About structural elements of polymer insulators of the contact network

The high load on electrified lines makes tougher the requirements for the reliability and maintainability of power supply devices. Insulators are a critical element of the overhead contact network, and great attention is paid to improving their characteristics — electrical and mechanical strength. Advantages of polymer insulators in comparison with traditional ones made of porcelain and glass are generally recognized: manufacturability, low weight, compactness, ease of installation and transportation, high mechanical strength and shock resistance.The article presents the results of comprehensive studies of the electrophysical characteristics of fiberglass rods and bars made of AG-4S carried out by the University of Railway Engineers (MIIT), which were used in the developed polymer structures of the contact network. Recommendations are given on the maintenance of fiberglass rods and bars from AG-4S and their engineering support. The issues of the mechanical strength of polymer insulators of the overhead contact network are covered quite fully, therefore, this article offers the basic principles for calculating their electrical strength. The main requirements for modern polymer insulators and design features are briefly presented for each type: suspended, tension, cantilever, fixing and supporting.

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ISSUES OF DESIGN OF INFORMAL LEARNING SPACES IN THE UNIVERSITY CULTURAL CENTERS

Architectural Studies ◽

10.23939/as2020.02.188 ◽

2020 ◽

Vol 2020 (2) ◽

pp. 188-193

Author(s):

Dmytrash O ◽

Keyword(s):

Informal Learning ◽

General Characteristic ◽

Learning Space ◽

Basic Principles ◽

Educational Design ◽

Cultural Centers ◽

Educational Spaces ◽

Flexible Planning ◽

State Of Research ◽

The University

The article presents an overview and analysis of the state of research in the field of design and exploitation of modern educational spaces in universities around the world, namely areas with flexible planning, called informal learning space. According to the research conducted, the general characteristic and classification were developed and the basic principles of designing this space were revealed. The study identified several problems that arise during its exploitation, which should be taken into account in the designing process. There is described the experience of educational design of interuniversity cultural centres with the application of the developed theoretical bases of designing of informal educational space.

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On the Publishing Infrastructure of the University and its Construction Principles

Bibliotekovedenie [Library and Information Science (Russia)] ◽

10.25281/0869-608x-2010-0-1-121-126 ◽

2010 ◽

pp. 121-126

Author(s):

Tatyana F. Berestova ◽

Vera R. Abramovskih

Keyword(s):

Research Library ◽

Basic Principles ◽

History Of ◽

Publishing Infrastructure ◽

Distribution Sector ◽

The University

The basic principles of publishing activities in universities and their interrelation, all stages of redaction, the problems each of them, and ways to solve them. The activities of the distribution sector of publishing in the structure of the Research Library of Chelyabinsk State Academy of Culture and Arts and the history of its creation are described.

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DMV 59

Alloy Digest ◽

10.31399/asm.ad.ni0672 ◽

2009 ◽

Vol 58 (8) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

Mechanical Strength ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

High Mechanical Strength ◽

Temperature Performance

Abstract DMV 59 is the material of choice for a wide variety of applications where significant corrosion resistance and high mechanical strength is necessary. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-672. Producer or source: Mannesmann DMV Stainless USA Inc.

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BOFORS 2RM2

Alloy Digest ◽

10.31399/asm.ad.ss0169 ◽

1965 ◽

Vol 14 (5) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Low Temperature ◽

Mechanical Strength ◽

Physical Properties ◽

Tensile Properties ◽

Cast Steel ◽

Heat Treating ◽

High Mechanical Strength ◽

Temperature Performance

Abstract BOFORS 2RM2 is a hardenable stainless cast steel having good weldability, high mechanical strength and improved corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: SS-169. Producer or source: Aktiebolaget Bofors.

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The promise of nanomedicine research with Sourav Bhattacharjee

Video Journal of Biomedicine ◽

10.2217/vjbm-2020-0005 ◽

2020 ◽

Author(s):

Sourav Bhattacharjee

Keyword(s):

Basic Principles ◽

University College ◽

The University

In this Expert Perspective video, Sourav Bhattacharjee of the University College Dublin discusses the hopes and challenges in the field of nanomedicine research, overviewing the basic principles of nanomedicine and the progress made so far. Sourav also summarises his work in nanomedicine, providing guidance and advice to new researchers in this field.

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Dynamic Nanohybrid-Polysaccharide Hydrogels for Soft Wearable Strain Sensing

Sensors ◽

10.3390/s21113574 ◽

2021 ◽

Vol 21 (11) ◽

pp. 3574

Author(s):

Pejman Heidarian ◽

Hossein Yousefi ◽

Akif Kaynak ◽

Mariana Paulino ◽

Saleh Gharaie ◽

...

Keyword(s):

Mechanical Strength ◽

Strain Sensors ◽

Self Healing ◽

Nano Materials ◽

Strain Sensing ◽

Ferric Ions ◽

Research Activity ◽

Adhesion Properties ◽

High Mechanical Strength ◽

The Moment

Electroconductive hydrogels with stimuli-free self-healing and self-recovery (SELF) properties and high mechanical strength for wearable strain sensors is an area of intensive research activity at the moment. Most electroconductive hydrogels, however, consist of static bonds for mechanical strength and dynamic bonds for SELF performance, presenting a challenge to improve both properties into one single hydrogel. An alternative strategy to successfully incorporate both properties into one system is via the use of stiff or rigid, yet dynamic nano-materials. In this work, a nano-hybrid modifier derived from nano-chitin coated with ferric ions and tannic acid (TA/Fe@ChNFs) is blended into a starch/polyvinyl alcohol/polyacrylic acid (St/PVA/PAA) hydrogel. It is hypothesized that the TA/Fe@ChNFs nanohybrid imparts both mechanical strength and stimuli-free SELF properties to the hydrogel via dynamic catecholato-metal coordination bonds. Additionally, the catechol groups of TA provide mussel-inspired adhesion properties to the hydrogel. Due to its electroconductivity, toughness, stimuli-free SELF properties, and self-adhesiveness, a prototype soft wearable strain sensor is created using this hydrogel and subsequently tested.

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Skin-inspired Nanofibrillated Cellulose-reinforced Hydrogels with High Mechanical Strength, Long-term Antibacterial, and Self‐recovery Ability for Wearable Strain/Pressure Sensors

Carbohydrate Polymers ◽

10.1016/j.carbpol.2021.117894 ◽

2021 ◽

pp. 117894

Author(s):

Shuang Wang ◽

Jun Xiang ◽

Yuegang Sun ◽

Haoliang Wang ◽

Xiaosheng Du ◽

...

Keyword(s):

Mechanical Strength ◽

Pressure Sensors ◽

Nanofibrillated Cellulose ◽

High Mechanical Strength

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High-strength and fibrous capsule–resistant zwitterionic elastomers

Science Advances ◽

10.1126/sciadv.abc5442 ◽

2021 ◽

Vol 7 (1) ◽

pp. eabc5442

Author(s):

Dianyu Dong ◽

Caroline Tsao ◽

Hsiang-Chieh Hung ◽

Fanglian Yao ◽

Chenjue Tang ◽

...

Keyword(s):

Mechanical Properties ◽

Mechanical Strength ◽

High Strength ◽

Design Principles ◽

Fibrous Capsule ◽

High Mechanical Strength ◽

Capsule Formation ◽

Locking Mechanism ◽

Fibrous Capsule Formation

The high mechanical strength and long-term resistance to the fibrous capsule formation are two major challenges for implantable materials. Unfortunately, these two distinct properties do not come together and instead compromise each other. Here, we report a unique class of materials by integrating two weak zwitterionic hydrogels into an elastomer-like high-strength pure zwitterionic hydrogel via a “swelling” and “locking” mechanism. These zwitterionic-elastomeric-networked (ZEN) hydrogels are further shown to efficaciously resist the fibrous capsule formation upon implantation in mice for up to 1 year. Such materials with both high mechanical properties and long-term fibrous capsule resistance have never been achieved before. This work not only demonstrates a class of durable and fibrous capsule–resistant materials but also provides design principles for zwitterionic elastomeric hydrogels.

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Nacre-inspired composite films with high mechanical strength constructed from MXenes and wood-inspired hydrothermal cellulose-based nanofibers for high performance flexible supercapacitors

Nanoscale ◽

10.1039/d0nr08090j ◽

2021 ◽

Vol 13 (5) ◽

pp. 3079-3091

Author(s):

Libo Chang ◽

Zhiyuan Peng ◽

Tong Zhang ◽

Chuying Yu ◽

Wenbin Zhong

Keyword(s):

Mechanical Strength ◽

High Performance ◽

Composite Films ◽

High Mechanical Strength ◽

Flexible Supercapacitor ◽

Flexible Supercapacitors

Wood-inspired HCNF@Lig introduced into MXenes constructing a nacre-like material with high mechanical strength and excellent flexibility used as a flexible supercapacitor.

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