Modeling Short-Range Interactions in Concentrated Newtonian Fiber Bundle Suspensions

2021 ◽  
Vol 36 (3) ◽  
pp. 255-263
Author(s):  
N. Meyer ◽  
A. N. Hrymak ◽  
L. Kärger
Keyword(s):  
Short Range ◽  
Development Process ◽  
Contact Point ◽  
Separation Distance ◽  
Fiber Bundles ◽  
Fiber Architecture ◽  
Simulation Framework ◽  
Transient Rheology ◽  
Speed Up ◽  
Cost Efficient

Abstract Sheet Molding Compounds (SMC) offer a cost efficient way to enhance mechanical properties of a polymer with long discontinuous fibers, while maintaining formability to integrate functions, such as ribs, beads or other structural reinforcements. During SMC manufacturing, fibers remain often in a bundled configuration and the resulting fiber architecture determines part properties. Accurate prediction of this architecture by simulation of flow under consideration of the transient rheology and transient fiber orientations can speed up the development process. In particular, the interaction of bundles is of significance to predict molding pressures correctly in a direct simulation approach, which resolves individual fiber bundles. Thus, this work investigates the tangential short-range lubrication forces between fiber bundles with analytical and numerical techniques. A relation between the effective sheared gap between bundles and the bundle separation distance at the contact point is found and compared to experimental results from literature. The result is implemented in an ABAQUS contact subroutine to incorporate short-range interactions in a direct bundle simulation framework.

scholarly journals Anti-Reflection Nanostructures on Tempered Glass by Dynamic Beam Shaping

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 289
Author(s):  
Petr Hauschwitz ◽  
Jan Brajer ◽  
Danijela Rostohar ◽  
Jaromír Kopeček ◽  
Tomáš Mocek ◽  
...  
Keyword(s):  
Mobile Phones ◽  
Thermal Damage ◽  
Pulsed Laser ◽  
Processing Parameters ◽  
Beam Shaping ◽  
Separation Distance ◽  
Tempered Glass ◽  
Fundamental Wavelength ◽  
Speed Up ◽  
Scanning Head

Reflectivity and surface topography of tempered glass were modified without any thermal damage to the surroundings by utilizing 1.7 ps ultrashort pulsed laser on its fundamental wavelength of 1030 nm. To speed up the fabrication, a dynamic beam shaping unit combined with a galvanometer scanning head was applied to divide the initial laser beam into a matrix of beamlets with adjustable beamlets number and separation distance. By tuning the laser and processing parameters, reflected intensity can be reduced up to 75% while maintaining 90% of transparency thus showing great potential for display functionalization of mobile phones or laptops.

Technological Knowledge Transfer

1992 ◽  
Vol 6 (2) ◽  
pp. 105-108
Author(s):  
Jacob Sajet
Keyword(s):  
Knowledge Transfer ◽  
Development Process ◽  
Scaling Up ◽  
Technological Knowledge ◽  
Early Stages ◽  
Speed Up ◽  
The University

The article examines the university-enterprise relationship through six scenarios. Consistent problems, such as the reluctance of industry to become involved in the early stages of a project and the tendency of universities to be relatively uninterested in scaling up, are outlined. Various solutions are proposed, such as the establishment of ‘incubator-type’ units within universities in order to speed up the development process.

scholarly journals An integrated platform for intuitive mathematical programming modeling using LaTeX

2018 ◽  
Vol 4 ◽  
pp. e161 ◽  
Author(s):  
Charalampos P. Triantafyllidis ◽  
Lazaros G. Papageorgiou
Keyword(s):  
Mathematical Programming ◽  
Error Detection ◽  
Development Process ◽  
Optimization Problems ◽  
Scientific Work ◽  
Input Language ◽  
Speed Up ◽  
Cross Platform ◽  
Algebraic Modeling Language ◽  
Friendly Graphical User Interface

This paper presents a novel prototype platform that uses the same LaTeX mark-up language, commonly used to typeset mathematical content, as an input language for modeling optimization problems of various classes. The platform converts the LaTeX model into a formal Algebraic Modeling Language (AML) representation based on Pyomo through a parsing engine written in Python and solves by either via NEOS server or locally installed solvers, using a friendly Graphical User Interface (GUI). The distinct advantages of our approach can be summarized in (i) simplification and speed-up of the model design and development process (ii) non-commercial character (iii) cross-platform support (iv) easier typo and logic error detection in the description of the models and (v) minimization of working knowledge of programming and AMLs to perform mathematical programming modeling. Overall, this is a presentation of a complete workable scheme on using LaTeX for mathematical programming modeling which assists in furthering our ability to reproduce and replicate scientific work.

scholarly journals Intrinsic Run-time Row Hammer PUFs: Leveraging the Row Hammer Effect for Run-Time Cryptography and Improved Security

2018 ◽  
Author(s):  
Nikolaos Athanasios Anagnostopoulos ◽  
Tolga Arul ◽  
Yufan Fan ◽  
Christian Hatzfeld ◽  
André Schaller ◽  
...  
Keyword(s):  
Random Access ◽  
Physical Unclonable Functions ◽  
Generation Times ◽  
Speed Up ◽  
Run Time ◽  
Commercial Off The Shelf ◽  
Cost Efficient ◽  
Statistical Relationships ◽  
The Times ◽  
Time Required

Physical Unclonable Functions (PUFs) based on the retention times of the cells of a Dynamic Random Access Memory (DRAM) can be utilised for the implementation of cost-efficient and lightweight cryptographic protocols. However, as recent work has demonstrated, the times needed in order to generate their responses may prohibit their widespread usage. In order to address this issue, the Row Hammer PUF has been proposed by Schaller et al. [1], which leverages the row hammer effect in DRAM modules to reduce the retention times of their cells and, therefore, significantly speed up the generation times for the responses of PUFs based on these retention times. In this work, we extend the work of Schaller et al. by presenting a run-time accessible implementation of this PUF and further reducing the time required for the generation of its responses. Additionally, we also provide a more thorough investigation of the effects of temperature variations on the the Row Hammer PUF and briefly discuss potential statistical relationships between the cells used to implement it. As our results prove, the Row Hammer PUF could potentially provide an adequate level of security for Commercial Off-The-Shelf (COTS) devices, if its dependency on temperature is mitigated, and, may therefore, be commercially adopted in the near future.

Enabling the Interoperability of the Modelica DSL and Matlab Simulink towards the Development of Self-Adaptive Dynamic Systems

2018 ◽  
Vol 7 (4) ◽  
pp. 54-75
Author(s):  
Nikolay Tcholtchev ◽  
Grit Dudeck ◽  
Michael Wagner ◽  
Christian Hein ◽  
Arun Prakash ◽  
...  
Keyword(s):  
Development Process ◽  
System Development ◽  
Efficient Design ◽  
Matlab Simulink ◽  
Adaptive Dynamic ◽  
Domain Specific ◽  
Current Article ◽  
Cost Efficient ◽  
Self Adaptive

Domain Specific Languages (DSL) are an important concept that is used in industry, in order to enable the fast and cost-efficient design of specific functions/components, and/or to target particular aspects of the systems' development and operation. In the current article, the authors describe their experiences on the integration of the Modelica DSL into a platform that enables the integration and interoperability of model-based tools across the various phases of the system development process. Furthermore, it is illustrated how Matlab Simulink can be used in parallel in the course of the same system design undertaking. Thereby, the authors present their approach and compare different tools which were used, in order to efficiently complete the integration, and finally exemplify the outcome on a case study related to a self-adaptive dynamic system from the automotive domain.

scholarly journals A Pattern-Based Method for Re-Engineering Non-Ontological Resources into Ontologies

2010 ◽  
Vol 6 (4) ◽  
pp. 27-63 ◽  
Author(s):  
Boris Carmen Villazón-Terrazas ◽  
Mari Suárez-Figueroa ◽  
Asunción Gómez-Pérez
Keyword(s):  
Data Model ◽  
Development Process ◽  
Storage System ◽  
Ontology Development ◽  
Software Library ◽  
Process Ontology ◽  
Classification Schemes ◽  
Speed Up ◽  
And Storage

To speed up the ontology development process, ontology developers are reusing all available ontological and non-ontological resources, such as classification schemes, thesauri, lexicons, and so forth, that have already reached some consensus. Non-ontological resources are highly heterogeneous in their data model and storage system (or implementation). The reuse of these non-ontological resources involves their re-engineering into ontologies. This paper presents a method for re-engineering non-ontological resources into ontologies. The method is based on so-called re-engineering patterns, which define a procedure that transforms the non-ontological resource components into ontology representational primitives using WordNet for making explicit the relations among the non-ontological resource terms. The paper also provides the description of NOR2O, a software library that implements the transformations suggested by the patterns. Finally, it depicts an evaluation of the method, patterns, and software library proposed.

scholarly journals Effect of spatial characteristics on campus open space uses of youth: Example of KTU Kanuni CampusGençlerin kampüs açık mekân kullanımlarına mekânsal özelliklerin etkisi: KTÜ Kanuni Kampüsü örneği

2017 ◽  
Vol 14 (3) ◽  
pp. 2417
Author(s):  
Tuğba Düzenli ◽  
Elif Merve Alpak ◽  
Ali Özbilen
Keyword(s):  
Young People ◽  
Open Space ◽  
Development Process ◽  
Personality Development ◽  
Environmental Design ◽  
Open Spaces ◽  
University Campuses ◽  
Friendship Relations ◽  
Speed Up ◽  
Positive Effect

It is necessary to assess the environment in terms of the development of young people; Young people need to spend time in appropriate places to speed up the development process and increase the influence of the youth process on personality development. When assessed from the perspective of environmental design, university campuses are one of the most important places where young people's friendship relations intensify and social roles begin to develop as well as to acquire skills related to their professions. In this study, open spaces of Karadeniz Technical University Kanuni Campus were first classified in terms of the characteristics (mobility, naturalness, openness) that should be possessed by the youth places determined in the literature and then the use of youth was observed in these places. 3 of them were high in terms of the determined characteristics and 3 were low. A total of 6 campus locations were observed and how young people used the spaces. As a result, it was found that spaces with higher levels of characteristics were more successful, more used by younger people, and group use was more intense. In other words, mobility, naturalness and openness were found to have a positive effect on campus.Extended English abstract is in the end of PDF (TURKISH) file. ÖzetGençlerin gelişimi açısından çevreyi değerlendirmek gereklidir; gençlerin gelişim sürecini hızlandırmak, gençlik sürecinin kişilik gelişimine etkisini arttırmak için uygun mekânlarda zaman geçirmeleri gerekir. Çevre tasarımı açısından değerlendirildiğinde, meslekleriyle ilgili donanımlarını kazanmaları yanında gençlerin arkadaşlık ilişkilerinin yoğunlaştığı ve sosyal roller geliştirmeye başladığı önemli mekânlardan biri de üniversite kampüsleridir. Bu çalışmada da Karadeniz Teknik Üniversitesi Kanuni Kampüsü açık mekânları önce literatürden belirlenen genç mekânlarının sahip olması gereken özellikler (hareketlilik, doğallık, açıklık) bakımından sınıflandırılmış, daha sonra bu mekânlarda gençlerin kullanımları gözlemlenmiştir. 3’ü belirlenen özellikler bakımından yüksek, 3 ü düşük olmak üzere toplam 6 kampüs mekânında davranış gözlemi yapılmış, gençlerin mekânları nasıl kullandığı incelenmiştir. Sonuçta özellikler açısından düzeyleri yüksek olan mekânların dahabaşarılı olduğu ve daha çok genç tarafından kullanıldığı ve grup kullanımının yoğunluktaolduğu ortaya çıkmıştır. Yani hareketlilik, doğallık, açıklık özelliklerinin kampüs mekân kullanımını olumlu yönde etkilediği belirlenmiştir.// Annotate Highlight

scholarly journals Using NViz tool for Environmental Sensor Networks

1970 ◽  
Vol 7 (1) ◽  
pp. 52-58
Author(s):  
Anh-Vu Dinh-Duc
Keyword(s):  
Sensor Networks ◽  
Development Process ◽  
Wireless Sensor ◽  
Visualization Tool ◽  
Layered Architecture ◽  
Environmental Sensor Networks ◽  
The Status ◽  
Speed Up ◽  
Environmental Sensor ◽  
Visualization Tools

Visualization tools help users to observe the status of the Wireless Sensor Networks (WSNs). Although various visualization tools have been created for certain projects so far, these tools can only be used in certain scenarios, due to their hard-coded packet formats and network’s properties. To speed up development process, a visualization tool which can adapt to any kind of WSN is essentially necessary. A generalpurpose visualization tool - NViz, which can represent and visualize data for all WSN applications, is proposed. NViz allows user to set their network’s properties and packet formats through XML files. Based on properties defined, user can choose the meaning of them and let NViz represents the data respectively. Furthermore, a better Replay mechanism, which lets researchers and developers debug their WSN easily, is also integrated in this tool. NViz is designed based on a layered architecture which allows for clear and well-defined interrelationships and interfaces between each components. As a demonstration, NViz is used for designing an environmental sensor network.

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