cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Innovative Approach to Balancing Chemical-Reaction Equations: A Simplified Matrix-Inversion Technique for Determining The Matrix Null Space
Creators: name: Thorne, Lawrence R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: I propose a novel approach to balancing equations that is applicable to all chemical-reaction equations; it is readily accessible to students via scientific calculators and basic computer spreadsheets that have a matrix-inversion application. The new approach utilizes the familiar matrix-inversion operation in an unfamiliar and innovative way; its purpose is not to identify undetermined coefficients as usual, but, instead, to compute a matrix null space (or matrix kernel). The null space then provides the coefficients that balance the equation. Indeed, the null space contains everything there is to know about balancing any chemical-reaction equation!
description: 7 pages, including appendix
Faster First-Order Primal-Dual Methods for Linear Programming using Restarts and Sharpness
Creators: name: Applegate, David
name: Hinder, Oliver
name: Lu, Haihao
name: Lubin, Miles
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: First-order primal-dual methods are appealing for their low memory overhead, fast iterations, and effective parallelization. However, they are often slow at finding high accuracy solutions, which creates a barrier to their use in traditional linear programming (LP) applications. This paper exploits the sharpness of primal-dual formulations of LP instances to achieve linear convergence using restarts in a general setting that applies to ADMM (alternating direction method of multipliers), PDHG (primal-dual hybrid gradient method) and EGM (extragradient method). In the special case of PDHG, without restarts we show an iteration count lower bound of $Ω(κ^2 \log(1/ε))$, while with restarts we show an iteration count upper bound of $O(κ\log(1/ε))$, where $κ$ is a condition number and $ε$ is the desired accuracy. Moreover, the upper bound is optimal for a wide class of primal-dual methods, and applies to the strictly more general class of sharp primal-dual problems. We develop an adaptive restart scheme and verify that restarts significantly improve the ability of PDHG, EGM, and ADMM to find high accuracy solutions to LP problems.
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð±Ð¸Ð¾ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð¸Ñ ÑÐ¾ÑÐ¾ÑÐ¸Ð½ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¿Ð¸Ð³Ð¼ÐµÐ½ÑÐ¾Ð² Ð¼Ð¸ÐºÑÐ¾Ð²Ð¾Ð´Ð¾ÑÐ¾ÑÐ»ÐµÐ¹ Chlorella Ð¸ Ð¸Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ Ð² ÑÐµÑÐµÐ¿ÑÑÑÐ°Ñ Ð¼ÑÑÐ½ÑÑ Ð¸Ð·Ð´ÐµÐ»Ð¸Ð¹
title: Ð½Ð°ÑÑÐ½ÑÐ¹ Ð´Ð¾ÐºÐ»Ð°Ð´
titleType: Subtitle
title: Development of biotechnology for obtaining photosynthetic pigments of microalgae Chlorella and their application in formulations flour products
Creators: name: Ð¢ÑÑÑÐ¸Ð½Ð°, ÐÐ»ÐµÐ½Ð°
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Ð¸ÑÐµÐ²ÑÐµ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ
chlorella sorokiniana
ÑÐ¾ÑÐ¾ÑÐ¸Ð½ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¸Ð³Ð¼ÐµÐ½ÑÑ
Ð±Ð¸Ð¾ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ñ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð¸Ñ Ð±Ð¸Ð¾Ð¼Ð°ÑÑÑ
Ð¼Ð°ÐºÐ°ÑÐ¾Ð½Ð½ÑÐµ Ð¸Ð·Ð´ÐµÐ»Ð¸Ñ
photosynthetic pigments
biotechnology of biomass production
pasta

description: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÐµÐ¶Ð¸Ð¼Ñ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð½Ð¾Ð³Ð¾ ÐºÑÐ»ÑÑÐ¸Ð²Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¼Ð¸ÐºÑÐ¾Ð²Ð¾Ð´Ð¾ÑÐ¾ÑÐ»ÐµÐ¹ C. sorokiniana Ð² Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½Ð¾Ð¼ ÑÐ¾ÑÐ¾Ð±Ð¸Ð¾ÑÐµÐ°ÐºÑÐ¾ÑÐµ (Ð¤Ð Ð) Ð´Ð»Ñ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð¸Ñ Ð±Ð¸Ð¾Ð¼Ð°ÑÑÑ Ñ Ð²ÑÑÐ¾ÐºÐ¸Ð¼ ÑÐ¾Ð´ÐµÑÐ¶Ð°Ð½Ð¸ÐµÐ¼ ÑÐ¾ÑÐ¾ÑÐ¸Ð½ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¿Ð¸Ð³Ð¼ÐµÐ½ÑÐ¾Ð². ÐÐ¾Ð»ÑÑÐµÐ½Ñ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¹ Ð¿ÑÐ¾ÑÐµÑÑÐ° Ð°Ð²ÑÐ¾ÑÐ»Ð¾ÐºÑÐ»ÑÑÐ¸Ð¸ Ð¸ Ð¾Ð±ÐµÐ·Ð²Ð¾Ð¶Ð¸Ð²Ð°Ð½Ð¸Ñ ÐºÐ»ÐµÑÐ¾ÑÐ½Ð¾Ð¹ ÑÑÑÐ¿ÐµÐ½Ð·Ð¸Ð¸ C. sorokiniana Ð´Ð»Ñ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ Ð²ÑÑ Ð¾Ð´Ð° ÑÑÑ Ð¾Ð¹ Ð±Ð¸Ð¾Ð¼Ð°ÑÑÑ Ñ Ð²ÑÑÐ¾ÐºÐ¸Ð¼ ÑÐ¾Ð´ÐµÑÐ¶Ð°Ð½Ð¸ÐµÐ¼ Ð¿Ð¸Ð³Ð¼ÐµÐ½ÑÐ¾Ð² Ð¸ Ð½Ð¸Ð·ÐºÐ¸Ð¼ ÑÐ¾Ð´ÐµÑÐ¶Ð°Ð½Ð¸ÐµÐ¼ Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾Ð¹ Ð²Ð»Ð°Ð³Ð¸ (Ð´Ð¾ 6%). Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ° Ð¸Ð´ÐµÐ½ÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¸ Ð¸ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° ÑÑÐ°ÐºÑÐ¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ ÑÐ¾ÑÑÐ°Ð²Ð° ÑÐ¾ÑÐ¾ÑÐ¸Ð½ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¿Ð¸Ð³Ð¼ÐµÐ½ÑÐ¾Ð² Ð² Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½Ð¾Ð¹ Ð±Ð¸Ð¾Ð¼Ð°ÑÑÐµ C. sorokiniana Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð¾Ð±ÑÐ°ÑÐµÐ½Ð½Ð¾-ÑÐ°Ð·Ð½Ð¾Ð¹ Ð²ÑÑÐ¾ÐºÐ¾ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¶Ð¸Ð´ÐºÐ¾ÑÑÐ½Ð¾Ð¹ Ñ ÑÐ¾Ð¼Ð°ÑÐ¾Ð³ÑÐ°ÑÐ¸Ð¸.
description: Regimes have been developed for directed cultivation of C. sorokiniana microalgae in a laboratory photobioreactor (PBR) to obtain biomass with a high content of photosynthetic pigments. Results of studies of the process of autoflocculation and dehydration of C. sorokiniana cell suspension to increase the yield of dry biomass with a high content of pigments and a low content of residual moisture ( until 6%). A technique for identification and quantitative analysis of the fractional composition of photosynthetic pigments in the obtained biomass of C. sorokiniana using reversed-phase high-performance liquid chromatography has been developed.
Cancellation properties of graded and nonunital rings. Graded clean and graded exchange Leavitt path algebras
Creators: name: Vas, Lia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16D70, 16U99, 16W50, 16S50, 16S88

description: Various authors have been generalizing some unital ring properties to nonunital rings. We consider properties related to cancellation of modules (being unit-regular, having stable range one, being directly finite, exchange, or clean) and their "local" versions. We explore their relationships and extend the defined concepts to graded rings. With graded clean and graded exchange rings suitably defined, we study how these properties behave under the formation of graded matrix rings. We exhibit properties of a graph $E$ which are equivalent to the unital Leavitt path algebra $L_K(E)$ being graded clean. We also exhibit some graph properties which are necessary and some which are sufficient for $L_K(E)$ to be graded exchange.
description: This version contains some modifications based on the input from a referee for the Journal of Algebra and its Applications
On the Response of an OST to a Point-like Heat Source
Creators: name: Quadt, A.
name: Schröder, B.
name: Uhrmacher, M.
name: Weingarten, J.
name: Willenberg, B.
name: Vennekate, H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A new technique of superconducting cavity diagnostics has been introduced by D. Hartrill at Cornell University, Ithaca, USA. Oscillating Superleak Transducers (OST) detect the heat transferred from a cavity's quench point via "Second Sound" through the superfluid He bath, needed to cool the superconducting cavity. The observed response of an OST is a complex, but reproducible pattern of oscillations. A small helium evaporation cryostat was built which allows the investigation of the response of an OST in greater detail. The distance between a point-like electrical heater and the OST can be varied. The OST can be mounted either parallel or perpendicular to the plate, housing the heat source. If the artificial quench-point releases an amount of energy compatible to a real quench spot on a cavity's surface, the OST signal starts with a negative pulse, which is usually strong enough to allow automatic detection. Furthermore, the reflection of the Second Sound on the wall is observed. A reflection coefficient R = 0.39 +- 0.05 of the glass wall is measured. This excludes a strong influence of multiple reflections in the complex OST response. Fourier analyses show three main frequencies, found in all OST spectra. They can be interpreted as modes of an oscillating circular membrane.
description: 10 pages, 16 figures
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð²ÑÑÑÐ°Ð¸Ð²Ð°ÐµÐ¼ÑÑ ÑÐ¸ÑÑÐµÐ¼ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ ÑÐ¾Ð±Ð¾ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ð¼Ð¸ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð°Ð¼Ð¸ Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸ÐµÐ¼ ÐºÐ¾Ð¼Ð¿ÑÑÑÐµÑÐ½ÑÑ Ð¼Ð¾Ð´ÐµÐ»ÐµÐ¹ Ð¸ÑÐ¿Ð¾Ð»Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÑ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð²
title: Ð½Ð°ÑÑÐ½ÑÐ¹ Ð´Ð¾ÐºÐ»Ð°Ð´
titleType: Subtitle
title: Embedded control systems development for robotic devices using computer models of actuators
Creators: name: Ð¡Ð°Ð¼Ð°ÑÐ¸Ð½, ÐÐ°ÑÐ¸Ð»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: 2020
Subjects: ÑÐ¾Ð±Ð¾ÑÐ¾ÑÐµÑ Ð½Ð¸ÐºÐ°
Ð²ÑÑÑÐ°Ð¸Ð²Ð°ÐµÐ¼ÑÐµ ÑÐ¸ÑÑÐµÐ¼Ñ
Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
ÑÐ¸ÑÑÐ¾Ð²Ð¾Ð¹ Ð´Ð²Ð¾Ð¹Ð½Ð¸Ðº
robotics
embedded systems
simulation
digital twin

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿Ð¾Ð´Ñ Ð¾Ð´Ð¾Ð², Ð¿ÑÐ¸Ð¼ÐµÐ½ÑÐµÐ¼ÑÑ Ð² ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÑ Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÑ ÑÑÐµÐ´ÑÑÐ²Ð°Ñ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¾Ð±Ð¾ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÐµ Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÑ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÑÐ¸ÑÑÐµÐ¼ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¾Ð±Ð¾ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼. ÐÑÐ´ÐµÐ»ÐµÐ½Ñ ÑÐ¸Ð¿Ð¾Ð²ÑÐµ ÑÑÑÑÐºÑÑÑÑ ÑÐ°ÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼. Ð Ð°Ð·Ð²Ð¸ÑÐ° ÐºÐ¾Ð½ÑÐµÐ¿ÑÐ¸Ñ Â«ÑÐ¸ÑÑÐ¾Ð²ÑÑ Ð´Ð²Ð¾Ð¹Ð½Ð¸ÐºÐ¾Ð²Â» Ð¿ÑÐ¸Ð¼ÐµÐ½Ð¸ÑÐµÐ»ÑÐ½Ð¾ Ðº Ð·Ð°Ð´Ð°ÑÐ°Ð¼ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¾Ð±Ð¾ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼, Ð¸Ñ ÑÐ·Ð»Ð¾Ð², Ð° ÑÐ°ÐºÐ¶Ðµ Ð²ÑÑÑÐ°Ð¸Ð²Ð°ÐµÐ¼ÑÑ ÑÑÐµÐ´ÑÑÐ² Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ ÑÐµÑ Ð½Ð¸ÐºÐ¸ Ð´Ð»Ñ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸Ð¼Ð¸. ÐÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ñ ÑÑÑÑÐºÑÑÑÐ½Ð¾-ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½ÑÐµ ÑÑ ÐµÐ¼Ñ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÐ¸ÑÑÐµÐ¼ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸ÑÐ¿Ð¾Ð»Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÐ¼Ð¸ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð°Ð¼Ð¸ ÑÐ¾Ð±Ð¾ÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼. ÐÐ¿Ð¸ÑÐ°Ð½ Ð¿ÑÐ¾ÑÐµÑÑ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸ Ð°Ð¿ÑÐ¾Ð±Ð°ÑÐ¸Ð¸ Ð¿Ð¾Ð´Ñ Ð¾Ð´Ð° Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¸Ð·Ð¸ÑÑÐµÐ¼Ð¾Ð¹ Ð¼Ð¾Ð´ÐµÐ»Ð¸ ÐºÐ¾Ð»ÐµÑÐ½Ð¾Ð³Ð¾ ÑÐ¾Ð±Ð¾ÑÐ°, Ð¿ÑÐ¸Ð³Ð¾Ð´Ð½Ð¾Ð¹ Ðº Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð² ÐºÐ°ÑÐµÑÑÐ²Ðµ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ° Ð±Ð¸Ð±Ð»Ð¸Ð¾ÑÐµÐºÐ¸ ÑÐ·Ð»Ð¾Ð² Ð¸ ÑÐ¸ÑÑÐµÐ¼ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ.
description: This paper describes the approaches used in modern tools for robotic systems design. Considered The modern control systems development tools and simulation of robotic systems. highlighted typical structures of such systems. Developed concept of "digital twins" in relation to robotic systems design, their units, as well as embedded systems. Proposed structural and functional schemes of robotic control systems organization. Described implementation and testing wheeled robot parameterized model, as an element of an units and control systems library.
The Queen's Guard: A Secure Enforcement of Fine-grained Access Control In Distributed Data Analytics Platforms
Creators: name: Shaon, Fahad
name: Rahaman, Sazzadur
name: Kantarcioglu, Murat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Distributed data analytics platforms (i.e., Apache Spark, Hadoop) provide high-level APIs to programmatically write analytics tasks that are run distributedly in multiple computing nodes. The design of these frameworks was primarily motivated by performance and usability. Thus, the security takes a back seat. Consequently, they do not inherently support fine-grained access control or offer any plugin mechanism to enable it, making them risky to be used in multi-tier organizational settings. There have been attempts to build "add-on" solutions to enable fine-grained access control for distributed data analytics platforms. In this paper, first, we show that straightforward enforcement of ``add-on'' access control is insecure under adversarial code execution. Specifically, we show that an attacker can abuse platform-provided APIs to evade access controls without leaving any traces. Second, we designed a two-layered (i.e., proactive and reactive) defense system to protect against API abuses. On submission of a user code, our proactive security layer statically screens it to find potential attack signatures prior to its execution. The reactive security layer employs code instrumentation-based runtime checks and sandboxed execution to throttle any exploits at runtime. Next, we propose a new fine-grained access control framework with an enhanced policy language that supports map and filter primitives. Finally, we build a system named SecureDL with our new access control framework and defense system on top of Apache Spark, which ensures secure access control policy enforcement under adversaries capable of executing code. To the best of our knowledge, this is the first fine-grained attribute-based access control framework for distributed data analytics platforms that is secure against platform API abuse attacks. Performance evaluation showed that the overhead due to added security is low.
Photon-mediated interactions near a Dirac photonic crystal slab
Creators: name: Navarro-Barón, Erik P.
name: Vinck-Posada, Herbert
name: González-Tudela, Alejandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Dirac energy-dispersions are responsible of the extraordinary transport properties of graphene. This motivated the quest for engineering such energy dispersions also in photonics, where they have been predicted to lead to many exciting phenomena. One paradigmatic example is the possibility of obtaining power-law, decoherence-free, photon-mediated interactions between quantum emitters when they interact with such photonic baths. This prediction, however, has been obtained either by using toy-model baths, which neglect polarization effects, or by restricting the emitter position to high-symmetry points of the unit cell in the case of realistic structures. Here, we develop a semi-analytical theory of dipole radiation near photonic Dirac points in realistic structures that allows us to compute the effective photon-mediated interactions along the whole unit cell. Using this theory, we are able to find the positions that maximize the emitter interactions and their range, finding a trade-off between them. Besides, using the polarization degree of freedom, we also find positions where the nature of the collective interactions change from being coherent to dissipative ones. Thus, our results significantly improve the knowledge of Dirac light-matter interfaces, and can serve as a guidance for future experimental designs.
description: 12 figures, 19 pages
Additional file 13 of Stop codon readthrough alters the activity of a POU/Oct transcription factor during Drosophila development
Creators: name: Zhao, Yunpo
name: Lindberg, Bo Gustav
name: Esfahani, Shiva Seyedoleslami
name: Tang, Xiongzhuo
name: Piazza, Stefano
name: Engström, Ylva
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 13. Code used in RNA-seq analysis.
Reservoir Characterization of the uppermost Monteith Formation -Tight Gas Sandstones in the Western Canada Sedimentary Basin in Alberta, Canada.
Creators: name: ZAMBRANO, LILIANA
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Engineering--Petroleum
subject: Geology
subject: reservoir characterization
subject: Monteith Formation
subject: low-permeability siliciclastic reservoirs
subject: Deep Basin of Alberta
subject: Rock types
subject: Unconventional tight gas reservoirs
subject: GFREE team
subject: fluvial-dominated deposits
subject: cores and drill cutting samples

description: This thesis is focused on characterization of reservoir properties of the Monteith A unit in the Deep Basin of Alberta, based on cores, drill cuttings and well logs. Knowledge of key geologic parameters obtained from this study provides an understanding of relationships between lithofacies, mineralogy, diagenetic overprinting, and distribution of rock properties in this gas-bearing interval. The approach followed in this thesis requires identification, and comparison of three major rock types at different scales: (a) depositional rock type, (b) petrographic rock type, and (c) hydraulic rock type. These are complementary components for the definition of reservoir quality in low-permeability sandstone reservoirs. Direct and indirect sources of information provided the data for performing an integrated geological analysis. Well cores and drill cuttings available from this stratigraphic unit were described in order to define the sedimentary facies and structural features. In addition, the samples were used to define reservoir properties of the rocks through laboratory measurements of core porosity and permeability. In the case of drill cuttings, permeability measurements were performed in a laboratory at the University of Calgary. Drill cuttings were also used in the laboratory for determining porosity. All data were combined with available gas production data to establish the main geological parameters controlling gas production, and to provide a partial explanation of the heterogeneity observed in historical well productivity. The combined information was also used to gain some preliminary insights into the effect of rock quality on flowback time from hydraulic fracturing jobs. The results provide important feedback for future hydrocarbon exploration and will have a significant impact on the development of existing Monteith tight-gas fields. Furthermore, it is anticipated that the workflow presented in this thesis will improve our understanding of other similarly underexploited unconventional reservoirs. This work establishes the presence of significant gas potential in the Monteith A unit. This potential can be exploited by taking into account the stratigraphic geometry, sedimentological facies, mineralogy and pore systems described in this thesis. These are major geologic factors affecting reservoir properties, and consequently influencing and controlling gas production.
Spatial and Temporal Evolution of Snow Cover on Landfast First-Year Sea Ice
Creators: name: Peters, Melissa Marie
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences
subject: Physical Geography
subject: Physical Oceanography
subject: Snow
subject: sea
subject: Ice
subject: Spatial
subject: temporal
subject: Statistics
subject: FOS: Mathematics
subject: semivariogram
subject: kriging
subject: Arctic
subject: Hudson
subject: Bay
subject: landfast
subject: coast

description: In this thesis, the spatial distribution and temporal evolution of snow depth over sub-Arctic landfast first-year sea ice in Hudson Bay, having smooth and rough microscale surface texture forms, was characterized and modeled for the late winter-to-early spring transition period prior to sea ice melt. Quantitative and qualitative in situ meteorological, snow depth, and sea ice surface roughness data were acquired and analyzed with descriptive and nonparametric statistics, bivariate linear regression, h-scatterplots, experimental omnidirectional semivariograms, and kriging. Snow cover was characterized as complexly layered. Thin/thick snow was observed over smooth/rough microscale sea ice surfaces, but were not directly correlated. Snow depth was highly variable over spatial and temporal scales, as were spatial autocorrelation decay distances. Snow depth predictions through semivariogram and kriging models were accurate for areas exhibiting gradual snow thickness fluctuations and that were densely sampled. Suggestions for future snow depth modeling were presented.
Exciton-photon complexes and dynamics in the concurrent strong-weak coupling regime of singular site-controlled cavity quantum electrodynamics
Creators: name: Huang, Jiahui
name: Liu, Wei
name: Sarihan, Murat Can
name: Cheng, Xiang
name: Miranda, Alessio
name: Dwir, Benjamin
name: Rudra, Alok
name: Kapon, Eli
name: Wong, Chee Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the exciton complexes photoluminescence, dynamics and photon statistics in the concurrent strong weak coupling regime in our unique site controlled singular inverted pyramidal InGaAs/GaAs quantum dots photonic crystal cavities platform. Different from a clear boundary between strong and weak QD cavity coupling, we demonstrate the strong and weak coupling can coexist dynamically, as a form of intermediate regime mediated by phonon scattering. The detuning dependent microphotoluminescence spectrum reveals concurrence of exciton cavity polariton mode avoided crossing, as a signature of Rabi doublet of the strong coupled system, the blue shifting of coupled exciton cavity mode energy near zero detuning ascribed to the formation of collective states mediated by phonon assisted coupling, and their partial out of synchronization linewidth narrowing linked to their mixed behavior. By detailing the optical features of strongly confined exciton-photon complexes and the quantum statistics of coupled cavity photons, we reveal the dynamics and antibunching/bunching photon statistical signatures of the concurrent strong weak intermediate coupled system at near zero-detuning. This study suggests our device has potential for new and subtle cavity quantum electrodynamical phenomena, cavity enhanced indistinguishable single photon generation, and cluster state generation via the exciton-photon complexes for quantum networks.
A new method for characterizing spindle radial error motion : a two-dimensional point of view
Creators: name: Jamalian, Arash
Publisher: name: University of British Columbia
Year: 2010

description: This thesis presents a new two dimensional (2D) method based on complex Fourier series to characterize spindle radial error motions. One subtlety of spindle metrology is that the radial motion measurements have an undesired component caused by the ball installation eccentricity. The current standard methods cannot distinguish between this undesired component and fundamental radial error motion of spindle. The new 2D method identifies what fundamental radial error motion is and how it can be distinguished from the test ball installation eccentricity. Current standard methods give the consequence of radial error motion in two classes of spindle applications, but not the radial error motion itself. By identifying the fundamental radial error motion, the 2D method can not only determine the axis of rotation radial error motion, but also the consequence of error motion in all classes of spindle applications, including a new class of applications with two radial sensitive directions. Experiments are carried out on two types of spindles to confirm that fundamental radial error motion not only exists but it can have a magnitude higher than any other error motion component. The 2D method is used to find the actual radial error motion of the spindles as well as the consequence of error motion in applications. Possible physical causes of the fundamental error motion are also discussed and experiments are carried out to identify their actual effect on the spindles under test.
The Mid-Infrared Environments of High-Redshift Radio Galaxies
Creators: name: Galametz, Audrey
name: Stern, Daniel
name: De Breuck, Carlos
name: Hatch, Nina
name: Mayo, Jack
name: Miley, George
name: Rettura, Alessandro
name: Seymour, Nick
name: Stanford, S. Adam
name: Vernet, Joel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Taking advantage of the impressive sensitivity of Spitzer to detect massive galaxies at high redshift, we study the mid-infrared environments of powerful, high-redshift radio galaxies at 1.2-0.1 (AB), in the fields of 48 radio galaxies at 1.21.2. Using a counts-in-cell analysis, we identify a field as overdense when 15 or more red IRAC sources are found within 1arcmin (i.e.,~0.5Mpc at 1.21.2.
description: 14 pages, 7 figures, 3 tables, accepted for publication in ApJ
Additional file 14 of Stop codon readthrough alters the activity of a POU/Oct transcription factor during Drosophila development
Creators: name: Zhao, Yunpo
name: Lindberg, Bo Gustav
name: Esfahani, Shiva Seyedoleslami
name: Tang, Xiongzhuo
name: Piazza, Stefano
name: Engström, Ylva
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 14. Original immunoblots Fig. 1.
Additional file 15 of Stop codon readthrough alters the activity of a POU/Oct transcription factor during Drosophila development
Creators: name: Zhao, Yunpo
name: Lindberg, Bo Gustav
name: Esfahani, Shiva Seyedoleslami
name: Tang, Xiongzhuo
name: Piazza, Stefano
name: Engström, Ylva
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 15. Original immunoblots Fig. 3.
Solution Based Synthesis of Copper Nanowire/Polymer Composites and Their Electrical Properties
Creators: name: Li, Yan
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Chemical
subject: copper nanowire
subject: Polymer
subject: composite

description: Conductive polymer composites (CPCs) are intensively researched partly because of their advantages in acting as conductive materials while maintaining polymers’ properties such as easy processability, corrosion resistance and light weight. This thesis focuses on using copper nanowires (CuNW) as filler, with different polymers as matrices, in order to study the influence of filler loading, the interaction between filler and matrix on the electrical properties and the electromagnetic interference shielding properties of the composites. CPCs with CuNW as filler and different polymers as matrices were successfully prepared using miscible solution mixing and precipitation method. Among these composites, copper nanowire/polypropylene (CuNW/PP) composite is investigated primarily and compared with carbon nanotube/polypropylene composite. The conductivity curve of CuNW/PP composite shows a different trend than typical percolation, where a plateau was found around CuNW concentration between 0.8 vol. % and 1.7 vol. %. Further study regarding synthesis of CuNW is also reported.
COMPARATIVE ANALYSIS OF THE ROLE OF "FATHER" IN THE FAMILIES IN UZBEK AND ENGLISH FICTION
Creators: name: Nurullayeva, Fazilatxan
Publisher: name: Zenodo
Year: 2023

description: In Uzbek culture, the father is often seen as the head of the family and the primary provider for the household. He is expected to be the authority figure and decision-maker, and his role is often defined by traditional gender roles and expectations. In Uzbek literature, fathers are often portrayed as strong, protective figures who are respected and revered by their children.
Additional file 16 of Stop codon readthrough alters the activity of a POU/Oct transcription factor during Drosophila development
Creators: name: Zhao, Yunpo
name: Lindberg, Bo Gustav
name: Esfahani, Shiva Seyedoleslami
name: Tang, Xiongzhuo
name: Piazza, Stefano
name: Engström, Ylva
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 16. Original immunoblots Fig. 4.
A modular U-Net for automated segmentation of X-ray tomography images in composite materials
Creators: name: Bertoldo, João P C
name: Decencière, Etienne
name: Ryckelynck, David
name: Proudhon, Henry
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: I.4.6; I.2.10; I.5.4; J.2
subject: 68T07 (Primary) 68T45 (Secondary)

description: X-ray Computed Tomography (XCT) techniques have evolved to a point that high-resolution data can be acquired so fast that classic segmentation methods are prohibitively cumbersome, demanding automated data pipelines capable of dealing with non-trivial 3D images. Deep learning has demonstrated success in many image processing tasks, including material science applications, showing a promising alternative for a humanfree segmentation pipeline. In this paper a modular interpretation of UNet (Modular U-Net) is proposed and trained to segment 3D tomography images of a three-phased glass fiber-reinforced Polyamide 66. We compare 2D and 3D versions of our model, finding that the former is slightly better than the latter. We observe that human-comparable results can be achievied even with only 10 annotated layers and using a shallow U-Net yields better results than a deeper one. As a consequence, Neural Network (NN) show indeed a promising venue to automate XCT data processing pipelines needing no human, adhoc intervention.
Approach to ease design criteria of a real-time model used in a VR training system considering constraints of human perception
Creators: name: Widmer, Antoine
Publisher: name: Graduate Studies
Year: 2012
Subjects: subject: Engineering--Electronics and Electrical
subject: Virtual Reality
subject: Haptic feedback
subject: Human perception

description: Virtual reality (VR) systems have potential of contributing to the training of medical students in a variety of procedures. This thesis focuses on a design issue related to developing VR training systems for soft tissue (e.g., breast phantom) palpation. In such a VR system, it is paramount to provide a real-time model that simulates physical behavior of an actual breast phantom. However, it is difficult to design such a real-time model with high accuracy due to time and physical constraints. To mitigate this difficulty, I consider constraints of human perception which is insensitive to small discrepancies of objects during real-time interaction. Such consideration could aid to relax design criteria of the real-time model by achieving its accuracy at a certain degree while keeping human perception of object softness unchanged. Therefore, I take a two-step approach to determine visual and haptic (pertinent to force feedback) discrepancies tolerable for this human perception. In the first step, an evaluation method is developed to compute discrepancies of the real-time model for visual displacement and force feedback, compared to its finite element method counterpart featuring physical parameters of a breast phantom. The computation uses statistical analyses which like human perception are insensitive to small discrepancies of datasets. In the second step, two studies are performed to examine the constraints of human perception. The first study reexamined raw data from my MSc work to understand the effect of three popular alignments between a visual display and a haptic device on the human perception of object softness. This study serves to select an alignment producing the least perceptual illusion and physical workload for palpation. Using the evaluation method and the selected alignment, the second study investigates the effect of different discrepancies on the human perception of object softness. It is observed that this perception is insensitive to small discrepancies up to a threshold of 11.0% and 6.3% for visual displacement and force feedback, respectively. This indicates that a real-time model yielding discrepancies of visual displacement and force feedback below their respective thresholds could be sufficient for simulating a soft tissue (such as a breast phantom) during palpation.
Probing a non-biaxial behavior of infinitely thin hard platelets
Creators: name: Nomura, Hitomi
name: Koda, Tomonori
name: Nishioka, Akihiro
name: Okumura, Hisashi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We give a criterion to test a non-biaxial behavior of infinitely thin hard platelets of $D_{2h}$ symmetry based upon the components of three order parameter tensors. We investigated the nematic behavior of monodisperse infinitely thin rectangular hard platelet systems by using the criterion. Starting with a square platelet system, and we compared it with rectangular platelet systems of various aspect ratios. For each system, we performed equilibration runs by using isobaric Monte Carlo simulations. Each system did not show a biaxial nematic behavior but a uniaxial nematic one, despite of the shape anisotropy of those platelets. The relationship between effective diameters by simulations and theoretical effective diameters of the above systems was also determined.
description: Submitted to JPSJ
The yield of gasoline range hydrocarbons from plastic waste pyrolysis
Creators: name: Hussein, Zahraa A.
name: Shakor, Zaidoon M.
name: Alzuhairi, Mohammed
name: Al-Sheikh, Farooq
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Science Policy

description: Plastic waste has become a serious issue that causes environmental contamination because of not degrading naturally and neglecting in the landfills over the years. Therefore, this paper deals with the experimental investigation of thermal and catalytic cracking using various types of plastics including high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET) in a stainless-steel semi-batch reactor under nitrogen atmosphere at the temperatures ranging from 350 to 500°C and by varying the residence times (60, 90, and 120 min). In the catalytic cracking, the experiments were run by varying the catalyst to polymer ratios (5, 10, and 15 wt%), as well as a catalyst bed has been designed for catalytic cracking experiments. The produced liquid was analyzed using Gas Chromatography-Mass Spectroscopy (GC-MS) which revealed that the liquid produced contained mainly aromatic and paraffinic hydrocarbons that can be used as fuel. According to the experimental results, the highest liquid yield obtained from thermal cracking was 92.4 wt% using PS as feedstock at 500°C and 120 min, while the highest liquid yield obtained from catalytic cracking was 90.45 wt% using LDPE as feedstock and 5 wt% of the Ketjenfine PR.9 catalyst at 500°C and 90 min. Therefore, Ketjenfine PR.9 was found to be appropriate as a catalyst for the degradation of plastics.
Subrepresentations in the homology of finite covers of graphs
Creators: name: Flamm, Xenia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 57M10, 57M60, 20C15

description: Let $p \colon Y \to X$ be a finite, regular cover of finite graphs with associated deck group $G$, and consider the first homology $H_1(Y;\mathbb{C})$ of the cover as a $G$-representation. The main contribution of this article is to broaden the correspondence and dictionary between the representation theory of the deck group $G$ on the one hand, and topological properties of homology classes in $H_1(Y;\mathbb{C})$ on the other hand. We do so by studying certain subrepresentations in the $G$-representation $H_1(Y;\mathbb{C})$. The homology class of a lift of a primitive element in $π_1(X)$ spans an induced subrepresentation in $H_1(Y;\mathbb{C})$, and we show that this property is never sufficient to characterize such homology classes if $G$ is Abelian. We study $H_1^{\textrm{comm}}(Y;\mathbb{C}) \leq H_1(Y;\mathbb{C})$ -- the subrepresentation spanned by homology classes of lifts of commutators of primitive elements in $π_1(X)$. Concretely, we prove that the span of such a homology class is isomorphic to the quotient of two induced representations. Furthermore, we construct examples of finite covers with $H_1^{\textrm{comm}}(Y;\mathbb{C}) \neq \ker(p_*)$.
description: 14 pages. Comments welcome! Second version: Minor corrections and implementation of referee's recommendations (a proof of Corollary 2.5 (former Corollary 2.4) and an explanation of Example 4.1 were added), accepted for publication by Glasgow Mathematical Journal
Development of an Integrated Life Cycle Framework to Evaluate Emerging Carbon Capture Technologies: An Albertan Case Study
Creators: name: Ceh, Matthew
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Energy
subject: Engineering--Environmental
subject: Engineering--Mechanical
subject: Carbon Capture
subject: Electricity
subject: Uncertainty

description: The critical evaluation of emerging carbon capture and storage (CCS) technologies is essential to facilitate successful deployment. CCS offers much promise in reducing the carbon footprint of electricity production, but there are significant cost and energy penalties associated. Evaluation is complicated by the fact that unique variability and uncertainty are introduced when evaluating prior to commercialization. In this thesis, an evaluation of an advanced carbon capture technology is conducted using a developed framework based on life cycle assessment, energy system modeling, and life cycle costing. The developed framework can be used to inform the benchmarking of CCS technologies. The results take into account the significant upstream impacts from the additional extraction and transport of input fuel required to compensate for CCS implementation. The development and application of this integrated life cycle-based tool, will inform current CCS R&D activities and provide better information to energy policy and investment decision makers.
The "Rothko Chapel" - Morton Feldman - Mark Rothko
Creators: name: Peter Oberosler
Publisher: name: Zenodo
Year: 2023

description: Term paper for the Seminar: Musikhistorisches Seminar: Bildbezogenes Komponieren at University Innsbruck / Musicology / WS 2011/12;
Instructor: Prof. Dr. Monika Fink-Naumann / Speaker: Peter Oberosler;
Topic: intermediality / Morton Feldman / Mark Rothko
Broad Observational Perspectives Achieved by the Accreting White Dwarf Sciences in the XMM-Newton and Chandra Eras
Creators: name: Balman, Solen
name: Orio, Marina
name: Luna, Gerardo J. M.
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Accreting white dwarf binaries (AWDs) comprise cataclysmic variables (CVs), symbiotics, AM CVns, and other related systems that host a primary white dwarf (WD) accreting from a main sequence or evolved companion star. AWDs are a product of close binary evolution; thus, they are important for understanding the evolution and population of X-ray binaries in the Milky Way and other galaxies. AWDs are essential for studying astrophysical plasmas under different conditions along with accretion physics and processes, transient events, matter ejection and outflows, compact binary evolution, mergers, angular momentum loss mechanisms, and nuclear processes leading to explosions. AWDs are also closely related to other objects in the late stages of stellar evolution, with other accreting objects in compact binaries, and even share common phenomena with young stellar objects, active galactic nuclei, quasars, and supernova remnants. As X-ray astronomy came to a climax with the start of the Chandra and XMM-Newton missions owing to their unprecedented instrumentation, new excellent imaging capabilities, good time resolution, and X-ray grating technologies allowed immense advancement in many aspects of astronomy and astrophysics. In this review, we lay out a panorama of developments on the study of AWDs that have been accomplished and have been made possible by these two observatories; we summarize the key observational achievements and the challenges ahead.
description: 60 pages, 20 Figures, Review Paper published in the journal "Universe" as part of the Special Issue "X-ray Astronomy Steps into the 21st Century: Chandra and XMM-Newton at 25"
Molecules in supernova ejecta
Creators: name: Cherchneff, Isabelle
name: Sarangi, Arkaprabha
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The first molecules detected at infrared wavelengths in the ejecta of a Type II supernova, namely SN1987A, consisted of CO and SiO. Since then, confirmation of the formation of these two species in several other supernovae a few hundred days after explosion has been obtained. However, supernova environments appear to hamper the synthesis of large, complex species due to the lack of microscopically-mixed hydrogen deep in supernova cores. Because these environments also form carbon and silicate dust, it is of importance to understand the role played by molecules in the depletion of elements and how chemical species get incorporated into dust grains. In the present paper, we review our current knowledge of the molecular component of supernova ejecta, and present new trends and results on the synthesis of molecules in these harsh, explosive events.
description: 9 pages, 3 figures, to appear in the proceedings of IAU Symposium 280: "The Molecular Universe"
Developing Open Source Educational Resources for Machine Learning and Data Science
Creators: name: Bothmann, Ludwig
name: Strickroth, Sven
name: Casalicchio, Giuseppe
name: Rügamer, David
name: Lindauer, Marius
name: Scheipl, Fabian
name: Bischl, Bernd
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Education should not be a privilege but a common good. It should be openly accessible to everyone, with as few barriers as possible; even more so for key technologies such as Machine Learning (ML) and Data Science (DS). Open Educational Resources (OER) are a crucial factor for greater educational equity. In this paper, we describe the specific requirements for OER in ML and DS and argue that it is especially important for these fields to make source files publicly available, leading to Open Source Educational Resources (OSER). We present our view on the collaborative development of OSER, the challenges this poses, and first steps towards their solutions. We outline how OSER can be used for blended learning scenarios and share our experiences in university education. Finally, we discuss additional challenges such as credit assignment or granting certificates.
description: 6 pages
Relationship Between Design Goodness Attributes and Drivers to Overall Design Perceptions
Creators: name: Zhao, Lei
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Industrial
subject: Engineering--Mechanical
subject: Good Engineering Design
subject: Design Attributes
subject: Non-Product Specific Guidance

description: Engineering design is critical to corporate success and societal progress. The economic success of most firms depends on designing products to satisfy the needs and wants of their customers. Products are usually designed with a target customer group in mind. However, what product designers need is a priori guidance on good design that is best if it can be generalized to non-product specific guidelines. Recent research has determined fifteen design attributes that can be considered of primary interest to good design, regardless what kind of the product is. Determining the different importance of these attributes is the main focus of this research. Subfactors that are hypothesized as drivers to higher order customer product needs are given. By assessing people’s opinions on the importance of design attributes and subfactors, a model which determines the relative importance of design attributes in contributing to good design is developed to provide non-product specific guidance.
Thermally-reconfigurable metalens
Creators: name: Archetti, Anna
name: Lin, Ren-Jie
name: Restori, Nathanaël
name: Kiani, Fatemeh
name: Tsoulos, Ted V.
name: Tagliabue, Giulia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Thanks to the compact design and multi-functional light-manipulation capabilities, reconfigurable metalenses, which consist of arrays of sub-wavelength meta-atoms, offer unique opportunities for advanced optical systems, from microscopy to augmented reality platforms. Although poorly explored in the context of reconfigurable metalens, thermo-optical effects in resonant silicon nanoresonators have recently emerged as a viable strategy to realize tunable meta-atoms. In this work, we report the proof-of-concept design of an ultrathin (300 nm thick) and thermo-optically reconfigurable silicon metalens operating at a fixed, visible wavelength (632 nm). Importantly, we demonstrate continuous, linear modulation of the focal-length up to 21% (from 165 $μ$m at 20$°$C to 135 $μ$m at 260$°$C). Operating under right-circularly polarized light, our metalens exhibits an average conversion efficiency of 26%, close to mechanically modulated devices, and has a diffraction-limited performance. Overall, we envision that, combined with machine-learning algorithms for further optimization of the meta-atoms, thermally-reconfigurable metalenses with improved performance will be possible. Also, the generality of this approach could offer inspiration for the realization of active metasurfaces with other emerging material within field of thermo-nanophotonics.