The Fibre Optics Technology Engineering Essay Free Essays

string(38) " the optical maser visible radiation\." In the past year the information is fetched on developments, inventions and hereafter is explained in perceptible mode In add-on to the aforesaid benefits, fibre optics overseas telegrams have high electrical opposition, are non affected by electromagnetic Fieldss, secure, and low weight. Even so, short distance communications usually rely on electrical Cu wiring due to its much lower cost, easiness of usage, and ability to transport a current. Other utilizations of fibre optics include medical imagination and as centripetal tools. We will write a custom essay sample on The Fibre Optics Technology Engineering Essay or any similar topic only for you Order Now A The subject about the integrated-optic modulators in high velocity fiber-optic links, operation of devices used to externally modulate light beginnings used with fiber-optic ushers has been explained in a perceptible mode Introduction A fiber-optic communicating system uses the same basic functional constituents as a copper-based communicating system-a sender, receiving system and transmittal medium-except that a fibre-optical nexus ( FOL ) uses optical fiber ( in topographic point of Cu overseas telegram ) as the transmittal medium. Here the optical fiber connects the sender and the receiving system. It carries information in the signifier of light and mainly consists of three parts, viz. , the nucleus, the facing, and the buffer or coating that is used to give strength and protection to the fiber overseas telegram. The nucleus is the cardinal portion of the fiber through which light base on ballss because of the procedure of entire internal contemplation. The cladding surrounds the nucleus, with a different refractile index so that light go throughing through the nucleus stays in that part. The sender consists of an electrical interface, optical modulator and light emitter, and a optical maser rectifying tube or LED for encoding. At the other side, to change over visible radiation into an electrical signal, the receiving system uses either a PIN photodiode or an avalanche photodiode ( APD ) . Several other constituents take portion in set uping an optical fiber nexus ; for illustration, multiplexer, de-multiplexer, signal regenerators, signal repeaters ( or optical amplifiers ) , couplings and splitters. In an optical transmittal system, pick of optical modulators plays an of import portion in the overall public presentation of the system. In this article, we ‘ll concentrate on high-velocity optical modulators, but before we dwell on them in item have a expression at the rudimentss of optical modulators. Optical Modulators Converting information in the signifier of electric signals into light moving ridges is known as optical transition. This sort of transition can be achieved either straight or externally. In direct transition, information in the signifier of electric signals is applied straight to the light beginning. Many links use this sort of technique to cut down complexness of the system, but when informations rates or the length of the nexus additions, ‘on’/’off ‘ velocity restriction of the optical maser generates waveguide chirp and stage transition. This causes amplitude transition deformation at the receiving system side, which is unwanted for high-definition, high-data-rate communicating. In such a state of affairs, a continuously-‘on ‘ optical maser beginning provides a better solution. That is the basic thought of indirect transition or external transition. In direct transition, digital logic province ‘1’/’0 ‘ is applied str aight as ‘on’/’off ‘ electric signal or two different degrees of electromotive force to the light beginning. In these fortunes, factors like clip invariable of the drive circuitry, building of the visible radiation beginning itself and the features of the transmittal medium ( say, optical fibre ) affect the highest frequence at which the visible radiation beginning can run. Using high-velocity layout and microwave design techniques and high velocity short-pulse integrating ; the job with the circuit and transmittal medium can be minimized. But as stated earlier, the major restriction of this technique is exchanging of the visible radiation beginning itself. In a typical optical maser beginning, this shift cause ‘s electrical and thermic emphasis, which consequences in a frequence displacement known as ‘chirp, ‘ transients and decreased life of the light beginning? In external transition, the optical maser rectifying tube itself stays unmod ulated. Data is delivered straight to electrically modulate the crystalline stuff like Li niobate. This device can repeatedly exchange visible radiation without impacting the light beginning. Three types of external modulators are normally used: electro-absorption modulators based on Ga – arsenide ( GaAs ) or indium-phosphate ( InP ) semiconducting material, electro ocular modulators based on polarized polymers, and modulators based on electro ocular crystals like Li niobate and other stuffs. Fig. 2 shows the basic difference between direct and external modulators. Over the period, external modulators based on Li niobate ( LiNbO3 ) have become more popular because of its low optical loss and high electro ocular coefficient. Next is described the working of amplitude and stage modulators, followed by their comparing with semiconducting material modulators based on GaAs ( gallium arsenide ) and InP ( indium phosphate ) . There are two normally used types of optical modulators in fibber ocular communicating systems: the electro soaking up modulator ( EAM ) and the Mach-Zehnder modulator ( MZM ) . Electro Absorption Modulator ( EAM ) EAM is little and can be integrated with the optical maser on the same substrate. An EAM combined with a CW optical maser beginning is known as an electro soaking up modulated optical maser. An EML consist of a CW DFB optical maser followed by an EAM, as shown above. Both devices can be integrated monolithically on the same InP substrate, taking to a compact design and low yoke losingss between the two devices. The EAM consists of an active semiconducting material part sandwiched in between a p- and n-doped bed, organizing a p-n junction. The EAM works on the rule known as Franz-Keldysh consequence, harmonizing to which the effectual set spread of a semiconducting material decreases with increasing electric field. Without bias electromotive force across the p-n junction, the set spread of the active part is merely broad plenty to be crystalline at the wavelength of the optical maser visible radiation. You read "The Fibre Optics Technology Engineering Essay" in category "Essay examples" However, when a sufficiently big contrary prejudice is applied across the p-n junction, the effectual set spread is reduced to the point where the active part begins to absorb the optical maser visible radiation and therefore becomes opaque. In practical EAMs, the active part normally is structured as an MQW, supplying a stronger field-dependent soaking up consequence ( known as the quantum-confined Stark consequence ) . The relationship between the optical end product power, Pout, and the applied contrary electromotive force, Vm, of an EAM is described by the alleged shift curve. The undermentioned figure illustrates such a curve together with the accomplishable ER for a given shift electromotive force, Vsw. The electromotive force for exchanging the modulator from the on province to the off province, the shift electromotive force Vsw, typically is in the scope of 1.5 to 4 V, and the dynamic ER normally is in the scope of 11 to 13 dubnium. Because the electric field in the active part non merely modulates the soaking up features, but besides the refractile index, the EAM produces some chirp. However, this chirp normally is much less than that of a straight modulated optical maser. A little on-state ( prejudice ) electromotive force about 0 to 1 V frequently is applied to minimise the modulator chirp. Lithium Niobate Mach-Zehnder Modulator ( MZ Modulator ) Lithium Niobate Mach-Zehnder modulators are suited for usage in tube, long-haul ( LH ) and extremist long-haul ( ULH ) optical conveyance applications. The incoming optical signal is split every bit and is sent down two different optical waies. After a few centimeters, the two waies recombine, doing the optical moving ridges to interfere with each other. Such an agreement is known as an interferometer. If the stage displacement between the two moving ridges is 0A ° , so the intervention is constructive and the light strength at the end product is high ( on province ) ; if the stage displacement is 180A ° , so the intervention is destructive and the light strength is zero ( off province ) .The stage displacement, and therefore the end product strength, is controlled by altering the hold through one or both of the optical waies by agencies of the electro-optic consequence. This consequence occurs in some stuffs such as Li niobate ( LiNbO3 ) , some semiconducting materials, every bit good as some polymers and causes the refractile index to alter in the presence of an electric field. The guided-wave LiNbO3 interferometers used to modulate optical maser beams was fabricated every bit early as 1980. LiNbO3 has been the stuff of pick for electro-optic MZ modulator because it combines the desirable qualities of high electro-optic coefficient and high optical transparence in the near-infrared wavelength used for telecommunications.LiNbO3 MZ modulator can run satisfactorily over a wavelength scope of 1300 – 1550nm. It has been widely used in today ‘s high-velocity digital fiber communicating. LiNbO3 MZ modulators with stable operation over a broad temperature scope, really low bias-voltage impetus rates, and bias-free operation are commercially available. High-speed, low-chirp modulators are needed to take advantage of the broad bandwidth of optical fibers. Modulators have became a critical constituent both in the high-velocity time-domain-multiplexing ( TDM ) and wavelength-division-multiplexing systems ( WDM ) . Modulators have been traditionally used to modulate a uninterrupted moving ridge ( CW ) optical maser to bring forth the digital signal to be transmitted through a fiber. High-speed modulator with gt ; 40GHz bandwidth has been fabricated. Low drive-voltage operation is the key to brining such modulators into practical usage because this eliminates the demand for high-octane electrical amplifiers. There is general a trade off between the velocity and the thrust electromotive force. The modulator chirp must besides be taken into consideration in the nexus design. The design of the modulator and the associated chirp can be used as a grade of freedom to widen nexus distance. Indium Phosphide Mach Zehnder Modulator with DWDM Laser Figure 1 shows the construction of the n-i-n optical wave guide. The construction consists of n-InP facing, an undoped InGaAlAs/InAlAs MQW ( I »PL = 1.37 I?m ) , an Fe-doped SI-InP bed ( Semi-Insulating InP bed ) , and an n-InP facing laminated in this sequence on an SI-InP substrate. In order to avoid losingss of the electrical signal and the optical signal caused by the p-type semiconducting material bed, both the signal and land electrode beds are made with n-type semiconducting material beds in which the loss is about 1/20 of that in the p-type. Besides, a high dislocation electromotive force feature is assured by infixing an SI-InP bed doped with Fe between the n-type clad bed and the i-MQW optical guiding bed. The SI-InP and i-MQW beds are 1.0 and 0.3 I?m. Since the electric field is applied in the limited part within the SI-InP and i-MQW beds, the efficiency of transition of the refractile index by the electro ocular consequence can be made larger. Therefore, low-tension ope ration and optical transition with a short electrode length can be realized. Fig. 1. Cross-sectional geometry of the n-i-n wave guide In LiNbO3 and III-V semiconducting materials, they are I?33 = 30.8 pm/V ( LiNbO3 modulator ) I?41 a†°? 1.4 pm/V ( InP modulator ) The coefficient in the semiconducting material is about 1/20 that of LiNbO3. However, while the refractile index of LiNbO3 is 2.2, that of the semiconducting material is about 3.2, so that the existent fluctuation of the refractile index in the semiconducting material is 1/7 that of LiNbO3. Therefore, when an optical modulator utilizing the electrooptic consequence is fabricated, the key to size decrease is how the high-density electric field is applied to the optical field. When the constructions of the optical wave guides are compared, the breadth of the n-i-n optical wave guide is A? that in the LiNbO3 modulator and the electrode spacing is from 1/30 to 1/50, so that an electric field more than 100 times as great is applied. Therefore, even with a shorter electrode, fluctuations of the refractile index take topographic point and stage transition can be achieved. To run an optical modulator, an electrode constellation with a distributed component type is effectual, since it is non band-limited by the CR clip changeless. In this manner, a going moving ridge electrode constellation is formed, along which the electrical signal propagates in the same way as the optical moving ridge for optical transition. In order to execute ultra-fast, high-efficiency optical transition with a going moving ridge electrode, two conditions, speed fiting between the optical and electrical moving ridges, and electric resistance matching with a drive system, are of import. a exposure of the bundle for the push-pull constellation Features aˆ? Voltage programmable end product power control aˆ? Long draw public presentation with negligible punishment aˆ? Integral Etalon wavelength stabilization to within A ± 20 autopsy over life aˆ? Differential or individual 50 Ohm low electromotive force thrust transition input aˆ? Integral thermo-electric ice chest with preciseness NTC thermal resistor for temperature control aˆ? Hermetically sealed butterfly manner bundle with SMA RF connections aˆ? ITU Wavelengths available from 1527 nanometer to 1608 nanometer aˆ? 50 GHz channel spacing Parameter Conditions Min Typ Max Unit FIBER OPTIC TECHNOLOGY MICROWAVE AND MILLIMETER WAVE SYSTEMS Side igniter eliminates the dead-zone. Fibre ocular engineering, traditionally used for long draw communications, is happening new applications in short draw communicating systems in military airborne and shipboard platforms. New commercial services such as fibre-to-the-premise for broadband to the concern and place, broadband radio Internet, and digital picture services are being installed across the USA. The service suppliers and installers of these new systems require new methods of proving fibre ocular nexus public presentation in distances from a few metres to less than 1 Km. Optical clip sphere reflect metres ( OTDRs ) traditionally are used for long haul communicating systems but are limited in their usage in military systems and new commercial services due to dead zones. Artisan Laboratories Corporation has developed the Side igniter ( Patent Pending. ) ; a new trial and measuring system eliminates the dead-zone associated with OTDRs therefore doing it attractive for both military and new commercial applications. The Side igniter has a declaration of a few centimeters and is field portable. Radar and Communication System Testing Radar and communicating system trials require out-of-door scopes to find system public presentation. Using an out-of-door scope is expensive and clip devouring so alternate solutions are sought. Radar trials use fixed marks stat mis off from the radio detection and ranging for standardization. Microwave clip holds can be used to imitate marks that allow for proving in a research lab puting. Many bidirectional ( Patent pending ) microwave communicating channel simulator for two manner wireless have been developed the designed demonstrated transmittal at RF and micro-cook frequences that advanced microwave mark allow testing in a research lab environment. Communicationss Fibre ocular transmittal of digital informations for long draw and metro entree is widely used in the telecommunications industry. As new services are being developed and offered, such as PCS, Broadband Wireless Internet, Digital Video, and Passive Optical Networks, new chances for parallel fibre ocular distribution are emerging. The presentation of a DWDM parallel fibre ocular system used to administer PCS and Broadband. Wireless Internet showed that administering RF over fibre up to 3 GHz has the advantage of simplifying the system architecture and cut downing base station complexness. In this presentation, a DWDM broadband photonic conveyance system was able to run into the demands for both IS-95 Personal Communications Services operating at 1.9 GHz and Broadband Wireless Internet operating over the set of 2.5 to 2.7 GHz. Each DWDM channel operates from 1 to 3 GHz and conveyances services up to 80 Km.Artisan Laboratories Corporation presently offers optical transmittal equipment suited for these applications. Spacecraft New developments for the following coevals of communicating orbiters and infinite based radio detection and ranging systems include the application of active phased array aerial. In communicating systems, active phased array aerial offer on-board reconfigurability and multi-beam operation. These characteristics greatly cut down concern hazard by leting the beam form to alter depending on client demands. Fibre ocular distribution has been proposed for the transmittal of microwave signals from the orbiter coach to the phased array aerial. The advantages of utilizing this engineering are higher stage stableness with temperature due to the fibre mechanical to belongingss ; lighter weight and flexibleness of the fiber ; and smaller size of the optical interconnect and optical power splitters. The usage of fiber besides allows for a high degree of integrating with antenna elements therefore cut downing size and weight. Developers are presently developing multi-level microwave photonic facu lties that utilize such integrating. While these new developments show promise, fibre ocular distribution has the disadvantage of high power ingestion compared with inactive webs such as coaxal transmittal lines. The increased demand on power ingestion can do the usage of fiber in ballistic capsule prohibitive. To do fibre ocular signal distribution competitory with other transmittal engineerings, Scientists are presently developing a new type of fibre ocular engineering call Ultra visible radiation Fibre Optic Link that can significantly cut down the premier power ingestion of the distribution system. Satellite Communicationss SATCOM applications make usage of fibre ocular links to have signals from the aerial at a distant location such as a shelter. These links are normally available and operate at an IF of 70 MHz. This architecture requires a low noise amplifier ( LNA ) , frequency interlingual rendition circuitry ( down- convertors ) , local oscillators, filters and a optical maser sender all located at the aerial site. Architecture allows for the transmittal of the RF or micro-cook frequence from the orbiter aerial straight over fiber to an integrated exposure receiving system and down-converter system located at a shelter. This architecture reduces the equipment required at the aerial site to the LNA and optical maser sender. Many research labs are offering a high public presentation Low Noise Optical Transmitter System and Integrated Photo receiver Down-Converter System that directs the signal straight from the aerial to a microwave modem. The Low Noise Optical Transmitter System is connected straight to satellite antenna systems extinguishing the demand for a separate low noise amplifier. The Integrated Photo receiver Down-Converter System is an all- in-one system that detects RF and microwave signals over fiber, amplifies the signals, and down-converts them to an intermediate frequence ( IF ) to interface with commercially available microwave informations modems. This system can observe RF over fiber at transition frequences up to 6 GHz and can change over the transition to an IF of 70 MHz or 140 MHz. In applications in which signals from multiple SATCOM aerial must be combined and distributed, DWDM parallel fibre ocular transmittal can be employed. DWDM sender and receiving system capableness include signal transmittal over 100 Km and bandwidth that exceeds multiple octaves with a CNR of 32 dubnium in the set of 950 to 2150 MHz. light beginnings used with fiber-optic Optical Beginning The basic demands for the visible radiations beginnings used in optical communicating systems depend on the nature of the intended application ( long-haul communicating, local-area web, etc. ) . Both light-emitting rectifying tubes ( LEDs ) and laser rectifying tubes are used as beginnings. Laser rectifying tubes have the advantage of high power ( 10s of mW ) , high velocities, and narrow spectral breadth. LEDs have the advantages of huskiness, dependability, lower cost, long life-time, and simpleness of design. However, they suffer from comparatively broader line breadth and lower bandwidth. If we use external wavelength filters, this may diminish the power coupled. Even at a individual â€Å" colour † ( wavelength ) several manners may be present. Matching to a single-mode fibre will lose the power in these other manners. Therefore the chief characteristics for a light beginning are: 1 ) Power. The beginning power must be sufficiently high so that after transmittal through the fibre the standard signal is noticeable with the needed truth. This includes stableness of that power both in amplitude and frequence. 2 ) Speed. It must be possible to modulate the beginning power at the coveted rate. 3 ) Spectral line breadth. The beginning must hold a narrow spectral line breadth so that the consequence of chromatic scattering in the fibre is minimized. What is the consequence of a finite I†I » ( scattering ) on your system? 4 ) Noise. The beginning must be free of random fluctuations. 5 ) Emission wavelength. Contrast to fiber fading. 6 ) Emission pattern – The beginning power must be coupled to the fibre. Both light end product country and manner distribution in the beam can be of import. Light moving ridges travel in the optical fibre in the signifier of manners, each with a distinguishable spacial distribution, polarisation, extension invariable, group speed, and fading coefficient. Thus the fibre chosen for your system must run into the design ends after consideration of: 1 ) Multi-mode fibre whether step-index, or graded-index. Single-mode fibre. 2 ) Core size 3 ) Core refractile index profile 4 ) Bandwidth and scattering features 5 ) Attenuation dB/km ( including any connections and splicings ) which is a map of cardinal wavelength. Fibers are widely used in light applications. They are used as light ushers in medical and other applications where bright visible radiation demands to be shone on a mark without a clear line-of-sight way. In some edifices, optical fibres are used to route sunshine from the roof to other parts of the edifice ( see non-imaging optics ) . Optical fiber light is besides used for cosmetic applications, including marks, art, and unreal Christmas trees. Swarovski dress shops use optical fibres to light their crystal show windows from many different angles while merely using one light beginning. Optical fiber is an intrinsic portion of the light-transmitting concrete edifice merchandise, LiTraCon. A Frisbee illuminated by fiber optics A fiber-optic Christmas Tree A fiber-optic Christmas Tree Optical fiber is besides used in imaging optics. A consistent package of fibers is used, sometimes along with lenses, for a long, thin imagination device called an endoscope, which is used to see objects through a little hole. Medical endoscopes are used for minimally invasive exploratory or surgical processs ( endoscopy ) . Industrial endoscopes ( see fiberscope or bore range ) are used for inspecting anything difficult to make, such as jet engine insides. An optical fiber doped with certain rare-earth elements such as Er can be used as the addition medium of a optical maser or optical amplifier. Rare-earth doped optical fibres can be used to supply signal elaboration by splicing a short subdivision of doped fiber into a regular ( undoped ) optical fiber line. The doped fiber is optically pumped with a 2nd optical maser wavelength that is coupled into the line in add-on to the signal moving ridge. Both wavelengths of visible radiation are transmitted through the doped fiber, which transfers energy from the 2nd pump wavelength to the signal moving ridge. The procedure that causes the elaboration is stimulated emanation. Optical fibers doped with a wavelength shifter are used to roll up scintillation visible radiation in physics experiments. Optical fiber can be used to provide a low degree of power ( around one W ) to electronics situated in a hard electrical environment. Examples of this are electronics in high-octane aerial elements and measuring devices used in high electromotive force transmittal equipment. Optical fibers are besides used in fibre ocular gyroscopes, and other interferometers instruments. Principle of operation An optical fiber is a cylindrical insulator wave guide that transmits light along its axis, by the procedure of entire internal contemplation. The fibre consists of a nucleus surrounded by a facing bed. To restrict the optical signal in the nucleus, the refractile index of the nucleus must be greater than that of the facing. The boundary between the nucleus and facing may either be disconnected, in step-index fiber, or gradual, in graded-index fiber. Multimode fiber The extension of visible radiation through a multi-mode optical fiber. Fiber with big ( greater than 10A I?m ) core diameter may be analyzed by geometric optics. Such fiber is called multimode fiber, from the electromagnetic analysis ( see below ) . In a step-index multimode fiber, beams of visible radiation are guided along the fiber nucleus by entire internal contemplation. Rays that run into the core-cladding boundary at a high angle ( measured relation to a line normal to the boundary ) , greater than the critical angle for this boundary, are wholly reflected. The critical angle ( minimal angle for entire internal contemplation ) is determined by the difference in index of refraction between the nucleus and facing stuffs. Beams that meet the boundary at a low angle are refracted from the nucleus into the facing, and do non convey visible radiation and hence information along the fiber. The critical angle determines the credence angle of the fiber, frequently reported as a numerical aperture. A high numerical aperture allows visible radiation to prop agate down the fibre in beams both close to the axis and at assorted angles, leting efficient yoke of visible radiation into the fiber. However, this high numerical aperture increases the sum of scattering as beams at different angles have different way lengths and hence take different times to track the fiber. A low numerical aperture may hence be desirable. A typical single-mode optical fiber, demoing diameters of the constituent beds. Optical fiber types. In graded-index fibre, the index of refraction in the nucleus decreases continuously between the axis and the facing. This causes light beams to flex swimmingly as they approach the facing, instead than reflecting suddenly from the core-cladding boundary. The ensuing curving waies cut down multi-path scattering because high angle beams pass more through the lower-index fringe of the nucleus, instead than the high-index centre. The index profile is chosen to minimise the difference in axial extension velocities of the assorted beams in the fiber. This ideal index profile is really near to a parabolic relationship between the index and the distance from the axis. Single manner fiber Fibre with a nucleus diameter less than approximately 10 times the wavelength of the propagating visible radiation can non be modelled utilizing geometric optics. Alternatively, it must be analyzed as an electromagnetic construction, by solution of Maxwell ‘s equations as reduced to the electromagnetic moving ridge equation. The electromagnetic analysis may besides be required to understand behaviors such as spot that occur when coherent visible radiation propagates in multi-mode fiber. As an optical wave guide, the fiber supports one or more confined transverse manners by which visible radiation can propagate along the fiber. Fibre back uping merely one manner is called single-mode or mono-mode fiber. The behavior of larger-core multimode fiber can besides be modelled utilizing the moving ridge equation, which shows that such fibre supports more than one manner of extension ( hence the name ) . The consequences of such modeling of multi-mode fiber about agree with the anticipa tions of geometric optics, if the fiber nucleus is big plenty to back up more than a few manners. The wave guide analysis shows that the light energy in the fiber is non wholly confined in the nucleus. Alternatively, particularly in single-mode fibers, a important fraction of the energy in the edge manner travels in the facing as an evanescent moving ridge. The most common type of single-mode fiber has a nucleus diameter of 8 to 10 I?m and is designed for usage in the close infrared. The manner construction depends on the wavelength of the visible radiation used, so that this fibre really supports a little figure of extra manners at seeable wavelengths. Multi-mode fiber, by comparing, is manufactured with nucleus diameters every bit little as 50 micrometres and every bit big as 100s of micrometres. Special-purpose fiber Some special-purpose optical fiber is constructed with a non-cylindrical nucleus and/or cladding bed, normally with an egg-shaped or rectangular cross-section. These include polarization-maintaining fiber and fiber designed to stamp down whispering gallery manner extension. Photonic crystal fiber is made with a regular form of index fluctuation ( frequently in the signifier of cylindrical holes that run along the length of the fibre ) . Such fibre utilizations diffraction effects alternatively of or in add-on to entire internal contemplation, to restrict visible radiation to the fiber ‘s nucleus. The belongingss of the fiber can be tailored to a broad assortment of applications. How to cite The Fibre Optics Technology Engineering Essay, Essay examples

Egypt

Egypt-Ancient Art Essay Egypt Egyptians believed they were once two lands upper and lower Egypt Upper and lower Egypt were unified as a single nation Cairo became their new capital Rulers claiming to be gods, not intermediaries but rather actual gods, believed in gods above the pharaoh Hieroglyphs are a form of pictograms The writing is a group of images, interesting relationship between the art and the written language The division between art and written language is blurred here Concept of afterlife, after we die, we go somewhere Fundamental to the Egyptians Tombs-  would dig a pit, throw the body in it, bacteria cannot grow, example of  Ginger If there was something you treasured in your life, people would imagine that they would want to take it with them to the afterlife As a result ancient Egyptians started to build more complex tombs, (however now since the bodies are not the in hot sand the bodies will begin to decompose) The Pyramids-At Giza (the three pyramids)-Egypt was rich in resources (artists have lots of materials)-the pyramids (of GIZA) were built out of stone, because they wanted them to last forever-the tombs were built while they were alive-Pyramid of Khufu (480 feet tall), solid stone quarried right at the site, were originally encased in white limestone, blocks are 17 ft thick,: we are not sure how the pyramid was built maybe a series of ramps, (that were spiraling around the pyramid) slaves used in the quarries, labour took place on the pyramids during the flood season because farmers could not work in the fields three burial chambers, the bottom was a decoy chamber there were air shafts (for the kings spirit to come and go) the kings are all supposed to be sons of Ra (the sun god) Each pyramid had a pair of temples that was associated with it The kings also had back up bodies Khafre (meaning to look like Ra) statues were portrayed as godly and kingly, sitting on a throne, there were hieroglyphs with symbols of upper and lower egypt, implying that he rules both and will continue to do so in the afterlife Headdress, fake beard (status of the king) There is a hawk, cradling and protecting the statue of the king, the hawk was a representation of the god Horus (son of Ra) Pyramid of Menkaure:-was smaller than the others-husband and wife tomb (they presumable loved each other while they were alive) -statue of the king and the queen, they are both taking steps, the king is taking a farther step forward, the queen is taking more a dainty step-the king and the queen are divine they are gods-the kings hands are clasped in fists around something- the queen is wearing some kind of garment-the queen is wearing a wig, (Egyptians had headlice, so they kept their hair short and wore wigs when they wanted to dress up)Artists used a grid   to create proportions-Tomb of Te, not a god, member of the elite,-Reliefs depict life on the nile, hes hunting hippos, hierarchic structure much larger than everyone else in the relief (his servants), hippo hunting was a royal sport-Sprit was supposed to go into the relief-Te was in composite view while his servants were not indicating his status-reliefs showing servants working on te’s estate-through art show the production of food and drink, art is magic and therefore will allow these things be available to you  (this is why the reliefs were placed in the tomb), if Te enjoyed hunting he puts a piece of art depicting that so that he can enjoy it in the after life

China Essays (489 words) - Republics, China, Taiwan,

China China takes 25% of the earth's population; 1,210,004,956. Chinese people are permitted to chose what they grow on their small plots, to set their own prices and to pocket their profits without paying any taxes. Free Markets, is a big world in China: it refers to designated areas in the city where farmers are allowed to sell their products directly to city consumers. The government is no longer involved in growing, distribution or price setting. The system operates on supply and demand in private marketplace. Chinese people eat, dress, look better. China has the worlds biggest population, it has a fast economy. Dum Champagne, is a Chinese millionaire. Champagne started his business by 200 US dollars, he started a womans clothes shop. He bought a used sewing machine. Clothes only came in certain colors like blue, gray, white and green, but Champagne changed all this. Women liked the colorful, stylish type of clothes he made. This great investment took thinking, and risk. He also added a restaurant he was also afraid he could fail. Champagne graduated in the class of 1966 which was called the "Old Pre Class." Through 1966-19968 this young adults and younger children were sent to the other side of the country. They were left at the country side with no food. Farmers had limited land, and they only provided for so many people and if you went there you were only added to their barden. Young Chinese worked with peasants . The Chinese labor force is estimated at more that 527 million people. Unemployment and underemployment have caused labor productivity and income to de depressed, problems direcly linked to the large size and rapid growth rate of the population. In the early 1980's about one third of the population was 15 years of age or younger; this guarantees that a large number of young people will enter the labor force each year. Although about 60 percent of the labor force consists of agricultural workers, the government's job allocation program does not include rural areas, and here new labor has to be absorbed by the collective and the individual household economy. The rural family is estimated to receive three-quarters of the income from the collective economy and the remainder from sideline activities. According to the constitution of 1982, China is socialist dictatorship of the proletariat led by the Communist party and based on a united front that includes other democratic parties. In practice, The Communist party fully demonstrates national political activity. The Chinese Communist party has more than 52 million members and is the world's largest Communist party. The party held its first National Party Congress in 1921, when it had only 57 members. China has had an organized government since the establishment of the Shang Dynasty about 1726 BC, making it the one of the oldest nations on earth. Chinese people have economic freedom- economic destinies, The government used to control everything. It controlled what they bough, read, where they lived. Technology has also played a big roll in China. Computers is helping their economic power. China is a big country that keeps growing while people work.

Ritalin essays

Ritalin essays Ritalin (Methylphenidate) is a mild CNS stimulant. In medicine, Ritalin's primary use is treatment of Attention DeficitHyperactive Disorder (ADHD). The mode of action in humans is not completely understood, but Ritalin presumably activates the arousal system of the brain stem and the cortex to produce its stimulant effect. Recently, the frequency of diagnosis for ADHD has increased dramatically. More children and an increasing number of adults are being diagnosed with ADHD. According to the Drug Enforcement Agency (DEA) (Bailey 1995), prescriptions for Ritalin have increased more than 600% in the past five years. Ritalin has a long history of controversy regarding side effects and potential for abuse, however it greatly Ritalin (Methylphenidate) is manufactured by CIBA-Geigy Corporation. It is supplied in 5 mg., 10 mg., and 20 mg. tablets, and in a sustained release form, Ritalin SR, in 20 mg. tablets. It is readily water soluble and is intended for oral use. It is a Schedule II Controlled Substance under both the Federal and Vermont Controlled Substance Acts. Ritalin is primarily used in the treatment of Attention Deficit/Hyperactive Disorder (ADHD) (Bailey 1995). ADHD is a condition most likely based in an inefficiency and inadequacy of Dopamine and Norepinephrine hormone availability, typically occurring when a person with ADHD tries to concentrate. Ritalin improves the efficiency of the hormones Dopamine and Norepinephrine, increasing the resources for memory, focus, concentration and attention (Clark 1996). Ritalin has been used for more than 30 years to treat ADHD. Nervousness and insomnia are the most common adverse reactions reported, but are usually controlled by reducing dosage or omitting the afternoon or evening dose. Decreased appetite is also common but usually transient (Long 1996). According to Clark (1996), children, adolescents and adults diagnosed with A...

The Scientificamerican.com Website - Valuable Resource Guide for Essay

The Scientificamerican.com Website - Valuable Resource Guide for Students - Essay Example Why is scientificamerican.com that popular? Simply because it never fails to inform the readers about the latest developments in Science and Technology. Although anybody can easily understand the articles presented in the website, students benefit most from the issues because they constantly need a good supply of updates for their subjects. The website continues the tradition of providing ground-breaking news written by the experts on the subject itself. At first glance, the website seems very simple because the layout is minimal. There are only 2 advertisements present – on top of the main header and on a box on the rights side of the page. This type of design provides more space for readers to access more information. Also, this reveals that the website is well-funded since it does not need too many sponsors as compared to other websites. The white background makes it very easy to read the articles presented as well as see the other sections of the website. There are only si x tabs on the header which can already lead the user to various links that interest him. Also, it is a good way of categorizing issues such as Evolution, Health, Mind and Brain, Technology etc. The dropdown tabs further reveal subdivision of the main topic so the reader can get more specific articles. The middle section contains the Latest Headlines which is a collection of news from various news agencies like Nature, Reuters etc. Nevertheless, the daily articles are enough to catch the interests of the reading public who can also post comments on such topics. The main goal of the website is not just timely delivery of information, it wants to present to the audience emerging trends which is the tradition of the magazine. For example, its very recent article about diabetes blood vessel damage presents a study published only last January 28 in the reputable Journal of Biological Chemistry. If a reader traces the journal, he would be presented with an abstract of the study which is re ally very technical.

Analysis of Debates Research Paper Example | Topics and Well Written Essays - 1000 words

Analysis of Debates - Research Paper Example Society never ceases to look down upon any person taking these plunges or walking those extra miles. These people are always watched from bay with half-squinted eyes. Nevertheless, far beyond confronting the frowning brows of the people gazing around, it is very important to listen to the call of one’s heart (Streitmatter 1-23). Since time immemorial, it has been an established fact that the union of opposite sexes is very important for the progression of any particular race. However, human mind has unfathomable depth and dark channels and abbeys where light of any logic or comprehension is very difficult to reach. A man might feel a physical affinity with a man, and a woman can also have the same kind of affection for another woman against the general convention prevalent in the society. If we examine the scriptures, literature and folklore thoroughly, it can be identified that mankind’s affinity towards the same sex has evolved steadily but in a very latent way. With the progress of civilization and so much of awareness of the importance of civil rights and human psychology, the time has come when people have chosen to discuss the issue at an open and broad forum where the marriages between the same-sex can be advocated and discussed without any kind of suppression. Thesis Statement This essay intends to analyze the thought that gay marriages should be accepted as a commonplace affair of the society. At the same time, the essay throws light on the myriad pros and cons associated with the legitimate ways of attaining the unification of two people belonging to the same sex. Gay Marriages and Its Sanctity Same-sex marriages are often coined in the local terminology as ‘gay marriages’. Etymologically, it is a legitimate union between two persons of the same biological sex. The supporters or the promoters of the gay marriages tend to refer to the same-sex marriages as marriage equality or equal marriage. Turning the pages of the history related to the legitimation of the same-sex marriages, we can observe that it is only very recent, i.e. during the first decade of the twenty-first century, that same-sex marriages were recognized, enacted and protected from the various legal cells across the world. The other noteworthy fact regarding the sanctification of the same-sex marriages took place in the very recent times, i.e. in the year 2013 itself. During the current calendar year, eleven countries across the globe and a few sub-national jurisdictions have allowed the legitimate union between couples of the same sex (Pratt). The complex question which is raised in the most recent times in different societies across the globe is that why there is a complete absence of legal sanctity and universal right pertaining to the gay marriages uniformly across the globe. The Western world is still a step ahead in this regard, and if focus is shifted towards the East and the oriental societies, the condition is pathetic, to say the least. In the current scenario, there are places where even the thought of marrying a person of the same gender can mercilessly take away one’s life. Clergy and church are also not behind any regulatory and theological bodies related to the condemnation of marriage of equality (Mulholland). For example, if a thorough light is shed on the article by Chrysovalantis P. Kefalas, it can be arguably asserted that marriage of equal

An analysis of sex tourism: Issues and critique

An analysis of sex tourism: Issues and critique Introduction Leisure and tourism is considered as one way of getting away daily routines. Numerous tourists feel bored and tired of their everyday life so they travel to escape those environments. Their jobs and duties have become a hindrance to joyful feelings in life. Tourism is not merely an economic activity, but it is not all of the host culture, elements of culture and cultural guest that comes and accepts that culture. ÃŽâ„¢n the Tourism Industry, a dark sector raises called Sex Tourism. Martin (1998) state that, look back to the history the first signs of sex tourism began to appear on first and second World Wars through of the soldiers who needs a place to relax and recreate after a long walk and trajectories in camps. When the military started developing into seas, such as trade trips, the cities changed into busy roads with places of entertainment for sailors and dealers. Sex tourism is a constantly developing phenomenon which defined as â€Å"trips organized from within the tourism sector, or from outside this sector but using its structures and networks, with the primary purpose of effecting a commercial sexual relationship by the tourist with residents at the destination (World Tourism Organization). Sex tourism also furthers gender inequalities and promotes violence towards women. There are two forms of sex tourism: 1) Sex tourism â€Å"promoted† by those countries in which prostitution is legally recognized and considered as a professional activity; 2) Sex tourism taking place in states that are often considered as developing countries, where prostitution is not regulated by a specific law, but by an illegal system. This particular type of tourism has both social and cultural effects on the countries of origin and destination, particularly in those situations in which differences related to sex, age, social and economic status of the populations living in such countries are exploited. The diversity of modern activities is causing impacts on the cultural environment: a common example is the use of cultural as a trade good for the tourism industry. The host community is generally the weak part of the relationship host-guest: taking any influence from the guest side in order to fulfill is requirements (unep 2015). The impacts arise when changes in the cultural v Globalization in the field of economic, cultural, social and political, have a positive relationship and in the field of the environment but a negative relationship with the development of tourism. Tourism can cause change or loss of local identity and values, as well as can convert local cultures into commodities. Tourism can cause change / loss of local identity and values by: COMMODIFICATION STANDARDISATION LOSS OF AUTHENTICITY / STAGED AUTHENTICITY Commodification Tourism can turn local cultures into commodities when religious rituals, traditional ethnic rites and festivals are reduced and sanitized to conform to tourist expectations, resulting in what has been called reconstructed ethnicity (unep 2015). Once a destination is sold as a tourism product, and the tourism demand for souvenirs, arts, entertainment and other commodities begins to exert influence, basic changes in human values may occur. Standardization Destinations risk standardization in the process of satisfying tourists desires for familiar facilities. While landscape, accommodation, food and drinks, etc., must meet the tourists desire for the new and unfamiliar, they must at the same time not be too new or strange because few tourists are actually looking for completely new things. Furthermore, tourists often look for recognizable facilities in an unfamiliar environment, like well-known fast-food restaurants and hotel chains. Loss of authenticity and staged authenticity Adapting cultural expressions to the tastes of tourists or even performing shows as if they were real life constitutes staged authenticity. As long as tourists just want a glimpse of the local atmosphere, a quick glance at local life, without any knowledge or even interest, staging will be inevitable. Cultural clashes: Cultural clashes, promoted through of convergence of cultural, and can arise from economic inequality which based on consumption patterns and local community. The result can be an overexploitation of the social carrying capacity (limits of acceptable change in the social system inside or around the destination) and cultural carrying capacity (limits of acceptable change in the culture of the host population) of the local community (unep 2015). Economic inequality Like all transactions, sex-tourism is both an economic and political phenomenon, this because it must have a market and the transactions must be considered indirectly or directly socially and politically legitimate (Outshoorn 2004 p 267). Many tourists come from societies with different consumption patterns and lifestyles than what is current at the destination, seeking pleasure, spending large amounts of money. Especially in less developed countries, there is likely to be a growing distinction between the haves and have-nots, which may increase social and sometimes ethnic, tensions (unep 2015). Ethical issues Finally, ethical issues are also the aspects as crime generation, the practice of child labour and prostitution. With the growth, urbanization of an area, and growth of mass tourism is often the main reason that crime rates typically increase. Furthermore The presence of a large number of tourists with a lot of money to spend, and often carrying valuables such as cameras and jewelry, increases the attraction for criminals and brings with it activities like robbery and drug dealing. Job level friction In developing countries especially, many jobs occupied by local people in the tourist industry are at a lower level, such as housemaids, waiters, gardeners and other practical work, while higher-paying and more prestigious managerial jobs go to foreigners or urbanized nationals. Due to a lack of professional training, as well as to the influence of hotel or restaurant chains at the destination, people with the know-how needed to perform higher level jobs are often attracted from other countries. This may cause friction and irritation and increases the gap between the cultures. Child labour The United Nations has defined child sex tourism as tourism organized with the primary purpose of facilitating the effecting of a commercial sexual relationship with a child. For children from families too poor to send them to school, tourism can present opportunities to earn an income. In many destinations, this is a stark example of how the supposed wealth generated by tourism is not being equally shared across society. It can also leave children open to one the most abhorrent forms of exploitation such as child sex tourism. Every year, countless numbers of children are sexually abused by tourists. Child sex tourism is the commercial sexual exploitation of children in tourism. Despite concerted international efforts to combat child sex tourism, it is an increasing phenomenon. Factors such as internet, low cost travel, border relaxations and visa free travel are making it more challenging to monitor and prevent. Prostitution and sex tourism Though tourism is not the cause of sexual exploitation, it provides easy access to it. The lure of this easy money has caused many young people, including children, to trade their bodies in exchange for some money and many times for some material goods such as clothes and food. In other situations children are trafficked into the brothels on the margins of the tourist areas and sold into sex slavery, very rarely earning enough money to escape. Certain tourism destinations have become centers for this illegal trade, frequented by pedophiles and supported by networks of pimps, taxi drivers, hotel staff, brothel owners, entertainment establishments, and tour operators who organize package sex tours. Philippines Philippines has become one of the most popular destination with 40 percent of the visitors are sex tourists. The last years while the Philippines economy has made a big progress, a quarter of the population still lives below the international poverty line of US$1.25 per day. Today Philippines has over 300 bars clubs that offer sexual liaisons. An alarmingly problem to the country is that the fathers often don’t take responsibility of the child with result the mothers to can’t take care of the child because of economic issues. This kind of social circumstance usual force the children too in prostitution, with many of them facing such ordeals at an incredibly young age with result to trap the young generation in the sex industry. Moreover, must to be note that $400m spent on prostitution each year in Philippines. There are 500k workers which almost a fifth of whom are minors. Owners of sex bars in the Philippines often use fake identification documents in order to employ minors. Some former child victims have reported being offered jobs as waitresses in â€Å"red light† districts and then being coerced into providing sexual services to customers. Prostitution of children in the Philippines is in some cases associated with domestic work. It has been estimated that in Manila alone there are 1.5 million street children with result to increase the vulnerability of children to all forms of commercial sexual exploitation of children, in particular, child prostitution, pornography and trafficking for sexual purposes. John Hopkins University state that the number of minors exploited in the commercial sex industry in the Philippines is between 60,000 and 75,000. Trafficking of children According to the US Department of State, the Philippines are mostly a source country, and to a lesser extent a transit and destination country for children subjected to sex trafficking. Domestic child trafficking in the Philippines presents more challenges than cross border trafficking. Internally, women and children are trafficked from poor farming communities and rural areas to urban areas such as Manila, Angeles City and Cebu City. Men are subjected to forced labor and debt bondage in agriculture, including on sugar cane plantations, and in the fishing industry. Women and children were trafficked within the country for forced labor as domestic workers and small-scale factory workers, for forced begging, and for exploitation in the commercial sex trade. Hundreds of victims are subjected to sex trafficking each day in well-known and highly visible business establishments that cater to Filipinos’ and foreign tourists’ demand for commercial sex acts. Filipino migrant workers, both domestically and abroad, who became trafficking victims are often subjected to violence, threats, inhumane living conditions, nonpayment of salaries, confinement, and withholding of travel and identity documents. Traffickers, at times in partnership with organized crime syndicates and corrupt government officials, recruit family and friends from villages and urban neighborhoods, sometimes masquerading as representatives of government-registered employment agencies. Apart from poverty, the main causes of child trafficking in the Philippines are low economic development in communities of origin, gender inequalities, limited employment opportunities, large family sizes, inadequate awareness among families, and sex tourism. Also persistent law enforcement officials’ complicity in human trafficking and corruption at all levels of government enables traffickers to prosper and exploit children in the sex industry Trends The last years in Philippines has emerged a new form of online child exploitation which seems to have devastating effects. The people who promote child sex tourism in Philippines usually offer money or other rewards to the victims in order to promote direct live streaming videos of children. Since there is no direct sexual contact, often parents see it not as a problem but the damage which webcam sex make to the children in fact is large. Legislation and mechanisms to protect children from sexual exploitation In 2004, the Interà ¢Ã¢â€š ¬Ã‚ Agency Council Against Trafficking in Persons (ACT), in collaboration with other government agencies, NGOs and other stakeholders, created a six year (2004-2010) Strategic National Plan of Action against Trafficking. This specific plan is split into three components: Prevention protection, including law enforcement and prosecution repatriation, recovery and reintegration In relation to the prevention of trafficking, relevant objectives of the plan include: 1) Increasing public awareness of trafficking 2) Undertaking research on the root causes of trafficking in women and children 3) Instituting programs at the local level to prevent women and children from being procured by traffickers. Conclusion and recommendation Many question the Filipino Government’s lack of involvement in reducing the accessibility of the sex trafficking and sex tourism industry. Currently, the punishment stands at a  £12 fine for the bar or club where the girl is taken from to have sex. Furthermore, being a deeply religious country, access to contraception isn’t widely available and therefore increases the chances of pregnancy among the women. In conclusion, we have seen that the existence of child sex tourism in the Philippines is directly related to the inequalities in wealth that are present between the developing and developed world. Additional factors include the historical context of foreigners in the islands and the images and stereotypes of Orient sexuality. The way forward must include all actors shows as local people, governments and the tourism industry. However these do not necessarily have the opportunity or motivation to act. Therefore there is a crucial campaigning role to be played by civil society and, in particular, the media. Philippines must to realize that their image such as tourism destination has been damaged by the negative publicity for child sex tourism in order to take drastic measures. the UN refer that Decriminalization enables sex workers to organize within their communities and register their organizations, obtain identification documents so that they can fully access services and entitlements, engage in advocacy and respond to the health and safety needs of their peers. By legalizing prostitution, a government can help bring sex workers under labor protections offered to other workers. Some claim that prostitution in inherently unsafe and so should not be sanctioned by labor laws, but many other industries are unsafe such as the mining industry, and this was precisely the reason why government labor laws and unions were created to protect them. Moreover, a legalized form of prostitution will help lessen the incidence of human trafficking through of the rules which will be applied with result to reduce sex trafficking and take out prostitution of the black market. Legalization won’t cure all of the buses involved in the sex industry. But, if it will make the environment marginally safer, which is an appropriate step in the right direction. In other words, legitimizing prostitution in the Philippines will pave way to equal treatment to sex workers. Reference: Martin Oppermann (1998). Sex Tourism and Prostitution: Aspects of Leisure, Recreation, and Work (Tourism Dynamics). Edition. Cognizant Communication Corp Outshoorn, Joyce (e.d), 2004. Politics of Prostitution: Womens movment, Democratic states and the Globalisation of sex commerce, Cambridge: Cambridge University Press. UNEP, (2015). United Nations Environment Programme: environment for development. [ONLINE] [Accessed 29 April 2015]. Available at: http://www.unep.org/resourceefficiency/Business/SectoralActivities/Tourism/FactsandFiguresaboutTourism/ImpactsofTourism/Socio-CulturalImpacts/NegativeSocio-CulturalImpactsFromTourism/tabid/78781/Default.aspx. The Lost Generation Sex Tourism in the Philippines. The Global Panorama. 2015. [ONLINE] [Accessed 29 April 2015]. Available at: http://theglobalpanorama.com/the-philippines-generation-of-sex-tourism-children/. ECPAT Website http://www.ecpat.net/ Trinidad, A.C., University of the Philippines, and UNICEF Manilla. (2005). Child pornography in the Philippines. Psychosocial Trauma and Human Rights Program, UP Center for Integrative and Development Studies and UNICEF Manila. USA department of state, DIPLOMACY IN ACTION case Philippines, (2015). [ONLINE] [Accessed 29 April 2015]. Available at: http://www.state.gov/j/tip/rls/tiprpt/countries/2013/215544.htm. TRAVEL Health Clinic: sex tourism. WLV Article Linker Results (2015). [ONLINE] [Accessed 29 April 2015]. Available at: http://wk6kg9sd8m.search.serialssolutions.com/?ctx_ver=Z39.88-2004ctx_enc=info%3Aofi%2Fenc%3AUTF-8rfr_id=info:sid/summon.serialssolutions.comrft_val_fmt=info:ofi/fmt:kev:mtx:journalrft.genre=articlerft.atitle=Sex+tourismrft.jtitle=Practice+Nursingrft.au=Willcox%2C+Adriennerft.date=2009-05-01rft.issn=0964-9271rft.volume=20rft.issue=5rft.spage=251rft.epage=255rft.externalDBID=n%2Farft.externalDocID=10_12968_pnur_2009_20_5_41986paramdict=en-US Exploitation of children (2015). [ONLINE] [Accessed 29 April 2015]. Available at: http://tourismconcern.org.uk/exploitation-of-children/. SEX TOURISM AS ONE FACTOR OF TOURISM INDUSTRY (2015) [ONLINE], Available at: http://www.academia.edu/4067691/SEX_TOURISM_AS_ONE_FACTOR_OF_TOURISM_INDUSTRY Sex tourism, (2015). [ONLINE] [Accessed 29 April 2015]. Available at: http://www.osservatoriopedofilia.gov.it/dpo/en/turismo_sessuale.wp;jsessionid=1E5E9596040D117D8397640725FC2AEF.dpo1. Schuster Institute Investigative Journalism (2015). [ONLINE] [Accessed 29 April 2015]. Available at: http://www.schusterinstituteinvestigations.org/#!human-trafficking-boston-to-bangkok-3/c4jy. Who is to blame for sex tourism. Al Jazeera English, (2015). Who is to blame for sex tourism? Al Jazeera English. [ONLINE] [Accessed 29 April 2015]. Available at: http://www.aljazeera.com/programmes/insidestory/2011/10/201110992858495767.html. Michael, S. Elsa, J. Eike, A. (2004). Implementing Strategic Environmental Assessment (Environmental Protection in the European Union). 2 end vol 2 . Springer.