Elasticity and damping ratio measurement of droplets on super-hydrophobic surfaces

The measurement of the droplets’ elasticity is vitally important in microfluidic and ink-jet printing. It refers to the ability of the droplet to restore its original shape and strong robustness. This study investigated a novel method to measure elasticity. The plate coated with super-hydrophobic layers pressed on a droplet and the elastic force was recorded by an electronic balance. Meanwhile, a mathematical model was constructed to calculate the changes of the droplet area under the force. The measurement showed that external work mainly converts into surface energy and the damping ratio increases from 0.068 to 0.261 with the increase of mass fraction from 0 to 80 wt%. It also indicates that the novel method can accurately and efficiently measure the elasticity of droplets.

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Forward electrohydrodynamic inkjet printing of optical microlenses on microfluidic devices

Lab on a Chip ◽

10.1039/c5lc01386k ◽

2016 ◽

Vol 16 (2) ◽

pp. 326-333 ◽

Cited By ~ 59

Author(s):

V. Vespini ◽

S. Coppola ◽

M. Todino ◽

M. Paturzo ◽

V. Bianco ◽

...

Keyword(s):

Inkjet Printing ◽

Microfluidic Devices ◽

Ink Jet Printing ◽

Material Type ◽

Ink Jet ◽

Jet Printing ◽

Novel Method

We report a novel method for direct ink-jet printing of viscous polymers based on a pyro-electrohydrodynamic repulsion system capable of overcoming limitations of previous classical EHD ink-jet printing on the material type, geometry and thickness of the receiving substrate.

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Research on the Influence of Ink Surface Tension to the Formation of Ink Droplet

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.262.329 ◽

2012 ◽

Vol 262 ◽

pp. 329-333

Author(s):

Chun Jiang Jia ◽

Guang Xue Chen ◽

Xiao Zhou Li ◽

Lei Zhao

Keyword(s):

Mathematical Model ◽

Surface Tension ◽

Substrate Surface ◽

Digital Printing ◽

Satellite Droplet ◽

Ink Jet Printing ◽

Print Head ◽

Ink Jet ◽

Jet Printing ◽

The Relationship

Ink jet printing, as the key point of digital printing development, has already got some progress as technical be concerned, and also it has been used in industrial producing. But until now, ink jet printing still has some problems to be solved, include satellite droplet, droplet dimension, and spreading of droplet on substrate and so on. These problems involving parameters include dimension and geometry of the print-head, quality and characteristics of the control signal, surface tension of the ink, viscosity of the ink, characteristics of the substrate surface and so on. In this paper we just analysis the influence of ink surface tension to the process from jet to formation of the droplet by establishing mathematical model, but keep other parameters unchanged. At last, we get the relationship between ink surface tension and droplet parameters, so that it can be used as theoretical basement for print-head design and researching of ink.

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A Novel Method Produces Pd nanoparticles for Ink-Jet Printing Technology

2007 Digest of papers Microprocesses and Nanotechnology ◽

10.1109/imnc.2007.4456312 ◽

2007 ◽

Cited By ~ 1

Author(s):

C.C. Tseng ◽

J. L. Kuo ◽

C.P. Chang ◽

W. H. Hwu ◽

M.D. Ger

Keyword(s):

Pd Nanoparticles ◽

Printing Technology ◽

Ink Jet Printing ◽

Ink Jet ◽

Jet Printing ◽

Novel Method

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A novel method to produce Pd nanoparticle ink for ink-jet printing technology

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2009.02.026 ◽

2009 ◽

Vol 339 (1-3) ◽

pp. 206-210 ◽

Cited By ~ 30

Author(s):

Chun-Chieh Tseng ◽

Chang-Pin Chang ◽

Yuh Sung ◽

Yann-Cheng Chen ◽

Ming-Der Ger

Keyword(s):

Printing Technology ◽

Ink Jet Printing ◽

Pd Nanoparticle ◽

Ink Jet ◽

Jet Printing ◽

Novel Method ◽

Nanoparticle Ink

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A novel method for the determination of linting propensity of paper

TAPPI Journal ◽

10.32964/tj11.10.9 ◽

2012 ◽

Vol 11 (10) ◽

pp. 9-17

Author(s):

ALESSANDRA GERLI ◽

LEENDERT C. EIGENBROOD

Keyword(s):

Ash Content ◽

The Novel ◽

Offset Printing ◽

Excellent Correlation ◽

End Conditions ◽

Bottom Side ◽

Novel Method ◽

Total Fraction

A novel method was developed for the determination of linting propensity of paper based on printing with an IGT printability tester and image analysis of the printed strips. On average, the total fraction of the surface removed as lint during printing is 0.01%-0.1%. This value is lower than those reported in most laboratory printing tests, and more representative of commercial offset printing applications. Newsprint paper produced on a roll/blade former machine was evaluated for linting propensity using the novel method and also printed on a commercial coldset offset press. Laboratory and commercial printing results matched well, showing that linting was higher for the bottom side of paper than for the top side, and that linting could be reduced on both sides by application of a dry-strength additive. In a second case study, varying wet-end conditions were used on a hybrid former machine to produce four paper reels, with the goal of matching the low linting propensity of the paper produced on a machine with gap former configuration. We found that the retention program, by improving fiber fines retention, substantially reduced the linting propensity of the paper produced on the hybrid former machine. The papers were also printed on a commercial coldset offset press. An excellent correlation was found between the total lint area removed from the bottom side of the paper samples during laboratory printing and lint collected on halftone areas of the first upper printing unit after 45000 copies. Finally, the method was applied to determine the linting propensity of highly filled supercalendered paper produced on a hybrid former machine. In this case, the linting propensity of the bottom side of paper correlated with its ash content.

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Oriented Luminescent Nanostructures From Single Molecules Of Conjugated Polymers

MRS Proceedings ◽

10.1557/proc-771-l9.8 ◽

2003 ◽

Vol 771 ◽

Author(s):

Adosh Mehta ◽

Pradeep Kumar ◽

Jie Zheng ◽

Robert M. Dickson ◽

Bobby Sumpter ◽

...

Keyword(s):

Conjugated Polymers ◽

Polarization Anisotropy ◽

Emission Pattern ◽

Spectral Signatures ◽

Dipole Emission ◽

Ink Jet ◽

Molecular Scale ◽

Jet Printing ◽

Photochemical Stability ◽

Printing Techniques

AbstractDipole emission pattern imaging experiments on single chains of common conjugated polymers (solubilized poly phenylene vinylenes) isolated by ink-jet printing techniques have revealed surprising uniformity in transition moment orientation perpendicular to the support substrate. In addition to uniform orientation, these species show a number of striking differences in photochemical stability, polarization anisotropy,[1] and spectral signatures[2] with respect to similar (well-studied) molecules dispersed in dilute thin-films. Combined with molecular mechanics simulation, these results point to a structural picture of a folded macromolecule as a highly ordered cylindrical nanostructure whose long-axis (approximately collinear with the conjugation axis) is oriented, by an electrostatic interaction, perpendicular to the coverglass substrate. These results suggest a number of important applications in nanoscale photonics and molecular-scale optoelectronics.

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The Effect of Surface Structure and Performance of Cotton Fabric on the Resolution of Ink-Jet Printing

NIP & Digital Fabrication Conference ◽

10.2352/issn.2169-4451.2018.34.65 ◽

2018 ◽

Vol 2018 (1) ◽

pp. 65-68

Author(s):

Zhen Shi ◽

Rui Dan ◽

Longyun Hao ◽

Weichao Chen ◽

Ruyi Xie ◽

...

Keyword(s):

Surface Structure ◽

Cotton Fabric ◽

Ink Jet Printing ◽

Ink Jet ◽

Jet Printing ◽

And Performance ◽

Effect Of Surface

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REMAXINT: a two-mode clustering-based method for statistical inference on two-way interaction

Advances in Data Analysis and Classification ◽

10.1007/s11634-021-00441-y ◽

2021 ◽

Author(s):

Zaheer Ahmed ◽

Alberto Cassese ◽

Gerard van Breukelen ◽

Jan Schepers

Keyword(s):

Null Hypothesis ◽

Type I Error ◽

Type I ◽

The Novel ◽

Simulation Studies ◽

Test Statistic ◽

Clustering Model ◽

Novel Method ◽

Main Effects ◽

Empirical Case Studies

AbstractWe present a novel method, REMAXINT, that captures the gist of two-way interaction in row by column (i.e., two-mode) data, with one observation per cell. REMAXINT is a probabilistic two-mode clustering model that yields two-mode partitions with maximal interaction between row and column clusters. For estimation of the parameters of REMAXINT, we maximize a conditional classification likelihood in which the random row (or column) main effects are conditioned out. For testing the null hypothesis of no interaction between row and column clusters, we propose a $$max-F$$ m a x - F test statistic and discuss its properties. We develop a Monte Carlo approach to obtain its sampling distribution under the null hypothesis. We evaluate the performance of the method through simulation studies. Specifically, for selected values of data size and (true) numbers of clusters, we obtain critical values of the $$max-F$$ m a x - F statistic, determine empirical Type I error rate of the proposed inferential procedure and study its power to reject the null hypothesis. Next, we show that the novel method is useful in a variety of applications by presenting two empirical case studies and end with some concluding remarks.

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A Mathematical Model of Contact Tracing during the 2014–2016 West African Ebola Outbreak

Mathematics ◽

10.3390/math9060608 ◽

2021 ◽

Vol 9 (6) ◽

pp. 608

Author(s):

Danielle Burton ◽

Suzanne Lenhart ◽

Christina J. Edholm ◽

Benjamin Levy ◽

Michael L. Washington ◽

...

Keyword(s):

Mathematical Model ◽

Disease Management ◽

Ebola Virus ◽

Virus Disease ◽

Infected Individual ◽

Vital Role ◽

West African ◽

Contact Tracing ◽

The Novel ◽

Using Data

The 2014–2016 West African outbreak of Ebola Virus Disease (EVD) was the largest and most deadly to date. Contact tracing, following up those who may have been infected through contact with an infected individual to prevent secondary spread, plays a vital role in controlling such outbreaks. Our aim in this work was to mechanistically represent the contact tracing process to illustrate potential areas of improvement in managing contact tracing efforts. We also explored the role contact tracing played in eventually ending the outbreak. We present a system of ordinary differential equations to model contact tracing in Sierra Leonne during the outbreak. Using data on cumulative cases and deaths, we estimate most of the parameters in our model. We include the novel features of counting the total number of people being traced and tying this directly to the number of tracers doing this work. Our work highlights the importance of incorporating changing behavior into one’s model as needed when indicated by the data and reported trends. Our results show that a larger contact tracing program would have reduced the death toll of the outbreak. Counting the total number of people being traced and including changes in behavior in our model led to better understanding of disease management.

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