empty of dust, with less than 1 - 7.5 x 10^-6 Msolar of fine grained solids inside the holes. Gas (as traced by atomic accretion markers and CO 4.7 micron rovibrational emission) is still present in the inner regions of all three disks. For each, the inner hole exhibits a relatively steep rise in dust emission to the outer disk, a feature more likely to originate from the gravitational influence of a companion body than from a process expected to show a more shallow gradient like grain growth. Importantly, the good agreement of the spatially resolved data and spectrophotometry-based models lends confidence to current interpretations of SEDs, wherein the significant dust emission deficits arise from disks with inner gaps or holes. Further SED-based searches can therefore be expected to yield numerous additional candidates that can be examined at high spatial resolution.
description: 19 pages, 4 figures, published in ApJ
Active Visuo-Tactile Interactive Robotic Perception for Accurate Object Pose Estimation in Dense Clutter
Creators: name: Murali, Prajval Kumar
name: Dutta, Anirvan
name: Gentner, Michael
name: Burdet, Etienne
name: Dahiya, Ravinder
name: Kaboli, Mohsen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This work presents a novel active visuo-tactile based framework for robotic systems to accurately estimate pose of objects in dense cluttered environments. The scene representation is derived using a novel declutter graph (DG) which describes the relationship among objects in the scene for decluttering by leveraging semantic segmentation and grasp affordances networks. The graph formulation allows robots to efficiently declutter the workspace by autonomously selecting the next best object to remove and the optimal action (prehensile or non-prehensile) to perform. Furthermore, we propose a novel translation-invariant Quaternion filter (TIQF) for active vision and active tactile based pose estimation. Both active visual and active tactile points are selected by maximizing the expected information gain. We evaluate our proposed framework on a system with two robots coordinating on randomized scenes of dense cluttered objects and perform ablation studies with static vision and active vision based estimation prior and post decluttering as baselines. Our proposed active visuo-tactile interactive perception framework shows upto 36% improvement in pose accuracy compared to the active vision baseline.
description: Accepted for publication at IEEE Robotics and Automation Letters and IEEE International Conference on Robotics and Automation (ICRA) 2022
title: ÐÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¸Ð¹ ÐºÑÑÑ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ Ð¸Ð½Ð¾ÑÐ·ÑÑÐ½Ð¾Ð¹ Ð¿ÑÐ¾ÑÐµÑÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ð¹ ÐºÐ¾Ð¼Ð¼ÑÐ½Ð¸ÐºÐ°ÑÐ¸Ð¸ Ð² ÐÐ£ÐÐµ. Ð ÐµÐºÐ»Ð°Ð¼Ð° Ð¸ ÑÐ²ÑÐ·Ð¸ Ñ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÑÑ
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: ÐÑÐ¸Ð¿Ð¾Ð²Ð°, ÐÐºÐ°ÑÐµÑÐ¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: Ð°Ð½Ð³Ð»Ð¸Ð¹ÑÐºÐ¸Ð¹ ÑÐ·ÑÐº
ÑÐµÐºÐ»Ð°Ð¼Ð°
ÑÐ²ÑÐ·Ð¸ Ñ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÑÑ
ÑÑÐµÐ±Ð½Ð¸ÐºÐ¸ Ð¸ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ñ Ð´Ð»Ñ Ð²ÑÐ·Ð¾Ð²

description: Ð£ÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ ÑÐ¾ÑÑÐ¾Ð¸Ñ Ð¸Ð· Ð¿ÑÑÐ¸ ÑÐ°Ð·Ð´ÐµÐ»Ð¾Ð², Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð½ÑÑ ÐºÐ»ÑÑÐµÐ²ÑÐ¼ Ð°ÑÐ¿ÐµÐºÑÐ°Ð¼ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ¾Ð² Ð¿Ð¾ ÑÐ²ÑÐ·ÑÐ¼ Ñ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÑÑ: Ð¸ÑÑÐ¾ÑÐ¸Ñ PR, ÑÑÐ¿ÐµÑÐ½Ð°Ñ ÑÐµÐºÐ»Ð°Ð¼Ð°, Ð±ÑÐµÐ½Ð´Ð¸Ð½Ð³, ÑÐ¸Ð»Ð° ÑÐ±ÐµÐ¶Ð´ÐµÐ½Ð¸Ñ, ÑÐ¸ÑÑÐ¾Ð²Ð°Ñ Ð´Ð¸Ð¿Ð»Ð¾Ð¼Ð°ÑÐ¸Ñ. ÐÐ¾ÑÐ¾Ð±Ð¸Ðµ Ð²ÐºÐ»ÑÑÐ°ÐµÑ Ð°ÑÑÐµÐ½ÑÐ¸ÑÐ½ÑÐµ ÑÐµÐºÑÑÑ Ð½Ð° Ð°Ð½Ð³Ð»Ð¸Ð¹ÑÐºÐ¾Ð¼ ÑÐ·ÑÐºÐµ Ð¸ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑ Ð°Ð²ÑÐ¾ÑÑÐºÐ¸Ñ ÑÐ¿ÑÐ°Ð¶Ð½ÐµÐ½Ð¸Ð¹, Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð½ÑÑ Ð½Ð° Ð¿Ð¾Ð½Ð¸Ð¼Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾ÑÐ¸ÑÐ°Ð½Ð½Ð¾Ð³Ð¾, Ð¿ÑÐ¾ÑÐ»ÑÑÐ°Ð½Ð½Ð¾Ð³Ð¾ Ð¸ Ð¿ÑÐ¾ÑÐ¼Ð¾ÑÑÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð°, ÑÑÐ²Ð¾ÐµÐ½Ð¸Ðµ Ð½Ð¾Ð²ÑÑ Ð»ÐµÐºÑÐ¸ÑÐµÑÐºÐ¸Ñ ÐµÐ´Ð¸Ð½Ð¸Ñ Ð¸ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ðµ Ð´Ð¸ÑÐºÑÑÑÐ¸Ð¾Ð½Ð½ÑÑ Ð½Ð°Ð²ÑÐºÐ¾Ð² Ð² ÑÐ°Ð¼ÐºÐ°Ñ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼ Ð¸Ð·ÑÑÐ°ÐµÐ¼Ð¾Ð¹ Ð´Ð¸ÑÑÐ¸Ð¿Ð»Ð¸Ð½Ñ, Ð° ÑÐ°ÐºÐ¶Ðµ ÑÐ¾Ð´ÐµÑÐ¶Ð¸Ñ CLILmodule, Ð½Ð°ÑÐµÐ»ÐµÐ½Ð½ÑÐ¹ Ð½Ð° Ð¸Ð½ÑÐµÐ³ÑÐ°ÑÐ¸Ð²Ð½Ð¾Ðµ Ð¾Ð±ÑÑÐµÐ½Ð¸Ðµ Ð¸Ð½Ð¾ÑÑÑÐ°Ð½Ð½Ð¾Ð¼Ñ ÑÐ·ÑÐºÑ Ð¸ PR Ð´Ð¸ÑÑÐ¸Ð¿Ð»Ð¸Ð½Ð°Ð¼ Ð² ÐÐ£ÐÐµ.
Ð£ÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ¸Ð°ÑÐ° Ð²ÑÐ¾ÑÐ¾Ð³Ð¾ ÐºÑÑÑÐ°, Ð¾Ð±ÑÑÐ°ÑÑÐ¸ÑÑÑ Ð¿Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸ÑÐ¼ 42.03.01 Â«Ð ÐµÐºÐ»Ð°Ð¼Ð° Ð¸ ÑÐ²ÑÐ·Ð¸ Ñ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÑÑÂ», 42.03.01_01 Â«Ð ÐµÐºÐ»Ð°Ð¼Ð° Ð¸ ÑÐ²ÑÐ·Ð¸ Ñ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÑÑ Ð² Ð¾ÑÑÐ°ÑÐ»Ð¸ (Ð¡Ð²ÑÐ·Ð¸ Ñ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÑÑ)Â», 42.03.01_02 Â«Ð ÐµÐºÐ»Ð°Ð¼Ð° Ð¸ ÑÐ²ÑÐ·Ð¸ Ñ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÑÑ Ð² ÑÐ¸ÑÑÐµÐ¼Ðµ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¸ Ð¼ÑÐ½Ð¸ÑÐ¸Ð¿Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸ÑÂ», 42.03.01_04 Â«Ð ÐµÐºÐ»Ð°Ð¼Ð° Ð² Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½Ð¾Ð¼ ÑÐ¾ÑÑÑÐ´Ð½Ð¸ÑÐµÑÑÐ²ÐµÂ», Ð° ÑÐ°ÐºÐ¶Ðµ Ð´Ð»Ñ Ð¶ÐµÐ»Ð°ÑÑÐ¸Ñ Ð¾Ð²Ð»Ð°Ð´ÐµÑÑ ÑÐ·ÑÐºÐ¾Ð¼ Ð¿ÑÐ¾ÑÐµÑÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¾Ð±ÑÐµÐ½Ð¸Ñ PR-ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ¾Ð².
Grading and Inspection of Eggs and Egg Products
Creators: name: Pond, T. H.
name: Kilpatrick, Lester
name: Pond, T. H.
name: Kilpatrick, Lester
Publisher: name: Unknown
Year: 1961
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: Excerpt from the report Preface: The purpose of this bulletin is to present comprehensive information on one of the most important factors contributing to the improvement, identification, and maintenance of quality in the production and merchandising of eggs and egg products. In order to market eggs effectively to the greatest advantage to producers, consideration must be given to the consumer reaction on size, cleanliness of shells, and interior quality of shell eggs and the wholesomeness and functional quality of egg products. Producers do not have much incentive or adequate reward for producing and delivering clean, unbroken eggs of good interior quality unless their eggs are purchased by quality grade and weight class at proper price differentials.
Power-law solutions for TeVeS
Creators: name: Batista, C. E. Magalhaes
name: Zimdahl, W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The dynamics of TeVeS in a homogeneous and isotropic universe is shown to be equivalent to the dynamics of an interacting two-component system, consisting of a scalar field and a "fluid", related to the matter part, with explicitly given coupling term. Scaling solutions (solutions with a constant ratio of the energy densities of both components) in the "Einstein frame" are found which are exponentially expanding or contracting with no remaining freedom for Bekenstein's $F$ function. In the "physical frame" these solutions are of the power-law type. An equivalent General Relativity (GR) picture of the dynamics suggests that it is the scalar field which plays the role of dark matter, while the "matter" has to mimic (phantom-type) dark energy.
description: 24 pages, presentation improved, acepted for publication in Class.Quantum Grav.
Hierarchical Risk Parity and Minimum Variance Portfolio Design on NIFTY 50 Stocks
Creators: name: Sen, Jaydip
name: Mehtab, Sidra
name: Dutta, Abhishek
name: Mondal, Saikat
Publisher: name: arXiv
Year: 2022
Subjects: subject: Portfolio Management (q-fin.PM)
subject: Machine Learning (cs.LG)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Portfolio design and optimization have been always an area of research that has attracted a lot of attention from researchers from the finance domain. Designing an optimum portfolio is a complex task since it involves accurate forecasting of future stock returns and risks and making a suitable tradeoff between them. This paper proposes a systematic approach to designing portfolios using two algorithms, the critical line algorithm, and the hierarchical risk parity algorithm on eight sectors of the Indian stock market. While the portfolios are designed using the stock price data from Jan 1, 2016, to Dec 31, 2020, they are tested on the data from Jan 1, 2021, to Aug 26, 2021. The backtesting results of the portfolios indicate while the performance of the CLA algorithm is superior on the training data, the HRP algorithm has outperformed the CLA algorithm on the test data.
description: The is the preprint version of our published paper listed in the IEEE Xplore. The final paper is published in the Proceedings of the IEEE International Conference on Decision Aid Sciences and Applications, pp. 668-675, December 7-8, 2021, Bahrain. The preprint consists of 8 pages and it contains 32 figures and 9 tables
title: Ð¤Ð¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¸Ð±ÑÐ»Ð¸ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: Ð£ÑÐºÐ¾Ð²Ð°, ÐÐ°ÑÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð¿ÑÐ¸Ð±ÑÐ»Ñ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸
ÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¸Ð±ÑÐ»Ð¸
ÐºÐ¾Ð¼Ð¼ÐµÑÑÐµÑÐºÐ¸Ðµ ÑÐ°ÑÑ Ð¾Ð´Ñ
ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¿ÑÐ¸Ð±ÑÐ»ÑÑ

description: Ð¦ÐµÐ»ÑÑ Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÐµÑÑÑ Ð¾ÑÐµÐ½ÐºÐ° ÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¸Ð±ÑÐ»Ð¸ ÐÐÐ Â«ÐÑÐµÑÐ»Ð¾Ð²Â» Ð´Ð»Ñ Ð¿ÑÐ¸Ð½ÑÑÐ¸Ñ ÑÐµÑÐµÐ½Ð¸Ñ Ð¾ Ð¼ÐµÑÐ°Ñ ÐµÐµ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ¸Ð½Ð°Ð½ÑÐ¾Ð²Ð¾Ð³Ð¾ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ° Ð¿ÑÐ¸Ð±ÑÐ»Ð¸ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÐÐÐ Â«ÐÑÐµÑÐ»Ð¾Ð²Â». Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ Ð¼ÐµÑÑ Ð¿Ð¾ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ Ð¿ÑÐ¸Ð±ÑÐ»Ð¸ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸ Ð²ÑÑÐ²Ð»ÐµÐ½Ð¾, ÑÑÐ¾ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐ¼ ÑÐ°ÐºÑÐ¾ÑÐ¾Ð¼, ÑÑÐµÐ±ÑÑÑÐµÐ³Ð¾ ÑÐ»ÑÑÑÐµÐ½Ð¸Ñ, ÑÐ²Ð»ÑÑÑÑÑ ÐºÐ¾Ð¼Ð¼ÐµÑÑÐµÑÐºÐ¸Ðµ ÑÐ°ÑÑÐ¾Ð´Ñ. Ð¡Ð´ÐµÐ»Ð°Ð½ Ð¿ÑÐ¾Ð³Ð½Ð¾Ð· ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð¿ÑÐ¸Ð±ÑÐ»Ð¸ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ Ð½Ð° 2017 Ð³Ð¾Ð´.
Testing criminological theories beyond the West: evidence from Czechia during and after transition
Creators: name: Jíchová, Jana
name: Přidalová, Ivana
name: Ouředníček, Martin
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: While the theories of social disorganization and routine activities receive considerable support in explaining crime in Western Europe and America, their applicability to other geographical contexts remains largely unexplored. To fill this gap, this paper presents empirical evidence from a Central European post-socialist country, Czechia. Regression analyses at the level of administrative districts are used to identify the key variables affecting property and violent crime during the transformation from socialism to democracy during the 1990s and in the post-transformation period after 2010. Contrary to the Western and some other post-socialist contexts, the theories receive little support in the context of present-day Czechia. Reasons for the limited applicability of the theories to the Czech post-transformation setting are discussed.
Large-scale Personalized Video Game Recommendation via Social-aware Contextualized Graph Neural Network
Creators: name: Yang, Liangwei
name: Liu, Zhiwei
name: Wang, Yu
name: Wang, Chen
name: Fan, Ziwei
name: Yu, Philip S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Because of the large number of online games available nowadays, online game recommender systems are necessary for users and online game platforms. The former can discover more potential online games of their interests, and the latter can attract users to dwell longer in the platform. This paper investigates the characteristics of user behaviors with respect to the online games on the Steam platform. Based on the observations, we argue that a satisfying recommender system for online games is able to characterize: personalization, game contextualization and social connection. However, simultaneously solving all is rather challenging for game recommendation. Firstly, personalization for game recommendation requires the incorporation of the dwelling time of engaged games, which are ignored in existing methods. Secondly, game contextualization should reflect the complex and high-order properties of those relations. Last but not least, it is problematic to use social connections directly for game recommendations due to the massive noise within social connections. To this end, we propose a Social-aware Contextualized Graph Neural Recommender System (SCGRec), which harnesses three perspectives to improve game recommendation. We conduct a comprehensive analysis of users' online game behaviors, which motivates the necessity of handling those three characteristics in the online game recommendation.
Device Model for Graphene Bilayer Field-Effect Transistor
Creators: name: Ryzhii, V.
name: Ryzhii, M.
name: Satou, A.
name: Otsuji, T.
name: Kirova, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present an analytical device model for a graphene bilayer field-effect transistor (GBL-FET) with a graphene bilayer as a channel, and with back and top gates. The model accounts for the dependences of the electron and hole Fermi energies as well as energy gap in different sections of the channel on the bias back-gate and top-gate voltages. Using this model, we calculate the dc and ac source-drain currents and the transconductance of GBL-FETs with both ballistic and collision dominated electron transport as functions of structural parameters, the bias back-gate and top-gate voltages, and the signal frequency. It is shown that there are two threshold voltages, $V_{th,1}$ and $V_{th,2}$, so that the dc current versus the top-gate voltage relation markedly changes depending on whether the section of the channel beneath the top gate (gated section) is filled with electrons, depleted, or filled with holes. The electron scattering leads to a decrease in the dc and ac currents and transconductances, whereas it weakly affects the threshold frequency. As demonstrated, the transient recharging of the gated section by holes can pronouncedly influence the ac transconductance resulting in its nonmonotonic frequency dependence with a maximum at fairly high frequencies.
description: 10 pages, 4 figures
Mehrsprachigkeitsbewusstheit in digitalen Lernumgebungen: Das virtuelle Austauschprojekt „Linguistic Landscapes Leipzig – Auckland“
Creators: name: Feick, Diana
name: Knorr, Petra
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: virtuelles Austauschprojekt
subject: Sprachlandschaften
subject: Mehrsprachigkeitsbewusstheit
subject: Lehrendenbildung
subject: Sprachwahl
subject: Sprachverwendung
subject: virtual exchange projects
subject: linguistic landscapes
subject: language awareness
subject: multilingual awareness
subject: teacher education
subject: design-based research
subject: language choice
subject: language use
subject: 400 Sprache
subject: 370 Bildung und Erziehung
subject: 378 Hochschulbildung
subject: 407 Ausbildung, Forschung, verwandte Themen

description: Der folgende Beitrag widmet sich der Frage, inwiefern ein virtuelles Austauschprojekt zum Thema linguistic landscapes zur Herausbildung von Mehrsprachigkeitsbewusstheit von zukünftigen Fremd¬sprachenlehrenden beitragen kann. Die Grundlage dafür bildet ein digitales, nach Prinzipien des design-based research angelegtes Kooperationsprojekt zwischen Studierenden in Leipzig (LPZ) und Auckland (AKL, Neuseeland), die linguistic landscapes an beiden Standorten dokumentierten und komparativ analysierten. Anhand der Projektprodukte (multimediale Poster, Präsentationen, Berichte) sowie Fragebögen und einem Fokusgruppeninterview wurde ermittelt, wie angehende Lehrpersonen über das eigene Erleben (Innensicht) und die damit verzahnten Metareflexionen aus der Lehrendenperspektive (Außensicht) eine Perspektivendopplung erfahren, die u. a. zur Förderung von Mehrsprachigkeitsbewusstheit beitrug.
description: The paper presents research results from a design-based research (DBR) study on a virtual exchange project (VEP) at two universities. Students of German as a Foreign Language in Auckland (New Zealand) and EFL Teacher Students in Leipzig collaborated working on the task of documenting, analyzing and comparing the linguistic landscape in their respective cities. The focus in this paper will be on the potentials of VEPs for the development of students’ (critical) multilingual awareness. The reported results are based on the analysis of student products (multimedia posters, project presentations, reports), feedback questionnaires and a focus group interview. Student teachers were able to participate in the project both as learners as well as prospective teachers and this double focus was supposed to lead to an increased awareness of the potentials and challenges of virtual exchanges. The results of the study point toward the suitability of using VEPs in teacher education to engage students in reflective practice on aspects of multilingual awareness.
Reversible Tuning of Magnetization in a Ferromagnetic Ruddlesden–Popper-Type Manganite by Electrochemical Fluoride-Ion Intercalation
Creators: name: Vasala, Sami
name: Jakob, Anna
name: Wissel, Kerstin
name: Waidha, Aamir Iqbal
name: Alff, Lambert
name: Clemens, Oliver
Publisher: name: FID GEO
Year: 2019

description: Abstract Electrical tuning of materials' magnetic properties is of great technological interest, and in particular reversible on/off switching of ferromagnetism can enable various new applications. Reversible magnetization tuning in the ferromagnetic Ruddlesden–Popper manganite La2−2xSr1+2xMn2O7 by electrochemical fluoride-ion (de)intercalation in an all-solid-state system is demonstrated for the first time. A 67% change in relative magnetization is observed with a low operating potential of <1 V, negligible capacity fading, and high Coulombic efficiency. This system offers a high magnetoelectric voltage coefficient, indicating high energy efficiency. This method can also be extended to tune other materials' properties in various perovskite-related materials.
title: ÐÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Â«AgileÂ» Ð² ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð²ÐµÑÐµÐ¹ Ð½Ð° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ Â«Ready for SkyÂ»
title: Ð¼Ð°Ð³Ð¸ÑÑÐµÑÑÐºÐ°Ñ Ð´Ð¸ÑÑÐµÑÑÐ°ÑÐ¸Ñ
titleType: Subtitle
Creators: name: Ð¤ÐµÐ´Ð¾ÑÐ¾Ð²Ð°, ÐÐ°Ð¹Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: ÐÐ½ÑÐµÑÐ½ÐµÑ
Ð³Ð¸Ð±ÐºÐ°Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ñ

description: Ð¦ÐµÐ»Ñ ÑÐ°Ð±Ð¾ÑÑ - Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð¸ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Â«AgileÂ» Ð² ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð²ÐµÑÐµÐ¹ Ð½Ð° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ Â«Ready for SkyÂ». ÐÐ»Ñ Ð´Ð¾ÑÑÐ¸Ð¶ÐµÐ½Ð¸Ñ ÑÐµÐ»Ð¸ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð¸ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ñ ÑÑÐ°Ð½Ð´Ð°ÑÑÑ Ð¸ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸ Ð¸ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¸ Ð¿ÑÐ¸Ð¼ÐµÐ½Ð¸Ð¼Ð¾ÑÑÑ Ð³Ð¸Ð±ÐºÐ¸Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¹, Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½ Ð²ÑÐ±Ð¾Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Â«AgileÂ» Ð² ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð²ÐµÑÐµÐ¹, Ð¿Ð¾ÑÑÑÐ¾ÐµÐ½Ñ Ð¼Ð¾Ð´ÐµÐ»Ð¸ Ð±Ð¸Ð·Ð½ÐµÑ Ð¿ÑÐ¾ÑÐµÑÑÐ¾Ð² Ð² ÑÐ°Ð¼ÐºÐ°Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð² Ð¿Ð¾ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð²ÐµÑÐµÐ¹ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Â«AgileÂ» Â«ÐºÐ°Ðº ÐµÑÑÑÂ» Ð¸ Â«ÐºÐ°Ðº Ð´Ð¾Ð»Ð¶Ð½Ð¾ Ð±ÑÑÑÂ», Ð¾Ð¿Ð¸ÑÐ°Ð½Ñ ÑÑÐ°Ð¿Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð² Ð¿Ð¾ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð²ÐµÑÐµÐ¹ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Â«AgileÂ», Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¾Ð¶Ð¸Ð´Ð°ÐµÐ¼ÑÑ Ð¸ ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð² Ð¿Ð¾ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð²ÐµÑÐµÐ¹ Ð¸ Ð²ÑÐ´Ð²Ð¸Ð½ÑÑÑ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¾ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¹ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸ Ð¿Ð¾ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð²ÐµÑÐµÐ¹. ÐÑÐ¾Ð³Ð¸ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÑÐ¸ÑÐ°ÑÑÑÑ Ð¿Ð¾Ð»ÐµÐ·Ð½ÑÐ¼Ð¸ ÐºÐ°Ðº Ð´Ð»Ñ Ð¼ÐµÐ½ÐµÐ´Ð¶ÐµÑÐ¾Ð², ÑÐ¶Ðµ ÑÐ°Ð±Ð¾ÑÐ°ÑÑÐ¸Ñ Ñ Agile Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸ÑÐ¼Ð¸, ÑÐ°Ðº Ð¸ ÑÐµÐ¼, ÐºÑÐ¾ Ð»Ð¸ÑÑ Ð½Ð°Ð¼ÐµÑÐµÐ²Ð°ÐµÑÑÑ Ð¸Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½Ð¸ÑÑ Ð² Ð¾Ð´Ð½Ð¾Ð¼ Ð¸Ð· Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐ¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð² Ð¸Ð»Ð¸ Ð²Ð²ÐµÑÑÐ¸ Ð½Ð° ÑÐ²Ð¾ÐµÐ¼ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸.
Phase diagrams of SU(N) gauge theories with fermions in various representations
Creators: name: Myers, Joyce C.
name: Ogilvie, Michael C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We minimize the one-loop effective potential for SU(N) gauge theories including fermions with finite mass in the fundamental (F), adjoint (Adj), symmetric (S), and antisymmetric (AS) representations. We calculate the phase diagram on S^1 x R^3 as a function of the length of the compact dimension, beta, and the fermion mass, m. We consider the effect of periodic boundary conditions [PBC(+)] on fermions as well as antiperiodic boundary conditions [ABC(-)]. The use of PBC(+) produces a rich phase structure. These phases are distinguished by the eigenvalues of the Polyakov loop P. Minimization of the effective potential for QCD(AS/S,+) results in a phase where | Im Tr P | is maximized, resulting in charge conjugation (C) symmetry breaking for all N and all values of (m beta), however, the partition function is the same up to O(1/N) corrections as when ABC are applied. Therefore, regarding orientifold planar equivalence, we argue that in the one-loop approximation C-breaking in QCD(AS/S,+) resulting from the application of PBC to fermions does not invalidate the large N equivalence with QCD(Adj,-). Similarly, with respect to orbifold planar equivalence, breaking of Z(2) interchange symmetry resulting from application of PBC to bifundamental (BF) representation fermions does not invalidate equivalence with QCD(Adj,-) in the one-loop perturbative limit because the partition functions of QCD(BF,-) and QCD(BF,+) are the same. Of particular interest as well is the case of adjoint fermions where for Nf > 1 Majorana flavour confinement is obtained for sufficiently small (m beta), and deconfinement for sufficiently large (m beta). For N >= 3 these two phases are separated by one or more additional phases, some of which can be characterized as partially-confining phases.
description: 39 pages, 26 figures, JHEP3; references added, small corrections made
Towards Property-Based Tests in Natural Language
Creators: name: Gordon, Colin S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: We consider a new approach to generate tests from natural language. Rather than relying on machine learning or templated extraction from structured comments, we propose to apply classic ideas from linguistics to translate natural-language sentences into executable tests. This paper explores the application of combinatory categorial grammars (CCGs) to generating property-based tests. Our prototype is able to generate tests from English descriptions for each example in a textbook chapter on property-based testing.
Recent advances in the study of Arctic submarine permafrost
Creators: name: Angelopoulos, Michael
name: Overduin, Pier P.
name: Miesner, Frederieke
name: Grigoriev, Mikhail N.
name: Vasiliev, Alexander A.
Publisher: name: FID GEO
Year: 2020

description: Submarine permafrost is perennially cryotic earth material that lies offshore. Most submarine permafrost is relict terrestrial permafrost beneath the Arctic shelf seas, was inundated after the last glaciation, and has been warming and thawing ever since. As a reservoir and confining layer for gas hydrates, it has the potential to release greenhouse gasses and impact coastal infrastructure, but its distribution and rate of thaw are poorly constrained by observational data. Lengthening summers, reduced sea ice extent and increased solar heating will increase water temperatures and thaw rates. Observations of gas release from the East Siberian shelf and high methane concentrations in the water column and air above it have been attributed to flowpaths created in thawing permafrost. In this context, it is important to understand the distribution and state of submarine permafrost and how they are changing. We assemble recent and historical drilling data on regional submarine permafrost degradation rates and review recent studies that use modelling, geophysical mapping and geomorphology to characterize submarine permafrost. Implications for submarine permafrost thawing are discussed within the context of methane cycling in the Arctic Ocean and global climate change.
Intercultural communicative competence and virtual encounters through telecollaboration: an empirical study
Creators: name: Stratilaki-Klein, Sofia
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: telecollaboration
subject: intercultural interaction
subject: plurilingual competence
subject: educational cultures
subject: plural identities
subject: TILA
subject: télécollaboration
subject: interaction interculturelle
subject: compétence plurilingue
subject: cultures éducatives
subject: identités plurielles
subject: 370 Bildung und Erziehung
subject: 400 Sprache

description: This article presents the results of a research conducted on intercultural interactions between teachers from different educational cultures who participated in the European TILA project. It deals in particular with the question of teachers' representations and their evolution with regard to their pedagogical practices through telecollaboration. The plurilingual dimension, present in this setting, performs at different levels and emerges in a plural and differentiated way for these teachers. The author shows that the digital space of language teaching initiated by telecollaboration no longer makes communication a pretext for language practice. In this framework, the languages in contact and the cultures in presence become the essential and integrated process of communication. However, the received representations that some teachers associate with technology are such that they find it difficult to envisage the link between learning and telecollaboration. It is therefore a whole field to be explored for the initial and continuous training of teachers, which is rarely open to this plurilingual and intercultural dimension of digital technology.
description: Cet article présente les résultats d’une recherche menée sur les interactions interculturelles entre enseignants des cultures éducatives différentes ayant participé au projet européen TILA. II aborde en particulier la question des représentations des enseignants et de leurs évolutions au regard de leurs pratiques pédagogiques au moyen du dispositif de télécollaboration. La dimension plurilingue, présente dans ce dispositif, s’actualise selon différents niveaux et émerge de façon plurielle et différenciée chez ces enseignants. L’auteur montre que l’espace numérique de l’enseignement des langues qu’initie la télécollaboration ne fait plus de la communication un prétexte à la pratique de la langue. Dans ce cadre, les langues en contact et les cultures en présence deviennent bien le processus essentiel et intégré de la communication. Or, les représentations reçues que certains enseignants associent aux technologies sont telles qu'ils envisagent difficilement le lien entre apprentissage et télécollaboration. C’est alors tout un champ à explorer pour la formation initiale et continue des enseignants qui s’ouvre rarement à cette dimension plurilingue et interculturelle du numérique.
title: Ð¡Ð¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¼ÐµÑ Ð°Ð½Ð¸Ð·Ð¼Ð¾Ð² Ð¿ÑÐ¾ÑÐ¸Ð²Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ ÐºÐ¾ÑÑÑÐ¿ÑÐ¸Ð¸ Ð² Ð¾ÑÐ³Ð°Ð½Ð°Ñ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¸ Ð¼ÑÐ½Ð¸ÑÐ¸Ð¿Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ
title: Ð¼Ð°Ð³Ð¸ÑÑÐµÑÑÐºÐ°Ñ Ð´Ð¸ÑÑÐµÑÑÐ°ÑÐ¸Ñ
titleType: Subtitle
Creators: name: ÐÐ¸ÑÐ¾Ð½ÑÐº, ÐÐ¸ÐºÐ¾Ð»Ð°Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: ÐºÐ¾ÑÑÑÐ¿ÑÐ¸Ñ
ÑÐ¸Ð½Ð¾Ð²Ð½Ð¸ÐºÐ¸
Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ðµ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ

description: ÐÐ·Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ñ Ð¿ÑÐ°Ð²Ð¾Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ð¹ Ð¸ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð° Ð¾Ð±ÑÐµÑÑÐ²Ð° Ð½ÐµÐ¸Ð·Ð¼ÐµÐ½Ð½Ð¾ Ð²ÑÐ·ÑÐ²Ð°ÑÑ Ð·Ð½Ð°ÑÐ¸ÑÐµÐ»ÑÐ½ÑÐµ Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð² Ð·Ð°ÐºÐ¾Ð½Ð¾Ð´Ð°ÑÐµÐ»ÑÑÑÐ²Ðµ Ð Ð¾ÑÑÐ¸Ð¸. ÐÐ¾Ð²ÑÐµ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐµÐ°Ð»Ð¸Ð¸ Ð¿Ð¾ÑÑÐ°Ð²Ð¸Ð»Ð¸ Ð½Ð¾Ð²ÑÐµ ÑÐµÐ»Ð¸ Ð¸ ÑÐ¾Ð·Ð´Ð°Ð»Ð¸ ÐºÐ°ÑÐ´Ð¸Ð½Ð°Ð»ÑÐ½Ð¾ Ð¾Ð±Ð½Ð¾Ð²Ð»ÐµÐ½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¿ÑÐ°Ð²Ð¾Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ð¹. ÐÑÐ±Ð¾Ñ ÑÐµÐ¼Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¾Ð±ÑÑÐ»Ð¾Ð²Ð»ÐµÐ½ ÑÐµÐ¼, ÑÑÐ¾ Ð³Ð»Ð¾Ð±Ð°Ð»ÑÐ½ÑÐµ Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð²Ð¾ Ð²Ð½ÐµÑÐ½ÐµÐ¹ Ð¸ Ð²Ð½ÑÑÑÐµÐ½Ð½ÐµÐ¹ ÑÑÐµÐ´Ðµ Ð¸ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐµÑÐ¾ÑÐ¼Ñ Ð² Ð Ð¾ÑÑÐ¸Ð¸ Ð¿Ð¾Ð²Ð»Ð¸ÑÐ»Ð¸ Ð½Ð° ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ðµ Ð² ÑÑÑÐ°Ð½Ðµ Ð·Ð°ÐºÐ¾Ð½Ð¾Ð´Ð°ÑÐµÐ»ÑÑÑÐ²Ð° Ð¿Ð¾ Ð±Ð¾ÑÑÐ±Ðµ Ñ ÐºÐ¾ÑÑÑÐ¿ÑÐ¸ÐµÐ¹. ÐÐ¾ Ð¾Ð¿ÑÑÐ° Ð² Ð´Ð°Ð½Ð½Ð¾Ð¹ Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð² Ð½Ð°ÑÐµÐ¹ ÑÑÑÐ°Ð½Ðµ Ð½ÐµÐ´Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾. ÐÐ¾ÑÑÐ¾Ð¼Ñ Ð½Ð°ÑÐ° ÑÑÑÐ°Ð½Ð° Ð½ÑÐ¶Ð´Ð°ÐµÑÑÑ Ð² Ð½Ð°ÑÑÐ½ÑÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸ÑÑ Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð²Ð¾Ð¿ÑÐ¾ÑÐ°.
title: ÐÑÐ½Ð¾Ð²Ñ Ð³ÑÐ°ÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸ Ð² Ð¼Ð°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ð¸. Ð§. 1, ÐÐ²ÐµÐ´ÐµÐ½Ð¸Ðµ Ð² ÐºÑÑÑ Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ½Ð¾Ð¹ Ð³ÑÐ°ÑÐ¸ÐºÐ¸
title: [Ð² 3 ÑÐ°ÑÑÑÑ ]
titleType: Subtitle
Creators: name: ÐÑÑÑÐ¾Ð², ÐÐ»Ð°Ð´Ð¸Ð¼Ð¸Ñ
name: Ð¢ÑÐµÑÐ»Ñ, ÐÑÑÐµÑÐ»Ð°Ð²
name: ÐÐ¾ÑÑÐ°ÐºÐ¾Ð²Ð°, ÐÐ»ÑÐ³Ð°
Publisher: name: ÐÐÐÐ°Ñ
Year: 2011
Subjects: Ð§ÐµÑÑÐµÐ½Ð¸Ðµ Ð¼Ð°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÐ½Ð¾Ðµ
ÐÐ½Ð¶ÐµÐ½ÐµÑÐ½Ð°Ñ Ð³ÑÐ°ÑÐ¸ÐºÐ°

description: Ð¡Ð´ÐµÐ»Ð°Ð½Ð° Ð¿Ð¾Ð¿ÑÑÐºÐ° Ð¸Ð·Ð»Ð¾Ð¶Ð¸ÑÑ Ð¾ÑÐ½Ð¾Ð²Ñ Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ½Ð¾Ð¹ Ð³ÑÐ°ÑÐ¸ÐºÐ¸ Ð´Ð»Ñ Ð¼Ð°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾Ð¸ÑÐµÐ»ÐµÐ¹ Ð² ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²Ð¸Ð¸ Ñ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÐ¼Ð¸ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¸ÑÐ¼Ð¸ Ð¾ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð°Ñ Ð²Ð¸Ð·ÑÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸. Ð£ÑÐµÐ±Ð½Ð¾-Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð², Ð¸Ð·ÑÑÐ°ÑÑÐ¸Ñ Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ½ÑÑ Ð³ÑÐ°ÑÐ¸ÐºÑ Ð¸ ÐºÐ¾Ð½ÑÑÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ Ð´ÐµÑÐ°Ð»ÐµÐ¹ Ð¸ Ð¼ÐµÑÐ°Ð½Ð¸Ð·Ð¼Ð¾Ð², Ð° ÑÐ°ÐºÐ¶Ðµ Ð´Ð»Ñ Ð°ÑÐ¿Ð¸ÑÐ°Ð½ÑÐ¾Ð² Ð¸ ÐÐ¢Ð , ÑÐ²ÑÐ·Ð°Ð½Ð½ÑÑ Ð² ÑÐ²Ð¾ÐµÐ¹ Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ñ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¾ÑÑÐºÐ¸Ð¼Ð¸ ÑÐ°Ð±Ð¾ÑÐ°Ð¼Ð¸.
Perception de l’intégration des outils numériques dans l’agir professoral : une étude de cas auprès de trois enseignants de FLE
Creators: name: Xue, Lin
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: TIC
subject: agir professoral
subject: théorie de l’activité
subject: médiation
subject: français langue étrangèr
subject: ICT
subject: teacher cognition
subject: activity theory
subject: mediation
subject: French as a foreign language
subject: 400 Sprache
subject: 370 Bildung und Erziehung

description: L’intégration des outils numériques dans l’enseignement-apprentissage des langues, top-down (issue des demandes institutionnelles) ou bottom-up (à l’initiative de l’enseignant), signifie la présence de nouveaux éléments dans l’univers de l’agir professoral et suscitera des réactions différentes selon les enseignants. Nous verrons donc comment trois enseignants de Français Langue Etrangère (désormais FLE) e positionnent par rapport à différents outils numériques disponibles dans leurs activités d’enseignement. Il s’agira, en s’appuyant sur la théorie de l’activité (Léontiev, [1978]2009), d’analyser les discours de verbalisation de ces trois enseignants de FLE suivis par un dispositif d’observation et d’entretiens sur un semestre. Nous nous intéresserons notamment à leurs attitudes envers différents outils numériques présents dans leur univers professionnel ainsi que les manières dont ils les intègrent dans leur agir professoral.
description: The introduction of digital tools in language teaching, whether it be top-down (resulting from institutional demands) or bottom-up (at the teacher’s initiative), means the presence of new elements in the teachers’ existing thinking patterns and, depending on the teachers, may lead to different reactions. In this paper, we will see how three teachers of French as a foreign language position themselves in relation to different ICT tools available in their teaching activities. By using the activity theory (Léontiev, [1978]2009), we will try to analyze how the three teachers describe their practice, each being followed up by a longitudinal approach. The focus will be on their attitudes towards different digital tools as well as the ways in which they integrate them in their teacher thinking and teaching activities.
Higgs in Space!
Creators: name: Jackson, C. B.
name: Servant, Geraldine
name: Shaughnessy, Gabe
name: Tait, Tim M. P.
name: Taoso, Marco
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider the possibility that the Higgs can be produced in dark matter annihilations, appearing as a line in the spectrum of gamma rays at an energy determined by the masses of the WIMP and the Higgs itself. We argue that this phenomenon occurs generally in models in which the the dark sector has large couplings to the most massive states of the SM and provide a simple example inspired by the Randall-Sundrum vision of dark matter, whose 4d dual corresponds to electroweak symmetry-breaking by strong dynamics which respect global symmetries that guarantee a stable WIMP. The dark matter is a Dirac fermion that couples to a Z' acting as a portal to the Standard Model through its strong coupling to top quarks. Annihilation into light standard model degrees of freedom is suppressed and generates a feeble continuum spectrum of gamma rays. Loops of top quarks mediate annihilation into gamma Z, gamma h, and gamma Z', providing a forest of lines in the spectrum. Such models can be probed by the Fermi/GLAST satellite and ground-based Air Cherenkov telescopes.
description: 27 pages, 13 figures minor clarifications, references added, results unchanged, version to be published in JCAP
Entropy and Temperature From Black-Hole/Near-Horizon-CFT Duality
Creators: name: Rodriguez, Leo
name: Yildirim, Tuna
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a 2-dimensional CFT, in the form of a Liouville theory, in the near horizon limit of 4- and 3-dimensional black holes. The near horizon CFT assumes 2-dimensional black hole solutions first introduced by Christensen and Fulling and expanded to a greater class of black holes via Robinson and Wilczek. The 2-dimensional black holes admit a Diff($S^1$) subalgebra, which upon quantization in the horizon limit becomes Virasoro with calculable central charge. This charge and lowest Virasoro eigen-mode reproduce the correct Bekenstein-Hawking entropy of the 4- and 3-dimensional black holes via the known Cardy formula. Furthermore, the 2-dimensional CFT's energy momentum tensor is anomalous. However, In the horizon limit the energy momentum tensor becomes holomorphic equaling the Hawking flux of the 4- and 3-dimensional black holes. This encoding of both entropy and temperature provides a uniformity in the calculation of black hole thermodynamic and statistical quantities for the non local effective action approach.
description: 18 pages, references added, accepted in IOP's Classical and Quantum Gravity.
Energy Management Based on Multi-Agent Deep Reinforcement Learning for A Multi-Energy Industrial Park
Creators: name: Zhu, Dafeng
name: Yang, Bo
name: Liu, Yuxiang
name: Wang, Zhaojian
name: Ma, Kai
name: Guan, Xinping
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Owing to large industrial energy consumption, industrial production has brought a huge burden to the grid in terms of renewable energy access and power supply. Due to the coupling of multiple energy sources and the uncertainty of renewable energy and demand, centralized methods require large calculation and coordination overhead. Thus, this paper proposes a multi-energy management framework achieved by decentralized execution and centralized training for an industrial park. The energy management problem is formulated as a partially-observable Markov decision process, which is intractable by dynamic programming due to the lack of the prior knowledge of the underlying stochastic process. The objective is to minimize long-term energy costs while ensuring the demand of users. To solve this issue and improve the calculation speed, a novel multi-agent deep reinforcement learning algorithm is proposed, which contains the following key points: counterfactual baseline for facilitating contributing agents to learn better policies, soft actor-critic for improving robustness and exploring optimal solutions. A novel reward is designed by Lagrange multiplier method to ensure the capacity constraints of energy storage. In addition, considering that the increase in the number of agents leads to performance degradation due to large observation spaces, an attention mechanism is introduced to enhance the stability of policy and enable agents to focus on important energy-related information, which improves the exploration efficiency of soft actor-critic. Numerical results based on actual data verify the performance of the proposed algorithm with high scalability, indicating that the industrial park can minimize energy costs under different demands.
description: Accepted by Applied Energy
title: ÐÐµÑÐ¸ÑÑÐ°ÑÐ¾ÑÑ Ð´Ð»Ñ ÑÐ¸ÑÑÐ¾Ð°Ð½Ð°Ð»Ð¾Ð³Ð¾Ð²ÑÑ Ð¿ÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÐµÐ¹
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ°Ð»Ð°Ð¿Ð¿Ð°ÑÑÐ¸, ÐÑÑÑÐ³Ðµ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: ÐÐµÑÐ¸ÑÑÐ°ÑÐ¾ÑÑ
ÐÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»Ð¸ Ð°Ð½Ð°Ð»Ð¾Ð³Ð¾-ÑÐ¸ÑÑÐ¾Ð²ÑÐµ
Ð±Ð¸Ð½Ð°ÑÐ½Ð°Ñ ÑÑÑÑÐºÑÑÑÐ°
ÑÐ½Ð°ÑÐ½Ð°Ñ ÑÑÑÑÐºÑÑÑÐ°
ÑÐµÐ³Ð¼ÐµÐ½ÑÐ½Ð°Ñ ÑÑÑÑÐºÑÑÑÐ°

description: ÐÐ±ÑÐµÐºÑÐ¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÑÑÑÑ Ð´ÐµÑÐ¸ÑÑÐ°ÑÐ¾ÑÑ Ð´Ð»Ñ ÑÐ¸ÑÑÐ¾Ð°Ð½Ð°Ð»Ð¾Ð³Ð¾Ð²ÑÑ Ð¿ÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÐµÐ¹. Ð¦ÐµÐ»Ñ ÑÐ°Ð±Ð¾ÑÑ - Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ ÑÑÐ°Ð²Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÐµÐ¼ Ð´ÐµÑÐ¸ÑÑÐ°ÑÐ¾ÑÐ¾Ð² Ð´Ð»Ñ ÑÐ¸ÑÑÐ¾Ð°Ð½Ð°Ð»Ð¾Ð³Ð¾Ð²ÑÑ Ð¿ÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÐµÐ¹. ÐÐµÑÐ¸ÑÑÐ°ÑÐ¾ÑÑ ÑÑÐ°Ð²Ð½Ð¸Ð²Ð°ÑÑÑÑ Ð¿Ð¾ ÑÐµÐ³ÑÐ»ÑÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÑÐºÑÑÑÑ, ÑÐ¸ÑÐ»Ñ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð², Ð²ÑÐµÐ¼ÐµÐ½Ð¸ Ð·Ð°Ð´ÐµÑÐ¶ÐºÐ¸ Ð¿ÐµÑÐµÐºÐ»ÑÑÐµÐ½Ð¸Ñ Ð¸ Ð¿Ð¾ÑÑÐµÐ±Ð»ÑÐµÐ¼Ð¾Ð¼Ñ ÑÐ¾ÐºÑ. ÐÑÐµÐ´Ð»Ð°Ð³Ð°ÐµÑÑÑ ÑÑÐµÐ¼Ð° Ð´ÐµÑÐ¸ÑÑÐ°ÑÐ¾ÑÐ° Ñ Ð¼Ð°Ð»ÑÐ¼ Ð¿Ð¾ÑÑÐµÐ±Ð»ÑÐµÐ¼ÑÐ¼ ÑÐ¾ÐºÐ¾Ð¼ Ð¸ Ð¼Ð°Ð»ÑÐ¼ ÑÐ¸ÑÐ»Ð¾Ð¼ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð², ÐºÐ¾Ð½ÐºÑÑÐµÐ½ÑÐ¾ÑÐ¿Ð¾ÑÐ¾Ð±Ð½Ð°Ñ Ð¿Ð¾ Ð±ÑÑÑÑÐ¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ.
Sinking of Gelatinous Zooplankton Biomass Increases Deep Carbon Transfer Efficiency Globally
Creators: name: Lebrato, Mario
name: Pahlow, Markus
name: Frost, Jessica R.
name: Küter, Marie
name: De Jesus Mendes, Pedro
name: Molinero, Juan-Carlos
name: Oschlies, Andreas
Publisher: name: FID GEO
Year: 2019

description: Gelatinous zooplankton (Cnidaria, Ctenophora, and Urochordata, namely, Thaliacea) are ubiquitous members of plankton communities linking primary production to higher trophic levels and the deep ocean by serving as food and transferring “jelly-carbon” (jelly-C) upon bloom collapse. Global biomass within the upper 200 m reaches 0.038 Pg C, which, with a 2–12 months life span, serves as the lower limit for annual jelly-C production. Using over 90,000 data points from 1934 to 2011 from the Jellyfish Database Initiative as an indication of global biomass (JeDI: http://jedi.nceas.ucsb.edu, http://www.bco-dmo.org/dataset/526852), upper ocean jelly-C biomass and production estimates, organism vertical migration, jelly-C sinking rates, and water column temperature profiles from GLODAPv2, we quantitatively estimate jelly-C transfer efficiency based on Longhurst Provinces. From the upper 200 m production estimate of 0.038 Pg C year−1, 59–72% reaches 500 m, 46–54% reaches 1,000 m, 43–48% reaches 2,000 m, 32–40% reaches 3,000 m, and 25–33% reaches 4,500 m. This translates into ~0.03, 0.02, 0.01, and 0.01 Pg C year−1, transferred down to 500, 1,000, 2,000, and 4,500 m, respectively. Jelly-C fluxes and transfer efficiencies can occasionally exceed phytodetrital-based sediment trap estimates in localized open ocean and continental shelves areas under large gelatinous blooms or jelly-C mass deposition events, but this remains ephemeral and transient in nature. This transfer of fast and permanently exported carbon reaching the ocean interior via jelly-C constitutes an important component of the global biological soft-tissue pump, and should be addressed in ocean biogeochemical models, in particular, at the local and regional scale.
title: Euro area sovereign debt: restructuring options
Creators: name: Arnold, Theresa
name: Gulati, Mitu
name: Panizza, Ugo
Publisher: name: Graduate Institute of International and Development Studies
publisherIdentifier: https://ror.org/007ygn379
publisherIdentifierScheme: ROR
Year: 2019

description: Graduate Institute of International and Development Studies Working Paper ; no. 18/2019
Strange Quark stars: Observations & Speculations
Creators: name: Xu, Renxin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Two kinds of difficulties have challenged the physics community for many years: (1) knowing nature's building blocks (particle physics) and (2) understanding interacting many-body systems (many-body physics). Both of them exist in the research of quark matter and compact stars. This paper addresses the possibility that quark clustering, rather than a color super-conducting state, could occur in cold quark matter at realistic baryon densities of compact stars, since a weakly coupling treatment of the interaction between quarks might not be reliable. Cold quark matter is conjectured to be in a solid state if thermal kinematic energy is much lower than the interaction energy of quark clusters. Different manifestations of pulsar-like compact stars are discussed, as well as modeled in a regime of solid quark stars.
description: 9 pages, 3 figures; talk at SQM2008; discussion added
Evolution of the Geomagnetic Daily Variation at Tatuoca, Brazil, From 1957 to 2019: A Transition From Sq to EEJ
Creators: name: Soares, G.
name: Yamazaki, Y.
name: Cnossen, I.
name: Matzka, J.
name: Pinheiro, K. J.
name: Morschhauser, A.
name: Alken, P.
name: Stolle, C.
Publisher: name: FID GEO
Year: 2020

description: The magnetic equator in the Brazilian region has moved over 1,100 km northward since 1957, passing the geomagnetic observatory Tatuoca (TTB), in northern Brazil, around 2013. We recovered and processed TTB hourly mean values of the geomagnetic field horizontal (H) component from 1957 until 2019, allowing the investigation of long-term changes in the daily variation due to the influence of secular variation, solar activity, season, and lunar phase. The H day-to-day variability and the occurrence of the counter electrojet at TTB were also investigated. Until the 1990s, ionospheric solar quiet currents dominated the quiet-time daily variation at TTB. After 2000, the magnitude of the daily variation became appreciably greater due to the equatorial electrojet (EEJ) contribution. The H seasonal and day-to-day variability increased as the magnetic equator approached, but their amplitudes normalized to the average daily variation remained at similar levels. Meanwhile, the amplitude of the lunar variation, normalized in the same way, increased from 5% to 12%. Within the EEJ region, the occurrence rate of the morning counter electrojet (MCEJ) increased with proximity to the magnetic equator, while the afternoon counter electrojet (ACEJ) did not. EEJ currents derived from CHAMP and Swarm satellite data revealed that the MCEJ rate varies with magnetic latitude within the EEJ region while the ACEJ rate is largely constant. Simulations with the Thermosphere-Ionosphere-Electrodynamics General Circulation Model based on different geomagnetic main field configurations suggest that long-term changes in the geomagnetic daily variation at TTB can be attributed to the main field secular variation.