cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Group conditions for entrepreneurial visions: role confidence, hierarchical congruences, and the imagining of future in entrepreneurial groups
Creators: name: Stamm, Isabell
name: Gutzeit, Marie
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 301 Soziologie, Anthropologie
subject: entrepreneurship
subject: economic sociology
subject: future
subject: groups
subject: roles
subject: collective agency

description: An essential part of entrepreneurial activity is the drafting and narrating of an entrepreneurial vision. This study is premised on the observation that entrepreneurial groups form an interaction arena for the practice of imagining the future and asks how the content of entrepreneurial visions is shaped by the conditions of the group. Taking an entrepreneurship-as-practice lens, which we enrich with sociological theory on the future (Beckert) and small groups (Fine), we engage in an in-depth case study of 12 entrepreneurial groups. We show how the content of entrepreneurial visions is configured by four elements (i.e., fictional expectation for the business or the group; future orientation that is continuing or divergent) and name two group conditions (i.e., role confidence and hierarchical congruence) that direct their configuration. We propose that lacking role confidence can impede thinking about the future of a business and that narrative hierarchies that challenge structural hierarchies can open a window for divergent future orientation. This study contributes to a novel theoretical understanding of where entrepreneurial visions come from by emphasizing politics of expectations within groups and calling to consider group conditions as a relevant context for entrepreneurial visions.
Implications, conflicts, and reductions for Steiner trees
Creators: name: Rehfeldt, Daniel
name: Koch, Thorsten
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 510 Mathematik
subject: Steiner tree problem
subject: optimal solution
subject: reduction techniques

description: The Steiner tree problem in graphs (SPG) is one of the most studied problems in combinatorial optimization. In the past 10 years, there have been significant advances concerning approximation and complexity of the SPG. However, the state of the art in (practical) exact solution of the SPG has remained largely unchallenged for almost 20 years. While the DIMACS Challenge 2014 and the PACE Challenge 2018 brought renewed interest into Steiner tree problems, even the best new SPG solvers cannot match the state of the art on the vast majority of benchmark instances. The following article seeks to advance exact SPG solution once again. The article is based on a combination of three concepts: Implications, conflicts, and reductions. As a result, various new SPG techniques are conceived. Notably, several of the resulting techniques are (provably) stronger than well-known methods from the literature that are used in exact SPG algorithms. Finally, by integrating the new methods into a branch-and-cut framework, we obtain an exact SPG solver that is not only competitive with, but even outperforms the current state of the art on an extensive collection of benchmark sets. Furthermore, we can solve several instances for the first time to optimality.
Exact time-dependent density-functional potentials for strongly correlated tunneling electrons
Creators: name: Hodgson, Matthew J. P.
name: Ramsden, James D.
name: Chapman, Jacob B. J.
name: Lillystone, Piers
name: Godby, Rex W
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By propagating the many-body Schrödinger equation, we determine the exact time-dependent Kohn-Sham potential for a system of strongly correlated electrons which undergo field-induced tunneling. Numerous features are entirely absent from the approximations commonly used in time-dependent density-functional theory. The self-interaction correction is strong and time dependent, owing to electron localization, and prominent dynamic spatial potential steps arise from minima in the charge density, as modified by the Coulomb interaction experienced by the partially tunneled electron.
description: 5 figures
The University Curriculum and the Ecology of Knowledges towards building a Planetary Citizenship
Creators: name: Moraes, Silvia Elizabeth
name: Freire, Ludmila Almeida
Publisher: name: TCI (Transnational Curriculum Inquiry)
Year: 2016

description: This paper presents results of the project Global citizenship as an inter/transdisciplinary theme in the university curriculum. The first part of the research was made with student-teachers at the Federal University of Ceará (2008-2012). To broaden our perspective on the topic, a second part was dedicated to analyze how other countries deal with this issue in their university curricula. For this purpose, Moraes spent 2013 at the Institute of Education, University of London (Capes, Estágio Senior) and Freire went to the Centre of Social Studies, University of Coimbra (Capes, Doctoral Internship, 2013-2014) to become acquainted with Boaventura de Sousa Santos’s Ecology of Knowledges. In Brazil, the concept evolved from global to planetary throughout our study. Portuguese has two words for knowledge: conhecimento and saber. The first one may refer to a more formal knowledge, as from the academic sciences. Saber is a contextualized knowledge, related to social demands, to the life-world (Habermas) where traditions, culture and sciences meet. Some Brazilian institutions are engaged in an epistemic and pedagogical experimentation that promotes dialogue between the academic world and the world of indigenous and African matrixes. We assume the university as a discursive context for building a Planetary Citizenship and the ecology of knowledge stands as the main category to support our reflection. This citizenship is conceived as a floating signifier that is articulated in a variety of concrete projects proposed by different groups. Planetary citizenship is the transdisciplinary theme that gives coherence to those projects; it is their ’saber organizador’.
description: TCI (Transnational Curriculum Inquiry), Vol. 13 No. 1 (2016): What are we meaning by Curriculum?
The Curriculum in Tension: a Discussion of Universalism and Particularism
Creators: name: Southwell, Myriam
Publisher: name: TCI (Transnational Curriculum Inquiry)
Year: 2016

description: This article will integrate a certain historical approach seeking to question the most outstanding elements on which the discourse of inclusion in our region was built. It will also explore how the institutional concretions of the story of inclusion are being increasingly stressed and called into question. Finally, we will seek to raise the discussion of “school format” in contemporary society and in the face of the imperatives of school expansion and adaptation to the demands of social movements. We will do this analysis from the conceptual tension between universalism and particularism.
description: TCI (Transnational Curriculum Inquiry), Vol. 13 No. 1 (2016): What are we meaning by Curriculum?
Basic and clinical study of warm acupuncture in Mongolian medicine in improving cognitive impairment of neuropathic pain
Creators: name: 钢苏和(Gangsuhe)
Publisher: name: CNGB
Year: 2023
Subjects: Raw sequence reads
Targeted loci cultured
Multispecies
Medical

description: Sciatica is a common form of neuropathic pain that is usually persistent or recurrent. Long-term drug use may cause drug dependence and adverse drug reactions, and the disease is prone to relapse after drug withdrawal. The overall safety and efficacy are still controversial. "Neuropathic pain" belongs to "Heyi" pain in Mongolian medicine, and cognitive impairment is more common in patients with "Heyi" pain. Neuropathic pain is often accompanied by cognitive impairment, which aggravates the decline in the quality of life of patients with neuropathic pain and increases the complexity of treatment. Our previous studies have shown that warm acupuncture in Mongolian medicine can improve mechanical abnormal pain of neuropathic pain induced by chronic compression injury of sciatic nerve (CCI). The detailed mechanism related to the joint healing effect of warm on 'Heyi' pain and cognitive impairment is related to cognition and pain. But the mechanism is unknown. This project intends to take animal models as research objects to observe the effect of Mongolian medicine warm acupuncture in improving the cognitive impairment of "Heyi" pain type, and further explore the molecular mechanism of Mongolian medicine warm acupuncture in improving the cognitive impairment of "Heyi" pain type by using 16SrDNA technology from the changes of intestinal microflora. This study will provide a clear modern biological theoretical support for the treatment of "Heyi pain type" cognitive impairment with warm acupuncture in traditional Mongolian medicine, and provide a research direction for new indications of warm acupuncture
title: VerLaPro – a 3D model of the shallow Paleozoic subsurface in the southern Ruhr Area
Creators: name: Kaufmann , Dirk
name: Rakers , Christian
name: Linder , Bernd
name: Mengede , Stefan
name: Schaefer , Karsten
name: Wagener , Daniel
name: Isaac , Martin
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: For decades the Ruhr Area in western Germany was dominated by extensive coal mining. Today, relicts of abandoned mines and the near-surface cavities are a hazard factor, for example at building sites. For an assessment of potential risks, the regional mining authority needs very detailed geological data. The calculation is based on the exact position of the coal seams at the Carboniferous surface and its loose rock covering. To provide this, a very detailed 3D model of the shallow Paleozoic underground is build, reaching down to about 100 m. The Upper Carboniferous coal-bearing units were influenced by multiple phase tectonics and these complex structures were challenging to visualise and to model. Heterogeneous data of old mining sites, including plans of mine shafts as well as data of surface opening shafts, are combined with existing geological data and a high-resolution digital terrain model (cell size 1 m) in SKUA-GOCAD software. Challenging for the modelling process are the variable data types, scales and spatial accuracies. For example, plans of the mine shafts are partly older than 200 years and passed through numerous processing steps which had an impact on the positional accuracy. To harmonise the data, a manual constructed profile section network is used and a homogeneous data distribution is developed. The result is a 3D model of the shallow subsurface in the southern Ruhr Area with complex tectonic elements, combining geological and mining data. In accordance with the Geologiedatengesetz (GeolDG, 2020) all results will be stored and published in a GIS-database.
Advanced Finite-Temperature Lanczos Method for anisotropic spin systems
Creators: name: Hanebaum, O.
name: Schnack, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: It is virtually impossible to evaluate the magnetic properties of large anisotropic magnetic molecules numerically exactly due to the huge Hilbert space dimensions as well as due to the absence of symmetries. Here we propose to advance the Finite-Temperature Lanczos Method (FTLM) to the case of single-ion anisotropy. The main obstacle, namely the loss of the spin rotational symmetry about the field axis, can be overcome by choosing symmetry related random vectors for the approximate evaluation of the partition function. We demonstrate that now thermodynamic functions for anisotropic magnetic molecules of unprecedented size can be evaluated.
description: 7 pages, 6 figures
HST and LAMOST discover a dual active galactic nucleus in J0038+4128
Creators: name: Huang, Y.
name: Liu, X. -W.
name: Yuan, H. -B.
name: Xiang, M. -S.
name: Huo, Z. -Y.
name: Hou, Y. -H.
name: Jin, G.
name: Zhang, Y.
name: Zhou, X. -L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the discovery of a kiloparsec-scale dual active galactic nucleus (AGN) in J0038+4128. From the Hubble Space Telescope (HST) Wide Field Planetary Camera (WFPC2) images, we find two optical nuclei with a projection separation of 4.7 kpc (3.44 arcsec). The southern component (J0038+4128S) is spectroscopically observed with the HST Goddard High Resolution Spectrograph in the UV range and is found to be a Seyfert 1 galaxy with a broad Ly alpha emission line. The northern component (J0038+4128N) is spectroscopically observed during the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (also named the Guoshoujing Telescope) pilot survey in the optical range. The observed line ratios as well as the consistency of redshift of the nucleus emission lines and the host galaxy's absorption lines indicate that J0038+4128N is a Seyfert 2 galaxy with narrow lines only. These results thus confirm that J0038+4128 is a Seyfert 1-Seyfert 2 AGN pair. The HST WFPC2 F336W/U-band image of J0038+4128 also reveals for the first time for a dual AGN system two pairs of bi-symmetric arms, as are expected from the numerical simulations of such system. Being one of a few confirmed kiloparsec-scale dual AGNs exhibiting a clear morphological structure of the host galaxies, J0038+4128 provides an unique opportunity to study the co-evolution of the host galaxies and their central supermassive black holes undergoing a merging process.
description: 6 pages, 4 figures, 2 tables, Accepted for publication in MNRAS Letters
Utilization of a nurse-driven palliative screening tool in the intensive care unit
Creators: name: Pagaduan, James Earl
Publisher: name: No Publisher Supplied
Year: 2023

description: Purpose of the Project: The standard use of a palliative screening tool that contains triggers fosters early patient recognition for a palliative referral. Yet despite national guidelines that elevate the use of palliative trigger criteria, practice gaps exist widely across practice settings, leaving patients with unmet palliative needs. A voluntary palliative referral by the intensivists was the practiced norm at the project site, but little was known of its efficacy. The purpose of the project focused on standardizing the structure and process of referral through a nurse-driven palliative screening tool to enhance early referral and promote timely goals-of-care discussions with patients and families. Methodology: Pre- and post-implementation surveys measured critical care nurses’ screening comfort level, and the screening tool’s usability, productivity, acceptability, and sustainability, respectively. A comparison of records from 200 admitted ICU patients in a pre-and post-implementation design illustrated the value of a nurse-driven palliative screening within a six-week project duration. The primary outcome measures focused on palliative referral rate, referral timeliness, the prompting of, and initiation of a goals-of-care discussion, and the end outcome. Results: The pre-implementation survey on screening comfortability (N = 50) showed that most respondents were strongly comfortable (n = 22, 44%), comfortable (n = 21, 42%), and neutral (n = 7, 14%). A statistically significant variation between the two groups in palliative referral rate (X2(1) = 120.22, p = .000, Phi = .97), timeliness in referral and subsequent consultation (t = 3.10(9), p = .013), and incidence of goals-of-care discussions (10% to 59%), with symptom management as the leading end-outcome (X2(1) = 14.78, p = .000, Phi = .46) were apparent. The post-implementation survey (N = 50) revealed that respondents strongly agreed the tool was easy to use (n = 49, 98%), and would recommend its continued use (n = 47, 94%).Implications for Practice: The execution of the intervention and its favorable results supports the utility of a nurse-driven palliative screening tool in the objective recognition of patients that will likely benefit from palliative care.
Education in an Era of Climate Change: Conversing with Ten Thousand Voices
Creators: name: Cole, Peter
Publisher: name: TCI (Transnational Curriculum Inquiry)
Year: 2016

description: what are our tasks and responsibilities as curriculum scholars in addressing the ecological crisis facing life on the planet? is there any possibility for post-imperialist post-development post-progress education in the prevailing schooling systems that are grounded in Euro-centric anthropocentric neoliberal knowledge systems? how might traditional ecological knowings of Indigenous Peoples worldwide contribute to holistic education that values human non-human and more-than-human intelligences and agencies? this paper presents a theoretical framework to discuss these questions.
description: TCI (Transnational Curriculum Inquiry), Vol. 13 No. 1 (2016): What are we meaning by Curriculum?
Tunneling-assisted optical information storage with lattice polariton solitons in cavity-QED arrays
Creators: name: Sedov, E. S.
name: Alodjants, A. P.
name: Arakelian, S. M.
name: Chuang, Y. -L.
name: Lin, Y. Y.
name: Yang, W. -X.
name: Lee, R. -K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Considering two-level media in the array of weakly coupled nano-cavities, we reveal a variety of dynamical regimes, such as diffusion, self-trapping, soliton, and breathers for the wave-packets in the presence of photon tunneling processes between the next-nearest cavities. We focus our attention on the low branch (LB) bright polariton soliton formation, due to the two-body polariton-polariton scattering processes. When detuning frequency is manipulated adiabatically, the low-branch lattice polariton localized states, i.e., that are solitons and breathers evolving between photon-like and matter-like states, are shown to act as carriers for spatially distributed storage and retrieval of optical information.
description: 10 pages, 7 figures
Assessment of critical resource use in aircraft manufacturing
Creators: name: Dolganova, Iulia
name: Bach, Vanessa
name: Rödl, Anne
name: Kaltschmitt, Martin
name: Finkbeiner, Matthias
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: aircraft
subject: resources
subject: ESSENZ
subject: criticality
subject: life cycle assessment

description: The global aircraft fleet has been expanding worldwide, leading to a high demand for primary resources. Simultaneously, recycling initiatives for decommissioned aircraft are still incipient. Following circular economy principles, the aims of this paper are to identify potentially critical resources used and related environmental impacts, to derive recommendations regarding recycling, and to analyze the influence of increasing utilization of lightweight composite materials in aircraft manufacturing. It was identified that the engine is the structure containing resources with the highest scarcity, with tantalum dominating seven of the eleven analyzed impact categories. Aluminum, titanium, and nickel were shown to lead to the highest environmental impacts. Hotspots in the criticality and environmental assessment often occur due to alloying resources with a low mass share. It was shown that aluminum and steel alloy recycling should be prioritized. A higher lightweight composite material share in the aircraft increases impacts in the categories climate change and fossil resource depletion by 12% and 20%, respectively, whereas the impact of the category acidification, political stability, and demand growth decreases by 16%, 35%, and 60%, respectively.
Legal design e sanit� digitale: un innovativo approccio per favorire la tutela dei dati personali
Creators: name: Traverso, Francesco
Publisher: name: Universit� degli Studi di Trento. Facolt� di Giurisprudenza
Year: 2021

description: Digital technologies and their use in health care can significantly improve the quality of our life. In order to be effective, digital technologies need to analyze a huge amount of data. However, people might be kept in the dark about the processing of their personal data, while they have the right to know how data are processed and who processes them. Legal design is an innovative approach that allows to make legal documents, like laws and contracts, easy for people to understand. The origins of legal design can be found in the principles of design thinking and human-centered-design, the methods that designers use to create products that satisfy user needs. According to legal design, lawyers create legal documents as much as possible understandable even to people that are not expert in law. In order to achieve this goal, lawyers work in multidisciplinary teams, which include designers and people with different competences. This is the way to assure that everyone can fully understand the meaning of a contract or of a legal rule. The quality and understandability of the information related to the processing of personal data is a key factor to protect individual privacy. According to the Regulation (EU) 2016/679, which has been adopted in all European member states, the processing of personal data is lawful only if takes place in compliance with the principle of transparency. The clarity of information is vital especially in the case a special category of data, the health data, which according to the Regulation must be treated with utmost care. Moreover, legal design, by keeping people promptly, continuously, and precisely informed on how their personal health data are treated, not only guarantees privacy, but also promotes and opens up the possibility to use digital instruments like the Electronic Heath Record (EHR), which can significantly improve patients? health. The comparison with German law allows us to better understand the key role of legal design in health data protection and in the use of the EHR, a digital instrument that is increasingly important also in our country. To keep people informed about the way their data are processed is essential to avoid heavy penalties imposed by the Regulation and to promote the use of digital technology in the market. Legal design can also help visually impaired people to access privacy policies. In conclusion, legal design is therefore a crucial element to guarantee data protection. In the digital age, it becomes a key instrument to promote the market development, but above all individual freedom and an active participation of people in society.
Performance Study of Mobile TV over Mobile WiMAX Considering Different Modulation and Coding Techniques
Creators: name: Hamodi, Jamil
name: Thool, Ravindra
name: Salah, Khaled
name: Alsagaf, Anwar
name: Holba, Yousef
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: With the advent of the wide-spread use of smart phones, video streaming over mobile wireless networks has suddenly taken a huge surge in recent years. Considering its enormous potential, mobile WiMAX is emerging as a viable technology for mobile TV which is expected to become of key importance in the future of mobile indus- try. In this paper, a simulation performance study of Mobile TV over mobile WiMAX is conducted with different types of adaptive modulation and coding taking into account key system and environment parameters which include the variation in the speed of the mobile, path-loss, scheduling service classes with the fixed type of mod- ulations. Our simulation has been conducted using OPNET simulation. Simulation results show that dynamic adaptation of modulation and coding schemes based onchannel conditions can offer considerably more en- hanced QoS and at the same time reduce the overall bandwidthof the system.
description: 12 pages, 9 figures. arXiv admin note: substantial text overlap with arXiv:1312.7442; and text overlap with arXiv:1005.0976 by other authors
title: Book review : Fagan, Jenni. (2012), The Panopticon. London: Windmill Books. 324 pp, ISBN-13: 9780099558644 ISBN: 0099558645
Creators: name: Roesch-Marsh, Autumn
Publisher: name: Strathprints - University of Strathclyde
Year: 2014

description: The Panopticon by Edinburgh poet and writer Jenni Fagan is not for the faint hearted. It is a novel about a 15-year-old girl named Anais who is living in a residential care home on the outskirts of a large Scottish city, and Jenni Fagan has been very open about the fact that it draws on some of her experiences of being in residential care. As someone who has worked in residential care, I recognised in Anais so many of the young women I have met in residential units. She is fierce and at times frightening and yet incredibly vulnerable and traumatised from a lifetime of abuse and loss. She is smart and resilient and at the same time her behaviour can be erratic and extremely dangerous to herself and others. Anais is the narrator of her own story and the story includes flashbacks to key moments in her life, including the murder of her foster mother and the loss of her best friend. When we meet Anais she has just spent the night in the police cells after attacking a police officer. Anais cannot remember exactly what happened as she was under the influence of drugs and alcohol at the time. As she approaches the front door of the residential home she says, 'My heart's going. I've moved fifty-one fucking times now, but every time I walk through a new door I feel exactly the same – two years old and ready tae bite' (p. 9). For me this description of feeling 'two years old and ready tae bite' encapsulates the way that so many children who have been shunted around the care system from an early age must feel on the inside. Having missed out on early nurture, security and love, their inner world often resembles that of an angry, uncontained toddler, desperate for love and care but biting out in terror and fear of further rejection, abuse and loss.
From Telescope to Kaleidoscope: Post-structural Strategies for Bringing Multiplicity to Light in Teaching and Research
Creators: name: Smythe, Jon L.
Publisher: name: TCI (Transnational Curriculum Inquiry)
Year: 2016

description: A note on Purdue’s OWL (Online Writing Lab) (2014) website describes post-structuralism as one of the “most complex literary theories to understand” and as such the reader is directed to “Please be patient” when attempting to comprehend it (Purdue OWL: Literary Theories, online). Indeed, poststructuralism has a reputation for being both mysterious and daunting. Yet, I argue that post-structuralism can also be accessible, playful, and relevant for both teaching and educational research in local and transnational settings. Opening up dualistic language structures and cultural labels can engender a shift in thinking from a singular, exclusionary, and telescopic perspective to one that is more inclusive, pluralistic, and kaleidoscopic. It can also lead to more ethical approaches to the processes of education by working to explore the relationships among meaning, power, and perceived differences. This is especially important in the continually diversifying education systems in which educators currently find themselves, where varying cultural, linguistic, and socioeconomic factors come into play. Translating post-structural theory into practice, I demonstrate different post-structural strategies I have used to deconstruct the narratives of four transnational Returned Peace Corps Volunteer teachers who have taught both in the U.S. and in other countries. I also share examples from my American college and university classrooms, in which students have struggled and succeeded to see past the dualisms in order to locate the multiplicity within.
description: TCI (Transnational Curriculum Inquiry), Vol. 12 No. 2 (2015): Ottawa Curriculum Conference
Integrated weld preparation designs for the joining of L-PBF and conventional components via TIG welding
Creators: name: Geisen, Ole
name: Müller, Vinzenz
name: Graf, Benjamin
name: Rethmeier, Michael
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: L-PBF
subject: Inconel 625
subject: TIG welding
subject: dissimilar joints
subject: pipe weld preparation
subject: integrated alignment features
subject: AM feature integration

description: Laser powder bed fusion (L-PBF) of entire assemblies is not typically practical for technical and economic reasons. The build size limitations and high production costs of L-PBF make it competitive for smaller, highly complex components, while the less complex elements of an assembly are manufactured conventionally. This leads to scenarios that use L-PBF only where it’s beneficial, and it require an integration and joining to form the final product. For example, L-PBF combustion swirlers are welded onto cast parts to produce combustion systems for stationary gas turbines. Today, the welding process requires complex welding fixtures and tack welds to ensure the correct alignment and positioning of the parts for repeatable weld results. In this paper, L-PBF and milled weld preparations are presented as a way to simplify the Tungsten inert gas (TIG) welding of rotationally symmetrical geometries using integrated features for alignment and fixation. Pipe specimens with the proposed designs are manufactured in Inconel 625 using L-PBF and milling. The pipe assembly is tested and TIG welding is performed for validation. 3D scans of the pipes before and after welding are evaluated, and the weld quality is examined via metallography and computed tomography (CT) scans. All welds produced in this study passed the highest evaluation group B according to DIN 5817. Thanks to good component alignment, safe handling, and a stable welding process, the developed designs eliminate the need for part-specific fixtures, simplify the process chain, and increase the process reliability. The results are applicable to a wide range of components with similar requirements.
The extended ROSAT-ESO Flux Limited X-ray Galaxy Cluster Survey (REFLEX II) IV. X-ray Luminosity Function and First Constraints on Cosmological Parameters
Creators: name: Böhringer, H.
name: Chon, G.
name: Collins, C. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The X-ray luminosity function is an important statistic of the census of galaxy clusters and an important means to probe the cosmological model of our Universe. Based on our recently completed REFLEX II cluster sample we construct the X-ray luminosity function of galaxy clusters for several redshift slices from $z = 0$ to $z = 0.4$ and discuss its implications. We find no significant signature of redshift evolution of the luminosity function in the redshift interval. We provide the results of fits of a parameterized Schechter function and extensions of it which provide a reasonable characterization of the data. Using a model for structure formation and galaxy cluster evolution we compare the observed X-ray luminosity function with predictions for different cosmological models. For the most interesting constraints for the cosmological parameters $Ω_m$ and $σ_8$ we obatain $Ω_m \sim 0.27 \pm 0.03$ and $σ_8 \sim 0.80 \pm 0.03$ based on the statistical uncertainty alone. Marginalizing over the most important uncertainties, the normalisation and slope of the $L_X - M$ scaling relation, we find $Ω_m \sim 0.29 \pm 0.04$ and $σ_8 \sim 0.77 \pm 0.07$ ($1σ$ confidence limits). We compare our results with those of the SZ-cluster survey provided by the PLANCK mission and we find very good agreement with the results using PLANCK clusters as cosmological probes, but we have some tension with PLANCK cosmological results from the microwave background anisotropies. We also make a comparison with other cluster surveys. We find good agreement with these previous results and show that the REFLEX II survey provides a significant reduction in the uncertainties compared to earlier measurements.
description: Submitted for publication to Astronomy and Astrophysics, 15 pages, 17 figures
Linguistica Atlantidea
Creators: name: Usai, Luigi
Publisher: name: Zenodo
Year: 2024

description: Questo studio esplora le somiglianze fonologiche tra lingue moderne e presunti elementi linguistici dell'antica Atlantide, con un focus particolare sui suoni e le lettere che potrebbero suggerire un legame storico o culturale. Ci si focalizza sulla filogenesi mondiale delle lingue atlantidee derivate dalle espansioni dei popoli che abitavano l'isola sardo-corso-atlantidea verso tutta Europa e il resto del mondo. Analizziamo la presenza della lettera "U" in diverse lingue, il suono "J" del francese, e il suono "Ж" del russo per identificare eventuali tracce di una lingua atlantidea. Esaminiamo inoltre le implicazioni di tali somiglianze per le teorie sull'esistenza e l'influenza di Atlantide. Inoltre, consideriamo l'importanza storica e linguistica di "Sa Die de sa Sardigna" e i "Vespri Siciliani" per arricchire il contesto linguistico. Ipotesi sull'origine dei nomi Michele e Antonio ad Atlantide. Origine atlantidea del termine Papperi (carta, in sardo campidanese e sulcitano), poi passato ai Siciliani col termine Pappera, poi esportato in Egitto e trasmesso ad oggi in italiano come Papiro, usato come carta: l'origine atlantidea del termine è andata perduta irrimediabilmente, e i linguisti non sono più in grado di capirne la vera origine atlantidea. L'origine atlantidea del cognome Usai nella Mummia Usai di Bologna e Sa Meri; l'origine postnuragica post-ebraica dei bronzetti nuragici a corredo della Mummia Usai. Origine atlantidea del termine "matza", "matzosu" legato al pane sardo ed ebraico. Gli Atlantidei assassinavano nei millenni le persone che dimostravano di non saper pronunciare determinate parole: Shibboleth, raccontato nel Libro dei Giudici della Bibbia; "Nara Cixiri", durante Sa Die de sa Sardigna e durante i Vespri Siciliani. Possibile origine atlantidea dei toponimi Aqaba, Zaafarana, Sinai, El Toro, Conseguenze scientifiche, linguistiche, geografiche, storiche, politiche e culturali in caso di validazione di queste scoperte.
Full counting statistics in the not-so-long-time limit
Creators: name: Carr, Sam T.
name: Schmitteckert, Peter
name: Saleur, Hubert
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The full counting statistics of charge transport is the probability distribution $p_n(t_m)$ that $n$ electrons have flown through the system in measuring time $t_m$. The cumulant generating function (CGF) of this distribution $F(χ,t_m)$ has been well studied in the long time limit $t_m\rightarrow \infty$, however there are relatively few results on the finite measuring time corrections to this. In this work, we study the leading finite time corrections to the CGF of interacting Fermi systems with a single transmission channel at zero temperature but driven out of equilibrium by a bias voltage. We conjecture that the leading finite time corrections are logarithmic in $t_m$ with a coefficient universally related to the long time limit. We provide detailed numerical evidence for this with reference to the self-dual interacting resonant level model. This model further contains a phase transition associated with the fractionalisation of charge at a critical bias voltage. This transition manifests itself technically as branch points in the CGF. We provide numerical results of the dependence of the CGF on measuring time for model parameters in the vicinity of this transition, and thus identify features in the time evolution associated with the phase transition itself.
description: 15 pages, 11 figures. Submitted to proceedings of FQMT13
Enhanced Kerr effect in vertically aligned deformed helix ferroelectric liquid crystals
Creators: name: Pozhidaev, E. P.
name: Srivastava, A. K.
name: Kiselev, Alexei D.
name: Chigrinov, V. G.
name: Vashchenko, V. V.
name: Krivoshey, A. I.
name: Minchenko, M. V.
name: Kwok, H. -S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We disclose the vertically aligned deformed helix ferroelectric liquid crystal (VADHFLC) whose Kerr constant ($K_{\mathrm{kerr}}\approx 130$~nm/V$^2$ at $λ=543$~nm) is one order of magnitude higher than any other value previously reported for liquid crystalline structures. Under certain conditions, the phase modulation with ellipticity less than 0.05 over the range of continuous and hysteresis free electric adjustment of the phase shift from zero to 2$π$ have been obtained at sub-kilohertz frequency.
description: revtex4-1, 4 pages, 5 figures
Variational Approach to Localization Length for Two-Dimensional Hubbard Model
Creators: name: Tamura, Shun
name: Hisatoshi, Yokoyama
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: As a measure to ascertain whether a system is metallic or insulating, localization length $λ_N$, which represents the spread of electron distribution, can be a useful quantity, especially for approaching a metal-insulator transition from the insulator side. We try to calculate $λ_N$ using a variational Monte Carlo method for normal (paramagnetic), superconducting and antiferromagnetic states in the square-lattice Hubbard model. It is found that the behavior of $λ_N$ is consistent with what is expected from other quantities, and gives information complementary to another measure, the Drude weight.
description: 6 pages, 4 figures, accepted for JPSJ Supplement
title: Multi-proxy, localised reconstructions of climate and weathering from cave speleothem samples
Creators: name: Day , Christopher
name: von Strandmann , Philip Pogge
name: Lechleitner , Franziska
name: Stoll , Heather
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: Speleothems (secondary calcium carbonate formations) offer significant potential for recording environmental processes above caves, an area increasingly referred to as the Critical Zone. Speleothems grow for hundreds to millions of years, with absolute chronology from U-Th and U-Pb chronometers. The solution properties of rainwater infiltrating the soil and underlying caves respond to environmental controls. These environmental signals can be preserved within speleothem carbonates. Recent efforts to calibrate, model and interpret this complex geochemistry has progressed along multiple paths. Here we bring together recent examples, including: i) calibrating and using Li isotopes for reconstructing weathering intensity [1,2]; ii) the use of Ca isotopes for reconstructing changes in rainfall amount [3]; iii) the combined use of d13C, 14C and d44Ca to demonstrate changes in soil respiration [4]. Combining these proxies provides the potential of regional-scale input into climate, weathering and the chemical cycling of elements, on timescales from thousands to millions of years. [1] C.C. Day et al. Lithium isotopes and partition coefficients in inorganic carbonates: proxy calibration for weathering reconstruction. GCA. [2] P.A.E. Pogge von Strandmann et al. 2017. Lithium isotopes in speleothems: Temperature-controlled variation in silicate weathering during glacial cycles. EPSL. 469, 64–74. [3] R.A. Owen et al. 2016. Calcium isotopes in caves as a proxy for aridity: Modern calibration and application to the 8.2 kyr event. EPSL, 443, 129–138. [4] F.A. Lechleitner et al. (in review). Stalagmite carbon isotopes suggest deglacial increase in soil respiration in Western Europe driven by temperature change. Climate of the Past.
High abundance ratio of $^{13}$CO to C$^{18}$O toward photon-dominated regions in the Orion-A giant molecular cloud
Creators: name: Shimajiri, Yoshito
name: Kitamura, Yoshimi
name: Saito, Masao
name: Momose, Munetake
name: Nakamura, Fumitaka
name: Dobashi, Kazuhito
name: Shimoikura, Tomomi
name: Nishitani, Hiroyuki
name: Yamabi, Akifumi
name: Hara, Chihomi
name: Katakura, Sho
name: Tsukagoshi, Takashi
name: Tanaka, Tomohiro
name: Kawabe, Ryohei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims. We derive physical properties such as the optical depths and the column densities of $^{13}$CO and C$^{18}$O to investigate the relationship between the far ultraviolet (FUV) radiation and the abundance ratios between $^{13}$CO and C$^{18}$O. Method. We have carried out wide-field (0.4 deg$^2$) observations with an angular resolution of 25.8 arcsec ($\sim$ 0.05 pc) in $^{13}$CO ($J$=1--0) and C$^{18}$O ($J$=1--0) toward the Orion-A giant molecular cloud using the Nobeyama 45 m telescope in the on-the-fly mode. Results. Overall distributions and velocity structures of the $^{13}$CO and C$^{18}$O emissions are similar to those of the $^{12}$CO ($J$=1--0) emission. The optical depths of the $^{13}$CO and C18O emission lines are estimated to be 0.05 $
description: 11 pages, 9 figures, Accepted to A&A
Meetings, Dialogs and Interconnections in a Theoretical-analytical Perspective Design
Creators: name: Frangella, Rita De Cássia Prazeres
Publisher: name: TCI (Transnational Curriculum Inquiry)
Year: 2016

description: This study aims to present the theoretical concept that supports the researches I develop in the curriculum field starting from what I assume to be its central core: the curriculum as a statement, a discursive practice. Therefore I’ve established a dialog between Homi Bhabha and Ernesto Laclau’s Theory of Discourse. Bhabha’s emphasis on the enunciation issue highlights the shift he proposes. That means it is not a matter of image referring to a transcendental reality, but actually a continuous process of significance. Thus, he also points out that such ambiguity creates a division, duplicity which emerges from the notion of the enunciation disjunctive time: the tension between what he calls pedagogic and performing dimension, such as shift and ambivalence, founded on indetermination. Owing to he undecidability that distinguishes the political game, the decision is made through the other, by relating with the difference. The ideas of undecidability and temporary closures allow to articulate Bhabha’s propositions with Laclau’s proposed analysis. Placing the curriculum issue in this theoretical framework allows to avoid understanding curricular policy production as a polarized fight of excluding forces, the hegemonic one (prescription emerging from power) and the couter-hegemonic (pedagogic practice of schools) as fixed entities. Such apprehension enables to understand that curricular production contexts are established and informed by multiple discursive significances as well as that inside such contexts the difference moves and is identified by contingent demands, which produce temporary articulations, instituting momentary agreement forged by what the authors denominate as significance work.
description: TCI (Transnational Curriculum Inquiry), Vol. 12 No. 2 (2015): Ottawa Curriculum Conference
On Large-Scale Dynamo Action at High Magnetic Reynolds Number
Creators: name: Cattaneo, Fausto
name: Tobias, Steven
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We consider the generation of magnetic activity --- dynamo waves --- in the astrophysical limit of very large magnetic Reynolds number. We consider kinematic dynamo action for a system consisting of helical flow and large-scale shear. We demonstrate that large-scale dynamo waves persist at high $Rm$ if the helical flow is characterised by a narrow band of spatial scales and the shear is large enough. However for a wide band of scales the dynamo becomes small-scale with a further increase of $Rm$, with dynamo waves re-emerging only if the shear is then increased. We show that at high $Rm$ the key effect of the shear is to suppress small-scale dynamo action, allowing large-scale dynamo action to be observed. We conjecture that this supports a general "suppression principle" --- large-scale dynamo action can only be observed if there is a mechanism that suppresses the small-scale fluctuations.
description: Astrophysical Journal in Press
Oseledets splitting and invariant manifolds on fields of Banach spaces
Creators: name: Varzaneh, Mazyar Ghani
name: Riedel, S.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 510 Mathematik
subject: semi-invertible multiplicative ergodic theorem
subject: oseledets splitting
subject: fields of Banach spaces
subject: invariant manifolds

description: We prove a semi-invertible Oseledets theorem for cocycles acting on measurable fields of Banach spaces, i.e. we only assume invertibility of the base, not of the operator. As an application, we prove an invariant manifold theorem for nonlinear cocycles acting on measurable fields of Banach spaces.
Dewey’s Trip to China: A Rejuvenation of his Democratic Spirit
Creators: name: Fu, Guopeng
Publisher: name: TCI (Transnational Curriculum Inquiry)
Year: 2016

description: John Dewey and his wife Alice visited China in 1919 and extended the sojourn into a two-year stay. This trip, according to Westbrook (1991), recharged his political energy in international democracy. This paper depicts a comprehensive picture of Dewey’s Far East trip in order to reveal the causes of his extended stay. His political frustrations from President Wilson’s administration in World War I, his three-month trip in Japan, his involvement in the May Fourth Movement in China, and his immersion in Chinese traditional philosophy constitute Dewey’s journey of rejuvenation to democratic spirit. After returning from China, Dewey was revitalized and integrate a more comprehensive experience into his philosophy of experimental intelligence.
description: TCI (Transnational Curriculum Inquiry), Vol. 12 No. 2 (2015): Ottawa Curriculum Conference