scholarly journals SI-traceable frequency dissemination at 157206 nm in a stabilized fiber network with ring topology

2021 ◽  
Author(s):  
Dominik Husmann ◽  
Laurent-Guy Bernier ◽  
Mathieu Bertrand ◽  
Davide Calonico ◽  
Konstantinos Chaloulos ◽  
...  
Keyword(s):  
Ring Topology ◽  
Fiber Network

scholarly journals Single-Line Bidirectional Optical Add/Drop Multiplexer for Ring Topology Optical Fiber Networks

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2641
Author(s):  
Chung-Yi Li ◽  
Ching-Hung Chang ◽  
Zih-Guei Lin
Keyword(s):  
Optical Fiber ◽  
Optical Network ◽  
Optimal Solution ◽  
Single Line ◽  
Ring Topology ◽  
Fiber Network ◽  
Fiber Networks ◽  
Optical Fiber Networks ◽  
New Type ◽  
The Stability

A new type of passive single-line bidirectional optical add/drop multiplexer (SBOADM) is proposed and experimentally demonstrated. When the proposed SBOADM is placed as a node of a ring topology optical fiber network, the special routing function of the SBOADM can always drop down the desired downstream signals whether the signals are injected into the SBOADM in either the clockwise (CW) or counterclockwise (CCW) direction and can upload and send back the upstream signals via the reversed optical pathway of the downstream signals. Once fiber link failure occurs in the optical network, the blocked network connections can be recovered immediately by sending out the downstream signals in both the CW and CCW directions of the fiber ring. As in all passive devices, the SBOADM needs no power supply or complicated network management to achieve the bidirectional function. Thus, the proposed device is an optimal solution to enhance the stability and reliability of rapidly developed optical fiber networks.

scholarly journals Individualized plasticity autograft mimic with efficient bioactivity inducing osteogenesis

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yan Wei ◽  
Guixin Zhu ◽  
Zifan Zhao ◽  
Chengcheng Yin ◽  
Qin Zhao ◽  
...  
Keyword(s):  
Growth Factor ◽  
Bone Graft ◽  
Secondary Trauma ◽  
Bone Grafts ◽  
Bone Scaffold ◽  
Fiber Network ◽  
Marrow Mesenchymal Stem Cells ◽  
Limited Application ◽  
Osteogenic Induction ◽  
Scaffold Materials

AbstractMineralized tissue regeneration is an important and challenging part of the field of tissue engineering and regeneration. At present, autograft harvest procedures may cause secondary trauma to patients, while bone scaffold materials lack osteogenic activity, resulting in a limited application. Loaded with osteogenic induction growth factor can improve the osteoinductive performance of bone graft, but the explosive release of growth factor may also cause side effects. In this study, we innovatively used platelet-rich fibrin (PRF)-modified bone scaffolds (Bio-Oss®) to replace autograft, and used cytokine (BMP-2) to enhance osteogenesis. Encouragingly, this mixture, which we named “Autograft Mimic (AGM)”, has multiple functions and advantages. (1) The fiber network provided by PRF binds the entire bone scaffold together, thereby shaping the bone grafts and maintaining the space of the defect area. (2) The sustained release of BMP-2 from bone graft promoted bone regeneration continuously. (3) AGM recruited bone marrow mesenchymal stem cells (BMSCs) and promote their proliferation, migration, and osteogenic differentiation. Thus, AGM developed in this study can improve osteogenesis, and provide new guidance for the development of clinical bone grafts.

Stress-strain curve of paper revisited

2012 ◽  
Vol 27 (2) ◽  
pp. 318-328 ◽  
Author(s):  
Svetlana Borodulina ◽  
Artem Kulachenko ◽  
Mikael Nygårds ◽  
Sylvain Galland
Keyword(s):  
Three Dimensional ◽  
Strain Curve ◽  
Failure Behavior ◽  
Three Dimensional Model ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Fiber Network ◽  
Bonding Parameters ◽  
Particle Level ◽  
The Impact

Abstract We have investigated a relation between micromechanical processes and the stress-strain curve of a dry fiber network during tensile loading. By using a detailed particle-level simulation tool we investigate, among other things, the impact of “non-traditional” bonding parameters, such as compliance of bonding regions, work of separation and the actual number of effective bonds. This is probably the first three-dimensional model which is capable of simulating the fracture process of paper accounting for nonlinearities at the fiber level and bond failures. The failure behavior of the network considered in the study could be changed significantly by relatively small changes in bond strength, as compared to the scatter in bonding data found in the literature. We have identified that compliance of the bonding regions has a significant impact on network strength. By comparing networks with weak and strong bonds, we concluded that large local strains are the precursors of bond failures and not the other way around.

scholarly journals Reduced dispersibility of flushable wet wipes after wet storage

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Thomas Harter ◽  
Ingo Bernt ◽  
Stefanie Winkler ◽  
Ulrich Hirn
Keyword(s):  
Industrial Production ◽  
Short Fibre ◽  
Scientific Publications ◽  
Fiber Network ◽  
Sewage System ◽  
Wet Storage ◽  
Softwood Pulp ◽  
Wet Condition ◽  
Cellulosic Fibres

AbstractScientific publications and newsfeeds recently focused on flushable wet wipes and their role in sewage system blockages. It is stated that although products are marked as flushable, they do not disintegrate after being disposed of via the toilet. In this work it is shown that wetlaid hydroentangled wet wipes lose their initially good dispersive properties during their storage in wet condition. As a consequence, we are suggesting to add tests after defined times of wet storage when assessing the flushability of wet wipes. Loss of dispersibility is found for both, wet wipes from industrial production and wipes produced on pilot facilities. We found it quite surprising that the wet wipes’ dispersibility is deteriorating after storage in exactly the same liquid they are dispersed in, i.e. water. This is probably why the effect of wet storage has not been investigated earlier. It is demonstrated that the deteriorating dispersibility of these wipes is linked to the used type of short cellulosic fibres — only wipes containing unbleached softwood pulp as short fibre component were preserving good dispersibility during wet storage. Possible mechanisms that might be responsible are discussed, e.g. long term fiber swelling causing a tightening of the fiber network, or surface interdiffusion.

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