bluuebunny/crossref_metadata_2025_split huggingface dataset:
Barriers to Widespread Adoption of Fab City Products
Authors: Klein Marvin , Lüthje Christian 
Published: April 2024

AbstractFor the Fab City Initiative to be a success story, many citizens must internalize its vision. Thus, a key success factor is the widespread adoption of user-generated Fab Lab products. However, user innovators have currently little incentive to bear the cost of active diffusion efforts which leads to welfare losses. To overcome this so-called diffusion shortfall, we present promising voluntary payment mechanisms that could act as a decisive incentive for user innovators without losing the idea of an open community and give respective research directions. Moreover, we discuss potential adoption barriers of end users (e.g., safety or quality concerns) and suggest how a trusted Fab City seal might be helpful in overcoming them.
What Kind of City is the Fab City?
Authors: Buxbaum-Conradi Sonja 
Published: April 2024

AbstractThis contribution analyzes the rationale behind the Fab City Project as well as the mobilizations that it has created and grounds it in prior theoretical work and related imaginations of cities in the field of urban anthropology and urban transformation. The main aim is to provide a more consistent and scientifically profound integrative framework to which future research from different disciplines can relate serving as a common ground of what can be understood as a Fab City. The focus is predominantly set on the alternative model of urban functioning that the Fab City project introduces. This model suggests the rethinking and reorganization of production and consumption processes – or the reorganization of flows – in a cosmo-local urban space.
Creative Flows
Authors: Roio Denis , Salomone Micol , Lucarelli Stefano 
Published: April 2024

AbstractWe envision a scalable economic model based on participatory economic theories that can sustain the distributed design and production of software and hardware based on the free and open-source ethos. Beyond licensing, we imagine a model that rewards people making contributions to projects for which free markets have a demand. The underpinnings of our model are abundance and shared information, whereas we see scarcity and accumulation of knowledge as the shortcomings of economic models currently applied to most free markets. We name this model Creative Flows, and we propose it for adoption in the Fab City network through the implementation of Fab City OS.
BtB-Marketing als eigenständige Teildisziplin des Marketings
Authors: Laschet Fabio-Yannick 
Published: April 2024

ZusammenfassungObgleich das BtB-Marketing einen originären Vermarktungsansatz erfordert, ist es zugleich als eine Teildisziplin des allgemeinen Marketings einzuordnen. Für ein grundlegendes Verständnis des BtB-Marketings bedarf es somit zunächst einer Reflexion des Grundverständnisses des Marketings. Die weithin etablierte und dieser Arbeit zugrundeliegende Auffassung definiert Marketing als Konzept der marktorientierten Unternehmensführung.
Empirische Studien zu Noncomplainern im BtB-Kontext
Authors: Laschet Fabio-Yannick 
Published: April 2024

ZusammenfassungIn den vorangegangenen zwei Kapiteln wurden die begrifflichen und theoretischen Grundlagen – einerseits bezüglich des BtB-Marketings sowie des organisationalen Beschaffungsverhaltens und andererseits des Beschwerdemanagements und insb. des Noncomplainings – dargestellt und die mit der vorliegenden Arbeit in Zusammenhang stehenden Forschungsdefizite angestoßen. Hierauf aufbauend setzt das folgende Kapitel das fokale Anliegen dieser Arbeit in den Vordergrund: die empirische Untersuchung der bisher aufgeworfenen und andiskutierten Fragestellungen.
Diskussion der Ergebnisse und Handlungsimplikationen für Theorie und Praxis
Authors: Laschet Fabio-Yannick 
Published: April 2024

ZusammenfassungDie übergeordnete Zielsetzung der vorliegenden Arbeit war es, Noncomplainer im BtB-Bereich vor dem Hintergrund der marktorientierten Unternehmensführung und damit verbundener, ausgewählter Einflussfaktoren zu untersuchen. Konkret sollten zunächst angesichts der vorherrschenden Besonderheiten des BtB-Marketings Antezedenzien des organisationalen Noncomplainings identifiziert werden. Hierbei wurde im Anschluss an eine qualitative Pilotstudie in den quantitativen Erhebungen eins und 2a die Koexistenz individueller bzw. persönlichkeits- und gruppenstrukturbezogener Variablen fokussiert.
Schlussbetrachtung
Authors: Laschet Fabio-Yannick 
Published: April 2024

ZusammenfassungDer Wandel, in dem sich nicht nur Konsumgüter-, sondern auch BtB-Märkte befinden, stellt Anbieter angesichts sich verändernder Kundenerwartungen vor neue Herausforderungen. Eine Möglichkeit, um diesen entgegnen zu können, stellt ein ausgeprägtes Wissen über aktuelle und potenzielle Kunden dar. Vor diesem Hintergrund können Noncomplainer, die ihre Unzufriedenheit nicht unmittelbar an den Anbieter artikulieren, als eine wertvolle Informationsquelle gesehen werden. Zudem können Noncomplainer die Erreichung psychografischer und ökonomischer Zielgrößen massiv gefährden.
Natur und ihre Erkenntnis
Authors: Marzi Thomas , Renner Manfred 
Published: April 2024

ZusammenfassungWie das vorangehende Kapitel gezeigt hat, wird sowohl in der Bioökonomie wie in Teilen der Circular Economy auf die Natur Bezug genommen und mit ihr argumentiert. Bevor wir untersuchen, welche Vorstellungen hierzu herangezogen werden, müssen wir uns zunächst allgemein mit den Themen Natur und Naturerkenntnis auseinandersetzen. Wissen wir überhaupt, was Natur eigentlich ist?
Institutionen und Kritiken
Authors: Grüny Christian 
Published: April 2024

ZusammenfassungIn einem programmatischen Text von 1970 bringt Daniel Buren die Ambivalenz der Institutionenkritik auf den Punkt: „Dieser Kontext gilt als neutral, weil man nicht an ihn denkt; und doch löst sich jedes Werk als Werk in nichts auf, wenn es ohne ihn erscheint, also zeitlos und unbegrenzt, ja rein und neutral ist.“ Die Rahmungen oder Institutionen, in denen künstlerische Arbeiten erscheinen, sind alles andere als neutral, sie sind aber auch nicht einfach Verzerrungen künstlerischer Gestaltungen, die ohne sie (je nach Vorliebe) besser, reiner, authentischer, kritischer wären. Sich von ihnen vollständig zu befreien, liefe auf eine Auflösung der Sache heraus, auf die Unmöglichkeit, überhaupt noch etwas als Kunst zu produzieren oder zu rezipieren. Wenn es aber keine reine, rahmen- und institutionslose Kunst gibt, kann ihre Institutionen kritisieren nur bedeuten, sie umzubauen. Eine Voraussetzung dafür ist es, sie erst einmal künstlerisch sichtbar zu machen – ohne dass vorweg klar wäre, welcher Art diese Sichtbarkeit sein könnte, und ohne dass es irgendeine Garantie dafür gäbe, dass sie zu tatsächlichen Veränderungen führt.
Bewegung im Museum
Authors: Grüny Christian 
Published: April 2024

ZusammenfassungDie vorigen beiden Kapitel sind vergleichend vorgegangen, indem sie zur gleichen Zeit entstandene, inhaltlich affine Arbeiten aus verschiedenen Disziplinen unter dem Stichwort der Institutionenkritik nebeneinandergelegt bzw. die verschlungenen Wege der medialen Formation des score in und durch verschiedene künstlerische Disziplinen nachgezeichnet haben. Beide legten ihren Fokus auf die 1960er- und 70er-Jahre. In diesem Kapitel soll es nun um die Gegenwart gehen, und zwar um den Wechsel einzelner Künstler*innen oder ganzer künstlerischer Bewegungen an andere disziplinäre Orte. Man könnte hier allgemein zwischen Touristen, Überläufern und Nomaden unterscheiden: Manche kommen als Gäste, andere richten sich auf Dauer ein; einige wenige führen eine nomadische Existenz, die sich keinem Ort wirklich zuordnen lässt und so den immer wieder neu zu kalibrierenden Umgang mit den unterschiedlichen Vorstellungen, Normen und Genealogien zur eigenen Normalität gemacht hat.
Bounding the Dimension-5 Seesaw Portal with non-pointing photon searches
Authors: Duarte L. , Jones-Pérez J. , Manrique-Chavil C. 
Published: April 2024

Abstract
The addition of d = 5 operators to the Seesaw model leads to the Dimension-5 Seesaw Portal. Here, two new operators provide interactions for the heavy sterile neutrinos. In particular, the Higgs boson can have a large branching ratio into two heavy neutrinos, meaning that these states can be searched for at the LHC. Moreover, the heavy neutrinos can now decay dominantly into light neutrinos and photons. If the heavy neutrinos are long-lived, then searches for delayed, non-pointing photons can constrain the model. In this work, we carry out a detailed recast of an ATLAS search for such displaced photons, triggered by a charged lepton produced in association to the Higgs, placing bounds on the branching ratio for Higgs decay into two heavy neutrinos as low as 2%.
On string theory on deformed BTZ and $$ \textrm{T}\overline{\textrm{T}} $$
Authors: Chakraborty Soumangsu , Giveon Amit , Hashimoto Akikazu 
Published: April 2024

Abstract
Aspects of superstring theory on deformed BTZ black holes, formed near k NS5 branes by p fundamental strings, and single-trace $$ T\overline{T} $$
T

T
¯

holography, are presented. The excitation energy of a singly wound long string plus its contribution to the energy of the black hole, 1/p fraction of the black-hole energy, is the same as that in $$ T\overline{T} $$
T

T
¯

deformed CFT2 with c = 6k. This supports the claim that the black hole can be thought of as a state in a symmetric product of p CFT2’s of central charge 6k, where the black-hole energy is split equally among all p factors. A comment on superstring theory on deformed global AdS3 is also presented.
Supersymmetric index for small black holes
Authors: Chowdhury Chandramouli , Sen Ashoke , Shanmugapriya P. , Virmani Amitabh 
Published: April 2024

Abstract
Supersymmetric elementary string states in the compactified heterotic string theory are described by small black holes that have zero area event horizon. In this paper we compute the supersymmetric index of such elementary string states using gravitational path integral. The dominant contribution to the path integral comes from an Euclidean rotating black hole solution of the supergravity theory with a finite area event horizon, but the logarithm of the index, computed from the saddle point, vanishes. Nevertheless we show that the solution is singular on certain subspaces of the horizon where higher derivative corrections can be important, and once the higher derivative corrections are taken into account the solution could yield a finite result for the logarithm of the index whose form agrees with the microscopic results up to an overall numerical constant. While the numerical constant is not determined in our analysis, we show that it is independent of the details of the compactification and even the number of non-compact dimensions, in agreement with the microscopic results.
Searching for minicharged particles at the energy frontier with the MoEDAL-MAPP experiment at the LHC
Authors: Kalliokoski Matti , Mitsou Vasiliki A. , de Montigny Marc , Mukhopadhyay Abhinab , Ouimet Pierre-Philippe A. , Pinfold James , Shaa Ameir , Staelens Michael 
Published: April 2024

Abstract
The MoEDAL’s Apparatus for Penetrating Particles (MAPP) Experiment is designed to expand the search for new physics at the LHC, significantly extending the physics program of the baseline MoEDAL Experiment. The Phase-1 MAPP detector (MAPP-1) is currently undergoing installation at the LHC’s UA83 gallery adjacent to the LHCb/MoEDAL region at Interaction Point 8 and will begin data-taking in early 2024. The focus of the MAPP experiment is on the quest for new feebly interacting particles — avatars of new physics with extremely small Standard Model couplings, such as minicharged particles (mCPs). In this study, we present the results of a comprehensive analysis of MAPP-1’s sensitivity to mCPs arising in the canonical model involving the kinetic mixing of a massless dark U(1) gauge field with the Standard Model hypercharge gauge field. We focus on several dominant production mechanisms of mCPs at the LHC across the mass-mixing parameter space of interest to MAPP: Drell-Yan pair production, direct decays of heavy quarkonia and light vector mesons, and single Dalitz decays of pseudoscalar mesons. The 95% confidence level background-free sensitivity of MAPP-1 for mCPs produced at the LHC’s Run 3 and the HL-LHC through these mechanisms, along with projected constraints on the minicharged strongly interacting dark matter window, are reported. Our results indicate that MAPP-1 exhibits sensitivity to sizable regions of unconstrained parameter space and can probe effective charges as low as 8 × 10−4e and 6 × 10−4e for Run 3 and the HL-LHC, respectively.
Convolutional double copy in (anti) de Sitter space
Authors: Liang Qiuyue , Nagy Silvia 
Published: April 2024

Abstract
The double copy is a remarkable relationship between gauge theory and gravity that has been explored in a number of contexts, most notably scattering amplitudes and classical solutions. The convolutional double copy provides a straightforward method to bridge the two theories via a precise map for the fields and symmetries at the linearised level. This method has been thoroughly investigated in flat space, offering a comprehensive dictionary both with and without fixing the gauge degrees of freedom. In this paper, we extend this to curved space with an (anti) de Sitter background metric. We work in the temporal gauge, and employ a modified convolution that involves the Mellin transformation in the time direction. As an example, we show that the point-like charge in gauge theory double copies to the (dS-) Schwarzschild black hole solution.
Approximation by Modified Generalized Sampling Series
Authors: Turgay Metin , Acar Tuncer 
Published: April 2024

AbstractIn the present paper, we introduce a new family of sampling operators, so-called “modified sampling operators”, by taking a function $$\rho $$
ρ
that satisfies the suitable conditions, and we study pointwise and uniform convergence of the family of newly introduced operators. We give the rate of convergence of the family of operators via classical modulus of continuity. We also obtain an asymptotic formula in the sense of Voronovskaja. Moreover, we investigate the approximation properties of modified sampling operators in weighted spaces of continuous functions characterized by $$\rho $$
ρ
function. Finally, we present examples of some kernels that satisfy the appropriate assumptions. At the end, we present some graphical and numerical representations by comparing the modified sampling operators and the classical sampling operators.
Convergence of solutions of a one-phase Stefan problem with Neumann boundary data to a self-similar profile
Authors: Hilhorst Danielle , Roscani Sabrina , Rybka Piotr 
Published: April 2024

AbstractWe study a one-dimensional one-phase Stefan problem with a Neumann boundary condition on the fixed part of the boundary. We construct the unique self-similar solution, and show that starting from arbitrary initial data, solution orbits converge to the self-similar solution.
Effects of CB1 receptor negative allosteric modulator Org27569 on oxycodone withdrawal symptoms in mice
Authors: Scicluna Rhianne L. , Everett Nicholas A. , Badolato Connie J. , Wilson Bianca B. , Bowen Michael T. 
Published: April 2024

Abstract
Rationale/Objectives
Targeting cannabinoid receptor type 1 (CB1R) has shown promise for treating opioid withdrawal symptoms. This study aimed to investigate the efficacy of a specific CB1R negative allosteric modulator (NAM), Org27569, in reducing both naloxone-precipitated and protracted withdrawal symptoms in oxycodone-dependent mice.

Methods
Mice received escalating doses of oxycodone (9–33 mg/kg IP) or saline twice daily for 9 days, followed by a final dose of oxycodone (33 mg/kg) or saline in the morning of day 9. In one cohort, the impact of Org27569 (3, 10, and 30 mg/kg) on naloxone (10 mg/kg IP) precipitated withdrawal symptoms was assessed. In another cohort, Org27569 (3 mg/kg) effects on the acquisition of conditioned place aversion to naloxone (0.6 mg/kg) precipitated opioid withdrawal, on behaviour following a 7–9-day abstinence period, and on naloxone (0.6 mg/kg) precipitated withdrawal-induced escape behaviour in a novel assay were assessed.

Results
Although Org27569 decreased opioid withdrawal-induced jumping at doses of 10 and 30 mg/kg, these effects were confounded by reduced locomotion. At all doses tested, Org27569 had a modest inhibitory effect on gastrointestinal motility. At the lower dose of 3 mg/kg, which was not confounded by locomotor effects, Org27569 did not impact naloxone-precipitated withdrawal-induced jumping, acquisition of oxycodone withdrawal-induced conditioned place aversion, or naloxone-precipitated withdrawal-induced escape behaviour in a novel assay. A clear protracted opioid withdrawal phenotype was not observed in assays of anxiety-like or social behaviour.

Conclusions
Org27569 effects on negative affective-like symptoms were confounded by locomotor effects and effects on gastrointestinal motility were not opioid withdrawal specific. Further studies are needed in a model that produces a more pronounced protracted withdrawal syndrome.
Mixed-phase weak anion-exchange/reversed-phase LC–MS/MS for analysis of nucleotide sugars in human fibroblasts
Authors: Rahm Moritz , Kwast Hanneke , Wessels Hans J. C. T. , Noga Marek J. , Lefeber Dirk J. 
Published: April 2024

AbstractNucleotide sugars (NS) fulfil important roles in all living organisms and in humans, related defects result in severe clinical syndromes. NS can be seen as the “activated” sugars used for biosynthesis of a wide range of glycoconjugates and serve as substrates themselves for the synthesis of other nucleotide sugars. NS analysis is complicated by the presence of multiple stereoisomers without diagnostic transition ions, therefore requiring separation by liquid chromatography. In this paper, we explored weak anion-exchange/reversed-phase chromatography on a hybrid column for the separation of 17 nucleotide sugars that can occur in humans. A robust and reproducible method was established with intra- and inter-day coefficients of variation below 10% and a linear range spanning three orders of magnitude. Application to patient fibroblasts with genetic defects in mannose-1-phosphate guanylyltransferase beta, CDP-l-ribitol pyrophosphorylase A, and UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase showed abnormal levels of guanosine-5′-diphosphate-α-d-mannose (GDP-Man), cytidine-5′-diphosphate-l-ribitol (CDP-ribitol), and cytidine-5′-monophosphate-N-acetyl-β-d-neuraminic acid (CMP-Neu5Ac), respectively, in consonance with expectations based on the diagnosis. In conclusion, a novel, semi-quantitative method was established for the analysis of nucleotide sugars that can be applied to diagnose several genetic glycosylation disorders in fibroblasts and beyond.
Diagnostic utility of 3D MRI sequences in the assessment of central, recess and foraminal stenoses of the spine: a systematic review
Authors: Nevalainen Mika T. , Vähä Juho , Räsänen Lasse , Bode Michaela K. 
Published: April 2024

Abstract
Objective
To perform a systematic literature review on the diagnostic utility of 3D MRI sequences in the assessment of central canal, recess and foraminal stenosis in the spine.

Methods
The databases PubMed, MEDLINE (via OVID) and The Cochrane Central Register of Controlled Trials, were searched for studies that investigated the diagnostic use of 3D MRI to evaluate stenoses in various parts of the spine in humans. Three reviewers examined the literature and conducted systematic review according to PRISMA 2020 guidelines.

Results
Thirty studies were retrieved from 2 595 publications for this systematic review. The overall diagnostic performance of 3D MRI outperformed the conventional 2D MRI with reported sensitivities ranging from 79 to 100% and specificities ranging from 86 to 100% regarding the evaluation of central, recess and foraminal stenoses. In general, high level of agreement (both intra- and interrater) regarding visibility and pathology on 3D sequences was reported. Studies show that well-optimized 3D sequences allow the use of higher spatial resolution, similar scan time and increased SNR and CNR when compared to corresponding 2D sequences. However, the benefit of 3D sequences is in the additional information provided by them and in the possibility to save total protocol scan times.

Conclusion
The literature on the spine 3D MRI assessment of stenoses is heterogeneous with varying MRI protocols and diagnostic results. However, the 3D sequences offer similar or superior detection of stenoses with high reliability. Especially, the advantage of 3D MRI seems to be the better evaluation of recess stenoses.
Validation of cardiac image-derived input functions for functional PET quantification
Authors: Reed Murray Bruce , Handschuh Patricia Anna , Schmidt Clemens , Murgaš Matej , Gomola David , Milz Christian , Klug Sebastian , Eggerstorfer Benjamin , Aichinger Lisa , Godbersen Godber Mathis , Nics Lukas , Traub-Weidinger Tatjana , Hacker Marcus , Lanzenberger Rupert , Hahn Andreas 
Published: April 2024

Abstract
Purpose
Functional PET (fPET) is a novel technique for studying dynamic changes in brain metabolism and neurotransmitter signaling. Accurate quantification of fPET relies on measuring the arterial input function (AIF), traditionally achieved through invasive arterial blood sampling. While non-invasive image-derived input functions (IDIF) offer an alternative, they suffer from limited spatial resolution and field of view. To overcome these issues, we developed and validated a scan protocol for brain fPET utilizing cardiac IDIF, aiming to mitigate known IDIF limitations.

Methods
Twenty healthy individuals underwent fPET/MR scans using [18F]FDG or 6-[18F]FDOPA, utilizing bed motion shuttling to capture cardiac IDIF and brain task-induced changes. Arterial and venous blood sampling was used to validate IDIFs. Participants performed a monetary incentive delay task. IDIFs from various blood pools and composites estimated from a linear fit over all IDIF blood pools (3VOI) and further supplemented with venous blood samples (3VOIVB) were compared to the AIF. Quantitative task-specific images from both tracers were compared to assess the performance of each input function to the gold standard.

Results
For both radiotracer cohorts, moderate to high agreement (r: 0.60–0.89) between IDIFs and AIF for both radiotracer cohorts was observed, with further improvement (r: 0.87–0.93) for composite IDIFs (3VOI and 3VOIVB). Both methods showed equivalent quantitative values and high agreement (r: 0.975–0.998) with AIF-derived measurements.

Conclusion
Our proposed protocol enables accurate non-invasive estimation of the input function with full quantification of task-specific changes, addressing the limitations of IDIF for brain imaging by sampling larger blood pools over the thorax. These advancements increase applicability to any PET scanner and clinical research setting by reducing experimental complexity and increasing patient comfort.