A Compact and High-Performance Hardware Architecture for CRYSTALS-Dilithium

The lattice-based CRYSTALS-Dilithium scheme is one of the three thirdround digital signature finalists in the National Institute of Standards and Technology Post-Quantum Cryptography Standardization Process. Due to the complex calculations and highly individualized functions in Dilithium, its hardware implementations face the problems of large area requirements and low efficiency. This paper proposes several optimization methods to achieve a compact and high-performance hardware architecture for round 3 Dilithium. Specifically, a segmented pipelined processing method is proposed to reduce both the storage requirements and the processing time. Moreover, several optimized modules are designed to improve the efficiency of the proposed architecture, including a pipelined number theoretic transform module, a SampleInBall module, a Decompose module, and three modular reduction modules. Compared with state-of-the-art designs for Dilithium on similar platforms, our implementation requires 1.4×/1.4×/3.0×/4.5× fewer LUTs/FFs/BRAMs/DSPs, respectively, and 4.4×/1.7×/1.4× less time for key generation, signature generation, and signature verification, respectively, for NIST security level 5.

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Nozzle Guide Vane Cooling System Optimization

Volume 8: Turbomachinery, Parts A, B, and C ◽

10.1115/gt2012-69600 ◽

2012 ◽

Author(s):

Julian Girardeau ◽

Frederic Pardo ◽

Jérôme Pailhès ◽

Jean-Pierre Nadeau

Keyword(s):

High Performance ◽

Cooling System ◽

Guide Vane ◽

Optimization Methods ◽

System Optimization ◽

Aggregation Functions ◽

Nozzle Guide Vane ◽

Low Efficiency ◽

Engine Maintenance ◽

Nozzle Guide

The authors would like to address improvements on cooling system optimization within a turboshaft Nozzle Guide Vane (NGV). Designing high performance cooling systems able to preserve the life duration of the NGV can lead to significant aerodynamic losses. Theses losses jeopardize the performance of the whole engine. In the same time, a low efficiency cooling system may affect engine Maintenance Repair and Overhaul (MRO) costs as component life decreases. To help turbine designers, the authors studied a vane and searched for an optimal cooling design by means of an evolutionary algorithm. The associated objective function is based on satisfaction indexes, using Harrington’s desirability curves and Antonsson’s aggregation functions. Evaluation and optimization methods will be presented as well as optimized designs.

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Tetraphenylbenzene-based AIEgens: the Horizontally Oriented Emitters for highly Efficient Non-doped Deep Blue OLEDs and Host for High-Performance Hybrid WOLEDs

10.26434/chemrxiv.11887026 ◽

2020 ◽

Author(s):

Pengbo Han ◽

Zeng Xu ◽

Chengwei Lin ◽

Dongge Ma ◽

Anjun Qin ◽

...

Keyword(s):

High Performance ◽

General Strategy ◽

Flat Panel Displays ◽

Light Emitting ◽

Horizontal Orientation ◽

Deep Blue ◽

Full Color ◽

High Emission ◽

White Oleds ◽

Low Efficiency

Deep blue organic-emitting fluorophores are crucial for application in white lighting and full color flat-panel displays but emitters with high color quality and efficiency are rare. Herein, novel deep blue AIE luminogens (AIEgens) with various donor units and an acceptor of cyano substituted tetraphenylbenzene (TPB) cores were developed and used to fabricate non-doped deep blue and hybrid white organic light-emitting diodes (OLEDs). Benefiting from its high emission efficiency and high proportion of horizontally oriented dipoles in the film state, the non-doped deep blue device based on CN-TPB-TPA realized a maximum external quantum efficiency 7.27%, with a low efficiency roll-off and CIE coordinates of (0.15, 0.08). Moreover, efficient two-color hybrid warm white OLEDs (CIEx,y = 0.43, 0.45) were achieved using CN-TPB-TPA as the blue-emitting layer and phosphor doped host, which realized maximum current, power, external quantum efficiencies 58.0 cd A-1, 60.7 lm W-1 and 19.1%, respectively. This work provides a general strategy to achieve high performance, stable deep blue and hybrid white OLEDs by construction of AIEgens with excellent horizontal orientation

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High Performance Printed Electronics on Large Area Flexible Substrates

2020 4th IEEE Electron Devices Technology & Manufacturing Conference (EDTM) ◽

10.1109/edtm47692.2020.9118012 ◽

2020 ◽

Author(s):

Mahesh Soni ◽

Dhayalan Shakthivel ◽

Adamos Christou ◽

Ayoub Zumeit ◽

Nivasan Yogeswaran ◽

...

Keyword(s):

High Performance ◽

Printed Electronics ◽

Flexible Substrates ◽

Large Area

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Large-area (64 × 64 array) inkjet-printed high-performance metal oxide bilayer heterojunction thin film transistors and n-metal-oxide-semiconductor (NMOS) inverters

Journal of Material Science and Technology ◽

10.1016/j.jmst.2021.01.003 ◽

2021 ◽

Author(s):

Shuangshuang Shao ◽

Kun Liang ◽

Xinxing Li ◽

Jinfeng Zhang ◽

Chuan Liu ◽

...

Keyword(s):

Thin Film ◽

Metal Oxide ◽

Thin Film Transistors ◽

High Performance ◽

Metal Oxide Semiconductor ◽

Oxide Semiconductor ◽

Large Area

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Design of a Sensitive Balloon Sensor for Safe Human–Robot Interaction

Sensors ◽

10.3390/s21062163 ◽

2021 ◽

Vol 21 (6) ◽

pp. 2163

Author(s):

Dongjin Kim ◽

Seungyong Han ◽

Taewi Kim ◽

Changhwan Kim ◽

Doohoe Lee ◽

...

Keyword(s):

High Performance ◽

Strain Sensor ◽

High Sensitivity ◽

Human Robot Interaction ◽

Large Area ◽

Tactile Sensors ◽

Robot Interaction ◽

Mechanical Crack ◽

Flexible Strain Sensor ◽

Contact Sensing

As the safety of a human body is the main priority while interacting with robots, the field of tactile sensors has expanded for acquiring tactile information and ensuring safe human–robot interaction (HRI). Existing lightweight and thin tactile sensors exhibit high performance in detecting their surroundings. However, unexpected collisions caused by malfunctions or sudden external collisions can still cause injuries to rigid robots with thin tactile sensors. In this study, we present a sensitive balloon sensor for contact sensing and alleviating physical collisions over a large area of rigid robots. The balloon sensor is a pressure sensor composed of an inflatable body of low-density polyethylene (LDPE), and a highly sensitive and flexible strain sensor laminated onto it. The mechanical crack-based strain sensor with high sensitivity enables the detection of extremely small changes in the strain of the balloon. Adjusting the geometric parameters of the balloon allows for a large and easily customizable sensing area. The weight of the balloon sensor was approximately 2 g. The sensor is employed with a servo motor and detects a finger or a sheet of rolled paper gently touching it, without being damaged.

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Nanonet: Low-temperature-processed tellurium nanowire network for scalable p-type field-effect transistors and a highly sensitive phototransistor array

NPG Asia Materials ◽

10.1038/s41427-021-00314-y ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Muhammad Naqi ◽

Kyung Hwan Choi ◽

Hocheon Yoo ◽

Sudong Chae ◽

Bum Jun Kim ◽

...

Keyword(s):

Low Temperature ◽

Field Effect ◽

High Performance ◽

Field Effect Transistors ◽

Optical Measurements ◽

Electrical Performance ◽

Large Area ◽

Nanowire Network ◽

P Type ◽

Nanowire Networks

AbstractLow-temperature-processed semiconductors are an emerging need for next-generation scalable electronics, and these semiconductors need to feature large-area fabrication, solution processability, high electrical performance, and wide spectral optical absorption properties. Although various strategies of low-temperature-processed n-type semiconductors have been achieved, the development of high-performance p-type semiconductors at low temperature is still limited. Here, we report a unique low-temperature-processed method to synthesize tellurium nanowire networks (Te-nanonets) over a scalable area for the fabrication of high-performance large-area p-type field-effect transistors (FETs) with uniform and stable electrical and optical properties. Maximum mobility of 4.7 cm2/Vs, an on/off current ratio of 1 × 104, and a maximum transconductance of 2.18 µS are achieved. To further demonstrate the applicability of the proposed semiconductor, the electrical performance of a Te-nanonet-based transistor array of 42 devices is also measured, revealing stable and uniform results. Finally, to broaden the applicability of p-type Te-nanonet-based FETs, optical measurements are demonstrated over a wide spectral range, revealing an exceptionally uniform optical performance.

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Administration of the D-A structure and steric hindrance effect to construct efficient red emitters for high-performance OLEDs with low efficiency roll-off

Dyes and Pigments ◽

10.1016/j.dyepig.2021.109398 ◽

2021 ◽

Vol 192 ◽

pp. 109398

Author(s):

Guan-Yu Ding ◽

Chun-Xiu Zang ◽

Han Zhang ◽

Zhong-Min Su ◽

Guang-Fu Li ◽

...

Keyword(s):

Steric Hindrance ◽

High Performance ◽

Low Efficiency

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Influence of Selected Model Parameters on the Electromagnetic Levitation Melting Efficiency

Applied Sciences ◽

10.3390/app11093827 ◽

2021 ◽

Vol 11 (9) ◽

pp. 3827

Author(s):

Blazej Nycz ◽

Lukasz Malinski ◽

Roman Przylucki

Keyword(s):

Electromagnetic Levitation ◽

Optimization Methods ◽

Calculation Model ◽

Model Parameters ◽

Starting Point ◽

Low Efficiency ◽

The Relationship ◽

Reactive Metals ◽

Electromagnetic Levitation Melting ◽

Metal Melting

The article presents the results of multivariate calculations for the levitation metal melting system. The research had two main goals. The first goal of the multivariate calculations was to find the relationship between the basic electrical and geometric parameters of the selected calculation model and the maximum electromagnetic buoyancy force and the maximum power dissipated in the charge. The second goal was to find quasi-optimal conditions for levitation. The choice of the model with the highest melting efficiency is very important because electromagnetic levitation is essentially a low-efficiency process. Despite the low efficiency of this method, it is worth dealing with it because is one of the few methods that allow melting and obtaining alloys of refractory reactive metals. The research was limited to the analysis of the electromagnetic field modeled three-dimensionally. From among of 245 variants considered in the article, the most promising one was selected characterized by the highest efficiency. This variant will be a starting point for further work with the use of optimization methods.

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