bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cell-phone Instruction and Academic Achievements of Undergraduates During Covid-19 Pandemic in Delta and Rivers States, Nigeria
Authors: Arumuru Lawrence , Arumuru  Oluchi Angel 
Published: November 2024

Rationale of Study -This research investigated the link between cell phone instruction platforms and the academic achievements of undergraduates in LIS during the Covid-19 pandemic in Delta, and Rivers states, Nigeria.
Methodology -The researchers reviewed relevant empirical literature and equally elicited responses from the respondents to establish the platforms used for cell phone instruction during Covid-19 Pandemic in Delta, and Rivers states, Nigeria.
Findings -The report showed that the clampdown during the Covid-19 pandemic led to the introduction of various cell phone instruction platforms like WhatsApp, Delsu Management Learning Software, and email in Delta and Rivers states in Nigeria as a buffering upshot in the educational field. The employment of various cell phone instruction platforms hurts students' academic achievement. Furthermore, it was found that employing mobile phone instruction platforms presented several difficulties for undergraduates, including poor internet connectivity and high subscription costs. These difficulties also contributed to the low satisfaction level felt by the students.
Implications -The study's findings can be used by university management in Delta, and Rivers states to develop a blueprint for adopting or enforcing cell phone instruction platforms alongside the face-to-face arrangement.
Originality -This study fills a gap in recent research on the effects of the shared repertoire and voluntary action of a community of practice on knowledge sharing
Physical development of infants born to patients with COVID-19 during pregnancy: 2 years of age
Authors: Eligulashvili Anna , Gordon Moshe , Nemerofsky Sheri , Havranek Tomas , Bernstein Peter , Yee Judy , Hou Wei , Duong Tim 
Published: November 2024

Background
SARS-CoV-2 infection during pregnancy and pandemic circumstances could negatively impact infant development. This study aimed to investigate the physical development, common pediatric illness incidence, and healthcare utilization over the first 2 years of life of infants born to COVID+ and COVID- patients. Comparisons were also made with infants born pre-pandemic.

Methods
This is a retrospective observational study at a major academic health system in New York City. Participants include all infants born to birthing persons with SARS-CoV-2 infection during pregnancy (N = 758) and without (N = 9,345) from 03/01/2020 to 08/17/2022, infants born pre-pandemic (N = 3,221) from 03/01/2017 to 08/17/2019, and birthing persons of all infants.

Results
There were no differences in weight, length, or head circumference curves between pandemic infants born to COVID+ and COVID- patients over the first 2 years of life (p > 0.05, repeated ANOVA). Annualized incidence of illness occurrence and healthcare utilization were similar between groups. Compared to pre-pandemic infants, the length of pandemic (COVID-) infants was lower from birth to 9 months (p < 0.0001). Pandemic infants additionally had more adverse perinatal outcomes including increased stillbirth (0.75% vs. 0.12%, p = 0.0001) and decreased gestational age (38.41 ± 2.71 vs. 38.68 ± 2.55 weeks, Cohen’s d = −0.10, p < 0.0001), birthweight (2,597 ± 335 vs. 3,142 ± 643 g, Cohen’s d = −1.06, p < 0.0001), and birth length (48.08 ± 4.61 vs. 49.09 ± 3.93 cm, Cohen’s d = −0.24, p < 0.0001).

Conclusions
Birthing persons’ SARS-CoV-2 infection status, birthing persons’ profiles, and pandemic circumstances negatively affected perinatal outcomes, newborn physical development, and healthcare utilization. These findings draw clinical attention to the need to follow infants closely and implement enrichment to ensure optimal developmental outcomes.
Real-Time Data Governance and Compliance in Cloud-Native Robotics Systems
Authors: Obioha-Val Onyinye , Selesi-Aina Oluwatosin , Kolade Titilayo Modupe , Gbadebo Michael Olayinka , Olateju Omobolaji Olufunmilayo , Olaniyi Oluwaseun Oladeji 
Published: November 2024

This study investigates the frameworks and challenges of real-time data governance and compliance in cloud-native robotics systems, focusing on data integrity, cloud security, regulatory adherence, and cybersecurity risks. Using extensive datasets from the Amazon AWS Open Data Registry, the EU GDPR Enforcement Tracker, and Kaggle’s IoT dataset, the analysis explores cloud-native systems' data accuracy, security, and governance. Data were extracted through a standardized process: performance metrics, including latency and error rates, were gathered from Amazon AWS to assess system efficiency, GDPR violation records were analyzed from the EU Enforcement Tracker to understand compliance trends, and data volume and governance metrics from Kaggle’s IoT dataset were correlated to identify governance challenges. Together, these data sources provide comprehensive insights into how cloud-native systems can be optimized for real-time operations. The study highlights the cloud security benefits and governance advantages inherent to cloud-native frameworks, such as real-time monitoring, automated threat detection, and data encryption, which collectively reduce unauthorized access risks while supporting operational efficiency. Findings indicate high data accuracy (0.51% error rate) and low latency (mean of 48.96 ms) across systems; however, processing time variability (standard deviation of 28.61 ms) signals a need for further optimization in time-sensitive environments. The regression analysis of GDPR violations reveals a substantial penalty increase of €53,789.41 per violation, emphasizing the financial risks of non-compliance. Correlation analysis (r = 0.083 for data volume and governance failures) suggests that external cybersecurity threats have a greater impact on governance than internal metrics, underscoring the importance of adaptive governance frameworks that support both data integrity and regulatory compliance in cloud-native robotics systems.
Regulation of the Gid ubiquitin ligase recognition subunit Gid4
Authors: Menssen Ruth , Bui Kim , Wolf Dieter H. 
Published: August 2018

Glucose consumption via glycolysis and its biosynthesis via gluconeogenesis are central reciprocal pathways controlled by a set of different enzymes. In the yeast Saccharomyces cerevisiae, expression of gluconeogenic enzymes is induced when cells are devoid of glucose. Availability of glucose immediately leads to inactivation and rapid degradation of these enzymes via the ubiquitin proteasome system. Polyubiquitination is carried out by the Gid complex, a multisubunit RING E3 ligase that constitutively consists of six different proteins. Upon addition of glucose to the medium, the substrate recognition subunit Gid4 appears within minutes and triggers ubiquitination of the gluconeogenic enzymes. Here, we show that Gid4 is tightly regulated on the transcriptional and protein level to ensure proper adjustment of gluconeogenesis.
Enhancement of Surface Chemical and Physical Properties of Germanium–Sulfur Thin Film Using a Water‐Supplemented Carbon Dioxide Supercritical Fluid Treatment Technique
Authors: Yang Chih‐Cheng , Chen Po‐Hsun , Shih Chih‐Cheng , Wang Ming‐Hui , Tsai Tsung‐Ming , Zheng Hao‐Xuan , Chen Wen‐Chung , Chen Min‐Chen , Huang Hui‐Chun , Ma Xiao‐Hua , Hao Yue , Huang Jen‐Wei , Sze Simon M. , Chang Ting‐Chang 
Published: August 2018

AbstractIn this study, an oxidation treatment technique suitable for the material and electronic device applications proceeding at low temperature (only 80 °C) and high pressure (3000 psi) utilizing a carbon dioxide (CO2) supercritical fluid (SCF), also known as scCO2, which is supplemented with water molecules, is reported. To demonstrate the possible effects on material and devices for the proposed SCF treatment, an amorphous germanium–sulfur (GeS) thin film and a GeS‐based resistance random access memory (RRAM) device are prepared. After the SCF treatment, electrical measurements confirm that the GeS‐based RRAM device exhibits a lower forming voltage, more stable resistance switching characteristics, and higher concentration distributions of high and low resistance states when compared to the device without SCF treatment. As for the material effects, both chemical and physical properties are examined based on material analyses results. It is concluded that the original amorphous GeS thin film transforms to a polycrystallized GeO film, confirmed by a reaction model for the SCF treatment illustrating possible oxidation and crystallization effects induced by this SCF treatment. This water‐enhanced scCO2 SCF treatment technique, thus, shows its capability as a feasible synthetic method for material modification as well as suitability for device level applications.
Recent Advance in Near‐Infrared (NIR) Imaging Probes for Cancer Theranostics
Authors: Liu Yuxin , Jia Qi , Zhou Jing 
Published: August 2018

AbstractWith the advantages of low biofluid scattering and minimal absorbance, light in a second near‐infrared window (NIR II, 1000–1700 nm) either as a signal or as an excitation source is preferred for bioimaging and disease diagnosis, especially for cancer theranostics. Due to recent advances in chemical synthesis and imaging techniques, various NIR II probes have been evaluated for tumor luminescence image‐guided cancer therapy and surgery. Furthermore, probes emitting optical, acoustic, or thermal signals under NIR II excitation have also been developed for upconversion luminescence, photoacoustic, and photothermal imaging of tumors. Herein, recent advances in the use of NIR II imaging probes in cancer theranostic applications are summarized along with future perspectives.
Enantioselective Synthesis of Tertiary Allylic Fluorides by Iridium‐Catalyzed Allylic Fluoroalkylation
Authors: Butcher Trevor W. , Hartwig John F. 
Published: August 2018

AbstractFew allylic electrophiles containing two different substituents at a single allyl terminus and none in which one of the two substituents is a heteroatom, have been shown previously to react with iridium catalysts to form substitution products. We report that iridium‐catalysts are uniquely suited to form tertiary allylic fluorides enantioselectively by the addition of a diverse range of carbon‐centered nucleophiles at the fluorine‐containing terminus of 3‐fluoro‐substituted allylic esters. The products contain tertiary stereogenic centers bearing a single fluorine, which are isosteric with common tertiary stereocenters containing a single hydrogen. Computational studies reveal the principal steric interactions influencing the stability of endo and exo π‐allyl intermediates formed from 3,3‐disubstituted allylic electrophiles.
Dendrite‐Free Epitaxial Growth of Lithium Metal during Charging in Li–O2 Batteries
Authors: Xin Xing , Ito Kimihiko , Dutta Arghya , Kubo Yoshimi 
Published: August 2018

AbstractLithium (Li) dendrite formation is one of the major hurdles limiting the development of Li‐metal batteries, including Li‐O2 batteries. Herein, we report the first observation of the dendrite‐free epitaxial growth of a Li metal up to 10‐μm thick during charging (plating) in the LiBr‐LiNO3 dual anion electrolyte under O2 atmosphere. This phenomenon is due to the formation of an ultrathin and homogeneous Li2O‐rich solid‐electrolyte interphase (SEI) layer in the preceding discharge (stripping) process, where the corrosive nature of Br− seems to give rise to remove the original incompact passivation layer and NO3− oxidizes (passivates) the freshly formed Li surface to prevent further reactions with the electrolyte. Such reactions keep the SEI thin (<100 nm) and facilitates the electropolishing effect and gets ready for the epitaxial electroplating of Li in the following charge process.
Antimonen: von der experimentellen Herstellung zur praktischen Anwendung
Authors: Wang Xin , Song Jun , Qu Junle 
Published: August 2018

AbstractVon dem zweidimensionalen Material Antimonen wurde erstmals 2015 berichtet. In der Folge wurden seine einzigartigen Eigenschaften, wie verbesserte Stabilität, hohe Trägermobilität und abstimmbare Bandlücke, theoretisch vorhergesagt. Diese theoretischen Ergebnisse motivieren zur experimentellen Bestätigung und damit zum besseren Verständnis dieses neuen Materials. In letzter Zeit haben die Herstellung von Antimonen und sein Einsatz in verschiedenen Anwendungen große Aufmerksamkeit erregt. Dieser Kurzaufsatz befasst sich sowohl mit der experimentellen Herstellung als auch mit der praktischen Anwendung von Antimonen, einschließlich der Ergebnisse neuerer Forschungsarbeiten über neue Methoden zur Herstellung von Antimonen und möglichen Anwendungen in optoelektronischen Bauteilen, Elektrokatalyse, Energiespeicherung und Krebstherapie. Darüber hinaus liefert er Erkenntnisse, die die Herstellung von Antimonen weiter verbessern könnten, und beschreibt zahlreiche Anwendungsmöglichkeiten.
Intramolecular Aryl Migration of Diaryliodonium Salts: Access to ortho‐Iodo Diaryl Ethers
Authors: Chen Huangguan , Han Jianwei , Wang Limin 
Published: August 2018

AbstractBy using vicinal trifluoromethanesulfonate‐substituted diaryliodonium salts, a novel approach was developed for the synthesis of ortho‐iodo diaryl ethers by intramolecular aryl migration. The reaction conditions are mild with a broad substrate scope. Mechanistic insight suggests a sulfonyl‐directed nucleophilic aromatic substitution pathway. Additionally, the product ortho‐iodo diaryl ethers serve as versatile synthons as demonstrated with several coupling reactions. Furthermore, a useful thyroxine analogue of the 3‐iodo‐l‐thyronine (3‐T1) derivative was synthesized by this aryl migration procedure.
Fabrication of polyaniline/copper sulfide/poly(ethylene terephthalate) thread electrode for flexible fiber‐shaped supercapacitors
Authors: Ba Yuerong , Zhou Shaojie , Jiao Shanshan , Pan Wei 
Published: August 2018

ABSTRACTFiber‐shaped supercapacitors have drawn much attention for their great potential application in future portable and wearable electronics because of their outstanding flexibility, tiny volume, and good deformability. In this work, commercial poly(ethylene terephthalate) (PET) thread was successfully converted into an electrically conductive and electrochemically active thread by introducing copper sulfide (CuS) and polyaniline (PANI) via simple chemical bath deposition and electrochemical deposition. The obtained PANI/CuS/PET electrode combined all the advantages of PET, CuS, and PANI, showing an excellent physical and electrochemical performance. The fiber‐shaped supercapacitor exhibits a high specific capacitance of 29 mF cm−2 (116 mF cm−2 for a single electrode) and good cycling stability with 93.1% retention after 1000 cycles. With the simple preparation method and low‐cost raw materials, this strategy provides a reference for the fabrication of portable/wearable energy storage devices. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46769.
Enhanced electromagnetic interference shielding and mechanical properties of foamed epoxy nanocomposites containing carbon nanofiber treated with silicone surfactant
Authors: Li J. , Zhang G. , Shang Z. , Fan X. , Zhang H. , Zhou L. , Shi X. 
Published: August 2018

ABSTRACTThermosetting epoxy (EP)‐based composites containing various carbon nanofiber (CNF) contents (0–5 wt %) were fabricated using high speed mechanical stirring and surfactant assisting method. Then EP/CNF composites were foamed through a supercritical CO2 (scCO2) foaming method. The cellular morphology of the foamed EP/CNF nanocomposites has been analyzed by scanning electron microscopy (SEM), and the results demonstrated that the CNFs could be served as heterogeneous nucleating agent to increase nucleation sites in nanocomposites, leading to higher cell density and larger cell size. The influences of foaming on conductivity and electromagnetic interference (EMI) shielding effectiveness (SE) were investigated. Due to the introduction of microcellular structure, the conductivity was improved from 9.53 × 10−8 S/cm to 6.75 × 10−6 S/cm and the EMI SE was enhanced from 12.7 to 16.5 dB at the CNF content of 5 wt %. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46833.
Biodegradation of polyurethane‐polyhydroxybutyrate elastomeric composite investigated from morphological and structural viewpoint
Authors: Kupka V. , Benesova P. , Obruca S. , Brtnikova J. , Marova I. , Jancar J. , Vojtova L. 
Published: August 2018

ABSTRACTMorphological, structural, and tensile changes of polyurethane‐poly(3‐hydroxybutyrate) (PU‐PHB) elastomeric composites were evaluated after accelerated test in standard compost media. Size of PHB particles together with their uniform dispersion in the matrix were found to be key parameters for material's resistivity against degradation media. PU‐PHB composite films were synthesized by the “green” solvent free method, where commercially available PHB (PHB‐COM) and PHB produced by bacterium Cupriavidus necator H16 (PHB‐BUT) were both used in the amount of 1, 5, and 10 wt % in composites. Scanning electron microscopy revealed excellent dispersion of PHB‐COM microparticles in the PU matrix resulting in negligible weight losses of the material (max 0.7 wt %). On the contrary, PHB‐BUT particles were agglomerated which promoted partial degradation of the material (max 3.3 wt % loss) manifested by holes on the surface but without severe damage (e.g. fragmentation). Structural analysis confirmed lower crystallinity and less ordered crystalline phase of PHB after the degradation test, particularly in composites made of PHB‐BUT. Moreover, the materials were less stiff after the composting test, but beneficial with higher elongation at break. Such properties are favorable for the use of renewable PHB in the current industrial applications of PU elastomers. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46909.
Synthesis of DOPO‐g‐GPTS modified wood fiber and its effects on the properties of composite phenolic foams
Authors: Ma Y. , Geng X. , Zhang X. , Wang C. , Chu F. 
Published: August 2018

ABSTRACTA novel 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) grafted γ‐glycidoxy propyl trimethoxy silane (GPTS) was synthesized and introduced on the surface of wood fiber (WF). DOPO‐g‐GPTS modified wood fiber (DGMWF) was then used to prepare DGMWF composite phenolic foam (DGMWFCPF). The structures of DOPO‐g‐GPTS were verified by Fourier transform infrared spectroscopy (FT‐IR) and nuclear magnetic resonance (1H‐NMR). The structure of DGMWF was confirmed by FT‐IR. The crystallinity of DGMWF was slightly increased, however, the diffraction peak positions were basically unchanged. In addition, the thermal stability was dramatically improved, and T
i and Tmax increased by 26.6 and 33.2 °C respectively. The carbon residue (800 °C) was reduced by 3.65%. By comparison with pure phenolic foam, the mechanical properties, flame retardancy of DGMWFCPF were increased. No significant changes were observed for the microstructure. By comprehensive analysis, the interfacial compatibility was significantly improved between DGMWF and phenolic resin. The suitable dosage of DGMWF was 4–6%. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46917.
Role of hardener, crosslinker, and pH in bare process of urea–formaldehyde polymerization and forin situencapsulation of linseed oil
Authors: Kurt Çömlekçi G. , Ulutan S. 
Published: August 2018

ABSTRACTIn this study, urea–formaldehyde polymerizations in bare process and forin situencapsulation of linseed oil (LO) have been scrutinized either at pH 3.5 or in inherently developing acidic pH. The solid‐state carbon nuclear magnetic resonance (13C‐NMR) revealed that the hardener and the crosslinker (NH4Cl and resorcinol) resulted in the formation of methylene linkage. The addition of NH4Cl and resorcinol slightly decreased the thermal stability of poly(urea formaldehyde) (PUF) resin. Optical microscopy (OM) images and scanning electron microscopy (SEM) micrographs show that most regular shapes of capsules were obtained when NH4Cl and resorcinol were used in the regular reaction medium. The increment of NH4Cl amount up to 0.124 mol resulted in a 41% decrement of capsule size, whereas increment resorcinol amount up to 0.062 mol increased the size by 14%. The capsule size range was found to be between 60 and 100 μm. The capsules had a hardness of 22–74 MPa and an elasticity of 0.5–1.5 GPa. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019,136, 46947.
The thermal self‐healing properties of phenolic polyurethane derived from polyphenols with different substituent groups
Authors: Cao Shan , Li Shouhai , Li Mei , Xu Lina , Ding Haiyang , Xia Jianling , Zhang Meng , Huang Kun 
Published: August 2018

ABSTRACTPhenolic hydroxyl gave thermal self‐healing ability to phenolic polyurethanes in our previous study. To explore, the feasibility of preparing self‐healing polyurethanes through polyphenols with different substituents. Urushiol, propyl gallate, catechol, and tert‐butylhydroquinone were chosen for preparation of four phenolic polyurethanes, and the different factors at the structures of these polyphenols worked together led the different properties and self‐healing ability. The peak temperatures of these four polyurethanes were determined by DSC in the following order: PTHFTDI‐Urushiol < PTHFTDI‐Catechol < PTHFTDI‐Propyl gallate < PTHFTDI‐Tert‐butylhydroquinone. Variable‐temperature FT‐IR spectra displayed that PTHFTDI‐Propyl gallate with electron‐withdrawing substituent exhibited the lowest decomposition and healing temperatures. Meanwhile, based on TGA analysis, lower decomposition temperature suggested lower thermostability; and PTHFTDI‐Urushiol with electron‐donating substituent exhibited the best thermostability. At the same temperature, the healing abilities of the three polyurethanes were ranked as follows: PTHFTDI‐Catechol < PTHFTDI‐Urushiol < PTHFTDI‐Propyl gallate. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47039.
Electroactive Cu−P‐Coupled Moieties Doped in Hierarchically Porous Carbon as Efficient Catalysts for the Oxygen‐Reduction Reaction
Authors: Ni Yangyang , Qiao Yu , Kong Fantao , Li Ruijing , Zhang Chaoqi , Kong Aiguo , Shan Yongkui 
Published: August 2018

AbstractA porous carbon material that was co‐doped with copper and phosphorus (Cu−P−C) was synthesized by the direct thermal conversion of [(Ph3P)2CuCl2] in the channels of an SBA‐15 template and found to be an impressive Cu‐based electrocatalyst. The prefabricated Cu−Px moieties in the starting [(Ph3P)2CuCl2] were retained during the preparation process of the catalyst. These Cu−Px active sites effectively catalyzed the oxygen‐reduction reaction (ORR). Moreover, the hierarchically porous morphology of the Cu−P−C material, which demonstrated a large specific surface area, allowed for a higher density of the Cu−Px active sites, thereby facilitating mass transfer and further boosting the electrocatalytic activity of the Cu−P−C catalyst. The as‐obtained catalyst exhibited surprising catalytic activity, with a halfwave potential of 0.833 V in alkaline medium, which was comparable to that of the commercial Pt/C‐JM catalyst, and possessed the highest activity among the reported M−P−C catalysts for the ORR.
Robust H2 and H∞ Filter Design for Continuous‐time Uncertain Linear Fractional Transformation Systems via LMI
Authors: Aeinfar Vahid , Askari Javad , Sadeghzadeh Arash 
Published: August 2018

AbstractThis paper considers the problem of robust H2 and H∞ filter design for uncertain continuous‐time linear systems. Linear fractional transformation (LFT) representation is considered for the uncertainty modeling and by definition of large number of slack variables, extra free dimensions are provided to the H2 and H∞ filter design optimization problem, so method presented in this paper expected to be less conservative than the existing methods for the polytopic uncertain systems and its efficiency for filter design is illustrated by means of numerical comparisons with some benchmark examples from the literature.