cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Three-dimensional mid-infrared photonic circuits in chalcogenide glass
Creators: name: Rodenas, Airan
name: Martin, Guillermo
name: Arezki, Brahim
name: Psaila, Nicholas D.
name: Jose, Gin
name: Jha, Animesh
name: Labadie, Lucas
name: Kern, Piern
name: Kar, Ajoy K.
name: Thomson, Robert R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report the fabrication of single mode buried channel waveguides for the whole mid-infrared transparency range of chalcogenide sulphide glasses by means of direct laser writing. We have explored the potential of this technology by fabricating a prototype three-dimensional three-beam combiner for future application in stellar interferometry, which delivers a monochromatic interference visibility of 99.89% at 10.6 \mum, and an ultrahigh bandwidth (3-11 \mum) interference visibility of 21.3%. These results demonstrate that it is possible to harness the whole transparency range offered by chalcogenide glasses on a single on-chip instrument by means of direct laser writing, a finding that may be of key significance in future technologies such as astrophotonics and biochemical sensing.
description: 3 pages, 4 figures, article submitted to Optics Letters on the 14th of November 2011
Training And Education Provided By Microbial Culture Collections In Europe (Ii): Overview On Current Demand And Needs Of Customers Of The Mirri Consortium
Creators: name: Antunes, André
name: Piessens, Verle
name: Zuzuarregui, Aurora
name: Perugini, Iolanda
name: Fischer-Le Saux, Marion
name: Helloin, Emmanuelle
name: Lima, Nelson
name: Consortium, The MIRRI
Publisher: name: Zenodo
Year: 2014
Subjects: MIRRI
training & education
knowledge transfer
microorganisms

description: The currently ongoing boom in the bioeconomy is fueled by Biolgical Resource Centers, which play a vital role in harnessing and preserving the world's biodiversity. MIRRI is an EU-ESFRI project involving a total of 33 partners and collaborating parties, aiming to provide facilitated accesss to microbial resources, associated data and expertise, and promote knowledge transfer and foster innovation. In order to achive these goals, it is crucial to properly define our stakeholder community and identify their current and future needs.

MIRRI conducted a wide-scoped survey targeting current and potential users of microbial resourcec and services. The survey aimed to identify trends in current and future demand and needs for our services, and pinpoint possible gaps in our offer. It also included a specific section on education and training. Replies from a total of 1146 individual users were collected and further examined, procesed and analyzed.

Here we present and analyze some of the results of this survey, focusing on training and education. We identified a much wider untapped market for education and training within our customer base, which is expected to expand in the next five years. The expected spike in demand of training from culture collections is particularly pronounced in replies from the profit sector.

One should not that the additional efforts are clearly required in adjusting our offer, adapting contents and content delivery and focusing on cost-efficency and proper advertising to increase visibility, harness this potential growth, and better serve the needs of our customers.
Zur Verbreitung der Messingeimer vom Hemmoorer Typus
Creators: name: Werner, Joachim
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 153 (1953): Bonner Jahrbücher des Vereins von Altertumsfreunden im Rheinlande und des Rheinischen Provinzialmuseums in Bonn
Reactivity trends for mechanochemical reductive coupling of aryl iodides
Creators: name: Carson, Courtney
name: Hassing, Joshua
name: Olguin, Trinity
name: Peterson, Karl P.
name: Haley, Rebecca A.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Neuroscience
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified

description: Reductive coupling reactions are a facile and versatile way to make carbon – carbon bonds. However, most methods within this class of reactions makes use of reprotoxic, amide-based solvents. Mechanochemistry, a method that does not always require solvent, has been used for reductive coupling methods but still reports the use of at least some amide-based solvent for productive outcomes. This work presents the reactivity trends for the reductive homocoupling of aryl iodides when using various amounts of N,N-dimethylformamide (a commonly used amide-based solvent) and dimethyl carbonate (a greener alternative). The results of these experiments show that dimethyl carbonate may be used in sub-stoichiometric amounts with equal or greater efficiency to N,N-dimethyl formamide. Further, cross-electrophile coupling (XEC) is explored with various solvents, showing that N-butyl pyrrolidinone is efficient as a liquid assisted grinding solvent. These experiments show that under mechanochemical conditions, safer solvents are able to be used with no loss of efficacy for reductive coupling reactions.
Karl Nass, Die Nordgrenze der Urnenfelderkultur in Hessen
Creators: name: Uslar, Rafael Von
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Karl Nass, Die Nordgrenze der Urnenfelderkultur in Hessen. Kurhessische Bodenaltertümer, hrsg. von O. Unze, Heft II, 1—2. Marburg (Kommissionsverlag N. G.-Elwert) 1952. 85 Seiten mit 22 Tafeln und 1 Karte.
description: Bonner Jahrbücher, Bd. 153 (1953): Bonner Jahrbücher des Vereins von Altertumsfreunden im Rheinlande und des Rheinischen Provinzialmuseums in Bonn
DNA restriction fragment patterns and the origin of stellaria longipes (caryophyllaceae)
Creators: name: Muhammad, Nasreen
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: QK 495 C24 M83 1991
subject: Caryophyllaceae
subject: Plant cytogenetics
subject: Stellaria - Cytogenetics
subject: DNA - Analysis

description: Bibliography: p. 164-173.
CRAFT-OA Creating a Robust Accessible Federated Technology for Open Access
Creators: name: Bargheer, Margo
Publisher: name: Zenodo
Year: 2023
Subjects: Open Science
Diamond Open Access

description: This presentation was given at the "Coordination Meeting of EOSC-related Projects Under Horizon Europe" in Brussels, 15-16 June 2023. The presentation gives an overview of the targets, the structure, & the outputs of the CRAFT-OA project that has started in January 2023.
Method development and validation of Atorvastatin, Ezetimibe and Fenofibrate using RP-HPLC along with their forced degradation studies and greenness profiling
Creators: name: Sukumar, Viswanathan
name: Chinnusamy, Saravanan
name: Chanduluru, Hemanth Kumar
name: Rathinam, Seetharaman
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biophysics
Space Science
Medicine
Cell Biology
Biotechnology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Science Policy

description: The present study aimed to separate the three-drug combination and degradant products by applying stress studies in bulk and pharmaceutical using RP-HPLC green analytical chemistry principles to make the separation better and more effective without compromising the standard limits. The three drugs have separated using the Mobile Phase Mixture of 10 volumes of buffer (0.1% triethanolamine in water) and 90 volumes of ethanol on the stationary phase Inertsil ODS 3 (250 mm x 4.6 mm), 5 µm column, at a wavelength of 256 nm. The method has been performed on a linear concentration range of 12–28 µg/mL for ATR, EZB, and 192- 448 µg/mL for FNF. The forced degradation studies showed that the ATR had > 5% degradation in acid, peroxide and thermal degradation, as EZB tends to degrade more than 15% at alkali hydrolysis. Moreover, the methodology has been validated according to ICH Q2 R1 guidelines, assessed using green evaluation tools like GAPI, AES, and AGREE, and found eco-friendly according to the output of the greenness outcomes. The developed method employed for determining three drugs has shown within limits according to the guidelines, easily adaptable by the pharmaceutical industries for their regular quality control analysis of the combinations.
A Model for Web Page Usage Mining Based on Segmentation
Creators: name: Kuppusamy, K. S.
name: Aghila, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.3.3
subject: 68P20

description: The web page usage mining plays a vital role in enriching the page's content and structure based on the feedbacks received from the user's interactions with the page. This paper proposes a model for micro-managing the tracking activities by fine-tuning the mining from the page level to the segment level. The proposed model enables the web-master to identify the segments which receives more focus from users comparing with others. The segment level analytics of user actions provides an important metric to analyse the factors which facilitate the increase in traffic for the page. The empirical validation of the model is performed through prototype implementation.
Microtubules Interacting with a Boundary: Mean Length and Mean First-Passage Times
Creators: name: Mulder, Bela M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Mathematical Physics (math-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We formulate a dynamical model for microtubules interacting with a catastrophe-inducing boundary. In this model microtubules are either waiting to be nucleated, actively growing or shrinking, or stalled at the boundary. We first determine the steady-state occupation of these various states and the resultant length distribution. Next, we formulate the problem of the Mean First-Passage Time to reach the boundary in terms of an appropriate set of splitting probabilities and conditional Mean First-Passage Times, and solve explicitly for these quantities using a differential equation approach. As an application, we revisit a recently proposed search-and-capture model for the interaction between microtubules and target chromosomes [Gopalakrishnan & Govindan, Bull. Math. Biol. 73:2483--506 (2011)]. We show how our approach leads to a direct and compact solution of this problem.
Synthesis of digital signal processing systems using pipelined bit-serial arithmetic
Creators: name: Nagalla, Radhakrishna
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: TK 5102.5 N34 1991
subject: Signal processing - Digital techniques
subject: Digital electronics
subject: Integrated circuits - Very large scale integration - Design and construction
subject: Computer architecture

description: Bibliography: p. 121-124.
An interpretive study of multicomponent seismic data from the Carrot Creek area of west-central Alberta
Creators: name: Nazar, Brad
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: QE 471.15 C6 N39 1991a
subject: Additional Copy: QE 471.15 C6 N39 1991
subject: Conglomerate - Alberta - Carrot Creek Region
subject: Geology - Alberta - Carrot Creek Region

description: Bibliography: p. 99-103.
Improved description of $^{34,36,46}$Ar(p,d) transfer reactions
Creators: name: Nunes, F. M.
name: Deltuva, A.
name: Hong, June
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: An improved description of single neutron stripping from $^{34,36,46}$Ar beams at 33 MeV/nucleon by a hydrogen target is presented and the dependence on the neutron-proton asymmetry of the spectroscopic factors is further investigated. A finite range adiabatic model is used in the analysis and compared to previous zero range and local energy approximations. Full three-body Faddeev calculations are performed to estimate the error in the reaction theory. In addition, errors from the optical potentials are also evaluated. From our new spectroscopic factors extracted from transfer, it is possible to corroborate the neutron-proton asymmetry dependence reported from knockout measurements.
description: 7 pages, 3 figures
Town of Didsbury period restoration and downtown revitalization study
Creators: name: Nicolai, Andrei
Publisher: name: Environmental Design
Year: 1991
Subjects: subject: NA 109 C3 N53 1991
subject: Architecture - Alberta - Didsbury - Conservation and restoration
subject: Didsbury (Alta.) - Buildings, structures, etc. - Repair and reconstruction
subject: Historic buildings - Alberta - Didsbury - Conservation and restoration

description: Bibliography: p. 77-81.
Gigacount/second photon detection with InGaAs avalanche photodiodes
Creators: name: Patel, K. A.
name: Dynes, J. F.
name: Sharpe, A. W.
name: Yuan, Z. L.
name: Penty, R. V.
name: Shields, A. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We demonstrate high count rate single photon detection at telecom wavelengths using a thermoelectrically-cooled semiconductor diode. Our device consists of a single InGaAs avalanche photodiode driven by a 2 GHz gating frequency signal and coupled to a tuneable self-differencing circuit for enhanced detection sensitivity. We find the count rate is linear with the photon flux in the single photon detection regime over approximately four orders of magnitude, and saturates at 1 gigacount/s at high photon fluxes. This result highlights promising potential for APDs in high bit rate quantum information applications.
description: Electronics Letters (2012)
Putting the squeeze on imine synthesis: citrus juice as a reaction medium in the introductory organic laboratory
Creators: name: Nigam, Manisha
name: Tuttle, Dylan
name: Morra, Barbora
name: Dicks, Andrew P.
name: Rodriguez, Jose
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Plant Biology
subject: FOS: Biological sciences

description: A less hazardous and energy efficient reaction performed using freshly squeezed citrus juice as solvent has been designed and implemented within a sophomore level organic chemistry laboratory. The primary learning objectives are to enable students to (i) identify and reflect upon various green chemistry principles such as waste prevention, atom economy, less hazardous synthesis, use of safer chemicals, catalysis, design for energy efficiency, and inherently safer chemistry for accident prevention; (ii) use proton NMR spectroscopic data to characterize a synthesized Schiff base (imine); and (iii) describe the reaction mechanism for imine formation, including the reasoning for why citrus juice is an excellent reaction medium. Specifically, 4-nitrobenzaldehyde is combined with 4-methoxyaniline at room temperature in the presence of four different fruit juices as reaction media to successfully synthesize an imine that is expensive to procure commercially. This is followed by students undertaking reduction of the imine to form a secondary amine which has a dramatically distinct color due to the disruption in conjugation. In performing this overall reductive amination, students expand their knowledge on acid-catalyzed imine synthesis and its mechanism, strengthen their practical skills in the laboratory, and reflect on green chemistry principles within the context of fundamental organic reactivity.
Development and testing of two towed volumetric hydrophone array prototypes to improve localization accuracy during shipboard line-transect cetacean surveys.
Creators: name: Barkley, Yvonne
name: Barlow, Jay
name: Rankin, Shannon
name: D'Spain, Gerald L.
name: Oleson, Erin M. (Erin Marie), 1977-
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Pacific Islands Fisheries Science Center.
Year: 2016
Subjects: subject: Hydrophone--Design and construction--Testing.
subject: Underwater acoustics--Instruments--Testing.
subject: Cetacea--Detection--Equipment and supplies.

description: Passive acoustic monitoring (PAM) of cetaceans using towed hydrophone arrays is a principle component of shipboard cetacean population surveys conducted by the National Marine Fisheries Service (NMFS). The traditional array design used by the NMFS includes a linear configuration of hydrophones housed inside a castor oil-filled polyurethane tube that is towed behind the ship while traveling at approximately 10 knots. Linear arrays are excellent tools to detect vocal cetacean groups and estimate their location during real-time operations. Conical bearing estimates are obtained using the time difference of arrival (TDOA) between individual cetacean sounds on two hydrophones in a linear array. Once bearings to the animals converge relative to the ship, a perpendicular distance estimate from the transect line to the animals can be determined (Rankin et al., 2008). Depending on the circumstances, the acousticians may then direct the ship to turn in order to guide the visual observers to the location of the animals. However, acoustic tracking can be challenging due to the limitations of the bearing information from the linear array. The convergence of conical bearing angles cannot discriminate between signals originating from left, right, up or down. For dolphins that primarily vocalize in surface waters, the up/down ambiguity is not a large concern, but the left/right ambiguity often requires more ship time to determine the correct location of the animals. For deep-diving species like beaked whales, the ambiguity in declination angle can result in a biased estimate of their perpendicular distance from the transect line (when projected to the surface). A more efficient and precise localization method would offer better results and more accurate data for several cetacean species.
B!SON – A Recommendation System for Open Access Journals: Sustainability, Long-Term Operation and Further Development
Creators: name: Eppelin, Anita
name: Entrup, Elias
name: Tullney, Marco
Publisher: name: Zenodo
Year: 2023
Subjects: open access
open access journals
scientific publishing
recommendation system
journal recommender

description: B!SON, the recommendation system for Open Access journals, will continue to be made available free of charge by the Technische Informationsbibliothek (TIB) after the end of the project funding (January 31, 2023). The TIB aims to operate B!SON on a permanent basis. It guarantees its availability, including updates and support, for at least five years. In order to partially compensate for the costs of operation, a model is then being sought, for instance on the basis of voluntary membership contributions by institutions or individuals. Institutions interested in using B!SON locally, for example to supplement their publication advisory services, are supported. The source code of the recommendation system is available as free software in order to enable subsequent use, improvement and further development. Building on the underlying technologies of the recommendation system -- semantically and bibliometrically based similarity determination of scientific texts -- the partners are striving for further project projects that serve the overarching goal of supporting scholar-led Open Access publishing. The document describes how the sustainable availability of the B!SON service is to be achieved and what approaches exist for further development of the tool. A German version of this document is available under https://doi.org/10.5281/zenodo.8033936.
description: This work is funded by the Federal Ministry of Education and Research (BMBF), Germany, funding reference: 16TOA034A.
In situ fourier transform infrared spectroelectrochemical studies of the oxidation of some octaethylporphyrin complexes
Creators: name: Olorunyolemi, Temitayo O.
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: QP 671 P6 O56 1991
subject: Porphyrin and porphyrin compounds
subject: Fourier transform infrared spectroscopy

description: Bibliography: p. 103-110.
DN interaction from the Juelich meson-exchange model
Creators: name: Tolos, L.
name: Haidenbauer, J.
name: Krein, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The $DN$ interaction is studied in close analogy to the meson-exchange $\bar KN$ potential of the Juelich group using SU(4) symmetry constraints. The model generates the $Λ_c$(2595) resonance dynamically as a $DN$ quasi-bound state. Results for $DN$ scattering lengths and cross sections are presented and compared with predictions based on the Weinberg-Tomozawa term. Some features of the $Λ_c$(2595) resonance are also discussed emphasizing the role of the near-by $πΣ_c$ threshold.
description: 3 pages, 3 figures, contribution to the proceedings of the 19th Particles and Nuclei International Conference (PANIC11), Cambridge, Massachusetts, July 24th-29th, 2011
Beliefs about academic competence and academic intrinsic motivation within specific school subjects: a comparison between learning-disabled and average achieving students
Creators: name: Pain, Karen J. (Karen Judith), 1958-
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: LB 3605 P34 1991
subject: Students - Self-rating of
subject: Learning disabled - Attitudes
subject: Students - Attitudes

description: Bibliography: p. 168-184.
Non-negatively curved 5-manifolds with almost maximal symmetry rank
Creators: name: Galaz-Garcia, Fernando
name: Searle, Catherine
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C20

description: We show that a closed, simply-connected, non-negatively curved 5-manifold admitting an effective, isometric $T^2$ action is diffeomorphic to one of $S^5$, $S^3\times S^2$, $S^3\tilde{\times} S^2$ (the non-trivial $S^3$-bundle over $S^2$) or the Wu manifold $SU(3)/SO(3)$.
description: We fix an omission in a previous posting (arXiv:0906.3870v1 [math.DG])
Abelian symmetries in multi-Higgs-doublet models
Creators: name: Ivanov, Igor P.
name: Keus, Venus
name: Vdovin, Evgeny
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Classifying symmetry groups which can be implemented in the scalar sector of a model with $N$ Higgs doublets is a difficult and an unsolved task for $N>2$. Here, we make the first step towards this goal by classifying the Abelian symmetry groups. We describe a strategy that identifies all Abelian groups which can be realized as symmetry groups of the NHDM scalar potential. We give examples of the use of this strategy in 3HDM and 4HDM and prove several statements for arbitrary $N$.
description: Talk given at the 47th Rencontres de Moriond Electroweak session 2012, 4 pages
"Auf dem Flusse" Franz Schuberts Winterreise / Analyse
Creators: name: Peter Oberosler
Publisher: name: Zenodo
Year: 2023

description: Term paper for the seminar: Epochen III: Die Lieder Franz Schuberts, University Innsbruck / Musicology / WS 2013/14;
Lecturer: Prof. Dr. Federico Celestini / Speaker: Peter Oberosler;
Topic: Franz Schubert / Winterreise;
A Temporal Neuro-Fuzzy Monitoring System to Manufacturing Systems
Creators: name: Mahdaoui, Rafik
name: Mouss, Leila Hayet
name: Mouss, Mohamed Djamel
name: Chouhal, Ouahiba
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Fault diagnosis and failure prognosis are essential techniques in improving the safety of many manufacturing systems. Therefore, on-line fault detection and isolation is one of the most important tasks in safety-critical and intelligent control systems. Computational intelligence techniques are being investigated as extension of the traditional fault diagnosis methods. This paper discusses the Temporal Neuro-Fuzzy Systems (TNFS) fault diagnosis within an application study of a manufacturing system. The key issues of finding a suitable structure for detecting and isolating ten realistic actuator faults are described. Within this framework, data-processing interactive software of simulation baptized NEFDIAG (NEuro Fuzzy DIAGnosis) version 1.0 is developed. This software devoted primarily to creation, training and test of a classification Neuro-Fuzzy system of industrial process failures. NEFDIAG can be represented like a special type of fuzzy perceptron, with three layers used to classify patterns and failures. The system selected is the workshop of SCIMAT clinker, cement factory in Algeria.
description: 10 pages, 11 figures, IJCSI International Journal of Computer Science Issues, Vol. 8, Issue 3, No. 1, May 2011 ISSN (Online): 1694-0814 www.IJCSI.org
RF measurements I: signal receiving techniques
Creators: name: Caspers, F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: For the characterization of components, systems and signals in the RF and microwave range, several dedicated instruments are in use. In this paper the fundamentals of the RF-signal sampling technique, which has found widespread applications in 'digital' oscilloscopes and sampling scopes, are discussed. The key element in these front-ends is the Schottky diode which can be used either as an RF mixer or as a single sampler. The spectrum analyser has become an absolutely indispensable tool for RF signal analysis. Here the front-end is the RF mixer as the RF section of modern spectrum analysers has a rather complex architecture. The reasons for this complexity and certain working principles as well as limitations are discussed. In addition, an overview of the development of scalar and vector signal analysers is given. For the determination of the noise temperature of a one-port and the noise figure of a two-port, basic concepts and relations are shown. A brief discussion of commonly used noise measurement techniques concludes the paper.
description: 24 pages, contribution to the CAS - CERN Accelerator School: Specialised Course on RF for Accelerators; 8 - 17 Jun 2010, Ebeltoft, Denmark
Local government development planning for Alberta 'No longer new' towns: case study of the Swan Hills colloquium
Creators: name: Paul, Satwinder Jeet
Publisher: name: Environmental Design
Year: 1991
Subjects: subject: JS 1724 S93 P38 1993
subject: Local government - Alberta - Swan Hills
subject: Swan HIlls (Alta.) - Politics and government

description: Bibliography: p. 142-147.
Characterizing a fiber-based frequency comb with electro-optic modulator
Creators: name: Zhang, W.
name: Lours, M.
name: Fischer, M.
name: Holzwarth, R.
name: Santarelli, G.
name: Coq, Y. Le
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report on the characterization of a commercial-core fiber-based frequency comb equipped with an intracavity electro-optic modulator (EOM). We investigate the relationship between the noise of the pump diode and the laser relative intensity noise (RIN) and demonstrate the use of a low noise current supply to substantially reduce the laser RIN. By measuring several transfer functions, we evaluate the potentiality of the EOM for comb repetition rate stabilization. We also evaluate the coupling to other relevant parameters of the comb. From these measureemnts, we infer the capabilities of the femtosecond laser comb to generate very low phase noise microwave signals when phase locked to a high spectral purity ultra-stable laser.
description: Submitted to IEEE UFFC Special issue
Survey of H-alpha emission from thirty nearby dwarf galaxies
Creators: name: Kaisin, S. S.
name: Karachentsev, I. D.
name: Kaisina, E. I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Measurements of the H-alpha flux from 30 neighboring dwarf galaxies are presented. After correction for absorption, these fluxes are used to estimate the star formation rate (SFR). The SFR for 18 of the galaxies according to the H-alpha emission are compared with estimates of the SFR from FUV magnitudes obtained with the GALEX telescope. These are in good agreement over the range log[SFR] = [-3,0]M sun/yr.
description: 18 pages, 10 figures, 3 tables
"The Waiting room": a written accompaniment to the thesis exhibition
Creators: name: Woodward, Sian Piper
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: ND 249 W68 W66 1991
subject: Artists - Canada - Exhibitions
subject: Woodward, Sian Piper - Exhibitions

description: Bibliography: p. 47-49.
description: The following paper is in support of the Master of Fine Arts Thesis Exhibition at the Nickle Arts Museum, The University of Calgary, September 6th, 1991. The exhibition contains an installation and various mixed media works. The paper will discuss component parts of the Thesis Exhibition, possible associations the works may have, along with the sources from which the works are derived. These sources include artists who have made reference to or derived their work from occult interests such as magic and alchemy, the history of the occult, the integration of magic into daily life in certain cultures, and superstition and ritual. I have chosen to make reference in my visual art work to these various sources because I feel they in one way or another deal with death and the acceptance of death. The visual art work that will be in the Nickle Arts Museum refers to death on many levels; physical, emotional and spiritual.
Hubble Space Telescope survey of the Perseus Cluster -IV: Compact stellar systems in the Perseus Cluster core and Ultra Compact Dwarf formation in star forming filaments
Creators: name: Penny, Samantha J.
name: Forbes, Duncan A.
name: Conselice, Christopher J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the results of the first search for Ultra Compact Dwarfs (UCDs) in the Perseus Cluster core, including the region of the cluster around the unusual Brightest Cluster Galaxy (BCG) NGC 1275. Utilising Hubble Space Telescope Advanced Camera for Surveys imaging, we identify a sample of 84 UCD candidates with half-light radii 10 pc < r_e < 57 pc out to a distance of 250 kpc from the cluster centre, covering a total survey area of ~70 armin^2. All UCDs in Perseus lie in the same size-luminosity locus seen for confirmed UCDs in other regions of the local Universe. The majority of UCDs are brighter than M_R = -10.5, and lie on an extrapolation of the red sequence followed by the Perseus Cluster dwarf elliptical population to fainter magnitudes. However, three UCD candidates in the vicinity of NGC 1275 are very blue, with colours (B-R)_0 < 0.6 implying a cessation of star formation within the past 100 Myr. Furthermore, large blue star clusters embedded in the star forming filaments are highly indicative that both proto-globular clusters (GCs) and proto-UCDs are actively forming at the present day in Perseus. We therefore suggest star forming filaments as a formation site for some UCDs, with searches necessary in other low redshift analogues of NGC 1275 necessary to test this hypothesis. We also suggest that tidal disruption of dwarf galaxies is another formation channel for UCD formation in the core of Perseus as tidal disruption is ongoing in this region as evidenced by shells around NGC 1275. Finally, UCDs may simply be massive GCs based on strong similarities in the colour trends of the two populations.
description: 18 pages, 20 figures, 3 tables. Accepted for publication in MNRAS
A Design for a daylit energy efficient building
Creators: name: Wournell, Douglas Mark
Publisher: name: Environmental Design
Year: 1991
Subjects: subject: NA 2794 W68 1991
subject: Daylighting
subject: Architecture and energy conservation

description: Bibliography: p. 40-42.
description: Daylighting was investigated as a strategy for achieving energy-efficiency in a hypo­thetical small multi-functional building situated in downtown Calgary. The two part hypothesis stated that energy-efficiency could be achieved without minimizing the building's volume to surface area ratio and that daylighting could increase energy-efficiency. The project involved the comparison of four designs that were based on the architectural programme. Three of these buildings had articulated massings, while the fourth had a massing with a low volume to surface area ratio. Computer simulations were used to examine the effects of massing,. glazing, and daylighting strategies on energy­efficiency. The findings were applied in the design of an energy efficient daylit building.
Study of Resistive Micromegas in a Mixed Neutron and Photon Radiation Field
Creators: name: Iakovidis, Georgios
name: Alexopoulos, Theodoros
name: Tsipolitis, Georgios
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Muon ATLAS Micromegas Activity (MAMMA) focuses on the development and testing of large-area muon detectors based on the bulk-Micromegas technology. These detectors are candidates for the upgrade of the ATLAS Muon System in view of the luminosity upgrade of Large Hadron Collider at CERN (sLHC). They will combine trigger and precision measurement capability in a single device. A novel protection scheme using resistive strips above the readout electrode has been developed. The response and sparking properties of resistive Micromegas detectors were successfully tested in a mixed (neutron and gamma) high radiation field supplied by the Tandem accelerator, at the N.C.S.R. Demokritos in Athens. Monte-Carlo studies have been employed to study the effect of 5.5 MeV neutrons impinging on Micromegas detectors. The response of the Micromegas detectors on the photons originating from the inevitable neutron inelastic scattering on the surrounding materials of the experimental facility was also studied.
H-DNA and d(TC)n binding proteins
Creators: name: Yee, Harris A.
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: QP 551 Y43 1991
subject: Protein binding
subject: Proteins - Affinity labeling

description: Bibliography: p. 133-143.
description: Repetitive d(TC)n tracts have been shown in vitro to adopt an unusual DNA conformation, H-DNA. H-DNA is an intramolecular triplex favored to form in sequences with mirror symmetry and having either a homopurine and /or homopyrmidine strand bias. These d(TC)n tracts are prevalently found in eukaryotic genomes. Specifically, these sequences have been isolated in the regulatory regions of genes, sites of recombination and origins of replication. Many biological roles have been proposed and a putative role in transcription has been demonstrated. The adventitious multi-functional aspect of this sequence strongly suggests a more global role in the structure and function relationship, such as in the organization of chromatin and the nuclear matrix. If these sequences have biological functions in the cell, the question is whether these functions include the formation of triple stranded structures. Two d(TC)n·d(GA)n bearing plasmids, pTClS and pTC32 have been constructed to examine the relationships between superhelical density, protonation and insert size in the context of H-DNA formation. The former plasmid contains a synthetic d(TC)is insert and the latter plasmid contains a synthetic d(TCh2 insert. Two dimensional topoisomer electrophoretic analysis is a useful and powerful techique for examining thermodynamically stable transitions. From these results, thermodynamic parameters were calculated. The formation of H-DNA for d(TC)n sequences is favored under acidic conditions and is length dependent. The pattern of Sl nuclease activity for pTC15 was consistent with H-DNA and for pTC32 was not consistent with a single or predominant conformer of H-DNA but a mixed population of conformers. A natural sequence with a polypyrmidine strand bias derived from mouse was characterized to form H-DNA in vitro. The cloned insert contains a (CT)io insert flanked by (T ,C) rich tracts. The conditions for H-DNA formation of this mouse-derived sequence is similar to the conditions of the synthetic insert cloned within pTC15. A protein-DNA interaction with the sequence d(TC)0 was examined using nuclear protein extracts. A cluster of proteins was discovered to bind to the single­stranded oligonucleotide d(TC)i6 but not its complementary strand, d(GA)l6 nor the duplex sequence d(TCh6·d(GAh6- These single-stranded d(TC)n binding proteins are found among several mammalian species examined and have been sized as 55.5 and 57 kD doublets using southwestern analysis. The existence of this protein is incompatible with postulated in vivo existence of the d(TC)n type triplexes in eukaryotic cells.
TRACE Observations of Driven Loop Oscillations
Creators: name: Ballai, I.
name: Jess, D. B.
name: Douglas, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aims: On 13 June 1998, the TRACE satellite was fortuitously well placed to observe the effects of a flare-induced EIT wave in the corona, and its subsequent interaction with coronal magnetic loops. In this study, we use these TRACE observations to corroborate previous theoretical work, as well as estimate the magnetic field strength and the degree of longitudinal inhomogeneity. Methods: Loop edges are tracked, both spatially and temporally, using wavelet modulus maxima algorithms, with corresponding loop displacements from its quiescent state analysed by fitting scaled sinusoidal functions. The physical parameters of the coronal loop are subsequently determined using seismological techniques. RESULTS: The studied coronal loop is found to oscillate with two distinct periods, 501 +/- 5 s and 274 +/- 7 s, which could be interpreted as belonging to the fundamental and first harmonic, or could reflect the stage of an overdriven loop. When assuming the periods belong to the fundamental kink mode and its first harmonic, we obtain a magnetic field strength inside the oscillating coronal loop as 2.0 +/- 0.7 G. In contrast, interpreting the oscillations as a combination of the loop's natural kink frequency and a harmonious EIT wave provides a magnetic field strength of 5.8 +/- 1.5 G. Using the ratio of the two periods, we find that the gravitational scale height in the loop is 73 +/- 3 Mm. Conclusions: We show that the observation of two distinct periods in a coronal loop does not necessarily lead to a unique conclusion. Multiple plausible scenarios exist, suggesting that both the derived strength of the magnetic field and the sub-resolution properties of the coronal loop depend entirely on which interpretation is chosen.
description: 4 figures, accepted as an A&A Letter
A New fading model for digital mobile communications
Creators: name: Zhang, Hongliang
Publisher: name: University of Calgary
Year: 1991
Subjects: subject: TK 6570 M6 Z43 1991
subject: Mobile communication systems
subject: Digital communications

description: Bibliography: p. 79-81.
description: A polynomial model is developed for describing a CW signal transmitted over a frequency-flat (nonselective) radio fading channel. It is shown that the model is accurate and can be used to estimate the random FM caused by the deep fading, from the envelope alone of the received signal. Since the model is parametric, effective estimation algorithms have been developed extracting the model's parameters from the signal. Based on these algorithms, it is also shown that it is possible to establish a statistical fading simulation model for a frequency-flat fading channel by extracting the statistical distributions of the model's parameters from the channel measurements.
Topological light bullets supported by spatio-temporal gain
Creators: name: Lobanov, Valery E.
name: Borovkova, Olga. V.
name: Kartashov, Yaroslav V.
name: Vysloukh, Victor A.
name: Torner, Lluis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We reveal that the competition between diffraction, cubic nonlinearity, two-photon absorption, and gain localized in both space and time results in arrest of collapse, suppression of azimuthal modula-tion instabilities for spatiotemporal wavepackets, and formation of stable three-dimensional light bul-lets. We show that Gaussian spatiotemporal gain landscapes support bright, fundamental light bullets, while gain landscapes featuring a ring-like spatial and a Gaussian temporal shapes may support stable vortex bullets carrying topological phase dislocations.
description: 19 pages, 5 figures, to appear in Physical Review A
A UTILIZAÇÃO DO KAHOOT NA INTRODUÇÃO DA LÍNGUA INGLESA EM SÉRIE INICIAL DO ENSINO MÉDIO
Creators: name: Aimê Felix Pordeus
name: Gean Carlos Souza Araújo Filho
name: Mateus Fernandes Florentino
name: Melk Andrade Costa
Publisher: name: Zenodo
Year: 2023

description: Sabe-se que a língua inglesa é o idioma universal, sendo necessário que os alunos tenham domínio dele para a vida escolar, trabalho e para a comunicação. Assim, o objetivo deste artigo é analisar como o aplicativo kahoot pode beneficiar as aulas sendo uma metodologia ativa, trazendo para a sala de aula de modo que os alunos o utilizem seus games para o auxílio à introdução da língua inglesa, de forma interativa e dinâmica, no Ensino Médio. Busca-se não só verificar o conhecimento básico da língua inglesa adquirido em todo o desenvolver da carreira escolar do aluno e em suas vivências socioculturais, mas também desenvolver a capacidade de utilizar a tecnologia para aprimorar o ensino e, também, sua capacidade de sociabilização com os demais alunos. Também levamos em conta que as tecnologias estão cada vez mais presentes no cotidiano dos alunos, e sabemos que elas podem trazer grandes benefícios para a introdução da língua inglesa. Dessa forma, realizamos um movimento bibliográfico com desenvolvimento prático da ferramenta, demonstrando sua aplicabilidade.
Functional Currents : a new mathematical tool to model and analyse functional shapes
Creators: name: Charon, Nicolas
name: Trouvé, Alain
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Geometry (cs.CG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Differential Geometry (math.DG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This paper introduces the concept of functional current as a mathematical framework to represent and treat functional shapes, i.e. sub-manifold supported signals. It is motivated by the growing occurrence, in medical imaging and computational anatomy, of what can be described as geometrico-functional data, that is a data structure that involves a deformable shape (roughly a finite dimensional sub manifold) together with a function defined on this shape taking value in another manifold. Indeed, if mathematical currents have already proved to be very efficient theoretically and numerically to model and process shapes as curves or surfaces, they are limited to the manipulation of purely geometrical objects. We show that the introduction of the concept of functional currents offers a genuine solution to the simultaneous processing of the geometric and signal information of any functional shape. We explain how functional currents can be equipped with a Hilbertian norm mixing geometrical and functional content of functional shapes nicely behaving under geometrical and functional perturbations and paving the way to various processing algorithms. We illustrate this potential on two problems: the redundancy reduction of functional shapes representations through matching pursuit schemes on functional currents and the simultaneous geometric and functional registration of functional shapes under diffeomorphic transport.
description: 28 pages, 10 figures
Design of fast 3-D frequency planar and frequency beam recursive digital filters
Creators: name: Zhang, Yuejin
Publisher: name: Engineering
Year: 1991
Subjects: subject: TK 7868 D5 Z43 1991
subject: Signal processing - Digital techniques
subject: Image processing - Digital techniques

description: Bibliography: p. 162-164.
description: By exploring parallelism, new three-dimensional discrete recursive filter structures are proposed, developed, and investigated for implementing a class of 3-D Frequency Planar and 3-D Frequency Beam recursive filters. It is shown that these new structures are suitable for high-speed, real-time applications. Three-dimensional discrete ladder form structures using discrete differentiators, based on 1-D ladder signal flow graph simulation, are proposed. Elemental pre-distortion and signal flow graph manipulation techniques are presented to eliminate the delay-free loops in the discrete signal flow graph topology without altering the transfer function, leading to very simple 3-D discrete filter structures. Three-dimensional discrete direct-differentiator form structures are proposed and developed by means of a novel frequency transformation. These 3-D recursive filter structures directly realize the filter transfer functions and offer a high operating speed. The effect of the 3-D bilinear frequency warping on the class of 3-D Frequency Planar and Frequency Beam recursive filters is investigated and a 3-D pre-warping design technique is proposed. It is shown that characteristics of the 3-D bilinear frequency warping are very different from those found in the 1-D and 2-D cases. Examples of simulations are given in both 3-D spatial-temporal-domain and 3-D frequency-domain to verify that the proposed 3-D recursive filter structures have he required characteristics.
On the Verdict of the German Physical Society Against the Karlsruhe Physics Course – a Chronicle of Events
Creators: name: Herrmann, Friedrich
name: Pohlig, Michael
Publisher: name: Università degli Studi di Palermo
Year: 2015
Subjects: Karlsruhe Physics Course
German Physical Society

description: The Karlsruhe Physics Course (KPC) is a novel approach to the teaching of physics at the secondary school. It was developed more than 30 years ago. The KPC textbooks have since been used in a certain, slightly increasing number of German schools. Simultaneously, ideas of the KPC have found their way into the mainstream textbooks. Only recently, the German Physical Society (DPG) got aware of the course. In their opinion the KPC represents a danger to the teaching of physic. Therefore, the DPG nominated an expert panel with the assignment of finding scientific errors in the KPC. The panel believed to have found such errors. Thereupon the DPG has initiated a campaign with the objective of eliminating not only the KPC textbooks from the market but to eradicate any other manifestation of ideas that might have originated in the KPC work. The DPG did so not only in Germany but worldwide. Among other things, the DPG alerted the European Physical Society and the Chinese Physical Society. As a result of these measures, a discussion of unusual fierceness arose, first in Germany, but then spreading to other countries. Thereby the physics community got more and more polarized. A chronicle of an eventful year and a brief evaluation will be given from the perspective of the author of the course and of a teacher who uses the KPC in his classes.