bluuebunny/crossref_metadata_2025 huggingface dataset:
Reale Daten für Simulationen im digitalen Zwilling*/Real data for simulation in the digital twin -Study on how to record Profinet data and reproduce them in complex simulation environments
Authors: Chemnitz M. , Heimann O. , Vick A.
Published: June 2021

Die hohen Anforderungen an moderne Fertigungssysteme erfordern leistungsfähige Engineering-Lösungen. Wie man die Identifikation von Fehlerursachen in komplexen Anlagen erleichtert, wurde in einer Machbarkeitsstudie des Fraunhofer IPK im Auftrag von Siemens DI FA untersucht. In der vorgestellten Lösung werden die Daten der Anlage auf Feldbusebene erfasst und in den digitalen Zwilling eingespeist. So kann das Verhalten der Komponenten taktgenau nachvollzogen werden. Dies elaubt einen tiefen Einblick in das System und unterstützt so bei der Fehlerbehebung.

 

Powerful engineering tools are required to keep modern production systems manageable. Siemens DI FA and the Fraunhofer IPK present a novel tool for root cause analysis within complex manufacturing systems. The solution combines a CAx plant model with control data recorded from the field bus. This creates a comprehensive digital twin, allowing to analyse past machine behavior with bus clock resolution.
Agile Montage*/Agile assembly – Assembly planning and assembly system as integral elements of factory planning
Authors: Burggräf P. , Dannapfel M. , Adlon T. , Riegauf A. , Müller K. , Fölling C.
Published: June 2021

Produzierende Unternehmen intensivieren aufgrund zunehmend volatiler Kundenbedürfnisse die Anwendung agiler Produktentwicklungsansätze. Ziel des Beitrags ist die Einführung eines Konzepts zur Befähigung dieser dynamischen Produktentwicklung in der Montage. Der integrative Lösungsansatz basiert auf der wirtschaftlichen Optimierung des Agilitätsgrades von Montagesystemen sowie dem selektiven Einsatz agiler Methoden in der traditionell plangetriebenen Montageplanung als Teil der Fabrikplanung.

 

To meet more volatile customer needs, manufacturing companies increasingly make use of agile product development approaches. This article aims to introduce a concept to enable for dynamic product development in assembly. This integrative solution approach is based on the economic optimization of the degree of agility of assembly systems and on the selective use of agile methods in traditional, plan-driven assembly planning as part of factory planning.
Adaptive Mensch-Roboter-Kollaboration in der Montage*/Adaptive human-robot collaboration in assembly – Manual Processes in the Internet of Production – Uncertainty in a digitally simulated world?
Authors: Petruck H. , Mertens A. , Nitsch V.
Published: June 2021

Dieser Beitrag beschreibt eine Möglichkeit, den Faktor Mensch bei der Planung manueller Montagevorgänge in der Mensch-Roboter-Kollaboration (MRK) zu berücksichtigen. Das Ziel ist die echtzeitfähige Prädiktion der Dauer des Montageprozesses auf Mikro-, Meso- und Makro-Ebene der Produktion auf Basis von Methods-Time Measurement (MTM). Darauf aufbauend soll durch Adaption der Montagedauer eine ergonomische Interaktion zwischen Mensch und Roboter geschaffen werden.

 

This paper describes one way to consider human factors when planning manual assembly processes in human-robot collaboration (HRC). The goal is the real-time prediction of the duration of the assembly process on the micro-, meso- and macro-level of the production based on Methods-Time Measurement (MTM). This prediction is then used for an ergonomic human-robot interaction design by adapting the predicted assembly durations.
Maßgeschneiderte Halbzeuge*/Tailored Blanks – Manufacturing of functional parts for the realization of lightweight components
Authors: Hetzel A. , Schulte R. , Vogel M. , Degner J. , Merklein M.
Published: June 2021

Die Blechmassivumformung erlaubt die effiziente Herstellung von leichtbaugerechten Funktionsbauteilen mit verschiedenartigen Nebenformelementen in einem kombinierten einstufigen Tiefzieh- und Stauchprozess. Durch die Analyse der Umformergebnisse mit konventionellem Halbzeug anhand von Gefügeschliffbildern und Härtemessungen lassen sich Bauteilfehler in Form von Falten und Rillen identifizieren. Diese lassen sich größtenteils auf einen dreiachsigen Spannungs- und Dehnungszustand sowie eine inadäquate Formfüllung zurückführen. Eine signifikante Verbesserung der Bauteilqualität kann durch den Einsatz von maßgeschneiderten Halbzeugen in der untersuchten Prozesskette ermöglicht werden. Durch die Herstellung der Halbzeuge in einem Taumelprozess kann eine gezielte Materialvorverteilung erfolgen, welche die Formfüllung deutlich erhöhen und in Folge dessen die auftretenden Bauteilfehler reduzieren kann. Aktuelle Forschungsarbeiten am Lehrstuhl für Fertigungstechnologie beschäftigen sich demnach mit der Erweiterung des Einsatzbereichs von maßgeschneiderten Halbzeugen.

 

Sheet Bulk Metal Forming enables the efficient manufacturing of functional lightweight components with different functional elements in a combined single stage deep drawing and upsetting process. By investigating the forming results with a conventional blank, regarding the properties like grain structure and Vickers hardness distribution, process limitations such as buckling and folding can be detected. These failures occur due to a three-dimensional stress and strain state as well as an insufficient die filling. A significant improvement of the quality of the produced parts can be enabled by the use of Tailored Blanks in the investigated process chain. With the manufacturing of the semi-finished parts by orbital forming, an adapted material pre-distribution can be realized, thus improving the die filling followed by a decrease of the parts’ failures. Current research at the Institute of Manufacturing Technology focuses on the extension of the applicability of Tailored Blanks.
Torsionsfestigkeit von umformgefügten Zahnrädern*/Torsional Strength of Multi-Component Gears – static and dynamic torsional strength of gears manufactured by lateral extrusion
Authors: Meißner R. , Liewald M. , Leonhardt C. , Otto M. , Stahl K.
Published: June 2021

Im Rahmen des Verbundprojekts „massiverLeichtbau“ (AiF-KZ47M4712) wurde als Beitrag zur Gewichtsreduktion von Antriebsstrangkomponenten am Institut für Umformtechnik (IFU) in Stuttgart und an der Forschungsstelle für Zahnräder und Getriebebau (FZG) in München das Verfahrenskonzept zur umformtechnischen Herstellung von „gebauten“ Zahnrädern mittels Querfließpressen in Mehrkomponentenbauweise entwickelt und dessen Leichtbaupotenzial untersucht. Dieses Verfahren erlaubt das form- und/oder reibschlüssige Fügen von Zahnkranz, Zahnradkörper und Welle und erlaubt so eine kompakte, gewichtsoptimierte Bauweise solcher Zahnräder. Zur Quantifizierung des Anwendungspotenzials von gebauten Zahnrädern mittels Umformfügen wurden die Einflüsse des Werkstoffs, des Umformschmierstoffs und der Zahnkranzinnengeometrie auf das übertragbare Drehmoment gezeigt. Das Ziel der experimentellen Untersuchungen lag einerseits in der Ermittlung der Versagensart unter Torsionslast und schließlich in der Bestimmung einer optimalen Kombination aus Werkstoff, Umformschmierstoff und Zahnkranzinnenprofil zur Übertragung möglichst hoher Drehmomente. Die hier dargestellten Ergebnisse sowie einzelne Textpassagen stammen aus dem AiF-Abschlussbericht sowie einer vorangehenden Veröffentlichung [12].

 

In order to reduce the weight of powertrain components, the manufacturing process concept for joining by forming of „built“ gears using lateral extrusion in multi-component design is being developed and the lightweight potential is being investigated. This paper deals with the manufacturing of an assembled gearwheel using cold forging and simultaneously joining the gearwheel body with a gear ring. The aim of this publication is to demonstrate the influence of the material, the lubricant and the geometry of the inner gear ring on the transmittable torsional load based on built gears manufactured by joining by forming. The aim of the experimental investigations was on the one hand to determine the type of failure under torsional load and finally to determine an optimal configuration of material, lubricant and internal gear ring profile for the transmission of preferably high torques. The here presented results and individual text passages originate from the AiF final report [14] and a prior publication [12].
Verbesserung der Duktilität durch Kornfeinung*/Improvement of ductility by grain refining. Development of an isothermal ECAP tool for forming iron-aluminium alloys
Authors: Behrens B.-A. , Relge R.
Published: June 2021

Gegenüber herkömmlicher Stähle zeigen binäre Eisen-Aluminium-Legierungen eine hohe Korrosionsbeständigkeit und bieten gute Festigkeitseigenschaften bei niedriger Dichte. Jedoch werden FeAl-Legierungen aufgrund ihrer enormen Versprödung mit steigendem Aluminiumgehalt von potenziellen Anwendungen ausgeschlossen. Gezielt sollen ultra-feinkörnige Gefügestrukturen hergestellt werden, die zur Festigkeitssteigerung führen und zusätzlich zur Verbesserung der Duktilität metallischer Werkstoffe beitragen.

 

In comparison to conventional steels, binary iron-aluminium alloys exhibit high corrosion resistance and good low-density strength properties. However, the FeAl alloys are excluded from potential applications due to their enormous embrittlement with increasing aluminium content. Specifically, ultra-fine-grained microstructures are to be produced which increase the strength and additionally contribute to improving the ductility of metallic materials.
Lastverteilungen in Kugelgewindetrieben/Consideration of locally discrete loads in the service life calculation of ball screws
Authors: Brecher Christian , Biernat Benedikt , Neus Stephan
Published: June 2021

Kugelgewindetriebe (KGT) weisen abhängig von ihrer Geometrie und der vorherrschenden Belastung deutlich variable innere Lastverteilungen auf. Finite-Elemente-Modelle erlauben die Ermittlung dieser Verteilungen, die aktuell jedoch vor allem bei der Lebensdauerberechnung nur unzureichend berücksichtigt werden. Nachfolgend wird eine Methode zur Berücksichtigung ortsdiskreter Lastverteilungen in der Lebensdauerberechnung von Kugelgewindetrieben vorgestellt.

 

Ball screws (BS) exhibit strongly varying internal load distributions depending on their geometry and the applied load. With finite element models this distribution may be estimated, however, distributed loads are barely taken into account in applications such as service life calculation. In the following, a method to integrate discrete location load distributions into the service life calculation of ball screws is presented.
Effektivität industrieller Exoskelette/Effectiveness of exoskeletons – analysis of an expert survey
Authors: Schalk Marco , Siegert Jörg , Schneider Urs , Bauernhansl Thomas
Published: June 2021

Exoskelette sind neue ergonomische Hilfen, die körperliche Beanspruchung bei schwerer körperlicher Arbeit senken. Mit der wachsenden Nachfrage nach Exoskeletten wächst auch der Bedarf an neuem Wissen zu Wirksamkeit und Effizienz dieser Systeme. Hierzu wurde eine Expertenbefragung durchgeführt.

 

Exoskeletons are novel ergonomic aids preventing physical overuse resulting from heavy physical labor. With the growing demand of exoskeletons there is a growing need in new knowledge about their effectiveness and efficiency. An expert survey was carried out.
Masa intramiocárdica asintomática en un adulto mayor
Authors: Makhoul Silvia , Clos Esteban L , Kudrle Cozzolino Cynthia
Published: June 2021

Los tumores cardíacos primarios son infrecuentes, así como también la localización intramiocárdica de los mismos. Actualmente contamos con diferentes modalidades de imágenes, que nos permiten realizar una caracterización tisular de las masas cardíacas y establecer el compromiso funcional/hemodinámico de las mismas. Se presenta el caso de un paciente de 79 años que consulta por un hallazgo incidental de una masa intramiocárdica para definir la conducta.
Estenosis mitral no reumática. Complejo de Shone en un paciente adulto
Authors: Darú Víctor , Fallabrino Luciano , Pérez María Noelia , Cohen Marcelo
Published: June 2021

Se presenta el caso de una mujer de 34 años, sintomática por disnea de esfuerzos de un año de evolución, en donde se realiza el diagnóstico de complejo de Shone. Esta afección se caracteriza por presentar una serie de anomalías congénitas obstructivas, o potencialmente obstructivas, en el corazón izquierdo. Inicialmente fueron descritas cuatro afecciones: el anillo supravalvular mitral, la válvula mitral en “paracaídas”, la estenosis subaórtica y la coartación aórtica. Sin embargo, en la práctica clínica la definición del complejo ha sido ampliada para incluir otras formas adicionales de obstrucción en el corazón izquierdo.
RESEARCH & DEVELOPMENT OF PUBLIC-PRIVATE SECTOR WITH REFERENCE TO PROTECTION OF PLANT VARIETIES & FARMER RIGHTS
Authors: Thakur Archana , Mani Tripathi Kshemendra , Sharma Arpit
Published: June 2021

The main aim of this paper is to investigate the role of public and private sectors in
registering their plant variety under different categories as well as mapping the role
of public, private and farmer’s right with reference to legal provisions. The graphical
representation of data set of registered varieties (from 2009-2018) i.e. new, extant
variety and farmer variety in a longitudinal way to analyze the participation of the
public, private sector in registering the plant varieties. The finding of this study
clearly indicates that during the initial year i.e. 2009-2012 not so many varieties got
registered after that 2013-2018 specially in 2014 large varieties get registration in
different categories. The finding gives a comparative viewpoint that initially in the
year 2009 to 2012 public sector played a significant role in registration thereafter
2013-2018 private sector invest a lot specially in 2014 where large number of
varieties register by farmers of Odisha with reference to their farmer’s right. This
research gives a clear depiction to the private industries a positive trajectory of
benefit of registering the variety of plant under the PPV & FR legislation. The
Odisha case study enumerates the role of government and their public policies to
encourage farmers to register their traditional variety and get benefit out of it
SCHEDULED CASTE STUDENTS IN THE CONTEXT TO HIGHER EDUCATION IN JAMMU AND KASHMIR
Authors: Kumar Bushan
Published: June 2021

Ever since Indian higher education system treats education as a public good inevitably then it belongs to social sector. For years together it has been trying its level best to uplift the weaker section of our Indian society. This paper explore the barrier and enabler, identifies and analyses the social, personal, economic and educational problems Of the Scheduled Castes students (SCs) with reference to those who are pursuing and who did not pursue the higher education in their social contexts. The paper will focus on the higher education and Scheduled Caste in Indian and Jammu and Kashmir context and the role of Dr.B.R. Ambedkar in affirmative action in India. The rationale behind this paper is to analyze the barriers faced by SC students for not pursuing higher education, and to analyze the enablers which enable them to pursue higher education successfully. Paper will also highlight how some of the scheduled castes students successfully overcome to these issues and others failed in doing so. The data was collected through interview and analyze.
FLORAL EXTRACT OF Tibouchina granulosa (DESR.) COGN. PHYTOCHEMISTRY PROSPECTION, AND ANTIBACTERIAL ACTIVITY
Authors: Pereira de Menezes Filho Antonio Carlos , Ventura Matheus Vinícius Abadia , Castro Carlos Frederico de Souza
Published: June 2021

Tibouchina granulosa is a species that blooms annually in several regions of Brazil. This species is still little explored in terms of phytocompounds in all organs of this plant, especially the floral organ. Flowers of T. granulosa were collected in the municipality of Rio Verde, Goiás, Brazil, in 2021. The hydroethanolic floral extract was prepared by maceration and qualitative phytochemical (colorimetric reactions and salt formation) and antibacterial analyzes performed and the results expressed in millimeters of inhibition at different concentrations in mg mL-1. Several phytochemical classes were observed with positive results, especially for alkaloids, phenolics, oxylates, saponins, carbohydrates and tannins. As for the bacterial assay, potential antibacterial activity was observed for all bacterial strains tested, except for Salmonella serovar Thyphymurium and serovar Enteritidis. Expressive inhibitions were observed for Enterococcus faecalis > Pseudomonas aeruginosa > Staphylococcus aureus and Escherichia coli at the highest concentrations between 100-50 mg mL-1. The floral extract of Tibouchina granulosa showed phytotherapeutic potential with the presence of several phytochemical groups and expressive antibacterial activity.
REKLAMLAR EĞİTİMDE BİR ARAÇ OLARAK KULLANILABİLİR Mİ?
Authors: KURTDAŞ Emine Meliha
Published: June 2021

Eğitim her toplumda ve her dönemde bireyin toplumun bir parçası olma sürecinin önemli bir parçası olmuştur. Eğitimin yapısı, niteliği, şekli, eğitimde kullanılan yöntemler ve araçlar içinde yer aldığı toplumun yapısı tarafından şekillendirilir. Bu nedenle eğitim, toplumdan topluma ve dönemden döneme değişen bir olgudur. Günümüz küresel dünyasının en önemli özelliklerinin başında da iletişim yoğunluğu ve görselliğin artan önemi gelmektedir. Özellikle yeni yetişen nesiller dijital çağın gereklerine uygun olarak sosyalleşmekte, imaj ve görsellerin ağırlıkta olduğu bir dünyanın parçası haline gelmektedir. Bu süreçten eğitimim, özellikle örgün eğitimin etkilenmemesi ise düşünülemez. Çağın gereklerine uygun eğitim anlayışları ve araçlarının geliştirilmesi, eğitimin niteliğinin artırılmasına olmazsa olmaz bir gerekliliktir. Bu problemden hareketle bu çalışma, reklamlar gibi çocukların ve gençlerin ilgisini çekebilecek, zihinlerinde kalıcı etkiler bırakabilecek bir olgunun eğitimde kullanabileceği iddiasını taşımaktadır. Bu amaçla çalışma, reklamların neden etkili bir araç olduğu ve reklamların örgün eğitimde kullanılmasının neden önemli olduğunu ilgili literatürden yola çıkarak açıklamaya çalışmaktadır.
Diyabeti Olan Yetişkinlerin Koşulsuz Kendini Kabul ve Kronik Hastalığa Uyumlarının Değerlendirilmesi
Authors: İNEL MANAV Ayşe , ATİK Derya , ÇAPAR Ahmet
Published: June 2021

Amaç: Diyabetin kabul ve uyum süreci, hastalığın bireysel değerlendirilmesinden ve bireysel başa çıkma yanıtlarından etkilenir. Bu araştırma diyabeti olan yetişkinlerin koşulsuz kendini kabul düzeyleri ve hastalığa uyumlarını değerlendirmek amacıyla yapılmıştır.Yöntem: Kesitsel ve tanımlayıcı tipteki çalışma, 15.12.2019-15.02.2020 tarihleri arasında Osmaniye Devlet Hastanesi Dahiliye Poliklinik ve Kliniği’nde diyabet tanısı ile takip ve tedavisi sürdürülen 228 kişi ile gerçekleştirilmiştir. Veri toplama aracı olarak “Kişisel Bilgi Formu”, “Koşulsuz Kendini Kabul Ölçeği” ve “Kronik Hastalıklara Uyum Ölçeği” kullanılmıştır. Verilerin analizinde SPSS paket programı kullanılmıştır. İstatistiki anlamlılık seviyesi p<0.05 olarak alınmıştır.Bulgular: Diyabeti olan yetişkinlerin “Koşulsuz Kendini Kabul Ölçeği” toplam puan ortalaması 74.2±10.73 iken, “Kronik Hastalıklara Uyum Ölçeği” toplam puan ortalaması 86.07±12.99’dir. Diyabeti olan yetişkinlerin Koşulsuz Kendini Kabul Ölçeği koşulsuz kendini kabul alt boyut puan ortalamaları ile Kronik Hastalıklara Uyum Ölçeği toplam ve fiziksel ve psikolojik uyum alt boyut puan ortalamaları arasında istatistiksel olarak pozitif yönlü anlamlı ilişki vardır (p<0.05). Sonuç: Diyabeti olan yetişkinlerde koşulsuz kendini kabul orta ve hastalığa uyum iyi düzeyde ve anlamlı ilişkilidir.
TD 2661 - O Plano Marshall: uma abordagem atual à formulação, ao desenho e à coordenação de políticas públicas e programas governamentais
Authors: Lassance Antonio
Published: June 2021

Este Texto para Discussão investiga o Plano Marshall sob um ângulo inédito: o da formulação da estratégia, do desenho e da coordenação da implementação de uma política pública. Por meio de estudo de caso em profundidade, o Plano Marshall se revela uma experiência de grande envergadura que ainda traz à luz problemas crônicos e cruciais aos que se interessam pela análise ex ante de políticas. A conclusão é a de que o plano pode ser reinterpretado enquanto abordagem sobre problemas complexos e multicausais (wicked problems) em busca da construção de soluções integradas e ações o mais coordenadas possível. A abordagem consiste em primar por definições estratégicas centradas na escolha correta de problemas prioritários e na identificação de seu encadeamento causal. Em torno dessas definições, o desenho da política busca equilibrar respostas de curto prazo com a atenção a causas que se projetam no longo prazo. Tais pressupostos antecedem questões como a eficiência da alocação orçamentária e a otimização de recursos administrativos e regulatórios – que focam mais consequências que causas raízes. Garantidas essas preliminares, o desenho da política estabelece uma governança da política com o devido comando e controle central sobre a estratégia, mas com autonomia gerencial sobre os programas. Deixa-se em aberto inclusive uma parte do processo de formulação de alternativas para que elas se ajustem a uma implementação descentralizada e capilarizada, com uma rede de cooperação técnica que permaneça próxima da burocracia de nível de rua.
Otel İşletmelerinde Erteleme Davranışının Demografik Değişkenler Açısından İncelenmesi: Alanya Örneği
Authors: KAHYAOĞLU Mehmet , ARIKAN Ersin
Published: June 2021

Bu çalışmada otel işletmesi çalışanlarının örgütsel erteleme davranışı düzeyleri ve bu davranışın çeşitli değişkenlere göre farklılıklarının tespit edilmesi amaçlanmıştır. Çalışma kapsamında Alanya’daki beş yıldızlı otellerde çalışan 419 kişiden 2019 yılı Ağustos – Ekim ayları arasında kolayda örneklem yöntemiyle anket elde edilmiştir. İş görenlerin örgütsel erteleme davranışlarının bazı değişkenlere göre farklılıklarını belirleyebilmek için, bağımsız örneklemler için t testinden ve tek yönlü varyans analizinden (ANOVA) yararlanılmıştır. Bulgular ışığında genel olarak çalışanların çok yüksek bir erteme davranışı sergilemedikleri tespit edilmiştir. Katılımcıların erteleme davranışlarında, cinsiyetleri, turizm eğitimi alma durumları, işletmelerinin sezonluk veya tüm yıl olma durumları, öğrenim durumları, yaşları, maaşları, görevleri, departmanları ve deneyimlerine göre istatistiki olarak anlamlı farklılaştığı tespit edilmiştir.
Öğretmenlerin Kariyer Tatmini Düzeylerinin Demografik Değişkenlere Göre İncelenmesi
Authors: KILINÇ Yrd. Doç. Dr. Mustafa , TORTUMLU Muhammet , UZUN Kıvanç
Published: June 2021

Bu araştırmada, öğretmenlerin kariyer tatminlerinin cinsiyet, yaş, kıdem, gelir durumu, medeni hâl, öğrenim durumu ve branş değişkenleri açısından incelenmesi amaçlanmıştır. Bu amaç doğrultusunda çalışmada, nedensel karşılaştırma modeli kullanılmıştır. Araştırma, 2020-2021 eğitim-öğretim yılında Burdur il merkezinde ve ilçelerinde yer alan Millî Eğitim Bakanlığına bağlı resmi ve özel kurumlarda çalışmakta olan 325 öğretmen üzerinde gerçekleştirilmiştir. Çalışma grubunun yaş ortalaması 37.39’dur. Veriler araştırmacıların geliştirdiği kişisel bilgi formu ve Kariyer Tatmini Ölçeği ile toplanmıştır. Verilerin analizinde yüzde, frekans, aritmetik ortalama, standart sapma kullanılmış olup; farklılıkların tespitine ilişkin analiz için ise ilişkisiz örneklemler t-testi ve tek yönlü varyans analizi kullanılmıştır. Farklılıkların kaynağını test etmek amacıyla Tukey ve Hochberg’s GT2 testlerinden yararlanılmıştır. Tüm bu istatistiksel analizlerde SPSS 22.0 programı kullanılmış olup, anlamlılık düzeyi olarak .05 alınmıştır. Araştırmanın sonucunda, öğretmenlerin kariyer tatminlerinin, kıdem, gelir durumu, medeni hâl ve branş değişkenleri açısından anlamlı olarak farklılaştığı; ancak cinsiyet, yaş ve öğrenim durumu değişkenlerine göre anlamlı bir farkın olmadığı tespit edilmiştir. Çalışma bulguları ilgili alanyazın ışığında tartışılmıştır.
Yeni Medya ve Nostalji: TRT Arşiv Üzerine Bir Değerlendirme
Authors: SATIR Mehmet Emin
Published: June 2021

Tarihsel süreçte öncelikli olarak yurda duyulan özlem olarak kavramsallaştırılan nostalji, anlamsal olarak farklılaşmaya başlamış ve geçmiş zamana yönelmeye başlamıştır. Nostalji çerçevesinde bireyler sıkça geçmişe yönelirler ve geçmişi idealize ederler. Bu çerçevede nostaljik bakış açısının işlerliğinin temelde geçmişin idealize edilmesi ve şimdiki zamanın değersizleştirilmesi noktasında önemli olduğunu belirtmek gerekmektedir. Nostaljik bakış açısının gündelik hayattaki görünürlüğü noktasında yeni medya teknolojilerinin gelişim göstermesi önemli bir eşik oluşturmaktadır. Yeni medya araçları sayesinde geçmiş, bugüne sıklıkla sirayet edebilmektedir. Bu çerçevede yapılmış olan çalışmada, nostaljik bakış açısının yeni medyadaki görünümlerini ortaya çıkartmak amaçlanmaktadır. Çalışmada TRT Arşiv’in YouTube kanalı üzerinden paylaşmış olduğu içerikler, yargısal örnekleme tekniği ile belirlenmiş olup bu videolara yönelik olarak yapılmış olan yorumlar, netnografi yöntemi ile analiz edilmiştir. Elde edilen veriler, geçmişin idealize edilmesi ve şimdiki zamanın anlamsızlaştırılması çerçevesinde değerlendirilmiştir. Çalışma kapsamında incelenen verilerin de göstermiş olduğu üzere nostaljik bakış açısı, geçmiş ve şimdiki zaman arasında bir diyalektik sürecin sonucunda ortaya çıkmaktadır ve geçmiş idealize edilirken; şimdiki zaman değersizleştirilmektedir.
Bulancak İlçesinde Tarımsal İşletmelerin ve Üretim Faaliyetlerinin İncelenmesi
Authors: ÖZTÜRK Derya , İSLAM Ali , TURAN Ali , KÖSE Malik Arsal
Published: June 2021

Bu çalışmada, Giresun ili Bulancak ilçesinde tarımsal işletmelerin ve üretim faaliyetlerinin mevcut durumu incelenmiş ve öneriler yapılmıştır. Araştırmada kullanılan veriler, 2016-2017 üretim döneminde 10 köyden tabakalı tesadüfi örnekleme yöntemi ile seçilen 134 işletmeden anket yöntemi ile elde edilmiştir. İşletmeler sahip oldukları arazi büyüklüklerinin frekans dağılımına göre üç gruba ayrılmıştır. Araştırma sonuçlarına göre; işletme başına düşen ortalama işletme arazisi 1. grupta 5,02 da, 2. grupta 15,76 da, 3. grupta 45,80 da ve işletme genel ortalamasında ise 24,29 da olarak bulunmuştur. Her üç grupta da tarım arazilerinin çok büyük bir kısmını fındık bahçeleri oluşturmaktadır. Fındık arazilerini sırasıyla diğer meyveler, tarla bitkileri, sebzeler, çayır-mera ve çalılık-ağaçlık arazi izlemektedir. İşletmelerde tarım faaliyetlerinde karşılaşılan en önemli kısıtlar sırasıyla; düşük satış fiyatı, pahalı tarım girdileri, hastalık, düşük verim ve işgücü yetersizliği şeklinde sıralanmaktadır. Tarım faaliyetlerini geliştirmek için işletmeler daha fazla bilgilenmeye çalıştıklarını, il/ilçe tarım görevlilerine danıştıklarını, kooperatife/birliğe üye olduklarını ve kredi aldıklarını belirtmişlerdir. İşletmeler tarımla ilgili sorunlarını bilgili çiftçilere, arkadaşlarına/meslektaşlarına, tarım teşkilatı uzmanlarına danışarak çözmektedirler. Verim ve kalitenin artırması ve üretim maliyetlerinin düşürülmesi bakımından yeter işletme büyüklüğü ve modern tarım tekniklerinin yerinde ve zamanında uygulanması önerilmektedir. Ayrıca son zamanlarda daha da değer kazanan çiftçilik mesleği ve gıda üretiminin önemi de vurgulanmaktadır.
Ulrich Beck ve Anthony Giddens’ın Risk Toplumu Kavramsallaştırması Işığında Sosyal Medya ve Bilginin Güvenliği ve Gizliliği İlkesi
Authors: SIĞIN Aykut
Published: June 2021

Modernite kavramı her zaman için sosyolojik tartışmaların merkezinde yer almıştır. Bunun başlıca sebebi, sosyoloji disiplininin modern çağ içerisinde ortaya çıkmış olması ve modern toplumu incelemesidir. En basit ifadesiyle geleneksel olandan bir kopuşa işaret eden modern sözcüğünden türetilen modernite, kimi düşünürlere göre son bulmuş ve yerini post-modern döneme bırakmıştır. Buna katılmayan geç modernite kuramcıları ise moderniteden bir kopuştan çok, bir değişim ve dönüşüm sürecine odaklanılması gerektiğini savunmuşlardır. Bir geç modernist olan Ulrich Beck, ikinci modernite kavramını ortaya atmış ve bu dönemin risk kavramıyla tanımlanması gerektiğini iddia etmiştir. Diğer bir geç modernist olan Anthony Giddens ise risk olgusunu modernitenin tek sonucu olarak değil, birden fazla sonuçtan bir tanesi olarak değerlendirmiş ve risk toplumu kavramı bu iki düşünürün argümanları doğrultusunda şekillenmiştir. Mevcut çalışmada, dijital çağın Beck ve Giddens’ın risk toplumuyla ilgili iddialarına uygun bir görünüm sergilediği düşüncesinden hareket edilmiştir. Bu doğrultuda, dijital çağın önemli dönüştürücülerinden biri olan sosyal medya platformları, bilginin güvenliği ve gizliliği ilkesi bağlamında bir risk olarak kuramsal bir tartışma ekseninde ele alınmıştır. Çalışmanın sonucunda, risk toplumu kavramsallaştırmasına uygun olarak teknolojik gelişmelerin risk olgusuyla bağlantısının artan bir şekilde devam ettiği ve bunlarla baş edebilmek adına bireysel önlemlerin alınması gerektiği anlaşılmıştır.
Current status of human resource management in China and EU
Authors: Batsenko Liudmyla , Halenin Roman , Haibo Wang
Published: June 2021

This paper studies the situation of human resource management in the construction industry between China and the European Union. According to the analysis, it shows the importance of human resource management. It summarizes the current situation and existing problems of human resource management in China and the European Union. Corresponding measures are proposed to facilitate the sustainable and healthy development of human resource management.

Since the establishment of diplomatic relations between China and the EU, bilateral relations have developed smoothly. Later, the two parties established a strategic partnership. Subsequently, trade cooperation in various fields continued to develop. China proposes to implement the "One Belt One Road" initiative, and the European Union actively participates in the "One Belt One Road" framework agreement. The two parties' research on human resource management in the construction industry will be of great significance to promote further in-depth cooperation between the two parties in the field of construction and human resource management, and to expand and create a broader development space.

Suggested deepen the reform of teaching content and curriculum system in accordance with the modern development of human resources. Emphasized that education investment for developing human resources and improving the quality of workers is not a simple consumption, but a long-term productive investment. emphasis is placed on the personnel appraisal system establishment of its the guarantee for the stability of the management staff.
Social entrepreneurship as a factor in the development of rural communities in Ukraine
Authors: Pechenuik Alla
Published: June 2021

The results of empirical research of public opinion of rural areas residents and entrepreneurs working in rural communities to determine the need for the development of social entrepreneurship are presented. The purpose of the survey was to establish the feasibility, prospects and directions of the development of social entrepreneurship within the rural areas of Ukraine and to identify the readiness of the business environment for the perception of a new concept for doing business for them. The survey was conducted among the rural population and entrepreneurs of all ages, social status, education level, type of activity. The results of the study made it possible to find out the attitude of the rural population towards social entrepreneurship, to identify its potential loyalty to the consumption of the product, which will offer the specified category of entrepreneurs, identify the greatest problems of the rural territory, the level of satisfaction with the environment and business, the adequacy of information provision for social entrepreneurship, entrepreneurs' readiness to social activity and directions of its development; the reasons that restrain the spread of social ideas in business are identified. The conducted research has allowed to reveal the reasons of low level of spread of social enterprise in the Ukrainian society. The revealed sentiments among citizens can be used by the state authorities when developing the strategy of development of rural areas of Ukraine and tested in entrepreneurial activity.
The essence, content and role of digital transformation in development socio-economic systems
Authors: Avanesova Nina , Kolodiazhna Tetiana
Published: June 2021

The relevance of the research topic is due to the active penetration of digital technologies into all spheres of life of modern society. The business community and the governments of the countries of the world, including Ukraine, have realized the need to accelerate the processes of digitalization and digital transformation of the economy in order to achieve competitive positions in the emerging digital space of the new world economy. The digital economy sets the vector along which socio-economic systems of micro, meso, macro levels will develop in the long term, which necessitates research and a comprehensive analysis of digital transformation processes. Previously a priority for individual innovative companies, today digital transformation has become a massive phenomenon, and related projects are vital for the success not only of individual companies, but also of regions and countries. In this regard, a new institution is emerging in the economy, a new category of business structures in the service sector – service integrators, whose role in progressive economic development is significantly increasing, but the mechanisms of their functioning, methods of management, network service interaction with other economic entities, as well as many others the issues remain insufficiently studied, which in practice hinders the development of companies – service integrators. The outlined circumstances determine the relevance of the research topic, both in terms of the formation and development of modern economic theory, and for the increment of the scientific and methodological base of the practice-oriented toolkit for the digital transformation of socio-economic systems.
The development of electronic payment systems in Ukraine and their security
Authors: Polovenko Liudmyla , Merinova Svitlana , Kopniak Kateryna
Published: June 2021

The paper is devoted to the study of innovations in the market of modern payment systems. The pandemic and quarantine restrictions have accelerated the expansion of the payment infrastructure in Ukraine, which in turn raises the issue of security of electronic payment systems. Ukrainians are more actively switching to electronic payments. At the same time, the trend of growing popularity of contactless payment instruments and settlements with them continues. A comparative analysis of the security of payment systems using electronic technologies in the implementation of money transfer services in Ukraine has been performed. The components of the payment system, information security measures in the electronic payment system have been also considered. The schema of electronic payments and the block diagram of the information protection subsystem of electronic payment system have been constructed. The criteria for assessing the security of the electronic payment system have been determined. A total of fifteen safety criteria have been identified, they are divided into six groups according to the degree of safety. Six electronic system payments were used for the study and the research results have been presented in this paper. The tendencies of development of electronic payment systems in modern conditions and ways of improvement of their activity taking into account the newest information technologies have been outlined.
Dynamic analysis and forecast of effective development of the agri-food sector of European countries
Authors: Jurczak Robert
Published: June 2021

One of the relevant and demanded directions at this stage is the creation of modern tools for analytical and predictive projects in the development of the agri-food sector. Of particular importance is the substantiation of the globalization of agri-food markets, the integration of various types of activities. ensuring food security, development of exports and imports of agricultural products, levelling the standards of food consumption by various social strata of the population. Research into the problems of food security and independence of the European countries is necessary to substantiate a strategy for the development of the agri-food sector, including its sustainable innovative development. In modern conditions, the active participation of various countries in the world and regional trade is associated with significant competitive advantages. It allows to more efficiently use the available resources, to join the world achievements of science and technology, to modernize the economy at the optimal time, to more fully meet the needs of the population. In this article, an integrated approach is applied, which includes the study, assessment and forecast of various processes and factors of innovative development of the agri-food sector in modern conditions.
ACCESS and LRG-BEASTS: A Precise New Optical Transmission Spectrum of the Ultrahot Jupiter WASP-103b
Authors: Kirk James , Rackham Benjamin V. , MacDonald Ryan J. , López-Morales Mercedes , Espinoza Néstor , Lendl Monika , Wilson Jamie , Osip David J. , Wheatley Peter J. , Skillen Ian , Apai Dániel , Bixel Alex , Gibson Neale P. , Jordán Andrés , Lewis Nikole K. , Louden Tom , McGruder Chima D. , Nikolov Nikolay , Rodler Florian , Weaver Ian C.
Published: June 2021

We present a new ground-based optical transmission spectrum of the ultrahot Jupiter WASP-103b (

T

eq

=
2484

K). Our transmission spectrum is the result of combining five new transits from the ACCESS survey and two new transits from the LRG-BEASTS survey with a reanalysis of three archival Gemini/GMOS transits and one VLT/FORS2 transit. Our combined 11-transit transmission spectrum covers a wavelength range of 3900–9450 Å with a median uncertainty in the transit depth of 148 parts per million, which is less than one atmospheric scale height of the planet. In our retrieval analysis of WASP-103b’s combined optical and infrared transmission spectrum, we find strong evidence for unocculted bright regions (4.3σ) and weak evidence for H2O (

1.9
σ

), HCN (

1.7
σ

), and TiO (

2.1
σ

), which could be responsible for WASP-103b’s observed temperature inversion. Our optical transmission spectrum shows significant structure that is in excellent agreement with the extensively studied ultrahot Jupiter WASP-121b, for which the presence of VO has been inferred. For WASP-103b, we find that VO can only provide a reasonable fit to the data if its abundance is implausibly high and we do not account for stellar activity. Our results highlight the precision that can be achieved by ground-based observations and the impacts that stellar activity from F-type stars can have on the interpretation of exoplanet transmission spectra.
The Breakthrough Listen Search For Intelligent Life Near the Galactic Center. I.
Authors: Gajjar Vishal , Perez Karen I. , Siemion Andrew P. V. , Foster Griffin , Brzycki Bryan , Chatterjee Shami , Chen Yuhong , Cordes James M. , Croft Steve , Czech Daniel , DeBoer David , DeMarines Julia , Drew Jamie , Gowanlock Michael , Isaacson Howard , Lacki Brian C. , Lebofsky Matt , MacMahon David H. E. , Morrison Ian S. , Ng Cherry , de Pater Imke , Price Danny C. , Sheikh Sofia Z. , Suresh Akshay , Webb Claire , Pete Worden S.
Published: June 2021

A line of sight toward the Galactic Center (GC) offers the largest number of potentially habitable systems of any direction in the sky. The Breakthrough Listen program is undertaking the most sensitive and deepest targeted SETI surveys toward the GC. Here, we outline our observing strategies with Robert C. Byrd Green Bank Telescope (GBT) and Parkes telescope to conduct 600 hr of deep observations across 0.7–93 GHz. We report preliminary results from our survey for extraterrestrial intelligence (ETI) beacons across 1–8 GHz with 7.0 and 11.2 hr of observations with Parkes and GBT, respectively. With our narrowband drifting signal search, we were able to place meaningful constraints on ETI transmitters across 1–4 GHz and 3.9–8 GHz with EIRP limits of ≥4 × 1018 W among 60 million stars and ≥5 × 1017 W among half a million stars, respectively. For the first time, we were able to constrain the existence of artificially dispersed transient signals across 3.9–8 GHz with EIRP ≥1 × 1014 W/Hz with a repetition period ≤4.3 hr. We also searched our 11.2 hr of deep observations of the GC and its surrounding region for Fast Radio Burst–like magnetars with the DM up to 5000 pc cm−3 with maximum pulse widths up to 90 ms at 6 GHz. We detected several hundred transient bursts from SGR J1745−2900, but did not detect any new transient bursts with the peak luminosity limit across our observed band of ≥1031 erg s−1 and burst rate of ≥0.23 burst hr−1. These limits are comparable to bright transient emission seen from other Galactic radio-loud magnetars, constraining their presence at the GC.
Collisional Growth and Fragmentation of Dust Aggregates with Low Mass Ratios. I. Critical Collision Velocity for Water Ice
Authors: Hasegawa Yukihiko , Suzuki Takeru K. , Tanaka Hidekazu , Kobayashi Hiroshi , Wada Koji
Published: June 2021

We investigated fundamental processes of collisional sticking and fragmentation of dust aggregates by carrying out N-body simulations of submicron-sized icy dust monomers. We examined the conditions for collisional growth of two colliding dust aggregates in a wide range of the mass ratio 1–64. We found that the mass transfer from a larger dust aggregate to a smaller one is a dominant process in collisions with a mass ratio of 2–30 and an impact velocity of ≈30–170 m s−1. As a result, the critical velocity, v
fra, for fragmentation of the largest body is considerably reduced for such unequal-mass collisions; v
fra of collisions with a mass ratio of 3 is about half of that obtained from equal-mass collisions. The impact velocity is generally higher for collisions between dust aggregates with higher mass ratios because of the difference between the radial drift velocities in the typical condition of protoplanetary disks (PPDs). Therefore, the reduced v
fra for unequal-mass collisions would delay growth of dust grains in the inner region of PPDs.
CHAOS. VI. Direct Abundances in NGC 2403
Authors: Rogers Noah S. J. , Skillman Evan D. , Pogge Richard W. , Berg Danielle A. , Moustakas John , Croxall Kevin V. , Sun Jiayi
Published: June 2021

We report the direct abundances for the galaxy NGC 2403 as observed by the CHemical Abundances Of Spirals (CHAOS) project. Using the Multi-Object Double Spectrograph on the Large Binocular Telescope, we observe two fields with H ii regions that cover an R

g
/R

e
range of 0.18–2.31. Thirty-two H ii regions contain at least one auroral line detection, and we detect a total of 122 temperature-sensitive auroral lines. Here, for the first time, we use the intrinsic scatter in the T

e
–T

e
diagrams, added in quadrature to the uncertainty on the measured temperature, to determine the uncertainty on an electron temperature inferred for one ionization zone from a measurement in a different ionization zone. We then use all available temperature data within a H ii region to obtain a weighted-average temperature within each ionization zone. We rederive the oxygen abundances of all CHAOS galaxies using this new temperature prioritization method, and we find that the gradients are consistent with the results of a recent study of Berg et al. For NGC 2403, we measure a direct oxygen abundance gradient of −0.09(±0.03) dex/R

e
, with an intrinsic dispersion of 0.037(±0.017) dex and a N/O abundance gradient of −0.17(±0.03) dex/R

e
with an intrinsic dispersion of 0.060(±0.018) dex. For direct comparison, we use the line intensities from an earlier study of NGC 2403 by Berg et al. and find their recomputed values for the O/H and N/O gradients are consistent with ours.
Observations of Magnetic Reconnection with Large Separatrix Angles and Separatrix Jets above the Solar Surface
Authors: Xue Z. K. , Yan X. L. , Yang L. H. , Chen J. , Wang J. C. , Liu Z. , Lee K. H. , Lee L. C.
Published: June 2021

We analyze six cases of magnetic reconnection with large separatrix angles and separatrix jets observed on the solar disk. The separatrix angle is defined as the angle between the two separatrices on the two sides of the outflow region. The plasma jets are observed immediately downstream of the separatrices. The morphological characteristics and magnetic field configurations of all magnetic reconnections are displayed. At the same time, we calculate several physical parameters of each case, which include the inflow velocity (from 2.3 to 24 km s−1), the outflow velocity (from 1.9 to 43 km s−1), the separatrix jet velocity (from 13 to 82 km s−1), the width (from 0.42 × 103 to 1.2 × 103 km) and length (from 1.4 × 103 to 4.3 × 103 km) of the current sheet, and the separatrix angle θ
sep (from 72° to 128°). We find that the outflow velocity, the separatrix jet velocity, and the width and length of the current sheet are positively related to the inflow velocity, but the separatrix angle does not depend on the inflow velocity and it is related to the initial magnetic field configuration before magnetic reconnection. Meanwhile, the velocities of the outflow and the separatrix jet decrease with increasing

θ

sep

−
90
°

, indicating that when the separatrix angle is close to 90°, the jet and the outflow reach their maximum velocities. These observations are compared with the results of the theoretical model and the numerical simulation.
Evaluating Low-frequency Pulsar Observations to Monitor Dispersion with the Giant Metrewave Radio Telescope
Authors: Jones M. L. , McLaughlin M. A. , Roy J. , Lam M. T. , Cordes J. M. , Kaplan D. L. , Bhattacharyya B. , Levin L.
Published: June 2021

The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) project has the primary goal of detecting and characterizing low-frequency gravitational waves through high-precision pulsar timing. The mitigation of interstellar effects is crucial to achieve the necessary precision for gravitational wave detection. Effects like dispersion and scattering are stronger at lower observing frequencies, with the variation of these quantities over week–month timescales requiring high-cadence multifrequency observations for pulsar timing projects. In this work, we utilize the dual-frequency observing capability of the Giant Metrewave Radio Telescope (GMRT) and evaluate the potential decrease in dispersion measure (DM) uncertainties when combined with existing pulsar timing array data. We present the timing analysis for four millisecond pulsars observed with the GMRT simultaneously at 322 and 607 MHz, and compare the DM measurements with those obtained through NANOGrav observations with the Green Bank Telescope and Arecibo Observatory at 1400–2300 MHz frequencies. Measured DM values with the GMRT and NANOGrav program show significant offsets for some pulsars, which could be caused by pulse profile evolution between the two frequency bands. In comparison to the predicted DM uncertainties when incorporating these low-frequency data into the NANOGrav data set, we find that higher-precision GMRT data is necessary to provide improved DM measurements. Through the detection and analysis of pulse profile baseline ripple in data on test pulsar B1929+10, we find that, while not important for these data, it may be relevant for other timing data sets. We discuss the possible advantages and challenges of incorporating GMRT data into NANOGrav and International Pulsar Timing Array data sets.