Light Weight Rigid OCS in Elevated Section of Delhi MRTS

2020 ◽  
Author(s):  
Om Hari Pande ◽  
Ashok Tewari ◽  
Sanjeev Kumar
Keyword(s):  
Mechanical Properties ◽  
Detailed Analysis ◽  
Short Circuit ◽  
Light Weight ◽  
Contact Wire ◽  
The Past ◽  
The World ◽  
National Capital ◽  
Electrical Faults ◽  
The City

Abstract Delhi Metro is the first Metro in the world to provide 25 kV AC Rigid Overhead Conductor System (ROCS) in underground Tunnel. Most of the metros worldwide runs on 1500 V DC. The Elevated section of Delhi Metro is also provided with 25 kV AC Flexible OHE systems. The system is designed in accordance with EN-50119, 50122. MRTS system plays an important role in functioning of the city transport. In the national capital of India, the Delhi Metro has become lifeline of Delhi since it’s inauguration in December 2002. Even occasional disruption of services, not only creates inconvenience & chaos between commuters but also invites severe criticism from public & media. A number of failures in flexible OHE have caused disruption of metro services in the past few years. In elevated & at grade sections, DMRC is using conventional 25 kV AC flexible OHE where contact wire is suspended from a stranded messenger wire. Detailed analysis of the failure incidents indicated that catenaries’ parting and strands breakages due to short circuit contribute a significant portion i.e. 49% of total flexible OHE failures, While ROCS in underground stations is giving almost trouble-free services. Exploration of the possibilities of adopting Rigid OCS in elevated section shall help in reducing the breakdowns in 25kV traction as this will eliminate the component (i.e. Messenger wire) which is responsible for major failure. Also, mechanical properties of ROCS during electrical faults are far superior to that of flexible OHE.

A Cohesive Analysis of Factors Affecting the Tourist Destination Image of Delhi

2015 ◽  
Vol 1 (2) ◽  
Author(s):  
Usha Arora ◽  
Deepti Dabas Hazarika
Keyword(s):  
National Income ◽  
Destination Image ◽  
Pertinent Literature ◽  
Tourist Destination ◽  
Factors Affecting ◽  
Tourism Marketing ◽  
The World ◽  
National Capital ◽  
Destination Management Organizations ◽  
The City

Economies all over the world are moving towards a focus on services. Tourism has emerged as a major contributor to economies all over the world. This is why specific focus is being placed on tourism, as Destination Management Organizations (DMOs) concentrate their efforts on tourism. India has been one of the countries where the share of tourism in national income has steadily been increasing. As the national capital, the city of Delhi has a major role to play in the tourist inflow to the country, as well as within the country. Successful tourism marketing requires that the concepts of tourist destination and underlying factors are comprehended in detail. An analysis of the available, pertinent literature on the area shows the manner in which numerous factors come together to form the image of a tourist destination. In fact, it needs to be understood that image formation may be done differently for different consumers. This further necessitates a detailed study of the factors influencing tourist destination image.

The Structure and Mechanical Properties of Aluminum Cellular Metal With Periodic Cubic Cells

2016 ◽  
Author(s):  
Xiaobing Dang ◽  
Ruxu Du ◽  
Kai He ◽  
Qiyang Zuo
Keyword(s):  
Mechanical Properties ◽  
Relative Density ◽  
Sheet Metal ◽  
Light Weight ◽  
Practical Applications ◽  
Sheet Metal Stamping ◽  
High Stiffness ◽  
The Past ◽  
Cellular Metal ◽  
Metal Stamping

As a light-weight material with high stiffness and strength, cellular metal has attracted a lot of attentions in the past two decades. In this paper, the structure and mechanical properties of aluminum cellular metal with periodic cubic cells are studied. The aluminum cellular metal is fabricated by sheet metal stamping and simple adhesion. Two sizes of specimens with cell sizes of 3mm and 5mm are fabricated. Their relative density and mechanical properties are tested by means of experiments. The results show that the cubic-cell cellular metal has high and predictable strength and hence, can be used for many practical applications.

scholarly journals Understanding Urban Growth in Beijing-Tianjin-Hebei Region over the Past 100 Years Using Old Maps and Landsat Data

2021 ◽  
Vol 13 (16) ◽  
pp. 3264 ◽  
Author(s):  
Shuang Li ◽  
Zhongqiu Sun ◽  
Yafei Wang ◽  
Yuxia Wang
Keyword(s):  
Remote Sensing ◽  
Urban Area ◽  
Spatial Data ◽  
Urban Expansion ◽  
Remote Sensing Images ◽  
The Past ◽  
Old Maps ◽  
The World ◽  
The City

Studying urban expansion from a longer-term perspective is of great significance to obtain an in-depth understanding of the process of urbanization. Remote sensing data are mostly selected to investigate the long-term expansion of cities. In this study, we selected the world-class urban agglomeration of Beijing-Tianjin-Hebei (BTH) as the study area, and then discussed how to make full use of multi-source, multi-category, and multi-temporal spatial data (old maps and remote sensing images) to study long-term urbanization. Through this study, we addressed three questions: (1) How much has the urban area in BTH expanded in the past 100 years? (2) How did the urban area expand in the past century? (3) What factors or important historical events have changed the development of cities with different functions? By comprehensively using urban spatial data, such as old maps and remote sensing images, geo-referencing them, and extracting built-up area information, a long-term series of urban built-up areas in the BTH region can be obtained. Results show the following: (1) There was clear evidence of dramatic urban expansion in this area, and the total built-up area had increased by 55.585 times, from 126.181 km2 to 7013.832 km2. (2) Continuous outward expansion has always been the main trend, while the compactness of the built-up land within the city is constantly decreasing and the complexity of the city boundary is increasing. (3) Cities in BTH were mostly formed through the construction of city walls during the Ming and Qing dynasties, and the expansion process was mostly highly related to important political events, traffic development, and other factors. In summary, the BTH area, similarly to China and most regions of the world, has experienced rapid urbanization and the history of such ancient cities should be further preserved with the combined use of old maps.

scholarly journals Actually existing silk roads

2017 ◽  
Vol 8 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Magnus Marsden
Keyword(s):  
Middle East ◽  
Silk Road ◽  
Zhejiang Province ◽  
Global Distribution ◽  
Ethnographic Fieldwork ◽  
The Past ◽  
Trading Posts ◽  
The World ◽  
Trade And Exchange ◽  
The City

This article explores the relevance of the concept of Silk Road for understanding the patterns of trade and exchange between China, Eurasia and the Middle East. It is based on ethnographic fieldwork in the city of Yiwu, in China's Zhejiang Province. Yiwu is a node in the global distribution of Chinese ‘small commodities’ and home to merchants and traders from across Asia and beyond. The article explores the role played by traders from Afghanistan in connecting the city of Yiwu to markets and trading posts in the world beyond. It seeks to bring attention to the diverse types of networks involved in such forms of trade, as well as their emergence and development over the past thirty years.

Walk in the history of the city and its environs

10.12737/6572 ◽  
2014 ◽  
Vol 8 (4) ◽  
pp. 20-33
Author(s):  
Наталья Гаршина ◽  
Natalya Garshina
Keyword(s):  
Excursion Theory ◽  
Transmission Of Knowledge ◽  
City Environment ◽  
The Past ◽  
Walking Tour ◽  
The People ◽  
The World ◽  
History Of ◽  
The Right ◽  
The City

Having a look at the tourist space as a cultural specialist, the author drew attention to the fact that the closest to the modern man is a city environment he contacts and sometimes encounters in everyday life and on holidays. And every time whether he wants it or not, it opens in a dif erent way. One way of getting to know the world has long been a walking tour. It’s not just a walk hand in hand with a pleasant man or hasty movement to the right place, but namely the tour, in which a knowledgeable person with a soulful voice will speak about the past and present of the city and its surroundings, as if it is about your life and the people close to you. Turning to the beginning of the twentieth century, the experience of scientists-excursion specialists we today can learn a lot to improve the process of building up a tour, and most importantly the transmission of knowledge about the world in which we live. Well-known names of the excursion theory founders to professionals are I. Grevs, N. Antsiferov, N. Geynike and others. They are given in the context of ref ection on the historical development of walking tours, which haven’t lost their value and attract both creators and consumers of tour services.

scholarly journals The editor's page

2002 ◽  
Vol 69 (415-417) ◽  
pp. 181
Author(s):  
P. Psomopoulos
Keyword(s):  
21St Century ◽  
World Society ◽  
Tsinghua University ◽  
The Past ◽  
University Of British Columbia ◽  
City Regions ◽  
The World ◽  
The University ◽  
The City ◽  
Beijing China

As a documentation and communication vehicle - part of a broader effort of the Athens Center of Ekistics (ACE) to contribute to the development of a sound approach to the field of Human Settlements - Ekistics makes itself available as a free forum for the exposure of ideas and experiences from anywhere to everywhere, provided they are relevant and transferable. In this effort, writings of members of the World Society for Ekistics (WSE) have quite frequently been considered and published in Ekistics. How could our attitude be different in cases of collective efforts of the WSE such as its meetings last year in Berlin (24-28 October, 2001) with the title "Defining Success of the City in the 21st Century"? Actually, we have reported on such events on various occasions in the past, the most recent being in vol. 64, no. 385/386/387, July/August-Sept./Oct.-Nov./Dec.1997 and vol. 65, no. 388/389/390, Jan./Feb.-Mar./Apr.-May/June 1998 on "Mega-Cities ...and Mega-City Regions", a conference of which the WSE was a co-sponsor together with Tsinghua University, Beijing, China, and the University of British Columbia, Canada. We are happy that the World Society for Ekistics welcomed our proposal to consider the large number of documents made available at its meetings in Berlin and select some of the papers presented for publication in Ekistics. However, the amount of material available far exceeded the capacity even of one triple issue. Hence the following two triple issues: Defining Success of the City in the 21st Century - 1 of 2 (Ekistics, vol. 69, no. 412/413/414,January/February-March/April-May/June 2002); and, Defining Success of the City in the 21 st Century - 2 of 2 (Ekistics, vol. 69, no. 415/416/417, July/August-September/October-November/December 2002).

scholarly journals Effects of Mechanical Properties of Concrete with Tio2 and Ggbs

2020 ◽  
Vol 9 (1) ◽  
pp. 1924-1927
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Building Material ◽  
Co2 Emission ◽  
Split Tensile Strength ◽  
The Past ◽  
Sustainable Environment ◽  
Optimum Content ◽  
Strength Tests ◽  
The World

Concrete is the abundant man made material in the world. The quantity of Co2 emission through the industrialized of OPC is almost one ton. The Co2 emission is approximately 7% of the worlds Co2 emission. In order to decrease the Co2 emission and create the sustainable environment we have to develop greener building material. In this the TiO2and GGBS is use in cement on mixing of concrete. In this TiO2 go about as a self cleaning material and the solid with expansion of TiO2 is 1% by mass of the concrete dependent on the past tasks are finished by the scientists and GGBS with 5%, 10% and 15% by mass of cement was prepared. In this research hardened tests are Compressive, Flexural, Split Tensile strength tests of concrete observations mixed with TiO2 and GGBS for optimum content was considered

scholarly journals When "Macbeth" Meets Chinese Opera: A Crossroad of Humanity

2020 ◽  
Vol 21 (36) ◽  
pp. 55-68
Author(s):  
Li Xingxing
Keyword(s):  
Main Character ◽  
Story Line ◽  
Chinese Opera ◽  
Advantages And Disadvantages ◽  
The Past ◽  
The World ◽  
Cantonese Opera ◽  
Lady Macbeth ◽  
The City ◽  
Chinese Public

As one of the four Shakespeare’s great tragedies, Macbeth, with its thrilling story line and profound exploration of human nature, has been adapted for plays and movies worldwide. Though Macbeth was introduced to China just before the May 4th Movement in 1919, its characters and plot have attracted the world in the past 100 years. Macbeth was firstly adapted into a folk play Theft of a Nation during the modern play period, to mock Yuan Shikai’s restoration of the monarchy, who was considered as a usurper of Qing dynasty, followed by Li Jianwu’s adaptation Wang Deming, Kun opera Bloody Hands, Taiwanese version of Beijing opera Lust and the City, Hong Kong version of Cantonese opera The Traitor, Macao version of small theater play If I were the King, Anhui opera Psycho, Shaoxing opera General Ma Long, Wu opera Bloody Sword, a monodrama of Sichuan opera Lady Macbeth, and an experimental Kun opera Lady. Therefore, this essay aims to comb the relations among various adaptations of Macbeth, to discover the advantages and disadvantages of different methodologies by examining the spiritual transformations of the main character Macbeth and reinvention of Lady Macbeth, and ultimately to observe acceptance of Chinese public, which might give thoughts to communications of overseas literature in China.

scholarly journals The Currency of Historicity in Hong Kong: Deconstructing Nostalgia through Soy Milk

2015 ◽  
Vol 44 (4) ◽  
pp. 145-175 ◽  
Author(s):  
Catherine S. Chan
Keyword(s):  
Hong Kong ◽  
Second World War ◽  
World War ◽  
The Past ◽  
The World ◽  
Asian Tigers ◽  
Tv Commercials ◽  
The City ◽  
Second World ◽  
General Criticism

In the 1980s, as the end of the millennium approached, the production of nostalgia exploded all around the world. For Hong Kong, nostalgia became a reminder of the golden age that had transformed the city into one of the “Four Asian Tigers” in the decades following the end of the Second World War. While yearning for the better days of the past, Hong Kong coincidentally experienced destabilisation. As the rest of the world, especially the “baby boomers,” mourned the end of a productive era, Hong Kong locals were disturbed by the affirmation of the handover to China in 1997. In the context of these events, a creative rush to nostalgia in cultural manufacturing swept across the city. In the hope of highlighting the uniqueness of nostalgic production in Hong Kong, this study analyses two sets of TV commercials produced by local beverage company Vitasoy. Through the deconstruction of selected historical events, Vitasoy successfully reinvented its brand and, in contrast to general criticism of the concept, generated a positive connotation for nostalgia on the path towards Hong Kong's search for an identity.

Communing with the Past

PMLA ◽  
2016 ◽  
Vol 131 (3) ◽  
pp. 765-773 ◽  
Author(s):  
Raúl Coronado
Keyword(s):  
The Past ◽  
The World ◽  
Great Sense ◽  
The Right ◽  
The City

I Spent Muggy Chicago Summers Indoors, Tapping at my Keyboard, Churning Out Pages of My Book Manuscript, Following the paths of people's lives, obsessing over the right turn of phrase. When I grew lonely (which I always inevitably did), I'd head out to the Starbucks on Wilson and Magnolia, comforting myself with the sounds of people around me. I wrote better late at night, when night had descended and lulled everyone to sleep. I felt then a great sense of relief, tranquility, buoyed by nothing else but the swirl of ideas, because everyone around me in my world had settled down for the night. It was then that I was not distracted by the world of the living. Summer in Chicago, after all, was an exuberantly social season. The city exploded with life; throngs of runners would peel their shirts off in the humid heat as they sprinted along Lakefront Trail. But for me, invitations to barbecues, beach parties, and weekend getaways to Saugatuck were left unanswered: I had my book to write.

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