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Biobased Heat-Triggered Shape-Memory Polymers Based on Polylactide/Epoxidized Natural Rubber Blend System Fabricated via Peroxide-Induced Dynamic Vulcanization: Co-continuous Phase Structure, Shape Memory Behavior, and Interfacial Compatibilization

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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 2015年第35期54卷 8723-8731页

作者： Chen, Yukun Chen, Kunling Wang, Youhong Xu, Chuanhui S China Univ Technol Key Lab Polymer Proc Engn Minist Educ Guangzhou 510640 Guangdong Peoples R China Guangxi Univ Sch Chem & Chem Engn Nanning 530004 Peoples R China

A biobased heat-triggered shape-memory polymer (HSMP) consisting of polylactide (PLA) and epoxidized natural rubber (ENR) was fabricated by peroxide-induced dynamic vulcanization. The cross-linked ENR phase exhibits a continuous net-like structure embedded in the PLA phase, which is different from a conventional plastic/rubber system having the typical "sea-island" morphology in which vulcanized rubber particles were dispersed in plastic matrix. In situ interfacial compatibilization was confirmed by FTIR analysis. The shape-recovery ratios of the PLA/ENR HSMPs were significantly improved over 90%, compared to that (60-70%) of PLA. The shape fixing and memorizing capability of PLA/ENR HSMPs was realized by the glass transition of the PLA phase: cross-linked ENR continuous phase at rubbery state offered strong recovery driving force, improved interface provided effective stress-transferring during shape recovery, and PLA continuous phase served as a "control-switch" for recovery. The biobased PLA/ENR HSMP could serve as a promising alternative to the traditional materials for intelligent biomedical devices.

关键词： programmable logic arrays COMPATIBILISATION traditional materials Sulfidation Glass transition PHASE STRUCTURE rubbers Phase RECYCLING RATE Natural rubber BLENDING SYSTEM

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Multi-function logic synthesis of silicon and beyond-silicon ultra-low power pass-gates circuits

Multi-function logic synthesis of silicon and beyond-silicon...

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IFIP International Conference on Very Large Scale Integration (VLSI-SoC)

作者： Valerio Tenace Andrea Calimera Enrico Macii Massimo Poncino Dipartimento di Automatica e Informatica Torino Italy

ISBN: (纸本)9781509035625

Pass-gates logic is known to be intrinsically more energy efficient than static CMOS. This feature attracted the research interest over the years and many working implementations have been demonstrated. Recent works, in particular, have shown that pass-gates logic is well suited for ultra-low power adiabatic circuits mapped on emerging technologies. Despite the progress made, several design issues still prevent pass-gates logic circuits reaching large scale integration. In this work we deal with the lack of synthesis tools and methodologies. We propose a multi-function decomposition engine that yields (i) an efficient abstract circuit modeling through a more compact data-structure, the Multi-Function Pass Diagram (MFPD) and (ii) an effective multi-gate area/delay-driven low-power synthesis&optimization flow. Simulation results conducted on different technologies, i.e., silicon and graphene, demonstrate that logic circuits synthesized with the proposed tool are smaller in size and depth, hence less power consuming and faster than circuits obtained through conventional synthesis flows based on Binary Decision Diagrams.

关键词： logic gates Optimization Silicon Integrated circuit modeling programmable logic arrays Very large scale integration

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A new class of finite time nonlinear consensus protocol with short convergence time for networks of dynamic agent

A new class of finite time nonlinear consensus protocol with...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Xiaobo Wang Juelong Li Jianchun Xing Ronghao Wang Donghao Fu College of Defense Engineering PLA University of Science and Technology Nanjing China College of Defense Engineering PLA University of Science and Technology Beijing Nanjing China Nanjing Artillery Academy Nanjing China

ISBN: (纸本)9781467384155

In this paper, finite time state consensus problem for networks of dynamic agent is discussed, a new protocol guaranteeing the state of multi-agent reaching an consensus in finite time is proposed. The protocol contains both a nonlinear term and a linear term, the nonlinear term can guarantee that the consensus can be realized in finite time, and the linear term can reduce the convergence time. The upper bound of convergence time is obtained, the relationship among the convergence time with the communication topology and the initial state is analyzed. Finally, several simulations are presented to show the effectiveness of the results.

关键词： Protocols Convergence Topology Electronic mail programmable logic arrays Multi-agent systems Eigenvalues and eigenfunctions

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logic Synthesis in Reversible PLA

Logic Synthesis in Reversible PLA

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International Conference on VLSI Design

作者： Nazma Tara Hafiz Md. Hasan Babu Nawshi Matin Dept. of Computer Science and Engineering University of Dhaka Dhaka Bangladesh Dhaka University Dhaka Dhaka District BD

Reversible logic have been motivated by consideration of zero-energy computation. Re-configurability and structural regularity of programmable logic Devices caused wide use of it by the logic designers. In this paper, we propose a design algorithm for a PLA (programmable logic Array) with a newly designed low cost 3 × 3 reversible NMG (New Mux Gate) circuit for implementing multi-output ESOP (Exclusive-OR Sum of Product) functions. In addition, we propose a heuristic to sort and to realize the product terms of ESOP functions in order to share the internal sub-products to reduce the number of gates in the proposed circuit. The proposed algorithms make the design efficient with improvement 9.05% in number of gates, 25.5% in garbage count and 14.5% quantum cost metric than existing techniques averagely. Performance is also analyzed by using MCNC benchmark circuits.

关键词： logic gates programmable logic arrays Algorithm design and analysis Benchmark testing Input variables US Department of Transportation Energy dissipation

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Cassia fistula L. florisynthesis and characterisation of silver nanoparticles - a paradigm as antimicrobial functionalized PLA matrix

Cassia fistula L. florisynthesis and characterisation of sil...

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IEEE Conference on Nanotechnology

作者： K. Priadharsini A. Samina Sulthana C. Gandhi Shree P. Palani Centre for Advanced Studies in Botany University of Madras Chennai Tamil Nadu India

Cassia fistula L. hoarding multi perspective components that are still being used not only as medicines but also in synthesizing silver nanoparticles that are reliably beneficial for its microbial growth inhibition nature. The microbial resistant products seems to have gained much importance in many of the emerging fields. Active biocomposite fabricated relating biodegradable Polylactide (PLA) and synthesized silver nanoparticles using petal extract of C fistula L. as reducing and capping agent by solvent casting method can be used as food/fruit wrapping material. Thus, the reduction of silver nitrate (ions) to silver nanoparticles using C fistula L. petal extract was monitored primarily by visual colour change, later by confirming with SPR bands between 400-500 nm in the solution. HRTEM-SAED pattern, FESEM-EDAX were characterised to observe the size and shape nature of the synthesised silver nanoparticles. Stability and net charge were known using DLS and zeta potential. The major scenario to imply this synthesised silver nanoparticles as a socially harmless substances incorporated in the fabrications of PLA matrices with antimicrobial nature. Matrices were characterised to know the nature by XRD, SEM and mechanical properties by tensile, elongation studies to sustain the fruit safety and commercial materials. Antimicrobial tasks of the synthesized silver nanoparticles and fabricated PLA matrix incorporated with the synthesised silver nanoparticles were estimated by disc diffusion against some pathogenic bacteria and poison plate method against some fungal aerosols. The degrading nature of the fabricated PLA matrices was performed by pot degradation method. Synthesised silver nanoparticles studies strongly states that the reduced particles are of 28 nm sized, semi spherical shaped antimicrobially active nanocrystals when tested against some airborne fungal contaminants and bacterial pathogens. Later, the results revealed a significant positive records with acceptab

关键词： programmable logic arrays Silver Nanoparticles Microorganisms X-ray scattering Antibacterial activity Aerosols

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Increasing the resistance of computer systems towards virus attacks

Increasing the resistance of computer systems towards virus ...

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IEEE International Conference on Electronics and Nanotechnology (ELNANO)

作者： Myroslav Komar Anatoly Sachenko Volodymyr Kochan Taras Skumin Ternopil National Economic University Research Institute for Intelligent Computer Systems Ternopil Ukraine

ISBN: (纸本)9781509014323

A concept of the computer system with resistance towards virus attacks on the basis of hardware was proposed. The structure of antivirus protection system was designed. Neural immune detectors for the identification and classification of virus attacks are implemented on programmable logic arrays. Mamdani fuzzy inference rules were proposed to use in order to make decisions on providing counteraction methods against virus attacks.

关键词： Detectors Immune system Computer viruses Neural networks Hardware programmable logic arrays

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RTD-based reconfigurable logic gates for programmable logic array applications

RTD-based reconfigurable logic gates for programmable logic ...

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Indium Phosphide and Related Materials Conference

作者： Donghyeok Bae Jaehong Park Maengkyu Kim Yongsik Jeong Kyounghoon Yang School of Electrical Engineering Korea Advanced Institute of Science and Technology Republic of Korea

ISBN: (纸本)9781509019656

Summary form only given. Resonant-tunneling-diode (RTD) based reconfigurable logic gates have been designed and fabricated for RTD-based programmable logic array (PLA) applications. As PLA building blocks, two reconfigurable logic gates with three input terminals are proposed. The implemented gates show the reconfigurable functions of AND, OR, Majority, NOT, XOR, XNOR and 3-input XOR exploiting threshold characteristics of the RTD monostable-bistable transition logic element (MOBILE). The operation of the fabricated gates is successfully confirmed up to the clock frequency of 5 GHz. As for the full-adder topology, the number of devices in the proposed gate-based full-adder is less than a half of that in the conventional CMOS full-adder topology.

关键词： logic gates programmable logic arrays Topology Compounds Electrical engineering Resonant tunneling devices Mobile communication

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Architecture-Centric Derivation of Products in a Software Product Line

Architecture-Centric Derivation of Products in a Software Pr...

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International Workshop on Modeling in Software Engineering (MISE)

作者： Cuong Cu Yongjie Zheng Department of Computer Science and Electrical Engineering University of Missouri - Kansas City Kansas City Missouri USA

ISBN: (纸本)9781509001316

It is essential to architecture-centric product line development that product line architecture can be used to drive activities specific to product line development, such as product derivation. This requires a mechanism that can automatically derive the architecture and code of a product instance from the customization of product line architecture. In this paper, we analyze the insufficiency of two existing solutions in this area and present an architecture-centric approach that meets the requirement. The approach can support product line differences in platforms and functions, and generate both product line code and product code. It is based on a product line implementation mechanism that combines a code generation and separation pattern with an architecture-based code annotation technique. We have implemented the approach, and finished a preliminary evaluation with a chat application.

关键词： Computer architecture programmable logic arrays Software product lines Urban areas Software systems Software architecture

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Dielectrophoresis-induced cell patterning using a new PLA scaffold made by 3D printing

Dielectrophoresis-induced cell patterning using a new PLA sc...

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IEEE Conference on Nanotechnology

作者： Zhijie Huan Henry K. Chu Jie Yang Dong Sun Department of Mechanical and Biomedical Engineering City University of Hong Kong Kowloon Hong Kong Department of Precision Machinery and Instrumentation University of Science and Technology of China Hefei Anhui China Department of Mechanical Engineering Hong Kong Polytechnic University Kowloon Hong Kong China

This paper presents a new technique of fabricating 3D-printed scaffolds that can utilizes dielectrophoresis (DEP) for cell patterning. The scaffold was first fabricated using a 3D printer with a biodegradable polymer, polylactic acid (PLA). The electrical conductivity of the polymeric scaffold was enhanced through sputtering a thin layer of gold. When a voltage was supplied to the scaffold, non-uniform electric fields were generated so that cells were polarized and patterned onto the scaffold. Experiments were conducted to demonstrate that the gold-coated PLA scaffold could be used for rapid patterning MC3T3-E1 cells via DEP. Cell proliferation was assessed by (3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide) MTT method and the result confirms the DEP cell patterning mechanism is not cytotoxic.

关键词： Dielectrophoresis programmable logic arrays Three-dimensional displays Conductivity Electric fields Immune system Sun

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Peer learning assistants in undergraduate computer science courses

Peer learning assistants in undergraduate computer science c...

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Frontiers in Education (FIE) Conference

作者： Inna Pivkina Department of Computer Science New Mexico State University Las Cruces NM USA

ISBN: (纸本)9781509017911

The paper describes the experience of using undergraduate students as peer learning assistants (PLAs) in different undergraduate computer science courses which have graduate teaching assistants (TAs) as well. Depending on the course, PLAs have some of the following roles - holding office hours, helping with the labs and tutorials, facilitating student group work in class. The impact of PLAs on student learning outcomes is assessed by comparing student grades in the offerings of the course with and without PLAs and comparing the numbers of student visits outside of the class meeting times to the instructor, to the TAs, and to the PLAs. In addition to that, questionnaires are used to solicit feedback from students and PLAs about their experience. We find that the use of PLAs results in statistically significant increase in student course grades and decrease in the number of non-passing grades. Student experiences with PLAs are very positive. Many students prefer to seek help from the PLAs rather than from the TAs or instructor. PLAs report that the experience was beneficial to them, too. The paper discusses benefits of using PLAs, student preferences regarding PLAs and TAs, and what practices worked best.

关键词： programmable logic arrays Springs Education Data structures Mathematics Programming

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