bluuebunny/crossref_metadata_2025 huggingface dataset:
Factors Affecting the Career Choices of Graduating Public Secondary Students in Ligao City Division, Ligao City, Philippines
Authors: Babagay-Llacer Cynthia
Published: January 2022

The purpose of the study was to determine the career choices of graduating public secondary students in Ligao City Division, Ligao City, Philippines, and the factors affecting their career choices. This study identified respondents with focused variables on career choices and the factors affecting career choices. The study expanded career choices in different aspects. This study utilized a questionnaire checklist that facilitated the data-gathering through sampling. The findings revealed that out of 976 secondary students, they interested in Tourism and Culinary Arts(18%), Education and Business (17%), Engineering (16%), Science and Technology and in Medical and Health Care (9%), Arts and Design (6%), and Communication and Information Services and Technical Courses (4%). The career choices of the graduating secondary students are influenced by a family (90%), personal interest (77%), and career opportunities(57%), higher education (51%), and the school where they are presently enrolled (49%). The study concludes that the graduating secondary students are interested in the following career choices in descending order: Tourism and Culinary Arts, Education, Business, Engineering, Science and Technology, Medical and Health Care, Arts and Design, Communication and Information Services, and Technical Courses. Results of this study may serve individuals who are involved in teaching or managing secondary schools in terms of strengthening the curriculum and instructions to provide career needs of graduates.
Students’ Learning Experiences and Preference in Performing Science Experiments Using Hands-on and Virtual Laboratory
Authors: Bugarso John Marc S. , Cabantugan Ramel E. , Tapiculin Que-ann D. , Malaco Amera C.
Published: January 2022

This study investigated the hands-on and virtual laboratory learning experiences and laboratory preference of 91 students in performing science experiments. This study utilized a descriptive-correlation research design. The study revealed that students had positive learning experiences towards hands-on laboratory in terms of thinking, understanding, performing, and reasoning than in the virtual laboratory. Moreover, most of them highly preferred hands-on laboratories in terms of learning environment, motivation and enjoyment, stimulation of active learning, comfort, and convenience. The students’ preferences in the different laboratory settings were significantly different. Hence, there was a moderate correlation between students’ learning experiences and their laboratory preference in the hands-on laboratory. Meanwhile, there was a strong correlation between these two variables in a virtual laboratory. It is recommended to the educational institutions to enhance and strengthen their supports through providing complete laboratory facilities to the schools. Additionally, the teachers should continuously integrate laboratories to support the theoretical understanding of students in various science lessons. Importantly, the teachers and students should be innovative in performing experiments especially due to the limited instructional resources in this time of new normal.
RAGAM BUDAYA PENGGUNAAN PIRANTI SUMPIT MASYARAKAT BANDUNG
Authors: SELVIA SELVIA
Published: January 2022

Food is an inseparable part of a culture and serves as one of the characteristic markers of a culture or ethnic groups. The arrival and presence of the Chinese ethnic group has contributed to the diversity of the Indonesian culture in general. One of Chinese dishes that have become a favorite delicacy in Bandung is noodles, a wide variety of which is
sold in various areas around the city. Noodles are considered as a substitute for daily staple food and have become part of Indonesian identity in general. This field study used the descriptive qualitative method. Data collection was carried out through interviews and observations using the purposive sampling method. The purpose of this study is to determine the various ways Bandung people use chopsticks when consuming noodle. Results show that most Bandung people consumed noodles using spoons and forks. Their lack of understanding of the philosophy of noodles and chopsticks results in an inappropriate noodle-eating etiquette.
Quality Control Study of Different Products from Famotidine Tablets in the Iraqi Market
Authors: Jassem Nizar
Published: January 2022

Background: In developing countries, particularly in Iraq, the use of generic medicines has been increasing in recent years, primarily as a cost-saving measure in healthcare provision. In the Iraqi market, famotidine tablets are available from different pharmaceutical companies. As a result, regular pre-marketing quality testing is required to check the quality and identify which product might safely substitute the innovator product in the event of the innovator brand's unavailability or high cost.
Objective: various quality control tests have been conducted to determine the Pharmaceutical Equivalence of the different generic and brands of Famotidine film-coated tablets marketed in Iraq.
Materials and Methods: Four different samples of the most commonly available Famotidine 20 mg tablets in the Iraqi market were tested for drug contents, friability, and hardness. Additionally, the in-vitro drug release and kinetics were evaluated.
Results: slight differences in the products’ content were found; however, they were within the acceptable requirement of British Pharmacopeia (BP) and The United States Pharmacopoeia (USP) 30, NF 25. Similarly, the friability and hardness were within the excellent range according to the B.P. and USP. The results of our study indicated that the tested brand (Famodin) and the three generic products (Famosam, Ulceran, and Famodar) of Famotidine tablets have a unique pattern of in-vitro release profiles. However, all the tested brands and generic pills complied with the USP specifications for the immediate release dosage forms except for Famosam. Release kinetic for the four tested products indicates first-order kinetic models.
Conclusion: The findings revealed that nearly all of the tested Famotidine tablet brands and generics met the pharmacopeial requirements for oral tablets. As a result, if acquiring the innovative brand of famotidine tablets is difficult to obtain, healthcare providers may be advised to use the tested products instead.
Qualitätskontrolle texturierter Kunststoffoberflächen
Authors: Michaeli Walter , Berdel Klaus
Published: January 2022

Bedruckte oder geprägte Kunststoffoberflächen sind insbesondere in der Möbel- und Autoindustrie beliebte Dekorelemente. Mit den verfügbaren Bildverarbeitungssystemen ist nur die Inspektion unstrukturierter Folien möglich. Bei unregelmäßigen Texturen, wie zum Beispiel Kunstleder oder Holzimitat, können diese Systeme die Fehlstellen nicht von der gewünschten Textur unterscheiden. Durch die Verwendung von Texturanalysealgorithmen wird auch für diese Produkte eine durchgängige Qualitätskontrolle möglich. Die Fehlstellen können in Echtzeit detektiert und klassifiziert werden.
Holistic Workspace - Den Leitstand der Zukunft gestalten!
Authors: Schwarz Tobias , Oortmann Holger , Reiterer Harald
Published: January 2022

Vor dem Hintergrund der zunehmenden Komplexität der Mensch-Maschine-Schnittstelle in der Arbeitsumgebung von Leitwartenoperatoren stellt der textdata eine domänenübergreifende Nutzungskontextanalyse vor: Was wird wann, wie und warum benutzt beziehungsweise sollte benutzbar sein? Auf Basis der erhobenen Daten werden neue Möglichkeiten entwickelt, um die Arbeitsumgebung von Operatoren zu optimieren. Die Konzepte berücksichtigen gleichermaßen die Gestaltungsebenen der Interaktion, der sozialen Kommunikation, die Unterstützung der Workflows sowie die physische Arbeitsumgebung.
Selbsterklärende Geräte
Authors: John Dirk , Danzer Benjamin , Riedl Matthias , Zipper Holger
Published: January 2022

Aktuelle Integrationstechnologien reichen noch nicht aus, um Feldgeräte automatisch zu parametrieren. In diesem Beitrag wird ein neuer Ansatz vorgestellt – basierend auf den Anforderungen an die Feldgeräte, die bereits im Engineering und bei der Gerätewahl entstehen. Die Basis dafür stellen existierende Klassifikationssysteme dar. Die Abbildung von diesen Systemen auf die eigentlichen Parameter der Feldgeräte wird direkt in den Gerätebeschreibungen definiert. Diese werden direkt vom Gerätehersteller bereitgestellt und sind daher der ideale Ort für zusätzliche semantische Information. Der Ansatz ist kompatibel zu bestehenden Geräten und Gerätebeschreibungen und erlaubt eine schrittweise Unterstützung von Klassifikationsmerkmalen.
Prozesssimulation im Automatisierungssystem
Authors: Seitz Matthias
Published: January 2022

Höhere Anforderungen an die Anwendersoftware von Automatisierungssystemen verursachen wachsende Kosten für Programmierung, Simulation und Test. Teure Rezeptpakete und Simulationswerkzeuge unterstützen zwar die Softwareentwickler, lohnen sich jedoch zeitlich und finanziell nur für große Projekte. Dieser Beitrag untersucht, wie die wichtigsten Fähigkeiten dieser Systeme mit Bordmitteln der Automatisierungssysteme selbst nachgebildet werden können. Um eine solche kostengünstige Lösung für kleinere Projekte anzubieten, werden Funktionsbaustein-Bibliotheken entwickelt, die auf den Grundlagen von Rezeptfahrweise und objektorientierter SPS-Programmierung basieren.
Trainingssimulation in der Prozessindustrie
Authors: Schulze Karsten
Published: January 2022

Der Beitrag stellt eine Umfrage des Namur Arbeitskreises 2.2 vor, mit der untersucht wurde, wie die Prozessindustrie im deutschsprachigen Raum Trainingssimulatoren einsetzt. Die Ergebnisse sprechen für eine Akzeptanz der Trainingssimulation. Sie zeigen aber Unsicherheiten bei der Implementierung und den Möglichkeiten dieser Systeme über den gesamten Lebenszyklus einer Anlage auf. Vom Autor werden die Ergebnisse erörtert, der didaktische Kontext beleuchtet und Schlussfolgerungen für die betriebliche Praxis gezogen.
Nichtlineare modellprädiktive Regelung auf SPS
Authors: Käpernick Bartosz , Graichen Knut
Published: January 2022

Die modellprädiktive Regelung ist ein modellbasiertes Regelungsverfahren, das sich gut für die Regelung nichtlinearer Systeme mit Beschränkungen eignet. Es basiert auf der Lösung eines dynamischen Optimierungsproblems und ist in der Regel mit einem erheblichen numerischen Aufwand verbunden. In diesem Beitrag wird ein effizientes Verfahren diskutiert, das sich zur Regelung von nichtlinearen Systemen mit Stellgrößenbeschränkungen und Abtastzeiten im Millisekundenbereich auf einer speicherprogrammierbaren Steuerung (SPS) verwenden lässt. Ein experimenteller Aufbau eines Laborkrans demonstriert die Leistungsfähigkeit des Verfahrens.
OPC UA für Industrie 4.0
Authors: Deiretsbacher Karl-heinz , Mahnke Wolfgang
Published: January 2022

Die Kommunikation bei Industrie 4.0 wird nicht mehr auf reinen Daten, sondern auf dem Austausch semantischer Information basieren. Darüber hinaus wird die Übertragungssicherheit eine herausragende Bedeutung haben. Diese Aufgabenstellungen sind Kernpunkte der OPC Unified Architecture (OPC UA). OPC UA enthält eine Beschreibungssprache und die Kommunikationsdienste für Informationsmodelle. Der Beitrag beschreibt, warum dieser Standard universell nutzbar ist. Er kommt bereits in Anwendungsdomänen wie Fertigungs-, Prozess-, Gebäude-, Energieautomatisierung und Condition Monitoring zum Einsatz.
Auf dem Weg zum Internet of Portals
Authors: Grossmann Daniel , Bregulla Markus , Banerjee Suprateek , Schulz Dirk , Braun Roland
Published: January 2022

Geräte und Komponenten in der industriellen Automatisierung werden zunehmend intelligenter. Als Konsequenz migrieren Dienste wie Serverfunktionen, die heute auf Steuerungs- beziehungsweise Systemebene erbracht werden, in die Geräte der unteren Ebenen. Um die daraus resultierende Komplexität in der Kommunikationsstruktur zu verringern, schlagen die Autoren eine Aggregationsarchitektur vor. Der Beitrag erläutert die einzelnen Bestandteile der Architektur und beschreibt eine prototypische Umsetzung.
IT-Security-Konzepte für die Prozessindustrie
Authors: Niemann Karl-heinz
Published: January 2022

Die Umsetzungsempfehlungen zu Industrie 4.0 sehen in der Beherrschung der IT-Sicherheit einen wesentlichen Erfolgsfaktor. Neue Sicherheitsarchitekturen werden als notwendig erachtet. Der Beitrag beschreibt die IT-Sicherheit im bisherigen Umfeld und erläutert dann die Bedingungen, die sich künftig im Kontext von Industrie 4.0 ergeben werden. Am Beispiel des Wandels von Automatisierungssystemstrukturen in der Prozessindustrie werden Anforderungen an die IT-Sicherheit definiert und neue mögliche Lösungsansätze zu deren Realisierung aufgezeigt.
Adaptive Führung eines Modulkraftwerks
Authors: Kolbe Christian
Published: January 2022

Ziel des Vorhabens, das in diesem Beitrag beschrieben wird, ist die Entwicklung eines kompakten grund- und spitzenlastfähigen Kraftwerks auf Basis regenerativer Energien und verschiedener Energiespeichersysteme. Das Kraftwerk soll autark in netzfernen Gebieten eine Strom- und Wasserstoffversorgung gewährleisten. Die besondere Innovation liegt in der neuartigen, energieeffizienten Kopplung der Komponenten, wodurch eine modulare Bauweise sowie eine bessere Optimierung auf den jahreszeitlichen Energiebedarf des Kunden und die standortspezifischen Energiequellen möglich werden. Um das autarke Kraftwerk grundlastfähig zu machen, vernetzt eine speicherprogrammierbare Steuerung (SPS) die Komponenten miteinander und ermöglicht so eine bisher unerreichte autarke Systemleistung.
Energieorientierte Prozessführung
Authors: Schäfer Stephan , Berger Ulrich , Schöttke Dirk , Kämpfe Thomas
Published: January 2022

Neben der zeitlichen Optimierung von Prozessabläufen sollten Lösungen zum Umschlag von Containern Aspekte der Ressourcennutzung und der Lastflexibilisierung berücksichtigen. Dazu eignen sich Strategien der energieorientierten Prozessführung, mit denen sich die am Prozess beteiligten Systeme gezielt beeinflussen lassen. Im Beitrag werden einige Voraussetzungen und mögliche Schnittstellen für eine energieorientierte Fahrweise erläutert. Indem das Gesamtsystem in das Engineering einbezogen wird, können – im Gegensatz zu klassischen Lastmanagementlösungen – künftige Lösungen flexibler gestaltet werden.
Redundante Kommunikation für industrielle Automation
Authors: Flatt Holger , Jasperneite Jürgen , Rauchfuß Joachim
Published: January 2022

Dieser Beitrag präsentiert die Abbildung der Redundanzprotokolle PRP, HSR in Kombination mit IEEE-1588-Zeitsynchronisation auf eine konfigurierbare CPU/FPGA-basierte RedBox-Architektur. Kernfunktionen von PRP, HSR und IEEE 1588 werden auf ein Field Programmable Gate Array (FPGA) abgebildet. Die CPU setzt Steuerungsaufgaben um. Ein optionaler Standard-Switch-ASIC stellt die direkte Kommunikation zu den Netzwerkgeräten her. Frames geringer Größe werden vom FPGA bis zu zweimal schneller weitergeleitet als bei anderen Umsetzungen. Die Uhrzeitsynchronisation der RedBoxen erfolgt auf 30 ns genau. Die RedBox kann in zeitsynchronisierte industrielle Netzwerke integriert werden, um die Zuverlässigkeit der Kommunikation zu erhöhen.
Zustandsüberwachung und Performanzprognose
Authors: Krüger Minjia , Jeinsch Torsten , Engel Peter , Ding Steven X. , Haghani Adel
Published: January 2022

Für die Prozessüberwachung und Fehlerdiagnose gibt es bereits viele datenbasierte Verfahren. Im Gegensatz zu modellbasierten Verfahren bietet der datenbasierte Ansatz die Möglichkeit, ein statistisches Modell aus historischen Daten zu ermitteln, um anspruchsvolle und hochkomplexe Industrieanlagen zu überwachen. Verfahren zur Performanzprognose von Industrieanlagen führen die Gedanken der datenbasierten Zustandsüberwachung konsequent weiter und eröffnen neue Möglichkeiten, fehlertolerante Systeme und Anlagen zu entwickeln. Es wurden unterschiedliche Industrieprozesse mittels datenbasierter Verfahren unter der Zielstellung der Fehlererkennung und -lokalisation sowie der Performanzprognose analysiert. Die Leistungsfähigkeit datenbasierter Verfahren wird anhand von Messdaten von Windkraftanlagen und einer Industrieanlage dargestellt.
Wissensbasierte Auswahl von Prinziplösungen
Authors: Riedel Maik , Fay Alexander
Published: January 2022

Die Auswahl geeigneter Prinziplösungen für Mess- und Stellaufgaben erfordert Spezialwissen, das nicht jeder Planer einer Anlage hat, zumal mit dem technologischen Wandel die Einsatzgrenzen bekannter Verfahren verschoben und neue Prinziplösungen erdacht werden. Bisherige papierbasierte herstellerneutrale Unterstützungen, wie Bücher oder Richtlinien, veralten daher schnell. Im Beitrag wird ein wissensbasiertes System vorgestellt, dessen Wissensbasis sich leicht durch Expertengremien an den aktuellen Stand der Technik anpassen lässt. Das System wurde bereits erfolgreich für die Auswahl von Durchflussmessverfahren und Antriebslösungen eingesetzt.
Smart Factory Acceptance Test
Authors: Gohr Katharina
Published: January 2022

Die Funktionsprüfung des Steuerungscodes eines Leitsystems ist integraler Bestandteil der Werksabnahme (factory acceptance test, FAT) einer Automatisierungslösung; sie wird heute weitestgehend manuell durchgeführt. Dies führt dazu, dass die Tests zeitaufwendig sind und teilweise unsystematisch ablaufen. Der erkannte Änderungsbedarf wird zwar, ebenfalls manuell, dokumentiert und entsprechend ausgeführt, ein erneuter Testdurchlauf stellt jedoch in der Regel keine Rückwirkungsfreiheit auf andere Teile des Systems sicher. Dieser Artikel stellt das Konzept Smart FAT vor, das Konzepte der Hardwareemulation sowie der Prozesssimulation verknüpft und um eine Test-Engine erweitert. Smart FAT ermöglicht es so, die das Leitsystem betreffenden Testreihen an der virtuellen Instanz automatisiert auszuführen.
Life-Cycle-bezogene Information in Industrie 4.0
Authors: Wollschlaeger Martin , Lehmann Robert , Dennert Alexander
Published: January 2022

Eine wesentliche Anforderung an Industrie 4.0 besteht in der Flexibilität der Systemstruktur. Unterschiedliche Komponenten sollen zur Realisierung der Wertschöpfungsketten mitunter temporär in Beziehung gesetzt werden. Dies erfordert insbesondere die einheitliche Bereitstellung von Life-Cycle-bezogener Information, wie Versionsstände, verfügbare Serviceleistungen und Einsatzhistorie für die Komponenten. Der Beitrag beschreibt ein grundlegendes Modell für Life-Cycle-bezogene Information und diskutiert verschiedene Repräsentationsformen, mit denen diese Information für Werkzeuge bereitgestellt wird. Ein besonderer Fokus gilt dabei der Nutzungsphase.
audiolibro como TIC para la enseñanza y aprendizaje del léxico en el aula de E/LE
Authors: Esquinas López Rosana
Published: January 2022

Los audiolibros son un recurso analizado, principalmente, en la enseñanza de inglés como lengua extranjera. Sin embargo, poco sabemos sobre su situación y uso en el ámbito de la enseñanza de español como lengua extranjera. En este artículo se presenta una reflexión teórica sobre la enseñanza de léxico desde diferentes recursos como el Marco Común Europeo de Referencia y el Plan Curricular del Instituto Cervantes, así como una revisión de las características del audiolibro y sus posibilidades como recurso TIC en el aula de E/LE para la enseñanza y aprendizaje de léxico. Además, a través de un estudio de recepción dirigido a docentes profesionales se explora su percepción sobre los audiolibros en el aula de E/LE. Esta investigación evidencia el interés por los audiolibros por parte de los docentes, así como la falta de recursos editoriales especializados y propuestas educativas que faciliten su implementación en el aula de español como lengua extranjera.
Catalytic Degradation of Chlorinated Lignin in Pulp Bleaching Wastewater over Immobilized Laccase
Authors: Zhou Xue-Fei
Published: January 2022

The aim of this study was to use molecular sieves (NaY, MCM-48, SSZ-13) and graphene oxide (GO) as supports to immobilize laccase to increase its activity and stability. A series of characterization of immobilized laccases against kinetic parameter and stability were carried out, and it was showed that the GO-immobilized laccase (Lac/GO) was better than molecular sieve-immobilized laccases (Lac/NaY, Lac/MCM, Lac/SSZ) in terms of activity and stability test using ABTS (2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) as substrate. The impacts of enzymatic catalysis on degradation of chlorinated lignin from pulp bleaching wastewater were studied through the structural characterization with 31P-NMR. Lac/GO was able to perform the most extensive oxidation of the chlorinated lignin, as demonstrated by the increase of carboxyl groups and the decrease of aliphatic hydroxyl groups. Noteworthy, significant degradation of condensed lignin substructures occurred during Lac/GO catalyzed oxidation of chlorinated lignin was observed, while the content of phenolic hydroxyl groups of chlorinated lignin substantially increased due to the cleavage of β-O-4 bonds compared to molecular sieve-immobilized laccases. It was also proved that catalytic degradation using Lac/GO as a biocatalyst is the effective method to reduce pollution load of pulp bleaching wastewater. The maximum degradation of chlorinated lignin in pulp bleaching wastewater was achieved with the degradation rate of chlorinated lignin of 88.6% at 5.0 g/L Lac/GO dose, 50 °C, 4 h, pH 5.0. The removal of COD, TOC, and colour was 86.2, 85.8 and 92.2%, respectively.
Electrochemical Degradation of Methylene Blue using Ce(IV) Ionic Mediator in the Presence of Ag(I) Ion Catalyst for Environmental Remediation
Authors: Henry Setiyanto Henry Setiyanto , Feni Mustika Sari Feni Mustika Sari , Muhammad Yudhistira Azis Muhammad Yudhistira Azis , Ria Sri Rahayu Ria Sri Rahayu , Sulaeman Amminudin , Zulfikar Muhammad Ali , Ratnaningrum Diah , Saraswaty Vienna
Published: January 2022

Methylene blue (MB) is often used in textile industries and is actively present in the wastewater runs-off. Recently, mediated electrochemical oxidation (MEO) offers a fast, reliable and promising results for environmental remediation. Thus, we aimed to evaluate the electro-degradation potential of MB by MEO using Ce(IV) ionic mediator. Furthermore, we also observed the influence of addition Ag(I) ion catalyst in MEO for degradation of MB. The electro-degradation of MB was evaluated by cyclic voltammetry technique and was confirmed by UV-Vis spectrophotometry, high performance liquid chromatography (HPLC) analysis and back-titration analysis. The results showed that in the absence of Ag(I) ion catalyst, about 89 % of MB was decolorized within 30 min. When 2 mM of Ag(I) ion catalyst was applied, the electro-degradation of MB was increased to maximum value of 100%. The UV-Vis spectrum confirmed the electro-degradation of MB as suggested by decreased maximum absorbance value at λ 668 nm from 2.125 to 0.059. The HPLC analysis showed the formation of five new peaks at retention time of 1.331, 1.495, 1.757, 1.908, and 2.017 min, confirming the electro-degradation of MB. The back-titration analysis showed about 52.9% of CO2 was produced during electro-degradation of MB by MEO. More importantly, more than 97% of Ce(IV) ionic mediator were recovered in our investigation. Our results showed the potential of MEO using Ce(IV) ionic mediator to improve the wastewater runs-off quality from textile as well as other industries containing methylene blue.
The Prevalence of Cytomegalovirus (CMV) Infection among Infants and Correlation between CMV PCR with Clinical Outcomes in a Tertiary Teaching Hospital in Malaysia
Authors: Abdul Hamid Norjihan , Ismail Nabilah , Muhd Besari @ Hashim Alwi , Mohamad Suharni , Salmuna Zeti Norfidiyati
Published: January 2022

Congenital cytomegalovirus (cCMV) infection is the leading infectious cause of congenital hearing loss and neurodevelopmental disability. This study aimed to describe the prevalence and clinical manifestations of infants age 12 months and below with CMV infection in Hospital Universiti Sains Malaysia (Hospital USM) and to determine the correlation between CMV PCR with clinical outcomes. A total of 648 hospitalized infants with clinically suspected cases of cytomegalovirus infection admitted to Hospital USM from January 2018 to December 2018 were tested for anti-CMV IgM and IgG by electrochemiluminescence immunoassay method. The results suggestive of CMV infection were requested for the second serum sample at 2-4 weeks’ interval together with plasma samples for CMV DNA viral load quantification by real-time PCR and maternal sample for serological analysis. Correlation of CMV viral load with clinical outcomes was analyzed using the point- biserial correlation. The results showed that the prevalence of acute CMV infection was 6.48 % (42/648) and cCMV infection was 0.3% (n=2/648). The findings were as follows: acute CMV infection (n = 42), passive immunity (n = 113) and inconclusive (n =41).) CMV hepatitis (p-value= 0.018), rash (p-value= 0.043), presumed sepsis (p-value=0.044) and abnormal hearing (p-value 0.031) were significantly associated with CMV status. Significant moderate correlation between CMV viral load and abnormal hearing assessment was observed. As a conclusion, CMV hepatitis, presumed sepsis, rash, and abnormal hearing were associated with the infant's CMV status. A significant correlation was found between CMV viral load and abnormal hearing.
A Safety Evaluation of Intravenous Administration of ex vivo Expanded Human Peripheral Blood-Derived NK Cells: A Preclinical Study
Authors: Gounder Sellamuthu Subbanna , Subramani Baskar , Mohd Radzuanb Nur Ezzati Izyan Binti , Mohamad Sait Nurhidayah Bt , Mohd Zain Farah Dalila Binti , Abdullah Basri Johan Jeet
Published: January 2022

The use of natural killer (NK) cells in the treatment of various cancers is emerging as a promising approach in adoptive immunotherapy. However, the safety of ex vivo activated and expanded cells in in vivo conditions remain unknown. In this study, the toxicity of NK cells was evaluated at different doses, with 5 × 106, 20 × 106 and 50 × 106 cells injected intravenously into pre-irradiated (30Gy) immunodeficient mice twice a week for three weeks and the mice were followed-up on for 90 days. Throughout the study, no mortality, abnormal clinical signs, or behavioural changes related to the testing material were observed in either the treated or control groups of mice. There were no significant variations in food and water consumption between both genders in the NK cell treated and control groups. However, certain significant changes were observed between the groups in the clinical biochemistry and urine analysis reports. As autopsy showed no significant variations in absolute and relative organ weights between the groups, except for the livers of the treated mice. The histopathological analysis also demonstrated that there were no significant abnormalities in most of the organs of both genders, except for the liver. Some necrotic lesions were observed in the livers of both the treated and control mice, and these lesions may be due to the effects of irradiation or could be common in NOD.SCID mice. The findings of this study indicate that intravenous administration of NK cells is safe and does not cause any adverse effects up to the dose of 50 × 106 cells/mouse.
Evaluation of the Male and Female Fertility and Teratogenic Effects of Lignosus rhinocerotis (Cooke) Ryvarden in Rats
Authors: Hamzah Zati Bayani , Mohd Rosdan Bushra Solehah , Abdullah Nurul Asma , Mohd Fuad Wan Ezumi
Published: January 2022

Lignosus rhinocerotis (Cooke) Ryvarden (LR) or tiger milk mushroom has traditionally been used in Malaysia due to its abundant medicinal properties. The potential effects of LR on the male and female fertility and teratogenicity were investigated on rats. Male Sprague Dawley (10 rats/group) were orally administered with 0, 250, 500 and 1000 mg/kg/day of LR extract for 30 consecutive days. Female (5 rats/group) received the same treatment beginning the dioestrus of pre-mating, through mating periods and continuously up to day 20 of pregnancy while the rest of the females (5 rats/group) were left untreated. Evaluation on general health, behaviour, body weight and organ weights; reproductive and internal organs were carried out. Male fertility parameters such as the reproductive performance and hormones as well as sperm analysis were examined. Maternal gross assessment at autopsy and detailed foetal examination were conducted to determine the teratogenicity. The findings obtained on the male animals showed that no significant deleterious effects on the general health, body weight, reproductive and visceral organs weight, reproductive performance, hormones and sperm analysis of up to 1000 mg/kg/day daily doses of LR. Foetal parameters and gross examination of pregnant dams at autopsy showed that the extract did not affect the fertility of the rats and teratogenicity of the litters. Our findings showed that no treatment-related toxicity on the fertility of male and female rats in all groups following LR treatment. The herbal extract also did not result in teratogenic effects on the offspring of the treated dams.
Covid-19 Salgını ile İlgili Paylaşımlar Üzerinde Veri Analizi
Authors: TUNA Nur , SEBATLI SAĞLAM Aslı , ÇAVDUR Fatih
Published: January 2022

Tüm Dünya’yı etkisi altına alan Covid-19 salgını, Twitter sosyal medya platformunda salgın ile ilgili konularda büyük veri kümelerinin oluşumuna sebep olmuştur. Oluşan bu veri kümeleri, toplumun konuya yaklaşımını belirlemek adına veri analiz çalışmaları için zengin bir veri kaynağı teşkil etmektedir. Bu çalışmada, Covid-19 salgını ile ilgili Twitter paylaşımları üzerinde R programlama dili kullanılarak çeşitli veri analizleri yapılmıştır. Bu uygulamalar genel olarak metin analizi, ağ analizi ve duygu analizi şeklinde sınıflandırılabilir. Çalışmada, “#covid19”, “#covid-19” ve “#coronavirus” etiketlerine sahip İngilizce dilinde 09.12.2020 ve 20.03.2021 tarihleri arasında yapılan 110.883 paylaşım toplanarak temizlenmiştir. Çalışma kapsamında yapılan analizlerde, konu ile ilgili en çok paylaşım yapılan kullanıcı lokasyon bilgileri, birlikte en sık kullanılan kelime ve kelime çiftleri ile olumlu ve olumsuz kelimeler tespit edilmiştir. Yapılan çalışmanın, toplumun sosyal medyada paylaştığı çeşitli fikir ve düşüncelerinin hangi yönde olduğunu görmek açısından önemli olduğu düşünülmektedir. Elde edilen sonuçlar incelendiğinde, insanların duygu ve düşüncelerinin yanı sıra, ihtiyaç ve beklentilerini de sosyal ağlar aracılığıyla dile getirdiği görülmüştür. Ayrıca Twitter sosyal medya platformunun toplumu etkileyen güncel olaylar hakkında anında bilgi almak amacıyla kullanılabilecek olan en önemli sosyal ağlardan biri olduğu bir kez daha anlaşılmıştır.
Göçün Kültürel Yozlaşımı ve Yıkımı: “Taşı Toprağı Altın Şehir” Filminin İkili Karşıtlıklar Yöntemiyle Çözümlenmesi
Authors: SALMAN Semih , DEMİREL Gökhan
Published: January 2022

Bir yerden başka bir yere kalıcı olarak taşınmayı ifade eden göç, kavramsal olarak, mekânsal değişikliği ifade etse de aynı zamanda kültürel, ekonomik, politik ve ahlaki boyutları açısından oldukça önemli bir olgudur. Hem göç veren hem de göç alan mekânların sosyal dinamiklerinde değişimler yaratmaktadır. Sosyal uyum politikaları, kültürel adaptasyon ve ekonomik işbirlikleriyle minimalize edilebilen göçün olumsuz etkileri, başarılamadığında tam tersi bir etki yaratarak hem göçmenlerde hem de kentlerde bozuma neden olabilmektedir. Kent-kır çatışmasının yaşanmasına neden olan bu bozum, çoğunlukla ahlaki yönde gerçekleşmektedir. Bu çalışma kapsamında, Türk sinemasında göç olgusunun öneminden hareketle Taşı Toprağı Altın Şehir filmi, Lévi-Strauss’un ikili karşıtlıklar yöntemiyle çözümlenmektedir. Söz konusu film, Lévi-Strauss’un ikili karşıtlıklar modelini temsil eden somutlama mantığı çerçevesinde analiz edilerek, kır-kent ayrımı ve göç olgusu, filmin anlatı yapısı üzerinden detaylı olarak analiz edilmektedir. Elde edilen bulgulara göre; kır, beklenildiği üzere temiz ve bozulmamış değilken, kentler ise beklenildiği gibi kirli ve bozulmuş değildir. Kentler yapıbozum ve ahlaki çöküşün nedeni değil, sadece mekânı olarak ortaya çıkmıştır. Kır-kent arasındaki temel ayrım, büyük oranda fırsat ve fırsatların değerlendirilme biçiminde yatmaktadır. Kent, kırsala oranla insanların karakter değişimlerine zemin hazırlayacak daha fazla ortam sunmaktadır.
Covid Döneminde Radikalleşen Zaman ve Mekân: İletişim Araçları Örneği
Authors: AL Eyüp
Published: January 2022

Bu makalenin amacı, Covid dönemi boyunca tecrübe edilen zamanın ve mekânın teknolojik determinist perspektiften hareketle, sosyolojik bir okumasını gerçekleştirmektir. Zaman ve mekân insan açısından yaşamın en temel unsurlarından biri olmasına rağmen tarihin her döneminde deneyimlenme biçimleri itibariyle değişiklikler göstermektedir. Bu bağlamda tarihsel açıdan farklı bir dönem yaşanmaya başlamış ve yaşanmaya devam edilmektedir. İçinde bulunulan dönemi tanımlayan ana unsur makale boyunca Covid olmakta ve Covid’in neden oldukları iletişim araçları örnekleminde, içeriğe değinilmeden teknolojik determinist bir bakış açısıyla sosyolojik analize tabi tutulmaktadır. Analizin çerçevesini oluşturan sosyolojik yaklaşım doğrultusunda iletişim araçlarının insanın deneyim alanını zaman ve mekân ölçeğinde nasıl radikalleştirdiği incelenmektir. Teknolojik determinizm gereği herhangi bir iletişim aracının içeriği yerine bu araçların ortak kodlarına değinerek betimleyici bir yaklaşım sergilenmektedir. Çalışma boyunca zaman ve mekân pratiklerinin analizinde Anthony Giddens, David Harvey ve Stephen Kern gibi düşünürlerden beslenilmekte ve Covid dönemi öncesinden tamamen ayrılan yeni bir zamanın ve mekânın deneyimlenmediği iddia edilmektedir. Bu çalışmada Covid döneminde zamanın ve mekânın toplumsal açıdan belirli değişimler yaşadığı bilinmekle birlikte hem zaman hem de mekân için net sınırlar çizmek yerine belirsizleştirilmiş bir iletişim ağının ve pratiğinin oluşturulduğu sonucuna varılmıştır.
Twitter Diplomasisi Üzerinden Türkiye-İran İlişkilerini Anlamak: Erdoğan ve Ruhani Dönemleri (2013-2021)
Authors: SAYIN Yusuf , AVCI Sümeyra , CANDAN Muhammed
Published: January 2022

Teknolojideki gelişmeler gündelik yaşamın her alanını etkilediği gibi uluslararası ilişkileri ve diplomasi alanlarını da etkilemiştir. Sosyal medya yeni bir diplomasi alanı olarak kendini göstermiştir. Twitter, sosyal medya platformu olarak hayatın her alanında iletişim aracı olarak kullanılmaya başlanmıştır. Diplomasi ve devletlerarası siyasi ilişkiler de Twitter’ın sağladığı kolaylaştırıcı ve karşılıklı etkileşimi sağlayıcı karakteristiğinden nasibini almıştır. Bu çalışmada, Twitter diplomasisi (Twipdiplomasi) üzerinden Türkiyeİran ilişkileri anlaşılmaya ve analiz edilmeye çalışılmış; Erdoğan-Rouhani dönemlerinde (2013-2020) sanal bir diplomasi platformu olarak Twitter üzerinden yapılan paylaşımlarla ikili ilişkiler analiz edilmeye çaba gösterilmiştir. Türkiye ve İran cumhurbaşkanları, dışişleri bakanları ve bakanlıklar arasında gerçekleşen belli başlı bazı yazışmalar incelenmiş; söz konusu kişi ve kurumların Twitter mecrasında yer alan söylemleri üzerinden Türkiye-İran ilişkileri açıklanmaya çalışılmıştır. Çalışma, 7 yılı kapsayan paylaşımlar arasından 13 Tweet seçilerek gerçekleştirilmiştir
Sisyphos’un Kadınları: Türk Sinemasında Beslemeler
Authors: BALCI Şeyma
Published: January 2022

Osmanlı İmparatorluğu’ndan itibaren varlık gösteren daha çok evlatlık, beslemelik olarak adlandırılan ve çoğunluğu kadınlardan oluşan sömürüye açık uygulama, köleliğin biçim değiştirmiş hâlidir. Ne Osmanlı İmparatorluğu ne de Cumhuriyet Türkiye’si bu sömürü düzenini denetler. Beslemeler, hem roman hem de filmlerde kendini gösterir. Sinema söz konusu olduğunda patetik hikâyelerin merkezinde genellikle köyden kente getirilen, alt sınıf yoksul aileleri tarafından para ile küçük yaşta satılan beslemeler, her zaman “öteki”dir. Bir adım ilerisi beslemeler medar-ı suçtur. Köylü ve pis olarak görülen beslemelerin eve geldikleri an “bitli” oldukları gerekçesiyle saçları kesilir, üstlerindeki kıyafetler yakılır. İsimleri de değiştirilen beslemelerin ev işleri hiç bitmez. Ev işinin “görünmez emeği” gibi sabahtan akşama kadar çalışan beslemeler, bu işten herhangi bir ücret almaz. Cinsellikleri ev emeği gibi her zaman sömürüye açık olan beslemelerin kötü son yaşaması kaçınılmazdır. Bu son genellikle de tecavüz olur. Türk sinemasında beslemeler Aşkın Saati Gelince (Nejat Saydam, 1961), Kanlı Nigâr (Ülkü Erakalın, 1968), Kınalı Yapıncak (Orhan Aksoy, 1969), Kopuk (Vedat Türkali, 1972), Açlık (Bilge Olgaç, 1974), Cihan Yandı Kanlı Nigâr (Memduh Ün, 1981), Fazilet (İrfan Tözüm, 1990), Asılacak Kadın (Başar Sabuncu, 1990), Kız Kardeşler (Emin Alper, 2019) filmlerinde varlık kazanır. Türk sinemasında beslemelerin nasıl temsil edildiğini irdelemeyi amaçlayan bu çalışmada saptanan özellikler doğrultusunda içerik analizi yöntemi kullanılmıştır.
Numerical solution of a singular integral equation related with a dynamic contact interaction problem
Authors:   National University «Odesa maritime academy», Popov V. G. , Kyrylova O. I. ,   National University «Odesa maritime academy»
Published: January 2022

A singular integral equation with a fixed singularity to which the problem of contact interaction of two quarters of spaces in the conditions of harmonic oscillations of longitudinal shear is reduced is considered. A quarters of the space is situated so that the half-space composed of them has a stepped boundary. In the contact area, the conditions for ideal coupled are satisfied. The unknown function in this equation is the contact stresses. For the numerical solution of this equation, a method that takes into account the asymptotic behavior of contact stresses at the edge point is proposed. The basis of this method is the use of special quadrature formulas for singular integrals obtained in the article. When obtaining these formulas, the unknown function was approximated by an interpolation polynomial, in which the roots of the Laguerre polynomials are the points of interpolation. The values of the unknown function at the interpolation points are found by the collocation method, herewith the collocation points of collocationare the roots of the special function. An approximate formula for calculating contact stresses can have practical application. The effectiveness of the proposed method is demonstrated by the numerical example.
Damped steady-state resonant sloshing in a container of circular cross-section for arbitrary periodic nonparametric forcing
Authors:   Institute of Mathematics of the NAS of Ukraine, Raynovskyy I. A. , Timokha A. N. ,   Centre of Excellence "Autonomous Marine Operations and Systems"
Published: January 2022

Nonlinear modal Narimanov-Moiseev—type equations are investigated to study resonant sloshing in a vertical cylindrical tank. The tank moves periodically in the space with the forcing frequency close to the lowest natural sloshing frequency. We show that the considered sloshing problem can to within the higher-order asymptotic terms be reduced to the case of orbital tank motions in the horizontal plane. Analytical solutions of the secular system which couples the dominant amplitudes of the steady-state sloshing are analytically solved. Effect of viscous damping is accounted. The results are compared with experimental measurements conducted by diverse authors for longitudinal and circular orbital tank excitations. A parametric analysis of the amplitude curves is done to clarify how the steady-state wave regimes and their stability change versus the forcing frequency and the semi-axes ratio of the elliptic orbit. The main result consists of confirming the experimental disappearance of the counter-directed swirling wave mode (relative to the elliptic orbit direction) when passaging to the circular orbit.
Computational method for solving boundary problems of the theory of elasticity using non-orthogonal systems of functions
Authors:   Pistryhach Institute for Applied Problems of Mechanics and Mathematics, NAS of Ukraine, Revenko V. P.
Published: January 2022

A complete system of functions based on non-orthogonal sinuses and cosine was constructed. It has been proven that the continuous function can be approximated by a finite number of non-orthogonal functions in such a way that this amount does not enter the selected function of the non-orthogonal base. The numerical experiment confirmed the high accuracy of approximations of continuous functions by a small number of non-orthogonal functions. The flat problem of the theory of elasticity for the plate with variable elastic characteristics is considered. This equation is simplified when the characteristics of the material change insignificantly depending on the spatial coordinates. A new method of solving a boundary value problem has been developed for the fourth-order equation with variable coefficients. The proposed method is based on the separation of the stress state of the plate from an inhomogeneous material to the main and indignant state, the use of complete systems of non-orthogonal functions and a generalized quadratic form. A criterion under which the constructed approximate decision coincides with the exact solution was found.
On the problem of calculating shear deformations in prismatic bars made of polymer materials under tension with torsion
Authors:   S.P. Timoshenko Institute of Mechanics NAS Ukraine, Reznik V. S. , Ushakov O. V. ,   Ukrainian scientific and research Institute of special equipment and forensic expertise of the Security Service of Ukraine, Gorun O. Y. ,   Ukrainian scientific and research Institute of special equipment and forensic expertise of the Security Service of Ukraine
Published: January 2022

The process of creep of prismatic rods made of linear-viscoelastic polymeric materials under combined loading is considered. Defining equations that determine the relationship between strains, stresses and time are given in the form of a superposition of shear and bulk strain. The object of study is prismatic bars made of fiberglass ST-1. The area of linearity of the model is substantiated on the basis of the hypothesis of the existence of the creep function, which is built on the yield curves, a single diagram of long-term deformation and the statistical value of the quantile of statistics. The region of linear-elastic deformation is recognized based on the fulfillment of the condition of existence of a single creep function. The defining equations of the model contain a set of functions and coefficients determined from the basic experiments. On the basis of the relations between the kernels of the one-dimensional stress state, the parameters of the kernels under the condition of a complex stress state are determined. The linearity of viscoelastic properties is given by the Boltzmann-Voltaire equations. The fractional-exponential kernels of heredity are chosen as the kernels of heredity. The obtained values of the core parameters are used to calculate the creep deformations of prismatic bars made of ST-1 fiberglass under conditions of simultaneous tensile tension.
Self-organized Au-GaAs metal-semiconductor micro- and nanostructures for applications in plasmonic photovoltaics
Authors:   Taras Shevchenko national University of Kyiv, Dmitruk I. M. , Berezovska Nataliya ,   Taras Shevchenko national University of Kyiv, Maiko K. O. ,   Taras Shevchenko national University of Kyiv, Mamykin S. V. ,   V.Ye. Lashkaryov Institute for Physics of Semiconductors, NAS of Ukraine, Mamontova I. B. ,   V.Ye. Lashkaryov Institute for Physics of Semiconductors, NAS of Ukraine
Published: January 2022

Au-GaAs metal-semiconductor composite microstructures have been prepared by an anisotropic etching of n-GaAs (100) wafers doped with Te (1016 to 1017 cm-3) with subsequent photostimulated chemical deposition of noble metal (Au) on formed semiconductor quasigratings. The microrelief topology of GaAs surface is controlled by the anisotropic etching conditions. Au metal was deposited on the structured GaAs surface as randomly placed nanoparticles of various shape and size and/or nanowires on the top of the hills of formed semiconductor microstructure. As the number of Au nanoparticles increases, they tend to localize on the ledges of the GaAs microrelief forming a system of approximately parallel nanowires. Obtained periodic structures with submicron to microns periods without Au nanoparticles and with deposited nanoparticles have been studied by means of scanning electron microscopy, optical spectroscopy (photoluminescence spectroscopy at room temperature), and photoelectric measurements. The decrease of the relative intensity of main photoluminescence band for samples with Au nanostructures compared to ones without nanoparticles deposition and simultaniously changes of the shape of photocurrent spectra of Au-GaAs microstructures have been observed. Such correlation in behaviour of measured spectra make formed Au-GaA metal-semiconductor microstructures perspective for the application in plasmonic photovoltaics.
The Effects of Hot Yoga on Kidney Function: An Observational Pilot and Feasibility Study
Authors: Bordman Risa , Meaney Christopher , Telner Deanna
Published: January 2022

Yoga has been shown to have health benefits, whereas exercising in a hot environment has deleterious effects on kidney function. There are no long-term studies on the physiological effects of hot yoga. The purpose of this study was to investigate changes in renal function acutely and over time between practitioners of hot and non-hot yoga. Urine and capillary samples were collected for urinalysis, albumin-creatinine ratio, and serum creatinine at yoga studios preand postexercise over 1 year. Thirty-two participants in non-hot yoga and 19 participants in hot yoga were recruited. Difference in blood capillary creatinine (post-yoga minus pre-yoga) showed a 7.52 μmol/L (SD 11.46) increase for practitioners of hot yoga and a 4.07 μmol/L (SD 9.94) increase for practitioners of non-hot yoga, with a between-group difference of 3.45 μmol/L (95% CI −0.42, 7.32; p = 0.08). Over 1 year, the mean difference in blood capillary creatinine for the hot group increased by 0.91 μmol/L (SD 11.00) and by 3.08 μmol/L (SD 9.96) for the non-hot group, with a between-group difference of −2.17 μmol/L (95% CI −10.20, 5.86; p = 0.58). Over 1 year, the mean difference in albumin-creatinine ratio for the hot group was −0.16 mg/mmol creatinine (SD = 0.74); for the non-hot group the difference was −0.20 mg/μmol (SD = 0.80). The difference in difference between the hot and non-hot groups was 0.04 mg/μmol (95% CI −0.60, 0.68; p = 0.90). Urine collected for urinalysis could not be analyzed due to too many 0 values. This pragmatic observational study did not find a statistically significant change in renal function between participants in non-hot and hot yoga either acutely or over 1 year. A larger and longer study focusing on blood creatinine over time would help to inform the long-term effects of hot yoga on the kidneys.
Short-range order in Fe-Cr alloys irradiated with electrons at low temperatures and cr solubility in α-iron near 270 K
Authors:   M.N. Miheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Nikolaev A. L.
Published: January 2022

Chromium has limited solubility in -iron. It is shown that unsaturated Fe-Cr alloys should demonstrate short-range ordering (i.e. tendency to neighboring of Fe and Cr atoms). The type of short-range ordering in several Fe-Cr alloys is revealed from the data on the recovery of residual electrical resistivity after low temperature electron irradiation at sufficiently low temperatures. The combined consideration of the data on short-range ordering and chromium solubility at 570 K (Scr. Mater. 2014 v. 74, p. 48 and ibid 2016 v. 122, p. 31) gives the confidence interval for the solubility limit near 270 K equal to 8.8±0.4 at. % Cr.