cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
BeppoSAX Wide Field Cameras observations of six type I X-ray bursters
Creators: name: Cornelisse, R.
name: Verbunt, F.
name: Zand, J. J. M. in 't
name: Kuulkers, E.
name: Heise, J.
name: Remillard, R. A.
name: Cocchi, M.
name: Natalucci, L.
name: Bazzano, A.
name: Ubertini, P.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have discovered three certain (SAX J1324.5-6313, 2S 1711-339 and SAX J1828.5-1037) and two likely (SAX J1818.7+1424 and SAX J2224.9+5421) new thermonuclear X-ray burst sources with the BeppoSAX Wide Field Cameras, and observed a second burst ever from a sixth one (2S 0918-549). Four of them (excluding 2S 1711-339 and 2S 0918-549) are newly detected X-ray sources from which we observed single bursts, but no persistent emission. We observe the first 11 bursts ever from 2S 1711-339; persistent flux was detected during the first ten bursts, but not around the last burst. A single burst was recently detected from 2S 0918-549 by Jonker et al.(2001); we observe a second burst showing radius expansion, from which a distance of 4.2 kpc is derived. According to theory, bursts from very low flux levels should last ~100 s. Such is indeed the case for the last burst from 2S 1711-339, the single burst from SAX J1828.5-1037 and the two bursts from 2S 0918-549, but not for the bursts from SAX J1324.5-6313, SAX J1818.7+1424 and SAX J2224.9+5421. The bursts from the latter sources all last ~20 s. We suggest that SAX J1324.5-6313, SAX J1818.7+1424, SAX J1828.$-1037 and SAX J2224.9+5421 are members of the recently proposed class of bursters with distinctively low persistent flux levels, and show that the galactic distribution of this class is compatible with that of the standard low-mass X-ray binaries.
description: 10 pages, 6 figures, accepted by A&A
Geometric-phase microscopy for high-resolution quantitative phase imaging of plasmonic metasurfaces with sensitivity down to a single nanoantenna
Creators: name: Bouchal, Petr
name: Dvořák, Petr
name: Babocký, Jiří
name: Bouchal, Zdeněk
name: Ligmajer, Filip
name: Hrtoň, Martin
name: Křápek, Vlastimil
name: Faßbender, Alexander
name: Linden, Stefan
name: Chmelík, Radim
name: Šikola, Tomáš
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical metasurfaces have emerged as a new generation of building blocks for multi-functional optics. Design and realization of metasurface elements place ever-increasing demands on accurate assessment of phase alterations introduced by complex nanoantenna arrays, a process referred to as quantitative phase imaging. Despite considerable effort, the widefield (non-scanning) phase imaging that would approach resolution limits of optical microscopy and indicate the response of a single nanoantenna still remains a challenge. Here, we report on a new strategy in incoherent holographic imaging of metasurfaces, in which unprecedented spatial resolution and light sensitivity are achieved by taking full advantage of the polarization selective control of light through the geometric (Pancharatnam-Berry) phase. The measurement is carried out in an inherently stable common-path setup composed of a standard optical microscope and an add-on imaging module. Phase information is acquired from the mutual coherence function attainable in records created in broadband spatially incoherent light by the self-interference of scattered and leakage light coming from the metasurface. In calibration measurements, the phase was mapped with the precision and spatial background noise better than 0.01 rad and 0.05 rad, respectively. The imaging excels at the high spatial resolution that was demonstrated experimentally by the precise amplitude and phase restoration of vortex metalenses and a metasurface grating with 833 lines/mm. Thanks to superior light sensitivity of the method, we demonstrated, for the first time to our knowledge, the widefield measurement of the phase altered by a single nanoantenna, while maintaining the precision well below 0.15 rad.
description: 11 pages, 6 figures
New York City Wholesale Fresh Fruit and Vegetable Markets
Creators: name: Clowes, Harry G.
name: Clowes, Harry G.
Publisher: name: Unknown
Year: 1960
Subjects: subject: Crop Production/Industries
subject: Financial Economics
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: This study was begun in June 1956 at the request of the New York Branch of the United Fresh Fruit and Vegetable Association for assistance in planning a new wholesale fresh fruit and vegetable market. It is part of a broad program of research to improve the facilities used in moving farm and food products from farm to consumer in order to reduce marketing costs. Objectives of the study were: 1. To analyze and evaluate the wholesale marketing situation for fresh fruits and vegetables for New York City. 2. To estimate the major direct costs in handling these products under present conditions. 3. To determine the kinds and amounts of facilities needed for efficient distribution. 4. To estimate total costs of construction, operating expenses, and sources of income for new marketing facilities in several possible locations in the New York City metropolitan area. 5. To outline the potential benefits to be secured from construction of a new and modern market. This report recommends new and efficient facilities at a new location for fresh fruit and vegetable wholesalers now operating from outmoded and inefficient facilities in the Lower Manhattan Market, the primary wholesale food marketing area in New York City.
title: Architecture to Detect, Track, and Classify Objects using LiDAR Measurements in Highway Scenarios
Creators: name: Pelka, Mathias
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2019
Subjects: subject: LiDAR
subject: object tracking
subject: self-driving cars
subject: autonomous cars
subject: 621.3

description: Self-driving cars require a holistic perception of
their environment. To achieve this requirement, a plethora of
sensor technologies exists e.g. RGB-camera, ultra-sonic and
radar. Those sensor technologies have different range, as well as
resolution and behave differently with varying weather conditions.
Another technology is Light Detection and Ranging (LiDAR),
which enables precise distance measurements. In combination
with RGB-cameras, ultra-sonic, and radar, LiDAR closes the gap
to enable the holistic perception of the environment.
Due to limited experience with LiDAR sensors, there is a lack
of understanding how to detect, track, and classify objects (e.g.
cars, guardrails) using LiDAR data. In this paper, we propose an
architecture to detect, track, and classify objects based on LiDAR
measurements in highway scenarios.We evaluate our architecture
using preliminary sensor data obtained from a setup including
six Ibeo Lux sensors and additional a roof mounted Velodyne
HDL-64E.
description: Proceedings of the 4th KuVS/GI Expert Talk on Localization
Compsoctena africanella
Creators: name: Mbata, Keith J.
name: Prins, Jurate De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Eriocottidae
Compsoctena
Compsoctena africanella

description: Compsoctena africanella (Strand, 1909a)
COMMON NAME(S): Old World spiny-winged moth.
SYNONYM(S): None.
IUCN STATUS: Not Evaluated (NE).
DISTRIBUTION: Botswana, Malawi, Mozambique, South Africa, Tanzania, Zambia.
LOCALITY IN ZAMBIA: Kafue, in Lusaka Province.
LARVAL HOSTPLANT(S): Unknown.
SOURCES: De Prins & De Prins 2022; Pinhey 1976; Strand 1909a.
description: Published as part of Mbata, Keith J. & Prins, Jurate De, 2023, Annotated checklist of moths of Zambia (Insecta: Lepidoptera), pp. 1-503 in Zootaxa 5354 (1) on page 22, DOI: 10.11646/zootaxa.5354.1.1, http://zenodo.org/record/10130434
Novel isothiourea catalysts and reactivity
Creators: name: Westwood, Matthew
Publisher: name: The University of St Andrews
Year: 2024
Subjects: Isothiourea
Enantioselective
Photoredox
Organocatalytic
Pyrazolone
Kinetic resolution
Catalyst design

description: This thesis documents the development of both novel isothiourea catalyst structures and new synthetic methodologies including the combination of isothiourea organocatalysis with novel activation modes and heterocyclic reaction partners. Chapter 1 introduces the history and concepts of asymmetric organocatalysis with an emphasis on the development of isothioureas as small molecule organocatalysts. A focus is placed on both isothiourea catalysed kinetic resolutions and α,β-unsaturated acyl ammonium intermediates with reference to the key reactivity modes and current state-of-the-art reactivity to place the work presented in this thesis in context. Chapter 2 describes the development of the isothiourea catalysed acylative kinetic resolution of pyrazolone-derived tertiary alcohols. Under the conditions developed, a diverse range of substituted pyrazolone tertiary alcohols could be successfully resolved with exceptional selectivity observed in most examples, including several that incorporate pharmaceutical compounds. Chapter 3 describes the history and development of visible light photoredox catalysis and its applications to organic synthesis. The generation of nucleophilic α-amino radicals using photoredox catalysis is discussed and particular emphasis placed on the synthesis of γ-lactams using α-amino radicals. The development of the enantioselective synthesis of γ-lactams via dual isothiourea/photoredox catalysis is detailed. The protocol was then extended to a range of pivaloyl anhydrides and α-silyl amines. The development of α-amino acids as radical precursors in this reaction is then discussed including applying the methodology to synthesise a wide range of γ-lactams and extending the reaction to flow conditions. Chapter 4 describes the development of two novel catalysts designed to circumvent the observed oxidative degradation of isothioureas by the excited state of many photocatalysts. The first strategy developed was the incorporation of the electron withdrawing CF2 group into the core of the isothiourea. Whilst this had the desired effect of decreasing isothiourea degradation by photocatalysts, the CF2 group reduced the nucleophilicity of the catalyst to the extent that reactivity in several previously reported isothiourea reactions was not observed. The second strategy developed was the rigidification of the isothiourea to minimise degradation pathways from the postulated radical cation intermediate. This catalyst showed greatly increased survivability whilst maintaining high reactivity and nucleophilicity. Gram-scale routes were developed to access both catalysts in both racemic and enantiopure form.
Investigating early childhood children’s mental representations about the programmable floor robot Bee-Bot
Creators: name: MISIRLI, ANASTASIA
name: NIKOLOS, DIMITRIS
name: KOMIS, VASSILIS
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Educational robotics, programmable floor robot Bee-Bot, children’s mental representations

description: A preliminary study concerning early childhood children’s mental representations about the programmable floor robot Bee-Bot is presented in this study. It is about a case study that takes place in four preschool settings. Children’s mental representations were recorded through individual-focused interviews and depicted in individual drawings. The results show that while children may attribute an animate identity to the robot, they provide evidence and depict data for its properties and basic operational features, which are gained through educational activities in programming.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Studying computational thinking in K-12 education through learning analytics: towards a systematic mapping protocol
Creators: name: DOLIANITI, FOTEINI
name: HADJILEONTIADIS, LEONTIOS
name: TSITOURIDOU, MELPOMENI
name: BIRBILI, MARIA
Publisher: name: Mediterranean Journal of Education
Year: 2022
Subjects: Computational thinking, learning analytics, systematic mapping, K-12, education

description: The ever-increasing interest of the research community around students’ Computational Thinking (CT), as well as the vast number of related studies that have been produced until today, calls for systematic efforts to summarize the knowledge in the field. This work explores the adaptation of general guidelines for conducting rigorous reviews to the distinct needs of a systematic mapping focusing on studies that assess CT in K-12 education through Learning Analytics (LA). Well-known guidelines for systematic mapping studies were used as the methodological framework and topic-specific issues penetrating CT and LA were explored in order to formulate a topic-informed protocol. Making this protocol publicly available will strengthen the transparency and rigorousness of the systematic mapping in the field of learning technologies.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Fine structure of $\mathrm{K}$-excitons in multilayers of transition metal dichalcogenides
Creators: name: Slobodeniuk, A. O.
name: Bala, Ł.
name: Koperski, M.
name: Molas, M. R.
name: Kossacki, P.
name: Nogajewski, K.
name: Bartos, M.
name: Watanabe, K.
name: Taniguchi, T.
name: Faugeras, C.
name: Potemski, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Reflectance and magneto-reflectance experiments together with theoretical modelling based on the $\mathbf{k\cdot p}$ approach have been employed to study the evolution of direct bandgap excitons in MoS$_2$ layers with a thickness ranging from mono- to trilayer. The extra excitonic resonances observed in MoS$_2$ multilayers emerge as a result of the hybridization of Bloch states of each sub-layer due to the interlayer coupling. The properties of such excitons in bi- and trilayers are classified by the symmetry of corresponding crystals. The inter- and intralayer character of the reported excitonic resonances is fingerprinted with the magneto-optical measurements: the excitonic $g$-factors of opposite sign and of different amplitude are revealed for these two types of resonances. The parameters describing the strength of the spin-orbit interaction are estimated for bi- and trilayer MoS$_2$.
description: 14 pages, 10 figures
title: A Low-Cost GNSS Repeater for Indoor Operation
Creators: name: Schröder, Yannic
name: Wolf, Lars
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2019
Subjects: subject: 621.3

description: GNSS hardware can only be used outdoors as
reception is strongly attenuated by buildings. We present a costeffective way to build a GNSS repeater that can be used to
test GNSS hardware indoors. Its design comprises two GNSS
antennas and four extra passive components. We evaluate the
performance of the circuit and show that it can be used to relay
GPS, GLONASS, and Galileo signals to a GNSS receiver with
its antenna being indoors, close to the GNSS repeater.
description: Proceedings of the 4th KuVS/GI Expert Talk on Localization
An experimental test of gravity at high energy
Creators: name: Glicenstein, J-F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gravitational lensing of very high energy photons has recently been observed in the JVAS B0218+357 strong lensing system. This observation opens the possibility of performing a test of gravity at high energy by comparing the difference in propagation time of high energy photons over different travel paths. The time delay is computed in the framework of a LIV (Lorentz Invariance Violation) extension of the equations of motion of photons in the field of a massive object. However, the method obtained can be transposed to other models of gravity at high energy. The potential for constraining high energy gravity with future observations of JVAS B0218+357 is discussed. The bounds on the LIV energy scale will not be competitive with other astrophysical bounds such as those coming from AGN and GRB flares. However, these bounds are free of any assumption on the emission process.
Lyapunov exponents, entropy production and decoherence
Creators: name: Pattanayak, Arjendu K.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We establish that the entropy production rate of a classically chaotic Hamiltonian system coupled to the environment settles, after a transient, to a meta-stable value given by the sum of positive generalized Lyapunov exponents. A meta-stable steady state is generated in this process. This behavior also occurs in quantum systems close to the classical limit where it leads to the restoration of quantum-classical correspondence in chaotic systems coupled to the environment.
description: 4 ReVTeX pages + 3 postscript figures. PRL (to appear)
title: Hardware Design for an Angle of Arrival Positioning System
Creators: name: Gunia, Marco
name: Zinke, Adrian
name: Joram, Niko
name: Ellinger, Frank
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2019
Subjects: subject: Localization
subject: Positioning
subject: Angle of Arrival
subject: 621.3

description: Nowadays, there are a variety of different indoor
positioning systems employing diverse techniques. Besides inertial navigation, most systems are based on ranging. For instance, techniques utilizing the Received Signal Strength (RSS), phase-difference, time of flight or time of arrival usually convert this information to distances, where trilateration is used to calculate the position. In contrast, approaches utilizing the Angle of Arrival 
(AoA) are commonly overlooked in literature. Within this paper,
we present the hardware design for building such a system and
give an outlook towards the algorithms to determine of the AoA.
Preliminary measurements show the operability of the system.
description: Proceedings of the 4th KuVS/GI Expert Talk on Localization
D10.2: Communication and dissemination plan
Creators: name: Baulenas, Eulàlia
name: Bojovic, Dragana
Publisher: name: Zenodo
Year: 2022

description: Work package in charge

WP10, Storms & Society

Executive summary

This deliverable details the NextGEMS project communication and dissemination plan, which has as main objective the engagement of a broader audience reaching from the scientific community to many societal actor groups. This activity is part of WP10 and the storms & society theme, and the main two partners responsible for its implementation are BSC and LT. However, the plan will be deployed in close collaboration with all consortium members and project participants.

This deliverable is structured as follows: first, it details the importance of a good communication and dissemination strategy, and it defines the goals and scope of these activities. Secondly, it details our expertise and our audience, as well as the range of aspects that form its implementation. It concludes with exploring the channels which are used, as well as describing the risk and mitigation plan. There are three main innovations in distribution channels of the project results, additionally to the traditional approaches such as the official website, project deliverables, and peer-reviewed articles. These innovations consist of the vlogs, scientific explainers, and storylines. We detail them also in the section 4.3 and close this report with a section on the expected outcomes of this communication and dissemination plan.

Conclusion & Results

As the communication, dissemination, and exploitation strategy of any climate sciencerelatedproject is crucial for the very success of it, the activities described in this deliverable are planned to start at the beginning of the project and to follow it until the end and are based on the principles of visibility, transparency, plurality, and usability. This is, achieving visibility of the project and its outcomes for a wide range of stakeholder circles; being transparent on the evolution of the NextGEMS scientific production; plurality in the perspectives included and reached with the different communication and dissemination products; and usability by bringing the scientific outputs to the right user by raising awareness on them. In this respect, the communication and dissemination plan has already started and has shown the first results with two videos that are shared on the website and through social media platforms such as Twitter and Vimeo, paving the way for project visibility and transparency. These videos have been a joint production of communication experts and the scientists that form part of the consortium members and target all the  stakeholder groups that we aim to engage throughout the project. In this deliverable, further efforts are detailed in the curationof the message, means and mediums of this plan, as well as how these differ by the different stakeholder groups.
Vers l'usage des simulateurs informatiques comme solution palliative aux problèmes de manque de travaux pratiques des sciences physiques à l’ISTA/Kinshasa
Creators: name: N’DJOLI, JACQUES
name: BENABDELOUAHAB, FARID
name: ZERHANE, RAJAE
name: JANATI-IDRISSI, RACHID
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: ICT, technological innovation, computer simulators, ISTA/Kinshasa

description: A country like the DRC (Democratic Republic of the Congo) considers scientific and technological training as a sure means for professional insertion and for its economic development. Science education remains a fundamental issue for its citizens. This article attempts to identify, through the analysis of data collected from all teachers of physical sciences at ISTA/Kinshasa, the merits of using computer simulators in the teaching-learning of sciences. This type of teaching will greatly promote the professional development of future engineers of this school. Indeed, considered at the present time, as pedagogical tools, computer simulators do not yet occupy an important place in teaching learning of this academic subject in DRC. Hence, the question of the necessity of an adequate technological equipment in this institution and of a techno-pedagogical training of the teachers. This is the major concern of the Congolese state authorities.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
title: Navigation in a library using smartphones
Creators: name: Stoeck, Janek
name: Sternberg, Harald
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2019
Subjects: subject: indoor navigation
subject: indoor localization
subject: dead reckoning
subject: routing
subject: topological support
subject: 621.3

description: In these times, when everyone wants to do as much
work as possible in the least amount of time, it is important
to make the workflow as efficient as possible. Spending an
unnecessary amount of time looking for things is therefore contra
productive. Using the library HafenCity University Hamburg
(HCU) as an example, this paper shows how the time required to
find a book can be reduced by introducing an indoor navigation
system for that purpose.
Acceleration sensors are used to realize a step counter. In
combination with gyroscope data a dead reckoning can be
carried out. The height information is derived of barometric
measurements. For additional support, routing graphs are
used to constrain the walking direction. With this setup and
the additional topological we achieve deviations between last
estimated to wanted position less than two meters.
description: Proceedings of the 4th KuVS/GI Expert Talk on Localization
Which geoscience knowledge at the end of upper-secondary school? Results from an Italian survey
Creators: name: BORGHINI, ALESSANDRA
name: PIERACCIONI, FABIO
name: BASTIANI, LUCA
name: BONACCORSI, ELENA
name: GIONCADA, ANNA
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Earth science curriculum, student learning, quality assessment, misconceptions, survey development

description: Monitoring basic geoscience skills at the end of upper-secondary school is necessary, when we consider that understanding geoscience issues is today required to face the changes affecting our planet. We present here the application of a screening tool - IMES2 or ‘Individuation of Misconceptions in Earth Sciences 2’ - designed for surveying geoscience knowledge at the end of upper-secondary school. It was applied to screen 403 students enrolled in the first year of different courses at the University of Pisa (Italy) in the academic year 2020-21. The results indicate that, at the end of the upper secondary school, several misconceptions regarding endogenous and exogenous geological processes and the geological time, already reported in the geoscience education literature, are present.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
SAT-Inspired Higher-Order Eliminations
Creators: name: Blanchette, Jasmin
name: Vukmirović, Petar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We generalize several propositional preprocessing techniques to higher-order logic, building on existing first-order generalizations. These techniques eliminate literals, clauses, or predicate symbols from the problem, with the aim of making it more amenable to automatic proof search. We also introduce a new technique, which we call quasipure literal elimination, that strictly subsumes pure literal elimination. The new techniques are implemented in the Zipperposition theorem prover. Our evaluation shows that they sometimes help prove problems originating from Isabelle formalizations and the TPTP library.
Problématisation et débat scientifique avec des élèves tunisiens de classe terminale à propos de la pile Daniell
Creators: name: AYADI, TAKWA
name: ΒΕΝ KILANI, CHIRAZ
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Problematization, scientific debate, epistemic analysis, constraints and necessities

description: The present research focuses on the analysis of a scientific debate with Tunisian pupils in the final class during their construction of a reasoned knowledge about the Daniell cell. In the theoretical framework of problematization, the reasons are categorized in terms of constraints and necessities. The data are collected from a video recording. The epistemic analysis conducted shows that the pupils, when constructing problematized knowledge, mobilize theoretical knowledge confronted during previous classes, the necessities constructed are little or not explicit. This epistemological analysis allows us to better understand what is at stake in a scientific debate in class during the construction of a problematized knowledge.
description: Mediterranean Journal of Education, Vol. 1, N. 2 (2021) - Colloque SIEST Méditerranée 7
Gentrification in Berlin: A Novel Conceptually Driven Quantitative Approach to Evaluating Anti-Displacement Legislation
Creators: name: Schwab, Clyde
Publisher: name: University of Chicago
Year: 2021
Subjects: subject: gentrification + Berlin + survival analysis + difference in differences + did + geography + spatial analysis

description: As cities across the world have experienced urbanization over the past several decades, gentrification, and its accompanying social and economic tensions, has become one of the most prominent issues in geography literature. As affected citizens struggle to fight displacement and cities coordinate policy responses, the academic community has struggled to rigorously define and quantify gentrification despite the substantial attention paid in popular media to gentrification as an urban phenomenon (Preis et al, 2020). Policy responses have also been varied, with cities using a mix of rent controls, supply-side initiatives, and other regulatory measures to mitigate — and sometimes encourage —gentrification (Lees and Ley, 2008). Berlin has experienced dramatic gentrification over the past two decades, but policymakers have struggled to respond. In this paper, I evaluate the effectiveness of "Erhaltungsverordnungen", or preservation laws, an as-of-yet unexamined method of slowing gentrification. To do so, I develop a novel method of evaluating gentrification using Dangschat's (1988) invasion-succession model of gentrification and classify each LOR planning area in Berlin (n=448) bi-yearly from 2001 to 2019 as being in one of five stages of gentrification using demographic and real-estate valuation data. With this data, I use a multi-state survival analysis based on Therneau et al (2020) and a multiple-group time variable treatment effect difference-in-difference approach drawn from Callaway and Sant'Anna (2020) to evaluate preservation laws. I extend Callaway and Sant'Anna (2020) to evaluate the possibility of spillover effects according to Butts (2021). I find no indication of preservation legislation slowing gentrification and that further research is necessary because of the recency of the adoption of said legislation. Broadly, this paper represents an exploratory analysis into the possibility of more exactly measuring gentrification throughout its course and utilizing said data for policy interventions
Ramsey Spectroscopy with Displaced Frequency Jumps
Creators: name: Shuker, M.
name: Pollock, J. W.
name: Boudot, R.
name: Yudin, V. I.
name: Taichenachev, A. V.
name: Kitching, J.
name: Donley, E. A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Sophisticated Ramsey-based interrogation protocols using composite laser pulse sequences have been recently proposed to provide next-generation high-precision atomic clocks with a near perfect elimination of frequency shifts induced during the atom-probing field interaction. We propose here a simple alternative approach to the auto-balanced Ramsey (ABR) interrogation protocol and demonstrate its application to a cold-atom microwave clock based on coherent population trapping. The main originality of the method, based on two consecutive Ramsey sequences with different dark periods, is to sample the central Ramsey fringes with frequency-jumps finely-adjusted by an additional frequency-displacement concomitant parameter, scaling as the inverse of the dark-period. The advantage of this displaced frequency-jumps Ramsey (DFJR) method is that the local oscillator frequency is used as a single physical variable to control both servo loops of the sequence, simplifying its implementation and avoiding noise associated with controlling the LO phase. Compared to the usual Ramsey-CPT technique, the DFJR scheme reduces the sensitivity of the clock frequency to variations of the CPT sideband ratio and to the one-photon laser detuning by more than an order of magnitude. This simple method could be applied in a wide variety of Ramsey-spectroscopy based applications including frequency metrology with CPT-based and optical atomic clocks, mass spectrometry, and precision spectroscopy.
From the Chern-Simons theory for the fractional quantum Hall effect to the Luttinger model of its edges
Creators: name: Orgad, Dror
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The chiral Luttinger model for the edges of the fractional quantum Hall effect is obtained as the low energy limit of the Chern-Simons theory for the two dimensional system. In particular we recover the Kac-Moody algebra for the creation and annihilation operators of the edge density waves and the bosonization formula for the electronic operator at the edge.
description: 4 pages, LaTeX, 1 Postscript figure included
title: Understanding and Prediction of Ultra-Wide Band Channel Impulse Response Measurements
Creators: name: Matthews, Benjamin
name: Schmidt, Sven
name: Hellbrück, Horst
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2019
Subjects: subject: channel impulse response
subject: ultra-wide band
subject: channel estimation
subject: internet of things
subject: 621.3

description: Recently, ultra-wide band transceiver systems have
provided data transfer, timestamps and channel impulse response
measurements to the user. The interpretation of the timestamps
and the channel impulse response, however, is difficult and
not intuitive. In simple scenarios, line of sight and non-line
of sight pulses can be distinguished easily, which simplifies the
reconstruction. For more complex scenarios, the interpretation
remains difficult and is still an unsolved problem. In this paper,
we investigate the channel impulse response measurements of the
DecaWave DW1000 ultra-wide band transceiver and model the
expected results for simple scenarios based on information provided from the transceiver data sheet. We will show that we are
able to predict the measurement results of the transceiver with
acceptable accuracy by applying the model above in experiments.
description: Proceedings of the 4th KuVS/GI Expert Talk on Localization
Massless Cosmic Strings in Expanding Universe
Creators: name: Fursaev, Dmitri V.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Circular massless cosmic strings which move with the speed of light in the de Sitter universe are described. Construction of the background geometry is based on parabolic isometries of the de Sitter spacetime. Microscopic circular cosmic strings may appear at the Planck epoch and then grow up to the Hubble size. We analyze: images of the strings, influence of strings on trajectories of matter, formation of overdensities, and shifts of energies of photons. These effects allow one to discriminate massless strings from their massive cousins. The present work extends our results on straight massless cosmic strings in Minkowsky spacetime to curved backgrounds.
description: 17 pages, 4 figures
Destination development in Western Siberia: tourism governance and evolutionary economic geography
Creators: name: Halkier, Henrik
name: Müller, Dieter K.
name: Goncharova, Natalia A.
name: Kiriyanova, Liliya
name: Kolupanova, Irina A.
name: Yumatov, Konstantin V.
name: Yakimova, Nataliya S.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Tourism development has often been identified as a tool for balancing negative effects of economic restructuring, especially in peripheral regions. Tourism-based activities often utilize the availability of abundant nature, but although most English language studies of destination development are presented from western contexts, examples from post-Soviet Russia are rare. Western Siberia is a periphery with access to natural resources and heavy industrialization but remotely located from domestic (Russian) and international markets, where tourism is often considered a saviour, especially for the regional economies. Stakeholders in this Russian resource periphery face challenges in managing governance and cooperation in destinations development due to frequent institutional, economic and social changes. Using evolutionary economic geography and based on primary sources and interview data, tourism development and stakeholder relations are assessed in three Western Siberia regions: Tomsk, Kemerovo and Altai Krai. Findings show that for tourism to make a significant contribution, it must be more central to the economic development agenda in all three regions. However, it is currently only achieving a permanent high-profile in one of them, being crowded out by other (mostly primary) industries in the other two. Although the specific tourism governance set-up varies between the three regions, it is clear that public tourism governance still sits somewhat uneasily between state control and the market economy. Tourism receives substantial public subsidies, especially in large-scale investment projects, which depend on federal support within a governance system where decentralization seems to be somewhat limited and unstable. As a result, the tourism path development in the Siberian periphery is highly dependent on state intervention and success in other sectors.
Emerging Adulthood and University students: the case of an Educational Greek Department
Creators: name: RAIKOU, NATASSA
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Emerging adulthood, higher education, university pedagogy, teacher students, pre-service teacher education

description: In this paper, we investigate the dimensions of emerging adulthood on teacher students and possible divergences to other disciplines. The research was conducted in 2020, with the participation of 206 students of the Department of Educational Sciences and Early Childhood Education at the University of Patras in Greece. The research tool was Arnett's IDEA questionnaire (Inventory of the Dimensions of Emerging Adulthood), adjusted by the researcher. The results confirmed the emerging adulthood characteristics of teacher students, nevertheless, interesting findings were also revealed. It seems that during their studies, teacher students progressively become more conscious, more realist, and more mature, meaning they move slowly towards adulthood.
description: Mediterranean Journal of Education, Vol. 2, N. 1 (2022)
Homomorphically Full Oriented Graphs
Creators: name: Bellitto, Thomas
name: Duffy, Christopher
name: MacGillivray, Gary
Publisher: name: arXiv
Year: 2022
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 05C60, 05C20, 68Q17

description: Homomorphically full graphs are those for which every homomorphic image is isomorphic to a subgraph. We extend the definition of homomorphically full to oriented graphs in two different ways. For the first of these, we show that homomorphically full oriented graphs arise as quasi-transitive orientations of homomorphically full graphs. This in turn yields an efficient recognition and construction algorithms for these homomorphically full oriented graphs. For the second one, we show that the related recognition problem is GI-hard, and that the problem of deciding if a graph admits a homomorphically full orientation is NP-complete. In doing so we show the problem of deciding if two given oriented cliques are isomorphic is GI-complete.
Statistical characteristics of observed Ly-$α$ forest and the shape of initial power spectrum
Creators: name: Demiański, M.
name: Doroshkevich, A.
name: Turchaninov, V.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Properties of $\sim$ 5000 observed Ly-$α$ absorbers are investigated using the model of formation and evolution of DM structure elements based on the Zel'dovich theory. This model is generally consistent with simulations of absorbers formation, accurately describes the Large Scale Structure observed in the galaxy distribution at small redshifts and emphasizes the generic similarity of the LSS and absorbers. The simple physical model of absorbers asserts that they are composed of DM and gaseous matter and it allows us to estimate the column density and overdensity of DM and gaseous components and the entropy of the gas trapped within the DM potential wells. The parameters of DM component are found to be consistent with theoretical expectations for the Gaussian initial perturbations with the WDM--like power spectrum. We demonstrate the influence of the main physical factors responsible for the absorbers evolution. The analysis of redshift distribution of absorbers confirms the self consistence of the assumed physical model and allows to estimate the shape of the initial power spectrum at small scales what in turn restricts the mass of dominant fraction of DM particles to $M_{DM}\approx 0.6 - 2$ keV. Our results verify the redshift variations of intensity of the UV background by about $4 - 6$ times and indicate that, perhaps, the available observations underestimate the intensity of this background.
description: 19 pages, 11 figures, MNRAS, accepted. Paper extended after referee comments. More important changes are in Secs. 2.3.3, 2.4, 2.6, 4.4, 4.6, 4.7, 6.3, 7.5
Constructive Many-one Reduction from the Halting Problem to Semi-unification (Extended Version)
Creators: name: Dudenhefner, Andrej
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Semi-unification is the combination of first-order unification and first-order matching. The undecidability of semi-unification has been proven by Kfoury, Tiuryn, and Urzyczyn in the 1990s by Turing reduction from Turing machine immortality (existence of a diverging configuration). The particular Turing reduction is intricate, uses non-computational principles, and involves various intermediate models of computation. The present work gives a constructive many-one reduction from the Turing machine halting problem to semi-unification. This establishes RE-completeness of semi-unification under many-one reductions. Computability of the reduction function, constructivity of the argument, and correctness of the argument is witnessed by an axiom-free mechanization in the Coq proof assistant. Arguably, this serves as comprehensive, precise, and surveyable evidence for the result at hand. The mechanization is incorporated into the existing, well-maintained Coq library of undecidability proofs. Notably, a variant of Hooper's argument for the undecidability of Turing machine immortality is part of the mechanization.
A Survey of Limitations and Enhancements of the IPv6 Routing Protocol for Low-power and Lossy Networks: A Focus on Core Operations
Creators: name: Ghaleb, Baraq
name: Al-Dubai, Ahmed
name: Ekonomou, Elias
name: Alsarhan, Ayoub
name: Nasser, Youssef
name: Mackenzie, Lewis
name: Boukerche, Azzedine
Publisher: name: arXiv
Year: 2019
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Driven by the special requirements of the Lowpower and Lossy Networks (LLNs), the IPv6 Routing Protocol for LLNs (RPL) was standardized by the IETF some six years ago to tackle the routing issue in such networks. Since its introduction, however, numerous studies have pointed out that, in its current form, RPL suffers from issues that limit its efficiency and domain of applicability. Thus, several solutions have been proposed in the literature in an attempt to overcome these identified limitations. In this survey, we aim mainly to provide a comprehensive review of these research proposals assessing whether such proposals have succeeded in overcoming the standard reported limitations related to its core operations. Although some of RPL weaknesses have been addressed successfully, the study found that the proposed solutions remain deficient in overcoming several others. Hence, the study investigates where such proposals still fall short, the challenges and pitfalls to avoid, thus would help researchers formulate a clear foundation for the development of further successful extensions in future allowing the protocol to be applied more widely.
description: 31 pages
title: Arbeitsplatzängste und Arbeitsplatzphobie: Ätiologie, Empirie und Therapie
Creators: name: Linden, Michael
name: Muschalla, Beate
Publisher: name: Springer
Year: 2007
Subjects: subject: Angsterkrankungen, Arbeitsplatzphobie, Arbeitsunfähigkeit
subject: anxiety disorders, workplace phobia, sick leave
subject: 150

description: Die Arbeit ist zeitlich, inhaltlich und sozial ein wichtiger Lebensbereich, weshalb Geschehnisse am Arbeitsplatz Auswirkungen auf die psychische Verfassung eines Menschen und psychische Störungen Auswirkungen auf den Arbeitsplatz haben müssen. Von besonderer Bedeutung ist der Zusammenhang zwischen Angst und Arbeitsplatz, da Arbeitsplätze ihrer Struktur nach angstauslösend bzw. –verstärkend sind.
Als gemeinsame Endstrecke kann es zu dem Syndrom einer Arbeitsplatzphobie kommen, mit panikartigen Ängsten bei Annäherung oder auch dem Gedanken an den Arbeitsplatz. Sie hat erhebliche Konsequenzen für den weiteren Krankheitsverlauf und erfordert spezielle therapeutische Konsequenzen. Die Bedeutung von arbeitsplatzbezogenen Ängsten und Arbeitsplatzphobie wird in der psychiatrischen Praxis nicht hinreichend gewürdigt. Diese Arbeit will auf dieses Problem hinweisen und einen konzeptuellen Rahmen zum Verständnis von Arbeitsplatzängsten und Arbeitsplatzphobie geben.
description: Work is an important area in life. Problems at the workplace and mental disorders must therefore have negative interactions. The relation of anxiety and workplace is especially important because the workplace is causing anxiety by its very nature.
A common final pathway of mental disorders in general and work related anxieties in particular are workplace phobias, with panic when approaching or even thinking of the work place. This is a serious complication with negative consequences for the further course of illness. It makes special therapeutic interventions necessary.
This paper describes the phenomenon of workplace related anxieties and workplace phobia and gives a conceptual framework for their understanding.
Reflexivity of a Banach Space with a Countable Vector Space Basis
Creators: name: Rabin, Michael Oser
name: Ravi, Duggirala
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics

description: All most all the function spaces over real or complex domains and spaces of sequences, that arise in practice as examples of normed complete linear spaces (Banach spaces), are reflexive. These Banach spaces are dual to their respective spaces of continuous linear functionals over the corresponding Banach spaces. For each of these Banach spaces, a countable vector space basis exists, which is responsible for their reflexivity. In this paper, a specific criterion for reflexivity of a Banach space with a countable vector space basis is presented.