cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Dynamics of a frictional system, accounting for hereditary-type friction and the mobility of the vibration limiter
Creators: name: Igumnov, Leonid A.
name: Metrikin, Vladimir S.
name: Grigoryev, Mikhail V.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: Dynamics of a frictional system consisting of a rough body situated on a rough belt
moving at a constant velocity is studied. The vibrations are limited by an elastic obstacle. The
Coulomb-Hammonton dry friction characteristic is chosen, according to the hypothesis of
Ishlinskiy and Kragelskiy, in the form of hereditary-type friction, where the coefficient of
friction of relative rest (CFRR) is a monotone non-decreasing continuous functionof the time
of relative rest at the previous analogous time interval. A mathematical model and the
structure of its phase space are presented, as well as the equations of point maps of the
Poincare surface and the results of studying the dynamic characteristics of the parameters of
the system (velocity of the belt, type of the functional relation of CFRR, rigidity of the elastic
obstacle, etc.). A software product has been developed which makes it possible to find
complex periodic motion regimes, as well as to calculate bifurcation diagrams used for
determining the main variations of the motion regime from periodic to chaotic (the period
doubling scenario).
Beyond the Unnameable
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Mix, bullshitting with and without callers, True Love Comics, phone calls; Sing Along with God ; Live music of Kip Sullivan (vocals), John Lewis (piano, but not same as John Lewis of Modern Jazz Quartet), Tom Yulberg (Eulberg? Yalberg?). Call about unemployment unfairness
Future PHENIX Data Analyses 2021-23
Creators: name: Drees, Axel
Publisher: name: Zenodo
Year: 2021
Subjects: rhic
phenix
heavy flavor
qgp
small systems
sphenix
charmonium
au+au
d+au
3he+au
p+au
direct photon
thermal photon
school21

description: A summary of analysis plans in PHENIX. Presented at the PHENIX School in 2021.
Exoplanet Predictions Based on the Generalised Titius-Bode Relation
Creators: name: Bovaird, Timothy
name: Lineweaver, Charles H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We evaluate the extent to which newly detected exoplanetary systems containing at least four planets adhere to a generalized Titius-Bode (TB) relation. We find that the majority of exoplanet systems in our sample adhere to the TB relation to a greater extent than the Solar System does, particularly those detected by the Kepler mission. We use a generalized TB relation to make a list of predictions for the existence of 141 additional exoplanets in 68 multiple-exoplanet systems: 73 candidates from interpolation, 68 candidates from extrapolation. We predict the existence of a low-radius (R < 2.5 Earth Radii) exoplanet within the habitable zone of KOI-812 and that the average number of planets in the habitable zone of a star is 1-2. The usefulness of the TB relation and its validation as a tool for predicting planets will be partially tested by upcoming Kepler data releases.
description: 23 pages, 7 figures, 3 tables Accepted by MNRAS
Experimental Analysis of Recirculating Lubrication and Oil Bath Lubrication on Tapered Roller Bearings
Creators: name: Manjunath, Manjunath
name: Ost, Wouter
name: De Baets, Patrick
name: Fauconnier, Dieter
Publisher: name: Zenodo
Year: 2022

description: To provide improved recommendations for selecting an adequate lubrication method for tapered roller bearings (TRB’s), detailed measurements of global friction torque and temperature distribution in TRB’s are performed as function of different speed and loads. Moreover, different lubrication methods are investigated, considering different oil quantities in the bearing housing. The experimental data are compared with two existing frictional models, i.e., Harris and SKF models, and their range of applicability is also assessed. In this work an in-house bearing test setup, is used to simulate different operating conditions (speed and load). The bearing temperature is measured using thermocouples mounted on an outer stationary raceway, whereas the friction force is measured by a load cell .
Josh White
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Blues musicians

description: Fass plays Irish and green-themed music in honor of Saint Patrick's Day: "Wild Colonial Boy," the Irish National Anthem, Irish folk music, and "It's Not Time Now" by the Lovin' Spoonful, and others. Josh White, guest, discusses his career and performs live.
title: On wave field formation on the surface of piezoactive bodies with inhomogeneous coating
Creators: name: Andzhikovich, I.E.
name: Belyankova, T.I.
name: Kalinchuk,  V.V.
name: Levi, G.Yu.
name: Levi, M.O.
name: Lyzhov, V.A.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: Within the framework of a model for the piezoelectric structure with a coating
made of a functionally graded material with a piecewise-continuous variation of properties,
the problem of propagation of horizontally polarized shear surface waves was investigated.
The influence of the polarization vector orientation and the nature of the coating
inhomogeneity on the propagation of surface waves in an "acoustically homogeneous"
structure was studied.
Felix Kreusch, Über Pfalzkapelle und Atrium zur Zeit Karls des Großen
Creators: name: Quadflieg, Eberhard
Publisher: name: Aachener Kunstblätter
Year: 2017

description: Rezension zu:

Felix Kreusch. Über Pfalzkapelle und Atrium zur Zeit Karls des Großen. (Dom zu Aachen. Beiträge zur Baugeschichte IV.) Aachen 1958. (Druck: Wilhelm Metz, Aachen.) 124 S., 38 Abb.
description: Aachener Kunstblätter, Bd. 17-18 (1958-1959): Aachener Kunstblätter
Transition metal complexes of α-aminophosphonates part II: Synthesis, spectroscopic characterization, and in vitro anticancer activity of copper(II) complexes of α-aminophosphonates
Creators: name: Azzam, Mariam Ahmed
name: El-Boraey, Hanaa Abdel Latif
name: El-Sayed, Ibrahim El Tantawy
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: A one pot procedure was used to synthesize two new derivatives of α-aminophosphonates. Novel copper(II) complexes of α-aminophosphonates were synthesized by coordinating different copper salts with the newly synthesized α-aminophosphonates. Their structures were characterized by different spectral and analytical techniques. Evaluation of the metal-free ligands HL1, HL2, and their Cu(II) complexes against human colon carcinoma HT-29 cell lines was performed, using cisplatin as a reference drug. The results indicated that the complexes of the ligand HL1 exhibited enhanced anticancer activity, while ligand HL2 complexes showed decreased anticancer activity.
Zur Kunst der 20er und 30er Jahre in Aachen. Beiträge zur Malerei der Neuen Sachlichkeit — zeitgenössische Avantgarde und lokale Ausstellungstradition
Creators: name: Oellers, Adam C.
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 56-57 (1988-1989): Aachener Kunstblätter
On Integrating the Left-Flat Vacuum Einstein Equations
Creators: name: Newman, Ezra T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Considering the spin-coefficient version of the left-flat vacuum Einstein equations, all but one of the fifty equations can be explicitly integrated via the introduction of five spin-weight s=-2 complex potentials. The final equation is a non-linear wave equation for the last of the potentials. Solutions to this equation determine solutions for the entire system. Solutions for several special cases are obtained
description: the mislabeling of equations has been fixed
title: Expected Information Maximization: Using the I-Projection for Mixture Density Estimation
Creators: name: Becker, Philipp
name: Arenz, Oleg
name: Neumann, Gerhard
Publisher: name: UNSPECIFIED
Year: 2022

description: Modelling highly multi-modal data is a challenging problem in machine learning. Most algorithms are based on maximizing the likelihood, which corresponds to the M(oment)-projection of the data distribution to the model distribution. The M-projection forces the model to average over modes it cannot represent. In contrast, the I(nformation)-projection ignores such modes in the data and concentrates on the modes the model can represent. Such behavior is appealing whenever we deal with highly multi-modal data where modelling single modes correctly is more important than covering all the modes. Despite this advantage, the I-projection is rarely used in practice due to the lack of algorithms that can efficiently optimize it based on data. In this work, we present a new algorithm called Expected Information Maximization (EIM) for computing the I-projection solely based on samples for general latent variable models, where we focus on Gaussian mixtures models and Gaussian mixtures of experts. Our approach applies a variational upper bound to the I-projection objective which decomposes the original objective into single objectives for each mixture component as well as for the coefficients, allowing an efficient optimization. Similar to GANs, our approach employs discriminators but uses a more stable optimization procedure, using a tight upper bound. We show that our algorithm is much more effective in computing the I-projection than recent GAN approaches and we illustrate the effectiveness of our approach for modelling multi-modal behavior on two pedestrian and traffic prediction datasets.
The Concert for Bangladesh
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Benefit performances

description: Three-record set live concert recording of George Harrison's Concert for Bangladesh, featuring performances by Harrison, Ravi Shankar, Ringo Starr, Bob Dylan, and Leon Russell. The concert was recorded on 1 August 1971 at Madison Square Garden in New York, and the recording was released commercially in the United States in December 1971.
Low speed wind tunnel investigation of high lift devices on a 65 degree swept-back supersonic wing of 3.44 aspect ratio
Creators: name: Marx, Michael F.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: A low speed survey was conducted on a 3.44 aspect ratio wing having a 65° swept-back leading edge and double wedge symmetrical airfoil section to obtain information as to the effectiveness of various high-lift devices. These devices included trailing edge split and extended split flaps, leading edge split flaps, slats and combined configurations. Tests were carried out on the wing with and without the fuselage and horizontal tail surface.

The split flaps increased the lift over the lower ranges of angle of attack only. The extended split flaps increased the lift over the whole angle of attack range. Hose flaps showed practically no gain over any of the range when used by themselves. However, when combined with the trailing edge split flaps in the wing-fuselage configuration, the optimum maximum lift conditions were obtained. Addition of the fuselage and horizontal tail surfaces each produced considerable increments of lift.

In all configurations except leading edge flaps in the inboard position undesirably large negative pitching moments resulted. However, they had stabilizing tendencies except where there were irregularities in the lift curves.
The Co-Design Facilitator's Game Through the Lens of Sustainability
Creators: name: Örnekoğlu-Selçuk, Melis
name: Emmanouil, Marina
name: Grizioti, Marianthi
name: Van Langenhove, Lieva
name: Hasirci, Deniz
Publisher: name: Zenodo
Year: 2022

description: This work scrutinizes the PhD research conducted on the changing role of the designers and co-design education through the lens of sustainability. As emphasized by various researchers, the designers’ role is less about ‘designing for’ but more about ‘designing with’ users [1, 2, 3]. This shift is caused mainly by the clear understanding of the fact that the active involvement of the users in design processes may lead to real innovation. However, it is seen that how to better facilitate the co-design sessions has not been integrated into the design education curricula [4]. Thus, this PhD research aims to develop a game-based toolkit (‘Co-design Facilitator’s Game’) that would inform, motivate and/or guide design students in the facilitation of the co-design sessions. In this poster, the topic itself and the tangible outcome of this PhD research, which is a phygital game-based toolkit, have been put under the microscope in relation to sustainability. During this PhD research, several sustainability issues have been encountered and strategies have been developed to cope with them. On the technocentric level, the first coping strategy was ‘dematerialization’, which is a crucial concept for environmental sustainability that aims to reduce the use of natural sources to prevent waste [5]. On the human-centric level, the participants’ contribution is recognized and attributed through small gifts and certificates, being one of the most essential principles of design justice [6]. The ‘Co-design Facilitator’s Game’ can be still improved in relation to sustainability. First, to be more inclusive, multiple senses will be engaged in this toolkit. Moreover, in order to break the linguistic hegemony, the game-based toolkit will be designed to allow transferability and adaptability to several contexts. Lastly, the research-through-design process of this game-based toolkit will continue with the active involvement of design students, designers, and design educators through co-design sessions.
Unidentified
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Draft resisters
Amnesty
Vietnam War, 1961-1975
Anti-war demonstrations

description: Governor Albert Brewer of Alabama introduces Vice President Spiro Agnew. Agnew then gives a speech to the Alabama audience in which he defends comments he made in Des Moines, Iowa. Spiro criticizes the New York Times, discusses amnesty for draft dodgers, and criticizes the anti-Vietnam protests around the country. The occasion is a Chamber of Commerce banquet held at the Jefferson Davis Hotel in Montgomery, AL.
Betelgeuse and the red supergiants
Creators: name: van Loon, Jacco Th.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Betelgeuse is one of the most magnificent stars in the sky, and one of the nearest red supergiants. Astronomers gathered in Paris in the Autumn of 2012 to decide what we know about its structure, behaviour, and past and future evolution, and how to place this in the general context of the class of red supergiants. Here I reflect on the discussions and propose a synthesis of the presented evidence. I believe that, in those four days, we have achieved to solve a few riddles.
description: Summary talk of the Betelgeuse workshop, November 2012, Paris. To be published in the European Astronomical Society Publications Series, editors: Pierre Kervella, Thibaut Le Bertre & Guy Perrin
An analytical investigation of the ducted propeller for hydrodynamic propulsion
Creators: name: Savage, Glenn A.
Publisher: name: California Institute of Technology
Year: 1957
Subjects: Aeronautics

description: An analytical investigation was carried out to determine the design conditions, for a ducted propeller unit operating in water, providing optimum suppression of cavitation when the forward speed, depth and body drag are given. The selection charts were constructed in detail for propellers using the NACA 65 series blades. The results indicate the pumps of generally higher flow rates are more desirable than those that have been employed in the few units actually constructed.
Synthesis of sulfonamides promoted by alkyl iodide via a hypervalent iodine intermediate
Creators: name: Zhou, Zhongshi
name: He, Xuehan
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: A new method for the preparation of sulfonamides from sodium sulfinates and amines is developed. A stoichiometric amount of m-chloroperbenzoic acid as oxidant and a catalytic amount of 1-iodopropane provides the corresponding sulfonamides in good yields under mild reaction conditions. In this protocol, 1-iodopropane is first oxidized by m-chloroperbenzoic acid into the corresponding hypervalent iodine intermediate iodosylpropane, which is highly unstable and decomposes at once to form hypoiodous acid. Then, the following reaction of the generated active hypoiodous acid with sodium sulfinates and amines results in the corresponding sulfonamides.
Floating-point sparse matrix-vector multiply for FPGAs
Creators: name: deLorimier, Michael John
Publisher: name: California Institute of Technology
Year: 2005
Subjects: Floating Point
Reconfigurable Architecture
FPGA
Computer Science
Sparse Matrix

description: Large, high density FPGAs with high local distributed memory bandwidth surpass the peak floating-point performance of high-end, general-purpose processors. Microprocessors do not deliver near their peak floating-point performance on efficient algorithms that use the Sparse Matrix-Vector Multiply (SMVM) kernel. In fact, microprocessors rarely achieve 33% of their peak floating-point performance when computing SMVM. We develop and analyze a scalable SMVM implementation on modern FPGAs and show that it can sustain high throughput, near peak, floating-point performance. Our implementation consists of logic design as well as scheduling and data placement techniques. For benchmark matrices from the Matrix Market Suite we project 1.5 double precision Gflops/FPGA for a single VirtexII-6000-4 and 12 double precision Gflops for 16 Virtex IIs (750 Mflops/FPGA). We also analyze the asymptotic efficiency of our architecture as parallelism scales using a constant rent-parameter matrix model. This demonstrates that our data placement techniques provide an asymptotic scaling benefit.

While FPGA performance is attractive, higher performance is possible if we re-balance the hardware resources in FPGAs with embedded memories. We show that sacrificing half the logic area for memory area rarely degrades performance and improves performance for large matrices, by up to 5 times. We also 0 the performance effect of adding custom floating-point using a simple area model to preserve total chip area. Sacrificing logic for memory and custom floating-point units increases single FPGA performance to 5 double precision Gflops.
Facile synthesis of some new functionalized 2-selenoxopyrimidines
Creators: name: Fouda, Ahmed M.
name: Assiri, Mohammed A.
name: Ali, Tarik E.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 60506 Virology
subject: FOS: Biological sciences

description: Some new functionalized 2-selenoxodihydropyrimidines 1–6 were synthesized in good yields via a simple one-pot reaction. The simple method depended on the reaction of selenourea with some nitrile active methylene compounds under basic-catalyzed conditions. Also, treatment of selenourea with each of malononitrile and ethyl cyanoacetate in the presence of benzaldehyde under the same basic reaction conditions afforded the 2-selenoxopyrimidine-5-carbonitriles 7 and 8, respectively. Furthermore, selenourea reacted with benzaldehyde and different β-dicarbonyl compounds under Biginelli reaction conditions to afford the 2-selenoxo-1,2,3,4-tetrahydropyrimidine-5-carboxylates 10, 11 and 13. Using acetylacetone as a substrate in Biginelli reaction yielded the unexpected 5-benzylidene-4,6-dimethyl-pyrimidine-2(5H)-selenone (14). The structures of the synthesized compounds were established on the basis of elemental analysis, IR, 1H- and 13C-NMR and mass spectral data.
Synthesis of multifunctional copolymers of poly(methylphenylsilane) with (R)-N-(1-phenylethyl)methacrylamide, disperse red 1 methacrylate and their optical and photoluminescence properties
Creators: name: Meenu, Km.
name: Bag, Dibyendu S.
name: Lagarkha, Rekha
name: Tomar, Radha
name: Gupta, Arvind Kumar
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Plant Biology
subject: 60506 Virology

description: We report the synthesis and characterization of multifunctional polysilane copolymers containing chiral and azobenzene chromophore as a pendant group. Multifunctional polymers of poly(methylphenylsilane) (PMPS) with (R)-N-(1-phenylethyl)methacrylamide (R-NPEMAM) and disperse red 1 methacrylate (DR1MA) were synthesized in a quartz tube using UV-technique. The molecular weights of such synthesized copolymers were found to be in the order of 103. The appearance of two glass transition temperatures in DSC indicated that the synthesized copolymers are block copolymers. The electronic absorbance of synthesized polymers was observed at 272 nm (π-π* transition of aromatic ring), 330 nm (σ-σ* transition of Si-Si chain of PMPS) and 475 nm (n-π* with π-π* transition due to azobenzene chromophore of DR1MA unit). The chirality of the synthesized polymer was confirmed through circular dichroism observed at 261 nm. Induced chirality appeared at 330 nm and 470 nm due to the association of the Si-Si chain of PMPS and the presence of azobenzene chromophore of the DR1MA unit respectively. The photoluminescence (PL) properties of the synthesized copolymers (SCDRDM-1B, SCDRDM-2B, and SCDRDM-3B) were observed at 307 nm and 415 nm when excited at 275 nm. The λem was also observed at 415 nm when excited by 325 nm. The multi-emission spectra appeared at 500 nm, 550 and 590 nm are presumed to be due to exciton coupling between azobenzene chromophore of DR1MA, and Si-Si σ-conjugation in association with the aromatic ring of PMPS and chiral unit R-NPEMAM block.
Automatic, optimized interface placement in forward flux sampling simulations
Creators: name: Kratzer, Kai
name: Arnold, Axel
name: Allen, Rosalind J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Forward flux sampling (FFS) provides a convenient and efficient way to simulate rare events in equilibrium or non-equilibrium systems. FFS ratchets the system from an initial state to a final state via a series of interfaces in phase space. The efficiency of FFS depends sensitively on the positions of the interfaces. We present two alternative methods for placing interfaces automatically and adaptively in their optimal locations, on-the-fly as an FFS simulation progresses, without prior knowledge or user intervention. These methods allow the FFS simulation to advance efficiently through bottlenecks in phase space by placing more interfaces where the probability of advancement is lower. The methods are demonstrated both for a single-particle test problem and for the crystallization of Yukawa particles. By removing the need for manual interface placement, our methods both facilitate the setting up of FFS simulations and improve their performance, especially for rare events which involve complex trajectories through phase space, with many bottlenecks.
description: 13 pages, 9 figures
Probing hidden topology with quantum detectors
Creators: name: Bhattacharya, Dyuman
name: Louko, Jorma
name: Mann, Robert B.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the transition rate of a static Unruh-DeWitt detector in two $(2+1)$-dimensional black hole spacetimes that are isometric to the static Bañados-Teitelboim-Zanelli black hole outside the horizon but have no asymptotically locally anti-de Sitter exterior behind the horizon. The spacetimes are the $\mathbb{R}\text{P}^{2}$ geon, with spatial topology $\mathbb{R}\text{P}^{2}\setminus\{\text{point at infinity}\}$, and the Swedish geon of Åminneborg \emph{et al\/}, with spatial topology $T^{2}\setminus\{\text{point at infinity}\}$. For a conformal scalar field, prepared in the Hartle-Hawking-type state that is induced from the global vacuum on the anti-de Sitter covering space, we show numerically that the detector's transition rate distinguishes the two spacetimes, particularly at late exterior times, and we trace this phenomenon to the differences in the isometries that are broken by the quotient construction from the universal covering space. Our results provide an example in which information about the interior topology of a black hole is accessible to a quantum observer outside the black hole.
description: 17 pages, 10 figures. v2: presentational clarifications
Investigations of the aerodynamic interactions between wind tunnel models and their support systems at the GALCIT ten foot wind tunnel
Creators: name: Smith, Josiah E.
Publisher: name: California Institute of Technology
Year: 1948
Subjects: Aeronautics

description: This work is divided into two parts.  Part I describes the GALCIT image system tare procedure as it is used at the present time, the techniques of operation, and the assumptions used.  The tare procedure is an experimental method for obtaining the aerodynamic interference forces and moments produced on a wind tunnel model by the supporting structure which holds it fixed in the windstream.  The present technique has been in use at GALCIT for over five years, during which time many small inconstancies kept recurring, indicating the need for refinement of the procedures.  Part II is a report on the first phase of the investigations planned for the attack on these problems.

In Part II are given the measurements of the interactions on a simple, rectangular wing, and of the air loads on the suspension system without a model present.  An attempt is made to give a physical picture of the rather elaborate flow patterns around the windshields, and of what happens to the aerodynamic characteristics of a wing when it is immersed in such a flow field.  Some of the inadequacies of the present techniques are isolated and their magnitudes determined.  A first try is made at measuring the tares for a yawed wing, with encouraging results.  The need for further experimental work is clearly indicated, as well as for a theoretical study of the flow patterns in the tunnel throat.
Beyond Binary: Towards Fine-Grained LLM-Generated Text Detection via Role Recognition and Involvement Measurement
Creators: name: Cheng, Zihao
name: Zhou, Li
name: Jiang, Feng
name: Wang, Benyou
name: Li, Haizhou
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The rapid development of large language models (LLMs), like ChatGPT, has resulted in the widespread presence of LLM-generated content on social media platforms, raising concerns about misinformation, data biases, and privacy violations, which can undermine trust in online discourse. While detecting LLM-generated content is crucial for mitigating these risks, current methods often focus on binary classification, failing to address the complexities of real-world scenarios like human-LLM collaboration. To move beyond binary classification and address these challenges, we propose a new paradigm for detecting LLM-generated content. This approach introduces two novel tasks: LLM Role Recognition (LLM-RR), a multi-class classification task that identifies specific roles of LLM in content generation, and LLM Influence Measurement (LLM-IM), a regression task that quantifies the extent of LLM involvement in content creation. To support these tasks, we propose LLMDetect, a benchmark designed to evaluate detectors' performance on these new tasks. LLMDetect includes the Hybrid News Detection Corpus (HNDC) for training detectors, as well as DetectEval, a comprehensive evaluation suite that considers five distinct cross-context variations and two multi-intensity variations within the same LLM role. This allows for a thorough assessment of detectors' generalization and robustness across diverse contexts. Our empirical validation of 10 baseline detection methods demonstrates that fine-tuned PLM-based models consistently outperform others on both tasks, while advanced LLMs face challenges in accurately detecting their own generated content. Our experimental results and analysis offer insights for developing more effective detection models for LLM-generated content. This research enhances the understanding of LLM-generated content and establishes a foundation for more nuanced detection methodologies.
description: Social Media, Large Language Models, LLM-generated Text Detection, AI-assisted News Detection; Accepted by WWW2025
Preventing Catastrophic Forgetting Using Prior Transfer in Physics Informed Bayesian Neural Networks
Creators: name: Van Heck, Cedric
name: Crevecoeur, Guillaume
Publisher: name: Zenodo
Year: 2022

description: Predictive models can be integrated in the sensing and monitoring methodologies of mechatronic systems in operation. When systems change or are subject to varying operating conditions, adaptivity of the models is needed. The goal of this paper is to enable this adaptivity by presenting a framework for continual learning. The framework aims to transfer and remember information from previously learned systems when a model is updated to new operating conditions. We achieve this by means of the following three key mechanisms. We first include physical information about the system, heavily regularizing the model output. Secondly, the usage of epistemic uncertainty, used as an indicator of the changing system, shows to what extend a transfer is desired. Last but not least the usage of a prior within a Bayesian framework allows to regularize models further according to previously obtained information. The last two principles are enabled thanks to the use of Bayesian neural networks. The methodology will be applied to a camfollower system in a simulation environment, where results show that previously trained systems are better remembered with an increase of 72% compared to normal training procedures.
Origin Scenarios for the Kepler 36 Planetary System
Creators: name: Quillen, Alice C.
name: Bodman, Eva
name: Moore, Alexander
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We explore scenarios for the origin of two different density planets in the Kepler 36 system in adjacent orbits near the 7:6 mean motion resonance. We find that fine tuning is required in the stochastic forcing amplitude, the migration rate and planet eccentricities to allow two convergently migrating planets to bypass mean motion resonances such as the 4:3, 5:4 and 6:5, and yet allow capture into the 7:6 resonance. Stochastic forcing can eject the system from resonance causing a collision between the planets, unless the disk inducing migration and stochastic forcing is depleted soon after resonance capture. We explore a scenario with approximately Mars mass embryos originating exterior to the two planets and migrating inwards toward two planets. We find that gravitational interactions with embryos can nudge the system out of resonances. Numerical integrations with about a half dozen embryos can leave the two planets in the 7:6 resonance. Collisions between planets and embryos have a wide distribution of impact angles and velocities ranging from accretionary to disruptive. We find that impacts can occur at sufficiently high impact angle and velocity that the envelope of a planet could have been stripped, leaving behind a dense core. Some of our integrations show the two planets exchanging locations, allowing the outer planet that had experienced multiple collisions with embryos to become the innermost planet. A scenario involving gravitational interactions and collisions with embryos may account for both the proximity of the Kepler 36 planets and their large density contrast.
description: accepted for publication in MNRAS
Novel dibenzosuberene substituted aroyl selenoureas: Synthesis, crystal structure, DFT, molecular docking and biological studies
Creators: name: Musthafa, Moideen
name: Konakanchi, Ramaiah
name: Ganguly, Rakesh
name: Sreekanth, Anandaram
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: A series of aroyl selenourea dibenzosuberene (1–3) derivatives were synthesized and characterized by different analytical methods and single crystal X-ray crystallography. Quantum chemical computations were made using DFT to determine the structural and molecular properties of the compounds. The in vitro antibacterial action of the compounds was evaluated against chosen gram-negative (Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli), and gram-positive (Bacillus subtilis, Staphylococcus aureus, and Staphylococcus epidermidis) bacteria for their antifungal activity against Curvularia lunata, Penicillium notatum, and Aspergillus niger. Using molecular docking studies, the binding modes were understood along with the mechanism in opposing the target protein MurB.
Вопросы устойчивого развития общества,Выпуск 12 МКПЦР 2022
Creators: name: ООО "Институт развития образования и консалтинга"
Publisher: name: ООО "Институт развития образования и консалтинга"
Year: 2022

description: Вопросы устойчивого развития общества,Выпуск 12 МКПЦР 2022
title: Калибровка многоканальных ФАР по перекрывающимся группам каналов
Creators: name: ., А.М. Шитиков – к.т.н., начальник сектора, ПАО «Радиофизика» (Москва); преподаватель, Московский физико-технический институт (государственный университет) E-mail: shitikov.a@radiofizika.com Е.В. Коротецкий – вед. инженер, ПАО «Радиофизика» (Москва) E-mail: kitkik@gmail.com
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Калибровка многоканальных ФАР вынужденно проводится вне лабораторий и безэховых камер из-за своего размера. Такие антенны нередко калибруются по частям или группам каналов.
Цель. Предложить решение задачи совмещения результатов, полученных при калибровке разных перекрывающихся групп ФАР.
Результаты. Рассмотрена задача совмещения по фазе результатов калибровки для нескольких групп каналов ФАР, имеющих общие каналы. Показано, что простое вычисление средней разности фаз, полученных в разных группах для общих каналов, может привести к большим ошибкам. Предложены два алгоритма совмещения результатов групп и проведено сравнение точности алгоритмов. Даны оценки для выбора оптимального числа каналов, общих для соседних групп.
Практическая значимость. Получено выражение для полной ошибки совмещения нескольких групп, от одной группы к другой. Предлагается осуществлять перекрытие между группами по числу каналов, не менее чем вдвое превышающему число групп.
Gauge theories in anti-selfdual variables
Creators: name: Bochicchio, M.
name: Pilloni, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Some years ago the Nicolai map, viewed as a change of variables from the gauge connection in a fixed gauge to the anti-selfdual part of the curvature, has been extended by the first named author to pure YM from its original definition in N=1 SUSY YM. We study here the perturbative 1PI effective action in the anti-selfdual variables of any gauge theory, in particular pure YM, QCD and N=1 SUSY YM. We prove that the one-loop 1PI effective action of a gauge theory mapped to the anti-selfdual variables in any gauge is identical to the one of the original theory. This is due to the conspiracy between the Jacobian of the change to the anti-selfdual variables and an extra functional determinant that arises from the non-linearity of the coupling of the anti-selfdual curvature to an external source in the Legendre transform that defines the 1PI effective action. Hence we establish the one-loop perturbative equivalence of the mapped and original theories on the basis of the identity of the one-loop 1PI effective actions. Besides, we argue that the identity of the perturbative 1PI effective actions extends order by order in perturbation theory.
description: 19 pages; paper shortened and sharpened according to the referee suggestions
title: Синтез антенн: оптимизация решения с учетом конечной точности его реализации
Creators: name: ., Ю.И. Чони – к.т.н., доцент, Казанский национальный исследовательский технический университет им. А.Н. Туполева - КАИ E-mail: tchoni@rambler.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Обратные задачи, к которым относится синтез антенн, зачастую некорректны. С учетом случайной природы погрешностей δI(ρ) представляет интерес задача поиска такого номинального решения Iн(ρ), реализация которого в условиях определенной точности воспроизведения обеспечивает минимальное значение усредненного отклонения реализуемой ДН от заданной.
Цель. Выяснить, как изменяется решение задачи синтеза антенны по заданной ДН при переходе от традиционного среднеквадратичного отклонения (СКО) к СКО по форме ДН, и тем самым популяризировать само понятие СКО по форме ДН.
Результаты. Рассмотрена задача поиска такого номинального решения в антенной решетке, которому в условиях конечной точности воспроизведения соответствует минимум математического ожидания СКО от заданной ДН. Использовано понятие СКО по форме ДН, значение которого не зависит от «масштабных» коэффициентов сопоставляемых ДН. Дан анализ соотношения рассматриваемой задачи и проблемы регуляризации Тихонова, как в постановочном плане, так и по структуре решений.
Практическая значимость. На конкретном примере показана целесообразность использования СКО по форме ДН в рамках обсуждаемой проблемы оптимизации.
Joint Optimization of Throughput and Packet Drop Rate for Delay Sensitive Applications in TDD Satellite Network Coded Systems
Creators: name: Esmaeilzadeh, Mohammad
name: Aboutorab, Neda
name: Sadeghi, Parastoo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, we consider the issue of throughput and packet drop rate (PDR) optimization as two performance metrics for delay sensitive applications in network coded time division duplex (TDD) satellite systems with large round trip times (RTT). We adopt random linear network coding (RLNC) under two different scenarios, feedback-less and with feedback, and our goal is to jointly optimize the mean throughputs and PDRs of users in the system. For this purpose, we propose a systematic framework and start with formulating and optimizing these performance metrics for the single-user case. This framework enables us to analytically compare the performance metrics under different system parameters and settings. By comparing RLNC schemes under feedback-less and feedback scenarios for different RTTs, we show that the feedback-less schemes outperform the schemes with feedback in TDD systems with large RTTs. Then, we extend the study of feedback-less RLNC schemes to the multi-user broadcast case. Here, we consider a number of different broadcast scenarios and optimize the system parameters such that the best overall performance is achieved. Furthermore, the complicated interplay of the mean throughputs and PDRs of different users with different packet erasure conditions in each of the considered broadcast scenarios is discussed.
description: 14 pages, 7 figures, 2 tables. Submitted to IEEE Transactions on Communications
Transition metal complexes of α-aminophosphonates part II: Synthesis, spectroscopic characterization, and in vitro anticancer activity of copper(II) complexes of α-aminophosphonates
Creators: name: Azzam, Mariam Ahmed
name: El-Boraey, Hanaa Abdel Latif
name: El-Sayed, Ibrahim El Tantawy
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: A one pot procedure was used to synthesize two new derivatives of α-aminophosphonates. Novel copper(II) complexes of α-aminophosphonates were synthesized by coordinating different copper salts with the newly synthesized α-aminophosphonates. Their structures were characterized by different spectral and analytical techniques. Evaluation of the metal-free ligands HL1, HL2, and their Cu(II) complexes against human colon carcinoma HT-29 cell lines was performed, using cisplatin as a reference drug. The results indicated that the complexes of the ligand HL1 exhibited enhanced anticancer activity, while ligand HL2 complexes showed decreased anticancer activity.
title: Выбор коэффициентов диффузии для фильтра Калмана с компенсацией скоростной ошибки по дальности
Creators: name: ., М.А. Мурзова – аспирант, Московский физико-технический институт (государственный университет); инженер, ПАО «Радиофизика» (Москва) E-mail: mariya.trofimenko@phystech.edu
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Наличие скоростной ошибки в измерениях дальности приводит к необходимости разработки алгоритмов оценки параметров движения ОН для РЛС с ЛЧМ-сигналами, учитывающих наличие или, другими словами, производящих компенсацию скоростной ошибки. Эти алгоритмы основаны на соотношениях фильтра Калмана, имеющего удобную для реализации на цифровой вычислительной машине (ЦВМ) рекуррентную структуру.
Цель. Определить параметры матрицы диффузии и эволюции диффузионного процесса диффузионного фильтра с полной компенсацией скоростной ошибки, при которых данный фильтр в установившемся режиме аппроксимирует фильтр с конечной памятью и полной компенсацией скоростной ошибки. При этом его корреляционная матрица ошибок оценок совпадает с корреляционной матрицей ошибок оценок диффузионного фильтра с последующей компенсацией скоростной ошибки.
Результаты. Проведено исследование влияния параметров диффузионного процесса на точностные характеристики фильтров первого порядка, реализующих процесс автосопровождения по дальности объектов радиолокационными станциями с ЛЧМ-сигналом. Получены выражения для определения коэффициентов диффузии фильтра Калмана, аппроксимирующего в установившемся режиме фильтр с конечной памятью и учетом наличия скоростной ошибки в измерениях дальности. Показано, что при полученных коэффициентах диффузии корреляционная матрица ошибок оценок в установившемся режиме совпадает с корреляционной матрицей ошибок оценок фильтра Калмана с нулевыми коэффициентами диффузии, производящего оценку смещенной дальности и с последующей компенсацией скоростной ошибки после текущего шага фильтрации. Отмечено, что оба рассмотренных фильтра Калмана имеют одинаковые точностные характеристики в установившемся режиме.
Практическая значимость. Полученные результаты позволяют проводить вычисления коэффициентов диффузии, обеспечивающих заданные точностные характеристики на выходе диффузионного фильтра с полной компенсацией скоростной ошибки.
The Biggest Explosions in the Universe
Creators: name: Johnson, Jarrett L.
name: Whalen, Daniel J.
name: Even, Wesley
name: Fryer, Chris L.
name: Heger, Alex
name: Smidt, Joseph
name: Chen, Ke-Jung
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Supermassive primordial stars are expected to form in a small fraction of massive protogalaxies in the early universe, and are generally conceived of as the progenitors of the seeds of supermassive black holes (BHs). Supermassive stars with masses of ~55,000 M_Sun, however, have been found to explode and completely disrupt in a supernova (SN) with an energy of up to ~10^55 erg instead of collapsing to a BH. Such events, ~10,000 times more energetic than typical SNe today, would be among the biggest explosions in the history of the universe. Here we present a simulation of such a SN in two stages. Using the RAGE radiation hydrodynamics code we first evolve the explosion from an early stage through the breakout of the shock from the surface of the star until the blast wave has propagated out to several parsecs from the explosion site, which lies deep within an atomic cooling dark matter (DM) halo at z ~ 15. Then, using the GADGET cosmological hydrodynamics code we evolve the explosion out to several kiloparsecs from the explosion site, far into the low-density intergalactic medium. The host DM halo, with a total mass of 4 x 10^7 M_Sun, much more massive than typical primordial star-forming halos, is completely evacuated of high density gas after < 10 Myr, although dense metal-enriched gas recollapses into the halo, where it will likely form second-generation stars with metallicities of ~ 0.05 Z_Sun after > 70 Myr. The chemical signature of supermassive star explosions may be found in such long-lived second-generation stars today.
description: 9 pages, 7 figures; accepted for publication in ApJ; a short movie of the explosion can be found at http://www.as.utexas.edu/~jljohnson/SMS_SN.mp4
Agent-based and macroscopic modeling of the complex socio-economic systems
Creators: name: Kononovicius, Aleksejus
name: Daniunas, Valentas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: The current economic crisis has provoked an active response from the interdisciplinary scientific community. As a result many papers suggesting what can be improved in understanding of the complex socio-economics systems were published. Some of the most prominent papers on the topic include (Bouchaud, 2009; Farmer and Foley, 2009; Farmer et al, 2012; Helbing, 2010; Pietronero, 2008). These papers share the idea that agent-based modeling is essential for the better understanding of the complex socio-economic systems and consequently better policy making. Yet in order for an agent-based model to be useful it should also be analytically tractable, possess a macroscopic treatment (Cristelli et al, 2012). In this work we shed a new light on our research group's contributions towards understanding of the correspondence between the inter-individual interactions and collective behavior. We also provide some new insights into the implications of the global and local interactions, the leadership and the predator-prey interactions in the complex socio-economic systems.
description: 12 pages, 6 figures