bluuebunny/crossref_metadata_2025 huggingface dataset:
BuyangHuanwu Decoction attenuates cerebral vasospasm caused by subarachnoid hemorrhage in rats via PI3K/AKT/eNOS axis
Authors: Li Weiping , Wang Ru , Huang Wei , Shen Yanfang , Du Jumei , Tian Ye
Published: July 2022

The ancient Chinese remedy BuyangHuanwu Decoction (BHD) is used to treat qi deficit and blood stasis conditions. This work investigated the effect of BHD on cerebral vasospasm (CVS) caused by subarachnoid hemorrhage (SAH). Rats were randomly assigned into four groups: control group, SAH group, SAH + BHD [13 g/(kg day)] group, and SAH + BHD [26 g/(kg day)] group. The Garcia neurological scoring scale was used to assess neurological dysfunction. Hematoxylin and eosin stains were used to determine the extent of vasospasm by measuring the diameter of the basilar artery. Western blot was used to measure the concentrations of phosphoinositide 3-kinase (PI3K), AKT, and phospho-AKT expression levels. RT-PCR was used to determine PI3K and AKT RNA expressions. Immunohistochemistry and enzyme-linked immunosorbent assay were used to measure levels of endothelial nitric oxide synthase (eNOS) and nitric oxide (NO), respectively, in cerebrospinal fluid. BHD treatment ameliorated CVS and mitigated neurological dysfunction after SAH. Furthermore, the findings suggest that NO concentration was increased through the activation of classical PI3K/AKT signaling and the eNOS pathway. Thus, BHD showed multifaceted roles in preventing damage via decreasing vasospasm and improving neurological impairments caused by CVS after SAH.
Who’s talking? Cognitive semiotics in the (new media) wild
Authors: Hougaard Anders , Oakley Todd , Coulson Seana
Published: July 2022

An axiom of Per Aage Brandt’s approach to conceptual blending, known colloquially as the “Aarhus model”, is that semiosis only makes sense when grounded in communicative interaction. Here we adopt that approach in relation to the reality of current, daily communication which is increasingly mediated by digital audio-visual technology platforms. We pursue this goal via a small set of case studies that explore how this technology changes and challenges social interaction and how participants exploit and adapt cognitive, embodied, technological, and semiotic resources in creating meaningful, collective, virtual spaces of joint social activity. In so doing, we expand the horizon of inquiry and contribute insights that have relevance for the new media ecology. This application of cognitive semiotic analyses of video meetings confronts the nature of “mediation” and its accomplishment, the status of “virtual spaces”, and “social presence.”
Playful recognition: Television comedy and the politics of mediated recognition
Authors: Dahl John Magnus , Nærland Torgeir Uberg
Published: July 2022

This article explores how media content may facilitate processes of recognition through playfulness and comedy. Mediated recognition is typically understood as a matter of respectful and positive representation of subaltern groups and in terms of struggles for visibility and dignity. Yet at the same time, the media address audiences in much less deferential ways that are nonetheless consequential to processes of recognition: by means of playfulness, subversion, and irreverence. This article introduces the concept of ‘playful recognition’ to account for the contradictory ways in which humor can incite recognition. The article empirically illustrates this concept drawing upon a case study of Svart Humor – a comedy show aired in Norway. On the one hand, this article explores an important yet neglected dimension of mediated recognition, on the other, it introduces a recognition perspective to the study of televised comedy.
Sharp sufficient condition for the convergence of greedy expansions with errors in coefficient computation
Authors: Valiullin Artur R. , Valiullin Albert R. , Solodov Alexei P.
Published: July 2022

Generalized approximate weak greedy algorithms (gAWGAs) were introduced by Galatenko and Livshits as a generalization of approximate weak greedy algorithms, which, in turn, generalize weak greedy algorithm and thus pure greedy algorithm. We consider a narrower case of gAWGA in which only a sequence of absolute errors

{

ξ

n

}

n
=
1

∞

{\left\{{\xi }_{n}\right\}}_{n=1}^{\infty }

is nonzero. In this case sufficient condition for a convergence of a gAWGA expansion to an expanded element obtained by Galatenko and Livshits can be written as

∑

n
=
1

∞

ξ

n

2

<
∞

{\sum }_{n=1}^{\infty }{\xi }_{n}^{2}\lt \infty

. In the present article, we relax this condition and show that the convergence is guaranteed for

ξ

n

=
o

1

n

{\xi }_{n}=o\left(\frac{1}{\sqrt{n}}\right)

. This result is sharp because the convergence may fail to hold for

ξ

n

≍

1

n

{\xi }_{n}\hspace{0.33em}\asymp \hspace{0.33em}\frac{1}{\sqrt{n}}

.
Mathematical analysis of a MERS-Cov coronavirus model
Authors: DarAssi Mahmoud H. , Shatnawi Taqi A. M. , Safi Mohammad A.
Published: July 2022

In this study, we have proposed a mathematical model to describe the dynamics of the spread of Middle East Respiratory Syndrome disease. The model consists of six-coupled ordinary differential equations. The existence of the corona-free equilibrium and endemic equilibrium points has been proved. The threshold condition for which the disease will die out or becomes permanent has been computed. That is the corona-free equilibrium point is locally asymptotically stable whenever the reproduction number is less than unity, and it is globally asymptotically stable (GAS) whenever the reproduction number is greater than unity. Moreover, we have proved that the endemic equilibrium point is GAS whenever the reproduction number is greater than unity. The results of the model analysis have been illustrated by numerical simulations.
Artificial lignification of a cellulose microfibril-based hydrogel and resulting effect on tensile properties
Authors: Abe Kentaro , Yonekawa Tsubasa , Natsume Tomoaki
Published: July 2022

This study examined the influence of lignin dehydrogenation polymer (DHP) deposition on the morphology and properties (e.g., tensile property, thickness, and water content) of cellulose microfibril-based gels. Cellulose microfibrils were isolated from wood powder and a stable hydrogel with a layered structure after treatment with 8% (w/v) NaOH were produced. Gels were artificially lignified of by repeated immersion in an ethanol solution containing lignification agents (coniferyl alcohol, horseradish peroxidase, and H2O2) and evaporating the ethanol under vacuum. The use of ethanol allowed DHPs to penetrate the gel, and the deposition of DHPs was achieved by evaporating ethanol under reduced pressure. With increase in the number of lignification cycles to 10, the thickness and water content of the microfibril gels decreased and the ratio of DHP to cellulose, elastic modulus, and tensile strength increased. These results indicate that the elastic modulus of the gels improved not only because of the decrease in water content, but also because of the constrained motion of the microfibril network due to of DHP deposition. The reported artificially lignified cell wall model will help improve the understanding of how lignification contributes to the mechanical strength of plant cell walls.
China in the Bulgarian State Archive: The Visit to the PRC of Stoyan Raynov and the Evergreen People’s Commune for Chinese-Bulgarian Friendship Then and Now
Authors: Hein Evelina
Published: July 2022

The paper presents little-known information about a visit to China in 1959 of Stoyan Raynov—one of the founders of the modern Bulgarian ceramic art. Data from the personal archive of the artist is regarded as part of the bigger picture of the cultural and ideological exchange between Bulgaria and China in the 1950s. Focusing on two sites, visited by Stoyan Raynov during his time in Beijing—the new Beijing Railway Station and the Evergreen People’s Commune for Chinese-Bulgarian friendship, the paper presents the development of the commune into the 21st century, including the visit of Pat Nixon and most recently the birth of the town of Sijiqing—the modern successor of the preceding commune.
Non return to zero line coding with suppressed carrier in FSO transceiver systems under light rain conditions
Authors: Rashed Ahmed Nabih Zaki , Daher Malek G. , Ahammad S. K. Hasane , Montalbo Francis Jesmar P. , Sorathiya Vishal , Asaduzzaman Sayed , Rehana Hasin , Zuhayer Asif
Published: July 2022

This paper aims to simulate performance efficiency of carrier suppressed non return to zero line coding based FSO transceiver systems under light rain conditions with amplification units at 40 Gbps. The max. Q, BER and total optical power are simulated and demonstrated after FSO channel and PIN Photodetector Receiver under light rain weather conditions at maximum reach of 1.2 km at 10 Gbps. As well as the max. Q Factor variations versus max reach variations are clarified after PIN photodetector receiver under light rain weather conditions at 10, 40 Gbps with/without amplification units. Besides the total optical power variations versus max reach variations are assured after FSO channel under light rain weather conditions at 10, 40 Gbps with/without amplification units.
Neonatal admission rate after vaginal breech delivery
Authors: Dathan-Stumpf Anne , Hausmann Christina , Thome Ulrich , Stepan Holger
Published: July 2022

Objectives

The safest mode of delivery for fetuses in breech presentations is still an ongoing debate. The aim of this study was to analyze neonatal admission rates after vaginal breech delivery and compare it to other modes of delivery in order to counsel pregnant women with breech presentation adequately.

Methods

We performed a retrospective monocentric analysis of all deliveries with singleton pregnancies in breech presentation > 36.0 weeks of gestation between 01/2018–12/2019. Short-term neonatal morbidity data was collected for vaginal delivery and primary as well as secondary cesarean sections from breech presentations.

Results

A total of n=41/482 (8.5%) neonates had to be admitted to NICU: vaginal breech delivery n=18/153 (11.8%), primary cesarean section n=9/101 (8.9%, OR 0.73; CI 0.32–1.70; p=0.47), secondary cesarean section n=10/76 (13.2%, OR 1.14; CI 0.50–2.60, p=0.76) and vaginal vertex delivery n=4/152 (2.6%, OR 0.20; CI 0.06–0.51; p=0.005). There was no significant difference in transfer to NICU between all breech position delivery modes. Despite significantly lower pH and 5’ APGAR values after vaginal delivery, neonates delivered by primary cesarean section and NICU admission had to be treated there significantly longer (mean 80.9 vs. 174.0 h). No significant difference in terms of ventilation parameters and infections were found between the vaginal delivery, primary and secondary cesarean section from breech presentation.

Conclusions

Vaginal breech delivery does not result in a higher neonatal admission rate in comparison to primary and secondary section. In contrast, there is a shorter NICU duration in case of neonatal admission after vaginal delivery.
Either/Or Read as Bildungsroman
Authors: Garff Joakim
Published: July 2022

In this article, I investigate Either/Or’s generic affinity with the Bildungsroman. I demonstrate that it both imitates the topological structure (home-homeless-home) of this genre and that it is likewise composed of a number of formation narratives and tropes that mirror the Bildungsroman. This is documented by following the development of an often-overlooked textual figure at the conclusion of the second part of Either/Or and through a reading of “The Seducer’s Diary” as a demonic Bildungsroman with maieutic implications. Finally, I examine the relationship between the Bildungsroman and the Entwicklungsroman [novel of development] with particular attention to Kierkegaard’s late authorship.
Wielding Fear and Trembling Against Religious Violence and Bigotry
Authors: Miles Thomas P.
Published: July 2022

It can be unnerving to read and teach Kierkegaard’s Fear and Trembling in a world plagued by religious violence. The book’s praise of Abraham as the “father of faith” precisely for his willingness to kill his son Isaac, combined with its suggestion that through faith one could “suspend” ethics, seems to provide a defense and even an endorsement of religiously motivated violence. In order to see why this is a misreading of the text, we will need to go beyond arguments based on the book’s pseudonymous or symbolic nature. Only by considering in detail what Fear and Trembling says about Abraham’s faith can we see that, far from endorsing religious violence, the book provides an insightful contrast between true Abrahamic faith and the orientation of hatred, bigotry, ideological blindness behind today’s religious violence.
Repetition and the Art of Writing Novels
Authors: Bravo Nassim , Rojas Fernanda
Published: July 2022

In this paper we wish to analyze how Kierkegaard understood the art of writing novels, that is, as a way to express and develop the life-view of the author. We would like to argue that this notion, presented for the first time in From the Papers of One Still Living (1838), was put into practice in the short novel Repetition (1843), in which Kierkegaard used the biblical story of Job to explain the development of selfhood through the existential category of repetition. According to Kierkegaard, true repetition—which is the central category of the life-view he is trying to convey—helps the individual “recollect” the past correctly so he or she can reconcile with the present and grow into the future.
Revolutionizing the Right to Revolt: Søren Kierkegaard and the Responsibility to Revolt
Authors: Aroosi Jamie
Published: July 2022

The right to revolt is a central concept in political philosophy, denoting when it is justified to replace a corrupt government with a new one. As such, it is a normative concept that would-be revolutionaries should consult in order to determine the justness of a possible revolution. However, this article argues that within Kierkegaard’s thought lies a wholly new conception of revolution that does not look to describe when it might be just to revolt but that instead sees revolution as an act we are sometimes obligated to enact. Consequently, revolt transforms from a right to a responsibility, with important ethical and political consequences.
Toward an Upbuilding Metapsychology: Kierkegaard, Lacan, and the Infinite Movement
Authors: Larios Joe
Published: July 2022

This paper seeks to consider the similarities between Kierkegaard’s life stages and Lacan’s orders to demonstrate that we can understand each description in a structurally similar way to the other. Accordingly, a reading of Kierkegaard is developed that uses his life stages to describe a metapsychology, and a reading of Lacan is developed that shows how his orders can be conceived of progressively. All this leads to a further analysis of the different ways in which each stage relates to repetition and a culmination in which the achievement of faith in Kierkegaard is thought together with the analytic cure in Lacan.
Revisiting the Czech Reception of Kierkegaard in Early 20th Century
Authors: Marek Jakub , Janoušková Anna
Published: July 2022

This article revisits the existing accounts of the early Czech Kierkegaard reception. It argues that Kierkegaard has had a greater reception than previously assumed and that one must take into account the cultural and historical contexts. Two major points are made: first, the earliest Kierkegaard reception was closely related to the Czech national political struggles and Kierkegaard was used as a political argument supporting the need for a Czech national reformed Church. Second, we provide evidence for a surprising politicized Catholic reception of Kierkegaard: Kierkegaard’s critique of the Danish Lutheran Church was appropriated to attack Protestantism and support the Roman Catholic Church.
Ultra-broadband on-chip beam focusing enabled by GRIN metalens on silicon-on-insulator platform
Authors: Shen Jian , Zhang Yong , Dong Yihang , Xu Zihan , Xu Jian , Quan Xueling , Zou Xihua , Su Yikai
Published: July 2022

Metalens has emerged as an important optical block in free-space optical systems, which shows excellent performance. Even the metalens based on gradient index (GRIN) profiles can be implemented for on-chip beam focusing behavior. However, for most previous schemes, the GRIN metalenses can only achieve on-chip beam focusing behavior in one dimension, which limits their applications in low-loss waveguide interconnecting or fiber-to-chip coupling. In this paper, an on-chip half Maxwell’s fisheye lens based on GRIN profiles with subwavelength features, integrated with silicon waveguides, is experimentally demonstrated. Benefitting from the index distribution and beam focusing characteristics of the half Maxwell’s fisheye lens, an on-chip beam transforming can be achieved for transverse electric (TE) fundamental mode in two waveguides with different heights and widths. The simulated 1 dB bandwidth can reach 1100 nm, which exhibits great prospects in integrated photonic circuits. The measured insertion loss of an on-chip 5.4 μm-length lens is less than 1 dB to connect a 220 nm-height, 8 μm-wide waveguide, and a 60 nm-height, 0.5 μm-wide waveguide in the wavelength range of 1280–1620 nm.
The crystal structure of diaqua-bis(pyrazolo[1,5-a]pyrimidine-3-carboxylato-κ2N,O)nickel(II) dihydrate, C14H16N6O8Ni
Authors: Hong Deng-Feng , Li Meng-Fei , Chu Tian-Tian
Published: July 2022

C14H16N6O8Ni, monoclinic, P21/n (no. 14), a = 6.3975(3) Å, b = 11.6712(5) Å, c = 11.7199(5) Å, β = 96.677(4)°, V = 869.15(7) Å3, Z = 2, R

gt
(F) = 0.0340, wR

ref
(F
2) = 0.0789, T = 291 K.
Study in the parameter influence on underwater acoustic radiation characteristics of cylindrical shells
Authors: Tang Yuhang , Jia Fuxin , Jia Di , Wang Xueren , liu Yong
Published: July 2022

At present, the cylindrical shell was regarded as the dominating structure in underwater vehicles, which raised the crucial significance to research underwater vehicles’ vibration and acoustic radiation features. In this study, the analytical expression of vibration–acoustic theory had been given according to the derivation with the vibration–acoustic theory of ribless cylindrical shell structure. Meanwhile, the effects of key parameters on vibration–acoustic characteristics are investigated including modulus, density, thickness, loss factor, etc. The research shows that the stiffness and damping of the shell directly affected the vibration of the structure. Furthermore, the performance of vibration attenuation and noise reduction of the shell had been enhanced by increasing the modulus, thickness, and loss factor in materials.
Comparison of properties of colorless and transparent polyimide films using various diamine monomers
Authors: Jeon Hara , Kwac Lee Ku , Kim Hong Gun , Chang Jin-Hae
Published: July 2022

Six different types of polyamic acids were synthesized by reacting 1,2,4,5-cyclohexanetetracarboxylic dianhydride with the diamine monomers 3,4-oxydianiline, 1,3-bis(3-aminopheno-xy)benzene, 1,4-bis(4-amino-phenoxy)benzene, m-bis[4-(3-aminophenoxy)phenyl]sulfone, p-bis[4-(4-aminophenoxy)-phenyl]sulfone, and 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane. Thereafter, polyimide (PI) films were prepared via various heat treatment processes. The diamine monomers used in this study for the synthesis of colorless and transparent PI (CPI) were characterized by a bent meta-structure or a para-linear chain containing ether (–O–) bonds. In addition, some monomers included fluorine (–CF3) substituents and sulfone (–SO2–) groups. Furthermore, the thermal and mechanical properties, optical transparency, and solubility of the CPI films with six different diamine monomer structures were investigated. The correlation between CPI film properties and related monomer structures was specifically emphasized.
Care-Labore als organisationale Heterotopien. Reflexionen über Spiritualität und Transferlernen in Sorgeorganisationen
Authors: Mertens Johannes
Published: July 2022

Der Beitrag schildert aus einer genealogischen Perspektive die Initiierung, Moderation und ethnografische Begleitung eines partizipativen Transferforschungsprozesses. Fußend auf der Basis von fortlaufenden theorieorientierten Kodierungen aus 72 „Care-Labor“-Memos wird rekonstruiert, wie sich sukzessive in einer Initial-, Entwicklungs- und Implementierungsphase anhand der leitenden Fragestellung das spätere Produkt der „Care-Labore“ entwickelte.
Museales Performance-Measurement in Krisenzeiten
Authors: Hildebrand Lea , Paetz Friederike , Küblböck Stefan
Published: July 2022

Museen stellen vielfach Ankerattraktionen im Leistungsprofil einer Destination dar. Der zunehmende Wettbewerb zwingt viele Museen zur stetigen Neuerfindung des eigenen Leistungsangebots, weshalb die Arbeit mit Sonderausstellungen in den letzten Jahren einen regelrechten Boom erlebt hat. Die über Sonderausstellungen generierten Besuchszahlen sind aus zwei Perspektiven wichtig: Die per Definition nicht profitorientierten Einrichtungen können durch den Verkauf von Tickets wichtige Einnahmen für ihre Aufgaben in Forschung, Bildung und Bewahrung erzielen, und die zumeist staatlichen Geldgeber begrüßen den Besucherzuspruch, wenn es um die Bewertung der erbrachten Leistung und folglich auch um den langfristigen Erhalt geht. Doch die Schließungen von Museen in Zeiten der Covid-19-Pandemie setzten die Besuchszahl als Gradmesser außer Kraft. Auch bei der Planung, Umsetzung und nicht zuletzt bei der grundlegenden Einordnung von Sonderausstellungen stellte die Pandemie eine wesentliche Zäsur dar. In der vorliegenden Studie wird erstmalig die Bedeutung von Sonderausstellungen in der Bewertung musealer Arbeit insbesondere während Covid-19 systematisch betrachtet. Hierzu wird das populäre Performance-Measurement-Modell von Barrio-Tellado und Herrero-Prieto (2019) erweitert und die Krisenbeständigkeit von Sonderausstellungen und Besuchszahlen als prägende Bestandteile der Museumsevaluation im Kontext der Covid-19-Pandemie auf Basis qualitativer Primärforschung analysiert.
ASPECTOS CONSTRUTIVOS E HIDRÁULICO DO TELHADO VERDE: UM IMPACTO NO TEMPO DE CONCENTRAÇÃO
Authors: Teixeira Luciana , Barreto Bruno B.
Published: July 2022

A explosão demográfica observada nas últimas décadas potencializou os efeitos da urbanização desordenada. Devido ao acentuado crescimento e o consequente não planejamento da ocupação urbana, foi possível perceber uma redução significativa das áreas verdes e permeáveis, principalmente nos grandes centros, provocando impactos ambientais extremamente negativos. Dentre esses impactos há o aumento da frequência de cheias causadas até mesmo por chuvas de média a moderada intensidade. Como alternativa para minimização do impacto de cheias, o presente trabalho objetivou realizar um estudo comparativo hidráulico entre um telhado convencional e um telhado com cobertura verde, o telhado verde. Será analisado empiricamente a intensidade da chuva e o volume de água retido e escoado. Dessa maneira pode-se perceber que o telhado verde surge como uma importante técnica sustentável capaz de mitigar o impacto inicial das cheias, permitindo tempo para a ação dos organismos públicos atuantes em gestão de crise.
Optical properties of ZnO nanorods and ZnO/CdZnS thin films
Authors:   College of Pharmacy, Al-Zahraa University for Women, Abdulameer Z. Th. , Alrubaie A. J. ,   Department of Medical Instrumentation Techniques Engineering, Al-Mustaqbal University College, Babylon, Iraq, Alshamarti H. A. ,   Department of Physics, Kufa University, faculty of science, Najaf, Iraq, Talib S. H. ,   Department of Medical Instrumentation Techniques Engineering, Al-Mustaqbal University College, Babylon, Iraq, Mohammed J. H. ,   Faculty of Phrmacy, University of Kerbala, Jameel H. A. ,   Department of Medical Instrumentation Techniques Engineering, Al-Mustaqbal University College, Babylon, Iraq, Zabibah R. S. ,   Medical Laboratory Technology Department, College of Medical Technology, the Islamic University, Najaf, Iraq, Mohammed K. A. ,   Department of Medical Physics, Hilla University College, Babylon, Iraq
Published: July 2022

"Zinc oxide nanorods (ZnO NRs.) film prepared by hydrothermal method and zinc oxide film chemically coated with a trinary semiconductor (CdZnS) thin layer was investigated in this work. Optical properties include transmission, absorption spectra and energy band gaps have been tested for prepared thin films. it was observed that the absorption edge of the films after coating shifted towards higher wavelengths. Also there is a remarkable reduction in energy gap for ZnO/CdZnS film with compare to ZnO NRs. Film. The energy gap of ZnO NRs was 3.2 eV and 2.5 eV for ZnO/CdZnS film. "
Preparation and degradation properties of AgBiS2/BiOI composite photocatalytic materials with high catalytic activity
Authors:   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Zhuang Y. L. , Zhang X. H. ,   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Dong L. M. ,   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Li Y. ,   bGuangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin, China, Li D. ,   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Dong J. H. ,   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Liu Z. W. ,   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Tian S. ,   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Wang L. M. ,   Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China, Dai Y. ,   Department of Industry Engineering，Harbin Institute of Technology，Harbin 150001，China
Published: July 2022

An AgBiS2/BiOI composites with different proportions were prepared by precipitation method, and their catalytic activity was studied by degrading RhB (100 mg/L) under simulated light conditions. The results showed that the photocatalytic activity of AgBiS2/BiOI composite was the best when the doping amount of AgBiS2 was 4 wt. % (the degradation rate was about 94%). Compared with pure BiOI, the degradation rate of RhB increased by 24%. After 5 cycles of experiments, the degradation rate of the material can still reach 94%, indicating that the AgBiS2/BiOI composite has good stability
A wearable flexible graphene biosensor for environmental toxicity monitoring
Authors:   a Laboratory of Electronic Materials Studies for Medical Applications (LEMEAMED), Faculty of Technology Sciences, Frères MENTOURI Constantine University (FST-UMC), Bouherour M. , Aouabdia N. ,   a Laboratory of Electronic Materials Studies for Medical Applications (LEMEAMED), Faculty of Technology Sciences, Frères MENTOURI Constantine University (FST-UMC), Lamri Zeggar M. ,   a Laboratory of Electronic Materials Studies for Medical Applications (LEMEAMED), Faculty of Technology Sciences, Frères MENTOURI Constantine University (FST-UMC), Touidjen N. H. ,   a Laboratory of Electronic Materials Studies for Medical Applications (LEMEAMED), Faculty of Technology Sciences, Frères MENTOURI Constantine University (FST-UMC), Rouabah S. ,   a Laboratory of Electronic Materials Studies for Medical Applications (LEMEAMED), Faculty of Technology Sciences, Frères MENTOURI Constantine University (FST-UMC)
Published: July 2022

"Toxic gases are responsible for the loss of many human lives around the world, which is increasing every year. Toxicity can have various biological aspects on the human body. The exposure to its gases leads to harmful consequences for the organism, which leads to metabolic reactions and even death. For this purpose, the initial step is to detect these gases with miniature flexible structures and solid progressed estimation methods using a simulation software tool. The studied sensor is based on the frequency characterization of an RF Planar Resonant Structure, in which the active element is a patch of radiating graphene printed on a polyimide film (Kapton). The objective of this work is to use our Graphene-Kapton sensor for non-invasive testing applications. In our case, the device is tested to detect and recognize several dangerous and toxic gases such as Fluorine azide (F2N), Hydrogen Iodide (HI), Nitrogen (N2), Methane (CH4), and Carbon monoxide (CO). The simulation results indicate that the Graphene-Kapton flexible sensor exhibits an important sensing performance. The sensor is able to detect all the tested gases with a good sensitivity depending on each gas. As well as, the sensor shows a high sensitivity (0.1± 0.01)* 106 [ppm]-1 (0.1 [ppt]-1) of methane (CH4) gas with detection limit of (9±0.1) *10-6 ppm (9 ppt). "
A study of structural and chemical properties of Ni1-xZnxFe2O4 ferrite powder prepared by co-precipitation method
Authors:   Department of Physics, College of Science, University of Diyala, Diyala, Iraq, Ahmed R. R. , Mubarak T. H. ,   Department of Physics, College of Science, University of Diyala, Diyala, Iraq, Mohamed I. H. ,   Department of Biology, College of Science, University of Diyala, Diyala, Iraq
Published: July 2022

Nickel zinc nanoferrites (Ni1-xZnxFe2O4 with x ranging from 0.3 to 0.7 and 0.9) were employed in this study. Chemical co-precipitation was used to synthesize nanoparticles, X-ray diffraction, fourier transform infrared spectroscopy, field emission scanning electron microscopy analysis (FESEM), and the vibration sample magnetometer were used to determine the structure, size, morphology, and magnetic properties of nanostructures (VSM). X-ray diffraction was used to identify the crystalline phases, and all samples have cubic spinel ferrites. To evaluate particle sizes using Scherrer's formula. average crystallite sizes were in the range of (13-19)nm and FTIR spectroscopy data for respective sites were examined in the range of 200–4000 cm-1 . Between 320 and 1000 cm-1 , the formation of ferrite phase was confirmed, indicating the sample's ferrite nature. Tetrahedral complexes were assigned to the higher frequency band ν1, while octahedral complexes were assigned to the lower frequency band ν2. The M-H curve shows that Ms rises from 1.96-23.7 (emu/g).
Simulation of radiation effects on In0.52Al0.48As and In0.53Ga0.47As by low energy He ion
Authors:   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China, Mei H. Y. , Zhao S. H. ,   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China, Wu Y. Z. ,   School of Information Engineering, Shenyang University, Shenyang 110044, China, Zhang P. ,   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China, Wu H. T. ,   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China, Yao R. X. ,   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China, Zheng X. Y. ,   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China, Wen H. ,   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China, Sun S. X. ,   Henan Provincial Key Laboratory of Smart Lighting, School of Information Engineering, Huanghuai University, Zhumadian 463000, China
Published: July 2022

"In this article, influence of He ions irradiation on In0.52Al0.48As and In0.53Ga0.47As materials with the energies ranging from 50 to 200 keV at normal incidence, including the distributions of the He ions, ionizing energy loss, vacancy, and backscattering ion number, is studied through the simulation. The calculated results show that the peak position of He ion distribution moves to the deeper depth with increasing incident energy and the distribution curve conforms to Bragg distribution. The distribution of the ionizing energy loss induced by He ions is almost constant first and then sharply drops with increasing energy induced by recoil atoms conforms to Bragg distribution. The numbers of vacancies increase with increasing energy and the As vacancy is the prominent vacancy for these two materials. The number of phonons induced by recoil atoms is much higher than that induced by the He ions. The total numbers of the backscattering for the In0.52Al0.48As and In0.53Ga0.47As all decline as the energy is increases and the value for InGaAs is always higher than that the He ions. The higher numbers of backscattering ions are obtained for InAlAs. "
Effect of interface properties on the performance of CGS heterojunction solar cells
Authors:   University Tahri Mohammed Béchar, Algeria, Laboratory of semiconductor devices physics, Energetic Department, P.O.Box 417, Béchar, Algeria, Mebarki R. , Moughli H. ,   University Tahri Mohammed Béchar, Algeria, Laboratory of semiconductor devices physics, Energetic Department, P.O.Box 417, Béchar, Algeria, Merabti A. ,   University Tahri Mohammed Béchar, Algeria, Laboratory of semiconductor devices physics, Energetic Department, P.O.Box 417, Béchar, Algeria
Published: July 2022

"In the tandem solar cells based on CGS (ZnO/CdS/CuGaSe2) single solar cells, we have the interface state density of defects between CdS buffer layer and CuGaSe2 absorber layer witch causes undesirable carriers recombination, Gaussian distribution model describe this interfacial recombination witch depending to interface state density. In this work we simulated the effect of the interface state density in the buffer and absorber layer of ZnO/CdS/CuGaSe2 solar cells that is variated from 1014 to 1018 cm-3 on I-V characteristics and efficiency. We used the wxAMPS simulator to get the results."
Study and modeling of photonic crystal fibers
Authors:   University Tahri Mohammed Béchar, Algeria, Laboratory of semiconductor devices physics, Energetic Department, P.O.Box 417, Béchar, Algeria, Moughli H. , Mouloudi Y . ,   University Tahri Mohammed Béchar, Algeria, Laboratory of semiconductor devices physics, Energetic Department, P.O.Box 417, Béchar, Algeria, Merabti A. ,   University Tahri Mohammed Béchar, Algeria, Laboratory of semiconductor devices physics, Energetic Department, P.O.Box 417, Béchar, Algeria
Published: July 2022

"Optical fiber is a light guide which today constitutes the preferred medium for the transport of information. But, in order to meet the increasing needs generated by the development of the Internet in particular, it was necessary to always improve the propagation characteristics in the fibers. A new generation of fibers has been designed with the aim of obtaining lower losses and better performance than classical fibers. This work presents a design of hexagonal photonic crystal fiber (PCF) geometry for analyzing different optical properties with respect to wavelength ranging. This geometry has been used for analyzing effective refractive index, dispersion, effective mode area, nonlinear coefficient and birefringence. Silica glass is chosen as background material and the cladding region is made of air hole layers. This work is based on the modeling and analysis of the propagation characteristics of waves in a photonic crystal fiber."
KEKAYAAN JENIS TANAMAN BERPOTENSI ATSIRI DI DESA NGESREPBALONG, KABUPATEN KENDAL
Authors: Utami Nur Rahayu , Rahayuningsih Margareta , Alighiri Dante , Nugraha Satya Budi , Yuwono Setyo , Arifin MS
Published: July 2022

Tanaman atsiri adalah salah satu keanekaragaman hayati yang saat ini mengalami peningkatan permintaan pasar seiring merebaknya wabah pandemi Covid 19. Desa Ngesrepbalong memiliki potensi keanekaragaman jenis tumbuhan yang banyak dimanfaatkan masyarakat. Penelitian atau kajian tentang tanaman atsiri yang umum di pasaran telah banyak dilakukan, namun terbatas untuk jenis-jenis tumbuhan liar. Data sebaran jenis tanaman atsiri di Desa Ngesrepbalong belum pernah dikaji secara ilmiah. Oleh karena itu, analisis kekayaan jenis tanaman berpotensi atsiri di Desa Ngesrepbalong perlu dilakukan. Kegiatan eksplorasi tanaman berpotensi atsiri di Desa Ngesrepbalong dilakukan dengan menggunakan data primer dan data sekunder. Data primer didapatkan dengan melakukan eksplorasi di lapangan dan purposif sampling, sementara data sekunder didapatkan melalui wawancara masyarakat di Desa Ngesrepbalong. Tumbuhan yang ditemukan kemudian didokumentasi, dicatat, dilabel, diidentifikasi, dan diambil titik koordinatnya. Hasil analisis kekayaan jenis tanaman berpotensi atsiri menunjukkan total tercatat sebanyak 41 jenis teridentifikasi (304 individu) yang termasuk dalam 24 famili dan 17 ordo) di Desa Ngesrepbalong.
EFEK DAYA PLASMA TERHADAP SIFAT FOTOLUMINESEN FILM TIPIS ZnO DOPING Al
Authors: Astuti Budi , Sugianto Sugianto , Maftuchah Ida , Firmahaya Nur Arina , Marwoto Putut , Nurhamid Nurhamid , Darsono Teguh , Aryanto Didik , Isnaeni Isnaeni
Published: July 2022

Film tipis ZnO doping Al (ZnO:Al) dideposisi pada substrat corning glass menggunakan metode DC magnetron sputtering. Proses deposisi film tipis ZnO:Al dijaga konstan pada tekanan Argon, suhu deposisi, dan waktu deposisi masing-masing 500 mTorr, 400 ℃, dan 2 jam. Selanjutnya, proses deposisi film tipis ZnO:Al menggunakan variasi daya plasma yaitu 33, 43, dan 50 watt. Karakterisasi sifat optik film tipis ZnO:Al menggunakan Photoluminescence spektroskopi. Daya plasma yang berbeda dapat mempengaruhi energi ion dan momentum tumbukannya. Perbedaan daya plasma tersebut memiliki efek terhadap kualitas film tipis yang dihasilkan, dimana peningkatan daya plasma menyebabkan kualitas film tipis yang dihasilkan semakin baik.
PENGARUH KOMPOSISI BAHAN TERHADAP MECHANICAL PROPERTIES PADA CRUCIBLE UNTUK PELEBURAN ALUMINIUM
Authors: Rusiyanto Rusiyanto , Fitriyana D.F. , Widodo R.D. , Widayat W. , Yudiono Heri , Musyono Ari Dwi Nur , Firmansyah Hendrix , Sudiyono Sudiyono , Rengga Wara Dyah Pita , Ilham M.S. , Casminto Casminto , Sanubari I.
Published: July 2022

Crucible terbuat dari bahan keramik atau logam yang digunakan untuk meleburkan logam atau bahan lainnya pada suhu yang sangat tinggi sebelum dituangkan pada suatu cetakan. Pada buku ini akan membahas tentang pengaruh komposisi bahan penyusun crucible terhadap sifat mekanik yang dihasilkan. Crucible dibuat dengan mencampurkan semen tahan api, limbah evaporation boats, pasir silika, grafit dan kaolin dengan komposisi tertentu. Proses pencampuran bahan dilakukan selama 60 menit dengan penambahan air sebanyak 25% dari total berat material. Proses kompaksi dilakukan dengan tekanan sebesar 80 kg/cm2. Spesimen yang terbentuk didinginkan pada suhu 30°C selama 7 hari sebelum di sintering. Proses sintering dilakukan pada suhu 1200°C selama 2 jam menggunakan furnace untuk menghasilkan produk akhir. Proses karakterisasi menggunakan pengujian impact sesuai dengan ASTM D256 dan pegujian makrografi. Hasil pengujian menunjukan spesimen F memiliki kekuatan impact yang lebih besar dibandingkan spesimen yang lain yaitu sebesar 0,018 J/mm2. Hasil pengujian makrografi pada semua spesimen menunjukan patahan brittle yang ditandai dengan patahan datar.
Integrating Reading as Evidence to Enhance Argumentation in Scientific Reading-based Inquiry: A Design-based Research in Biology Classroom
Authors: Probosari R. M. , Sajidan S. , Suranto S. , Prayitno B. A.
Published: July 2022

This study aims to design a Scientific Reading-based Inquiry (SRbI) model that supports argumentation skills development. The assessment of these skills refers to the Toulmin Argument Pattern (TAP), and the participants were Biology Education students in a state university. Furthermore, the Design-based Research (DBR) approach was adopted by combining exploratory studies, trials, and case studies as part of an iterative process. The intervention was formed based on design principles derived from literature review and findings from exploratory studies. Also, observations were made during the trial and intervention process. Data in assessments and observations of written and oral arguments were collected and descriptively analyzed. The study, in three iterations, produced a framework as the basis for the SRbI learning model, with five phases: Reading Orientation, Recapturing, Processing, Communicating, and Reviewing. Therefore, the application of this learning model had a significant impact on the development of students’ argumentation skills.
Applying STEM Engineering Design Process through Designing and Making of Electrostatic Painting Equipment in Two Rural Schools in Vietnam
Authors: Duong X. Q. , Nguyen N. H. , Nguyen M. T. , Thao-Do T. P.
Published: July 2022

STEM education has been emphasized in Vietnam’s new National Education Curriculum to develop students’ capacity and prepare for the modern labor market. However, there are concerns that STEM education may not be suitable for low-budget or rural schools, where the conditions are insufficient. This research aims to investigate the possibility and efficiency of applying STEM education, focused on the Engineering Design Process (EDP), in rural high schools in Vietnam. This paper reported the results of two rounds of research on 96 grade 11 rural students who participated in a STEM project of designing and making electrostatic painting equipment using the EDP as the alignment. The students were from two rural schools of Thap Muoi district, Dong Thap province in Mekong Delta, where education was considered lower than the general standard of Vietnam. Data was collected using qualitative research methods, including teacher’s observation and notes for the whole process, students’ portfolios (worksheets, research diary, diagram and pictures, video clips, messages, and notes), and informal interviews. Triangulations were applied during data collection and analysis. The results showed promising where the students actively engaged in all the stages of the EDP and could accomplish all the requirements. Moreover, compared to round 1, round 2 showed slightly better indicators which means the experience of the teacher is improved the students’ achievement. Therefore, it can be concluded that STEM EDP can be applied with encouraging results even in rural schools.
ICT Thematic Science Teaching Material with 5E Learning Cycle Model to Develop Students' 21st-Century Skills
Authors: Asrizal A. , Yurnetti Y. , Usman E. A.
Published: July 2022

Twenty-first-century learning should develop students’ 21st-century skills, including aspects of knowledge, attitudes, character, and 4C skills. These students’ skills need to be widely developed in science learning to handle the challenges of this century. The preliminary study results indicate that integrating learning materials in science learning and students’ 4C skills were low. Thematic science teaching materials integrated the 5E learning cycle model can solve the problem. The study aims to investigate the effect of thematic science teaching material integrated with the 5E on various aspects of students’ 21st-century skills, including knowledge, attitudes, and 4C skills. The research method is quasi-experimental, and the design is a randomized control group posttest-only, which is suitable for determining the effect of a treatment on a dependent variable. The knowledge aspect is measured using a written test sheet in multiple-choice, the attitude aspect using an observation sheet, and the 4C skills aspect using a performance assessment sheet. Data were analyzed using a comparison test for the two sample groups and the Mann-Whitney U test. The data analysis state that the application of thematic science learning material integrated with the 5E has a positive effect on students’ 21st-century skills, including aspects of knowledge, attitudes, and 4C skills: critical thinking skills, creative thinking skills, and communication skills. The study concludes that applying thematic science learning material integrated with the 5E learning cycle model effectively develops the three aspects of students’ 21st-century skills.
Revised Bloom Taxonomy-Oriented Learning Activities to Develop Scientific Literacy and Creative Thinking Skills
Authors: Pujawan I. G. N. , Rediani N. N. , Antara I. G. W. S. , Putri N. N. C. A. , Bayu G. W.
Published: July 2022

Students’ literacy and creative thinking skills in the learning process are not optimal. Students only master science concepts without communicating and solving problems in everyday life. It happens because the learning activities applied by the teacher are less innovative and varied. This study aims to analyze the impact of revised Bloom’s Taxonomy-oriented learning activities on creative thinking skills and scientific literacy. The study had quasi-experimental in a pretest-posttest control group design. The sample of this study was 60 students; 30 students in the experimental class and 30 students in the control class. Data collection methods used were tests and questionnaires. The instrument used was a test instrument in description of 10 questions to test critical thinking skills, a questionnaire instrument consisting of 30 statements, and a questionnaire instrument to measure scientific literacy skills. Data analysis methods used were quantitative descriptive and inferential statistical. The Manova analysis obtained 0.00 0.05. Based on the analysis results, effective learning activities develop creative thinking skills and scientific literacy, either partially or simultaneously. Even though it affects creative thinking skills and scientific literacy, the strongly influenced variable is creative thinking skill, which is indicated by a significant increase in the mean value. Thus, learning activities based on Bloom’s Taxonomy become learning recommendations to develop creative thinking skills and scientific literacy.