scholarly journals Desiccation behaviour of colloidal silica grouted sand: A new material for the creation of near surface hydraulic barriers

2020 ◽  
Vol 270 ◽  
pp. 105579 ◽  
Author(s):  
Matteo Pedrotti ◽  
Christopher Wong ◽  
Gráinne El Mountassir ◽  
Joanna C. Renshaw ◽  
Rebecca J. Lunn
Keyword(s):  
Colloidal Silica ◽  
Near Surface ◽  
New Material ◽  
The Creation ◽  
Hydraulic Barriers

Materials technology: Innovations and progress

Impact ◽  
2020 ◽  
Vol 2020 (2) ◽  
pp. 52-53
Author(s):  
Lucy Sharp
Keyword(s):  
Material Properties ◽  
New Materials ◽  
Medical Problems ◽  
Technology Innovations ◽  
Societal Challenges ◽  
New Material ◽  
Innovative Materials ◽  
The Creation ◽  
Novel Applications

Materials technology is a constantly evolving discipline, with new materials leading to novel applications. For example, new material properties arise from combining different materials into composites. Researching materials can help solve societal challenges, with the creation of innovative materials resulting in breakthroughs in overcoming hurdles facing humankind, including energy challenges and medical problems. Innovative materials breathe new life into industries and spur on scientific and technological discovery.

On the efficiency of combined ion implantation for the creation of near-surface nitrogen-vacancy centers in diamond

2016 ◽  
Vol 213 (8) ◽  
pp. 2044-2050 ◽  
Author(s):  
Felipe Fávaro de Oliveira ◽  
Seyed Ali Momenzadeh ◽  
Denis Antonov ◽  
Helmut Fedder ◽  
Andrej Denisenko ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Nitrogen Vacancy ◽  
Near Surface ◽  
Nitrogen Vacancy Centers ◽  
The Creation

Optoelectronic Properties of Plasma CVD a-Si:H Modified by Filament-Generated Atomic H

1992 ◽  
Vol 258 ◽  
Author(s):  
Y.M. Li ◽  
I. An ◽  
M. Gunes ◽  
R.M. Dawson ◽  
R.W. Collins ◽  
...  
Keyword(s):  
Film Thickness ◽  
Real Time ◽  
Chemical Potential ◽  
Defect Density ◽  
Plasma Deposition ◽  
Plasma Cvd ◽  
Near Surface ◽  
Optical Gap ◽  
New Material ◽  
Control Samples

ABSTRACTWe have studied a-Si:H prepared by alternating plasma deposition with atomic H treatments performed with a heated W filament. Real time spectroscopie ellipsometry provides the evolution of film thickness, optical gap, and a measure of the fraction of Si-Si bonds broken in the near-surface (200 Å) during H-exposure of single films. This information guided us to the desired parameters for the H-treatments. Here, we concentrate on a weak hydrogenation regime characterized by minimal etching, a higher H content by 2 at.%, and a larger optical gap by 0.02 eV for the growth/hydrogenation structures in comparison to continuously deposited control samples. This new material has shown an improvement in the defect density in the light-soaked state in comparison to the control samples. This may result from stabilization of the Si structure due to an increase in the H chemical potential in the a-Si:H.

Representing and commoning the refugee crisis: The ‘assemblage’ of the Lesvos Migration Atlas

2019 ◽  
Vol 7 (1) ◽  
pp. 11-42
Author(s):  
Myrto Tsilimpounidi ◽  
Naya Tselepi ◽  
Orestis Pangalos ◽  
Chryssanthi ‘Christy’ Petropoulou
Keyword(s):  
Multiple Representations ◽  
Refugee Crisis ◽  
Photographic Material ◽  
New Material ◽  
The Commons ◽  
Collective Process ◽  
The Common ◽  
The Creation

This article uses a critical lens to examine the various representations of the so-called ‘refugee crisis’ in Lesvos, Greece through both the system of the hotspot regime and the performative acts of commoning, defined as the creation of the commons. It also proposes a process of commoning by the creation of an ‘assemblage’ of the Lesvos Migration Atlas. In this manner, the Atlas as an outcome of the research is itself a representation that embraces theory, narratives, practices, and acts; a visual and symbolic tool that provides space for photographic material, videos, artworks, (re)mappings, everyday stories, and reflective texts. At the same time, it is a collective process of capturing, writing and representing, open to new material and scripts – thus a product in a process of becoming. Overall, the online and interactive Lesvos Migration Atlas can well be approached as an ‘assemblage’ that respects the mobility and contingency of the various crises, representations and acts of commoning. In the Atlas, the refugee crisis, the hotspot regime and the common spaces that have been created are brought together through the emergence and critical confrontation of the multiple representations of Lesvos.

Elastomeric Conductive Ipn From Polyaniline And Fullerene-Based Networks

1995 ◽  
Vol 413 ◽  
Author(s):  
Lee Y. Wang ◽  
Long Y. Chiang ◽  
C. S. Kuo ◽  
J. G. Lin ◽  
C. Y. Huang
Keyword(s):  
Ammonium Persulfate ◽  
Cross Linking ◽  
Synthetic Method ◽  
Near Surface ◽  
Bulk Properties ◽  
Ambient Temperatures ◽  
Polyurethane Networks ◽  
New Material ◽  
Conductive Polyaniline ◽  
Polyhydroxylated Fullerenes

ABSTRACTPolyhydroxylated fullerenes were utilized as an efficient hyper cross-linking agent in the synthesis of polyurethane networks. The resultant elastomers exhibited greatly enhanced thermal stability in comparison with those of the corresponding linear polyurethane and analogous elastomers, which were cross-linked by 1,1,1- tris(hydroxymethyl)ethane. A synthetic method leading to the preparation of a thin layer of conductive polyaniline/polyurethane IPN at the near surface of a fullerenol- based elastomeric substrate was demonstrated, using aqueous ammonium persulfate as an oxidizing agent in the presence of HCI. This new material exhibits a conductivity of 2.0 S/cm at ambient temperatures with the retention of most bulk properties of the parent elastomer, such as elongation and tensile strength at break.

Colloidal Silica/Poly(Methacrylsiloxane) Nanocomposite Particles: Synthesis, Characterization, and Application in Toners.

2014 ◽  
Vol 1663 ◽  
Author(s):  
Dmitry Fomitchev ◽  
Russell Lewis ◽  
Hairuo Tu ◽  
Li Cheng ◽  
Hajime Kambara ◽  
...  
Keyword(s):  
Particle Size ◽  
Colloidal Silica ◽  
Silica Particles ◽  
Laser Printer ◽  
Mass Ratio ◽  
One Pot ◽  
New Class ◽  
New Material ◽  
Hydrophobic Treatment ◽  
Hydrophobic Material

ABSTRACTWe report on a new class of materials for laser printer toner applications. These materials were prepared from methacrysilane-in-water emulsions stabilized with colloidal silica particles. In this elegant system, the colloidal silica particles reside at the water/oil interface helping to emulsify the oil droplet, self-organizing into a raspberry-like morphology. The emulsion formation is followed by free-radical polymerization, hydrophobic treatment, and drying steps. This one pot synthesis in water affords a hydrophobic material with a particle size in the range of 80 to 300 nm. The particle size could be fine-tuned by changing the oil-to-silica mass ratio or by using colloidal silica particles of different sizes. Results of material characterization by solid-state NMR, electron microscopy, and particle size measurements methods will be presented. Examples of possible extensions of the synthesis towards materials with methacrylsilane partially substituted with other methacrylates will be provided. Application of the new material in toners will be described as will the comparison of its performance with the incumbent material - hydrophobic colloidal silica.

I: Ultra-Shallow Junction Cleaning: Metrology for Evaluating Dopant Loss and Substrate Erosion

2007 ◽  
Vol 134 ◽  
pp. 129-131 ◽  
Author(s):  
Mike S. Ameen ◽  
Aseem K. Srivastava ◽  
Ivan L. Berry
Keyword(s):  
Chemical Processes ◽  
Near Surface ◽  
Shallow Junction ◽  
Highly Sensitive ◽  
Shallow Junctions ◽  
Wet Chemical ◽  
The Creation ◽  
Ultra Shallow Junctions ◽  
Dopant Loss ◽  
Surface Proximity

We have investigated the use of Rs and SIMS measurements to quantify substrate erosion due to plasma ashing and subsequent wet cleaning in the creation of ultra-shallow junctions. The near-surface proximity of the implants makes them highly sensitive to various plasma and wet chemical processes. We also observed a dependency on the implant species, dose and energy that can be correlated to substrate damage incurred during implant.

scholarly journals Impulse exchange at the surface of the ocean and the fractal dimension of drifter trajectories

2002 ◽  
Vol 9 (1) ◽  
pp. 11-23 ◽  
Author(s):  
D. M. Summers
Keyword(s):  
Fractal Dimension ◽  
Turbulent Flow ◽  
Velocity Fluctuation ◽  
Present Model ◽  
Ocean Surface ◽  
Surface Flow ◽  
Near Surface ◽  
Fluctuation Field ◽  
The Creation

Abstract. An impulse-based model is developed to represent a coupling between turbulent flow in the atmosphere and turbulent flow in the ocean. In particular, it is argued that the atmosphere flowing horizontally over the ocean surface generates a velocity fluctuation field in the latter's near-surface flow. The mechanism for this can be understood kinematically in terms of an exchange of tangentially-oriented fluid impulse at the air-sea interface. We represent this exchange numerically through the creation of Lagrangian elements of impulse density. An indication of the efficacy of such a model would lie in its ability to predict the observed fractal dimension of lateral trajectories of submerged floats set adrift in the ocean. To this end, we examine the geometry of lateral tracer-paths determined from the present model.

Copyright Support Structures

2014 ◽  
pp. 81-93
Keyword(s):  
Copyright Law ◽  
Government Support ◽  
Support Structures ◽  
Australian Government ◽  
New Material ◽  
The Creation

This chapter deals with government and other support structures available to authors internationally and nationally in relation to the enforcement of their copyright and funding. It provides an overview of how the Australian government support structures interact with equivalent global structures and how these mechanisms are utilised to supplement authors’ incomes. These structures rely on the premise that copyright law creates incentives for people to invest their time, talent, and other resources in the creation of new material that benefits society and include government support structures such as grants as well as licensing schemes such as the Copyright Agency Limited (CAL), Public Lending Rights (PLR), and Educational Lending Rights (ELR).

Solving the Conflict Between Breathability and Masked Faces within Facial Recognition Technologies

2021 ◽  
Vol 48 (3) ◽  
pp. 58-70
Author(s):  
Aaron Tucker
Keyword(s):  
Law Enforcement ◽  
Facial Recognition ◽  
Internal Conflict ◽  
The Novel ◽  
Systemic Racism ◽  
New Material ◽  
The Creation

The interlocking crises of the COVID-19 pandemic, wildfires exacerbated by climate catastrophe, and systemic racism in law enforcement have led to the biopolitical management of breathable air alongside the exponential rise in the production of masked faces. However, the introduction of masked faces momentarily short-circuited the abilities of facial recognition technologies (FRTs) to identify and verify the novel combination of media, which includes the elemental media of air and breath, that constructs masked faces. FRTs’ initial failures related to masked faces speaks to the internal conflict within contemporary biopolitical control that arises during moments of crisis, wherein previous protocols and practices clash with new material and media. In response to the competing vectors brought about by the crisis of breathability, the National Institute of Standards and Technology’s July 2020 report details FRTs’ failures as they relate to masked faces, while providing protocols for future solutions. This paper critiques the solution provided within the report in which the creation and deployment of synthetic facial data relies on the liminal populations of refugees and immigrants for experimental materials, a practice that ultimately targets the very populations being used to improve the technology.

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