bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vibrationsinstallierte Monopfahlgründungen von Offshore‐Windenergieanlagen
Authors: Lüddecke Falk , Zipfel Bernadette , Schwedler Michael , Al Otaibi Walid 
Published: June 2021

AbstractMit einem Marktanteil von 81,2 % stellen Monopfahlgründungen von Offshore‐Windenergieanlagen nach wie vor die verbreitetste Gründungskonstruktion für Offshore‐Windenergieanlagen dar. Aktuell ist ein Trend zur Vibrationsrammung zu verzeichnen. Die Vibrationsrammung hat das Potenzial, die Installationszeit sowie den Eintrag von Rammschall stark zu reduzieren. Im Rahmen dieses Fachbeitrags werden für das neuartige Installieren von Monopfahlgründungen mittels Vibratorhammer in Bezug auf die zu erwartenden Beanspruchungen die wesentlichen bestimmenden Parameter benannt. Die Auswirkungen bei Variation dieser bestimmenden Parameter, wie die axiale Steifigkeit aus der Baugrund‐Bauwerksinteraktion, werden in genereller Form sowie im Hinblick auf den Arbeits‐ bzw. Frequenzbereich des Vibratorhammers vorgestellt. Die stahlbaulichen Nachweise und die zu erwartenden Beanspruchungshöhen im Vergleich zur Schlagrammung wie auch die zu erwartenden Ausnutzungsgrade für die Ermüdungsschädigung während der Vibrationsrammung werden untersucht.
Bond durability of basalt‐fiber‐reinforced‐polymer bars embedded in lightweight aggregate concrete subjected to freeze–thaw cycles
Authors: Deng Peng , Wang Yuejiao , Sun Yan , Liu Yan , Guo Wenhao 
Published: June 2021

AbstractIn recent years, basalt‐fiber‐reinforced‐polymer (BFRP) bars have become popular to replace steels. However, little is known about the performance of BFRP bars inserted in lightweight aggregate concrete (LWAC), especially the bonding performance under freeze–thaw (FT) cycles. In this study, a bond strength test was conducted for BFRP bars embedded in LWAC after FT cycles. BFRP bars, epoxy‐coated bars, and steels were tested for comparison purposes. The test parameters are the bar type, compressive strength of the LWAC, and FT cycles; 108 specimens were subjected to 0, 15, 30, and 50 FT cycles. Moreover, the bond strength models of the three types of bars were fitted to LWAC. The test results prove that the number of FT cycles significantly affects the bonding performance of the bar embedded in LWAC. The results also show that the bond strength prediction of the fitting model considering the FT cycle effect is consistent with the experimental results.
Parenterale Ernährung in deutschen Perinatalzentren
Authors: Hoffmann Julia , Haiden Nadja , Babl Jürgen , Fusch Christoph , Piening Brar , Schubert Sebastian , Mader Silke ,   Arbeitsgruppe parenterale Ernährung von EFCNI, GNPI und ADKA, Babl Jürgen , Erdmann Harald , Fusch Christoph , Haiden Nadja , Hentschel Roland , Herting Egbert , Hock Simone M. , Hoffmann Julia , Kostenzer Johanna , Mader Silke , Mihatsch Walter , Pfeil Johanna M. , Piening Brar , Schubert Sebastian , Seeliger Stephan , Zimmermann Luc J. I. 
Published: June 2021

Zusammenfassung
Hintergrund
Die Leitlinien der „European Society for Paediatric Gastroenterology, Hepatology and Nutrition“ (ESPGHAN) liefern evidenzbasierte Empfehlungen zu parenteraler Ernährung (PE) von Frühgeborenen und kranken Neugeborenen. Im Jahr 2013 wurde gezeigt, dass sie in Westeuropa nur teilweise angewendet werden und ihre klinische Implementierung verbessert werden sollte.

Ziel der Arbeit
Ziel dieser Arbeit ist, die derzeitige Anwendung der ESPGHAN-Leitlinien in Deutschland sowie Barrieren, die die Umsetzung verhindern, abzubilden.

Material und Methoden
Zusammen mit einer Expertengruppe und Institutionen aus dem deutschsprachigen Raum hat die „European Foundation for the Care of Newborn Infants“ (EFCNI) eine Befragung durchgeführt. Mit einem Online-Fragebogen wurden Pädiaterinnen/Pädiater (PÄD) und Krankenhausapothekerinnen/Krankenhausapotheker (KHA) aus deutschen Perinatalzentren und Krankenhausapotheken bezüglich der Umsetzung der Leitlinien befragt. Die Ergebnisse wurden qualitativ und quantitativ ausgewertet.

Ergebnisse und Diskussion
Von 558 angeschriebenen Kontakten wurden 196 gültige Umfragen ausgewertet. Nach Eigenangaben wenden 77 % der PÄD und 48 % der KHA die ESPGHAN-Leitlinien an. Barrieren wurden innerhalb der klinischen Anwendung identifiziert und waren teilweise struktureller und/oder organisatorischer Natur. Verbesserungsbedarf wurde in der Bereitstellung von parenteralen Standardlösungen, insbesondere am Wochenende, und elektronischen Verordnungssystemen, der Verabreichung von Lipiden bereits am 1. Lebenstag und der regelmäßigen Beurteilung aller Laborparameter beobachtet.
Herausforderungen in der psychosozialen Versorgung am Beispiel der psychotherapeutischen Universitätsambulanz der Sigmund Freud PrivatUniversität – Eine Klientelanalyse
Authors: Reisinger Manfred , Knasmüller Florian , Aden Jan , Sindelar Brigitte 
Published: June 2021

ZusammenfassungDas Versorgungsmodell der Universitätsambulanz der SFU folgt der Zielsetzung, einen niederschwelligen Zugang zur Psychotherapie zu eröffnen, indem niedrige Tarife und kurze Wartezeiten für die Patient*innen die Regel darstellen. Um die Klientelstruktur der Ambulanz systematisch beschreiben zu können, wurden über einen Erhebungszeitraum von 2015–2018 Patient*innenmerkmale einer Untersuchungsstichprobe vonn = 629 Patient*innen erhoben. Auf Basis soziodemographischer und krankengeschichtlicher Informationen sowie der aktuellen Lebensqualität (WHOQOL) wurde eine Clusteranalyse nach der WARD-Methode durchgeführt: Es konnten vier inhaltlich plausible, empirisch trennscharfe Klient*innen-Cluster eruiert werden, die sich hinsichtlich der Dimensionen Bildungsabschluss, Hauptdiagnose, Erwerbstätigkeit und Migrationshintergrund signifikant unterscheiden. Die Cluster definieren sich hinsichtlich der Diagnosen in drei Cluster mit den Hauptdiagnosen F3 (Affektive Störungen), F4 (Neurotische, Belastungs- und somatoforme Störungen), F6 (Persönlichkeitsstörungen) und einen Cluster mit Patient*innen mit der Diagnose F3 oder F4. Dieser (n = 178) hebt sich als einer von Indikatoren hoher Vulnerabilität geprägter von den anderen drei Clustern ab. Die Patient*innen dieses Clusters sind mittleren Alters, überwiegend erwerbslos, weisen ein niedriges Bildungsniveau auf und leben mit betreuungspflichtigen Kindern in einem Haushalt und berichten eine niedrige Lebensqualität.Bemerkenswert ist die Altersstruktur in dieser Stichprobe mit über 72 % von Patient*innen in der Lebensphase der Emerging Adulthood in den anderen drei Clustern. Diskutiert werden die Implikationen der Ergebnisse für die psychotherapeutischen Ausbildungscurricula sowie für die Relevanz von Universitätsambulanzen für die psychotherapeutische Versorgung einer Klientel, die in dieser Lebenssituation wohl keine Möglichkeit zur Inanspruchnahme einer großteils selbstfinanzierten Psychotherapie fände.
Multidisciplinary site investigations: refraction microtremor surveys
Authors: Pancha A. , Apperley R. A. 
Published: June 2021

AbstractWe present three case studies from recent site investigations that have utilised geophysical data to supplement traditional geotechnical investigations. The refraction microtremor (ReMi) method, which measures the shear-wave velocity of the subsurface soil profile, is used to enhance our overall understanding of geotechnical site conditions. Interpolation of the closely spaced one-dimensional velocity-depth profiles along linear arrays allows two- or three-dimensional velocity-versus-depth representations to be produced, thereby mapping lateral variations and extending subsurface characterisations between more expensive spot borehole measurements. The ReMi technique provides a non-invasive and cost-effective way of estimating vertical soil/rock shear-wave versus depth profiles and therefore is an effective reconnaissance tool for targeting key areas for further, more expensive intrusive investigation method. This paper examines the contribution ReMi shear-wave velocity assessments can make towards enhancing subsurface geological and geotechnical models to mitigate risk from unforeseen ground conditions. Case studies demonstrate the benefits of incorporating the shear-wave velocity estimates from ReMi into the geotechnical investigations. These include identifying the thickness of basalt flows, identifying the location of buried stream channels, characterising palaeo-topographical features, identifying areas of low velocity which may be prone to liquefaction, and assessing the thickness and velocity variations within geological units between borehole and test pit locations. The objective is not to replace traditional geotechnical investigations but allow more meaningful ground models to be developed.
Does economic policy uncertainty matter to explain connectedness within the international sovereign bond yields?
Authors: Benlagha Noureddine , Hemrit Wael 
Published: June 2021

AbstractThis paper examines the determinants of the dynamic connectedness between sovereign bond yields in a sample of G7 countries. In addition to the common macroeconomic factors, we focus on the impact of Economic Policy Uncertainty (EPU) on the dynamic connectedness patterns between bond yields. To this end, we first examine the full-sample connectedness among the seven bond yields and examine various features of connectedness using a measure recently proposed by Diebold and Yilmaz (Int J Forecast 28(1):57-66, 2012). To examine the determinants of the dynamic connectedness, we use the panel data model to consider the dynamic net connectedness between the considered bond yields as the endogenous variable. Overall, being the transmitter or recipient of spillovers appears to have independent and different influences depending on each of the two types of sovereign bond yields. Also, the findings support the idea that EPU can create an environment likely to exacerbate the transmission of spillover shocks between two-year sovereign bond yields. Conversely, on the whole, EPU does not appear to affect the connectedness of thirty-year sovereign bond yields in various bond markets. The findings also reveal the significant impacts of real output on how shocks across countries manifest in different ways.
Reservoir characteristics and control mechanism of resistivity low-contrast oil pays in Chang 8 tight sandstone of Longdong West area, Ordos Basin
Authors: Bai Ze , Tan Maojin , Shi Yujiang , Li Gaoren , Clark Simon Martin 
Published: June 2021

AbstractLog interpretation and evaluation of tight sandstone reservoir in Chang 8 Member of Longdong West area, Ordos Basin, China, are facing great challenges due to the co-development of normal oil pay and resistivity low-contrast oil pay. To better guide the exploration and development of oil resources in this area, the reservoir characteristics and control mechanism of resistivity low-contrast oil pay were studied. Firstly, the reservoirs were divided into resistivity low-contrast oil pay (RLP) and normal oil pay (NP) based on the relative value of the apparent resistivity increase rate. Then, the difference of reservoir characteristics between RLP and NP is analyzed by comparing a series of experimental data and real logging data in those two reservoir types. Finally, the control mechanism of RLP was studied from reservoir micro-factors and regional macro-factors, respectively. It is found that the chlorite and illite are the most abundant clay minerals in RLP and NP, respectively. Compared with NP reservoir, the average porosity of RLP is better, but the pore space is mainly composed of micropores, which lead to smaller average pore throat radius and poor pore structure. The high irreducible water saturation and high formation water salinity reduced the reservoir resistivity from micro-aspect. Besides, the difference of hydrocarbon expulsion capacity of source rock and the regional difference of formation water salinity controlled the distribution of RLP and NP. Comprehensive consideration of the reservoir micro-factors and regional macro-factors is important to carry out effective logging interpretation and evaluation.
Study on oil displacement efficiency of offshore sandstone reservoir with big bottom water
Authors: Tan Jie , Liu Ying-xian , Li Yan-lai , Liu Chun-yan , Mou Song-ru 
Published: June 2021

AbstractX oilfield is a typical sandstone reservoir with big bottom water in the Bohai Sea. The viscosity of crude oil ranges from 30 to 425 cp. Single sand development with the horizontal well is adopted. At present, the water content is as high as 96%. The water cut of the production well is stable for a long time in the high water cut period. The recoverable reserves calculated by conventional methods have gradually increased, and even the partial recovery has exceeded the predicted recovery rate. This study carried out an oil displacement efficiency experiment under big water drive multiple to accurately understand an extensive bottom water reservoir's production law in an ultra-high water cut stage. It comprehensively used the scanning electron microscope date, casting thin section, oil displacement experiment, and production performance to analyze the change law of physical properties and relative permeability curve from the aspects of reservoir clay minerals, median particle size, pore distribution, and pore throat characteristics. Therefore, the development law of horizontal production wells in sandstone reservoirs with big bottom water is understood. It evaluates the ultimate recovery of sandstone reservoirs with big bottom water. It provides a fundamental theoretical basis and guidance for dynamic prediction and delicate potential tapping of sandstone reservoirs with big bottom water at a high water cut stage.
Kompetenzmodell der Modellierkompetenz – Die Rolle abduktiven Schließens beim Modellieren
Authors: Krüger Dirk , Upmeier zu Belzen Annette 
Published: June 2021

ZusammenfassungIn diesem theoretischen Beitrag wird das Kompetenzmodell der Modellkompetenz durch Integration der Theorie des abduktiven Schließens ausdifferenziert und als Kompetenzmodell der Modellierkompetenz präsentiert. Abduktives Schließen in der Biologie heißt, ein biologisches Phänomen durch einen kausalen Rückschluss theoriebasiert oder kreativ bestmöglich zu erklären. Kreativität innoviert im Sinne der Erkenntnisgewinnung durch neues theoretisches Wissen den Prozess des Modellierens. Im ausdifferenzierten Kompetenzmodell wird abduktiv schließendes Erklären als neues Niveau hinzugefügt. Beim abduktiv schließenden Erklären bildet die Herstellung eines Modells die Basis für einen sich möglicherweise anschließenden deduktiven Überprüfungsprozess. Dieser umfasst bei der Anwendung des Modells das Ableiten von Hypothesen aus dem Modell und deren Testung. Bei dieser Anwendung eines Modells als Forschungswerkzeug stehen, im Gegensatz zur Anwendung als verständniserzeugendes Medium, prozedurale sowie epistemische Aspekte des Modellierens im Vordergrund. Fachdidaktische Arbeiten aus verschiedenen Disziplinen weisen auf die Bedeutung des abduktiven Schließens beim Modellieren hin. Ausgehend davon stellt sich die Frage, ob und wie abduktives Schließen beim Modellieren auf der Basis von theoretischem Fachwissen oder kreativer Innovation die Bedeutung eines Modells als Forschungswerkzeug hervorhebt.Die Berücksichtigung des abduktiven Schließens beim Modellieren stößt Vorhaben in drei Forschungsbereichen an: (1) Bezogen auf Grundlagenforschung gilt es zu klären, inwieweit die erfolgreiche Modellierung eines Phänomens von theoretischen Vorkenntnissen abhängt. (2) Bezogen auf die Erfassung von Modellierkompetenz ist zu prüfen, inwieweit unterschiedliche biologische Kontexte abduktives Schließen anregen. (3) Mit Blick auf eine Förderung von Modellierkompetenz ist zu untersuchen, inwieweit beim Modellieren biologisches Fachwissen für abduktives Schließen bei der Herstellung eines Modells dabei hilft, in eine deduktive Modellanwendung überzuleiten.
Secondary cup and cap products in coarse geometry
Authors: Wulff Christopher 
Published: June 2021

AbstractWe construct secondary cup and cap products on coarse (co-)homology theories from given cross and slant products. They are defined for coarse spaces relative to weak generalized controlled deformation retracts. On ordinary coarse cohomology, our secondary cup product agrees with a secondary product defined by Roe. For coarsifications of topological coarse (co-)homology theories, our secondary cup and cap products correspond to the primary cup and cap products on Higson dominated coronas via transgression maps. And in the case of coarse$$\mathrm {K}$$K-theory and -homology, the secondary products correspond to canonical primary products between the$$\mathrm {K}$$K-theories of the stable Higson corona and the Roe algebra under assembly and co-assembly.
A multi-model assisted differential evolution algorithm for computationally expensive optimization problems
Authors: Yu Haibo , Kang Li , Tan Ying , Zeng Jianchao , Sun Chaoli 
Published: June 2021

AbstractSurrogate models are commonly used to reduce the number of required expensive fitness evaluations in optimizing computationally expensive problems. Although many competitive surrogate-assisted evolutionary algorithms have been proposed, it remains a challenging issue to develop an effective model management strategy to address problems with different landscape features under a limited computational budget. This paper adopts a coarse-to-fine evaluation scheme basing on two surrogate models, i.e., a coarse Gaussian process and a fine radial basis function, for assisting a differential evolution algorithm to solve computationally expensive optimization problems. The coarse Gaussian process model is meant to capture the general contour of the fitness landscape to estimate the fitness and its degree of uncertainty. A surrogate-assisted environmental selection strategy is then developed according to the non-dominance relationship between approximated fitness and estimated uncertainty. Meanwhile, the fine radial basis function model aims to learn the details of the local fitness landscape to refine the approximation quality of the new parent population and find the local optima for real-evaluations. The performance and scalability of the proposed method are extensively evaluated on two sets of widely used benchmark problems. Experimental results show that the proposed method can outperform several state-of-the-art algorithms within a limited computational budget.
Playing When Paying and What Happens Next: Customer Satisfaction and Word-of-Mouth Intention in Gambled Price Promotions
Authors: Akbari Karl , Wagner Udo 
Published: June 2021

AbstractGambled price promotions, i.e., discounts in which the customers’ savings depend on the outcome of a game, have recently gained increasing attention from research and practice. This type of promotion is often framed as an in-store event, and consumers experience two properties inherent in gambling: entertainment and varied financial payoffs. Depending on the consumers’ assessments of these two elements, these experiences might drive two postpurchase consequences of such campaigns: customer satisfaction with the retailer and word-of-mouth intention. To assess these effects, two field quasi-experiments with gambled price promotions were conducted: one in a candy store and the other in a retail furniture store. Two main findings emerge from these studies: (1) The customers in both studies endorse gambled price promotions and are more willing to engage in word-of-mouth when participating in such a campaign. The effect of gambled price promotions on customer satisfaction is positive in the low-stakes setting of the candy store but insignificant in the furniture store. (2) The positive effects of such promotions are mediated by their entertainment value and moderated by the consumers’ assessments of the discount. The implication of these results is that, in addition to the already known revenue-increasing prepurchase effects, gambled price promotions can also result in positive postpurchase effects and should represent a valuable addition to the seller’s promotion toolbox.
Geochemical and isotopic evidence of groundwater salinization processes in the Essaouira region, north-west coast, Morocco
Authors: EL Mountassir Otman , Bahir Mohammed , Ouazar Driss , Chehbouni Abdelghani , Carreira Paula M. 
Published: June 2021

AbstractThe city of Essaouira is located along the north-west coast of Morocco, where groundwater is the main source of drinking, domestic and agricultural water. In recent decades, the salinity of groundwater has increased, which is why geochemical techniques and environmental isotopes have been used to determine the main sources of groundwater recharge and salinization. The hydrochemical study shows that for the years 1995, 2007, 2016 and 2019, the chemical composition of groundwater in the study area consists of HCO3–Ca–Mg, Cl–Ca–Mg, SO4–Ca and Cl–Na chemical facies. The results show that from 1995 to 2019, electrical conductivity increased and that could be explained by a decrease in annual rainfall in relation to climate change and water–rock interaction processes. Geochemical and environmental isotope data show that the main geochemical mechanisms controlling the hydrochemical evolution of groundwater in the Cenomanian–Turonian aquifer are the water–rock interaction and the cation exchange process. The diagram of δ2H = 8 * δ18O + 10 shows that the isotopic contents are close or above to the Global Meteoric Water Line, which suggests that the aquifer is recharged by precipitation of Atlantic origin. In conclusion, groundwater withdrawal should be well controlled to prevent groundwater salinization and further intrusion of seawater due to the lack of annual groundwater recharge in the Essaouira region.
Bad rules rather than slow discretion? A critical appraisal of EU stabilisation policy
Authors: Lucke Bernd , Neumann Bodo R. 
Published: June 2021

AbstractThe EU reacted swiftly to the economic dimension of Covid-19 by designing new instruments to support the fiscal policy of Member States. But entry into force and implementation was slow due to various political hurdles with little action taking effect by the end of 2020. In a draft law currently under consideration in the European Parliament, the Commission proposes speedier crisis responses using a rules-based approach. We analyse the legal and economic aspects of this so-called “European Investment Stabilisation Function” (EISF) and argue that a rules-based policy may be inefficient and detrimental to important EU policy objectives. For instance, in the Covid-19 crisis, most of the EISF funds would have supported only the wealthiest Member States. In general, we show that well-intended EU-funded stabilisation measures may actually be counterproductive in terms of EU cohesion, suboptimal in terms of stabilisation and regressive in terms of cross-country income distribution.
BOUNDED-ANALYTIC SEQUENT CALCULI AND EMBEDDINGS FOR HYPERSEQUENT LOGICS
Authors: CIABATTONI AGATA , LANG TIMO , RAMANAYAKE REVANTHA 
Published: June 2021

AbstractA sequent calculus with the subformula property has long been recognised as a highly favourable starting point for the proof theoretic investigation of a logic. However, most logics of interest cannot be presented using a sequent calculus with the subformula property. In response, many formalisms more intricate than the sequent calculus have been formulated. In this work we identify an alternative: retain the sequent calculus but generalise the subformula property to permit specific axiom substitutions and their subformulas. Our investigation leads to a classification of generalised subformula properties and is applied to infinitely many substructural, intermediate, and modal logics (specifically: those with a cut-free hypersequent calculus). We also develop a complementary perspective on the generalised subformula properties in terms of logical embeddings. This yields new complexity upper bounds for contractive-mingle substructural logics and situates isolated results on the so-called simple substitution property within a general theory.