bluuebunny/crossref_metadata_2025 huggingface dataset:
Zero-Point Energies from Bond Orders and Populations Relationships
Authors: Zulueta Barbaro , Rude Colin , Mangiardi Jesse , Petersson George , Keith John
Published: September 2024

We report two analytical models for calculating quantum mechanical zero point energies (ZPEs) based on data from just a single-point quantum chemistry energy calculation. Fol- lowing our earlier model that partitioned molecular atomization energies and bond ener- gies using bond orders and orbital population analyses (i.e. the BEBOP method), the ZPE- BOPn methods reported here partition molecular zero-point energies from bond orders and orbital populations. As a starting point, the ZPE-BOP1 model employs a Mulliken orbital populations via a minimal population localization from a B3LYP/6-311+G(3d2f,2df,2p) calculation and leverages an extended Hückel-type vibrational bond energy term with two atom-pairwise parameters that are fit to reproduce scaled ZPEs from B3LYP calculations. For improved accuracy, the ZPE-BOP2 model employs Mulliken orbital populations via a minimal population localization from an ROHF/6-311+G(3d2f,2df,2p) calculation and employs an extended Hückel-type vibrational bond energy term, a short-range anharmonic energy term, and a coupled three-body oscillator energy term with seven atom-pairwise parameters. Both methods efficiently predict ZPEs in molecules without the need for a costly Hessian calculation, but ZPE-BOP2 outperforms ZPE-BOP1 in strained and long- chain molecules and provides reasonable predictions of ZPEs from Hessian calculations using semiempirical quantum chemistry methods (e.g., AM1, PM6, and PM7). This work shows progress toward computational approximations to predict useful chemical physical properties from orbital populations without intensive Hessian calculations.
High Conversion Propane Dehydrogenation by Photocatalysis under Ambient Conditions
Authors: Yuan Yucheng , Zhang Yuhan , Menzel Jan Paul , Santoro John , Dolack Madeline , Wang Hongyan , Batista Victor , Wang Dunwei
Published: September 2024

Propane dehydrogenation is actively pursued as a promising method for propylene production to fill a growing supply-demand gap. As limited by the thermodynamics of this transformation, existing approaches face challenges of relatively low conversion and the need for high temperature and low pressure. In this work, we report a photocatalytic approach that enables conversion beyond what can be achieved by conventional thermocatalysis. With sodium decatungstate and cobaloxime pyridine chloride as cooperative photocatalysts, we achieved a new benchmark in propane dehydrogenation of 68.9% conversion and near unity selectivity toward propylene production at room temperature and atmospheric pressure, with hydrogen as the only byproduct. These results prove the concept of dehydrogenating propane for propylene production using light as the key energy input.
Identification of remnant OCT media artifacts after tissue washing by MALDI mass spectrometry imaging
Authors: Zemaitis Kevin , Kumar Rashmi , Veličković Marija , Veličković Dušan , Qian Wei-Jun , Paša-Tolić Ljiljana
Published: September 2024

RATIONALE Universally, the most common method of embedding dissected or resected fresh frozen (FF) tissues is within optimal cutting temperature (OCT) media. Unfortunately, OCT is not ideal for mass spectrometry (MS) assays. The media perfuses through tissues, resulting in persistent polymer contamination causing issues for sensitive analyses. Complete removal of all OCT media background would enable techniques such as MS imaging (MSI) to be bridged to clinically relevant samples stored in biobanks which possess extensive medical histories. Even though methods have been outlined for spatial lipidomics and proteomics, many still avoid these tissues despite vast potential for biological discoveries applying MS or MSI. METHODS Reference FF human pancreas was prepared within OCT media and cryosectioned for matrix-assisted laser desorption/ionization (MALDI)-MSI. Sample preparation protocols using aqueous ammonium formate for spatial lipidomics, and a variety of solutions for fixation, delipidation, and salt removal enabled spatial proteomics as well. MSI was performed on a UHMR HF Orbitrap MS detected broad classes of lipids and intact proteins, enabling an assessment of polymer perfusion and signal delocalization over a broad mass range to evaluate any deleterious artifacts. RESULTS We observe lower polymer contamination from OCT tissues with ammonium formate washes as expected, with several caveats. This was most effective in negative ion mode, where in tandem with the boosted lipid signal positive results were achieved for phospholipids (600-900 Da) and higher mass lipids (>1250 Da). Positive ion mode analyses can be completed for phospholipids, but the condensation of alkali adducts to protonated forms not only increased lipid signals, but also increased signals of larger, persistent PEG oligomers (>1250 Da) which were not previously reported. Even with extensive tissue washing completing a spatial proteomics protocol, the removal of all remnant artifacts of OCT media was not feasible. CONCLUSIONS The finding of these persistent remnant polymers from the OCT embedding process has several consequences for MSI, directly effecting primary performance of the MALDI source and lipid and protein analyses. This does not mean OCT tissues should not be or cannot be used for spatial omics by MSI, but several quality control and quality assurance measures should be implemented, and we discuss paths forward and several considerations.
Multiexciton absorption cross-sections of CdSe@CdS nanorods studied using Pump-rePump-Probe Spectroscopy
Authors: Kumar Krishan , Uhlig Jens , Baruah Raktim , Yadav Shivani , Wächtler Maria
Published: September 2024

Understanding the multiexciton properties of nanocrystals is the basis for harnessing their full potential for various device applications. The multiexciton dynamics in semiconductor nanocrystals are widely explored. However, the absorption cross-sections for multiexcitons of varying order are not so well understood. To gain insights into the absorption cross sections for multiexcitons, we performed pump-repump-probe transient absorption (ppp-TA) spectroscopic measurement on CdSe@CdS nanorods. By tuning the pump-repump delay time and repump intensity, we were able to generate and reexcite various transiently living multiexcitonic species. We modelled the ppp-TA data using a Markov Chain Monte Carlo target analysis method, with this we determined the spectral shape and lifetime of higher order excitons (up to tri-excitons). This method also enabled us to extract absorption cross-section parameters for different multiexcitonic states. Our results indicate that for 400 nm excitation, the absorption cross-sections of excited state species are largely independent of exciton order.
Wijsman and Wijsman Randomly Triple Ideal Convergence Sequences of Sets in Probabilistic Metric Spaces
Authors: Rashid M.H.M. , Al-Maita Rabaa
Published: September 2024

Many authors have extended the concept of convergence from number sequences to sequences of sets. In this paper, we focus on two notable adaptations: Wijsman convergence and randomly ideal convergence. We introduce and analyze several new types of convergence for sequences of sets: IψW3-convergence, I∗,ψW3-convergence, IψW3-Cauchy, I∗,ψW3-Cauchy, (IψW3, IψW)-convergence, and (I∗,ψW3, I∗,ψ)-convergence. These new concepts expand the framework of convergence and provide a deeper understanding of the behavior of set sequences under various conditions. Through rigorous analysis, we demonstrate the relationships between these new forms of convergence and their classical counterparts, highlighting their theoretical significance and potential applications in mathematical analysis and related fields. Our findings offer a comprehensive exploration of these advanced convergence concepts, paving the way for further research and development in this area.
Nonlinear Steady-State VOC and Oxygen Modeling in Biofiltration
Authors: Raju R. Vignesh , Karpagavalli S.G. , Swaminathan R.
Published: September 2024

This paper compares analytical solutions for steady-state volatile organic compounds (VOC) and oxygen concentrations in the context of bio-filtration modeling. Based on a set of nonlinear reaction/diffusion equations, this model consists of the following components:A nonlinear term from Monod kinetics and Andrew kinetics.A Monod kinetics, interactive model.An Andrews kinetics, interactive model.The theoretical findings are helpful in the design of bio-filters. The ability of two independent strategies, the Akbar Ganji Method (AGM) and the Homotopy perturbation Method (HPM), to forecast steady-state concentrations is tested. The study investigates the advantages and disadvantages of both techniques, shedding insight into their practical usefulness in bio-filtration systems. The outcomes of this study lead to a better understanding of bio-filtration processes. They could influence the design.
Variational Iteration Method for Solving Reaction Diffusion Equation in Oscillatory Chemical Reactions
Authors: Saravanakumar R. , Kodi K. Basari , Selvaganesh T. , Subramanian K. , Saranya K. , Alessa Nazek
Published: September 2024

A mathematical modelling of an oscillatory chemical reactions based on diffusion is discussed. Analytical solutions have been found for the system of nonlinear diffusion equations of second order in the model. Nonlinear oscillation partial differential equations can be solved accurately and efficiently using the He's variational iteration method. He's variational iteration method can be used to obtain approximate analytical solutions to the system. Analytical approximation is compared with numerical simulation as well.
On Some Applications of P-Contraction Fixed Point Theorems in Bipolar Metric Spaces
Authors: Varalakshmi K. , Reddy G. Upender
Published: September 2024

In this paper, we have discussed the P-contraction type fixed point theorems of covariant mappings in bipolar metric spaces, and we have shown an example which supports our results. Also we discussed applications to integral equations and Homotopy theory.
HÂZÂ KİTÂB-I SEGİR-NÂME (İNCELEME-METİN)
Authors: Tuğluk Mehmet Emin
Published: September 2024

Türk edebiyatında insan vücudunun bir yerinde deri ile birlikte derinin hemen altındaki kasların hafifçe oynamasını yorumlayarak gelecekten haber veren ve bir çeşit fal kitabı niteliğinde kaleme alınan pekçok eser vardır. Bu eserler ihtilâc-nâme, kütüb-i ihtilâc, segir-nâme, seğir-nâme, seyirir-nâme, seyirme-nâme gibi farklı adlarla kaleme alınmışlardır. Türk edebiyatında ilk örnekleri Uygurlar döneminde Uygur harfleriyle görülen segir-nâmelerin Türk edebiyatında yazılan pekçok örneği vardır.
Segir-nâmeler geleceği işaret etmelerinden dolayı insan davranışlarına yön vermede etkili olmuş eserlerdir. Bundan dolayı segir-nâmeler geçmişten günümüze geleceği merak edenler için başvuru kaynakları arasındadır.
Bu çalışmaya konu olan “Hâzâ Kitâb-ı Segir-nâme” adlı eser Milli Kütüphane Yazmalar Koleksiyonuna 06 Mil Yz A numarası ile kayıtlı 53 varaktan oluşan “Hâzâ Kitâb-ı Tâʿbirnâme-i İbn-i Sîrîn Allâhu Aʿlem” adlı eserin arkasında yer almaktadır. “Hâzâ Kitâb-ı Segir-nâme” adlı eserin müellifi / müstensihi belli değildir. Eser 6 varaktan oluşmaktadır.
Bu çalışmada 06 Mil Yz A 8103 numaraya kayıtlı segir-nâmenin çeviri yazısı yapılmıştır. Ardından eser imla ve ses bilgisi açısından incelenmiştir. Çalışmanın sonuna ayrıca eserin tıpkıbasımı eklenmiştir.
SEMIOTIC IDEOLOGIES OF THE TAROT CARD READING PRACTICE
Authors:   The Moscow School of Social and Economic Sciences, Malinovskii Il’ya A.
Published: September 2024

This paper attempts to describe the main semiotic ideologies
(interpretation systems) of the Tarot card reading, to identify what determines the choice of an interpretation system by a practioner. Based on the
results of semi-structured interviews and participant observation, the author
was able to distinguish two modes of the Tarot card reading: divination based
on meanings and divination in the state of Flow. The Tarot card reading in
the state of the Flow involves the synthesis of intuition and meanings based
on intuition, building a narrative and immersion in a trance state. On the
basis of ethnographic material, three main semiotic ideologies of the Tarot
card reading were also identified and described: occult (spiritual), esoteric,
and psychotherapeutic. They differ on the basis of two criteria: reflection on
the nature of the practice (the definition of the Tarot card reading as a magical, religious or psychotherapeutic practice) and reflection on transcendental
sources of information (what is perceived as a source of information in the
process of divination: deities/spirits, the unconscious, Tarot egregor, information field). The initial hypothesis that the difference between the semiotic
ideologies of the Tarot card reading lies in the different level of agency attributed by tarot readers to themselves has not been confirmed. An analysis
of the interviews and the results of the experiment showed that most practioners attribute to themselves a high level of agency, that is, they perceive
themselves as responsible for the results of their predictions. The choice of a
semiotic ideology may depend on the situation of divination: when divining
oneself, one is most often guided by psychotherapeutic semiotic ideology,
while divining by others – spiritual or esoteric
MSME GROWTH IS BEING PROPELLED BY INDIA'S DIGITAL TRANSFORMATION
Authors: Jone I.Arthi , C. Dhanalakshmi
Published: September 2024

This article looks at the positive relationship that exists between the growth of Micro, Small, and Medium-Sized Enterprises (MSMEs) in India and the country's digital transformation. As India adopts digital technology across all industries, MSMEs are making the most of these innovations to increase productivity, expand their market reach, and streamline operations. This research uses relevant literature reviews and empirical data analysis to help MSMEs understand the driving reasons behind India's economy's digital transformation. It highlights the way in which digitization transforms MSMEs by presenting examples of successful adoption and the subsequent growth trajectories. Additionally, the paper provides policy implications and strategic recommendations to eventually promote inclusive and sustainable economic development in India by further catalysing the positive benefits of digitalization on MSMEs.
O PAPEL DA EDUCAÇÃO NA FORMAÇÃO DO JUÍZO POLÍTICO: UMA PERSPECTIVA ARENDTIANA SOBRE DIVERSIDADE E INCLUSÃO
Authors: Pinheiro Flávio
Published: September 2024

Este artigo aborda o papel crucial da educação na formação do juízo político, sob a ótica da filosofia de Hannah Arendt, destacando sua relação intrínseca com a diversidade e inclusão no contexto educacional. O problema de pesquisa centraliza-se na compreensão de como a educação pode moldar a capacidade dos indivíduos de discernir questões políticas e participar ativamente na esfera pública, considerando a diversidade de
perspectivas e identidades presentes na sociedade contemporânea. Os objetivos desta investigação são elucidar a concepção de juízo político em Arendt, analisar a influência da educação nesse processo, e examinar como a promoção da diversidade e inclusão pode contribuir para uma formação mais ampla e participativa do juízo político. O arcabouço teórico fundamenta-se nas obras de Hannah Arendt, especialmente em suas reflexões sobre a ação política, a pluralidade humana e a importância da educação para a formação do cidadão. Quanto à metodologia, este estudo adota uma abordagem qualitativa, com revisão bibliográfica e análise interpretativa das obras de Arendt, articuladas com estudos
contemporâneos sobre diversidade e inclusão na educação. Os resultados revelam a relevância da educação como espaço para cultivar o juízo político dos indivíduos, enfatizando a necessidade de promover ambientes educacionais inclusivos e respeitosos da diversidade, a fim de fortalecer a participação cívica e a construção de uma sociedade mais democrática e plural.
O apátrida e o refugiado: a questão dos direito humanos em Hannah Arendt
Authors:   , Pinheiro Flávio Maria Leite
Published: September 2024

A presente dissertação possui como objetivo discutir o problema fundamental enfrentado pelos apátridas que se constitui no desrespeito aos direitos humanos tidos como clássicos. Assim a situação singular dos apátridas vincula-se de maneira especial com a sua relação com o Estado por não serem juridicamente reconhecidos em seu Estado de origem e também em nenhum lugar do mundo. Isso mostra que a perda dos direitos nacionais significaria também a perda dos direitos humanos fato que leva ao não reconhecimento dos apátridas como seres humanos e mais, a expulsão deles da própria humanidade como assevera Hannah Arendt. O fenômeno apátrida mostra a dificuldade do ser humano em conviver com o diferente. A ineficácia dos direitos fundamentais clássicos em lidar com os apátridas é uma constatação que se chega com esse trabalho. Como possibilidade de solução utiliza-se o conceito de cidadania para Arendt como direito a ter direitos para rediscutir a função e os objetivos que sempre foram atribuídos aos direitos humanos, expressados na fórmula clássica da Revolução Francesa (direito à vida, direito à liberdade, direito à propriedade etc). Nesse sentido a proposta arentiana mostra-se mais adequada frente às novas situações e dilemas enfrentados pela sociedade no século XXI. Para isso a conceituação dos direitos humanos é debatida no decorrer do trabalho bem como a nacionalidade, que pode ser entendida como vínculo que une o indivíduo ao Estado, portanto indispensável para a efetivação dos direitos fundamentais e da cidadania.
DISCURSOS EM EDUCAÇÃO CONTEMPORÂNEA
Authors: Silva Ana Keyla Oliveira da , Farias Athena de Albuquerque , Dias Deuma Conceição Rodrigues Damasceno , Freire Edileuza Lima , Medeiros Elyskarien Ferreira Rosendo , Timóteo Emídia Inácio , Nunes Ginete Cavalcante , Oliveira Gislene Farias de , Silva Graça Maria de Morais Aguiar e , Guimarães Halisson Rafael , Rocha Hidemburgo Gonçalves , Pinheiro Filho Isac Sales , Silva Kelly Cristina Cardoso da , Sousa Léa Barbosa de , Freitas Lindemberg Rocha , Nascimento Maria Cristina Delmondes , Carvalho Maria das Graças de , Teixeira Paulo Tadeu Ferreira , Saraiva Piedley Macedo , Lopes Raimundo Edilberto Moreira , Sousa Rayane Morais de , Guimarães Romana , Silva Rui Barreto da , Bezerra Victor Emanuel Lima
Published: September 2024

O livro Discursos em Educação Contemporânea reúne uma diversidade de abordagens sobre os desafios e avanços no cenário educacional atual. Ao longo de dez capítulos, os autores exploram temas cruciais como a relação entre família e escola, inclusão de Universitários com TDAH, indisciplina, gestão escolar e diversidade cultural na música. Reflexões sobre o desenvolvimento infantil e os desafios enfrentados por alunos com necessidades especiais, são discutidos, bem como a importância da alfabetização e o impacto das metas da ONU para o desenvolvimento sustentável. Esta obra propõe uma análise profunda das práticas educacionais, destacando o papel transformador da educação na sociedade.
A RELAÇÃO FAMÍLIA X ESCOLA: REFLEXÕES SOBRE O DESENVOLVIMENTO INFANTIL
Authors: Nunes Ginete Cavalcante , Silva Kelly Cristina Cardoso da , Timóteo Emídia Inácio , Teixeira Paulo Tadeu Ferreira
Published: September 2024

O presente trabalho apresenta uma pesquisa qualitativa a qual investigou a influência da família na escola. A pesquisa consistiu em um estudo bibliográfico calcado em influentes teóricos da educação. O objetivo do trabalho foi identificar as principais dificuldades enfrentadas devido à ausência dos pais na escola. Como resultados nossas análises concluíram que cabe a família, a qual é a base do desenvolvimento do ser humano, a tarefa de oferecer o conhecimento para seu crescimento como indivíduo tornando-o capaz de ser feliz e produtivo dentro de sua realidade de suas potencialidades e de seus limites. Portanto, percebe-se que a importância do acesso a família deve ser ponto da preocupação da escola. Esses desafios nos levam a buscar recursos e fundamentos para melhor cuidar desse instrumento como fonte de aprendizagem na interlocução entre escola e família, no intuito de potencializar a dimensão social de todo o processo ensino- aprendizagem. Este estudo buscou refletir sobre a importância da participação da família junto a escola e qual o impacto desta participação na vida dos estudantes. Para realização desse estudo foram utilizados como base teórica os estudos de: Da Costa (2019), Dessen; Polonia (2007), Paro (2000), Seagoe (1978), Weber (2007), entre outros. Possuímos como certeza que o acesso da família à escola é de suma importância para o total desempenho dos estudantes. Assim, família e escola é uma parceria que dará sempre bons resultados para a educação.
Habilidades e Competências na BNCC: um contexto sobre oralidade no ensino médio em um município do Cariri
Authors: Távora Ana Maria de Faria Fernandes
Published: September 2024

Este estudo oferece uma análise instigante sobre a implementação das Habilidades e Competências Específicas de Oralidade, estabelecidas pela Base Nacional Comum Curricular (BNCC), no contexto de escolas de Ensino Médio em Barbalha, Ceará. Ao explorar como professores de língua portuguesa reconhecem e aplicam essas diretrizes, a pesquisa revela uma discrepância alarmante entre a teoria e a prática pedagógica. Por meio de uma abordagem quantitativa e fundamentada em dados robustos, o estudo evidencia os desafios enfrentados pelos educadores ao tentar transformar o conhecimento teórico em atividades de ensino eficazes.
Os resultados obtidos despertam reflexões profundas sobre a capacidade do sistema educacional de formar alunos aptos a utilizar a oralidade de maneira competente em diversos contextos sociais. Além disso, a pesquisa levanta questões cruciais sobre o papel das formações docentes na efetivação dessas práticas, sugerindo a necessidade de uma investigação qualitativa que aprofunde o impacto dessas capacitações.
Este e-book é um convite ao leitor para explorar as nuances do ensino de oralidade no Brasil, revelando as complexidades e os desafios enfrentados por educadores na tentativa de alinhar a prática pedagógica às demandas da BNCC. Uma leitura indispensável para educadores, pesquisadores e todos aqueles interessados em compreender e aprimorar o ensino da língua portuguesa no país.
ASSESING THE POTENTIAL OF DIGITAL TERRAIN MODELS FOR MONITORING ADDITIONAL SUBSIDENCE OF COMMUNICATION EMBANKMENTS IN MINING AREAS – A CASE STUDY
Authors: Kapusta Łukasz , Sobura Szymon
Published: September 2024

Today’s technologies make it possible to capture certain phenomena that were very difficult or impossible to observe in terms of classical measurements. One of them is the so-called sinking of embankments. It is common in mining areas. It consists in the additional subsidence of the embankments into the ground, above the value of the lowering of the adjacent area. It takes place primarily in the zone of horizontal tensile deformations. The paper presents the results of comparative DTM (Digital Terrain Model) analyzes from 2001, 2014, 2018 and 2021. Their aim was to assess the usefulness of DTM data for monitoring the additional sinking of the communication embankment on the example of the northern bypass of Bytom. The authors analyzed digital terrain models generated in the process of rasterization of data from ALS (Airborn Laser Scanning).
Structural geology and tectonic influence on lineament density and slope variation in Southern Ebonyi, Nigeria: An ArcGIS Approach
Authors: Charity Nkiru Nwokeabia  , Benard Ifeanyi Odoh  , Callista Nwanneka Igwebudu
Published: September 2024

This study investigates the structural geology and tectonic influences on lineament density and slope variation in Southern Ebonyi, Nigeria, using ArcGIS. The research aims to analyze the spatial distribution and density of lineaments and their correlation with slope variations to understand the region's geomorphology. Slope data was categorized into five classes, revealing that the majority of the area exhibits gentle slopes, indicative of tectonic stability. Conversely, regions with steeper slopes suggest localized tectonic activity. The analysis of lineament density identified areas with varying tectonic influences, with most of the study area showing low-density lineaments, suggesting relative tectonic stability. High-density lineament zones correspond to regions of significant tectonic deformation, often aligning with steeper slopes. The study concludes that the geomorphology of Southern Ebonyi is predominantly shaped by long-term erosional processes and localized tectonic activities. The novelty of this research lies in its comprehensive spatial analysis of both slope variation and lineament density, providing new insights into the tectonic and structural dynamics of the region.
Multilevel Governance and Smart Specialisation Strategy: The case of the Swifts Creek district in Gippsland
Authors: Armillei Riccardo , Goedegebuure Leo , Richards Alyce
Published: September 2024

In November 2019, the Victorian Government announced the Victorian Forestry Plan. It set out the gradual transition away from native forest harvesting to a plantation-based timber supply by 2030. A revised timeline was communicated in May 2023, bringing forward the cessation of native timber harvesting to 1 January 2024. To support businesses, workers and communities during the transition, 11 towns were identified for the preparation and implementation of so-called local development strategies (LDSs) as they were considered to be most impacted by the Forestry Plan. The objective of an LDS is to assist local communities to undertake diversification planning to secure long-term sustainable industries. A key part of the local development strategy is to promote collaborative ways of working within a community, and to provide capability training that will support communities to pursue regional innovation opportunities beyond the lifespan of the LDS project.
The LDS drew on the Smart Specialisation (S3) methodology, a place-based, evidence driven, inclusive process for identifying and developing regional strengths and assets and opportunities for innovation. This paper will examine how this has played out in one of the 11 communities, Swifts Creek. Based on 79 individual interviews and community-based workshops conducted between March and December 2023 with a diverse range of regional stakeholders, as well as on the analysis of secondary data sources, we provide insights into the ways of working in the region, perceived strengths, and possible innovation activities. We also discuss the challenges in generating a wider involvement in the implementation of this project, including a lack of understanding about the timber transition or the S3 approach for many participants. There is currently little or no research regarding the implementation of S3 specifically in regional settings. This qualitative study is thus timely in identifying multilevel governance (MLG) issues in support of implementing S3 in regional planning and the challenges faced by small regional communities engaged in industry transition.
Digitale Werkzeugkette zur leichtbauoptimierten Auslegung von schnelllaufenden, ebenen Mechanismen
Authors: Brückmann Nils , Corves Burkhard , Hüsing Mathias , Schröder Kai-Uwe , Cleven Raphael
Published: September 2024

Im Rahmen dieses Beitrags soll die Idee einer digitalen Werkzeugkette
vorgestellt werden, die die Methoden der Mechanismensynthese,
Belastungsanalyse und Strukturoptimierung modellbasiert miteinander
verbindet und es somit ermöglicht, in einer signifikant kürzeren Entwicklungszeit
dynamisch leistungsfähigere bzw. ressourceneffizientere
ebene Mechanismen zu entwickeln.

Digital Tool Chain for Lightweight-optimized Design of
High-speed, Planar Mechanisms.
This contribution presents the idea of a digital tool chain that combines
the methods of mechanics synthesis, load analysis and structural
optimization in a model-based approach and thus enables the development
of dynamically more powerful and resource-efficient planar
mechanisms in a significantly shorter development time.
Auslegung eines Wellgetriebes
Authors: Wolf Simeon , Brünjes Vincent , Hüsing Mathias , Corves Burkhard
Published: September 2024

Wellgetriebe (auch Harmonic Drives genannt) sind gleichförmig hochübersetzende,
koaxiale Zahnradgetriebe in denen ein flexibles, im elastischen
Bereich verformtes, Zahnrad verbaut ist. Sie finden ihre Anwendung in
Bereichen, die hohe Genauigkeit und Steifigkeit bei gleichzeitig geringem
Gewicht und kleinen Bauraum erfordern. Der folgende Beitrag beschreibt
eine softwaregestützte Auslegung dieser Getriebe. Basierend auf der Getriebekinematik
wird dabei die konjugierte Verzahnung der Getriebebauteile
generiert.

Design of a strain wave gearing
Harmonic Drives are uniformly high-reduction, coaxial gearboxes in which a
flexible, elastically deformed gear is installed. They are used in applications
where gears with high accuracy and stiffness, combined with low weight and
installation space, are required. The following article outlines a softwarebased
approach for designing these gearboxes, which involves generating
the conjugate gearing of the gear components based on their kinematics.
Nützt uns die KI beim Mechanismenentwurf?
Authors: Irlinger Franz
Published: September 2024

Artikel, Anschauungsmodellen und durch Weitergabe in Form von Vorlesungen
und Schulungen durch Experten. Zunehmend werden nun
auch elektronische Medien genutzt. Aber neben der reinen Speicherung
ist natürlich auch die Abrufbarkeit, Aufbereitung und Vermittlung immer
wichtiger. Der Artikel versucht einen Überblick über die Aufgaben,
Methoden und den aktuellen Stand der Wissensrepräsentation im
Bereich des Entwurfs von Mechanismen zu geben und zu identifizieren
in welchen Bereichen der Ingenieur einen Beitrag liefern könnte.

Does AI help us with mechanism design? / Abstract
For decades, knowledge was stored in books, articles, illustrative models
and passed on in the form of lectures and training courses by experts.
Electronic media are now increasingly being used. However, in addition
to pure storage, retrievability, processing and communication are also
becoming increasingly important. This article attempts to provide an
overview of the tasks, methods and current status of knowledge
representation in the field of mechanism design and to identify the areas
in which engineers could make a contribution.
Automatische Konstruktion eines Viergelenkgetriebes für ein Klappmesser mithilfe der SG-Library
Authors: Huber Markus , Irlinger Franz , Lüth Tim
Published: September 2024

Im folgenden Beitrag soll gezeigt werden, wie die automatischen Konstruktionsfunktionen
der Matlab-Bibliothek SG-Library genutzt werden
können, um ein Viergelenkgetriebe zu Entwerfen und zu Konstruieren.
Als Anwendungsbeispiel wird hierfür ein Klapptaschenmesser verwendet.
Ausgangslage für die automatische Konstruktion ist die gewünschte
2D-Kontur der Griffschale und die 2D-Klingenkontur. Diese beiden Konturen
sind notwendig, um passende Gestellpunkte auf der Griffschale
und Anlenkpunkte auf der Klinge zu finden. Ebenfalls werden für die Klinge
zwei Posen vorgegeben, welche das Viergelenk exakt erreichen soll.
Als letzte Vorgabe wird der Funktion ein Bereich übergeben, welchen
die Klingenkontur nicht berühren darf, um die Sicherheit der Finger des
Benutzers sicherzustellen und den Lösungsraum einzuschränken. Die
Software rastert nun den Lösungsraum, berechnet alle möglichen Kombinationen
und filtert diese auf ihre Tauglichkeit für den Anwendungsfall.
Anschließend kann der Nutzer sich Animationen der Lösungen ansehen
und seine präferierte Lösung auswählen. Da nicht alle Komponenten
des Viergelenks in der selben Ebene liegen können, wird im nächsten
Schritt die Schichtung der Bauteile festgelegt. Nun können alle Bauteile
kollisionsfrei auskonstruiert werden und die Bauteile als STL-Dateien
abgespeichert werden. Abschließend kann diese mechanische Konstruktion
für den Anwendungsfall und das Fertigungsverfahren optimiert
werden und in die Griffschalen des Messers eingebaut werden.

Automatic Construction of a Four-Bar Linkage for a Folding Knife
using the SG-Library
The following article will show how the automatic design functions of
the Matlab library SG-Library can be used to design and construct a
four-bar linkage. A folding pocket knife is used as an application example.
The starting point for the automatic design is the desired 2D contour
of the handle shell and the 2D blade contour. These two contours are
necessary to find suitable frame points on the handle scales and pivot
points on the blade. Two poses are also specified for the blade, which
the four-bar linkage should achieve exactly. Finally, the function is given
an area that the blade contour must not touch in order to limit the solution
space and ensure the safety of the user’s fingers. The software now
grids the solution space and calculates all possible combinations and
filters them for their suitability for the application. The user can then
view animations of the solutions and select their preferred solution. As
not all components of the four-bar linkage can work in the same plane,
the layering of the components is defined in the next step. Now all
components can be designed collision-free and the components can
be saved as STL files. Finally, this mechanical design can be optimized
for the application and the manufacturing process and installed in the
handle scales of the knife.
Vier Wege zum Ball’schen Punkt
Authors: Gössner Stefan
Published: September 2024

Ausgehend von der Betrachtung der Bahnkrümmung eines Punktes der
bewegten Ebene wird über den Wendekreis und die Gleichung von
Euler-Savary die Kreispunktkurve hergeleitet. Im Schnittpunkt dieser
Kurve mit dem Wendekreis liegt der Ballsche Punkt, der von hoher
praktischer Bedeutung für die Maßsynthese von Koppelmechanismen
ist. In einem anschaulichen Beispiel wird das Vorgehen demonstriert
und drei weiteren Verfahren gegenübergestellt.
Die Betrachtung bedient sich der symplektische Geometrie im Vektorraum
ℝ 2 als innovativer Ansatz.

Four Ways to Ball’s Point.
Discussing the curvature of a point on the moving plane, the circlepoint-
curve is derived via inflection circle and the equation of Euler-
Savary. Ball’s point, which is of high practical importance in mechanism
design, lies at the point of intersection of circle-point-curve and inflection
circle. There are three more ways to determine Ball’s point, which
are presented briefly in an illustrative mechanism example.
Symplectic geometry in vector space ℝ 2 is used for the derivation as a
new innovative approach.
Untersuchung von Methoden zur Synthese von Pick-and-Place Bewegungen
Authors: Steinert Georg , Majschak Jens-Peter
Published: September 2024

Dieser Betrag beleuchtet Methoden zur Synthese von Bewegungen für
Pick-and-Place Aufgaben. Solche Aufgaben treten in Verarbeitungsmaschinen
zunehmend auf. Dabei werden je nach Anwendungsfall verschiedene
Anforderungen an das Bewegungsdesign gestellt. Es existieren
viele verschiedene Ansätze zur Synthese einer Pick-and-Place Bewegung.
Anhand eines konkreten Anwendungsfalls werden, basierend
auf einem Bewegungsplan, Bewegungsdesigns mit Hilfe der verschiedenen
Methoden berechnet. Diese werden anschließend anhand verschiedener
Kriterien beurteilt und eingeordnet.

Investigation of methods for the synthesis of pick-and-place motions.
This article examines methods for the synthesis of motions for
pick-and-place tasks. Those tasks are increasingly encountered in processing
machines. Depending on the application, different aspects on
the motion design are required. Consequently, there are various approaches
to the synthesis of a pick-and-place motion. Based on a specific
application and a motion plan, motion designs are calculated using
the various methods. These are assessed and categorised using various
criteria.
Parameterstudie zur gezielten Rekonfiguration nachgiebiger Mechanismen
Authors: Platl Vivien , Zentner Lena
Published: September 2024

Nachgiebige Mechanismen besitzen im gefertigten Zustand für ihre
Anwendung optimale, aber unveränderliche Eigenschaften. Eine gezielte
Rekonfiguration während ihres Einsatzes ermöglicht die Erschließung
neuer Anwendungsgebiete. Deswegen wurden erste Parameterstudien
durchgeführt, welche die Auswirkung einer gezielten kontinuierlichen
Rekonfiguration auf die Eigenfrequenzen nachgiebiger Mechanismen
aufzeigen sollen.

Parameter study for the targeted reconfiguration of compliant mechanisms
In their finished state, compliant mechanisms have optimal but unchangeable
properties for their application. Targeted reconfiguration during
their use would make it possible to open up new areas of application.
For this reason, initial parameter studies were carried out to show the
effect of targeted continuous reconfiguration on the natural frequencies
of compliant mechanisms.
Die Software Mechanism Developer - nun verfügbar für Lehre und Industrie
Authors: Brünjes Vincent , Hüsing Mathias , Corves Burkhard
Published: September 2024

Am Institut für Getriebetechnik, Maschinendynamik und Robotik der
RWTH Aachen wird seit einiger Zeit die Software „Mechanism
Developer“ (MechDev) zur interaktiven Auslegung und Analyse von
ebenen Getrieben entwickelt [1-2] und dessen aktuelle Fortschritte regelmäßig
publiziert [3-5]. Diese Software ist ab sofort allgemein verfügbar
und lizenzierbar. MechDev wird sowohl für Lehrzwecke als auch für
industrielle Anwendungen empfohlen. Kern der Software ist ein leistungsfähiges
Analysetool zur kinematischen und kinetostatischen Analyse
ebener ungleichmäßig übersetzender Getriebe, welches ständig
weiterentwickelt wird.

The Software Mechanism Developer – now available for Education
and Industry.
The Institute of Mechanism Theory, Machine Dynamics and Robotics of
RWTH Aachen University has been developing the Mechanism Developer (MechDev) software for the interactive design and analysis
of planar transmissions for some time [1-2] and regularly publishes its
current progress [3-5]. This software is now generally available to the
public. MechDev is recommended for educational purposes as well as
for industrial applications. The core features of the software constitute a
powerful toolkit for the kinematic and kinetostatic analysis of planar
linkages, which is constantly being improved on.
Entwurf von topologieoptimierten nachgiebigen Beinen für vierbeinige Roboter
Authors: Sun Yilun , Lüth Tim C.
Published: September 2024

Roboterbeine sind eine wichtige Komponente des vierbeinigen Roboters,
um verschiedene Bewegungsabläufe zu ermöglichen. Obwohl die
konventionellen, auf starren Gelenken basierenden Beine im Allgemeinen
robuste Bewegungen ausführen können, haben sie immer noch das
Problem der schlechten Abdichtung, wenn sie in komplexem und flüssigem
Terrain eingesetzt werden. Um dieses Problem zu lösen, wurden in
den letzten Jahren vollständig nachgiebige Beine mit monolithischer
Struktur eingeführt, um die Kompaktheit des Systems und die strukturelle
Nachgiebigkeit von vierbeinigen Robotern zu verbessern. In dieser Arbeit
stellen wir eine auf Topologie-Optimierung basierende Methode vor,
um ein effizientes Design von nachgiebigen Roboterbeinen zu erreichen.
Um die strukturelle Steifigkeit und die Biegeflexibilität des realisierten
Beins auszugleichen, wird ein multi-objektiver Optimierungsalgorithmus
verwendet. Eine Reihe von Entwurfsfällen wird vorgestellt, um das Entwurfsprinzip
und das analytische Verfahren der beschriebenen Methode
zu veranschaulichen. Die Ergebnisse haben gezeigt, dass ein vierbeiniger
Roboter mit den optimierten Beinen erfolgreich stabile und kontinuierliche
geradlinige Gehbewegungen ausführen kann.

Design of topology-optimized compliant legs for quadruped robots
Robotic legs are an important component of the quadruped robot for
achieving different motion gaits. Although the conventional rigid-linkbased
legs can generally perform robust motions, they still have the issues
with poor sealing when operating in complex and liquid terrains. To
cope with this problem, fully compliant legs with monolithic structure have
been introduced in recent years to improve the system compactness and
structural compliance of quadruped robots. In this work, we present a
topology-optimization-based method to achieve efficient design of compliant
robotic legs. In order to balance the structural stiffness and bending
flexibility of the realized leg, a multi-objective optimization algorithm is
utilized. A series of design cases are presented to illustrate the design
principle and analytical procedure of the proposed method. In addition,
experimental evaluation is also performed, and the results have demonstrated
that, a quadruped robot with the optimized legs can successfully
achieve stable and continuous straight-line walking motions.
Validierung einer energieeffizienten Antriebsmethode von Kurvengetrieben an einem Prüfstand
Authors: Knobloch Thomas , Kaboth Lukas , Asgarzade Rufat , Hüsing Mathias , Corves Burkhard
Published: September 2024

Vor dem Hintergrund des Klimawandels, sich wandelnder Gesetzgebung
und gestiegenen Ansprüchen an die Energieeffizienz ist die Industrie stetig
auf der Suche nach Potenzialen zur Kostenminimierung. Nicht nur in der
Verpackungsindustrie, sondern auch in den Bereichen der Handhabungsund
Umformtechnik werden zum Großteil ungleichmäßig übersetzende Getriebe
zur Erzeugung bestimmter Bewegungsabläufe genutzt. Schon seit
mehreren Jahrzehnten gibt es Ansätze, derartige Getriebe energieeffizienter
zu betreiben, wobei die sogenannte Eigenbewegung vielversprechend
ist. Die praktische Umsetzung in der Industrie ist mit der Entwicklung von
Servomotoren möglich geworden, da sie die Eigenbewegung mit hoher
Genauigkeit abbilden können. Die Kombination aus ungleichmäßig übersetzenden
Getrieben und einer variablen Antriebsgeschwindigkeit ist seitdem
Gegenstand der Forschung. Dieser Beitrag präsentiert den Vergleich und
die Diskussion der Messergebnisse eines Kurvengetriebes, das einmal
konstant und zum anderen servogesteuert angetrieben wird, so dass damit
das Kurvengetriebe effizienter betrieben wird.

Validation of an Energy-efficient Drive Method for Cam Mechanisms
on a Test Bench
Due to the climate change, changing legislation and increased demands
on energy efficiency, the industry is constantly looking for ways to minimise
costs. Not only in the packaging industry, but also in the fields of handling
and forming technology, non-uniformly translating mechanisms are used
to generate certain motions. For several decades now, there have been
attempts to operate such mechanisms in a more energy-efficient manner,
with so-called Eigenmotion being a promising approach. Practical implementation
in industry has become possible with the development of servo
motors, as they can reproduce the Eigenmotion with high precision. The
combination of non-uniformly translating mechanisms and a variable drive
speed has been the subject of research ever since. This article presents
a comparison and discussion of the measurement results of a cam mechanism
driven at a constant angular velocity and an energy-efficient cam
mechanism.
REVOLUTIONIZING EDUCATION: ASSESSING THE IMPACT OF MOBILE LEARNING APPS ON ACADEMIC SUCCESS AND ATTITUDES
Authors:   The National Research Center for Giftedness and Creativity, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia, AlAli Rommel
Published: September 2024

This study examines the impact of mobile learning applications on the academic achievement of gifted students and their attitudes toward mobile learning. A quasi-experimental research design was employed. The study population consisted of all gifted eleventh-grade students in the Al-Ahsa region during the first semester of the 2023-2024 academic year. The study sample included 81 gifted male and female students. The experimental group received instruction based on a mobile learning strategy, while the control group participated in traditional classroom settings. Two instruments were developed to evaluate different aspects. The first tool aimed to examine the impact of mobile learning applications on student achievement and was designed based on the course content, while the second tool was a questionnaire to measure participants' attitudes towards mobile learning. The results revealed statistically significant differences between the average academic achievement of gifted students in the experimental group, who learned using mobile learning, and the average achievement of gifted students in the control group, who learned in the usual way. The difference was in favor of the experimental group. Additionally, there were statistically significant differences between the average level of attitudes toward mobile learning (including dimensions such as satisfaction, impact on learning, motivation, and ease of use) among gifted students in the experimental group and the average level of attitudes toward mobile learning among students in the control group. The difference was also in favor of the experimental group. These findings suggest that the integration of mobile learning applications can have a positive impact on the academic achievement of gifted students and their attitudes towards this learning approach. The study highlights the potential of mobile learning technologies to enhance the educational experiences and outcomes of gifted learners.
Klasifikacija ugovora ratione personae i pravna sigurnost
Authors: Šafranko Zvonimir
Published: September 2024

U radu se analiziraju pojedine pozitivnopravne kategorije ugovora ratione personae: 1.) trgovački ugovori, 2.) ugovori između trgovaca, 3.) ugovori između trgovaca i osoba javnog prava, 4.) tzv. poslovne transakcije između poduzetnika, 5.) poslovne transakcije između poduzetnika i osoba javnog prava te 6.) potrošački ugovori, kao i njihovi konstitutivni elementi te opseg odstupanja pravila koja ih determiniraju u odnosu na pravno uređenje opće kategorije ugovora, odnosno ugovore građanskog prava. Posebna se pozornost upućuje na određene anomalije, nelogičnosti i preklapanja kod pojedinih ugovornih kategorija. Nadalje, raspravlja se o određenim sudionicima u pravnom prometu s nastojanjem konkretizacije njihovog statusa u konkretnim ugovornim odnosima. Konačno, iznose se određeni problemi u vezi s izloženom klasifikacijom ugovora te osobito njihovi učinci na sigurnost u pravnom prometu. Zaključno, predlaže se u kojem bi se smjeru mogle kretati zakonodavne intervencije glede pravnog uređenja pojedinih ugovornih kategorija de lege ferenda, kako bi se uklonio niz dvojbi i nejasnoća te s time u vezi unaprijedila sigurnost u pravnom prometu kod ugovornih odnosa.