bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cardiac manifestations and diagnostic imaging in pediatric inflammatory multisystem syndrome temporally associated with COVID-19: a systematic review
Authors: Octavius Gilbert Sterling , Tan Ricardo , Pratama Teodorus Alfons , Budiputri Charista Lydia , Meliani Fellisa , Heriyanto Rivaldo Steven , Muljadi Rusli , Juliansen Andry 
Published: March 2022

BACKGROUND Several studies have reported pediatric inflammatory multisystem syndrome temporally associated with COVID-19 (PIMS-TS) cases with their cardiac manifestations, but only few studies synthesize the cardiovascular characteristics in children with PIMS-TS. However, detecting cardiac abnormalities is crucial in improving patients' outcomes and reducing mortality. This review aimed to summarize the overall symptoms, laboratory, and workup findings in PIMS-TS patients, focusing on cardiovascular manifestations.
METHODS We searched 4 medical databases (PubMed, Science Direct, Medline, and Scielo) and 4 preprint databases (Medrxiv, Research Square, SSRN, and Biorxiv). The literature search was done on November 8, 2021. All case reports, case series, cross-sectional studies, cohort studies, and possible clinical trials published from December 2020 onward that studied PIMS-TS on cardiac manifestation (aged 0–18 years) were included. Studies on multisystem inflammatory syndrome in children, animal studies, and studies without full-text availability were excluded. This review was registered in PROSPERO (CRD42021194468).
RESULTS 59 studies were included with a total of 698 patients. The most common cardiovascular findings were the presence of cardiogenic shock (37%) and hypotension (8.5%). Almost all laboratory values were deranged. Cardiac computed tomography scan mostly showed normal results (56%), followed by cardiomegaly with pericardial effusion (14%). Electrocardiography showed normal findings (46%), ST-segment abnormalities (32%), and abnormal T wave (12%). Echocardiography findings showed left ventricle dysfunction (40.6%), which can be considered most significant, followed by pericardial effusion together with pericarditis (11.4%) and tricuspid regurgitation (6.9%).
CONCLUSIONS This review found various cardiac abnormalities that may develop during PIMS-TS. Due to these findings, we should be more vigilant and not underestimate the consequences in pediatric COVID-19 patients.
2 ng/√Hz-resolution optomechanical accelerometer employing a three-dimensional MEMS interferometer
Authors: Li Cheng , Yang Bo , Zheng Xiang , Guo Xin , Sun Zhenyu , Zhou Luqiang , Huang Xin 
Published: March 2022

A portable and high-resolution optomechanical accelerometer employing a deformable grating-based micro-electro-mechanical system (MEMS) interferometer is presented in this Letter. The movable reflective mirror of this interferometer is realized by a low-frequency vertical sensing structure with a three-dimensional (3D)-spring construction, which, to the best of our knowledge, is first proposed and fabricated in this work. All the components of the sensor are packaged in a metal case with a compact size of 4 cm×6 cm×3.15 cm. The micrometer-scale springs permit the device to have a high mechanical sensitivity of 893.23 µm/g and a resultant self-noise below 2 n

g

/

H
z

from 2 to 7 Hz. Meanwhile, the measured voltage responsivity is as high as 15,874 V/g, demonstrating it is one of the most sensitive accelerometers reported to date.
The views of the preschool children in the countryside and city zones regarding environmental pollution
Authors: BAĞÇELİ KAHRAMAN Pınar , YILMAZ Sevgi Nur , İLYAS Gülzire 
Published: March 2022

The
purpose of this research is to determine the ideas of the preschool children
that live in the countryside and in the cities regarding the environmental
pollution. Within this study, in which the qualitative research model was used,
phenomenological pattern was used. The
study was performed with 30 preschool children. The data of the research were
obtained using group interview and expression technique with pictures.
According to the results of the environmental perception is limited with the
livings and the concrete objects they encounter in daily life. However, when
the pictures they drew concerning the environment they live in were examined,
the results indicated difference.
Comparative Study on the Various Hydrolysis and Fermentation Methods of Chlorella vulgaris Biomass for the Production of Bioethanol
Authors: Megawati Megawati , Bahlawan Zuhriyan Ash Shiddieqy , Damayanti Astrilia , Putri Radenrara Dewi Artanti , Triwibowo Bayu , Prasetiawan Haniif 
Published: March 2022

One of the microalgae that can be potentially used to produce bioethanol is Chlorella vulgaris, as it is rich in carbohydrates. However, the carbohydrates in C. vulgaris cannot be converted directly into ethanol. This study aimed to investigate the chemical and enzymatic hydrolysis of C. vulgaris, which is subsequently followed by fermentation. The catalysts used in the chemical hydrolysis were hydrochloric acid, sodium hydroxide, and potassium hydroxide, while the enzymes used were the mixture of alpha-amylase + glucoamylase, alpha-amylase + cellulase, and alpha-amylase + glucoamylase + cellulase. The hydrolysate obtained from chemical hydrolysis was fermented through Separate Hydrolysis Fermentation (SHF), while the one from enzymatic hydrolysis was fermented through Simultaneous Saccharification and Fermentation (SSF), in which both processes used S. cerevisiae. After undergoing five hours of enzymatic hydrolysis (using alpha-amylase + glucoamylase), the maximum glucose concentration obtained was 9.24 ± 0.240 g/L or yield of 81.39%. At the same time and conditions of the substrate on chemical hydrolysis, glucose concentration was obtained up to 9.23 + 0.218 g/L with a yield of 73.39% using 1 M hydrochloric acid. These results indicate that chemical hydrolysis is less effective compared to enzymatic hydrolysis. Furthermore, after 48 hours of fermentation, the ethanol produced from SHF and SSF fermentation methods were 4.42 and 4.67 g/L, respectively, implying that producing bioethanol using the SSF is more effective than the SHF method.
African’s Information and Communications Technology (ICT), Innovations and Economic Growth- Towards region integration: Empirical Evidence of Dynamic GMM Panel Data Approach.
Authors: Khater Ahmed Mohammed 
Published: March 2022

Current literature on economic growth and development uniformly affirms the consensus that Information and Communication Technology ICTs (here defined as the composite index using 11 indicators as developed by (ITU)) is indispensable for economic growth and enhancing a wide range of development indices. It is common knowledge today that Information and Communication Technology (ICT) -whether embodied in human skills, capital goods, practices and organizations—are the key drivers of economic growth and sustainable development of nations and regions. The integration, growth and competitiveness of the economies of the East African Community (EAC) depend on Information and Communication Technology (ICT) and innovation.
This paper examines the impact of Information and Communication Technology (ICT) use on economic growth using the Generalized Method of Moments (GMM) estimator within the framework of a dynamic panel data approach and applies it to five East Africa community Countries (EAC) countries over the period 2000 to 2018.The results indicate that there is a positive relationship between real GDP Growth and ICT Development index (as a composite index measured by the number of indicators which are, ICT readiness reflecting the level of network infrastructure and access to ICTs, ICT intensity reflecting the level of use of ICT in the society and ICT (skills) impact reflecting the result/outcome of efficient and effective ICT user). This implies that if these countries seek to enhance their economic growth, they need to implement specific policies that facilitate ICT development.
The ﬁve Partner countries of the EAC should make closer cooperation strategies, systematic and signiﬁcant regional integration arrangements in the generate and application of new knowledge and technological innovations, their ambitions to grow their economies, achieve Millennium Development Goals (MDGs) targets, deepen economic and political integration and attain sustainable development.
The influence of a Pandemic on Decision Making
Authors: Jarrett Jeffrey 
Published: March 2022

A Discussion of Capital budgeting models will be discussed in this manuscript to bring forth the notion that present value of cash flows is often improperly estimated. Financial models utilized in the decision analytic process. In particular, intellectual property rights and other intangible assets often are often not considered in accounting estimation processes utilized in financial accounting (Jarrett, 2021). A decision maker often utilizes misestimates of the present value of cash flow resulting in less-than-optimum capital budgeting decisions. Decisions to abandon for salvage, sale and other disposal methods improve when the present value of intangibles and property rights are included in the decision process. In particular, this last statement improves the estimation process in financial accounting, finance and abandonment and decision theoretic decisions in capital budgeting which are well-founded results in abandonment of property in both intellectual f this study as well as to present well-founded processes to improve abandonment in capital budgeting decisions involving cost estimation, matching of costs and revenues and equivalent problems in the recognition revenues with costs in financial decision processes.
Discussion of foundation of mathematics and quantum theory
Authors: Lev Felix M. 
Published: March 2022

Abstract
Following the results of our recently published book [F. Lev, Finite Mathematics as the Foundation of Classical Mathematics and Quantum Theory. With Applications to Gravity and Particle Theory, Springer, 2020, ISBN 978-3-030-61101-9], we discuss different aspects of classical and finite mathematics and explain why finite mathematics based on a finite ring of characteristic

p

p

is more general (fundamental) than classical mathematics: the former does not have foundational problems, and the latter is a special degenerate case of the former in the formal limit

p
→
∞

p\to \infty

. In particular, quantum theory based on a finite ring of characteristic

p

p

is more general than standard quantum theory because the latter is a special degenerate case of the former in the formal limit

p
→
∞

p\to \infty

.
Microstructure and fatigue performance of Cu-based M7C3-reinforced composites
Authors: Yilmaz S. Osman , Teker Tanju , Karabeyoğlu S. Süreyya 
Published: March 2022

Abstract
Cu\Fe–Cr–C metal matrix composites (MMCs) were produced with a reinforcer addition of 6, 9, 12, 15, and 18 wt% Fe–Cr–C by powder metallurgy. The effects of sintering temperatures on Cu-based Fe–Cr–C-reinforced composites were studied using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), and hardness test. The electrical conductivity and tensile and fatigue strengths of samples were investigated by the conductivity meter and the tensile and fatigue testing machine. The interface microstructure between Fe–Cr–C and Cu particulates at 1000 °C showed a significant difference. The increase in tensile strength, hardness, and fatigue life gave a proportional change with an increase in Fe–Cr–C particulate vol%. The precipitated carbides and intermetallic compositions reduced electrical resistivity depending on the sintering temperature.
Improvement of the structural, thermal, and mechanical properties of polyurethane adhesives with nanoparticles and their application to Al/Al honeycomb sandwich panels
Authors: Çetin Mehmet Emin 
Published: March 2022

Abstract
Understanding the relationship between core/face adhesive interface and performance of MWCNT added nanoadhesives are essential for better designing and fabrication of aluminum honeycomb sandwich panels. In this study, we used multi-walled carbon nanotubes (MWCNTs) to prepare enhanced interfacial adhesion between honeycomb core and aluminum facesheet. MWCNTs are first introduced to isocyanate, and then MWCNTs/isocyanate blend poured into polyol to produce MWCNTs reinforced polyurethane (PU) nanoadhesives. The relationship between core/face adhesive interface and performance of MWCNT added nanoadhesives are investigated in detail in terms of thermogravimetric analyses (TGA), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, edge-wise compression tests, flat-wise tensile tests and three-point bending tests The experimental results showed that the MWCNT addition to PU adhesive led to enhanced thermal stability, flat-wise tensile strength and edge-wise compression strength for sandwich structures. This study gives a significant reference indicator on the fabrication of an improved core/face interface for obtaining sandwich panels with desired mechanical properties.
Fatigue behavior of bolted boreholes under various preloads
Authors: Szlosarek Robert , Kröger Matthias 
Published: March 2022

Abstract
Bolted joints are one of the most used joining technologies in engineering. It is possible to join different kind of materials and to transmit heavy loads. Nevertheless, they are vulnerable to fatigue cracks. The present research investigates the dependency between the preload of the bolt and the initiation of a fatigue crack in the bolted sheet. Therefore, a representative bolt connection with a bolt of size M22 was selected in combination with a 5 mm thick sheet made of steel S355MC (1.0976). The bolted sheet was loaded by a fluctuating tension load and a load ratio of 0.1. The test results show a strong correlation of the preload and the number of load cycles to crack for preloads from 0 kN to 30 kN. The load cycles to crack are increased by about factor 20 by using a preload in contrast to the sheet without any preload. For higher preloads, the load cycles to crack does not change considerably. However, the crack initiation location changes by increasing the preload. For small preloads, the crack starts at the bolt hole, and for high preloads, the crack starts at the fretting zone.
Mechanical properties of wire arc additive manufactured carbon steel cylindrical component made by cold metal transferred arc welding process
Authors: Bellamkonda Prasanna Nagasai , Sudersanan Malarvizhi , Visvalingam Balasubramanian 
Published: March 2022

Abstract
Wire arc additive manufacturing (WAAM) offers high-quality technology for producing large complex geometry structures in close proximity to near-net form, using cost-effective manufacturing resources, such as welding and wiring materials. In this study, the cold-metal-transfer-based WAAM system was utilized to manufacture the steel cylindrical component. The mechanical properties and microstructure analysis of the component were analyzed at two regions (bottom and top region) along the building direction. The results showed that the microstructure of the part differed from the bottom to the top region, resulting in a hardness difference between 169 and 181 (Hv0.5), and impact toughness varied from 72 to 80 J. There were also anisotropic features in the tensile properties: the yield strength and the ultimate tensile strength ranging from 401 to 457 MPa and between 492 and 543 MPa, respectively.
Analysis of the Bell-Making Process from the Middle Ages to Recent Times
Authors: Audy K. , Audy J. 
Published: March 2022

Abstract
This paper is focused on the evaluation and characterization of bells from the designing, forming and casting point of view. The principles and procedures associated with the production and fabrication of bells from the Middle Ages to the recent time were assessed and classified. A principal intention of this study was to identify features that relate to the quality of bells made in different centuries. Our information was derived from experimental investigations conducted on bells from various parts of the world, especially Europe and Australasia, as well as from historical documentation. The major focus was on a number of interrelated aspects, namely, bell design and sound development, forming process, and alloy type – composition, constitution and properties. In addition, metallographic examination and chemical analysis of selected specimens taken from various bells cast from the 15th to the 20th century was carried out in order to understand certain characteristics of, and relating to, the manufacturing process routes associated with the bells investigated, as influenced by alloy type, composition and desired microstructure. A set of representative unpublished photographs was presented to document the typical sequence of individual operations used in the production of bells cast during the 1920s in a European foundry. Moreover, examples from microstructures of bells cast in different countries and eras were presented to show the effect of cooling rate on the bell-material, grain shape and size caused by different properties of the forming mixtures used to prepare the bell mould. Finally, the influence of various elements in bell material compositions was appraised in the overall content of bell design.
Gefüge hybrider Verbundstrangpressprofile auf Aluminiumbasis
Authors: André Weidenmann Kay , Matthias Klaska Arne , Kerscher Eberhard , Löhe Detlef 
Published: March 2022

KurzfassungVor dem Hintergrund der nachgewiesenen Verbesserungsmöglichkeiten der mechanischen Eigenschaften von Strangpressprofilen durch das Verbundstrangpressen metallischer Matrixmaterialien mit metallischen Verstärkungselementen stellt sich die Frage nach dem Potential des hybriden Verbundstrangpressens unter Verwendung von metallischen und nichtmetallischen Komponenten. In der vorliegenden Arbeit wurden hybride Strangpressprofile basierend auf der Aluminiumlegierung EN AW-6060, die mit einem Verbunddraht aus 60 Vol.-% Nextel Aluminiumoxidfasern und 40 Vol.-% EN AW-1099 verstärkt wurde, sowie basierend auf dem Verbundwerkstoff EN AW-6061 verstärkt mit 15 Vol.-% Al2​O3-Partikeln, der mit einem Federstahldraht verstärkt wurde, hergestellt und metallographisch charakterisiert. Mittels einer eigens angefertigten Strangpressvorrichtung, die auf einer Universalprüfmaschine betrieben wurde, konnten 20 mm lange Prüfkörper bei Presstemperaturen von 450 °C hergestellt werden. Die anschließende Charakterisierung in Licht- und Rasterelektronenmikroskop zeigte eine spaltfreie Einbettung der Drähte in die Matrixwerkstoffe, was auf eine gute Draht/Matrix-Bindung hindeutet. Dabei ist zu vermuten, dass das hybride Strangpressen eine deutliche Verbesserung der mechanischen Eigenschaften verglichen mit nicht-hybriden Profilen ermöglicht. Während des Pressprozesses trat kein Abreißen der Drahtverstärkungen auf. Wie auch schon beim Verbundstrangpressen metallischer Komponenten sind auch bei der Herstellung hybrider Strangpressprofile gerade bei der Verwendung von Verbundmatrices sehr große Presskräfte nötig. Darüber hinaus ist bei der Verwendung verstärkter Matrices mit hohem Werkzeugverschleiß zu rechnen.
Unique supramolecular assembly of a synthetic achiral α, γ-hybrid tripeptide
Authors: Dutta Arpita , Das Suven , Das Purak , Maity Suvendu , Ghosh Prasanta , Biswas Soumya Shankha 
Published: March 2022

Abstract
An achiral tripeptide, namely, Boc-γ-Abu-m-ABA-Aib-OMe (γ-Abu: γ−amino butyric acid; m-ABA: meta-aminobenzoic acid) was synthesized by solution phase procedure. The α, γ-hybrid peptide was designed in such a way that two dissimilar γ−amino acids, one flexible and another rigid, were positioned sidewise along with α-amino isobutyric acid (Aib) as C-terminal residue. The single crystal X-ray diffraction analysis revealed that two kinks were generated around centrally placed m-ABA. Interestingly, the peptide self-assembled via three intermolecular N–H···O and one intermolecular C–H···O hydrogen bonding interactions to supramlecular helical architecture.
Effizientes Personalmanagement
Authors: Neubig Nadja 
Published: March 2022

Abstract
Innovation, Kompetenz, Effizienz, Verantwortungsbewusstsein – alle diese Begriffe treffen sowohl für die Produkte der Maschinenfabrik Bernard Krone GmbH als auch für die Fertigung in Spelle zu. Besonders bei den Prestigeprodukten Big X und Big M zeigt sich die Innovationskraft des Unternehmens. Um mit dem ernst zu nehmenden und auf Leistung ausgerichteten Wettbewerb mithalten zu können, setzt Krone in der eigenen Produktion unter anderem auf das Personalmanagement des Manufacturing Execution Systems (MES) HYDRA von MPDV.
MEFV Mutations in IBD Patients: A Systematic Review and Meta- analysis
Authors: Papadopoulos Vasileios P , Antoniadou Christina , Ritis Konstantinos , Skendros Panagiotis 
Published: March 2022

Background and Aims: Several studies have suggested that mutations in MEFV, the gene responsible for familial Mediterranean fever (FMF), are frequently detected in inflammatory bowel disease (IBD) patients. We aimed to provide further evidence regarding a potential correlation between MEFV gene mutations and IBD by identifying all relevant studies and analyzing their results.
Methods: EMBASE, PubMed/MEDLINE, and Google Scholar were used to identify all studies that published until January 2021 and reported MEFV mutation patterns in patients with ulcerative colitis (UC), Crohn’s disease (CD) and indeterminate colitis (IC) with or without a control group. The Newcastle-Ottawa quality assessment scale was used to appraise the quality of the included studies.
Results: Thirteen observational studies, including 937 patients and 977 controls, were analyzed. MEFV mutation rate in IBD patients was 0.238 (95%CI: 0.209-0.270; I 2 =95%); MEFV mutated alleles were more frequent in IBD patients when compared with controls (p=0.03 for UC, p=0.01 for CD and IC). Subgroup analysis indicated that MEFV mutations were increased in patients with IC when compared with UC and CD (I 2 =91%, p<0.001). Patients with extra-intestinal manifestations and pancolitis had 2.57 (95%CI 1.07-6.14; p=0.03) and 2.02 (95%CI: 1.01-4.04, P=0.049) odds ratios to carry MEFV mutant genotypes, respectively. Exon 10 mutations had the most serious impact. No source of heterogeneity was detected.
Conclusions: MEFV mutations are common in IBD and are linked with the presence of extra-intestinal manifestations and pancolitis. Further research to assess the clinical significance and evolutionary significance of MEFV mutations in IBD patients is warranted.