cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Broadband Phase-Noise Suppression in a Yb-Fiber Frequency Comb
Creators: name: Cingoz, A.
name: Yost, D. C.
name: Allison, T. K.
name: Ruehl, A.
name: Fermann, M. E.
name: Hartl, I.
name: Ye, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report a simple technique to suppress high frequency phase noise of a Yb-based fiber optical frequency comb using an active intensity noise servo. Out-of-loop measurements of the phase noise using an optical heterodyne beat with a continuous wave (cw) laser show suppression of phase noise by \geq7 dB out to Fourier frequencies of 100 kHz with a unity-gain crossing of -700 kHz. These results are enabled by the strong correlation between the intensity and phase noise of the laser. Detailed measurements of intensity and phase noise spectra, as well as transfer functions, reveal that the dominant phase and intensity noise contribution above -100 kHz is due to amplified spontaneous emission (ASE) or other quantum noise sources.
description: 4 pages, 3 figures
Remaking place in Little Saigon : a proposal for the retention and evolution of the identity of an ethnic neighborhood in Vancouver
Creators: name: Dinh, Long
Publisher: name: University of British Columbia
Year: 2021

description: Small-business entrepreneurialism has been an important characteristic of the immigrant and ethnic identity in cities. The Vietnamese community in Greater Vancouver, Canada is no stranger to this. Small-business entrepreneurialism in Little Saigon along Kingsway has defined the Vietnamese Canadian experience in the city and the metro area for more than four decades. The thoroughfare has proven to be a place nurturing Vietnamese upward mobility as it offers economic opportunities to those with limited capital. However, the vibrant scene of Vietnamese and other ethnic businesses on Kingsway is being threatened by a rapid wave of redevelopments facilitated by urban policies and financial practices that pit the real estate market against ethnic neighborhoods. Today young Vietnamese have to become more creative and technologically savvy to circumvent the high costs of starting their businesses. This thesis, by reimagining the designs of the neighborhood, proposes several alternatives in urban policies and business financing options for the city, the local community, and financial stakeholders to curb the negative effects of redevelopment, uphold Kingsway’s entrepreneurial spirit, and expand upward mobility among those with limited capital, including local Vietnamese.
Additional file 1 of Mixed-species groups in bats: non-random roost associations and roost selection in neotropical understory bats
Creators: name: Kelm, Detlev H.
name: Toelch, Ulf
name: Jones, Mirkka M.
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Number of roosts and observations of bat species in roosts in different habitats (forest vs. disturbed). Fig. S1. GLMM beta parameter estimates for the effect of the presence or abundance of selected other bat species on the incidence of a focal bat species in natural and in artifical roosts in the forest habitat and artificial roosts in the disturbed habitat. Table S2. Roost variables used for modelling species-specific roost selection, their mean and range in roosts occupied by each of six focal bat species, and the percentage of roosts occupied by each bat species that were in standing trees. Fig. S2. Results of GLM on the effect of roost parameters on the total number of bat species using natural roosts (not necessarily simultaneously). Fig. S3. Temperature during five days at three different heights inside a bat roost in a large hollow tree.
Synthesis and physical properties of uranium thin-film hydrides UH2 and \b{eta}-UH3
Creators: name: Tereshina-Chitrova, Evgenia A.
name: Havela, Ladislav
name: Paukov, Mykhaylo
name: Koloskova, Oleksandra
name: Horak, Lukas
name: Dopita, Milan
name: Celis, Mayerling Martinez
name: Cieslar, Miroslav
name: Soban, Zbynek
name: Gouder, Thomas
name: Huber, Frank
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Formation of thin uranium hydrides films, UH2 and \b{eta}-UH3, synthesized by a reactive dc sputtering of uranium metal, was explored using variable deposition conditions. Obtained stable oxygen-free hydride films were studied by a variety of methods, both in situ (photoelectron spectroscopy - XPS), and ex-situ (x-ray diffraction - XRD, transmission electron microscopy - TEM), electrical resistivity, and magnetometry). Both types of hydrides are ferromagnetic, the Curie temperatures of UH2 and \b{eta}-UH3 are approx. 120 and 170 K, respectively. Ferromagnetism in the thin films is robust and does not depend on structure details while electrical resistivity data reflect disorder in both types of hydrides.
Microwave Induced Zero-Conductance State in a Corbino Geometry 2D Electron Gas with Capacitive Contacts
Creators: name: Bykov, A. A.
name: Marchishin, I. V.
name: Goran, A. V.
name: Dmitriev, D. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Microwave induced photoconductivity of a two-dimensional electron gas (2DEG) in selectively-doped GaAs/AlAs heterostructures has been studied using the Corbino geometry with capacitive contacts at a temperature T=1.6K and magnetic field B up to 0.5 T. Zero-conductance states have been observed in the samples under study subject to microwave radiation, similarly to the samples with ohmic contacts. It has been shown that ohmic contacts do not play a significant role for observation of zero-conductance states induced by microwave radiation
description: 5 pages, 4 figures
The targum (1887:Dec. 16)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1887

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
Entropy and light cluster production in heavy-ion collisions at intermediate energies
Creators: name: Vermani, Yogesh K.
name: Puri, Rajeev K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The entropy production in medium energy heavy-ion collisions is analyzed in terms of ratio of deuteronlike to protonlike clusters ($d_{like}/p_{like}$) using \emph{quantum molecular dynamics} (QMD) model. The yield ratios of deuteronlike-to-protonlike clusters calculated as a function of participant proton multiplicity closely agree with experimental trends. Our model predictions indicate that full thermodynamical equilibrium may not be there even for the central geometry. The apparent entropy extracted from the yield ratios of deuteronlike-to-protonlike clusters, however, reflects the universality characteristics \emph{i.e.} it is governed by the volume of reaction independent of the target-projectile combination. Our calculations for apparent entropy produced in central collisions of Ca+Ca and Nb+Nb at different bombarding energies are in good agreement with $4π$ Plastic Ball data.
description: 13 pages, 6 figures, in press
Prospects for constraining interacting dark energy models from gravitational wave and gamma ray burst joint observation
Creators: name: Hou, Wan-Ting
name: Qi, Jing-Zhao
name: Han, Tao
name: Zhang, Jing-Fei
name: Cao, Shuo
name: Zhang, Xin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: With the measurement of the electromagnetic (EM) counterpart, a gravitational wave (GW) event could be treated as a standard siren. As a novel cosmological probe, GW standard sirens will bring significant implications for cosmology. In this paper, by considering the coincident detections of GW and associated $γ$ ray burst (GRB), we find that only about 400 GW bright standard sirens from binary neutron star mergers could be detected in a 10-year observation of the Einstein Telescope and the THESEUS satellite mission. Based on this mock sample, we investigate the implications of GW standard sirens on the interaction between dark energy and dark matter. In our analysis, four viable interacting dark energy (IDE) models, with interaction forms $Q=3βH ρ_{\mathrm{de}}$ and $Q=3 βH ρ_{\mathrm{c}}$, are considered. Compared with the traditional EM observational data such as CMB, BAO, and SN Ia, the combination of both GW and EM observations could effectively break the degeneracies between different cosmological parameters and provide more stringent cosmological fits. We find that the GW data could play a more important role for determining the interaction in the models with $Q=3 βH ρ_{\mathrm{c}}$, compared with the models with $Q=3βH ρ_{\mathrm{de}}$. We also show that constraining IDE models with mock GW data based on different fiducial $H_0$ values yield different results, indicating that accurate determination of $H_0$ is significant for exploring the interaction between dark energy and dark matter.
description: 17 pages, 5 figures
Interaction between Tachyon and Hessence (or Hantom) dark energies
Creators: name: Chattopadhyay, Surajit
name: Debnath, Ujjal
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we have considered that the universe is filled with tachyon, hessence (or hantom) dark energies. Subsequently we have investigated the interactions between tachyon and hessence (hantom) dark energies and calculated the potentials considering the power law form of the scale factor. It has been revealed that the tachyonic potential always decreases and hessence (or hantom) potential increases with corresponding fields. Furthermore, we have considered a correspondence between the hessence (or hantom) dark energy density and new variable modified Chaplygin gas energy density. From this, we have found the expressions of the arbitrary positive constants B0 and C of new variable modified Chaplygin gas.
The voice of the land : a performative visual music composition of the Okanagan Valley
Creators: name: Holt, Emerald
Publisher: name: University of British Columbia
Year: 2021

description: "The Voice of the Land" combines the exquisite sounds and colors of nature to create an expressive Visual Music composition of the Okanagan Valley, BC. Utilizing creative research methodology process, I recorded original soundscapes of the Okanagan environment, and created visualizations based on the four seasons. My composition is based on the interwoven melodies and visuals of the local landscape, creating an immersive media artwork that invites people to experience nature's marvelous vocabulary. I composed four movements of multimodal experience which corresponds to the viewers’ presence in the valley. In the interactive installation there is a light source that illuminates the zone of interaction, where viewers trigger samples of prepared piano, flute and cello sonification based on scales derived from nature. I developed several versions of the software that allowed the audience to interact in two ways: as dancers and as audience members. By using real-time visual and audio processing "The Voice of the Land" promotes unique connections between the local environment and our experience of nature. The installation will assist the public in building lasting relationships with their natural surroundings which will be critical in a future defined by environmental challenges. This was one of the first studies to present the soundscape of the Okanagan using contemporary sonic technology, and it brought to life the metaphoric expressions of the land through innovative interactive performances and visualizations. The project was a result of extensive study of visual music theory and involved research creation methods and theoretical ideas. Given my background as a trained pianist, a painter, a digital media animator, and a 3D modeler, the completion of the research project was a rewarding journey.
Additional file 1 of Thymic carcinoma metastasize to the small intestine: a case report
Creators: name: Yuan, Yi
name: Pu, Hong
name: Pang, Ming-hui
name: Liu, Yi-sha
name: Li, Hang
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 1. CARE Checklist of Information.
Additional file 1 of Germline mutations among Polish patients with acute myeloid leukemia
Creators: name: Bąk, Aneta
name: Skonieczka, Katarzyna
name: Jaśkowiec, Anna
name: Junkiert-Czarnecka, Anna
name: Heise, Marta
name: Pilarska-Deltow, Maria
name: Potoczek, Stanisław
name: Czyżewska, Maria
name: Haus, Olga
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¼Ð°ÑÑÐ¸Ñ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÐ¸Ð±ÑÐ¾Ð¸Ð½Ð° ÑÐµÐ»ÐºÐ° Ð´Ð»Ñ Ð·Ð°Ð´Ð°Ñ ÑÐºÐ°Ð½ÐµÐ²Ð¾Ð¹ Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ¸Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Development of silk fibroin based matrices for tissue engineering
Creators: name: ÐÐ°ÑÑÐ¿Ð¾Ð², ÐÑÑÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: ÑÐ¸Ð±ÑÐ¾Ð¸Ð½ ÑÐµÐ»ÐºÐ°
ÑÐºÐ°Ð½ÐµÐ²Ð°Ñ Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ¸Ñ
ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¼Ð°ÑÑÐ¸Ñ
silk fibroin
tissue engineering
development of matrices

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ ÑÐ¿Ð¾ÑÐ¾Ð±Ð¾Ð² ÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¼Ð°ÑÑÐ¸Ñ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð²Ð¾Ð´Ð½Ð¾Ð³Ð¾ ÑÐ°ÑÑÐ²Ð¾ÑÐ° ÑÐ¸Ð±ÑÐ¾Ð¸Ð½Ð° ÑÐµÐ»ÐºÐ°. ÐÑÐµÐ¶Ð´Ðµ Ð²ÑÐµÐ³Ð¾, Ð±ÑÐ»Ð¸ Ð¾ÑÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÑÐ»Ð¾Ð²Ð¸Ñ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð¸Ñ Ð²Ð¾Ð´Ð½ÑÑ ÑÐ°ÑÑÐ²Ð¾ÑÐ¾Ð² ÑÐ¸Ð±ÑÐ¾Ð¸Ð½Ð° ÑÐµÐ»ÐºÐ°, Ð² ÑÐ¾Ð¼ ÑÐ¸ÑÐ»Ðµ Ð¿Ð¾Ð´Ð¾Ð±ÑÐ°Ð½Ñ ÑÐ°ÑÑÐ²Ð¾ÑÐ¸ÑÐµÐ»Ð¸, ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ° ÑÐ°ÑÑÐ²Ð¾ÑÐµÐ½Ð¸Ñ Ð¸ Ð²ÑÐµÐ¼Ñ Ð´Ð¸Ð°Ð»Ð¸Ð·Ð°. Ð¡ÑÑÑÐºÑÑÑÐ° Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ð¸Ð¼ÐµÑÐ° Ð±ÑÐ»Ð° Ð¿Ð¾Ð´ÑÐ²ÐµÑÐ¶Ð´ÐµÐ½Ð° Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ ÐÐ-ÑÐ¿ÐµÐºÑÑÐ¾ÑÐºÐ¾Ð¿Ð¸Ð¸. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÑ ÑÐ°ÑÑÐ²Ð¾ÑÐ¾Ð² Ð±ÑÐ»Ð¸ Ð¿ÑÐ¸Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ñ Ð¿Ð»ÑÐ½ÐºÐ¸ ÑÐ°Ð·Ð»Ð¸ÑÐ½Ð¾Ð¹ ÑÐ¾Ð»ÑÐ¸Ð½Ñ. ÐÑÐ»Ð¾ Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð¾, ÑÑÐ¾ Ð¾Ð¿ÑÐ¸Ð¼Ð°Ð»ÑÐ½ÑÐ¼Ð¸ Ð¿Ð¾ ÑÐ¾Ð»ÑÐ¸Ð½Ðµ ÑÐ²Ð»ÑÑÑÑÑ Ð¿Ð»ÑÐ½ÐºÐ¸, Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÐµ Ð¸Ð· ÑÐ°ÑÑÐ²Ð¾ÑÐ° Ñ ÐºÐ¾Ð½ÑÐµÐ½ÑÑÐ°ÑÐ¸ÐµÐ¹ 3, 5 Ð¸ 7 %. ÐÐµÑÐ¾Ð´Ð¾Ð¼ ÑÐ²ÐµÑÐ¾Ð²Ð¾Ð¹ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð¹ Ð¼Ð¸ÐºÑÐ¾ÑÐºÐ¾Ð¿Ð¸Ð¸ Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð¾, ÑÑÐ¾ Ð¿Ð»ÑÐ½ÐºÐ¸, Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÐµ Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ Ð¿Ð¾Ð»Ð¸Ð²Ð° Ð¸Ð· ÑÐ°ÑÑÐ²Ð¾ÑÐ°, Ð¸Ð¼ÐµÐ»Ð¸ ÑÐ¾Ð²Ð½ÑÑ Ð¿Ð¾Ð²ÐµÑÑÐ½Ð¾ÑÑÑ Ð±ÐµÐ· Ð²Ð¸Ð´Ð¸Ð¼ÑÑ Ð´ÐµÑÐµÐºÑÐ¾Ð². ÐÐ¾Ð»ÑÑÐµÐ½Ð½ÑÐµ Ð¿Ð»ÑÐ½ÐºÐ¸ Ð¿Ð¾ÑÐ»Ðµ Ð´Ð¾Ð¿Ð¾Ð»Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÑ Ð¼Ð¾Ð´Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¹ Ð¼Ð¾Ð³ÑÑ Ð±ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ñ Ð´Ð»Ñ ÐºÑÐ»ÑÑÐ¸Ð²Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¸ ÑÑÐ°Ð½ÑÐ¿Ð»Ð°Ð½ÑÐ°ÑÐ¸Ð¸ ÐºÐ»ÐµÑÐ¾Ðº.
description: This work is devoted to the development of methodsfor the formation of matrices based on an aqueous solution of silk fibroin. First of all, the conditions for obtaining aqueous solutions of silk fibroin were worked out, including solvents, dissolution temperature and dialysis time. The structure of the obtained polymer was confirmed by IR spectroscopy. Based on the obtained solutions, films of various thicknesses were prepared. It was shown that films obtained from a solution with a concentration of 3, 5, and 7% are optimal in thickness. Using the method of light and scanning electron microscopy, it was shown that the films obtained by the method of irrigation from the solution had a smooth surface. The resulting films after additional modifications can be used for cell culture and transplantation.
Search for heavy bottom-like quarks decaying to an electron or muon and jets in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
Creators: name: The CDF Collaboration
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report the most sensitive direct search for pair production of fourth-generation bottom-like chiral quarks ($b'$) each decaying promptly to $tW$. We search for an excess of events with an electron or muon, at least five jets (one indentified as due to a $b$ or $c$ quark) and an imbalance of transverse momentum using data from $p\bar{p}$ collisions collected by the CDF II detector at Fermilab with an integrated luminosity of 4.8 fb$^{-1}$. We observe events consistent with background expectation and calculate upper limits on the $b'$ pair production cross section ($σ_{b\bar{b'}}\lesssim 30$ fb for $m_{b'}>$375 GeV/$c^2$) and exclude $m_{b'}<372$ \gevcc at 95% confidence level.
description: For submission to PRL
Noisy Stabilizer Formalism
Creators: name: Mor-Ruiz, Maria Flors
name: Dür, Wolfgang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Despite the exponential overhead to describe general multi-qubit quantum states and processes, efficient methods for certain state families and operations have been developed and utilised. The stabilizer formalism and the Gottesman-Knill theorem, where pure stabilizer or graph states are manipulated by Clifford operations and Pauli measurements, are prominent examples, and these states play a major role in many applications in quantum technologies. Here we develop a noisy stabilizer formalism, i.e., a method that allows one not only to efficiently describe and follow pure states under Clifford operations and Pauli measurements but also Pauli noise processes acting on such stabilizer states, including uncorrelated and correlated dephasing and single- or multi-qubit depolarizing noise. The method scales linearly in the number of qubits of the initial state, but exponentially in the size of the target state. Thus, whenever a noisy stabilizer state is manipulated by means of local Pauli measurements such that a multipartite entangled state of a few qubits is generated, one can efficiently describe the resulting state.
Extending PLE models into the mid-IR, far-IR & sub-mm
Creators: name: Hill, Michael D.
name: Shanks, Tom
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Simple pure luminosity evolution (PLE) models, in which galaxies brighten at high redshift due to increased star-formation rates (SFRs), are known to provide a good fit to the colours and number counts of galaxies throughout the optical and near-infrared. We show that optically defined PLE models, where dust reradiates absorbed optical light into infrared spectra composed of local galaxy templates, fit galaxy counts and colours out to 8um and to at least z=2.5. At 24-70um, the model is able to reproduce the observed source counts with reasonable success if 16% of spiral galaxies show an excess in mid-IR flux due to a warmer dust component and a higher SFR, in line with observations of local starburst galaxies. There remains an under-prediction of the number of faint-flux, high-z sources at 24um, so we explore how the evolution may be altered to correct this. At 160um and longer wavelengths, the model fails, with our model of normal galaxies accounting for only a few percent of sources in these bands. However, we show that a PLE model of obscured AGN, which we have previously shown to give a good fit to observations at 850um, also provides a reasonable fit to the Herschel/BLAST number counts and redshift distributions at 250-500um. In the context of a LCDM cosmology, an AGN contribution at 250-870um would remove the need to invoke a top-heavy IMF for high-redshift starburst galaxies, although the excellent fit of the galaxy PLE model at shorter wavelengths would still need to be explained.
description: 14 pages, 11 figures; submitted to MNRAS
title: ÐÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ Ð²ÐµÐ±-Ð¿ÑÐ¸Ð»Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¾ Ð¿Ð¾Ð¸ÑÐºÑ ÑÑÐ°Ð¶Ð¸ÑÐ¾Ð²Ð¾Ðº Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Spring Boot Ð¸ Angular
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Designing and implementing an internship search web application based on Spring Boot and Angular
Creators: name: ÐÐ°ÑÐ¸ÐµÐ²Ð°, ÐÑÑÐ½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÐºÐ»Ð¸ÐµÐ½Ñ-ÑÐµÑÐ²ÐµÑ
Ð²ÐµÐ±-Ð¿ÑÐ¸Ð»Ð¾Ð¶ÐµÐ½Ð¸Ðµ
Spring Boot
Angular
Object-Relational Mapping
client-server
web-application

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð±ÑÐ»Ð¾ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð¾ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ðµ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ðµ ÑÑÐµÐ´ÑÑÐ² Ð¿Ð¾ Ð¿Ð¾Ð¸ÑÐºÑ ÑÐ°Ð±Ð¾ÑÑ, Ð³Ð´Ðµ Ð±ÑÐ»Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ ÑÐ»ÐµÐ´ÑÑÑÐ¸Ðµ ÑÐµÑÐ²Ð¸ÑÑ: Â«HeadHunter.ruÂ», Â«Rabota.ruÂ», Â«Avito.ruÂ», Â«SuperjobÂ». ÐÑÐ»Ð¸ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ñ ÐºÐ»Ð¸ÐµÐ½Ñ-ÑÐµÑÐ²ÐµÑÐ½ÑÐµ Ð°ÑÑÐ¸ÑÐµÐºÑÑÑÑ, Ð¼ÐµÑÐ¾Ð´Ñ Ð°ÑÑÐµÐ½ÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¸. ÐÑÐ»Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÑ Ð¸ ÑÑÐµÐ¹Ð¼Ð²Ð¾ÑÐºÐ¸ Ð´Ð»Ñ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ Ð¸ ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ. ÐÑÐ» Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð¾Ð±Ð·Ð¾Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ORM. ÐÑÐ»Ð¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÐµÑÐ²ÐµÑÐ½Ð°Ñ ÑÐ°ÑÑÑ, Ð±Ð°Ð·Ð° Ð´Ð°Ð½Ð½ÑÑ, Ð°Ð²ÑÐ¾ÑÐ¸Ð·Ð°ÑÐ¸Ñ Ð¸ Ð°ÑÑÐµÐ½ÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ñ. ÐÑÐ»Ð¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ñ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸Ñ Ðº ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾ÑÑÐ¸ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½ÑÐ¾Ð², Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÐºÐ¾ÑÐ¾ÑÑÑ Ð±ÑÐ»Ð¸ ÑÐ¾Ð·Ð´Ð°Ð½Ñ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½ÑÑ Angular Ð´Ð»Ñ ÐºÐ»Ð¸ÐµÐ½ÑÑÐºÐ¾Ð¹ ÑÐ°ÑÑÐ¸. ÐÑÐ»Ð° Ð¿ÑÐ¾Ð²ÐµÑÐµÐ½Ð° ÑÐ°Ð±Ð¾ÑÐ¾ÑÐ¿Ð¾ÑÐ¾Ð±Ð½Ð¾ÑÑÑ ÑÐ¾Ð·Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð²ÐµÐ±-Ð¿ÑÐ¸Ð»Ð¾Ð¶ÐµÐ½Ð¸Ñ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð·Ð°Ð¿ÑÐ¾ÑÐ¾Ð² Ð¸ Ð¼Ð¾Ð´ÑÐ»ÑÐ½Ð¾Ð³Ð¾ ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ, ÑÐ°ÐºÐ¶Ðµ Ð±ÑÐ»Ð° Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð° Ð°Ð¿ÑÐ¾Ð±Ð°ÑÐ¸Ñ Ð² ÑÐµÐ°Ð»ÑÐ½ÑÑ ÑÑÐ»Ð¾Ð²Ð¸ÑÑ.
description: In the given work, the current state of job search tools was analyzed, where the following services like: Â«HeadHunter.ruÂ», Â«Rabota.ruÂ», Â«Avito.ruÂ», Â«SuperjobÂ» were considered. Client-server architectures and authentication methods were investigated. Tools and frameworks for development and testing were considered. An ORM technology review was conducted. The server part, database, authorization and authentication were developed. The requirements for the functionality of the components were defined, on the basis of which Angular components were created for the client part. The operability of the created web application was checked using query testing and unit testing, and testing was also carried out in real conditions.
Specific features of the luminescence and conductivity of zinc selenide on exposure to X-ray and optical excitation
Creators: name: Degoda, V. Ya.
name: Sofienko, A. O.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences
subject: 82D37 (Primary) 78A10 (Secondary)

description: The set of experimental data on the X-ray-excited luminescence and X-ray induced conductivity of ZnSe are compared to the data on the photoluminescence and photoconductivity. It is experimentally established that the current-voltage characteristics and the kinetics of phosphorescence and current relaxation depend on the type of excitation. It is found that the external electric field influences the intensity and shape of bands in the luminescence spectra. It is shown that the character of excitation defines the kinetics of recombination, charge carrier trapping, and conductivity in wide-gap semiconductors.
description: 7 pages, 7 figures, published in Fizika i Tekhnika Poluprovodnikov, 2010, Vol. 44, No. 5, pp. 594-599
Additional file 3 of A meta-analysis study of the robustness and universality of gut microbiome-metabolome associations
Creators: name: Muller, Efrat
name: Algavi, Yadid M.
name: Borenstein, Elhanan
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Physiology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Inorganic Chemistry
subject: Computational Biology

description: Additional file 2: Supplementary Note 1. Alternative machine learning pipelines and effect on results. Supplementary Note 2. Comparisons to previous studies and validation. Supplementary Note 3. Metabolic pathways-oriented analysis of robustly well-predicted metabolites. Supplementary Note 4. Effect of excluding the infants dataset on robustness results.
The compact radio structure of radio-loud narrow line Seyfert 1 galaxies
Creators: name: Gu, Minfeng
name: Chen, Yongjun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the compact radio structure of three radio-loud narrow line Seyfert 1 galaxies from VLBA archive data at 2.3, 5 and 8.4 GHz. In RXS J16290+4007, the radio structure is mostly unresolved. The combination of compact radio structure, high brightness temperature and inverted spectrum between simultaneous 2.3 and 8.4 GHz, strongly favors jet relativistic beaming. Combining with the VLBI data at 1.6 and 8.4 GHz from literatures, we argued that RXS J16333+4718 may also harbor a relativistic jet, with resolved core-jet structure in 5 GHz. B3 1702+457 is clearly resolved with well defined jet component. The overall radio steep spectrum indicates that B3 1702+457 is likely a source optically defined as NLS1 with radio definition of compact steep spectrum sources. From these three sources, we found that radio loud NLS1s can be either intrinsically radio loud (e.g. B3 1702+457), or apparently radio loud due to jet beaming effect (e.g. RXS J16290+4007 and RXS J16333+4718).
description: 20 pages, 3 figures, accepted for publication in The Astronomical Journal
Dependence of Star Formation Activity On Stellar Mass and Environment From the Redshift One LDSS-3 Emission Line Survey (ROLES)
Creators: name: Li, I. H.
name: Glazebrook, Karl
name: Gilbank, David
name: Balogh, Michael
name: Bower, Richard
name: Baldry, Ivan
name: Davies, Greg
name: Hau, George
name: McCarthy, Pat
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the sample from the \it Redshift One LDSS3 Emission line Survey \rm (ROLES), we probe the dependence of star formation rate (SFR) and specific star formation rate (sSFR) as a function of stellar mass $M_*$ and environment as defined by local galaxy density, in the CDFS field. Our spectroscopic sample consists of 312 galaxies with $K_{AB}<24$, corresponding to stellar mass $\log(M_*/M_{\sun})>8.5$, and with [OII] derived star-formation rates SFR$>0.3M_{\sun}/$yr, at $0.889\leq z \leq 1.149$. The results have been compared directly with the Sloan Digital Sky Survey Stripe 82 sample at $0.032\leq z \leq 0.05$. For star-forming galaxies, we confirm that there is little correlation between SFR and density at $z\sim 0$. However, for the lowest mass galaxies in our $z\sim 1$ sample, those with $\log(M_*/M_{\sun})<10$, we find that both the median SFR and specific SFR {\it increase} significantly with increasing local density. The "downsizing" trend for low mass galaxies to be quenched progressively later in time appears to be more pronounced in moderately overdense environments. Overall we find that the evolution of star-formation in galaxies is most strongly driven by their stellar mass, with local galaxy density playing a role that becomes increasingly important for lower mass galaxies.
description: MNRAS accepted
On canonical transformations of gravitational variables in extended phase space
Creators: name: Shestakova, T. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Last years a certain attention was attracted to the statement that Hamiltonian formulations of General Relativity, in which different parametrizations of gravitational variables were used, may not be related by a canonical transformation. The example was given by the Hamiltonian formulation of Dirac and that of Arnowitt - Deser - Misner. It might witness for non-equivalence of these formulations and the original (Lagrangian) formulation of General Relativity. The problem is believed to be of importance since many authors make use of various representations of gravitational field as a starting point in searching a way to reconcile the theory of gravity with quantum principles. It can be shown that the mentioned above conclusion about non-equivalence of different Hamiltonian formulations is based on the consideration of canonical transformations in phase space of physical degrees of freedom only, while the transformations also involve gauge degrees of freedom. We shall give a clear proof that Hamiltonian formulations corresponding to different parametrizations of gravitational variables are related by canonical transformations in extended phase space embracing gauge degrees of freedom on an equal footing with physical ones. It will be demonstrated for the full gravitational theory in a wide enough class of parametrizations and gauge conditions.
description: 7 pages, talk presented at the International Conference "Modern problems of Gravitation, Cosmology and Relativistic Astrophysics", Moscow, 27 June - 3 July 2010
Simulation of linear non-Hermitian boundary-value problems with quantum singular value transformation
Creators: name: Novikau, I.
name: Dodin, I. Y.
name: Startsev, E. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We propose a quantum algorithm for simulating dissipative waves in inhomogeneous linear media as a boundary-value problem. Using the so-called quantum singular value transformation (QSVT), we construct a quantum circuit that models the propagation of electromagnetic waves in a one-dimensional system with outgoing boundary conditions. The corresponding measurement procedure is also discussed. Limitations of the QSVT algorithm are identified in connection with the large condition numbers that the dispersion matrices exhibit at weak dissipation.
Magnetic nanocomposites at microwave frequencies
Creators: name: Timonen, J. V. I.
name: Ras, R. H. A.
name: Ikkala, O.
name: Oksanen, M.
name: Seppala, E.
name: Chalapat, K.
name: Li, J.
name: Paraoanu, G. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Most conventional magnetic materials used in the electronic devices are ferrites, which are composed of micrometer-size grains. But ferrites have small saturation magnetization, therefore the performance at GHz frequencies is rather poor. That is why functionalized nanocomposites comprising magnetic nanoparticles (e.g. Fe, Co) with dimensions ranging from a few nm to 100 nm, and embedded in dielectric matrices (e.g. silicon oxide, aluminium oxide) have a significant potential for the electronics industry. When the size of the nanoparticles is smaller than the critical size for multidomain formation, these nanocomposites can be regarded as an ensemble of particles in single-domain states and the losses (due for example to eddy currents) are expected to be relatively small. Here we review the theory of magnetism in such materials, and we present a novel measurement method used for the characterization of the electromagnetic properties of composites with nanomagnetic insertions. We also present a few experimental results obtained on composites consisting of iron nanoparticles in a dielectric matrix.
description: 20 pages, 10 figures, 5 tables
TAIPAN Starbugs: Installing and commissioning at the UKST
Creators: name: Brown, Rebecca
name: None
Publisher: name: Zenodo
Year: 2019

description: The TAIPAN Starbugs are small cylindrical fibre optic positioning robots, currently installed in the UKST in the final stages of commissioning. Throughout the research and development of this new technology, a great deal has been learnt about the Starbugs. Some of the challenges and key learnings have been extremely valuable in the progression of the Starbugs in future projects.
Additional file 4 of A meta-analysis study of the robustness and universality of gut microbiome-metabolome associations
Creators: name: Muller, Efrat
name: Algavi, Yadid M.
name: Borenstein, Elhanan
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Physiology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Inorganic Chemistry
subject: Computational Biology

description: Additional file 3: Figure S1. Statistics about genera and metabolite features shared among datasets included in this meta-analysis. Figure S2. Comparisons to previous studies. Figure S3. Characteristics of robustly well-predicted metabolites. Figure S4. Comparisons of metabolite models between datasets. Figure S5. Examples of disease-independent robustly well-predicted metabolites. Figure S6. Transferability of metabolite models from controls to cases within the same study. Figure S7. Examples of significant contributors’ comparison between healthy and disease metabolite models. Figure S8. Comparison of different machine learning pipelines.
Colors of Inner Disk Classical Kuiper Belt Objects
Creators: name: Romanishin, W.
name: Tegler, S. C.
name: Consolmagno, G. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present new optical broadband colors, obtained with the Keck 1 and Vatican Advanced Technology telescopes, for six objects in the inner classical Kuiper Belt. Objects in the inner classical Kuiper Belt are of interest as they may represent the surviving members of the primordial Kuiper Belt that formed interior to the current position of the 3:2 resonance with Neptune, the current position of the plutinos, or, alternatively, they may be objects formed at a different heliocentric distance that were then moved to their present locations. The six new colors, combined with four previously published, show that the 10 inner belt objects with known colors form a neutral clump and a reddish clump in B-R color. Nonparametric statistical tests show no significant difference between the B-R color distribution of the inner disk objects compared to the color distributions of Centaurs, plutinos, or scattered disk objects. However, the B-R color distribution of the inner classical Kuiper belt objects does differ significantly from the distribution of colors in the cold (low inclination) main classical Kuiper belt. The cold main classical objects are predominately red, while the inner classical belt objects are a mixture of neutral and red. The color difference may reveal the existence of a gradient in the composition and /or surface processing history in the primordial Kuiper Belt, or indicate that the inner disk objects are not dynamically analogous to the cold main classical belt objects.
description: Accepted for publication in AJ
Experimental validation of the intensity refractometry principle for density measurements at the edge of a tokamak
Creators: name: Usoltseva, M.
name: Heuraux, S.
name: Faugel, H.
name: Bobkov, V.
name: Fünfgelder, H.
name: Grenfell, G.
name: Herrmann, A.
name: Khabibullin, I.
name: Tal, B.
name: Wagner, D.
name: Wendler, D.
name: Zeus, F.
name: Team, ASDEX Upgrade
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Experimental validation is presented for a new type of microwave diagnostic, first introduced in the theoretical study in M. Usoltceva et al., Rev. Sci. Instrum. 93, 013502 (2022). A new term is adopted for this technique to highlight its difference from interferometry: intensity refractometry. The diagnostic allows measuring electron density, and in this work, it is applied at the edge of a tokamak. The implementation of this technique at ASDEX Upgrade, called Microwave Intensity refractometer in the Limiter Shadow (MILS), provides the first experimental proof of the diagnostic concept. Densities predicted by MILS are compared to several other diagnostics. The agreement and discrepancy in various radial regions of the density profile are analyzed and possible reasons are discussed. A wide density coverage is shown in the example discharges with densities from 2*10^17 m^-3 to 2*10^19 m^-3 at the limiter position. In these experiments, the radial location of the measurements varied from 5 cm in front of the limiter (up to 1 cm inside the separatrix was measured) to 3 cm in the limiter shadow. Experimental challenges of MILS operation and data processing are presented.
Spectroscopy and kinematics of low-mass members of young moving groups
Creators: name: Galvez-Ortiz, M. C.
name: Clarke, J. R. A.
name: Pinfield, D. J.
name: Jenkins, J. S.
name: Folkes, S. L.
name: Perez, A. E. Garcia
name: Day-Jones, A. C.
name: Burningham, B.
name: Jones, H. R. A.
name: Barnes, J. R.
name: Pokorny, R. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study a target sample of 68 low-mass objects (with spectral types in the range M4.5-L1) previously selected via photometric and astrometric criteria, as possible members of five young moving groups: the Local Association (Pleiades moving group, age=20 - 150 Myr), the Ursa Mayor group (Sirius supercluster, age=300 Myr), the Hyades supercluster (age=600 Myr), IC 2391 supercluster (age=35 - 55 Myr) and the Castor moving group (age=200 Myr). In this paper we assess their membership by using different kinematic and spectroscopic criteria. We use high resolution echelle spectroscopic observations of the sample to measure accurate radial velocities (RVs). Distances are calculated and compared to those of the moving group from the literature, we also calculate the kinematic Galactic components (U,V,W) of the candidate members and apply kinematic criterion of membership to each group. In addition we measure rotational velocities (v sin i) to place further constraints on membership of kinematic members. We find that 49 targets have young disk kinematics and that 36 of them possibly belong to one of our five moving groups. From the young disk target ob jects, 31 have rotational velocities in agreement with them belonging to the young disk population. We also find that one of our moving group candidates, 2MASS0123- 3610, is a low-mass double lined spectroscopic binary, with probable spectral types around M7.
description: 16 pg, 5 figures
What triggers high-redshift starbursts ? New insights from their dust-attenuation
Creators: name: Calabró, Antonello
name: None
Publisher: name: Zenodo
Year: 2019

description: A long standing problem in galaxy evolution is whether high-redshift starbursts (selected by their SFR(IR) excess compared to the star-forming Main Sequence) are gas rich galaxies driven by stochastic accretion events, or rather merger systems, in which the infalling gas is consumed at higher star-formation efficiency compared to normal galaxies, as seen in local ULIRGs. In our first published work, we found from a statistical sample of 25 Herschel-detected starbursts at z ~ 0.7 in COSMOS field that their dust attenuation pattern (derived by comparing Paβ, Hα and bolometric IR luminosities) is consistent with an optically thick mixed model with average total optical depth of 9 magnitudes in V band. The presence of highly embedded cores and their disturbed morphology strongly favours a merger-induced starburst scenario at high redshift. Our starbursts also define a one-parameter sequence: we will show, indeed, that they follow relatively tight correlations between total obscuration, emission line ionisation, starburst core size and effective age (as traced by line EWs), which can be interpreted as a time-evolutionary sequence of merger stages. Intriguingly, X-ray emission is detected only for a subset of later-stage mergers, suggesting emergent AGNs leading to a final bright QSO.
The geometry of nonlinear least squares with applications to sloppy models and optimization
Creators: name: Transtrum, Mark K.
name: Machta, Benjamin B.
name: Sethna, James P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Parameter estimation by nonlinear least squares minimization is a common problem with an elegant geometric interpretation: the possible parameter values of a model induce a manifold in the space of data predictions. The minimization problem is then to find the point on the manifold closest to the data. We show that the model manifolds of a large class of models, known as sloppy models, have many universal features; they are characterized by a geometric series of widths, extrinsic curvatures, and parameter-effects curvatures. A number of common difficulties in optimizing least squares problems are due to this common structure. First, algorithms tend to run into the boundaries of the model manifold, causing parameters to diverge or become unphysical. We introduce the model graph as an extension of the model manifold to remedy this problem. We argue that appropriate priors can remove the boundaries and improve convergence rates. We show that typical fits will have many evaporated parameters. Second, bare model parameters are usually ill-suited to describing model behavior; cost contours in parameter space tend to form hierarchies of plateaus and canyons. Geometrically, we understand this inconvenient parametrization as an extremely skewed coordinate basis and show that it induces a large parameter-effects curvature on the manifold. Using coordinates based on geodesic motion, these narrow canyons are transformed in many cases into a single quadratic, isotropic basin. We interpret the modified Gauss-Newton and Levenberg-Marquardt fitting algorithms as an Euler approximation to geodesic motion in these natural coordinates on the model manifold and the model graph respectively. By adding a geodesic acceleration adjustment to these algorithms, we alleviate the difficulties from parameter-effects curvature, improving both efficiency and success rates at finding good fits.
description: 40 pages, 29 Figures
Opinion formation models with extreme switches and disorder: critical behaviour and dynamics
Creators: name: Biswas, Kathakali
name: Sen, Parongama
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In a three state kinetic exchange opinion formation model, the effect of extreme switches was considered in a recent paper. In the present work, we study the same model with disorder. Here disorder implies that negative interactions may occur with a probability $p$. In absence of extreme switches, the known critical point is at $p_c =1/4$ in the mean field model. With a nonzero value of $q$ that denotes the probability of such switches, the critical point is found to occur at $ p = \frac{1-q}{4}$ where the order parameter vanishes with a universal value of the exponent $β=1/2$. Stability analysis of initially ordered states near the phase boundary reveals the exponential growth/decay of the order parameter in the ordered/disordered phase with a timescale diverging with exponent $1$. The fully ordered state also relaxes exponentially to its equilibrium value with a similar behaviour of the associated timescale. Exactly at the critical points, the order parameter shows a power law decay with time with exponent $1/2$. Although the critical behaviour remains mean field like, the system behaves more like a two state model as $q \to 1$. At $q=1$ the model behaves like a binary voter model with random flipping occurring with probability $p$.
description: 7 pages, 7 figures
IllustrisTNG simulations: Chemical pre-processing of star-forming cluster galaxies over the past 10 billion years
Creators: name: Gupta, Anshu
name: None
Publisher: name: Zenodo
Year: 2019

description: Large-scale cluster potential is known to plays a significant role in the morphological and colour transformation of galaxies. However, the effect of environment on gas-phase chemical abundance remains observationally inconclusive. The new generation of cosmological simulations are ideal laboratory to test and make prediction about physical drivers of chemical evolution in high density environment. In this talk, I will present my work with IllustrisTNG simulations, where I find that cluster galaxies at z<1.5 are systematically 0.10-0.15 dex metal rich compared to field galaxies, particularly for the stellar mass <10^10 Msun. Our analysis predicts a systematic signature of ``chemical pre-processing'', i.e., signs of metallicity enhancement appear before galaxies fall into the central cluster potential. Using tracer particles, we identify that the inflow of enriched gas and reduced gas inflow rates drives the chemical evolution of galaxies destined to be in the high density environment.
Bound particle coupled to two thermostats
Creators: name: Fogedby, Hans C.
name: Imparato, Alberto
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a harmonically bound Brownian particle coupled to two distinct heat reservoirs at different temperatures. We show that the presence of a harmonic trap does not change the large deviation function from the case of a free Brownian particle discussed by Derrida and Brunet and Visco. Likewise, the Gallavotti-Cohen fluctuation theorem related to the entropy production at the heat sources remains in force. We support the analytical results with numerical simulations.