Evolution of Storage Media Technology Within the Data Centre

Evolution of Storage Media Technology Within the Data Centre AN INVESTIGATION INTO THE EVOLUTION OF STORAGE MEDIA TECHNOLOGY WITHIN THE DATA CENTRE TO SUPPORT THE I/O REQUIREMENTS OF MODERN APPLICATIONS. Chandan Chandapura Ramesh (x14111306) Abstract Technology has always played a tremendous role in evolution of data storage media from the very starting punch cards to the present flash drives and from kilobytes to terabytes. The evolution of storage included from the standardization of storage devices i.e from large trunks of kilobytes storage media to very small microchip having the great storage capacity of gigabytes. However, in this paper we will look into evolution of storage devices from magnetic tape, magnetic drum, DRAM, FLOPPYs , CDs, DAT, DDS, MOD, , Micro drive, Multimedia Card SD card, Cloud backup solutions. Finally, in this article about evolution about storage devices, we will look into an assessment providing solutions for tiered storage solutions and its development with reference oracle, netapp tiered storage solutions and storage based on present storage trends. INRODUCTION As the time passed by, along with the time technology too has evolved in every step of life from basic needs to the advanced mode of humanity. Concurrently, the evolution in technology of computers has played a prominent role for humankind. Therefore, as the storage medium has also played a major role in computer architecture. Zetta. (2015) say as the computers evolved the storage mediums too had evolved, it all started from punch cards to present storage mediums like those that flash drives to SSD, companies have started to be relied on cloud backup solutions supported by data centers. As per the need of todays Business strategies the requirement for data storage has increased tremendously compared to past five years and to mitigate the costs over storage of data, it has been segregated and designed as structured, semi-structured and unstructured data and they have been stored. As the data is considered officially as corporate assets, there has always been attacks that are more vulnerable. Therefore, data hardening has been a big challenge but still many third party companies have been working towards its excellence. Few measures which have been considered under the improvisation level are SAN, Fiber channel over Ethernet (Fcoe), Internet protocol, Converged Network Adapter (CNA) etc. The storage network technology in the datacenters has been developed into many different configurations, which are DAS (direct attached storage), NAS (Network attached storage), SAT (Storage area networks). In further section we will look this structures with much more details. BACKGROUND: After looking into all the prospective over the storage media briefly will have a detailed discussion over each storage model and it evolution. Magnetic tape: PCMag digital group. (2015) say it was the first few recording mediums used to record music. The data recorded was actually in sequential format. It was manufactured by a ferromagnetic material the disadvantage of these tapes was they would be contaminated if they were not rolled and packed tightly. The tracks on storage device were running parallel to each other, which is called as parallel recording. In computing magnetic tapes are used to store auxiliary type of information. An excellent example for the computer system, which used magnetic tape, was UNIVAC. It had the capacity to handle 128 characters per inch so they were widely used in computers in earlier days. Magnetic drum: Webopedia. (2015) it was direct access storage device, which was metallic cylinder, which was coated by a material called magnetic-iron-oxide. The tracks recorded on the cylindrical device were stored in channels and it was capable of holding 200 tracks were the drum used to rotate at 3000rpm. But still it had a drawback which is that they were not able to store too much of data. DRAM (dynamic random access memory): it is a medium that is been used store the memory temporarily and it is been used widely in todays computer systems. It is made up of small capacitor and transistors. Dram has many cells and each cell is equal to a Bit. The elements on Dram are organized in rows and columns. Todays computers use these cells in megabyte modules. FLOPPYs: Riaz, Rashid et al (2015) say it is portable computer storage disks were data could be handled easily. They are more fragile, low at cost. It was highly dispensable for the people working on their personnel laptops and other processors. It poses a capacity of 250kb to 1.6 mb so it varies on the size of the disk. CDs, DAT, DDS, MOD, Multimedia Card, Micro drive, SD card were the next generation storage medias. CD-ROM was highly used to save and retrieve the data immensely on the systems. DAT was the digital recording table, which was actually released by the Sony in 1987. The main advantage is the data is recorded digitally rather that in analog style. But when compared to CD the performance of DAT is higher and advanced. Micro drives or so called flash drives are portable storage drives used to transfer small amount data very fast and efficiently and so on still the storage media has always been improvising till the present holographic storage formats and still going on giving out the services. Evolution of technologies in Data center storage services: Until now, we had brief discussion of different storage technologies in common IT infrastructures. SIEMON. (2015) say as the time has passed by evolution of DATA center has taken place in parallel. However, it was much more advanced as the data stored in the data center is considered as the corporate assets. so to store data securely different storage models have been introduced they are SAN, Fiber channel over Ethernet (Fcoe) , internet protocol, converged network adapter (CNA) under doff rent configurations like DAS (direct attached storage), NAS (Network attached storage), Further, in this paper will briefly look into every step of these evolution strategies. SAN (storage area network): [6] it is a high-speed network for the storage devices, which would be connected to the servers. The main advantage of SAN is it provides great assistance in backing up the data and disaster recovery. SAN uses fiber optic cable so that the data transfer rate from one location to different location will be high. Fiber channel over Ethernet (Fcoe): [6] it provides a great solution for the organizations possessing parallel network infrastructure issues. Fiber channel gives a high-speed data transfer protocol serially and standards for enterprise grade storage solutions, the transfer rates can be up to 10gbs. Fiber channels operate at great speeds like 4,16, 32 gb/s , but generally in IEEE 802.3ae standards the distance supported for 10GB Ethernet is 10km. so it is highly privileged in datacenters. Internet protocol:[6] it is group or singular drive which are combined together but they are not part of storage network but considered to be more over the internal storage media on personnel laptops. NAS (network-attached storage): [6] offers high-level storage solutions in file sharing services because the architecture is directly connected to LAN. However, because of these characters in NAS it synchronizes hardware storage resources into network, so it can be used to develop multiple networked services and by doing this storage utilization is very efficient. So based on the above technologies the storage solutions have been improvised but still there many technological labs still working on improvement on the performance, reliability and so on. Storage Media Solutions: In this paper will further discuss and present an assessment on tiered storage media solution on any top two companys depended on any context of the data at any particular time. We will be taking Netapp tiered storage solutions and Oracle tiered storage solutions. Tiered storage solutions: TechTarget (2005) the storage solutions are to segregation of data based on the company-defined policies to reduce the cost effectiveness of the data. The segregation may include different categories like performance, usage, security and so on. [6] Tiered storage consists few different tiers like tier 1, 2 and 3 data. Tier 1 includes highly sensitive data so data isolation is main aspect hence they are stored in expensive media solutions. Tier 2 data will consist of type two classified files so the storage media expense is reduced. In Tier 3 it consists of unclassified data the expenses are very less as the data is stored in in less expensive media. Oracle Tired Storage Solution Service: Oracle optimized solutions (2015) the main aim of oracle tiered solution is to provide highly efficient scalability and flexibility for the data. An always-new data storage trend was needed for better storage efficiency. As the data grows there was an opportunity arising for new wave lengths, Based on this aspects oracle offered optimized tiered solution to protect data as well, lower cost for storage and massive scalability. [3] providing Oracles disk and tape storage systems for better performance than many other storage media Introducing Oracle Storage tek modular tape gives a high throughput at lower cost and Oracle e Hierarchical Storage Manager provides configurable file system view and policy based management and data protection. They predicted that reduced deployment provides additional savings. Reduced data risk due to pretesting, ensured access and data integrity. They provide higher quality of the data availability and integrity. Oracle applies all the tiers for the data s torage solutions based on the client requirements. Oracle’s StorageTek T10000D offers outstanding bit error rate. it predicts that it offers 12.6 times better TCO than EMC isilonn soln. Netapp Tired Storage Solution Service: NetApp (2012) has great views towards the optimizing storage efficiency and performance. The main solution they give is, the right data at the right time at the right cost. Netapp provides a very different and unique way of solution for storing the data with an automated way of approach. The virtual tier provides a real time response to most of the demanding applications, ability to consolidate the data others tiers whenever required, conducting data cloning and SSD technologies. Basically provides reduced power -cooling storage. The developed flash technology in the [2] storage tiers of Netapp has helped in increasing the efficiency of the storage solutions. The key advantage of Netapp services provided for storage infrastructure will be the self-managing data-driven service layer. It helps mitigating the costs based on the performance for the classification of the data. The major feature to help the performance of the workloads would be the Netapp Flash Cache PCI-e-based modules. The workloads are like the file service workloads and OLTP workload etc†¦ Conclusion: In this paper, we initially discussed about the evolution of the storage media as the time it was integrated including the storage architecture. We even took a brief review about two companies’ providing storage services which are oracle tier storage solutions and netapp tier storage solutions. we actually had a view how both the companies mitigate the storage structure difficulties and provide a wide range of solutions for the clients which is a good prospective towards the development. The tiered storage solutions of each different vendors are competitive which indirectly supporting the development of the storage technologies. The tiered storage solutions describes the different levels of the storage entities set-up with different clients based on the value of the data. So we conclude telling that the development of storage solutions has to be much more improvised based on the requirement and developments. Bibliography: 1) Memory information. [Online] Available from: http://www.memoryinformation.com/dram.htm [Time accessed 2:38 am, date 4/6/2015] 2) NetApp (2012) â€Å"NetApp Virtual Storage Tier† [Online] 2012 Available from: http://www.netapp.com/us/technology/virtual-storage-tier/ [Time accessed 12:32 am, date 7/4/2015] 3) Oracle optimized solutions (2015) â€Å"Maximize Storage Efficiencies for Sharing Data Oracle Optimized Solution for Tiered Storage Infrastructure† [online] January 2015 Available from: http://www.oracle.com/us/solutions/oos/tiered-storage-infrastructure/tiered-storage-infra- bus-wp- 1911879.pdf [Time accessed 12:39 am, date 7/4/2015] 4) PCMag digital group. (2015) â€Å"ENCYCLOPEDIA† [online] 2015 Available from: http://www.pcmag.com/encyclopedia/term/46499/magnetic-tape [Time accessed 2.08 am, date 4/6/2015] 5) Riaz, Rashid. Floppy Disk.How Products Are Made. 1994.Encyclopedia.com.10 Apr. 2015 Available from: http://www.encyclopedia.com/topic/Floppy_Disk.aspx [Time accessed 2.48pm, date 4/6/2015] 6) SIEMON. (2015) â€Å"Data Center Storage Evolution†. [Online] 2015. Available from: http://www.siemon.com/us/white_papers/14-07-29-data-center-storage-evolution.asp [Time accessed 1:18 am, date 4/6/2015] 7) TechTarget (2005) â€Å"Tiered storage† [online] September 2005 Available from: http://searchstorage.techtarget.com/definition/tiered-storage [Time accessed 8:45pm, date 10/4/2015] 8) Webopedia. (2015) â€Å"magnetic drum† [online] 2015 Available from: http://www.webopedia.com/TERM/M/magnetic_drum.html [Time accessed 2.18 am, date 4/6/2015] 9) Webopedia. (2015) â€Å"SAN-storage area network† [online] 2015 Available from: http://www.webopedia.com/TERM/S/SAN.html [Time accessed 8:27 pm, date 6/4/2015] 10) Wikipedia (2015) â€Å"Digital Audio Tape†. [Online] March 2015. Available from http://en.wikipedia.org/wiki/Digital_Audio_Tape#References [Accessed: 8:10 pm, date10/4/2015] 11) Zetta. (2015) â€Å"The History of Computer Storage†. [Online] February 2015. Available from: http://www.zetta.net/history-of-computer-storage/ [Time accessed 4/5/2015, 11:35 pm] 12) Goda, K.; Kitsuregawa, M., The History of Storage Systems,Proceedings of the IEEE, vol.100, no.Special Centennial Issue, pp.1433,1440, May 13 2012 doi: 10.1109/JPROC.2012.2189787 URL:http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=arnumber=6182574isnumber=6259910 13) Knowles, Mike, Survey of the storage evolution,User Group Conference, 2003. Proceedings, vol., no., pp.362,367, 9-13 June 2003 doi: 10.1109/DODUGC.2003.1253418 URL:http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=arnumber=1253418isnumber=28042 1

Delhi Metro

Delhi Metro (Hindi: Dilli Me? ro) is a rapid transit system serving Delhi, Gurgaon, Noida and Ghaziabad in the National Capital Region of India. It is one of the largest metro networks in the world. The network consists of six lines with a total length of 189. 63 kilometres (117. 83  mi) with 142 stations of which 35 are underground. It has a combination of elevated, at-grade and underground lines and uses both broad gauge and standard gauge rolling stock. Four types of rolling stock are used: Mitsubishi-ROTEM Broad gauge, Bombardier MOVIA, Mitsubishi-ROTEM Standard gauge and CAF Beasain Standard gauge. Delhi Metro is being built and operated by the Delhi Metro Rail Corporation Limited (DMRC)under Akshay Mittal. As of November 2010, DMRC operates around 2,700 trips daily between 6:00 and 23:00 running with an interval of 2 minutes 30 seconds between trains at peak frequency. 3][8] The trains are mainly of four coaches, but due to increase in passengers numbers, six-coach trains are also added on the Red Line (Dilshad Garden to Rithala), Yellow Line (Jahangirpuri to HUDA city centre), Blue Line (Dwarka sec ? 21 to Vaishali/NOIDA city centre) and Violet Line (Central Secretariat to Badarpur). [6][7][8][9] The power output is supplied by 25-kilovolt, 50 Hertz alternating current through overhead catenary. The metro has an average daily ridership of 1. 6 million commuters,[2] and, as of July 2011, had carried over 1. 25 billion commuters s ince its inception. 10] The Delhi Metro Rail Corporation has been certified by the United Nations as the first metro rail and rail-based system in the world to get â€Å"carbon credits for reducing greenhouse gas emissions† and helping in reducing pollution levels in the city by 6. 3 lakh tonne every year. [11] Planning for the metro started in 1984, when the Delhi Development Authority and the Urban Arts Commission came up with a proposal for developing a multi-modal transport system for the city. The Government of India and the Government of Delhi jointly set up the Delhi Metro Rail Corporation (DMRC) in 1995. Construction started in 1998, and the first section, on the Red Line, opened in 2002, followed by the Yellow Line in 2004, the Blue Line in 2005, its branch line in 2009, the Green and Violet Lines in 2010 and the Delhi Airport Metro Express in 2011. | | History [edit] Background The concept of a mass rapid transit for New Delhi first emerged from a traffic and travel characteristics study which was carried out in the city in 1969. [12] Over the next several years, many official committees by a variety of government departments were commissioned to examine issues related to technology, route alignment and governmental jurisdiction. 13] In 1984, the Delhi Development Authority and the Urban Arts Commission came up with a proposal for developing a multi-modal transport system, which would consist of constructing three underground mass rapid transit corridors as well augmenting the city's existing suburban railway and road transport networks. [14] While extensive technical studies and t he raising of finance for the project were in progress, the city expanded significantly resulting in a twofold rise in population and a fivefold rise in the number of vehicles between 1981 and 1998. 14] Consequently, traffic congestion and pollution soared, as an increasing number of commuters took to private vehicles with the existing bus system unable to bear the load. [12] An attempt at privatising the bus transport system in 1992 merely compounded the problem, with inexperienced operators plying poorly maintained, noisy and polluting buses on lengthy routes, resulting in long waiting times, unreliable service, extreme overcrowding, unqualified drivers, speeding and reckless driving. 15] To rectify the situation, the Government of India and the Government of Delhi jointly set up a company called the Delhi Metro Rail Corporation (DMRC) on March 5, 1995 with E. Sreedharan as the managing director. [16] [edit] Construction Physical construction work on the Delhi Metro started on Oct ober 1, 1998. [17] After the previous problems experienced by the Kolkata Metro, which was badly delayed and 12 times over budget due to â€Å"political meddling, technical problems and bureaucratic delays†, the DMRC was given full powers to hire people, decide on tenders and control funds. 18] The DMRC then consulted the Hong Kong MTR on rapid transit operation and construction techniques. [19] As a result, construction proceeded smoothly, except for one major disagreement in 2000, where the Ministry of Railways forced the system to use broad gauge despite the DMRC's preference for standard gauge. [20] The first line of the Delhi Metro was inaugurated by Atal Behari Vajpayee, the then Prime Minister of India on December 24, 2002[21] and thus it became the second underground rapid transit system in India, after the Kolkata Metro. The first phase of the project was completed in 2006[22] on budget and almost three years ahead of schedule, an achievement described by Business Week as â€Å"nothing short of a miracle†. [23] [edit] Network Main article: List of Delhi metro stations The Delhi Metro is being built in phases. Phase I completed 65. 11  km (40. 46  mi) of route length, of which 13. 01  km (8. 08  mi) is underground and 52. 10  km (32. 37  mi) surface or elevated. The inauguration of the Indraprastha–Barakhamba Road corridor of the Blue Line marked the completion of Phase I on October 27, 2006. 22] Phase II of the network comprises 128  km (80  mi) of route length and 79 stations, and is fully completed, with the first section opened in June 2008 and the last line opened in August 2011. [24] Phases III (112  km) and IV (108. 5  km) are planned to be completed by 2015 and 2021 respectively, with the network spanning 413  km (257  mi) by then. [25 Red Line Main articl e: Red Line (Delhi Metro) The Red Line was the first line of the Metro to be opened and connects Rithala in the west to Dilshad Garden in the east, covering a distance of 25. 09 kilometres (15. 59  mi). 27] It is partly elevated and partly at grade, and crosses the Yamuna River between Kashmere Gate and Shastri Park stations. [30] The inauguration of the first stretch between Shahdara and Tis Hazari on December 24, 2002, caused the ticketing system to collapse due to the line being crowded to four times its capacity by citizens eager to have a ride. [31][32] Subsequent sections were inaugurated from Tis Hazari – Trinagar (later renamed Inderlok) on October 4, 2003,[33] Inderlok – Rithala on March 31, 2004, and Shahdara – Dilshad Garden on June 4, 2008. [34] [edit] Yellow Line Main article: Yellow Line (Delhi Metro) The Yellow Line was the second line of the Metro and was the first underground line to be opened. [35] It runs for 44. 36 kilometres (27. 56  mi) from north to south and connects Jahangirpuri with HUDA City Centre. The northern and southern parts of the line are elevated, while the central section through some of the most congested parts of Delhi is underground. The first section between Vishwa Vidyalaya and Kashmere Gate opened on December 20, 2004, and the subsequent sections of Kashmere Gate – Central Secretariat opened on July 3, 2005, and Vishwa Vidyalaya – Jahangirpuri on February 4, 2009. 34] This line also possesses the country's deepest Metro station at Chawri Bazaar, situated 30 metres (98  ft) below ground level. [36][37] On 21 June 2010, an additional stretch from Qutub Minar to HUDA City Centre in Gurgaon was opened, initially operating separately from the main line. However, Chhatarpur station on this line opened on August 26, 2010. Due to delay in acq uiring the land for constructing the station, it was constructed using pre-fabricated structures in a record time of nine months and is the only station in the Delhi metro network to be made completely of steel. 38][39] The connecting link between Central Secretariat and Qutub Minar opened on September 3, 2010. [40] Interchanges are available with the Red Line at Kashmere Gate station, Blue Line at Rajiv Chowk Station, Violet Line at Central Secretariat , and with the Indian Railways network at Delhi and New Delhi railway stations. [41][42] [edit] Blue Line Main article: Blue Line (Delhi Metro) The Blue Line was the third line of the Metro to be opened, and the first to connect areas outside Delhi. 43] Partly overhead and partly underground,[44] it connects Dwarka Sub City in the west with the satellite city of Noida in the east, covering a distance of 47. 4 kilometres (29. 5  mi). [43] The first section of this line between Dwarka and Barakhamba Road was inaugurated on December 3 1, 2005, and subsequent sections opened between Dwarka – Dwarka Sector 9 on April 1, 2006, Barakhamba Road – Indraprastha on November 11, 2006, Indraprastha – Yamuna Bank on May 10, 2009, Yamuna Bank – Noida City Centre on November 12, 2009, and Dwarka Sector 9 – Dwarka Sector 21 on October 30, 2010. 34] This line crosses the Yamuna River between Indraprastha and Yamuna Bank stations,[30] and has India's first extradosed bridge across the Northern Railways mainlines near Pragati Maidan. [45] A branch of the Blue line, inaugurated on January 8, 2010, takes off from Yamuna Bank station and runs for 6. 25 kilometres (3. 88  mi) up to Anand Vihar in east Delhi. [46] It was further extended up to Vaishali which was opened to public on July 14, 2011. [47][48] A small stretch of 2. 76 kilometres (1. 71  mi) from Dwarka Sector 9 to Dwarka Sector 21 was inaugurated on October 30, 2010. 49][50] Interchanges are available with the Yellow Line at Rajiv Cho wk station,[44] and with the Indian Railways network at the Anand Vihar Railway Terminal. [51] [edit] Green Line Main article: Green Line (Delhi Metro) Opened in 2010, the Green Line was the first standard-gauge corridor of the Delhi Metro. [28] The fully elevated line connects Mundka with Inderlok, running for 15. 1 kilometres (9. 4  mi) mostly along Rohtak Road. [52] An interchange with the Red line is available at Inderlok station via an integrated concourse. [53] This line also has the country's first standard-gauge maintenance depot at Mundka. 54] [edit] Violet Line Main article: Violet Line (Delhi Metro) The Violet Line is the most recent line of the Metro to be opened, and the second standard-gauge corridor after the Green Line. The 20. 2  km (12. 6  mi) long line connects Badarpur to Central Secretariat, with 9  km (5. 6  mi) being overhead and the rest underground. [29] The first section between Central Secretariat and Sarita Vihar was inaugurated on October 3, 20 10, just hours before the inaugural ceremony of the 2010 Commonwealth Games, and connects the Jawaharlal Nehru Stadium which is the venue for the opening and closing ceremonies of the event. 55] Completed in just 41 months, it includes a 100  m (330  ft) long bridge over the Indian Railways mainlines and a 167. 5  m (550  ft) long cable-stayed bridge across an operational road flyover, and connects several hospitals, tourist attractions and a major industrial estate along its route. [29] Services are provided at intervals of 5 min. [55] An interchange with the Yellow Line is available at Central Secretariat through an integrated concourse. [29] On January 14, 2011, the remaining portion from Sarita Vihar to Badarpur was opened for commercial service, adding three new stations to the network and marking the completion of the line. Airport Express The Airport Express line runs for 22. 7  km (14. 1  mi) from New Delhi Railway Station to Dwarka Sector 21, linking the Indira Gandhi International Airport. The line is operated, by the Delhi Airport Metro Express Pvt. Limited (DAMEL), a subsidiary of Reliance Infrastructure, the concessionaire of the line. [56] Constructed at a cost of [pic]2,885 crore (US$548. 15 million),[57] the line has six stations (Dhaula Kuan and Delhi Aerocity became operational on August 15, 2011), with some featuring check-in facilities, parking and eateries. 58] Rolling stock consists of six-coach trains operating at intervals of ten minutes and having a maximum speed of 135  km/h (84  mph). [58] Originally scheduled to open before the 2010 Commonwealth Games, the line failed to obtain the mandatory safety clearance, and was opened on 24 February 2011, after a delay of around 5 months. [59][60] Finances [edit] Funding The capital cost of Phases I and II has been estimated to be [pic]14,430 crore (US$2. 74 billion) at 2004 prices. [73] However, more recent estimates have placed the cost of construction at [pic]200 crore (US$3 8 million) per kilometre. 74] Thirty percent of the total investment for Phases I and II has been raised through equity capital with the Government of India (GoI) and Government of Delhi contributing equal shares,[73] and approximately another 60 percent has been raised as either long-term or subordinate debt, through soft loans from the Japan Bank for International Cooperation. [75] The rest of the investment is proposed to be recovered from internal revenues through operations and property development. [73] The Metro also received [pic]1,914. 3 crore (US$363. 7 million) as grant-in-aid from various agencies for the financial year ending March 2009. 76] As of August 7, 2010, Delhi Metro has paid back an amount of [pic]567. 63 crore (US$107. 85 million), which includes loan amount for Phase I and interest amounts for Phases I and II, to the Japan International Cooperation Agency (JICA). [77] [edit] Revenue and profits In 2007, the Delhi Metro claimed to be one of only five metro sys tems in the world that operated at a profit without government subsidies. This was enabled by keeping maintenance costs to a minimum and harnessing additional revenue from advertisements and property development, apart from ticket sales. 78][79] The Metro also generates revenue by leasing out its trains and stations for film shoots. Due to its increasing association with Delhi as an image of the city's everyday life, it has been a popular filming location for production houses, and several films and advertisements have been shot on board. [80][81] Producers have to pay as much as [pic]1 lakh (US$1,900) for every hour of filming, besides a security deposit and insurance. [80] For the financial year ended March 2008, the Metro reported operating revenues of [pic]305. 27 crore (US$58 million) and a profit before tax of [pic]19. 8 crore (US$3. 8 million),[82] which rose to [pic]723. 77 crore (US$137. 5 million) and [pic]90. 43 crore (US$17. 2 million) respectively for the financial year ended March 2009. [76] Operations Trains operate at a frequency of 3 to 4. 5 minutes between 6:00 and 23:00. Trains operating within the network typically travel at speeds below 80  km/h (50  mph), and stop about 20 seconds at each station. Automated station announcements are recorded in Hindi and English. Many stations have services such as ATMs, food outlets, cafes and convenience stores. Eating, drinking, smoking, and chewing of gum are prohibited in the entire system. The Metro also has a sophisticated fire alarm system for advance warning in emergencies, and fire retardant material is used in trains as well as on the premises of stations. [83] Navigation information is available on Google Transit. [84] The first coach of every train is reserved for women. [85][86] [edit] Security Security on the Delhi Metro is handled by the Central Industrial Security Force (CISF), who have been guarding the system ever since they took over from the Delhi Police in 2007. 87] Closed-circuit cameras are used to monitor trains and stations, and feed from these is monitored by both the CISF and Delhi Metro authorities at their respective control rooms. [88] Over 3500 CISF personnel have been deployed to deal with law and order issues in the system, in addition to metal detectors, X-ray baggage inspection systems and dog squads which are used to secure the system. [89] Intercoms are pr ovided in each train car for emergency communication between the passengers and the Train operator. 90] Periodic security drills are carried out at stations and on trains to ensure preparedness of security agencies in emergency situations. [91] [edit] Ticketing For the convenience of customers, Delhi Metro commuters have three choices for ticket purchase. The RFID tokens are valid only for a single journey on the day of purchase and the value depends on the distance travelled, with fares for a single journey ranging from [pic]8 (US$0. 15) to [pic]30 (US$0. 57). Fares are calculated based on the origin and destination stations using a fare chart. 92] A common ticketing facility for commuters travelling on Delhi Transport Corporation (DTC) buses and the Metro will be introduced in 2011. [93] Travel cards are available for longer durations and are most convenient for frequent commuters. They are valid for one year from the date of purchase or the date of last recharge, and are availabl e in denominations of [pic]100 (US$1. 9) to [pic]800 (US$15. 2). A 10% discount is given on all travel made on it. [94] A deposit of [pic]50 (US$0. 95) needs to be made to buy a new card. [92] Tourist cards can be used for unlimited travel on the Delhi Metro network over short periods of time. There are two kinds of tourist cards valid for one and three days respectively. The cost of a one-day card is [pic]100 (US$1. 9) and that of a three-day card is [pic]250 (US$4. 8), besides a refundable deposit of [pic]50 (US$0. 95) that must be paid at the time of purchasing the card. [92] As the network has expanded, high ridership in new trains have led to increasing instances of overcrowding and delays on the Delhi Metro. [95][96] To alleviate the problem, orders for new 6 coach trains have been placed and an increase in the frequency of trains has been proposed. 95] Infrequent, overcrowded and erratic feeder bus services connecting stations to nearby localities have also been reported as an area of concern. [97][98] In 2010, severe overcrowding on the Yellow Line, which connects the north and south campuses of Delhi University, was reported to be a reason for students missing or reporting late for classes. [99] [edit] Ridership Delhi Metro recorded the highest ever ridership figu re of 2,066,925 on 20 August 2011, which surpassed the earlier record set on 01 August 2011, when 1,830,944 people traveled by the Metro. 100] Currently, DMRC has a pool of 200 train sets with 69 of these being six coach formations. At present; the Delhi Metro is operational on six lines where more than 2500 train trips are made each day traversing over 69000 KMs in a day. With Phase-III of the network expected to cover about 108 kilometers, the Delhi Metro network will become 295 kilometers by 2016 making it one of the fastest expanding Metro networks in the world carrying about 4 million (40 lakh) passengers. [101] [edit] Accidents On October 19, 2008, a girder launcher and a part of the overhead Blue Line extension under construction in Laxmi Nagar, East Delhi collapsed and fell on passing vehicles underneath. Workers were lifting a 400-tonne concrete span of the bridge with the help of a crane when the launcher collapsed along with a 34 metres (112  ft) long span of the bridge on top of a Blueline bus killing the driver and a labourer. [102] On July 12, 2009, a portion of a bridge under construction collapsed when its launching girder lost balance as it was being erected at Zamrudpur, near East of Kailash, on the Central Secretariat – Badarpur corridor. Six people were killed and 15 others injured. [103] The day after, on July 13, 2009, a crane that was removing the debris collapsed, and with a bowling pin effect collapsed two other nearby cranes, injuring six. [104] On July 22, 2009 a steel beam fell on a worker at the under-construction Ashok Park Metro station, killing him. [105] Over a hundred people, including 93 workers, have died since work on the metro began in 1998. [106] [edit] Rolling stock The Metro uses rolling stock of two different gauges. Phase I lines use 1,676  mm (5. 499  ft) broad gauge rolling stock, while three Phase II lines use 1,435  mm standard gauge rolling stock. [108] Trains are maintained at seven depots at Khyber Pass and Sultanpur for the Yellow Line, Mundka for the Green Line, Najafgarh and Yamuna Bank for the Blue Line, Shastri Park for the Red Line and Sarita Vihar for the Violet Line. [29][109][110][111][112] [edit] Broad gauge The broad gauge rolling stock is manufactured by two major suppliers. For the Phase I, the rolling stock was supplied by a consortium of companies comprising Hyundai Rotem, Mitsubishi Corporation, and MELCO. The coaches were initially built in South Korea by ROTEM,[113] then in Bangalore by BEML through a technology transfer arrangement. [114] These trains consist of four 3. 2-metre (10  ft) wide stainless steel lightweight coaches with vestibules permitting movement throughout their length and can carry up to 1500 passengers,[115] with 50 seated and 330 standing passengers per coach. 116] The coaches are fully air conditioned, equipped with automatic doors, microprocessor-controlled brakes and secondary air suspension,[117] and are capable of maintaining an average speed of 32  km/h (20  mph) over a distance of 1. 1  km (0. 68  mi). [116] The system is extensible up to eight coaches, and platforms have been designed accordingly. [115] The rolling stock for Phase II is being supplied by Bombardier Transportation, which has received an order f or 614 cars worth approximately US$ 1100 million. 118] While initial trains were made in Germany and Sweden, the remainder will be built at Bombardier's factory in Savli, near Vadodara. [119] These trains are a mix of four-car and six-car consists, capable of accommodating 1178 and 1792 commuters per train respectively. The coaches possess several improved features like Closed Circuit Television (CCTV) cameras with eight-hour backup for added security, charging points in all coaches for cell phones and laptops, improved air conditioning to provide a temperature of 25 degrees Celsius even in packed conditions and heaters for winter. 120] [edit] Standard gauge The standard gauge rolling stock is manufactured by BEML at its factory in Bangalore. The trains are four-car consists with a capacity of 1506 commuters per train,[121] accommodating 50 seated and 292 standing passengers in each coach. [116] These trains will have CCTV cameras in and outside the coaches, power supply connections inside coaches to charge mobiles and laptops, better humidity control, microprocessor-controlled disc brakes,[122] and will be capable of maintaining an average speed of 34  km/h (21  mph) over a distance of 1.   km (0. 68  mi). [116] [edit] Airport Express Eight 6-car trains supplied by CAF Beasain of Spain were imported. [123] CAF holds 5% equity in the DAME project, Reliance Infrastructure holds the remaining 95%. [57] The trains on this line are entirely different from the existing ones and have in-built noise reduction features for a noise-free ride with padded fabric seats. The coaches are equipped with LCD screens for entertainment of the passengers and also provide flight information for convenience of air travellers. The trains are fitted with an event recorder which can withstand high levels of temperature and impact and the wheels have flange lubrication system for less noise and better riding comfort. [124] [edit] Maglev On 7 December 2011, the government informed the Rajya Sabha that it was planning to introduce magnetic levitation wheel-less trains on the Delhi Metro. Minister of State for Urban Development Saugata Roy said: â€Å"The Delhi Metro proposes to introduce the wheel-less trains. The introduction of Maglev technology of Metro connectivity by DMRC is only at a conceptual stage for the present. â€Å"[125] The Maglev technology uses magnetic levitation to suspend, guide and propel mass rapid systems. [edit] Signalling and telecommunication The Delhi Metro uses cab signalling along with a centralised automatic train control system consisting of automatic train operation, Automatic Train Protection and automatic train signalling modules. 126] A 380  MHz digital trunked TETRA radio communication system from Motorola is used on all 6 lines to carry both voice and data information. [127] For Line 3,4 Siemens Transportation Systems has supplied the electronic interlocking Sicas, the operation control system Vicos OC 500 and the automation control system LZB 700 M. [128] An integrated system comprising optical fibre cable, on-train radio, CCTV, and a centralised clock and public address system is used for telecommunication during train operations as well as emergen cies. 129] For Line-1 and Line-2 ALSTOM has supplied signalling system and for line 5,6 Bombardier has supplied signalling system. [edit] Environment and aesthetics The Delhi Metro has won awards for environmentally friendly practices from organisations including the United Nations,[130] RINA,[131] and the International Organization for Standardization,[131] becoming the second metro in the world, after the New York City Subway, to be ISO 14001 certified for environmentally friendly construction. [132] Most of the Metro tations on the Blue Line conduct rainwater harvesting as an environmental protection measure. [133] It is also the first railway project in the world to earn carbon credits after being registered with the United Nations under the Clean Development Mechanism,[134] and has so far earned 400,000 carbon credits by saving energy through the use of regenerative braking systems on its trains. [135] The Metro has been promoted as an integral part of community infrastructure, and community artwork depicting the local way of life has been put on display at stations. 136] Students of local art colleges have also designed decorative murals at Metro stations,[137] while pillars of the viaduct on some elevated sections have been decorated with mosaic murals created by local schoolchildren. [138] The Metro station at INA Colony has a gallery showcasing artwork and handicrafts from across India,[139] while all stations on the Central Secretariat – Qutub Minar section of the Yellow Line have panels installed on the monumental architectural heritage of Delhi. [

Essay about Artists Work from Their Own Experiences

Artists work from their own experiences, imaginings, feelings and psychological experiences * Jackson Pollock * Picasso * Jeff Koons The personal experiences of the artists consisting of the subjective and psychological happenings create thoughts and imaginings which are all combined to fuel the art-making process. Artists harness their personal and psychological experiences, imaginings and feelings to engender their artwork. Jackson Pollock, Picasso and Jeff Koons are artists that use their experience to form their art. Jackson Pollock led a life of fame and notoriety produced by a life of hardships, hard work and bad habits. He was an American Abstract Expressionist who defied every rule of harmony and good taste in†¦show more content†¦His marriage with Lee Krasner marked a new period of creativity. In 1957 Pollock abandoned all recognizable elements in his pictures and committed himself to abstraction. 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Terrorism Is A Global Issue - 1462 Words

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