achievement was made in optical science over the course of the next century. Physicists Daniel Collodon and Jacques Babinet reported in the 1840s that light could be directed along jets of water for fountain displays. In 1854‚ John Tyndall‚ a British physicist‚ demonstrated that light could travel through water jets‚ thereby
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Briefly describes the difference between Storage Area Networks (SANs) and Network Attached Storage (NAS) system? Storage Area Networks (SANs) | Network Attached Storage (NAS) system | A SAN is a dedicated network that provides access to various types of storage devices including type libraries‚ optical juke boxes and disk arrays. | Network Attached storage system are networked appliances which contain one or more hard drives that can be shared with multiple heterogeneous computers. |
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Noun | 1. | water pollution - pollution of the water in rivers and lakespollution - undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities | ------------------------------------------------- ------------------------------------------------- http://www.thefreedictionary.com/Water+pollutant ------------------------------------------------- ------------------------------------------------- Effects of Water Pollution
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sector (PEM‚ 2003). As stated in the EMB report‚ domestic wastewater discharges contribute highest to the BOD load as the lack of sewage treatment system allows more than 90 percent of inadequately treated domestic sewage to be discharged into surface waters‚ which contain bacteria and viruses that threaten human life. Geographically‚ data show that one-third (30 percent) of BOD generation comes from Metro Manila and Region IV alone‚ at 18 and 15 percent‚ respectively (PEM‚ 2003). Industrial wastewater
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Water Technology Hardness of Water: Natural waters containing large quantities of dissolved salts of Calcium (Ca) & Magnesium (Mg) is called hard water. It is a characteristic of preventing lather formation of water with soap. Ca2+ & Mg2+ ions react with soaps which are salts of fatty acids (stearic or palmitic acid) to give insoluble scums or precipitates of calcium or magnesium stearate or palmitate. 2C17H35COO- + Ca2+ → (C17H35COO)2 Ca (scum) 2C17H35COO- + Mg2+ → (C17H35COO)2
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desalination of water water‚ desalination of‚ process of removing soluble salts from water to render it suitable for drinking‚ irrigation‚ or industrial uses. The principal methods used for desalination include distillation (or evaporation)‚ electrodialysis‚ freezing‚ ion exchange‚ and reverse osmosis. In distillation saltwater is heated in one container to make the water evaporate‚ leaving the salt behind. The desalinated vapor is then condensed to form water in a separate container. Although long
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AUTOMATIC WATER PUMP CONTROLLER The automatic water pump controller is used to control the water pump motor. The motor gets automatically switched on when water in the overhead tank (OHT) falls below the lower limit. Similarly‚ it gets switched off when the tank is filled up. Built around only one NAND gate IC (CD4011)‚ the circuit is simple‚ compact and economical. It works off a 12V DC power supply and consumes very little power. The circuit can be divided into two parts: controller circuit and
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9/17/2014 The History of Computer Storage from 1938 - 2013 | Zetta.net 1.877.469.3882 Enterprise-grade Cloud Backup and Disaster Recovery PRODUCTS IT INITIATIVES RESOURCES Login CUSTOMERS Blog Contact Us PARTNERS Pricing SEARCH ABOUT US The History of Computer Storage Innovation from 1928 to Today Humankind has always tried to find ways to store information. In today s modern age‚ people have become accustomed to technological terminology‚ such as CD-ROM
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2004‚ water supply was available on average for 18 hours each day in the West Zone of Metro Manila and 21 hours in the East Zone. According to their respective websites‚ the utility responsible for water supply in the East Zone of Metro Manila increased 24-hour water from 26% in 1997 to 98% in 2007‚ whereas in the West Zone‚ 42% of the customers had an uninterrupted supply in 2007. In a 2004 sample of 45 water service providers with different management models and sizes‚ the National Water Resources
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ganguly‚ Chattejee‚ Dey‚2011). Eichhornia crassipes‚ water hyacinth is a lignocellulosic material which is considered as a good source of biomass. water hyacinth is compose of different fiber s: lignin‚ cellulose‚ and hemicelluloses. INTRODUCTION Water lilies also known as water hyacinth are aquatic plants found in countries with
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