bluuebunny/crossref_metadata_2025 huggingface dataset:
SOMEHOW I NEED TO WRITE THE VISCERAL
Authors: O’REILLY KIRA
Published: April 2022

Somehow I need to write the Visceral, the fleshy, felt, internal, unstable splanchnic (what a word), to reach some fleshy language that can find crevices to proliferate. I’m rereading the first Burroughs I ever read, retracing those linguistic mutated memes that found synaptic connection in my art making, both performance art and biologic art practice. But I’m resistant and I’ve realised that my resistance is that in establishing ways to implicate our bodies into biomedia, the measuring, the observing, the intimate proximities that are probing selves can realise interpenetrate with that which we manipulate, the material of the work, its transient flimsiness becomes precarious in its mattering of matter.
Mapping: An original method of practice and research
Authors: Fiordilino Irene
Published: April 2022

The aim of this paper is to expose mapping as an original method of practice and research, striving to reveal its inherent performativity; to demonstrate its many possible applications within a creative process; and to open a line of enquiry on the production of signs (where the term sign is used in its broader sense as anything that conveys a meaning which is not contained in the sign itself). Mapping is here considered a particular instance of drawing: employed to portray the movement of bodies in space within the specific context of my choreographic practice and performance-oriented projects. My recent performance Invisible Cities is used as a case study to analyse mapping as a performative device and draw important conclusions on the meaning of performativity. The paper aims to show how this method has evolved over time from its original scope of documenting my creative process into a source of cyclical scores. The text outlines some practice-based, preliminary findings on maps as an object and on mapping as a process, using cognitive and anthropological theories that informed the method. It shows how the theory of metaphors and the notion of vitality affects influence the formation of signs in both processes of mapping/looking at maps, and moving/looking at movement. Finally, this method is suggested as a valuable approach to a wider category of practice and research related to drawing and performance.
Desarrollo de estados de la cuestión robustos: Revisiones Sistemáticas de Literatura
Authors: García-Peñalvo Francisco José
Published: April 2022

La revisión sistemática de literatura es un método sistemático para identificar, evaluar e interpretar el trabajo de académicos y profesionales en un campo elegido. Su propósito es identificar lagunas en el conocimiento y necesidades de investigación en un campo concreto. Las revisiones sistemáticas conforman una familia amplia de métodos y aproximaciones y resultan totalmente necesarias por el volumen tan enorme de producción científica en formato digital al que se tiene potencialmente acceso. Sin embargo, no es suficiente con adjetivar una revisión como sistemática. El objetivo de este artículo es presentar las diferentes fases que se deben llevar a cabo cuando se realiza una revisión sistemática. Se comienza con la introducción de los marcos metodológicos de referencia para la realización de revisiones sistemáticas, para, a continuación, profundizar en las fases de planificación, realización e informe de la revisión sistemática. De modo que todo artículo que lleve este marbete (revisión sistemática de literatura) además de cumplir unos principios metodológicos y de transparencia, permita que cualquier investigador pueda no solo confiar en las conclusiones derivadas del trabajo, sino evolucionar la revisión sistemática realizada para atacar el problema derivado de la obsolescencia y el continuo avance del conocimiento científico, en consonancia con el modelo de datos FAIR, es decir, que se cumplen con los principios de encontrabilidad, accesibilidad, interoperabilidad y reutilización. Este artículo se ha escrito en español y en inglés.
The Mycenaean Seminar 2017-18
Authors: Woolf Greg
Published: April 2022

This annual publication contains summaries of the Mycenaean Seminar convened by the Institute of Classical Studies. The seminar series has been running since the 1950s, when it focused largely on the exciting new research enabled by the decipherment of Linear B. The series has now evolved to cover Aegean Prehistory in general, and is well known among subject specialists throughout the world. Taken together, the summaries provide a rich resource for Aegean Prehistory, and often provide the only citable instance of new research projects, until their fuller publication becomes possible. The summaries of the seminars have been published as part of BICS since 1963. Starting with the 2015–16 series, the Mycenaean summaries will be published separately online, retaining their original character and their close connection with BICS, and becoming far more widely available as Open Access publications via the Humanities Digital Library.
Suitability of the Carbonate Rocks of the Bekhme Formation Exposed in Shakrook Anticline, Iraqi Kurdistan region, for Cement Industry
Authors: Hamwandy Mohammed J. , Ibrahim Rahel Kh. , Sissakian Varoujan K.
Published: April 2022

The Bekhme Formation forms almost the bulk of the Shakrook anticline, especially the limbs. The current research deals with studying the exposed beds within the Bekhme Formation at the Shakrook anticline to check the suitability of the exposed rocks at the northeastern limb of the anticline for the cement industry. Twenty rock samples from a section which lies along a deeply cut valley that crosses the northeastern limb of the Shakrook anticline within the Bekhme Formation were collected. The channel sampling method was applied; therefore, each sample represents the concerned sampling interval and to be representative for the thickness of the sampled interval. The total thickness of the sampled section is 110 m with a covered interval of 15 m, totaling to 125 m. The collected 20 samples were prepared at the laboratory of the Koya University and were subjected to XRF test at the Tarbiat Modares University, Iran, to indicate the concentration of the main oxides (CaO, MgO, Al2O3, Fe2O3, Na2O, K2O, and SO3), and Cl and L.O.I. The indicated concentrations at each sample, from both universities, were compared and were found to be almost coinciding. The average concentrations at each sample were changed to weighted averages and the results were compared with the Iraqi standards for cement industry. The results revealed that the sampled rocks are excellent for cement production.
Bioremediation Ability of the Local Isolate Enterobacter cloacae from Disposal Site
Authors: Muhammad Hanaa A. , Subhi Hanan T. , Sediq Khalid N.
Published: April 2022

Illegal dumping is a serious problem that needs to be addressed immediately to preserve human health and the environment as if the pollution that arises from it reaches the groundwater, complications of the remediation processes will increase. To decontaminate the organic and inorganic components, bioremediation seems to be the most environmentally friendly and economically viable technique without further treatment as reported by many studies. In this investigation, samples were taken from the soil of the main dumping area in Koysinjaq in Kurdistan Region of Iraq to determine the most potent bacteria to remediate the existed pollutants. The existence of non-essential minerals and organic compounds in the soil sample was detected using X-ray fluorescence device, and ethane and 1,2-dichloroethane solvents separating technique, respectively. Then, from the same samples, three different naturally occurring bacteria were isolated and cultured under optimized conditions then stimulated for a good result. Finally, spectrophotometer was set at wavelength of 600 nm and used to detect the heaviest growth of bacteria after incubating the cultured bacteria on a mineral salt broth medium with the extracted pollutants at pH 7.0 overnight at 32°C. Based on the highest absorbance, the most effective type of bacteria (Enterobacter cloacae) was chosen among others to remediate the organic components in which approximately 90% of them are plastics, medical waste, municipal waste, electrical items, and hydrocarbons, and some heavy metals, for instance aluminum and lead, which were found in the soil.
Bioshock: Infinite as the Mirror of America?
Authors: Kothera Jiří
Published: April 2022

Few mainstream computer games have caused such controversy as Bioshock: Infinite (2013). The third instalment of the Bioshock series is set in the fictional city of Columbia in an alternate history of the early twentieth century, which at first glance appears to be a perfect social utopia. After a while, however, the narrative begins to uncover the multilayered problems of society oppressed by a fraction of the white elite and religious fanaticism. The popularity of the game is not only due to the attractive audiovisual processing and complex game mechanics. It is primarily a story that uses an unprecedented amount of religious symbolism – especially Christian symbols, historical references, polysemic story elements, and a story based on the concepts of frontier myth and American exceptionalism. This work will deal with analysing these phenomena, especially those directly related to the religious and nationalistic topics in the United States.
A Minister to the Secret Fire: Pavel Hošekʼs take on J. R. R. Tolkien (review)
Authors: Kozák Jan A.
Published: April 2022

Book review on Hošek, Pavel, Sloužím Tajnému ohni: Duchovní zdroje literární tvorby J.R.R. Tolkiena [I Am a Servant of Secret Fire: Spiritual Sources of J.R.R. Tolkien’s Literary Work], Brno: Centrum pro studium demokracie a kultury 2019, 191 p.
Extração a frio sequencial e fracionada de sementes de Plantago major e Plantago tomentosa
Authors: Palavicini Sandra Maria Schenatto , Souza Roberta Cristina , Marco Morgana , Bernardi Julia Lisboa , Paroul Natalia , Toniazzo Geciane Backes , Cansian Rogério Luis , Steffens Clarice
Published: April 2022

Este estudo investigou a recuperação de atividades fitoquímicas e biológicas em extratos de sementes de Plantago major e Plantago tomentosa utilizando diferentes solventes. Por meio da extração sequencial e fracionada a frio, utilizando solventes com polaridade crescente (n-hexano, diclorometano e etanol) na recuperação de polifenóis totais, flavonóides, taninos, toxicidade, atividade antioxidante e antimicrobiana. Os extratos de P. major apresentaram 5,9, 1,35 e 4,2 vezes mais polifenóis, flavonóides e taninos totais do que P. tomentosa, respectivamente. O extrato etanólico de P. major apresentou alta atividade antioxidante, porém na P. tomentosa foi observada no extrato diclorometano. Todos os extratos tiveram uma boa concentração inibitória mínima (CIM) contra Staphylococcus aureus, Listeria monocytogenes, Escherichia coli e Salmonella choleraesuis. Os extratos diclorometano e etanólico, de ambas as sementes, não apresentaram toxicidade para Artemia salina. A extração sequencial e fracionada a frio com diferentes solventes mostrou-se uma excelente alternativa para obtenção de alta atividade biológica de sementes de Plantago.
Abordagem bayesiana na avaliação da dissimilaridade em clones de batata-doce
Authors: Valadares Nermy Ribeiro , Fernandes Ana Clara Gonçalves , Rodrigues Clóvis Henrique Oliveira , Silva Maria Thereza Netta Lopes , Silva Rafael Bolina da , Inácio Kariny Bezerra , Ferreira Juliano Lino , Azevedo Alcinei Mistico
Published: April 2022

A disponibilidade de variabilidade genética em bancos de germoplasma é fundamental para o sucesso de programas de melhoramento vegetal. A inferência bayesiana, aliada a técnicas multivariadas, permite identificar essas fontes de variabilidade, auxiliando nas tomadas de decisão no melhoramento de plantas. Logo, objetivou-se avaliar a dissimilaridade genética entre 24 clones de batata-doce por meio de dados qualitativos e quantitativos, utilizando a abordagem multivariada por meio da inferência bayesiana. Na caracterização morfológica, foram utilizados 24 descritores morfológicos e dados de produtividade de raízes e ramas. Para análise estatística foi utilizada a análise multivariada através da inferência bayesiana. Houve variabilidade genética entre os clones de batata-doce. Há grande dissimilaridade dos clones UFVJM05, UFVJM09, UFVJM31, UFVJM37, UFVJM40 com os demais. Esses clones divergentes podem ser utilizados em cruzamentos a fim de obter progênies com alta variabilidade genética. A abordagem multivariada por meio da inferência bayesiana foi eficiente na avaliação da dissimilaridade.
Crescimento de mudas de eucalipto em solo com aplicação do lodo de curtume
Authors: Bitencourt Gislayne de Araujo , Deknes Luzia Barcelos , Antônio Laura Valdemir
Published: April 2022

O lodo de curtume é o resíduo proveniente do beneficiamento do couro bovino, apresenta potencial para ser utilizado como fertilizante no setor florestal, pois apresenta nutrientes essenciais para as plantas. Para tanto, alguns padrões químicos para a aplicação desse resíduo precisam ser definidos, devido à presença de elementos tóxicos, como o cromo. Neste contexto, o presente estudo avaliou os efeitos de diferentes concentrações de lodo de curtume em mudas de eucalipto. As proporções de lodo de curtume utilizadas foram quatro concentrações e uma testemunha (sem aplicação de lodo), sendo elas de 0,1; 1; 10 e 50%. As mudas de híbridos de Eucalyptus grandis x Eucalyptus urophylla, clone I144 com 30 dias, foram transplantadas para os vasos, onde permaneceram por 45 dias. Após este período, foram avaliadas: altura da planta, diâmetro do coleto, número de folhas, comprimento da raiz, massa seca da parte aérea e das raízes, pH, condutividade e análise foliar de Nitrogênio. O aumento crescente das concentrações de lodo de curtume no solo elevou o pH, a condutividade elétrica, e as mudas de eucalipto apresentaram baixo crescimento e desenvolvimento nas aplicações de 10 e 50% de lodo. O uso do lodo de curtume no solo aumentou a disponibilidade do nitrogênio para as plantas e em baixas concentrações, o crescimento de raiz e de altura das mudas nas concentrações de 0,1 e 1,0% foram semelhantes a testemunha, sem adição do resíduo. É recomendada a aplicação de lodo até 10% para evitar efeitos adversos oriundos da salinização do solo nas plantas.
Craqueamento termocatalítico do óleo de cozinha residual usando o pó de aciaria elétrica (PAE) bruto e tratado como catalisador
Authors: Do Carmo Silva Jhemison , Silva Machado Rodrigues Jocelia , Andrade Mancio da Mota Andréia , Alves Rabelo Adriano , Alberto Rocha de Castro Douglas , Duvoisin Junior Sergio , Pereira da Mota Silvio Alex
Published: April 2022

A busca pelo desenvolvimento de energias alternativas e renováveis nas últimas duas décadas (2000 a 2020), intensificadas principalmente neste último ano (2021), devido às importantes mudanças estruturais em governos das principais potências mundiais, como é o caso dos Estados Unidos e dos países que fazem parte da União Europeia, resultaram em um aglomerado de novas ideias, com potencial para aplicação, de acordo com cada especificidade e geopolítica das nações. Neste contexto, realizou-se estudos visando a obtenção de biocombustíveis a partir do processo de craqueamento em escala de bancada. Para o desenvolvimento deste trabalho, foi empregado como matéria-prima o óleo de cozinha residual, e como catalisadores o PAE bruto e tratado (1200 ºC, 900 ºC, com solução de ácido sulfúrico nas concentrações 0,1M, 0,5M e 1M). As reações foram conduzidas sob as seguintes condições: temperatura de 430 ºC, tempo reacional de 30 minutos e teor de catalisador de 2 %. Os resultados obtidos mostram a eficiência dos catalisadores empregados, com destaque para o pó de aciaria elétrica bruto e tratado termicamente a 900 ºC seguido de lixiviação com soluções de 0,1 e 1,0 molar de H2SO4. Tais catalisadores apresentaram rendimento total em produtos após reação de craqueamento de 78, 68 e 69%, respectivamente. Os hidrocarbonetos identificados nos PLOs apresentaram cadeias de hidrocarbonetos entre C8 e C35.
The Characteristic Behaviour of the Stretch-Orientation Zone during High-Speed PET Spinning**
Authors: Wu Jialin , Guan Diaosheng , Quian Baojun
Published: April 2022

A theory is proposed to separate the on-line stress in the stretch-orientation zone during high speed PET spinning into two parts: the thermodynamically equilibrium or quasi-equilibrium stress associated with rubber elasticity and the non-equilibrium driving stress, which leads to coordinated orientation of the macromolecular chains. Precise and simultaneous measurements of the online spinning parameters at five spinning speeds, ranging from 2200 to 4200 m/min, were conducted. A physical model consisting of a dashpot placed in parallel with a Gaussian network was found to describe well the behaviour of the stretch-orientation zone of high speed PET spinning.
The Modelling of Mold Filling in Resin Transfer Molding
Authors: Gauvin R. , Chibani M.
Published: April 2022

The resin transfer moulding process (RTM) allows the industrial production of large FRP parts. In this technique layers of reinforcements (mats, woven rovings) are inserted into the mold cavity and resin is injected to fill the closed mold applying external pressure. Due to the strong interdependence between mold design, filling behavior and part quality it is most important to control the cavity pressure as the major influencing process parameter. A simple model is proposed to represent the pressure distribution during mold filling. It is based on Darcy’s law for flow of liquids through a porous media and can be applied to single type or combinations of different reinforcements.
Embedded system design for classification of COPD and pneumonia patients by lung sound analysis
Authors: Hassan Naqvi Syed Zohaib , Choudhry Mohmmad Ahmad
Published: April 2022

Chronic obstructive pulmonary disease (COPD) and pneumonia are lethal pulmonary illnesses with equivocal nature of abnormal pulmonic acoustics. Using lung sound signals, the classification of pulmonary abnormalities is a difficult task. A standalone system was conceived for screening COPD and Pneumonia patients through signal processing and machine learning methodologies. The proposed system will assist practitioners and pulmonologists in the accurate classification of disease. In this research work, ICBHI’s and self-collected lung sound (LS) databases are used to investigate COPD and pneumonia patient. In this scheme, empirical mode decomposition (EMD), discrete wavelet transform (DWT), and analysis of variance (ANOVA) techniques are employed for segmentation, noise elimination, and feature selection, respectively. To overcome the inherent limitation of ICBHI’s LS database, the adaptive synthetic (ADASYN) sampling technique is used to eradicate class imbalance. Lung sound features are used to train fine Gaussian support vector machine (FG-SVM) for classification of COPD, pneumonia, and heathy healthy subjects. This machine learning scheme is implemented on low cost and portable Raspberry pi 3 model B+ (Cortex-A53 (ARMv8) 64-bit SoC @ 1.4 GHz through hardware-supported language. Resultant hardware is capable of screening COPD and pneumonia patients accurately and assist health professionals.
Allegorie und Lob der Physik: Das Proömium der Paraphrase des Theodoros Metochites zu naturwissenschaftlichen Schriften des Aristoteles
Authors: Kermanidis Markos
Published: April 2022

The present paper undertakes a hermeneutic analysis of the hitherto little investigated preface of Theodore Metochites᾽ Paraphrase of the natural scientific works of Aristotle. Based on a problematic quotation at the very beginning of the proem, the article shows that paraphrase does not only mean, for Metochites, the language-specific clarification of the obscure Aristotelian texts but mainly the elucidation and simplification of the relationship of physics to the rest of the philosophical curriculum, as well as of the interconnection between Aristotle‘s separate treatises of natural sciences. The preface proves to be an indirect, i.e. encoded testimony for the exegetical competition of Theodore Metochites with his coeval George Pachymeres and the most prominent ancient paraphraser of Aristotle, namely Themistius (4th century CE).
Studies on Anemone nemorosa L. extracts; polyphenols profile, antioxidant activity, and effects on Caco-2 cells by in vitro and in silico studies
Authors: Pirvu Lucia , Stefaniu Amalia , Neagu Georgeta , Pintilie Lucia
Published: April 2022

In this study, two polar extracts (aqueous and ethanolic) from the aerial part of Anemone nemorosa L. (dried plant) were assessed to reveal their polyphenols profile, antioxidant activity, cytotoxic, and antiproliferative activity on Caco-2 (ATCC-HTB-37) cell line. In silico studies on two key compounds, protoanemonin and anemonin, on four molecular targets – cyclooxygenase-1 and cyclooxygenase-2, and human tankyrase 1 and human tankyrase 2 in relation to human colon cancer cell development have also been achieved. The results are as follows: caffeic acid esters and quercetin glycosides, including (iso)rhamnetin derivates, are the major polyphenol compounds in wood anemone polar extracts; the two polar extracts indicated very strong antioxidant activity in the interval from 0.1 to 5 µg [GAE] per 1 mL sample (IC50 < 0.290 µg GAE/mL), and in vitro studies on Caco-2 cells have revealed their simultaneous stimulatory and protective activity exactly in the concentration area with the strongest antioxidant activity. In silico studies have revealed moderate inhibitory activity of the two key compounds, anemonin and protoanemonin, on the four molecular targets studied; it was concluded having particular benefits of the wood anemone polar extracts in managing postoperative intestinal recovery, and generally in regenerative medicine.
High-efficiency, environment-friendly moss-enriched microbial fuel cell
Authors: Çek Nurettin , Erensoy Ahmet , Ak Namık , Demirbas Ayhan , Gorgulu Ahmet Orhan , Uslu Hasan
Published: April 2022

Microbial fuel cells (MFCs) can be used to produce clean energy from organic wastes. Various biomasses for MFCs can be used as biofuel materials. Moss (Bryophyta) is a source of biomass materials and can be used as an alternative fuel for microbial fuel cells. In this study, moss-enriched MFCs were produced by using moss as a biofuel source and aluminum and silver as an electrode. As a result of the good electrochemical performance of the metal electrodes (aluminum and silver), higher power density than previous studies involving moss was obtained, with the highest power density in this study being 20 mW/m2. Moreover, in this study, bacterial activity, biofilm formation, soil utilization, pH change, and corrosion were investigated in MFCs and the effects of MFC on power density were discussed. The addition of soil increased the corrosion rate and internal resistance while reducing the power density. As a result of the addition of soil, the power density dropped to 16.13 mW/m2. The corrosion rate was lower than industrial corrosion. Changes in pH confirmed that organic material dissolved and chemical reactions took place. Scanning electron microscope (SEM)-Energy dispersive spectroscopy (EDS) analyzes showed the presence of Bacillus and Coccus bacteria species on the electrode surfaces. These bacteria were acted as biocatalysts by forming a biofilm on the electrode surfaces.
Effects of zinc chloride impregnation states on specific surface and dielectric properties of activated carbons
Authors: Tang Shu Hui , Lee Lin Zhi , Andrew Vanissa Sandra , Mohd Akhmar Aiman Rashidi , Zaini Muhammad Abbas Ahmad
Published: April 2022

The present work was aimed at evaluating the roles of zinc chloride impregnation states on specific surface and dielectric properties in microwave-assisted activated carbon preparation. Activated carbons were synthesized using castor shell at dry impregnation ratios of 1 and 2 (material-to-activator), and in suspensions of distilled water and zinc chloride, at power intensity of 800 W and irradiation time of 5 min. The activated carbons exhibit an improvement in dielectric properties and specific surface with increasing impregnation ratio. Palm kernel shell was employed for comparison to verify the effect of power intensity. At 800 W, the magnitudes of surface area are 1684 m2/g and 1150 m2/g for castor shell- and palm kernel shell-based activated carbons, respectively. A high specific surface brings about a greater methylene blue adsorption for possible applications in wastewater treatment.
An implication of magnetic dipole in Carreau Yasuda liquid influenced by engine oil using ternary hybrid nanomaterial
Authors: Wang Fuzhang , Sohail Muhammad , Nazir Umar , El-Zahar Essam R. , Park Choonkil , Jabbar Noman
Published: April 2022

The aim of this work was to study the enhancement of thermal transportation in Carreau Yasuda liquid passed over a vertical surface in the presence of magnetic dipole. A mixture of tri-hybrid nanoparticles

(Al

2

O

3

,

MoS

3

, TiO

3

)

{\text{(Al}}_{2}{\text{O}}_{3}\text{,}\hspace{.25em}{\text{MoS}}_{3}{\text{, TiO}}_{3}\text{)}

is inserted into the Carreau Yasuda liquid. The transport phenomenon of heat is derived in the presence of heat source/sink contribution. The concept boundary layer theory is engaged to derive the mathematical expression for momentum and energy in the form of coupled partial differential equations. The derivations are transformed into a set of coupled nonlinear ordinary differential equations (ODEs) with the help of suitable similarity transformation. These converted ODEs have been handled numerically via finite element method. The grid-independent analysis is established for 300 elements. The impact of numerous involved parameters on temperature and velocity solution is plotted and their contribution is recorded. Temperature profile is inclined versus the higher values of heat generation and viscous dissipation numbers while thermal layers are also increasing the behavior. A vital role of magnetic dipole is examined to raise the production of thermal layers but declination is noticed in flow profile.
Cytotoxicity test and antibacterial assay on the compound produced by the isolation and modification of artonin E from Artocarpus
kemando Miq.
Authors: Suhartati Tati , Andini Vicka , Ramadhan Ilham , Yandri Yandri , Hadi Sutopo
Published: April 2022

Artocarpus
kemando Miq. is an Indonesian endemic plant rich in flavonoid compounds and bioactivity. Artonin E (compound 1), a flavonoid compound, was isolated from the branch and root bark of the indicated plant, obtained from Karang Anyar, Klaten, Penengahan, South Lampung. Compound (1) was then modified using diazomethane, which produced compound (2). Both compounds were then identified by TLC using standard compound, after which their UV–Vis, FT-IR, 1H and 13C NMR spectra were compared with literature data. Furthermore, the cytotoxicity assay of the compound (1) was determined using leukemia P-388 cancer cells, which showed a strong anticancer activity with IC50 of 1.56 μg/mL. The antibacterial activity of this compound against Bacillus subtilis showed strong activity for 0.3 mg/disc concentration; compound (2) with 0.5 mg/disc concentration, while against Escherichia coli, compound (1) showed moderate activity, while compound (2) did not show any activity.
Lamb wave based approach to the determination of acoustic material parameters
Authors: Johannesmann Sarah , Claes Leander , Feldmann Nadine , Zeipert Henning , Henning Bernd
Published: April 2022

In this paper a measurement procedure to identify viscoelastic material parameters of plate-like samples using broadband ultrasonic waves is presented. Ultrasonic Lamb waves are excited via the thermoelastic effect using laser radiation and detected by a piezoelectric transducer. The resulting measurement data is transformed to yield information about multiple propagating Lamb waves as well as their attenuation. These results are compared to simulation results in an inverse procedure to identify the parameters of an elastic and a viscoelastic material model.
Simulationsbasierte Dimensionierung innerbetrieblicher Transportsysteme
Authors: Mestiri Slaheddine , Fottner Johannes
Published: April 2022

Die Dimensionierung heterogener Transportsysteme ist aufgrund fehlender vergleichender Ansätze eine schwierige Planungsaufgabe, die mit Unsicherheiten und suboptimalen Lösungen verbunden ist. Die hohe Komplexität solcher Systeme lässt sich außerdem analytisch nicht abbilden. Dieser Beitrag stellt einen simulationsbasierten Ansatz vor, welcher für die vorhandenen Randbedingungen anforderungsgerechte und dennoch kostengünstige Lösungsalternativen für das Transportsystem liefert.
Fehlerprognose in der Automobilmontage
Authors: Huber Tobias , Winkler Herwig
Published: April 2022

Die Automobilmontage ist aktuell von der Produktvarianz und dem Faktor Mensch geprägt, sodass diese bisher – trotz zahlreicher präventiver Maßnahmen – nicht gänzlich fehlerfrei gestaltet werden konnte. Mit dem Ziel, jene Fehler prognostizieren zu können, wurde ein Klassifikationsmodell aus dem Bereich des überwachten maschinellen Lernens trainiert und über einen dreimonatigen Zeitraum validiert. Während dieses Zeitraums konnten rund 60 Prozent der relevanten Fehler korrekt vorhergesagt werden.
Anwendung von Datenanalyse im Qualitätsmanagement
Authors: Frey Alex Maximilian , Pampus Oliver , Stadler Finn , Erdler Gilbert-Alexander , Lanza Gisela
Published: April 2022

Die Komplexität heutiger Produktionsprozesse in Verbindung mit einer hohen Datenverfügbarkeit birgt Potenzial für den Einsatz von Data Mining (DM) im Qualitätsmanagement (QM), insbesondere für Produkte mit hohen Qualitätsanforderungen. Die vorliegende Arbeit stellt eine systematische Auswahl eines Vorgehensmodells von DM und dessen Integration mit dem DMAIC-Vorgehensmodell vor. Das Ergebnis ist ein anwendungsorientiertes Vorgehensmodell für den Einsatz von DM im Qualitätsmanagement, welches an einem realen industriellen Anwendungsfall demonstriert wird.
Datenbasierte Logistik
Authors: Grill-Kiefer Gerhard , Schröcker Stefan , Krasser Hannes , Körner Stefan
Published: April 2022

Das breite Spektrum an Tätigkeiten im Supply Chain Management und dessen bestehende Wechselwirkungen führen in Industrieunternehmen zu vielfältigen und herausfordernden Aufgabenstellungen. Für deren ganzheitliche Optimierung bildet eine detaillierte Prozesskostenrechnung die Grundlage. Hierfür sind ein umfassendes Verständnis logistischer Prozesse und die Verfügbarkeit einer von hoher inhaltlicher Qualität gekennzeichneten Datenbasis die Voraussetzung. Darauf aufbauend erfolgt die Entwicklung eines Rechenmodells zur Optimierung der Versorgungsgesamtkosten. In der Modellgestaltung kommt der Visualisierung der Eingangs- und Ergebnisgrößen im Sinne maximaler Transparenz hohe Bedeutung zu. Die Anwendung der Applikation gewährleistet eine datenbasierte Optimierung des Teileversorgungsprozesses.
Servicio público vs. autonomía, el dilema de la cultura periodística cubana
Authors: Olivera Pérez Dasniel , Fernández Hernández Carlos
Published: April 2022

Introducción: El sistema de medios cubano durante la presidencia de Raúl Castro (2006-2018) se ha caracterizado por la pérdida del monopolio estatal-partidista y el descentramiento en la producción y distribución de comunicación. En este contexto de cambios, se analizan las relaciones entre los componentes del sistema mediático que definen la profesionalidad periodística, a partir de los vínculos identificados entre cultura periodística y proyección de la política de medios. Metodología: Se aplicó una metodología cualitativa, con base en la entrevista en profundidad a 21 expertos en Ciencias Políticas y de la Comunicación sobre Cuba, y el análisis de contenido cualitativo a programas políticos, leyes, publicaciones científicas, tesis y otras entrevistas a periodistas cubanos registras en estudios previos. Resultados: El dilema central del periodismo cubano se delinea en la interacción entre roles periodísticos y definición de servicio público; y entre la autonomía periodística y las funciones de los medios orientadas a reforzar el nacionalismo y la defensa nacional. Discusión: El significado de la profesionalidad periodística cubana parece estar más asociado con ideales de justicia social, participación ciudadana, compromiso político y soberanía nacional, y a un modelo formativo de un periodista humanista y crítico; que a la autonomía o a la consistencia de las reglas con las que opera el sistema mediático. Conclusiones: No obstante, coexiste una tensión entre la instrumentalización política -y económica-, y la profesionalización, constituida por un periodismo con fuerte vocación de servicio público y por periodistas que desarrollan estrategias orientadas a la búsqueda de mayor autonomía conceptual y estructural.
Foundational Number Sense Training Gains Are Predicted by Hippocampal–Parietal Circuits
Authors: Chang Hyesang , Chen Lang , Zhang Yuan , Xie Ye , de Los Angeles Carlo , Adair Emma , Zanitti Gaston , Wassermann Demian , Rosenberg-Lee Miriam , Menon Vinod
Published: April 2022

The development of mathematical skills in early childhood relies on number sense, the foundational ability to discriminate among quantities. Number sense in early childhood is predictive of academic and professional success, and deficits in number sense are thought to underlie lifelong impairments in mathematical abilities. Despite its importance, the brain circuit mechanisms that support number sense learning remain poorly understood. Here, we designed a theoretically motivated training program to determine brain circuit mechanisms underlying foundational number sense learning in female and male elementary school-age children (7–10 years). Our 4 week integrative number sense training program gradually strengthened the understanding of the relations between symbolic (Arabic numerals) and nonsymbolic (sets of items) representations of quantity. We found that our number sense training program improved symbolic quantity discrimination ability in children across a wide range of math abilities including children with learning difficulties. Crucially, the strength of pretraining functional connectivity between the hippocampus and intraparietal sulcus, brain regions implicated in associative learning and quantity discrimination, respectively, predicted individual differences in number sense learning across typically developing children and children with learning difficulties. Reverse meta-analysis of interregional coactivations across 14,371 fMRI studies and 89 cognitive functions confirmed a reliable role for hippocampal–intraparietal sulcus circuits in learning. Our study identifies a canonical hippocampal–parietal circuit for learning that plays a foundational role in children's cognitive skill acquisition. Findings provide important insights into neurobiological circuit markers of individual differences in children's learning and delineate a robust target for effective cognitive interventions.

SIGNIFICANCE STATEMENTMathematical skill development relies on number sense, the ability to discriminate among quantities. Here, we develop a theoretically motivated training program and investigate brain circuits that predict number sense learning in children during a period important for acquisition of foundational cognitive skills. Our integrated number sense training program was effective in children across a wide a range of math abilities, including children with learning difficulties. We identify hippocampal–parietal circuits that predict individual differences in learning gains. Our study identifies a brain circuit critical for the acquisition of foundational cognitive skills, which will be useful for developing effective interventions to remediate learning disabilities.
Effect of transparent Pb substrates on the structural, optical, dielectric and electrical properties of copper selenide thin films
Authors:   Department of Physics, Arab American University, Jenin, Palestine, Qasrawi A. F. , Abu Ghannam A. N. ,   Department of Physics, Arab American University, Jenin, Palestine
Published: April 2022

Herein, copper selenide thin films are coated onto transparent lead substrates. Pb/CuSe stacked layers is fabricated by the thermal evaporation technique under a vacuum pressure of 10-5 mbar. They are structurally, morphologically, optically and electrically characterized. Lead substrates enhanced the crystallinity of CuSe through increasing the crystallite sizes, reducing the microstrain and lowering defect densities. In addition, a blue shift in the energy band gap associated with remarkable increase in the value of the high frequency dielectric constant resulted from replacement of glass by Pb substrates. Moreover, significant increase in the optical conductivity in the ultraviolet range of light is observed. Fitting the optical conductivity in accordance with Drude- Lorentz models allowed determining the effect of transparent Pb substrates on the plasmon frequency, scattering time at femtosecond level and drift mobility of CuSe. On the other hand, electrical measurements on the Pb/CuSe/C by imposing an ac signal of low amplitude in the frequency domain of 10-1000 MHz, have shown that the Pb/CuSe can perform as negative capacitance source employable for devices scaling and low power applications.
Analytical study of gradual photovoltaic CuInGaSe2 based solar cell performances
Authors:   Laboratory for the Development of Renewable Energies and their Applications in Saharan Areas (LDERAS), Faculty of Exact Sciences, University TAHRI Mohammed Béchar, Merah B. , Hemmani A. ,   Laboratory for the Development of Renewable Energies and their Applications in Saharan Areas (LDERAS), Faculty of Exact Sciences, University TAHRI Mohammed Béchar, Khachab H. ,   Laboratory for the Development of Renewable Energies and their Applications in Saharan Areas (LDERAS), Faculty of Exact Sciences, University TAHRI Mohammed Béchar
Published: April 2022

The most significant challenge for environment and renewable energy researchers is to achieve good performance, as well as cost efficiency in terms of solar generators especially in the PV sector. Regarding the thin film solar cells based on Cu(In,Ga)Se2, the present work dissertation is concerned with the performance of a graded band gap solar cell based on (CIGS). The aim is to determine the influence of physical and geometrical parameters on performance. Results indicate that the increase in electric field resulting from the gradient of the band gap dismantles the effects of surface recombination. The results obtained are an efficiency of 26 % for Eg0=1.67 eV, Eg1=1.02 eV and a thickness of layer p and n d1=1µm, d2=2µm respectively.
Morphology control of CdSe nanocrystallines
Authors:   Analysis and Testing Research Centre,North China University of Science and Technology, Tangshan 063009, China, Cui Z. M. , Dong C. Z. ,   Qinggong College, North China University of Science and Technology, Tangshan 063009, China, Li Y. L. ,   Analysis and Testing Research Centre,North China University of Science and Technology, Tangshan 063009, China, Zhang Q. J. ,   Analysis and Testing Research Centre,North China University of Science and Technology, Tangshan 063009, China
Published: April 2022

CdSe nanocrystallines with different micromorphology were synthesized by inverse microemulsion method. X-ray diffraction and transmission electron microscopy were used to characterize the micromorphology, phase and ingredient compositions of nanocrystallines. The results indicate that nanosphere, necklace-shaped and bamboo-likeCdSe nanocrystals were successfully prepared. The bamboo- like nanotubes have the best crystallization performance. The red shift of the fluorescence peak can be observed clearly, and bamboo-shaped nanotubes have stronger fluorescence emission. Detailed study on the formation of bamboo-like nanotubes was performed. The mechanism is as follows: the difference of the bound water content at the interface and the free water content in the water core leads to the density difference between outer layer and the center. The diffusion of Se2- and Cd2+induces hollow structure of CdSe nanospheres. Due to the small size effect, hollow nanospheres grow into necklace-shaped and bamboo-structure finally
Green synthesis of ZnS nanoparticles using allium sativum l. extract and study of their structural, optical and electrical properties
Authors:   Department of Physics, Handique Girls’ College, Guwahati-781001, Assam, India, Senapati U. S. , Athparia R. ,   Department of Physics, Gauhati University, Guwahati-781014, Assam, India
Published: April 2022

This work presents a simple, low-cost and environmentally friendly approach for the synthesis of zinc sulfide nanoparticles (ZnS NPs) using Allium sativum L. plant extract. Formation of cubic ZnS NPs is confirmed from X-ray diffraction study. Transmission electron microscopy image confirms the formation of spherical particles of average size 6.5 nm. Direct band gap energy of the NPs is found to increase from 3.87 – 4.25 eV with increasing volume of the extract. Fourier transform infrared spectroscopy analysis confirms the presence of biomolecules in the extract which are involved in the formation of ZnS NPs. The possible growth mechanism of ZnS NPs within the biopolymer matrix has been discussed. The dielectric constant of ZnS NPs is higher than the bulk ZnS. A.C. conductivity increases with increasing frequency and changes practically linearly with applied frequency. The impedance study suggests that the ZnS samples could be used as nano-tuned devices in electronics. It is found that as crystallite size decreases, d.c conductivity rises.
Study of ionizing radiation attenuation of glass as: gamma rays shielding material
Authors:   Medical and Clinical Affairs Department, King Faisal Medical City, Abha 62523, Saudi Arabia, Alqahtani A. M. , Alqahtani M. S. ,   Department of Radiological Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia, Hussein K. I. ,   Department of Radiological Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia, Alkulib A. J. ,   Department of Radiological Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia, Alqahtani F. F. ,   Department of Radiological Sciences, College of Applied Medical Sciences, Najran University, Najran 1988, Saudi Arabia, Elkhoshkhany N. ,   Physics Dept., College of Arts and Sciences at Tabrjal, Jouf University, Al-Jouf, Saudi Arabia, Yaha I. S. ,   Physics Department, Faculty of Science, King Khalid University, Postcode: 9004, Zip code: 61413, Abha, Saudi Arabia, Reben M. ,   Faculty of Materials Science and Ceramics, AGH – University of Science and Technology, al. Mickiewicza 30, 30-059 Cracow, Poland, Yousef E. ,   Physics Department, Faculty of Science, King Khalid University, Postcode: 9004, Zip code: 61413, Abha, Saudi Arabia
Published: April 2022

The primary application of radiation shielding is to safeguard against the harmful effects of radiation. This study investigated the addition of thulium oxide (Tm2O3) to a glass system with a composition of 75 TeO2–5 Li2O–10 ZnO– (10-x)Nb2O5. Multiple radiationshielding parameters, including linear and mass attenuation coefficients, half-value layers, mean free paths, atomic and electronic cross-sections, effective atomic numbers, and effective electron density, were evaluated. The study compared the half-value layer values of the new composite to those of well-known radiation-shielding materials, which include ordinary concrete and commercial glass. The addition of Tm2O3 to glass systems efficiently increases the atomic and electronic cross-sections. While all samples had the greatest linear and attenuation coefficients of 201.5–232.84 cm2 /g at 15 keV, the denser glass had the highest mass attenuation coefficient of 42.80 cm2 /g. The shielding effectiveness depends on the phases structure of TeO2 occurred in the prepared glasses.
“The Dark Face of the Virgin at the Znamenskaya Church” (The Icon Before Which Dostoevsky Prayed)
Authors: Tikhomirov Boris
Published: April 2022

Based on a cross-analysis of the memoir testimony of V. V. Timofeeva (O. Pochinkovskaya) and the materials of Dostoevsky’s creative laboratory, the article establishes the fact of the writer’s prayerful veneration of The Sign, the miraculous icon of the Mother of God, located at the St. Petersburg Znamenskaya (Entrance to Jerusalem) Church on Nevsky Prospect, as well as Dostoevsky’s intention (not realized in one of the episodes of the novel “A Raw Youth”) to portray the main character, Arkady Dolgoruky, at prayer before this miraculous image. When commenting on the draft entry of “The Dark Face of the Virgin at the Znamenskaya Church,” it was discovered there were not one, but two venerated icons of the Sign of the Mother of God in the temple on Nevsky Prospect in the 1870s, Both were replicas of the 12th-century miraculous Novgorod icon of the Sign. One of the replicas dates back to 1175 in the church historical literature, the second — to 1744. Based on an analytical review of the information about these two icons, the article substantiates the assumption regarding which of the two icons is mentioned in the drafts of “A Raw Youth,” as well as which one of them was the object of Dostoevsky’s fervent prayer. The current location of one of these icons is indicated.
Neonatal Opioid Withdrawal Syndrome: A Comparison of As-Needed Pharmacotherapy
Authors: Morrison Tierney M. , MacMillan Kathryn Dee L , Melvin Patrice , Singh Rachana , Murzycki Jennifer , Van Vleet Marcia W , Rothstein Robert , O’Shea Thomas F. , Gupta Munish , Schiff Davida M. , Wachman Elisha M.
Published: April 2022

BACKGROUND AND OBJECTIVE

Methadone and morphine are commonly administered medications for neonatal opioid withdrawal syndrome (NOWS). Infants are increasingly treated with as-needed or “pro re nata” (PRN) medication. The optimal pharmacologic agent for PRN treatment of NOWS has not been examined. This study’s objective is to compare NOWS hospital outcomes between infants treated with PRN methadone versus morphine.

METHODS

We performed a retrospective cohort study of infants pharmacologically treated for NOWS across 4 Massachusetts hospitals between January 2018 and February 2021. Infants born ≥36 weeks gestation with prenatal opioid exposure treated with PRN methadone or morphine were included. Mixed effects logistic and linear regression models were employed to evaluate differences in transition rates to scheduled dosing, length of stay, and number of PRN doses administered depending on PRN treatment agent.

RESULTS

There were 86 infants in the methadone group and 52 in the morphine group. There were no significant differences in NOWS hospital outcomes between groups in adjusted models: transition to scheduled dosing (methadone 31.6% vs morphine 28.6%, adjusted odds ratio 1.21, 95% confidence interval [CI] 0.87–1.19), mean length of stay (methadone 15.5 vs morphine 14.3 days, adjusted risk ratio 1.06, 95% CI 0.80–1.41), and the mean number of PRN doses (methadone 2.3 vs morphine 3.4, adjusted risk ratio 0.65, 95% CI 0.41–1.02). There was an association with nonpharmacologic care practices and improved NOWS hospital outcomes.

CONCLUSIONS

There were no significant differences in NOWS hospitalization outcomes based on pharmacologic agent type; nonpharmacologic care practices were most strongly associated with improved NOWS hospitalization outcomes.