bluuebunny/crossref_metadata_2025 huggingface dataset:
Pets podem ter COVID-19: Incidência e soroprevalência em animais sintomáticos atendidos em clínica particular
Authors: Guimarães Adriana Gibara , Lee Daniel , Meira-Santos Patrícia , Bezerra Taynar , Pinto Borges Lysandro
Published: July 2022

A presença do SARS-CoV-2 e os anticorpos produzidos pela resposta imune contra este vírus em animais tem sido alvo de diversos estudos recentes. Estes achados são de suma importância para a melhor compreensão da cadeia de transmissão da COVID-19 e da participação dos animais de estimação neste processo. Neste estudo, animais domésticos com sintomas gripais e atendidos em uma clínica veterinária particular do Estado de Sergipe foram avaliados quanto à presença do SARS-CoV-2 e dos anticorpos IgM e IgG produzidos contra este vírus. Além disso, investigou-se a presença de antígenos fecais (parvovírus e coronavírus animal). A maioria dos animais avaliados (93,5%) apresentaram antígenos detectáveis para o SARS-CoV-2 e reagentes para o anticorpo IgM, havendo associação significativa entre estes dois parâmetros (****< 0,0001; com razão de chance de 1573, IC 95% = 28,36 a 87243). Não foram observadas diferenças significativas entre os níveis de IgM entre cães e gatos. Além disso, não detectamos a presença de IgG contra o SARS-CoV-2 e coinfecções por coronavírus animal ou parvovírus. Este estudo reforça a hipótese de que os animais domésticos são susceptíveis a infeção pelo novo coronavírus, ressaltando a importância do cuidado em relação a convivência entre Pets e humanos e a possível cadeia de contato entre pets e humanos, ainda não evidenciada.
Comprehensive management of late mediastinitis involving an aortic Dacron graft
Authors: Affronti Alessandro
Published: July 2022

We present a case of late mediastinitis following surgery for type A aortic dissection. After a thorough preoperative workup, the patient underwent a redo sternotomy, removal of all prosthetic material, and replacement of the aortic root with a homograft. The patient required venoarterial extracorporeal membrane oxygenation and delayed sternal closure for post-postoperative biventricular failure as well as prolonged antibiotic treatment. We present our institutional multidisciplinary approach for the management of such complex cases.
Strategies to minimise the current disadvantages experienced by women in faecal immunochemical test-based colorectal cancer screening
Authors: Clark Gavin R.C. , Steele Robert J.C. , Fraser Callum G.
Published: July 2022

Currently, women are disadvantaged compared to men in colorectal cancer (CRC) screening, particularly in programmes that use faecal immunochemical tests for haemoglobin (FIT) followed by colonoscopy. Although there is no single cause for all the known disadvantages, many can be attributed to the ubiquitous finding that women have lower faecal haemoglobin concentrations (f-Hb) than men; there are many plausible reasons for this. Generally, a single f-Hb threshold is used in CRC screening programmes, leading to lower positivity for women than men, which causes poorer outcomes for women, including lower CRC detection rate, higher interval cancer (IC) proportion, and higher CRC mortality. Many of the now widely advocated risk scoring strategies do include factors taking account of sex, but these have not been extensively piloted or introduced. Using different f-Hb thresholds for the sexes seems advantageous, but there are difficulties, including deciding which characteristic should be selected to achieve equivalency, for example, positivity, IC proportions, or specificity. Moreover, additional colonoscopy resources, often constrained, would be required. Governments and their agencies should be encouraged to prioritise the allocation of resources to put simple strategies into practice, such as different f-Hb thresholds to create equal positivity in both sexes.
Multiscale Sub-grid Correction Method for Time-Harmonic High-Frequency Elastodynamics with Wave Number Explicit Bounds
Authors: Brown Donald L. , Gallistl Dietmar
Published: July 2022

The simulation of the elastodynamics equations at high frequency suffers from the well-known pollution effect.
We present a Petrov–Galerkin multiscale sub-grid correction method that remains pollution-free in natural resolution and oversampling regimes.
This is accomplished by generating corrections to coarse-grid spaces with supports determined by oversampling lengths related to the

log
⁡

(
k
)

\log(k)

, 𝑘 being the wave number.
Key to this method are polynomial-in-𝑘 bounds for stability constants and related inf-sup constants.
To this end, we establish polynomial-in-𝑘 bounds for the elastodynamics stability constants in general Lipschitz domains with radiation boundary conditions in

R
3

\mathbb{R}^{3}

.
Previous methods relied on variational techniques, Rellich identities, and geometric constraints.
In the context of elastodynamics, these suffer from the need to hypothesize a Korn’s inequality on the boundary.
The methods in this work are based on boundary integral operators and estimation of Green’s function’s derivatives dependence on 𝑘 and do not require this extra hypothesis.
We also implemented numerical examples in two and three dimensions to show the method eliminates pollution in the natural resolution and oversampling regimes, as well as performs well when compared to standard Lagrange finite elements.
Enunciation – some psychosemiotic reflections
Authors: Rosenbaum Bent
Published: July 2022

The concept of ‘enunciation’ was developed very early in Per Aage Brandt’s work. Giving Saussure’s semiology a prominent position, Brandt’s enunciation model became the basis for further development of a psychosemiotic model that was used in the analysis of persons in traumatized and psychotic states of mind. This paper describes this development and its claim that the enunciative, spoken words, statements or narrations, in which the enunciation is more or less silently embedded, is anchored or embedded in internal communicative components, which in themselves can be said to be enunciatively structured. These components will be described in detail as well as their characteristics encompassing the imaginary and symbolic dimensions of language.
The semiotic scoubidou – a short intellectual biography of Per Aage Brandt
Authors: Bundgaard Peer F.
Published: July 2022

This text is a short intellectual biography written in memory of Per Aage Brandt (1944–2021). I present some of the main tenets of his scientific endeavor, artistic practice, and scholarly entrepreneurship.
Germand Gladensvend and the monster
Authors: Jørgensen Henrik
Published: July 2022

The present analysis discusses the narratological structures of the Danish folk ballad on ‘Germand Gladensvend’ (‘Happy Germand’, DgF 33). The text is preserved in six different manuscript versions, all of them written before appr. 1630, and in a printed version from 1591. Although the story is strongly related in all of them, including stanzas that are identical almost word for word, the different versions nevertheless have rather different narratological structures, depending on the strong variation between the conclusions of the different versions. In order to make these differences clear, the analysis uses classical narratological concepts, like movements of objects of value and the semiotic square. The narrative structures in the extant versions of the Danish popular ballad “Germand Gladensvend” (DgF 33).
Tom Thomson’s Islands, Canoe Lake, 1916: a rock as the head of a bear
Authors: Kennedy John M.
Published: July 2022

Tom Thomson is a doyen of Canadian art. Here, I argue one of his well-known pictures contains a hidden figure. In Thomson’s Islands, Canoe Lake, 1916, a blue-gray picture primitive richly affords a rock and a bear, a long-overlooked ambiguity, one that Thomson did not tell us he intended. Its picture primitives are contours and patches. They offer a limited set of scene primitives. A likelihood ratio of less than 1 in 100 supports the contention that the bear is a hidden figure.
From mediated to datafied recognition: The role of social media news feeds
Authors: Campanella Bruno
Published: July 2022

This article conducts a brief review of works dealing with recognition processes in media environments, with a special focus on social media platforms. It argues that efforts to analyze dynamics of recognition in datafied spaces should take into consideration the working logics of such platforms, which are responsible for the organization of media practices around the creation of economic value for the companies. The article examines the news feeds as a type of social space where these logics are manifested in the decisions of the platforms about what and when to show to their users. In this context, practices of sociability aimed at increasing recognition in social media platforms should be understood within a broader movement of datafication of society, which deepens the presence of capitalist logics in social life.
Investigation of link due to atmospheric turbulence in free space optical communication for optical wireless terrestrial networks
Authors: Vasava Priteshkumar B. , Lapsiwala Pranav B.
Published: July 2022

In recent years, wireless communication systems have exploded in popularity. Optical wireless technology is an excellent alternative to RF wireless, but it has high capacity, data speed, frequency, and license-free spectrum, and it is simple to implement. Optical wireless communication sends data through air using optical beams. Atmospheric turbulence degrades the functioning of free-breathing space photosensitive interaction methods by causing interruptions due to weather conditions like fog, smoke, and different pollutants. In this paper, free-space optical communications using snow and fog attenuations and Numerical Weather Prediction (NWP) method is used to determine the turbulence due to the atmosphere. This method improves the data transmission during unfavorable weather conditions by changing the various parameters like receiver aperture size, the wavelength of the transmitter, etc. Furthermore it shows that decrease in air quality and instability are the double significant causes, that can degrade general usage routine, especially when it’s foggy or raining heavily. The result shows that the aperture size and wavelength should be changed as per the weather condition.
Oxygenation of the newborn. The impact of one molecule on newborn lives
Authors: Saugstad Ola Didrik
Published: July 2022

Hypoxanthine is a purine metabolite which increases during hypoxia and therefore is an indicator of this condition. Further, when hypoxanthine is oxidized to uric acid in the presence of xanthine oxidase, oxygen radicals are generated. This was the theoretical basis for suggesting and studying, beginning in the 1990s, resuscitation of newborn infants with air instead of the traditional 100% O2. These studies demonstrated a 30% reduction in mortality when resuscitation of term and near term infants was carried out with air compared to pure oxygen. The mechanism for this is not fully understood, however the hypoxanthine –xanthine oxidase system increases oxidative stress and plays a role in regulation of the perinatal circulation. Further, hyperoxic resuscitation inhibits mitochondrial function, and one reason may be that genes involved in ATP production are down-regulated. Thus, the study of one single molecule, hypoxanthine, has contributed to the global prevention of an estimated 2–500,000 annual infant deaths.
Voice and Fertility, (Self‐)Impregnation and (Inter‐)Dependence: The Pseudonyms and their (Narratives about) Wives
Authors: Fürstenberg Henrike
Published: July 2022

By analyzing prefaces and other short excerpts written by different pseudonyms (Nicolaus Notabene, Hilarius Bookbinder, Frater Taciturnus, Judge William and, in contrast, Johannes the Seducer), this paper explores the pseudonymous authors’ relation to their spouses. It assumes that recurring motifs in the prefaces, such as ‘voice’ and the metaphor of ‘fertility,’ reveal, often in ironic tones, general gender-related aspects of identity in Kierkegaard’s works. The paper thus explores how the seemingly stereotyped and archaic conception of gender in the prefaces, such as the pseudonymous author’s assertion of superiority of (male) reasoning through writing over the (female) immediacy represented in voice, reflect aspects of the individual’s disposition before God.
“A Place of Rest at the Foot of the Altar”: Topological Categories and Correlations in Kierkegaard’s last Discourse at the Communion on Fridays
Authors: Haizmann Albrecht
Published: July 2022

This article describes a rhetorical characteristic of Kierkegaard’s thirteen Discourses “at the Communion” on Fridays (1848 – 1851), namely, their way of expressing religious truths, theological distinctions, and homiletic statements by a certain concept of space, place and movement, thus making them existentially accessible. It illustrates the fundamental meaning of this series of discourses and especially the last discourse for Kierkegaard’s entire work as an author. By focussing on the topological categories and correlations in the last discourse (1851), the article demonstrates the constitutive role of spatial terms and meanings and so discovers the theological topology of the series as a whole with its coincidences of soteriological, anthropological, liturgical, rhetorical, and existential movements—leading the listener/reader to the “place of rest at the foot of the altar.”
Kierkegaard’s View on Theater “with Continual References” to Contemporary Theater Theories
Authors: Nagy András
Published: July 2022

There are several reasons to explore the role theater played in the life of Søren Kierkegaard and in the inspiration for his works. There are probably more reasons to analyze the role Kierkegaard played for theater, both as a source of inspiration and as a thinker reflecting on different facets of drama, performance, and acting. In the present study I focus on the diversity and complexity of Kierkegaard’s views on theater to elaborate on the possible connections and types of influence he exercised on stage artists and theorists, shaping our contemporary theater theories. Approaches include literature, philosophy, theology, staging, acting, audience, and the history of theater, both in Kierkegaard’s times and later.
Kierkegaard’s Hermeneutics of Anxiety and Agonistic Hermeneutics
Authors: Bârzu Ștefan
Published: July 2022

The issue of anxiety has been thoroughly debated in Kierkegaardian scholarship from multiple standpoints and traditions, but not so much when it comes to the hermeneutic undertone. This article is primarily concerned with tackling the concept of anxiety as a hermeneutical concept, or working with it through hermeneutical lenses; nevertheless, the implications go deeper—making a case for an original hermeneutic anxiety, an agonistic trait of hermeneutics. By exploring the hermeneutical dimensions of the Kierkegaardian anxiety we unravel a whole genealogy of the agonistic phenomena—a hermeneutical way that thrives in the paradox. The scope of it all is to break with the conciliatory ways of an epistemic hermeneutics, by regaining the Kierkegaardian hermeneutics of anxiety: preferring the fertile struggle over the passionless synthesis, paradox over soundness and agony over apathy.
Kierkegaard’s Deontology of Love
Authors: Petkanič Milan
Published: July 2022

Deontology is mostly reflected and discussed in connection with Kantian ethics, but in the history of thought there is found another outstanding concept of deontological ethics: Kierkegaard’s ethics of love. This paper clarifies the deontological nature of Kierkegaard’s ethics as it is formulated in his key ethical treatise Works of Love (1847). According to Kierkegaard, whose ethics of love was basically his own original interpretation of the Christian concept of neighbor-love, duty is the distinctive feature of love—since Christian love is defined as a command to ‘love thy neighbor.’ For Kierkegaard it is precisely this duty that creates a dividing line between authentic love and non-authentic love: the first one stands for the Christian love for the neighbor, while the latter refers to the natural concept of love as an emotion or inclination exemplified mainly by éros and friendship. The deontological concept of love is challenged later in the article by other aspects of love, such as a need, feeling, and virtue, which at first sight seem to be in a contrast with the concept of love as a duty.
Colossal Vacuums: Kierkegaard and the Rise of the Public in the Anthropocene
Authors: Wilde Niels
Published: July 2022

In this paper, I argue that the debate in the environmental humanities about the reconceptualization of the human being as one (humanity as a geologic agent) vs. many (human individuals) in light of the Anthropocene, resembles the very structure of Kierkegaard’s notion of the public as a compound object (one entity) composed of individuals (several entities). Further, I argue that the public provides not only a model for understanding the ontological makeup of the Anthropos but also serves as an early version of it. Hence, the public plays a role in the very emergence of the Anthropocene itself.
Time or Eternity? An Approach to the Kierkegaardian Notion of Spirit through the Movement of Finitude in Dialogue with Levinas
Authors: Carpintero Acero Raquel
Published: July 2022

This paper aims to portray the human being as spirit, in dialogue with Levinas’ first philosophy. The relation between time and eternity is addressed in the work of both Kierkegaard and Levinas. However, in Kierkegaard’s notion of spirit there lies a discernible further development of the relation between the subject and that which transcends it (that is, exteriority or otherness). In Kierkegaard’s authorship, the absolute exteriority of the eternal does not break or suspend the finite structure of the subject. Contrary to Levinas’ critique of the Danish philosopher, the possibility of a life is opened in which neither the external world nor the relation with the others is disdained.
Law and Gospel, Distinction and Dialectic: C.F.W. Walther, Søren Kierkegaard, and the Rich Young Ruler
Authors: Coe David Lawrence
Published: July 2022

Nineteenth-century Lutheran giants C.F.W. Walther and Søren Kierkegaard both stressed over the application of Martin Luther’s doctrine of Law and Gospel. Both viewed Law and Gospel as concepts to be distinguished and as concepts that dialectically belong together. To his Pelagian audience tempted to abuse the Law and abolish the Gospel, Walther stressed the distinction of Law and Gospel. To his Antinomian audience tempted to abuse the Gospel and abolish the Law, Kierkegaard stressed the dialectic of Law and Gospel. Walther and Kierkegaard’s contrasting Law and Gospel emphases are clearly seen in their contrasting accounts of the Rich Young Ruler in the Synoptic Gospels.
Metaphysical Compatibilism and the Ontology of Trans-World Personhood: A Neo-Lewisian Argument for the Compatibility of Divine Foreknowledge (Determinism) and Metaphysical Free Will
Authors: Lenart Bartlomiej Andrzej
Published: July 2022

David Lewis’ contemplations regarding divine foreknowledge and free will, along with some of his other more substantial work on modal realism and his counterpart theory can serve as a springboard to a novel solution to the foreknowledge and metaphysical freedom puzzle, namely a proposal that genuine metaphysical freedom is compatible with determinism, which is quite different from the usual compatibilist focus on the compatibility between determinism and moral responsibility. This paper argues that while Lewis opens the doors to such a possibility, in order to fully elucidate a genuinelymetaphysical compatibilistaccount, Lewis’ own counterpart theory must be abandoned in favour of an account of trans-world identity that is theoretically framed by a modified version of Robert Nozick’s closest continuer theory.
Multichannel terahertz quasi-perfect vortex beams generation enabled by multifunctional metasurfaces
Authors: Liu Wanying , Yang Quanlong , Xu Quan , Jiang Xiaohan , Wu Tong , Gu Jianqiang , Han Jiaguang , Zhang Weili
Published: July 2022

Vortex beams carrying orbital angular momentum (OAM) open a new perspective in various terahertz research. Multichannel and divergence controllable terahertz vortex beam generation holds the key to promoting the development of OAM related terahertz research. Here, we introduced and experimentally demonstrated quasi-perfect vortex beam (Q-PVB) with a controllable divergence angle independent of the topological charge and multichannel Q-PVBs generation with all-dielectric multifunctional metasurfaces. By superimposing specific phase functions together into the metasurfaces, multiple vortex beams and four-channel Q-PVBs with different topological charges are generated as well as focused at separated positions. High resolution characterization of terahertz electric field shows the good quality and broadband properties of Q-PVBs. Interestingly, compared with conventional perfect vortex beam; Q-PVB displays a smaller divergence angle and thinner ring width. The metasurfaces proposed here provide a promising avenue to realize multichannel vortex beams generation in compact terahertz systems; benefiting OAM related researches such as mode division multiplexing, vortex beam related plasmonic enhancement and spinning objective detection.
Use of SVM-based ensemble feature selection method for gene expression data analysis
Authors: Zhang Shizhi , Zhang Mingjin
Published: July 2022

Gene selection is one of the key steps for gene expression data analysis. An SVM-based ensemble feature selection method is proposed in this paper. Firstly, the method builds many subsets by using Monte Carlo sampling. Secondly, ranking all the features on each of the subsets and integrating them to obtain a final ranking list. Finally, the optimum feature set is determined by a backward feature elimination strategy. This method is applied to the analysis of 4 public datasets: the Leukemia, Prostate, Colorectal, and SMK_CAN, resulting 7, 10, 13, and 32 features. The AUC obtained from independent test sets are 0.9867, 0.9796, 0.9571, and 0.9575, respectively. These results indicate that the features selected by the proposed method can improve sample classification accuracy, and thus be effective for gene selection from gene expression data.
Ohne Pflege keine Implementierung von Spiritual Care
Authors: von Dach Christoph , Zumstein-Shaha Maya
Published: July 2022

Hintergrund: Pflegefachpersonen kümmern sich rund um die Uhr um Patientinnen und Patienten. Daher sind Pflegefachpersonen oft als erste mit spirituellen Fragen und Bedürfnissen konfrontiert. Somit ist die Integration der spirituellen Betreuung für sie ein wichtiges Anliegen. Allerdings fühlen sich die Pflegefachpersonen oft unsicher und überfordert. Es fehlt an gezielten Aus- und Weiterbildungen. Gleichzeitig fehlt den Pflegefachpersonen die nötige Unterstützung durch die Institution.

Forschungsfrage: Welche Bedeutung hat die Pflege bei der Umsetzung der spirituellen Betreuung von Menschen mit onkologischen Erkrankungen? Untersucht werden die Bedürfnisse und Anliegen der Patientinnen und Patienten sowie die Bedeutung und der Umgang mit der eigenen Spiritualität der Pflegefachpersonen.

Methode: Zu diesem Zweck wurde ein Scoping Review in PubMed und Google Scholar durchgeführt. Die Erkenntnisse wurden mit den Ergebnissen einer Sekundäranalyse einer qualitativen Online-Umfrage unter Schweizer und US-amerikanischen Nurse Practitioner-Studierenden und Nurse Practitioners zusammengeführt. Es wurden insgesamt vier Themen identifiziert.

Schlussfolgerung: Spiritual Care kann nicht ohne Pflege umgesetzt werden. Denn sie gestalten die wesentlichen Voraussetzungen im klinischen Alltag. Es braucht jedoch strukturierte Dokumentation im Pflegeprozess und formale Austauschforen in interdisziplinären Meetings. Dazu muss eine Kultur aufgebaut werden, die spirituelle Pflege ermöglicht und von der Leitung unterstützt wird. Weitere Forschung zu diesem Thema ist notwendig.
Energy of a digraph with respect to a VDB topological index
Authors: Monsalve Juan , Rada Juan
Published: July 2022

Let

D

D

be a digraph with vertex set

V

V

and arc set

E

E

. For a vertex

u

u

, the out-degree and in-degree of

u

u

are denoted by

d

u

+

{d}_{u}^{+}

and

d

u

−

{d}_{u}^{-}

, respectively. A vertex-degree-based (VDB) topological index

φ

\varphi

is defined for

D

D

as

φ

(

D

)

=

1

2

∑

u
v
∈
E

φ

d

u

+

,

d

v

−

,

\varphi (D)=\frac{1}{2}\sum _{uv\in E}{\varphi }_{{d}_{u}^{+},{d}_{v}^{-}},

where

φ

i
,
j

{\varphi }_{i,j}

is an appropriate function which satisfies

φ

i
,
j

=

φ

j
,
i

{\varphi }_{i,j}={\varphi }_{j,i}

. In this work, we introduce the energy

ℰ

φ

(

D

)

{{\mathcal{ {\mathcal E} }}}_{\varphi }(D)

of a digraph

D

D

with respect to a general VDB topological index

φ

\varphi

, and after comparing it with the energy of the underlying graph of its splitting digraph, we derive upper and lower bounds for

ℰ

φ

{{\mathcal{ {\mathcal E} }}}_{\varphi }

and characterize the digraphs which attain these bounds.
Sakuranetin and its therapeutic potentials – a comprehensive review
Authors: Junaid Md. , Basak Bristy , Akter Yeasmin , Afrose Syeda Samira , Nahrin Afsana , Emran Rashiduzzaman , Shahinozzaman Md. , Tawata Shinkichi
Published: July 2022

Sakuranetin (SKN), a naturally derived 7-O-methylated flavonoid, was first identified in the bark of the cherry tree (Prunus spp.) as an aglycone of sakuranin and then purified from the bark of Prunus puddum. It was later reported in many other plants including Artemisia campestris, Boesenbergia pandurata, Baccharis spp., Betula spp., Juglans spp., and Rhus spp. In plants, it functions as a phytoalexin synthesized from its precursor naringenin and is the only known phenolic phytoalexin in rice, which is released in response to different abiotic and biotic stresses such as UV-irradiation, jasmonic acid, cupric chloride, L-methionine, and the phytotoxin coronatine. Till date, SKN has been widely reported for its diverse pharmacological benefits including antioxidant, anti-inflammatory, antimycobacterial, antiviral, antifungal, antileishmanial, antitrypanosomal, glucose uptake stimulation, neuroprotective, antimelanogenic, and antitumor properties. Its pharmacokinetics and toxicological properties have been poorly understood, thus warranting further evaluation together with exploring other pharmacological properties such as antidiabetic, neuroprotective, and antinociceptive effects. Besides, in vivo studies or clinical investigations can be done for proving its effects as antioxidant and anti-inflammatory, antimelanogenic, and antitumor agent. This review summarizes all the reported investigations with SKN for its health-beneficial roles and can be used as a guideline for future studies.
Morphological studies and photocatalytic degradation of methylene blue by zinc sulfide nanoparticles
Authors:   School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa, Ajibade P. A. , Solomane N. ,   School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa, Sikakane B. M. ,   School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa
Published: July 2022

"We report the preparation, morphological and photocatalytic studies of zinc sulfide nanoparticles from zinc(II) dithiocarbamate precursors. Powder X-ray diffraction patterns were index to the wurtzite crystalline phase of zinc sulfide while transmission electron microscopy micrographs revealed spherically shaped particles with sizes in the range 2.8 to 5.2 nm. The ZnS nanoparticles were used as photocatalysts for the degradation of methylene blue with degradation efficiency of 71.41% for ZnS1 and 85.95% for ZnS2 nanoparticles at pH 9.43. The effect of catalyst concentration, pH, radical scavengers, and hole (h+ ) scavengers on the photodegradation of methylene blue dye were evaluated."
Chalcogenide glassy semiconductors of the system As-Ss-S-Sn for X-ray imaging
Authors:   Semiconductors Physics and Devices Laboratory, Physics and Engineering Faculty, Moldova State University, Chisinau, Republic of Moldova, Chirita A. , Prilepov V. ,   Semiconductors Physics and Devices Laboratory, Physics and Engineering Faculty, Moldova State University, Chisinau, Republic of Moldova
Published: July 2022

The polymer/As-Se-S-Sn structure for X-ray imaging has been investigated. The possibility of registering relief-phase images for X-ray radiation of 0,154 nm was shown.
Study of zinc salt concentration effect on the growth of zno nanostructured oxides obtained by direct electrodeposition
Authors:   Pollution and waste treatment laboratory (PWTL), Kasdi Merbah Ouargla University .P.O. Box 511, 30000, Algeria., Kamarchou A. , Atia S. ,   Pollution and waste treatment laboratory (PWTL), Kasdi Merbah Ouargla University .P.O. Box 511, 30000, Algeria., Zobeidi A. ,   Department of Chemistry, Faculty of Exact Sciences, University of El Oued, El Oued, Algeria, Chettah H. ,   Laboratoire d’énergétique et d’électrochimie du solide, Département de génie des procédés, Faculté de Technologie, U. F. A. Sétif 1, Sétif, 19000, Alegria, Benhamida S. ,   Univ. Ouargla, Fac. des Mathématiques et des Sciences de la Matière, Lab. Rayonnement et Plasmas et Physique de Surface, Ouargla 30 000, Algeria, Abdi D. ,   Laboratoire d’énergétique et d’électrochimie du solide, Département de génie des procédés, Faculté de Technologie, U. F. A. Sétif 1, Sétif, 19000, Alegria, Rahal F. ,   Laboratoire d’énergétique et d’électrochimie du solide, Département de génie des procédés, Faculté de Technologie, U. F. A. Sétif 1, Sétif, 19000, Alegria, Berchi A. ,   Laboratoire d’énergétique et d’électrochimie du solide, Département de génie des procédés, Faculté de Technologie, U. F. A. Sétif 1, Sétif, 19000, Alegria, Chaabia N. ,   Laboratoire d’énergétique et d’électrochimie du solide, Département de génie des procédés, Faculté de Technologie, U. F. A. Sétif 1, Sétif, 19000, Alegria
Published: July 2022

"Effect of zinc salt concentration on the growth of electrodeposited zinc oxide phases was investigated. ZnO thin films were elaborated via chronoamperometry on fluorine doped tin oxide (FTO) substrates from aqueous mixed bath of zinc nitrate and chlorate at 70°C. X ray diffraction patterns showed nanocrystalline films of hexagonal wurtzite phase with (101) preferential orientation for ZnO as grown in low concentration of Zn2+ salt. High concentration of Zn2+ favor the formation of Zn5(OH)8Cl2H2O simonkolleite phase. After heat treatment at 400 °C for 1h this later decomposes to ZnO oxide which presents no preferential orientation. The route mean square RMS roughness of surfaces estimated from AFM technique shows that ZnO generated from heat treated Zn5(OH)8Cl2H2O present more increasing roughness than ZnO deposits obtained at lower salt concentration. The photoelectrochemical answer indicated important generated photocurrents for both films which present n-type electrical conductivity"
Optical properties of Al-doped with zinc oxide (AZO) thin films with PLD technique
Authors:   Physics Department, College of Science, Sudan University of Science and Technology, Khartoum 11113, Sudan, Eisa M. H. , Faraj M. G. ,   Department of Physics, Faculty of Science and Health, Koya University, Koya KOY45, Kurdistan Region – F.R. Iraq
Published: July 2022

Pulsed laser deposition (PLD) was used to deposit aluminum (Al)-doped zinc oxide (AZO) thin films with various Al ratios onto glass substrates. Ultraviolet (UV) -visible spectroscope was used to study the impact of Al doping on the physical properties of ZnO. Aluminum was doped into ZnO at 0, 6, and 12% concentrations successfully. The transmittance of the AZO films in the UV region is high, typically of 80% than that of ZnO films. AZO films’ optical band gap (3.02-2.76 eV) was below that obtained in undoped ZnO films (3.37 eV). The ZnO thin films' reflectance (R) and refractive-index (n) were high in the UV region, but gradually diminished between 300 and 400 nm. The extinction coefficient decreased as the amount of Al increased in the ZnO thin films. The method used for the experiment and study findings is presented and fully discussed. The values were calculated and measured in comparison to previously published data.
Influence of structural, electronic and optical properties of boron and nitrogen doping in tetragonal PbTiO3: insight from first-principles
Authors:   Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China, Lu T. Y. , Huang B. R. ,   Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China, Wen Z. Q. ,   Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China, Huang L. T. ,   Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China, Wei X. P. ,   Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China, Zou Z. G. ,   Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
Published: July 2022

The structural, electronic and optical properties of intrinsic, B- and N-doped tetragonal PbTiO3 are investigated by first-principles calculations. After doping with B (N) atom, the stability of the system decreases, but it is still thermodynamically stable. B-doped (N-doped) PbTiO3 appear new B-2p (N-2p) impurity bands near Fermi level, reducing the bandwidth from 2.02eV to 0.56eV (0.43eV). Imaginary part of dielectric function has the largest peak at the photon energy of 5.81 eV, which originates from the transition of electrons from the occupied O-2p VB states to the unoccupied Ti-3d CB states. The static refractive index of B- and N-doped PbTiO3 are larger than that of PbTiO3. B-doped (N-doped) PbTiO3 can increase the light absorption capacity of near-infrared wavelengths and visible light, and energy loss in the visible light range is very small, indicating that Band N-doping are expected to improve the optical properties of PbTiO3.
Influences of Ag+LiAlO2 on mechanical and high temperature wear behavior of magnesium hybrid composites
Authors:   Assistant professor, Kumaraguru College of Technology, Tamilnadu, India, Suresh T. , Sures P. ,   Professor, Sona College of Technology, Tamilnadu, India, Prabu M. ,   Associate Professor, K.S.R College of Engineering, Tamilnadu, India
Published: July 2022

The objective of this research is to analyze the mechanical such as porosity; hardness and high temperature wear behavior of Magnesium (MgZE41A) hybrid composites reinforced with Silver (Ag) and Lithium Aluminate (LiAlO2). The various wt. % such as Ag (1.0 & 1.5) and LiAlO2 (1.0 & 1.5) was reinforced in MgZE41A using Powder Metallurgy (P/M) technique. The sintered composites were characterized using Scanning Electron Microscope (SEM) coupled with Energy Dispersive Spectroscopy (EDS) line mapping Technique. The porosity and Vicker’s hardness of the samples were assessed. Further, the high temperature wear behavior of the composites was evaluated using tribometer with heater setup by varying the heat inputs such as 30°C, 50°C, 100°C, 150°C and 200°C. The results revealed that increasing the wt. % of Ag and LiAlO2 led to decrease the porosity from 0.11 % to 0.09 % due to high compacting pressure and sintering temperature. High temperature Wear rate of the composites was reduced from 2.15 * 10-4 to 0.83 * 10-4 because of wt. % of reinforcement, high compacting pressure and better sintering temperature.
Co-precipitation method for the preparation of Mn-Zn Ferrite and study their Structural and Magnetic properties
Authors:   University of Diyala, College of Science, Department of physics, Iraq, Shatti W. A. , Mohammed Ali Abbas Z. ,   University of Diyala, College of Science, Department of physics, Iraq, Khodair Z. T. ,   University of Diyala, College of Science, Department of physics, Iraq
Published: July 2022

"Ferrite nanoparticles were synthesized using the co-deposition method with pH = 12. This paper discusses the differences in composition and magnetic properties that contribute to the MnZn ferritic's properties. Samples were prepared, fabricated and annealed at two temperatures (600°C, 900°C). The crystal structure of the prepared samples was obtained using X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy (FTIR) and field emitting electron microscopy (FESEM), respectively. The magnetic properties of the samples prepared by assay (VSM) were obtained and the magnetic and structural properties were discussed based on the changing temperature."
ZEOLIT ALAM INDONESIA SEBAGAI KANDIDAT KATALIS ASAM PADAT YANG UNGGUL UNTUK PROSES UPGRADING BIO-OIL MELALUI TEKNIK ESTERIFIKASI
Authors: Kadarwati Sri , Annisa Riska Nurfirda , Apriliani Evalisa
Published: July 2022

Isu lingkungan dan ketersedian bahan bakar berbasis fosil yang semakin menipis mendorong upaya-upaya eksplorasi sumbersumber energi baru terbarukan yang bersifat lebih ramah lingkungan. Biomassa sebagai salah satu sumber energi terbarukan sangat potensial untuk dieksplorasi dan dikonversi menjadi bahan bakar cair melalui proses pirolisis menjadi bio-oil. Namun sayangnya, bio-oil tidak dapat langsung digunakan sebagai bahan bakar mesin berteknologi tinggi, seperti mesin kendaraan bermotor, diantaranya karena keasamannya yang tinggi, bersifat tidak stabil dan nilai kalor yang rendah. Upaya peningkatan kualitas bio-oil terus diteliti dan dikembangkan. Beberapa proses upgrading bio-oil seperti pembentukan emulsi dan penambahan pelarut, hydrocracking, hydrotreatment, steam reforming, dan reaksi dalam supercritical fluids telah diteliti dan dikembangkan. Esterifikasi merupakan salah satu teknik upgrading bio-oil yang sederhana, murah dan cukup efektif untuk meningkatkan kualitas bio-oil. Pada bab ini, upgrading bio-oil melalui teknik esterifikasi katalitik didiskusikan secara rinci. Beberapa katalis baik homogen maupun heterogen yang digunakan dalam proses esterifikasi biooil baik bio-oil riil maupun senyawa-senyawa model juga dijelaskan. Selain itu, penggunaan katalis berbasis zeolit yang terfokus pada zeolit alam Indonesia dikaji potensi dan keunggulannya secara mendalam.
Prospective Madrasah Teachers' Scientific Competencies Integrated with Scientific Literacy through the STEM Approach
Authors: Rokhimawan M. A. , Yuliawati F. , Kamala I. , Susilawati S.
Published: July 2022

This study aims to measure the scientific competence of prospective teachers of Madrasah Ibtidaiyah integrated scientific literacy through a STEM approach. The research method used was descriptive quantitative with a sample of 40 students from the same study program at two different universities. The selected sample has taken basic science courses with a minimum score of B. This research used a purposive sampling technique, where the sampling actively participates in learning activities. Data were collected using a set of instruments to analyze the prospective teachers’ scientific competence. The instruments were declared valid based on expert judgment and showed a Cronbach Alpha score of 0.68 before being used. Scientific competence data were obtained from the results before and after the essay, practicum, multiple-choice test, and questionnaire instruments. Data were analyzed descriptive quantitative using inferential statistics with a T-test. Inferential statistical analysis revealed differences in scientific competence of prospective madrasah teachers in Study Program A and Study Program B (t = 5.98 1.83). The measurement results of the test of science content mastery aspect with an average of 58.3 and 50.8. The practicum mastery of science process skills results from the problem-solving skills test are 48.4 and 39.6. From the questionnaire results on scientific literacy, students still need to improve their independence in studying science, scientific thinking skills, the ability to use scientific knowledge in problem-solving, and integrating the STEM approach. From the findings, it can be concluded that the analysis of the scientific competence of prospective madrasah teachers shows an apparent and significant difference. The prospective madrasa teachers’ scientific competence is needed to prepare students as prospective teachers who are STEM literate.
Greenhouse Gas Emissions and Biogas Potential from Livestock in Rural Indonesia
Authors: Heriyanti A. P. , Purwanto P. , Purnaweni H. , Fariz T. R.
Published: July 2022

The livestock sector is one of the most significant contributors to greenhouse gas (GHG) emissions. Jetak Village in Indonesia has a large livestock population, so it has the potential to be a reasonably high contributor to GHG emissions. Therefore, research is needed to calculate GHG from the livestock sector and calculate biogas potential. Besides, we also discuss data collection techniques that are important but often forgotten in GHG reduction studies in developing countries. This is useful as an effort and reference to reduce GHG emissions in rural areas, especially in Jetak Village. The GHG calculation uses the Tier-1 method, while the data on the potential for biogas utilization is obtained from manure production calculations and in-depth interviews. The calculation results show that the highest total GHG from livestock management in Jetak Village in 2017 was 1,106.69 tons CO2-eq/year, while the lowest total GHG emissions in 2015 were 1,018.41 CO2-eq Gg/year. Dairy cows are the biggest emitter in livestock management, with 4,919.61 tons of CO2-eq/year, and laying hens are the lowest emitters with 1.39 tons CO2-eq/year. Dairy cows are the largest contributor to GHG emissions in enteric fermentation with 9,680.52 tons CO2-eq/year, and the lowest number of contributors is horses with 20.79 tons CO2-eq/year. The potential of biogas in Jetak Village based on manure production is 137 installations. The positive community's perception supports this. It tends to be less valid regarding livestock population data used for GHG calculations, so we verified it during in-depth interviews. The in-depth interview process used local language to enhance the quality of responses. This research needs to be developed considering our findings that there are only 50 biogas installations, indicating the biogas potential is not being utilized to its full potential.
Environmental Education in Elementary School with Kamiholo: Kamishibai and Hologram as Teaching Multimedia
Authors: Hernawan A. H. , Septiana A. I. , Rachman I. , Darmawan D. , Kodama Y.
Published: July 2022

In environmental education, there have been many studies on learning multimedia, but the media used tends to be limited to the use of conventional media. In this study, we investigate the feasibility of Kamiholo, a combination between hologram and Kamishibai for environmental education in elementary school to improve the students' learning outcomes. To avoid bias and increase objectivity, the learning outcomes of Kamiholo utilization will be compared with those of conventional Kamishibai utilization. The experiments in the control and experimental groups both show good results. However, there is a significant difference in the improvement of the student achievement when learning using Kamiholo based on the N-Gain, where the N-Gain value of Kamiholo and Kamishibai are 0.69 and 0.49, respectively. Overall, we have successfully demonstrated the advantages of our new multimedia by combining holograms and Kamishibai for environmental education.
Engineering Critical Thinking in Chemical Engineering-Implementation and Student’s Perception
Authors: Raut N.
Published: July 2022

Chemistry for Engineers is a fundamental subject in the Chemical Engineering curriculum, and it serves as a bridge between science and engineering by integrating theoretical concepts with real-world situations. To be successful in their careers, future engineers must master the skill of critical thinking. The goal of this research is to use the DoIt@Home Laboratory to improve students' critical thinking and problem-solving skills. The Carona pandemic necessitated the development of this component, which consists of a series of laboratory exercises that require pupils to demonstrate critical thinking skills. In order to better understand students' perceptions of and performance in learning CT skills using the new approach, surveys were utilized to evaluate the DoIt@Home Laboratory. We were able to demonstrate that the DoIt@Home Laboratory is an effective method for enhancing critical thinking skills. 75 % of students have adequate reasoning, evaluation, and problem-solving skills. Indicators from both chemistry and statistics lend credence to their arguments. 52 % of students think they have a good grasp on the fundamentals of chemistry, meaning that they can explain phenomena and study results, defend their positions with evidence, and synthesize arguments.
Women with polycystic ovary syndrome have poorer work ability and higher disability retirement rate at midlife: a Northern Finland Birth Cohort 1966 study
Authors: Kujanpää Linda , Arffman Riikka K , Vaaramo Eeva , Rossi Henna-Riikka , Laitinen Jaana , Morin-Papunen Laure , Tapanainen Juha , Ala-Mursula Leena , Piltonen Terhi T
Published: July 2022

Objective

Polycystic ovary syndrome (PCOS) presents with multiple comorbidities potentially affecting function. This was the first general population-based study to evaluate work ability, participation in working life, and disability retirement in middle-aged women with and without PCOS.

Design

This is a cohort study.

Methods

Women with PCOS (n = 280) and women without PCOS symptoms or diagnosis (n = 1573) were identified in the Northern Finland Birth Cohort in 1966 and were evaluated for self-rated work ability and potential confounders at age 46. Next, incidence rate ratios (IRRs) for disability and unemployment days were extracted from national registers during a prospective 2-year follow-up. Lastly, we assessed hazard ratios (HRs) for disability retirement between 16 and 52 years of age from national registers.

Results

The women with PCOS reported poorer ability to work at age 46, especially due to poorer health. During the 2-year follow-up period, the affected women gained on average an additional month of disability and unemployment days, corresponding to an approximately 25% higher risk for both disability (IRR (95% CI): 1.25 (1.22–1.27)) and unemployment days (IRR (95% CI): 1.26 (1.23–1.28)) in models adjusted for health and socioeconomic factors. Lastly, we found a two-fold higher cumulative risk for disability retirement by age 52 compared to non-PCOS women (HR (95% CI): 1.98 (1.40–2.80)), which remained after adjusting for confounding factors (aHR (95% CI): 1.55 (1.01–2.38)).

Conclusions

PCOS is associated with lower participation in working life already in midlife. Acknowledging PCOS-related multimorbidity, concerted efforts are needed to support sustainable careers for women with PCOS.