Laser treatment of high-performance Kynol fibers: An example as alternative tool for coloration and imaging on surfaces of high-performance fibers

Novolac resins are used to prepare high-performance flame-retardant fibers, which are also supplied under the brand name Kynol fibers. In the current study, Kynol fiber materials are treated with a laser beam to introduce dark coloration at distinct areas on the textile surface. By this, imaging and writing on the textile surface is possible. For investigation, two different types of Kynol fiber materials are used - a non-woven fiber felt and a woven fabric. It is shown that a laser treatment of medium intensity can introduce a change to dark coloration with good rubbing fastness. The writing of letters and symbols onto fabrics is possible. However, treatments with strong laser intensity lead to significant fiber damages and low rubbing fastness. Nevertheless, the presented method is a promising tool to apply images onto flame retardant fabrics from high performance fibers, which are difficult to dye using conventional techniques of dyeing and printing.

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Comparative analysis results in different types of vitreous floaters laser treatment

Modern technologies in ophtalmology ◽

10.25276/2312-4911-2020-2-45-49 ◽

2020 ◽

pp. 45-49

Author(s):

B.A. Normaev ◽

◽

A.V. Doga ◽

D.A. Buryakov ◽

◽

...

Keyword(s):

Comparative Analysis ◽

Laser Treatment ◽

Vitreous Floaters ◽

Different Types

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Multiple objects tracking in the UAV system based on hierarchical deep high-resolution network

Multimedia Tools and Applications ◽

10.1007/s11042-020-10427-1 ◽

2021 ◽

Author(s):

Wei Huang ◽

Xiaoshu Zhou ◽

Mingchao Dong ◽

Huaiyu Xu

Keyword(s):

High Resolution ◽

Object Tracking ◽

High Performance ◽

State Of The Art ◽

Class Imbalance ◽

Unified Framework ◽

Multiple Objects ◽

Tracking Process ◽

Objects Tracking ◽

Different Types

AbstractRobust and high-performance visual multi-object tracking is a big challenge in computer vision, especially in a drone scenario. In this paper, an online Multi-Object Tracking (MOT) approach in the UAV system is proposed to handle small target detections and class imbalance challenges, which integrates the merits of deep high-resolution representation network and data association method in a unified framework. Specifically, while applying tracking-by-detection architecture to our tracking framework, a Hierarchical Deep High-resolution network (HDHNet) is proposed, which encourages the model to handle different types and scales of targets, and extract more effective and comprehensive features during online learning. After that, the extracted features are fed into different prediction networks for interesting targets recognition. Besides, an adjustable fusion loss function is proposed by combining focal loss and GIoU loss to solve the problems of class imbalance and hard samples. During the tracking process, these detection results are applied to an improved DeepSORT MOT algorithm in each frame, which is available to make full use of the target appearance features to match one by one on a practical basis. The experimental results on the VisDrone2019 MOT benchmark show that the proposed UAV MOT system achieves the highest accuracy and the best robustness compared with state-of-the-art methods.

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New Class of Trimetallic Oxide Hierarchical Mesoporous Array on Woven Fabric: Electrode for high-Performance and Stable battery type Ultracapacitor

Journal of Energy Storage ◽

10.1016/j.est.2021.102249 ◽

2021 ◽

Vol 35 ◽

pp. 102249

Author(s):

S. Thakur ◽

S. Maiti ◽

K. Sardar ◽

N. Besra ◽

P. Bairi ◽

...

Keyword(s):

High Performance ◽

Woven Fabric ◽

New Class

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Photochemical stability of warfarin potassium in powdered pharmaceutical tablets

Bio-Medical Materials and Engineering ◽

10.3233/bme-201167 ◽

2021 ◽

Vol 32 (2) ◽

pp. 115-129

Author(s):

Emi Horiguchi-Babamoto ◽

Makoto Otsuka

Keyword(s):

High Performance ◽

Partial Least Squares Regression ◽

Pediatric Patients ◽

Reversed Phase ◽

Least Squares Regression ◽

Brand Name ◽

Pharmaceutical Tablets ◽

Light Stability ◽

Warfarin Potassium ◽

The Stability

BACKGROUND: Warfarin potassium (Wf) commercial tablets originally formulated for adults are ground before administration to pediatric patients and elderly patients with dysphagia. OBJECTIVE: The present study investigated the effect of tablet grinding on the photostability of four types of commercial Wf tablets and predicted the photostability of the tablet powders by chemometric analysis. METHODS: The photodegradation of Wf content was evaluated by reversed-phase column high-performance liquid chromatography with ultraviolet (HPLC-UV). RESULTS: The bulk Wf powder was relatively photostable, whereas ground Wf tablets underwent substantial photodegradation. The photostability of the ground powders of a brand-name Wf commercial tablet and three generic Wf commercial tablets was quantitatively assessed and compared. In certain cases, the Wf in all the three ground generic tablets was less photostable than in the ground brand-name tablets. After 28 days of light irradiation, the Wf content decreased to 69.79% in the brand-name tablets, while it was 31.90% in some generic tablets. To clarify the factors influencing the relative photostability in various Wf formulations, we analyzed the intermolecular interactions between the active ingredient and the excipients by partial least-squares regression analysis based on photostability screening for each additive. CONCLUSION: The results suggested that the additives light anhydrous silicic acid and povidone adversely affect the stability of Wf tablets. In addition, the light stability of ground tablets was affected considerably by their formulation.

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A yeast metabolome-based model for an ecotoxicological approach in the management of lignocellulosic ethanol stillage

Royal Society Open Science ◽

10.1098/rsos.180718 ◽

2019 ◽

Vol 6 (1) ◽

pp. 180718 ◽

Cited By ~ 3

Author(s):

Luca Roscini ◽

Lorenzo Favaro ◽

Laura Corte ◽

Lorenzo Cagnin ◽

Claudia Colabella ◽

...

Keyword(s):

Heavy Metals ◽

Saccharomyces Cerevisiae ◽

Predictive Model ◽

Lignocellulosic Ethanol ◽

Bioethanol Production ◽

Inhibitor Concentration ◽

Promising Tool ◽

Different Types ◽

The Relationship ◽

Ecotoxicological Bioassay

Lignocellulosic bioethanol production results in huge amounts of stillage, a potentially polluting by-product. Stillage, rich in heavy metals and, mainly, inhibitors, requires specific toxicity studies to be adequately managed. To this purpose, we applied an FTIR ecotoxicological bioassay to evaluate the toxicity of lignocellulosic stillage. Two weak acids and furans, most frequently found in lignocellulosic stillage, have been tested in different mixtures against three Saccharomyces cerevisiae strains. The metabolomic reaction of the test microbes and the mortality induced at various levels of inhibitor concentration showed that the strains are representative of three different types of response. Furthermore, the relationship between concentrations and FTIR synthetic stress indexes has been studied, with the aim of defining a model able to predict the concentrations of inhibitors in stillage, resulting in an optimized predictive model for all the strains. This approach represents a promising tool to support the ecotoxicological management of lignocellulosic stillage.

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Bejan’s Constructal Theory Analysis of Gas-Liquid Cooled Finned Modules

Journal of Heat Transfer ◽

10.1115/1.4003556 ◽

2011 ◽

Vol 133 (7) ◽

Cited By ~ 14

Author(s):

Giulio Lorenzini ◽

Simone Moretti

Keyword(s):

Thermal Behavior ◽

Heat Exchangers ◽

High Performance ◽

Numerical Study ◽

Constructal Theory ◽

Electronic Components ◽

Theory Analysis ◽

Pressure Losses ◽

Different Types ◽

Overall Performance

High performance heat exchangers represent nowadays the key of success to go on with the trend of miniaturizing electronic components as requested by the industry. This numerical study, based on Bejan’s Constructal theory, analyzes the thermal behavior of heat removing fin modules, comparing their performances when operating with different types of fluids. In particular, the simulations involve air and water (as representative of gases and liquids), to understand the actual benefits of employing a less heat conductive fluid involving smaller pressure losses or vice versa. The analysis parameters typical of a Constructal description (such as conductance or Overall Performance Coefficient) show that significantly improved performances may be achieved when using water, even if an unavoidable increase in pressure losses affects the liquid-refrigerated case. Considering the overall performance: if the parameter called Relevance tends to 0, air prevails; if it tends to 1, water prevails; if its value is about 0.5, water prevails in most of the case studies.

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