bluuebunny/crossref_metadata_2025_split huggingface dataset:
New shear transfer system for concrete‐filled steel tube (CFST) columns
Authors: Soltanalipour Milad , Ferrer‐Ballester Miquel , Marimon Carvajal Frederic , Albareda Valls Albert , Casafont Ribera Miquel , Iglesias Toquero Gorka 
Published: May 2022

AbstractConcrete‐filled steel tube (CFST) columns are frequently used in construction due to their high ductility and improved loadbearing capacities. At beam‐to‐CFST column joints, gusset plates are welded to the outer face of the steel tube, and specific elements should ensure the shear transfer between the inner face of the steel tube and the concrete core. The current shear transfer systems are shear studs, internal rings, angles, steel plates, steel bars, tab stiffeners, etc. Although good, these systems also have disadvantages, such as slowing down the construction process, complexity of execution, greater material consumption and restricting the flow when pumping the concrete into the tube. UPCCFST is a new connection system that enhances the shear bond strength of CFST columns and consists of punching the steel tube inwards to produce crown‐shaped protrusions that act as shear connectors. This system also speeds up the construction process, simplifies connections, does not restrict the flow when casting the concrete and has economic and environmental advantages. Push‐out tests were performed to evaluate the shear bond strength. The shear strength improvement using UPCCFST has been compared with the reference conventional CFST columns. The new system increased the shear bond strength by up to 6.67 times for the SHS 200x4 specimens and 2.89 times for the SHS 110x2 specimens. This paper explains the UPCCFST system, the prototyping process, the testing and the most important results and observations.
Hybrid connection technologies for hollow sections in steel construction
Authors: Ummenhofer Thomas , Boretzki Jakob , Albiez Matthias 
Published: May 2022

AbstractCircular hollow sections (CHS) offer a variety of constructional and architectural advantages. Up to now, hollow section structures have usually been connected by welding, and more rarely by bolting. However, these established connection methods have disadvantages. Despite its great success in the mobility sector, adhesive bonding is not yet used for joining hollow steel sections in steel construction. Adhesive bonding, however, has significant advantages, especially if combined with classical joining processes. To highlight these advantages, this article presents excerpts from the results obtained in two recently completed research projects. First, a hybrid brace connection for hollow section framework structures is presented which combines welding, bolting and adhesive bonding methods. In addition, the loadbearing behaviour of a novel hybrid grouted connection, which advantageously combines adhesive and grout materials, is analysed and discussed in this paper.
Theorie und Methodik
Authors: Geursen Elisabeth 
Published: May 2022

ZusammenfassungIm zweiten Kapitel erfolgt eine theoretische Erklärung der für das Forschungsvorhaben relevanten Methodik und Termini. Darin werden diskurslinguistische Ansätze einschließlich der Darstellung der linguistischen Diskursanalyse nach Konerding und deren Abgrenzung zu anderen Formen der Diskursanalyse aufgeführt. Außerdem wird die Erweiterung des diskurslinguistischen und korpusbasierten Verfahrens durch eine linguistisch-operationalisierte Anwendung des Frame-Begriffs für die vorliegende Arbeit aufgezeigt. Dabei sind Konerdings Ausführungen zum Diskursthema zentral und werden für die Abbildung der thematischen Korpora berücksichtigt. Dem übergeordneten Diskursthema „Nachhaltigkeit im Personalmanagement“, verstanden als spezifikationsbedürftiger Konzeptframe einer nominalisierten Makroposition, wird ein allgemeiner sortal bestimmter Matrixframe – Zustand – zugeordnet (Konerding 1993, 2005, 2007). Der Matrixframe Zustand wird angewandt, da nachhaltiges Personalmanagement, ausgehend vom Ist-Zustand eines traditionellen Personalmanagements, durch die Umsetzung der Forderungen und Handlungen der am Diskurs beteiligten Akteure als spezifischer Zielzustand einer entsprechend gesteuerten Entwicklung erreicht werden soll. Auf dieser Grundlage werden Unternehmenstexte sowie diskurskonstituierende Medientexte recherchiert und analysiert.
Nachhaltigkeit im Personalmanagement
Authors: Geursen Elisabeth 
Published: May 2022

ZusammenfassungAusgehend von einer Charakterisierung des Nachhaltigkeitsbegriffs werden in Kapitel 3 Aspekte grundlegender Nachhaltigkeitsforschung umrissen und diese auf das Personalmanagement angewandt. Es wird ein Nachhaltigkeitsbegriff entwickelt, der als Referenzobjekt für das Forschungsvorhaben einer linguistischen Untersuchung dient. Außerdem wird der Nachhaltigkeitsbegriff im Personalmanagement unter geschichtstheoretischen und wirtschaftspolitischen Aspekten beleuchtet sowie die für die Untersuchung relevanten Konzepte vorgestellt. Vor dem Hintergrund der praktischen Umsetzung der Nachhaltigkeitsidee in Unternehmen und den damit zusammenhängenden Fragen nach der Vereinbarkeit von nachhaltigem Handeln und unternehmerischer Gewinnmaximierung erforscht die Arbeit das Thema des Diskursstrangs „Nachhaltigkeit im Personalmanagement“ auf mehreren Ebenen: in der Wissenschaft, in Unternehmen und in der Öffentlichkeit.
Confinement/deconfinement transition in the D0-brane matrix model — A signature of M-theory?
Authors:   Monte Carlo String/M-theory collaboration (MCSMC), Bergner Georg , Bodendorfer Norbert , Hanada Masanori , Pateloudis Stratos , Rinaldi Enrico , Schäfer Andreas , Vranas Pavlos , Watanabe Hiromasa 
Published: May 2022

Abstract
We study the confinement/deconfinement transition in the D0-brane matrix model (often called the BFSS matrix model) and its one-parameter deformation (the BMN matrix model) numerically by lattice Monte Carlo simulations. Our results confirm general expectations from the dual string/M-theory picture for strong coupling. In particular, we observe the confined phase in the BFSS matrix model, which is a nontrivial consequence of the M-theory picture. We suggest that these models provide us with an ideal framework to study the Schwarzschild black hole, M-theory, and furthermore, the parameter region of the phase transition between type IIA superstring theory and M-theory. A detailed study of M-theory via lattice Monte Carlo simulations of the D0-brane matrix model might be doable with much smaller computational resources than previously expected.
TBA-like equations for non-planar scattering amplitude/Wilson lines duality at strong coupling
Authors: Ouyang Hao , Shu Hongfei 
Published: May 2022

Abstract
We compute the minimal area of a string worldsheet ending on two infinite periodic light-like Wilson lines in the AdS3 boundary, which is dual to the first non-planar correction to the gluon scattering amplitude in $$ \mathcal{N} $$
N
= 4 SYM at the strong coupling. Using the connection between the Hitchin system and the thermodynamic Bethe ansatz (TBA) equations, we present an analytic method to compute the minimal area surface and express the non-trivial part of the minimal area in terms of the free energy of the TBA-like equations. Given the cross ratios as inputs, the area computed from the TBA-like equations matches that calculated using the numerical integration.
Divisor topologies of CICY 3-folds and their applications to phenomenology
Authors: Carta Federico , Mininno Alessandro , Shukla Pramod 
Published: May 2022

Abstract
In this article, we present a classification for the divisor topologies of the projective complete intersection Calabi-Yau (pCICY) 3-folds realized as hypersurfaces in the product of complex projective spaces. There are 7890 such pCICYs of which 7820 are favorable, and can be subsequently useful for phenomenological purposes. To our surprise we find that the whole pCICY database results in only 11 (so-called coordinate) divisors (D) of distinct topology and we classify those surfaces with their possible deformations inside the pCICY 3-fold, which turn out to be satisfying 1 ≤ h2,0(D) ≤ 7. We also present a classification of the so-called ample divisors for all the favorable pCICYs which can be useful for fixing all the (saxionic) Kähler moduli through a single non-perturbative term in the superpotential. We argue that this relatively unexplored pCICY dataset equipped with the necessary model building ingredients, can be used for a systematic search of physical vacua. To illustrate this for model building in the context of type IIB CY orientifold compactifications, we present moduli stabilization with some preliminary analysis of searching possible vacua in simple models, as a template to be adopted for analyzing models with a larger number of Kähler moduli.
Tensor renormalization group study of (3+1)-dimensional ℤ2 gauge-Higgs model at finite density
Authors: Akiyama Shinichiro , Kuramashi Yoshinobu 
Published: May 2022

Abstract
We investigate the critical endpoints of the (3+1)-dimensional ℤ2 gauge-Higgs model at finite density together with the (2+1)-dimensional one at zero density as a benchmark using the tensor renormalization group method. We focus on the phase transition between the Higgs phase and the confinement phase at finite chemical potential along the critical end line. In the (2+1)-dimensional model, the resulting endpoint is consistent with a recent numerical estimate by the Monte Carlo simulation. In the (3+1)-dimensional case, however, the location of the critical endpoint shows disagreement with the known estimates by the mean-field approximation and the Monte Carlo studies. This is the first application of the tensor renormalization group method to a four-dimensional lattice gauge theory and a key stepping stone toward the future investigation of the phase structure of the finite density QCD.
The time-dependent Hartree–Fock–Bogoliubov equations for Bosons
Authors: Bach Volker , Breteaux Sebastien , Chen Thomas , Fröhlich Jürg , Sigal Israel Michael 
Published: May 2022

AbstractWe introduce the map of dynamics of quantum Bose gases into dynamics of quasifree states, which we call the “nonlinear quasifree approximation”. We use this map to derive the time-dependent Hartree–Fock–Bogoliubov (HFB) equations describing the dynamics of quantum fluctuations around a Bose–Einstein condensate. We prove global well-posedness of the HFB equations for pair potentials satisfying suitable regularity conditions, and we establish important conservation laws. We show that the space of solutions of the HFB equations has a symplectic structure reminiscent of a Hamiltonian system. This is then used to relate the HFB equations to the HFB eigenvalue equations discussed in the physics literature. We also construct Gibbs equilibrium states at positive temperature associated with the HFB equations, and we establish criteria for the appearance of Bose–Einstein condensation.
The wastewater micropollutant carbamazepine in insectivorous birds—an exposure estimate
Authors: Wicht Anna-Jorina , Heye Katharina , Schmidt Anja , Oehlmann Jörg , Huhn Carolin 
Published: May 2022

AbstractInsects with aquatic life stages can transfer sediment and water pollutants to terrestrial ecosystems, which has been described for metals, polyaromatic hydrocarbons, and polychlorinated chemicals. However, knowledge of the transfer of aquatic micropollutants released by wastewater treatment plants is scarce despite some preliminary studies on their occurrence in riparian spiders. In our study, we address a major analytical gap focusing on the transfer of the micropollutant carbamazepine from the larvae to the adult midges of Chironomus riparius using an optimized QuEChERS extraction method and HPLC–MS/MS applicable to both life stages down to the level of about three individuals. We show that the uptake of carbamazepine by larvae is concentration-dependent and reduces the emergence rate. Importantly, the body burden remained constant in adult midges. Using this information, we estimated the daily exposure of insectivorous tree swallows as terrestrial predators to carbamazepine using the energy demand of the predator and the energy content of the prey. Assuming environmentally relevant water concentrations of about 1 μg/L, the daily dose per kilogram of body weight for tree swallows was estimated to be 0.5 μg/kg/day. At places of high water contamination of 10 μg/L, the exposure may reach 5 μg/kg/day for this micropollutant of medium polarity. Considering body burden changes upon metamorphosis, this study fills the missing link between aquatic contamination and exposure in terrestrial habitats showing that wastewater pollutants can impact birds’ life. Clearly, further analytical methods for biota analysis in both habitats are urgently required to improve risk assessment.
Graphical abstract
Differentiation of juice of mandarin-like hybrids based on physicochemical characteristics, bioactive compounds, and antioxidant capacity
Authors: Anticona Mayra , Fayos Maria-Carmen , Esteve Maria-Jose , Frigola Ana , Blesa Jesus , Lopez-Malo Daniel 
Published: May 2022

AbstractIn this study, samples of mandarin-like hybrids (Clemenvilla, Nadorcott and Ortanique) from two harvesting seasons (2017−2018 and 2018−2019) were analyzed, to evaluate its differences in physicochemical characteristics and nutritional properties and establish the parameters that allow classify these citrus cultivars. Results showed that Clemenvilla juice had the highest concentration of total phenolic and ascorbic acid and are strongly correlated to its higher antioxidant capacity. Flavonoids were higher in Nadorcott samples. Large differences of total carotenoids were observed in juice analyzed. Varieties and harvesting seasons significantly influenced (p < 0.05) the physicochemical properties, bioactive compounds content and antioxidant capacity of samples. The pH, flavonoids, ascorbic acid, DPPH and TEAC values were determined as predictor parameters to classify the groups according to the varieties, concluding that Nadorcott samples were clearly different. The data presented in this research will currently provide information about the physicochemical evaluation of mandarin-like hybrid varieties and their potential as source of bioactive compounds and antioxidant capacity.
Primary fibular grafting combined with double plating in distal femur fractures in elderly patients
Authors: Ibrahim Fady M. , Ghazawy Ahmed K. El , Hussien Mohammed A. 
Published: May 2022

Abstract

Purpose
To report functional and radiological outcomes of using primary fibular graft together with double plating in distal femoral fractures in the elderly.

Methods
A retrospective study on 30 elderly patients with comminuted distal femoral fractures managed by primary fibular grafting and double plating through an anterior midline approach has been conducted. Only isolated distal femoral fractures type 33-A3, 33-C2, and 33-C3 were included. The patient’s mean age was 75.3 years. Evaluation included operative time, blood loss, time to union, knee range of motion, Sanders scoring, and presence of complications.

Results
The average follow-up period was 26.6 months. Mean intraoperative blood loss was 401 ml, and mean operative time was 216 min. All patients had a knee range of motion (90–120°) during follow-up. Time for union ranged from 16 to 23 weeks with a mean of 18.4 weeks, with no cases of non-union. A total of 22 patients (73.3%) showed excellent functional outcomes, and the remaining eight (26.7%) showed good functional outcomes according to the Sanders scoring system. Only two cases (6.6%) had superficial wound infections managed conservatively. No post-operative deformity, loss of reduction, or implant failure was observed until the end of follow-up period.

Conclusion
Primary fibular grafting combined with double plating of comminuted distal femur fractures in patients above 70 years is an effective technique with higher rates of union and lower re-operation rates compared to other fixation modalities.
Identifiability analysis for models of the translation kinetics after mRNA transfection
Authors: Pieschner Susanne , Hasenauer Jan , Fuchs Christiane 
Published: May 2022

AbstractMechanistic models are a powerful tool to gain insights into biological processes. The parameters of such models, e.g. kinetic rate constants, usually cannot be measured directly but need to be inferred from experimental data. In this article, we study dynamical models of the translation kinetics after mRNA transfection and analyze their parameter identifiability. That is, whether parameters can be uniquely determined from perfect or realistic data in theory and practice. Previous studies have considered ordinary differential equation (ODE) models of the process, and here we formulate a stochastic differential equation (SDE) model. For both model types, we consider structural identifiability based on the model equations and practical identifiability based on simulated as well as experimental data and find that the SDE model provides better parameter identifiability than the ODE model. Moreover, our analysis shows that even for those parameters of the ODE model that are considered to be identifiable, the obtained estimates are sometimes unreliable. Overall, our study clearly demonstrates the relevance of considering different modeling approaches and that stochastic models can provide more reliable and informative results.
Effektive Kommunikation in Scrum und der agilen Softwareentwicklung
Authors: Ellmann Mathias 
Published: May 2022

ZusammenfassungIn Scrum und der agilen Softwareentwicklung muss effektiv verbal als auch nonverbal kommuniziert werden, um in ein‑ bis vierwöchigen Arbeitszyklen Sprints Software mit wenig Konflikten zu entwickeln. Bei ineffektiver Kommunikation können Ressourcen wie Energie, Zeit und Beziehungen sowie Schlaf als Konsequenz riskiert werden, was den Sprint-Erfolg gefährdet und eine agile Softwareentwicklung erschwert. Wir gehen auf Kommunikationsschwierigkeiten ein, die durch Frustration und mangelnde Befriedigung von Wünschen, User Stories und Anforderungen des:der Scrum Masters:in, Product Owners:in, Developers:innen und Stakeholders:innen in der agilen Softwareentwicklung entstehen können. In diesem Artikel behandeln wir effektive Formen der verbalen und nonverbalen Kommunikation, welche zu mehr Erfolg mit Scrum und in der agilen Softwareentwicklung führen können.
Need, equity, and accountability
Authors: Bauer Alexander Max , Meyer Frauke , Romann Jan , Siebel Mark , Traub Stefan 
Published: May 2022

AbstractWe report the results of a vignette study with an online sample of the German adult population in which we analyze the interplay between need, equity, and accountability in third-party distribution decisions. We asked participants to divide firewood between two hypothetical persons who either differ in their need for heat or in their productivity in terms of their ability to chop wood. The study systematically varies the persons’ accountability for their neediness as well as for their productivity. We find that participants distribute significantly fewer logs of wood to persons who are held accountable for their disadvantage. Independently of being held accountable or not, the needier person is partially compensated with a share of logs that exceeds her contribution, while the person who contributes less is given a share of logs smaller than her need share. Moreover, there is a domain effect in terms of participants being more sensitive to lower contributions than to greater need.
Clinical and humanistic burden among pediatric patients with neurofibromatosis type 1 and plexiform neurofibroma in the USA
Authors: Yang Xiaoqin , Yoo Hyun Kyoo , Amin Suvina , Cheng Wendy Y. , Sundaresan Sanjana , Zhang Lujia , Duh Mei Sheng 
Published: May 2022

Abstract
Purpose
To assess clinical and humanistic burden among pediatric patients with neurofibromatosis type 1 (NF1) and plexiform neurofibroma (PN) in the USA.

Methods
NF1-PN patients aged 8–18 years (treatment-naïve or ≤ 1 month of selumetinib treatment) and their caregivers and caregivers of similar patients aged 2–7 years were recruited through the Children’s Tumor Foundation to participate in an online cross-sectional survey (December 2020–January 2021). Caregivers provided data on patients’ demographic and clinical characteristics and burden of debulking surgeries. Patients and caregivers provided self-reported or proxy responses to health-related quality of life (HRQoL) questions using validated instruments.

Results
Sixty-one patients and 82 caregivers responded to the survey. Median (range) age of patients was 11.5 (3–18) years, and 53.7% were female. Most were treatment-naïve (97.6%), with NF1-PN diagnosis for > 5 years (68.3%). Most patients (59.8%) had > 1 PN and 11.0% reporting > 5 PNs. Common NF1-PN symptoms included pain (64.6%), disfigurement (32.9%), and motor dysfunction (28.0%). Patients and caregiver proxies reported low overall HRQoL and reduced physical, emotional, social, and school functioning. Patients also reported considerable pain severity, interference, daily activity impairments, and movement difficulty. Few patients had received complete resections of their tumors (12.2%). 39.0% reported ≥ 1 debulking surgery, among whom, 15.6% had complications, and debulking surgery-related hospitalizations were common (53.1%).

Conclusions
The clinical and humanistic burden among pediatric NF1-PN patients is substantial. While debulking surgeries are used for symptom management, they are associated with considerable clinical sequelae. Results highlight a need for improved disease management strategies.
Innate immune cells in the pathophysiology of calcific aortic valve disease: lessons to be learned from atherosclerotic cardiovascular disease?
Authors: Broeders Wieteke , Bekkering Siroon , El Messaoudi Saloua , Joosten Leo A. B. , van Royen Niels , Riksen Niels P. 
Published: May 2022

AbstractCalcific aortic valve disease (CAVD) is the most common valvular disease in the developed world with currently no effective pharmacological treatment available. CAVD results from a complex, multifactorial process, in which valvular inflammation and fibro-calcific remodelling lead to valve thickening and cardiac outflow obstruction. The exact underlying pathophysiology of CAVD is still not fully understood, yet the development of CAVD shows many similarities with the pathophysiology of atherosclerotic cardiovascular disease (ASCVD), such as coronary artery disease. Innate immune cells play a crucial role in ASCVD and might also play a pivotal role in the development of CAVD. This review summarizes the current knowledge on the role of innate immune cells, both in the circulation and in the aortic valve, in the development of CAVD and the similarities and differences with ASCVD. Trained immunity and clonal haematopoiesis of indeterminate potential are proposed as novel immunological mechanisms that possibly contribute to the pathophysiology of CAVD and new possible treatment targets are discussed.