bluuebunny/crossref_metadata_2025_split huggingface dataset:
Compact super-wideband MIMO antenna with improved isolation for wireless communications
Authors: Singh Ajit Kumar , Mahto Santosh Kumar , Sinha Rashmi 
Published: August 2021

Abstract
This paper presents a miniaturized dual-element Super-Wideband (SWB) Multiple-Input-Multiple-Output (MIMO) antenna. The operation bandwidth is enhanced by 175% with a Bandwidth Dimension Ratio (BDR) of 6960, using a tapered microstrip line and employing an improved isolation technique. An inverted T-slot is used in the partial ground plane of the antenna. Isolation is increased up to 25 dB over the operating band (1.6–24.5 GHz) by using a pair of T-shaped stubs and a rectangular strip between them. A detailed analysis of the parameters Envelope Correlation Coefficient (ECC), Diversity Gain (DG), Mean Effective Gain (MEG), Total Active Reflection Coefficient (TARC), isolation between the ports, and Channel Capacity Loss (CCL) is undertaken to investigate the performance of proposed SWB MIMO antenna. A prototype of the proposed design is developed by fabricating on the FR–4 (loss tangent 0.02) dielectric substrate of electrical dimension 0.18λ
0 × 0.14λ
0. The measured parameters are in good agreement with the simulated ones. The proposed antenna focusses on 2.4–2.483 GHz frequency band (Bluetooth) and 3.4–3.6 GHz frequency band with a center frequency of 3.5 GHz (as part of the sub 6 GHz 5G band).
Monitoring imbibition dynamics at tissue level in Norway spruce using X-ray imaging
Authors: Martin Benoît , Colin Julien , Lu Pin , Mounkaila Mahamadou , Casalinho Joel , Perré Patrick , Rémond Romain 
Published: August 2021

Abstract
The study of moisture migration in Norway Spruce may reduce the discrepancy between measurements and simulations of transfers in buildings and thus be helpful for improving their performance and durability. For this purpose, X-ray imaging was used to study moisture migration in Norway spruce during imbibition at tissue level. Moisture content kinetics in earlywood and latewood, based on X-ray attenuation, was observed and measured through rigorous protocol. The imbibition process was studied in both longitudinal and radial directions. The results showed an easier migration of liquid in latewood than in earlywood in the longitudinal uptake. In the radial direction, the impact of compression wood as a barrier and the role of the anatomical structure in the liquid migration were highlighted by the direct visualization of filled tracheids.
COVID-19 and lung pathologies
Authors: Purohit Darshana , Ahirwar Ashok Kumar , Sakarde Apurva , Asia Priyanka , Gopal Niranjan 
Published: August 2021

Abstract
COVID-19 is a global emergency with over 10 million cases and over 500, 000 deaths worldwide. The SARS CoV-2 is a RNA virus belonging to the family coronaviridae. It has high infectivity. The manifestations of the disease range from asymptomatic or mild symptoms to severe pneumonia and ARDS. The CT scan of lung shows consolidation and “Ground Glass Opacities”. The persons with other comorbidities are considered to be at a higher rate of acquiring the infection. Asthma and other allergies have not been identified as major risk factors for COVID-19 as the number of asthmatic patients having COVID-19 is not high enough for it to be considered so. The occurrence of COVID-19 in COPD patients can be related with smoking. The ACE-2 expression in such patients was considerably high. The relation between COVID-19 and Tuberculosis can also be reflected in terms of the stigma associated with diagnosis and treatment of such diseases in some communities, eventually increasing the chances of people's reluctance to seek medical help. Cancer patients are usually more susceptible to infections. Lung cancer is no different. Additionally, lung cancer also has strong association with smoking further increasing the risk. The risk of getting infection and its severity is high for autoimmune disorders as well as fungal infections. Currently there is no definite treatment of COVID-19. However, some of the currently used modalities are hydroxychloroquine and antiviral drugs.
Characterization of the scavenger cell proteome in mouse and rat liver
Authors: Paluschinski Martha , Jin Cheng Jun , Qvartskhava Natalia , Görg Boris , Wammers Marianne , Lang Judith , Lang Karl , Poschmann Gereon , Stühler Kai , Häussinger Dieter 
Published: August 2021

Abstract
The structural-functional organization of ammonia and glutamine metabolism in the liver acinus involves highly specialized hepatocyte subpopulations like glutamine synthetase (GS) expressing perivenous hepatocytes (scavenger cells). However, this cell population has not yet been characterized extensively regarding expression of other genes and potential subpopulations. This was investigated in the present study by proteome profiling of periportal GS-negative and perivenous GS-expressing hepatocytes from mouse and rat. Apart from established markers of GS+ hepatocytes such as glutamate/aspartate transporter II (GLT1) or ammonium transporter Rh type B (RhBG), we identified novel scavenger cell-specific proteins like basal transcription factor 3 (BTF3) and heat-shock protein 25 (HSP25). Interestingly, BTF3 and HSP25 were heterogeneously distributed among GS+ hepatocytes in mouse liver slices. Feeding experiments showed that RhBG expression was increased in livers from mice fed with high protein diet compared to standard chow. While spatial distributions of GS and carbamoylphosphate synthetase 1 (CPS1) were unaffected, periportal areas constituted by glutaminase 2 (GLS2)-positive hepatocytes were enlarged or reduced in response to high or low protein diet, respectively. The data suggest that the population of perivenous GS+ scavenger cells is heterogeneous and not uniform as previously suggested which may reflect a functional heterogeneity, possibly relevant for liver regeneration.
Anti-inflammatory dihydroxanthones from a Diaporthe species
Authors: Rohr Markus , Kiefer Anna Maria , Kauhl Ulrich , Groß Jonathan , Opatz Till , Erkel Gerhard 
Published: August 2021

Abstract
In a search for anti-inflammatory compounds from fungi inhibiting the promoter activity of the small chemokine CXCL10 (Interferon-inducible protein 10, IP-10) as a pro-inflammatory marker gene, the new dihydroxanthone methyl (1R, 2R)-1,2,8-trihydroxy-6-(hydroxymethyl)-9-oxo-2,9-dihydro-1H-xanthene-1-carboxylate (2) and the previously described dihydroxanthone AGI-B4 (1) were isolated from fermentations of a Diaporthe species. The structures of the compounds were elucidated by a combination of one- and two-dimensional NMR spectroscopy, mass spectrometry, and calculations using density functional theory (DFT). Compounds 1 and 2 inhibited the LPS/IFNγ induced CXCL10 promoter activity in transiently transfected human MonoMac6 cells in a dose-dependent manner with IC50 values of 4.1 µM (±0.2 µM) and 1.0 µM (±0.06 µM) respectively. Moreover, compounds 1 and 2 reduced mRNA levels and synthesis of pro-inflammatory mediators such as cytokines and chemokines in LPS/IFNγ stimulated MonoMac6 cells by interfering with the Stat1 and NFκB pathway.
Der dritte Mann. Versöhnungen von Aristokraten in der späten Republik
Authors: Timmer Jan Martin 
Published: August 2021

Zusammenfassung
Die Versöhnung von Aristokraten war in der römischen Republik von besonderer Bedeutung. Auf der einen Seite lieferten sie sich einen erbitterten Konkurrenzkampf um Ämter und Prestige bei gleichzeitig hoher Bedeutung persönlicher Ehre, auf der anderen Seite war das politische System auf weitgehende Einmütigkeit der relevanten Akteure angewiesen. Der zentrale Mechanismus war die Versöhnung der Konfliktparteien über Dritte. Dabei handelt es sich um ein Phänomen, das aus der Umwelt des Politischen in dieses transferiert wurde, wesentliche Eigenschaften dabei beibehielt, sich aber zugleich weiterentwickelte und mit der Ausbildung von Rollen, definierter Referenzgruppen und spezifischer Argumente den Bedürfnissen des politischen Systems anpaßte.
Tatort Tana. Die Rolle Lateineuropas in der Sklavenökonomie des Schwarzmeerraums (ca. 1300–1500)
Authors: Schiel Juliane 
Published: August 2021

Zusammenfassung
Die lateineuropäische Haussklaverei des Spätmittelalters gilt in der Forschung gemeinhin als ein Nebenprodukt konvergierender wirtschaftlicher, diplomatischer und militärstrategischer Interessen zwischen Ägypten, Genua und der Goldenen Horde in Zentralasien und Nahost. Als die italienischen Seehandelsschiffe die Knaben und Männer der Sklavenmärkte von Tana und Kaffa für die mamlukische Armee über das Mittelmeer verschifften, gelangten deren Mütter und Schwestern zunehmend auf demselben Wege als Haussklavinnen nach Südeuropa. Während man die Lebenssituation dieser jungen Frauen ab dem Moment, in dem sie in einem lateinischen Handels- oder Notariatsregister als „schiava“ geführt werden, relativ gut erschließen kann, lässt die Überlieferung für die Zeit davor – den Moment des Sklavewerdens – kaum Verlässliches zu. Der vorliegende Aufsatz widmet sich dieser Leerstelle. Durch die Identifizierung und mikrohistorische Auswertung fragmentarischer Überlieferung wird ein Möglichkeitsraum entworfen, innerhalb dessen Menschen zu Sklaven/-innen der Lateiner werden konnten. Dabei wird gezeigt, dass die Lateiner nicht nur Lieferanten und sekundäre Abnehmer einer bestehenden Sklavenökonomie waren, sondern auch selbst als Versklavende auftraten. Die Logiken der Gewalt ebenso wie die Tausch- und Geschenkkultur der Frontiergesellschaft des Schwarzmeerraums existierten nicht losgelöst vom Machtapparat der expandierenden Seehandelsimperien Lateineuropas; sie waren eine wichtige Voraussetzung ihres Erfolgs.
Die Geburt der Wohngemeinschaft. Die Saint-Simonisten in Paris und Ménilmontant, 1825–1835
Authors: Barth Volker 
Published: August 2021

Zusammenfassung

Der Beitrag untersucht die Entstehung alternativer Lebensformen in den 1820er und 1830er Jahren. Als Untersuchungsgegenstand dienen die verschiedenen Wohnexperimente der französischen Saint-Simonisten in Paris und insbesondere deren gemeinschaftliche Unterkunft in Ménilmontant. Es wird gefragt, warum bereits im frühen 19. Jahrhundert innovative Formen des Wohnens als Keimzellen einer neuen Gesellschaft imaginiert wurden und mit welchen kulturellen, sozialen und politischen Zielsetzungen Alltagspraktiken neu organisiert und ideologisch überhöht wurden. Dazu werden zunächst die Entstehung und Radikalisierung der saint-simonistischen Gemeinschaft erläutert, bevor auf öffentliche Diskurse und staatliche Repressionen eingegangen wird. Diese werden im letzten Teil in einen analytischen Bezug zu den Wohngemeinschaften der 1960er Jahre gesetzt.
In der Schwebe. Markt, Staat und Wettbewerb in Deutschland zwischen 1918 und 1948
Authors: Hederer Franz , Priemel Kim Christian 
Published: August 2021

Zusammenfassung
Die erste Hälfte des 20. Jahrhunderts ist gerade in Deutschland von markanten politischen und ideologischen Brüchen gekennzeichnet, die sich tief in das kollektive Gedächtnis eingegraben haben, ohne aber unsere Wahrnehmung von Ökonomie und Staat im gleichen Zeitraum nachhaltig zu prägen. In vorliegendem Beitrag wird für einen Perspektivwechsel plädiert, um mittelfristig persistente Strukturen in den Debatten um das vermeintlich richtige Verhältnis von Markt, Staat und Wettbewerb freizulegen. Erkennbar werden so die Konturen einer „unausgetragenen“ Wirtschaftsordnung, um deren Ausrichtung zwischen den 1910er Jahren und den späten 1940ern erbittert gerungen wurde, und die doch stets in der Schwebe blieb. Die zeitgenössischen Kontroversen lassen sich als Suche nach einem kohärenten Prinzip interpretieren, die erst in der frühen Bundesrepublik ihren einstweiligen Abschluss fand. Denn die zunächst ambitionierten, dann pragmatischen Versuche in der Weimarer Republik, die Beziehungen der privaten Marktakteure zueinander und zum Gemeinwesen auf eine neue Grundlage zu stellen, vermochten im Spannungsfeld von ökonomischen Problemen und tagespolitischen Nöten nur eine fragile, beständig herausgeforderte Struktur auszuformen. Die Lösungsansätze dieses wirtschafts- und verfassungsrechtlichen Ordnungsproblems, das durch die Delegitimierung des klassisch-liberalen wie des zwangswirtschaftlichen Paradigmas infolge des Ersten Weltkrieges aufgeworfen worden war, blieben somit bis in die zweite Nachkriegszeit nur tentativ, ehe sich mit ordoliberalen Ansätzen, durch inhaltliche Häutungen, personale Kontinuitäten und historische Kontingenzen bedingt, ein neues Prinzip durchzusetzen vermochte – und schon bald verklärt wurde.
Diskurs, Narrativ, Sonderweg, Hitler, Turn. Konjunkturen geschichtswissenschaftlicher Begriffe im „Clio Viewer“
Authors: Wehrheim Lino , Jopp Tobias A. , Spoerer Mark 
Published: August 2021

Zusammenfassung
Auf Anregung einer (nichtrepräsentativen) Twitterumfrage unter Historikerinnen und Historikern möchten wir in diesem Beitrag ein von uns zusammengetragenes Korpus an Aufsätzen aus elf geschichtswissenschaftlichen Fachjournalen vorstellen und anhand einiger Beispiele illustrieren, wie sich der Gebrauch verschiedener prägnanter geschichtswissenschaftlicher (Leit‑) Begriffe seit 1950 verändert hat. Das Ziel ist nicht, eine „digitale Begriffsgeschichte“ verschiedener Begriffe vorzulegen oder gar Rückschlüsse auf die Entwicklung des Fachs zu ziehen. Vielmehr geht es uns darum, die vorgeschlagenen und um eigene Kandidaten ergänzten Begriffe und deren Konjunkturen zu präsentieren, um so eine Grundlage für eine weitergehende Diskussion digitalhistorischer Methoden und des Nutzens eines „Clio Viewers“ zu legen. Besonderes Augenmerk richten wir auf die Erörterung der mit dem Einsatz einfacher Stichwortsuchen verbundenen methodischen Fallstricke.
CFD-based simulation to reduce greenhouse gas emissions from industrial plants
Authors: Sarjito  , Elveny Marischa , Jalil Abduladheem Turki , Davarpanah Afshin , Alfakeer Majda , Awadh Bahajjaj Aboud Ahmed , Ouladsmane Mohamed 
Published: August 2021

Abstract
Greenhouse gas (GHG) pollution is considered one of the challenging concerns in industrial plants, and to emit the appropriate designation in nitrogen oxide reduction, it is required to implement proper numerical simulation procedures. In this study, ANSYS Fluent® software is used as dynamic software to solve heat and mass flow transfer numerically by considering non-structured networks for complex geometries. Dry nitrogen oxide burners have an additional thermocouple to provide an extra fuel pathway to combine with air. Then, standard K-ε is used in the numerical simulations to calculate thermal efficiency in combustion processes for turbulent flow regimes. It can cause the removal of 50% of nitrogen oxide into the atmosphere. Furthermore, by the increase of temperature, nitrogen oxide concentration has been increased in the system. After 1975 K, Fuel has been changed to dry fuel, and therefore nitrogen oxide concentration increased because the steam can provide a relatively non-combustible compound increase than fuel. On the other hand, regarding the water volume increase at inlet steam, nitrogen oxide volume percentage has been decreased dramatically, especially in the first periods of water volume increase. Consequently, when the steam percentage is increased instead of water, nitrogen oxide reduction is increased. Moreover, our simulation results have a proper match with Gibbs energy equilibrium.
Beneficiation of phosphate-siliceous slates via acetic acid
Authors: Raiymbekov Yerkebulan , Besterekov Uilesbek , Abdurazova Perizat , Nazarbek Ulzhalgas , Kambarova Galiya , Petropavlovskiy Igor 
Published: August 2021

Abstract
Low grade phosphate-siliceous slates dump samples (about 11.98% P2O5) from Zhanatas deposit, Karatau basin, Kazakhstan were subjected to upgrading in the present study. The suggested upgrading route was to get rid of most of the inorganic carbonates via leaching using organic acids like acetic acid. The effect of leaching temperature, dissolution time, and solid/liquid ratio were studied as the main determental working parameters. It was concluded that a concentrate product containing about 21% P2O5 was produced after leaching with acetic acid at optimum conditions: 30 C0, 15 min, and 3:1 liquid/solid ratio. The calculated apparent activation energy of the leaching process showed that the process took place in the intra-diffusion region.
Application of modified Mickens iteration procedure to a pendulum and the motion of a mass attached to a stretched elastic wire
Authors: Gholami Amin , Ganji Davood D. , Rezazadeh Hadi , Adel Waleed , Bekir Ahmet 
Published: August 2021

Abstract
The paper deals with the application of a strong method called the modified Mickens iteration technique which is used for solving a strongly nonlinear system. The system describes the motion of a simple mathematical pendulum with a particle attached to it through a stretched wire. This model has great applications especially in the area of nonlinear vibrations and oscillation systems. The proposed method depends on determining the frequency and amplitude of the system through the modified Mickens iterative approach which is a modification of the regular Mickens approach. The preliminaries of the proposed technique are present and the application to the model is discussed. The method depends on the Mickens iteration approach which transforms the considered equation into a linear form and then is solving this equation result in the approximate solution. Some examples are given to validate and illustrate the effectiveness and convenience of the method. These results are compared with other relative techniques from the literature in terms of finding the frequency of the two examined models. The method produces more accurate results when compared to these methods and is considered a strong candidate for solving other nonlinear problems with applications in science and engineering.
Weak and strong boundedness for p-adic fractional Hausdorff operator and its commutator
Authors: Sarfraz Naqash , Gürbüz Ferit 
Published: August 2021

Abstract
In this paper, the boundedness of the Hausdorff operator on weak central Morrey space is obtained. Furthermore, we investigate the weak bounds of the p-adic fractional Hausdorff operator on weighted p-adic weak Lebesgue spaces. We also obtain the sufficient condition of commutators of the p-adic fractional Hausdorff operator by taking symbol function from Lipschitz spaces. Moreover, strong type estimates for fractional Hausdorff operator and its commutator on weighted p-adic Lorentz spaces are also acquired.
Nonparametric inference for interventional effects with multiple mediators
Authors: Benkeser David , Ran Jialu 
Published: August 2021

AbstractUnderstanding the pathways whereby an intervention has an effect on an outcome is a common scientific goal. A rich body of literature provides various decompositions of the total intervention effect into pathway-specific effects. Interventional direct and indirect effects provide one such decomposition. Existing estimators of these effects are based on parametric models with confidence interval estimation facilitated via the nonparametric bootstrap. We provide theory that allows for more flexible, possibly machine learning-based, estimation techniques to be considered. In particular, we establish weak convergence results that facilitate the construction of closed-form confidence intervals and hypothesis tests and prove multiple robustness properties of the proposed estimators. Simulations show that inference based on large-sample theory has adequate small-sample performance. Our work thus provides a means of leveraging modern statistical learning techniques in estimation of interventional mediation effects.
In silico gene knockout prediction using a hybrid of Bat algorithm and minimization of metabolic adjustment
Authors: Man Mei Yen , Mohamad Mohd Saberi , Choon Yee Wen , Ismail Mohd Arfian 
Published: August 2021

Abstract
Microorganisms commonly produce many high-demand industrial products like fuels, food, vitamins, and other chemicals. Microbial strains are the strains of microorganisms, which can be optimized to improve their technological properties through metabolic engineering. Metabolic engineering is the process of overcoming cellular regulation in order to achieve a desired product or to generate a new product that the host cells do not usually need to produce. The prediction of genetic manipulations such as gene knockout is part of metabolic engineering. Gene knockout can be used to optimize the microbial strains, such as to maximize the production rate of chemicals of interest. Metabolic and genetic engineering is important in producing the chemicals of interest as, without them, the product yields of many microorganisms are normally low. As a result, the aim of this paper is to propose a combination of the Bat algorithm and the minimization of metabolic adjustment (BATMOMA) to predict which genes to knock out in order to increase the succinate and lactate production rates in Escherichia coli (E. coli).
The deal.II library, Version 9.3
Authors: Arndt Daniel , Bangerth Wolfgang , Blais Bruno , Fehling Marc , Gassmöller Rene , Heister Timo , Heltai Luca , Köcher Uwe , Kronbichler Martin , Maier Matthias , Munch Peter , Pelteret Jean-Paul , Proell Sebastian , Simon Konrad , Turcksin Bruno , Wells David , Zhang Jiaqi 
Published: August 2021

Abstract
This paper provides an overview of the new features of the finite element library deal.II, version 9.3.
Optical data center switches design and analysis
Authors: Nigam Anjaney , Mishra Bharat , Patel Prabhat 
Published: August 2021

Abstract
Data centers are facing huge bottlenecks due to the emergence of high-speed data applications. To meet speed requirements, it is proposed to shift the current technologies toward optical communication-enabled data center (DC) devices. This paper discusses the recently proposed optical switch designs and proposes a novel switch design for optical DCs. The architectures proposed in the literature are compared in terms of notable parameters. Finally, proposed switch performance is measured in the network using Monte Carlo simulation and results are obtained in terms of packet loss probability, under a random traffic model while considering both nonperiodized and prioritized packets.
Novel method for trisomy 21 screening in the first trimester of pregnancy: fetal brain angle
Authors: Karslı Mehmet Fatih , Çakmak Bülent , Şen Cihat 
Published: August 2021

Abstract

Objectives
The present study was performed to examine the utility of a new first trimester marker called the “brain angle” (BA) in screening for trisomy 21. We postulate that differences in the midbrain anatomy between euploid fetuses and those that are affected by trisomy 21 are reflected in changes in BA measurements.

Methods
In fetuses at 11+0–13+6 weeks of gestations, which were at high risk for trisomy 21, the angle was measured between the line crossing the thalamus and mesencephalon cranial border tangentially and the line crossing the brainstem lower limit. This angle was compared between fetuses with trisomy 21 (based on karyotyping) and those with a normal karyotype.

Results
Trisomy 21 was detected in 45 (8%) of 560 fetuses. Receiver operating characteristic analysis showed that, at BA≥94°, the sensitivity and specificity for determining trisomy 21 were 97.8% (95% CI=88.2–99.9%) and 100% (95% CI=99.2–100%), respectively.

Conclusions
Fetal BA appears to be a promising new first trimester marker in screening for trisomy 21.
Fekete-Szegö problem for starlike functions connected withk-Fibonacci numbers
Authors: Bulut Serap 
Published: August 2021

AbstractIn a recent paper, Sokół et al. [Applications of k-Fibonacci numbers for the starlike analytic functions, Hacet. J. Math. Stat. 44(1) (2015), 121{127] obtained an upper bound for the Fekete-Szegö functionalϕλwhenλ 2R of functions belong to the classSLkconnected withk-Fibonacci numbers. The main purpose of this paper is to obtain sharp bounds forϕλbothλ 2R andλ 2C.