Reversible Photochromism: Effects and Applications

Reversible Photochromism: Effects and Applications 1. Introduction In this report I will be looking at the smart material property known as Reversible Photochromism. This property contains a range of chemicals that react to UV light. This report will explore a range of the effects of the compound, which will include a review of the applications of this property and the process that make them possible, by exploring the, Ring Process, method. This report will also include looking at general applications where Reversible Photochromism technology is being used and any future concepts, such as, smart materials/technology involving textiles, dyes and inks. Including existing products, such as, transition lenses, and how that technology can be used for greater achievements. 2. What is Photochromism? Photochromism is the reversible alteration of a chemical variety between two forms by the absorption of electromagnetic radiation, where the two forms have different absorption spectrum. This can be described as a reversible change of colour upon exposure to light. Where the current substance transforms into a different colour once exposed to UV light. Once the UV light is removed, the substance under goes a transformation into its original state. Interest in Photochromism was constant but limited until the 1940-1960 periods, which saw an increase of studies, particularly in the research groups of Hirshberg and Fischer in Israel. In 1950, Hirshberg suggested the term photochromism [from the Greek words: phos (light) and chroma (colour)] to describe the phenomenon. This is the name used today. The mechanism for Photochromism in plastic crystalline materials is shown below. (Closed Form) (Open Form) Photochromic colours/dyes are plastisol-based inks, which are off-white when not exposed to UV radiation. It gains colour when exposed to Sun light / UV light. The colour change is reversible, i.e., the colour will fade again and appear colour less or clear upon removal from UV light / sun light exposure. These inks are available in various colours; ranging from dark tones to bright pink. 3. How  are Photochromic Lenses Made? There is a vast range of different states Photochromism can be manipulated into. All of these states have extra compounds and particles. The most common Photochromic state is glass lenses. Photochromic lenses are lenses that darken on exposure to ultraviolet (UV) radiation. Once the UV is removed, for example by walking indoors, the lenses will slowly return to their clear state. Photochromic lenses may be made of glass, polycarbonate, or another plastic. The glass version of this type of lenses was first developed by Corning in the 1960s. More recently, plastic versions of these lenses have been commercialised. The first of these was the Photolite lens sold in the early 1980s. But the first commercially successful plastic Photochromic lens was introduced by Transitions Optical in 1991. The glass version of these lenses achieve their Photochromic properties through the embedding of microcrystalline silver halides (usually silver chloride), or molecules in a glass substrate. Plastic Photochromic lenses rely on organic Photochromic molecules to achieve the reversible darkening effect. The reason these lenses darken in sunlight but not indoors under artificial light, is that room light does not contain the UV found in sunlight. Transport windows also block UV so these lenses would darken less in a car. Lenses that darken in response to visible (rather than UV) light would avoid these issues, but they are not feasible for most applications. In order to respond to light, it is necessary to absorb it, thus the glass could not be made to be clear in its low-light state. This correctly implies Photochromic lenses are not entirely transparent; specifically they filter out UV light. This does not represent a problem, because the human eye does not see in the UV spectrum. With the Photochromic material dispersed in the glass substrate, the degree of darkening depends on the thickness of glass, which poses problems with variable-thickness lenses in prescription glasses. With plastic lenses, the material is normally embedded into the surface layer of the plastic. Typically, Photochromic lenses darken substantially in response to UV light in less than one minute, and then continue to darken very slightly. This can take 15 minutes. The lenses fade back to clear along a similar pattern. The lenses will begin to clear as soon as they are away from UV light, and will be noticeably lighter much quicker than the darkening process. However, it can take up to more than 20 minutes for the lenses to completely fade to their non-exposed state. Because Photochromic compounds fade back to their clear state by a thermal process, the higher the temperature, the less dark Photochromic lenses will be. This thermal effect is called temperature dependency and prevents these devices from achieving true sunglass darkness in very hot weather. In contrast, Photochromic lenses will get very dark in cold weather conditions; which makes them more suitable for snow skiers than sun worshippers while outside. Once inside, away from the triggering UV light, the cold lenses take longer to regain their clear colour than warm lenses. 4. The Chemical Compounds of Reversible Photochromism Photochromism can be manipulated into different states, liquids; gels, dyes and water like substance, and solids; thin plastic like films and pigment powders. The most common form of Photochromism is liquid dye. This dye is a clear substance that can be penetrated and manipulated into different forms. Dyes reversibly alter their colour upon exposure to ultraviolet sources. These chameleon-like dyes respond to natural solar irradiation as well as artificial sources such as 365 nanometer black light. When sunlight or ultraviolet (UV) radiation is applied, the Photochromic dye becomes excited and the molecular structure is changed allowing a colour to appear. When the stimulus (sunlight/UV radiation) is removed, the dye will return to a state of rest, which is its colourless form. Photochromic molecules are not reactive in their crystalline state and need to be dissolved in a solvent or polymer to function. A common feature of the Photochromic is a colourless isomer that contains a carbon-oxygen bond which dissociates with UV activation. The colourless isomer contains two localized pi systems that absorb only in the UV part of the spectrum. Hence, the molecule appears colourless. After the carbon-oxygen bond dissociates, the two pi systems change into a single delocalised pi system which absorbs in the visible part of the spectrum, causing colour formulation. The life of Photochromic material depends on the amount of Photochromic compound used, the stabilisers used and the material in which it is used. Generally, it is suggested that 0.1 gram per square foot be used to provide an adequate reservoir of Photochromic compound. The use of ultraviolet absorbers will also extend the life of the Photochromic, but will reduce the colour intensity. There are effectively two changes occurring simultaneously; a chemical change arises when the molecule is exposed to UV light that enables conjugation to take place throughout the molecule; a structural change also occurs to enable the overlap of molecules. Therefore, spatially, the molecules must be able to flatten out to allow this conjugation to take place. It is a fully reversible reaction so that when the light source is removed, the molecule returns to its uncoloured state. Heat can also help drive the reaction back to the uncoloured form, so in very hot conditions, there is always competition between light and heat to determine the given colour observed. In general, a colour change is still observed, albeit weaker than at room temperature. Similarly, in cold conditions in the presence of sunlight, an intense colour is observed as there is little or no competition from the back reaction. Such dyes incorporated within a sol-gel matrix can have several practical applications, such as optical switches (if the reversal is very fast) and optical storage for computer memory (if the reverse colour change is not possible at room temperature). Sol-gel Materials mixed with Photochromic dyes have also been investigated as fibre optic delay generators (Meer 1990), fibre optic shutters, and in Photomasking and Photoresist materials (Hawker 1993). Sol-gel based coatings may also be used for ophthalmic lenses such as scratch resistant coatings on sunglasses. The colouring changing process is described as the, ring opening/ring-closing process (Brown 1971) This is where the molecules lie flat in there closed form before UV radiation. In this state the substance is colourless. Once UV light is exposed to the substance, the molecules react by twisting, creating an open form. This open form causes the Photochromic dye to turn into a colour. Once the UV light is removed, the molecules twist back to their flat state, reversing back to the colourless substance. Depending on the intensity of the UV light and heat, the speed of which the reverse effect may vary. This process can be repeated many times; however the colour will become less and eventually dim. New Photochromic dyes are now being introduced to slow the fading effect and eventually stop it. Scientists can create different colours of Photochromic dyes by mixing Photochromic pigment powder. In their pure state, Photochromic dyes are powdered crystals that must be dissolved in the inks to which they are added. Some manufacturers microencapsulate the Photochromic dye in their own system, as with leucodye microcapsules. Microencapsulating Photochromic systems enables them to be used in inks that cannot dissolve them, such as water-based systems. Even on cloudy days, Photochromic dyes exhibit bright colour changes when taken outdoors. (Just as with lenses) The colour you see may differ slightly on very hot days or if a UV lamp, rather than sunlight, is used to excite the materials. 5. Organic Photochromism Fritzsche reported in 1867 the bleaching of an orange-coloured solution of tetracene in the daylight and the regeneration of the colour in the dark. Later, Meer found a change of colour of the potassium salt of dinitroethane in the solid state (yellow in the dark; red in the daylight). Another early example was published by Phipson, who noted that a painted gate post appeared black all day and white all night (due to a zinc pigment). Research and experiments into organic photochromism has enabled the photochromic process to be used on plastic and other materials. However, organic photochromism is controversial, as this goes beyond the domain of variable optical transmission and includes a number of reversible physical phenomena such as optical memories and switches, variable electrical current, ion transport through membranes, variable wet ability, etc. For this purpose, organic photochromic compounds are often incorporated in polymers and liquid crystalline materials. 6. The Chemical Process of Organic Photochromism Organic Photochromic materials consist of a polymer matrix of optical quality having a refractive state and at least one dye that imparts Photochromic properties to the matrix. A dye must be selected from a group consisting of spiropyrans and chromenes. This compound is then put under intense radiation to form Organic Photochromism. This then can be placed in specialist lenses and materials. 7. Organic Photochromism in Cosmetics In general cosmetic materials, Organic Photochromism is being used in cosmetic and related formulations. Colouration has been employed as a cosmetic device for many centuries (Farrer-Halls, 2007) Materials and methods for achieving predictable and safe cosmetic colouration are being continually explored and improved as evidenced by the large and expanding worldwide cosmetic business. Materials which change colour under the influence of light, i.e. photochromics, can be designed on the molecular level to interact with light to maintain, or even evolve a particular colouration. These materials can be designed to maintain a particular cosmetic look as the ambient lighting changes or as the user moves from place to place. It may be advantageous for the Photochromic response to be reversible. The influence of water can be anticipated and pH balance must be incorporated into the overall system design. It would be advantageous to design a class of materials for which ambient office light, or highly directed light such as in a tanning booth, or even laser light, could be utilised, each creating and imparting a particular predictable cosmetic look. There are, of course, many organic Photochromic materials. However, by necessity, to have a strong absorption feature in the visible part of the spectrum which could be the basis for an effective cosmetic colouration system, the molecular structure often contains a delocalised pi electron system (Farrer-Halls, 2007) Molecules having bonding features associated with such electronic structure, e.g. polycyclic aromatic hydrocarbons, coal tar products, azo dyes, quinoline, and like molecules with or without fused heterocycles, are often carcinogenic and so less desirable or unacceptable as candidates for use as cosmetics as Gill Farrer-Halls (2007, pg2) claims in her book, Naturals and Organics in Cosmetics Many types of organic molecules penetrate the skin barrier and so pose increased toxicity risk. This is a major problem because it would require more complicated testing and evaluation to establish the risk of such materials. Inorganic materials are well known which, because of their insolubility in water and their relatively large particle size, do not penetrate the stratum comeum to any major extent. For example, rouge, being iron oxide, and titanium-dioxide are two widely used oxides with well established safety history (Farrer-Halls, 2007) In fact, most metal oxides, with the possible exception of those used close to the eyes, are more likely ingested, and therefore dangerous if the particles are breathed. There is, therefore, a negligible risk if the oxides are immobilised in a cosmetic formulation. The objective of the design is to identify metal oxides, metal bronzes, and protein based Photochromic systems (materials) which combine novel cosmetic properties with sun blocking. (Farrer-Halls, 2007 pg5) Organic Photochromic systems have novel applications in cosmetics because the colouration they supply can be accented and softened and otherwise manipulated by the application of light, allowing greater control and range of effect than for a single colour application. Conventional colouration, i.e. rouge, can only be manipulated by mechanical means, i.e. rubbing and spreading. In addition to using these materials for their pleasing colouration effects, they can also be used as an actinometer/dosimeter that a person can use to gauge his/her exposure to bright sunlight or in other tanning/burning settings. The concept is based upon the use of the intrinsic Photochromic properties of certain solid transition metal oxides for cosmetic and sun blocking effects. The solid metal oxides suitable for use in this invention are those which undergo Photo induced and thermo enhanced loss of gas phase O2 to produce mixed valence oxides and include WO3, V2 O5, TiO2 and MoO3 (Farrer-Halls, 2007) A particular oxide can be operationally established for any possible choice of oxide by exposing a possible candidate oxide to blue-green or shorter wavelength light under vacuum and observing whether a colour change occurs. In some cases, the oxide is doped with an alkali metal ion or proton to enhance the colour change. As described above, tungsten and molybdenum oxide, and oxides of other metals, and bronzes derived from such oxides, constitute a broad class of materials having potential application as Organic Photochromic sun block/cosmetics. These materials are well known in the context of Photochromic optical data storage media and they offer an excellent match with the very properties needed for cosmetic applications. This relates to the adaptation of the class of tungsten and molybdenum oxide-photochromics to sun blocking/dosimetry, energy storage, and cosmetic colouration (Farrer-Halls, 2007) 8. Photochromic Textiles Photochromism in textiles seems to be a long and complicated process. However it is rather a simple method to produce dyes and inks that can be transformed into fibre to create textiles that react to UV light. Generally the colour-change inducing light has a wavelength in the visible or near visible range. Other factors which may affect the colour of these pigments have been cited by Glyn Phillips (1997 pg 4) include, temperature, moisture, electricity, and gases. Photochromic pigments have previously been applied to textiles by coating processes. Such coated textiles have aesthetic qualities associated with the Photochromic pigments. However, these textiles are not sufficiently colour-fast and their aesthetic qualities are easily destroyed by soiling. Mentioned previously, each time the colour changes due to the reaction of UV light, the colour intensity drops to eventually no apparent change will take place. It has now been discovered that Photochromic pigments can be blended into resinous fibers, yarns or non-woven textiles without substantial loss of Photochromic properties. The dye used can be introduced into this process from a master pigment batch obtained by mixing chromogenic pigments with a low melting polymer. (Phillips, 1997 pg. 5) In the process, the dye is blended with resin (the primary resin) and the mixture is processed into textiles by spinning and drawing or by the spin-bond process. The textiles manufactured by this process are advantageous over the prior method coated products in that the resultant Photochromic pigment-containing textiles are more durable (e.g., more colour-fast), more brightly pigmented, easily laundered after staining (e.g., by soil, solvents or oil) and readily woven directly into the desired fashion. Generally, conventional methods of blending polymers and dyes and of extruding synthetic fibers or non-woven textiles are used in this process. Blending can be done in a fusion type metric mixer, a volumetric type mixer or a weight type mixer. (Phillips, 1997 pg 7) The processes that may be used to manufacture the fibers or non-woven textiles include spinning and drawing processes, continuous spin-draw processes and spun-bond processes for the manufacture of non-woven textiles. However, these processes are modified in accordance with the concept/product such that the Photochromic dye is not subjected to a temperature in excess of about 250 ° C. Preferably, the Photochromic dye is introduced into the polymer mixing process in a master batch of polymer-encapsulated dye pellets. Such Photochromic dye pellets have been described, Generally, the amount of pigment in the masterbatch is from 1 to 10%, preferably from about 2 to 7%. (Phillips, 1997 pg 8) The use of dye pellets in place of directly adding dye facilitates uniform mixing and enhances the the overall process. For use in the production of synthetic fibers or non-woven textiles containing Photochromic pigments, the master batch is mixed with a primary resin, which may or may not be the same as the carrier resin in the master batch. The amount of masterbatch blended with the primary resin ranges from 1:2 to 1:100. The resins used as the primary resin are those with a melting point between about 105 ° C. and about 215 ° C. (Phillips 1997 pg 8) Useful resins include, polypropylene, polyethylene, polyolefins copolymers and terpolymers. Additional fillers and pigments, such as talc, silica, titanium dioxide, calcium carbonate, and conventional organic pigments, may be added either to the master batch or during the final fiber or non-woven textile manufacture process. 9. General Applications General applications of Photochromism can be divided into two categories: a) Those directly related to the change in absorption or emission spectra such as variable transmission optical materials, optical information storage, cosmetics, authentication systems, and flow field visualisation. b) Those related to other physical or chemical property changes such as refractive index, electric conductivity, phase transitions, solubility, viscosity, and surface wet ability. Photochromic can now be used in many areas of design. As photochromism has a wide range of solid states, from textiles to glass, (but only one function) most products which use this process are novel. Here are some examples; On garments to create novel products and promotional items like T-shirts On fabric/garment to print company logo / brand name to prevent duplication On garment which are used for party wear Thermometers and temperature indicators Security printing Food industry to indicate temperature of packaged food Photochromic substances can be found in inks, paints, papers and textiles. This property is a boon for scientists doing research on intelligent textiles and smart materials where they are making use of this property to store data on the surface of textile fabrics and polymer sheets. (Whereas the same property of some reactive dyes; is a bane for textile processors. The change in shade after dyeing creates unwanted problems in dyeing) An optical recording medium contains, on a base, one or more dyes and a polymer which forms liquid-crystalline phases. The information is written into the equally oriented liquid-crystalline polymer layer, for example by means of a laser. During this procedure, the polymer heats up locally to above a phase transition temperature. By cooling, the resulting change is frozen in the glass state. The information can be erased by applying an electric field and/or heating. The recording material permits high-contrast storage and possesses high sensitivity, good resolution and excellent stability. There are other chromatic properties called electrochromatism and thermochromatism of dyes that are affected by electric field and heat respectively. 10. Future Products The first Photochromic eye lens is being developed by scientists in Singapore, the Institute of Bioengineering and Nanotechnology (IBN), the worlds first bioengineering and nanotechnology research institute. This lens is another world first. The IBN has developed a Photochromic contact lens that will darken upon exposure to sunlight to protect the eyes against harmful ultraviolet radiation and glare. The lenses will conveniently adapt to changes in light and provide optimal indoor and outdoor vision. The IBN scientists also claim that this will help treat eye diseases by incorporating medication into the lens which can deliver medication effectively rather than eye drops. Another future product is Photochromic windows at home and workplaces. These windows will change colour when exposed to UV light from the sun, which will in return make home/workplace cooler and a more comfortable place to be in. Reversible Photochromic textiles have been around for 20 years, (mainly on novel garments) designers and scientists are trying to convert this technology into safety equipment and garments. The only drawback to this concept is that to make the product work during the night, when these safety garments are more needed. Photochromic relies on UV light to work effectively. Unless car head-lights radiate UV, this wont work, and car head-lights giving off UV light is a whole and completely different matter. As mentioned above in general applications, scientist can record and store data using Photochromic dyes. This data can be stored onto any material surface, but at the moment only being used on textiles. This technology has a huge amount of potential. Imagine the data on a personal USB device being stored onto a piece of fabric that the user can roll up into a pocket. The technology can be manipulated to give data back to the user through many objects. The user could watch/read the news on the users glasses; receive emails and correspondence and perhaps even text messages. The only drawback is responding to them. 11. Conclusion Photochromic technology has an immense amount of potential to create new products and in some cases a whole new lifestyle. Scientists can now manipulate Photochromic technology into most applications. Controlling the colour result of Reversible Photochromic is in itself a great achievement. Instead of a dull tone of grey, the colour can be anything from bright green to pink. Making Photochromic available in different materials, from glass to liquid, including textiles, makes this technology unique. Experimentation in novel-products, such as, T -Shirts that change colour when exposed to sun light, has enabled scientists to understand the chemical compounds and how to manipulate them to suit a concept. Now Photochromic technology is being used in more sophisticated ways, such as, the eye contact lens and storing data. This beak through in new technology can have fantastic results for future generations. It will affect the way people work and learn.

Australian Poets: Oodgeroo Noonuccal Essay

This week we will be talking about an aboriginal poet Oodgeroo Noonuccal, also known as Kath walker, who lived from 1920 until 1993. Oodgeroo came from the Noonuccal tribe in Queensland. Once she had completed primary school she left because she believed that even if she stayed in school there wasn’t the slightest possibility of getting a better. Oodgeroo travelled the world telling others about the dreadful conditions the aboriginals were living under and campaigned for equal rights across Australia. Oodgeroo has published many poems including: Understand old one, Municipal gum, Namatjira and We are going. Although she did not begin publishing her poems until she was encouraged by a well known writer, when she was in her forties. Oodgeroo expresses her opinions on how life has changed for aboriginals through her poetry. This is evident in the poem Understand old one. In this poem Oodgeroo compares what Australia was like for her ancestors to what it is like for her. This poem expresses how life in Australia has changed especially for aboriginals. In the first half of the poem Oodgeroo is talking about how life was for her ancestors. It was calm and serene ? there on the old peaceful camping place of your red fires along the quiet waters’. She uses the soft drawn out words such as ? peaceful’ and ? place’ to help this image. Then she explains what life is like now. The busy cities, cars everywhere, ? towering stone gunyas high in the air’, ? planes in the sky’. It is now noisy and busy. She uses quick short sentences in this part of the poem to help bring across the idea of busyness. Her world is the complete opposite of the world that her ancestors lived in. Oodgeroo uses a metaphor of bees. She compares the swarms of cars in the city to bees to give the image of fast, paced, hustle and bustle of the city. She also uses alliteration to help emphasise the imagery used. She uses the alliteration of ? p’ sounds in the first half of the poem to help bring across the image of serenity and peacefulness. She then uses the repetition of ? s’ sounds (sky, swarm) to give an almost buzzing sound to help with imagery of bees. Finally she uses ? f’ sounds of ? frantic’ and ? flight’ to give the impression of speed. Oodgeroo also expresses her view on the way aboriginals have been treated in her poetry. An example of this is municipal gum. This poem compares the image of a gum tree in a city street and an overworked animal to what has happened to the aboriginal people. Oodgeroo compares the aboriginal people to the gum tree when she says ? o fellow citizen what have they done to us’. She likens the tree to herself giving her and the tree a sense of unity. She does this to help give a picture of how aboriginal people have been treated. She also compares the gumtree to a cart-horse. The gumtree has been removed from the forest and placed in the city with hard bitumen around it just as the poor cart-horse has been abused, ?castrated, broke, a thing wronged’ and ripped out of its habitat and is now depressed and miserable. She uses imagery throughout this poem. Firstly she gives the image of the ? cool world of leafy green halls’ where the tree should be. Then she says ? set in your black grass of bitumen’ giving the image of the tree imbedded in bitumen rather than in green grass. ?Whose hung head and listless mien express’ is giving the image of this animal that is broken, sad and wishing for death because it is so miserable. At the end of this poem Oodgeroo asks the rhetorical question ? What have they done to us? ‘ This gets the audience thinking but it also suggests that this image of a gum tree is just like what has happened to the aboriginal people. It compares the aboriginals to this gumtree stuck in the city instead of its natural place, the country. Oodgeroo often uses language that is spoken by aboriginals rather than proper English in her poetry. For example in municipal gum she says ? here you seems to me’ which breaks grammatical intentionally so that the language is closer to aboriginal spoken language. Another example is in Understand old one when she uses the word ?gunya’ to describe modern buildings. Gunya is the aboriginal word for houses. She purposely uses aboriginal language to create empathy and contrast and make it more aboriginal. Oodgeroo’s many works have been recognised for a number of awards including the Mary Gilmore medal (1970), The Jessie Lynchford Award (1975) and the Fellowship of Australian Writers’ Award. Oodgeroo was inspired by her aboriginal upbringing and heritage to write this poetry. Her father was a major influence. He told her to always be proud of her aboriginality and she was.

Brick & Click Essay

A brick means a retail store, and a click means an e-commerce website. The main choice when a new company is starting out is whether to have a brick or a click to get their company going. There are several advantages and disadvantages to choosing either a brick or a click. One advantage of having a brick store to begin with is that when a new company starts people may be wary about completing a transaction online with the company as they do not know if it is trustworthy or not when giving out card details and PayPal account details and similar things. Therefore, by beginning with a brick store people can deal with others face to face and complete the transaction straight away. There is less chance of losing money or having card details stolen if you are using them yourself, rather than relying on someone or something else. If you have a problem, it is very easy and simple to deal with it in a brick store where it may be difficult to get in contact with those on a click e-commerce website as you would need to either write a letter, use the telephone, send an e-mail or file a complaint online on the actual website and you may not get a response. In a brick store you can simply go into the shop and deal with it there and do it face to face with an employee of the company. Another advantage of a brick store is that if there is a problem with the product you can also simply return it to the store and get a change of item or your money back, online this may be a problem as it will cost for postage and packing, it will also take much longer as well. One of the main advantages of starting with a brick store is the possibility of hackers that could put off consumers from purchasing items online. This therefore means that some people prefer to do their shopping in person in a retail store where they can see what is happening. Another advantage is that you can put your hands on a product and test it, to  see if the customer likes the product. On a click store all you can do is look at an image with other details such as size and colour. You can for example try on clothes in store however you have to rely on a size being the same as similar clothing items that you own. However, there are also a variety of advantages to beginning with a click store. A main one is how much cheaper it is to simply open a website in comparison to a retails store. The company will not need to employ anywhere as near as the amount of people that would be employed in a retail store, as well as paying bills for the building and lighting and whatever else. All that is needed online is to make the website, maintain it and update it if necessary and then people working in a warehouse to send out the products to the customers. Another advantage is the convenience of a click store. This means that people can use it anytime of the day and the company don’t need anyone on the website to complete a transaction or anything like that. This means that products can be purchased and ordered at any time that you want to browse the internet. There is no opening and closing times to a click store. From an e-commerce store you can check to see if a product is in stock on one website and then if not just simply browse round all the other similar websites without leaving your home and find a website that has the product in stock and purchase it. You can go to other brick stores if the product you wanted was not in one store, but it would take much longer and there is also much more companies online than there will be in the same town or city. It is much easier to find a product online and you can simply use a search bar to enter keywords for what you are looking for and then browse all the results that it brings up. This will bring up hopefully what you were looking for as well as similar items which you may then prefer that you would not have known about if you had just walked into a shop and bought the product. You can also pay all bills and whatever is owed from your own home online which is much easier and simpler.

Gender Inequality - 1645 Words

Gender inequality is currently a hot topic in our society. From education, to the entertainment industry, and more importantly, to our daily lives, gender inequality has created a powerful divide between females and males. The same trend follows in the workplace, where females are less likely to hold positions of authority compared to their male counterparts, which is a key contributor to the workplace gender inequality all across the United States. There are a lot of common misconceptions about the facts and aspects of workplace gender inequality. For example, many people believe that women themselves choose lower paying jobs that have little or no authoritative roles. Or that the gender pay gap and inequality in the workplace is due to†¦show more content†¦Therefore, by allowing more females in manager positions, companies can easily facilitate gender equality in the workplace. Fuller and Schoenberger offered their own insight on this topic with their article titled The Gender Salary Gap, which explored the influence of different levels of education, hands-on career experiences, and choice of major, on the starting salaries of college graduates. They narrowed their research by choosing candidates that were business majors, such as finance, accounting, etc. They filled the gaps of previous research by finding measurable factors that affected the salary gap, and they also asked whether a certain set of characteristics had the same effects later on in the person’s career as it did in the beginning (Fuller 179). By using quantitative methods such as regression analysis, decomposing of differentials in starting salary, and by quantifying candidates’ characteristics, so they could be easily measured and compared, they found that the more educated and experienced a woman was, the higher her starting salary. Education and experience, along with the other characteristics declined in impact over a couple years of working, for both men and women. The results also showed that â€Å"women in the sample were more likely toShow MoreRelatedEssay On Gender Inequality1127 Words   |  5 Pagesâ€Å"superior† race/gender of a white male were typically treated as if they were less. Women and African-Americans aren’t being treated as bad today, but they’re still being treated worse than the white males of society. Even today, when white males are typically the leaders of society, it’s not always race and gender that creates inequality; sometimes it’s money that c reates the issue. Not just from past evidence, but from present evidence as well, America shows signs of inequality by the way peopleRead MoreSocial Inequality And Gender Inequality Essay2163 Words   |  9 Pagesn AmericaSocial inequality is defined as the set of unequal for different social classes or statuses for various individuals within a group or society. It usually refers to people of distinct genders, ages and ethnicities. Many American’s have experienced some type of social inequality throughout their lifetime. America’s gaping inequality is seen everywhere from education to the workforce. Society tends to oversee inequality based on race, gender, and other social characteristics believe that racialRead MoreSocial Inequality And Gender Inequality Essay2091 Words   |  9 PagesSocial inequality is defined as the set of unequal opportunities for different social classes or statuses for various individuals within a group or society. It usually refers to people of distinct genders, ages, and ethnicities. Many American’s have experienced some type of social inequality throughout their lifetime. America’s gaping inequality is seen everywhere from education to the workforce. Society tends to oversee inequality based on race, gender, and other social characteristics . AmericansRead MoreGender Inequalities And Gender Inequality922 Words   |  4 PagesGender Inequalities in Education Judge Sonia Sotomayor states, â€Å"Until we get equality in education, we won t have an equal society. That quote resonates throughout the world because of gender inequality in education. Researchers believe gender inequality still exists in the 21st century. Through research, controversial opinions exist about inequality in schools and what has been done to address this situation. What is gender equality? Gender inequality refers to disproportionate dealing or assessmentsRead MoreGender Inequality : Gender Inequalities825 Words   |  4 PagesMichael Ursini Mrs. Karen Cardenas English 4 Sec 03 Sum 17 07 July 2017 Gender Inequalities Thesis: While this could be the best thing the world could accomplish if something changes, Women and men should not be segregated into their own category. Because both genders should have equal rights when it comes to working, money, households, relationships and other categories. This problem has been around for a long time but never been brought to a lot of people s attention, because of this nobody talksRead MoreGender Inequalities And Gender Inequality1791 Words   |  8 PagesGender inequalities have been around since the beginning of time, and it has been a long and bumpy road to achieve the amount of equality that we have today. Still everyday women have the risk of being discriminated against for simply being women. Depending on where these women live, what the predominate culture in the area is, and the amount of education that is allowed affects their risk of being discriminated against and the severity of the act itself. Discrimination can be displayed in formsRead MoreG ender Inequality And Gender Equality1667 Words   |  7 PagesGender inequality is the state in which access to rights or opportunities is affected by gender. Gender inequality is an issue not just nationally but globally. This issue is portrayed by the mistreating of individuals, mainly women, and not valuing everyone as one. This presentation will illustrate the exploration of gender equality, propose a solution and why that solution will produce a better future for a better world. Gender inequality is a very important issue common in our world today thatRead MoreGender Equality And Gender Inequality979 Words   |  4 Pages Throughout the past few decades, the gender inequality discourse have became a dominant feature of international, national and local policy debate on the subject of economic development. This policy concern has emerged as an area of scholarly research which seeks to show that improving gender equity leads to economic growth. Gender Inequality in Australia: According to the data published by Australian Bureau of Statistics in May 2015, the full time average earnings of women is $284.20 or 17.9%Read MoreGender Inequality And Gender Inequalities1787 Words   |  8 PagesGender inequality plays a critical role when it comes to social progress. As a woman, I have seen the struggles for equality to men in many aspects. Regardless of the great strides that women have achieved today, it is still hard to find equal opportunity and to be fairly recognized. Some of the areas where gender inequality is very prevalent are in areas such as, equal pay in the workplace, professional education careers, household work, sexism and discrimination just to name a few. GenderRead MoreGender Inequalities Of Sports And Gender Inequality1468 Words   |  6 PagesGender Inequalities in Sport Men throughout history have been the dominant gender, from the times of hunting with stone weapons to the modern day metal and automated machines. Many negative connotations are thought of when comparing women to men like strength, but less so when comparing men to women. Is it the society’s view that women are weaker than men or is it a natural fact brought to light? In sports women experience many prejudices, but even so some sports are equal or even female dominant