Ethanol on the heart rate

Ethanol on the heart rate Effects of different concentrations of ethanol on the heart rate of the water flea In this experiment I will be looking at the effects of different concentrations of ethanol on the heart rate of the water flea, Daphnia because using humans in a study to test the effects of Ethanol on heart rate would not be ethical. Daphnia, like many animals, are prone to alcohol intoxication, and make excellent subjects for studying the effects of the depressant on the nervous system due to the translucent exoskeleton, and the visibly altered heart rate.Ethanol is a small molecule, RMM of 43, so it crosses cell membranes by simple diffusion. The exoskeleton of Daphnia is not waterproof, so there are no waterproof waxy layers to cross. The gills are particularly thin-walled and optimised for diffusion. They live in various aquatic environments ranging from acidic swamps to freshwater lakes, ponds, streams and rivers. They are tolerant of being observed live under a microscope and appear to suffer no harm when returned to open water. The experiment consists in preparing 5 different environments to put the water flea in, and observe how the heart rate responds to each change; the change will be the increase of ethanol concentration %. This will be the independent variable. The dependent variable is the heart rate of the Daphnia. Hypothesis : Ethanol will decrease the heart rate of the Daphnia. Null Hypothesis : Ethanol will have no effect on the heart rate of the Daphnia. I will change the concentration of my Ethanol solution by dilution and will therefore plot a graph. In addition, a correlation and ANOVA test will be calculated to determine the relationship (If any) between the concentration of Ethanol and the heart rate of the Daphnia. I have taken into consideration factors that will affect my overall conclusion Factors: Size of Daphnia The size of the Daphnia will affect its absorption of Ethanol and also the metabolism of the drug in the liver. Different rates of metabolism will result in different heart rates. As a result I must ensure that I choose Daphnia which are the same size when conducting repeats. I will use a highly sensitive scale to confirm that both daphnia are of equal body mass. Time kept in ethanol solution The Daphnia must be kept in the Petri dish full of ethanol solution for a specific amount of time. If they are kept in the solution for too long they will become intoxicated which will result in abnormal heart beats that are hard to measure although they must be kept in the solution long enough for sufficient absorption of Ethanol. Each Daphnia will stay in the ethanol solution for exactly 3 minutes so that an equal volume of ethanol is absorbed. Activity of Daphnia Some Daphnia tend to be more active than others and these will have a higher heart rate compared to ones that are idle. After allowing the Daphnia to swim in a specific solution of ethanol I will place them on a cavity slide so that I can observe the heart rate with a microscope. As I will be using a pipette to transfer the Daphnia from the Petri dish to the cavity slide excess fluid will be found on the slide which must be removed with tissue so that all Daphnia remain idle/immobile and not active I.e. swimming on the slide. This will also allow me to measure the heart rate with ease which reduces the likelihood of human error. Time left under the microscope If the Daphnia are left under the microscope for too long they will become stressed due to the heat of the microscope light and this will increase the heart rate of the Daphnia due to the secretion of adrenaline therefore I must ensure that the microscope is switched off when not in use. The cavity slides must be allowed to cool down before using them again as they tend to heat up. Impurities on cavity slide Traces of impurities including ethanol from a previous experiment may be left on the cavity slide which may slightly affect the heart rate of the Daphnia therefore the slide must be cleaned and dried thoroughly before each repeat. Alternatively, a new slide may be used for each repeat. The materials needed to perform this experiment are the following: Normal size syringe 2 Small syringes (must have units of measurement) Open top pipette Ethanol of 1% concentration Various Daphnia to perform experiment on Microscope 6 Petri dishes Cavity slide Marker Kleenex tissue for absorbing excess liquid Scale Stopwatch Method : 1. The first thing that has to be done is the preparation of the different solutions where the Daphnia will be placed. To do this you will need the small syringe, and 5 Petri dishes. It is very advisable to have labels. The first Petri dish will contain 0% Ethanol, in other words just water. With a small syringe, take 10 ml of distilled water (the use of distilled water is important as you will be removing any materials that may have an effect on the Daphnia heart rate) and place it in the Petri dish. The syringe you just used will only be used with water and not for the Ethanol. Put a 0% label on the Petri dish in order to keep track of the different concentrations you will be making. The next Petri dish will contain 0.2% ethanol concentration, and you will make concentrations going up to 0.8%, so: 0.2 %: With the other small syringe (this one will only be used for ethanol), add 2 ml of the 1% Ethanol, to 8 ml of distilled water 0.4 %: Add 4 ml of the 1% ethanol, to 6 ml of distilled water 0.6%: Add 6 ml of the 1% ethanol, to 4 ml of distilled water 0.8%: Add 8 ml of the 1% ethanol, to 2 ml of distilled water remember to label each concentration accordingly 2. Set your microscope up, put it on medium magnification. Do not turn it on yet because the light of the microscope can heat up the environment where you will be observing the Daphnia. It is important to try to keep the temperature of the experiment as stable as possible. Heat may modify the Daphnia heart rate, and the effect of heat on the heart rate is not the purpose of this experiment. 3. Now it is time to pick out one Daphnia from the glass or container where you put all of them in. It is important to use only one throughout this whole experiment because different animals may present variations in their response to different environments. With the open top pipette, try to pick out a Daphnia which is not too small, as it will be harder to observe the heart rate if it is small. Once you have managed to take one out, place it in the remaining empty Petri dish. Take the normal size syringe and very carefully suck the Daphnia in with as least water possible. The objective is to have the Daphnia right at the tip of the syringe. Squirt the Daphnia out into the cavity slide. It is very important to put the Daphnia in with the least water possible, in order to prevent it from moving too much. It is recommended to try to squirt it out with only one drop of water, as this will keep it alive, but immobile. Use tissue to remove excess fluid. Put the slide under the microscope. Turn the microscope on. 4. Make sure you can see the Daphnia clearly under the microscope, once you are happy with the image, look for the heart: 7 is the heart. If you can see the heart, and can keep track of its beating, put the Daphnia, with the normal sized, syringe into the 0% labelled Petri dish. Wash the microscope slide with water and dry it. Turn the microscope off. 5. Keep the Daphnia in the Petri dish for 3 minutes, this lets it adapt do the conditions and also increases the probability of it surviving the whole experiment. With the normal size syringe take it out of the Petri dish and put it onto the microscope slide, make sure that it is practically immobile (by making sure that you squirted the least amount of water possible) and put it under the microscope. Turn the microscope on. 6. Get the paper and marker ready. Look into the microscope and make sure you can count the heart beat. Get someone to count 15 seconds with the stop watch. During 15 seconds, tap the paper with the marker each time the heart beats, after this, count the number of dots on the paper. Multiply this number by four; this gives you the heart rate per minute. Record the result. Do this process 3 times in order to get 3 heart rates. Add the 3 heart rates and then divide the result by 3; this will give you the average of the Daphnia heart rate under those conditions. Keep the Daphnia under the microscope for a maximum of 2 minutes, because the heat of the light in the microscope could have effects on the experiment. Turn the microscope off after the count to prevent further heating caused by the light. 7. Remove the slide from the microscope, and with the normal size syringe put the Daphnia into the 0.2% labelled Petri dish (wash the slide with water and dry it). Leave the Daphnia in the Petri dish for 3 minutes once again. After 3 minutes, use the normal sized syringe to put it onto the microscope slide. Repeat step 6 and record results. 8. Count the heart rate of the Daphnia when placed in all the concentrations. Work your way up from 0% to 0.2% to 0.4%, 0.6%, 0.8%. Make sure you rinse and dry the slide with the distilled water after each time. You must start from the lowest concentration up to the highest concentration because the Daphnia has to gradually adapt to the changes, you will be reducing the probability of it dying. Another reason for this is that if you start at the highest concentration, the impact on the Daphnia will be too dramatic and you will not see any trends once you try a lower concentration, it will have an effect of intoxication. Remember to repeat each count 3 times to obtain an average of the heart rate. Keep the Daphnia under the microscope during the same amount of time for each concentration, this will ensure that if there was any type of effect from the light under the microscope, all tests will be fair because they were under the exact same conditions. It is possible for the Daphnia to die during these tests; this is why you must have acquired a fair amount of Daphnia, in order to have back-ups. 9. Repeat this experiment once or twice with different Daphnia, in this way you will be able to analyse any trends present in the experiment more accurately. I will use the following tables to record the results of this experiment: Averages will be calculated for both experiments and the results will be organised in a separate table. My conclusion will be based on these averages because they are more representative. Modifications made to method: The Daphnia used in the first experiment died after being placed on the cavity slide from the 0.6% ethanol solution probably due to the lack of fluid on the slide so I had to restart the experiment using another Daphnia. No one was available to count 15 seconds with a stopwatch so I had to use my mobile phone which beeped after 15 seconds prompting me stop counting the number of heart beats. Results

The Horror of War Exposed in Slaughterhouse Five :: Slaughterhouse-Five Essays

The Horror of War Exposed in Slaughterhouse Five When one begins to analyze a military novel it is important to first look at the historical context in which the book was written. On the nights of February 13-14 in 1944 the city of Dresden, Germany was subjected to one of the worst air attacks in the history of man. By the end of the bombing 135,000 to 250,000 people had been killed by the combined forces of the United States and the United Kingdom. Dresden was different then Berlin or many of the other military targets which were attacked during World War II because it was never fortified or used for strategic purposes and, therefore, was not considered a military target. Because of it's apparent safety, thousands of refugees from all over Europe converged on Dresden for protection (Klinkowitz 2-3). Dresden's neutrality was broken and the resulting attacks laid waste, what Vonnegut called, "the Florence of the Elbe." Kurt Vonnegut was a witness to this event and because of fate, had been spared. He wrote Slaughterhouse Five to answer the questi on that resounded through his head long after the bombs could no longer be heard. "Why me?"- a frequent question asked by survivors of war. Vonnegut was tormented by this question and through Billy Pilgrim, the protagonist in Slaughterhouse Five, he attempts to reconcile the guilt which one feels when one is randomly saved from death, while one's friends and loved ones perish. Billy Pilgrim's own life was spared, but was never able to live with himself knowing that so many others had died. The feelings of guilt which emerged from his having survived the bombing of Dresden and from Billy's fortunate escape from death under the shelter of the fifth Slaughterhouse haunted Billy through much of his life. Billy Pilgrim did not consider his survival a blessing, but a curse. A curse to be forced to live on with the guilt of survival. Billy Pilgrim faced such tremendous guilt, that he spent his entire life after Dresden trying to alleviate himself of it. His guilt is in many ways comparable to the guilt felt by the survivors of the Holocaust. Many Holocaust survivors had to face their own "Why me?" question. However, many Holocaust survivors w ere

Travel agency or company

The act of traveling to different places for leisure or recreational purposes is leisure travel and tourism is a travel for leisure or recreational purposes. Globalization has increased the tourism industry a big boost. Tourism is one of the fastest growing industries that contribute greatly to the economy of a country in this era of globalization. Majority of the working class spend their leisure time for travel. Many services describe a leisure travel experience that include guided tours, farm stay tours, tours for the activity of the kids, entertainment programmes at resorts or hotels, and weekend accommodation/holiday packages.A travel agency or company sells the travel services, particularly the package travel. There are commonly three types of three different types of agencies that include multiples, maniples and independent agencies. The multiples comprise of national chains of international conglomerates. A package travel comprises of a pre-arranged travel for 24 hours, which is a combination of accommodation, transport and a tourist service such as entertainment that forms a significant part of the package. Normally there exists an exclusive price for this package travel.The package is generally provided for a discount and the travel company should provide the information regarding the requirements of the visa and passport, health requirements. The Brisbane is the state capital of Queensland, Australia, with tourism as an important industry for the economy of the state attracting 4. 9 million of domestic and 0. 9 million international visitors annually. Brisbane neighbors the tourism capital of Australia, the gold coast, with golden beaches and exciting nightlife.The present paper discusses on designing the leisure travel product, a package tour to the Brisbane the capital of the state of Queensland, Australia. It also analyses the existing market opportunities for the product when compared with the products of the similar nature. Variables of the mark eting mix in a package tour: Product: The product in the tourism industry is the customer value, and for the elements of the marketing mix to be effective, it is important to concentrate on the unique characteristics of the product for tourism, the demand and the range of the determinants for the demand.In a tourism industry, for a strategic planning of the product there are two possible approaches that include, Market approach and the destination approach. It is important to select the right package of products to make the market more attractive. Securing a unique position and a good reputation in the market is very important for the strategic place of the product in the market. A package of benefits and offerings that can meet the expectations of the visitors, investors will increase the business.Promotion: Communication in an effective way plays an important role that increases the effectiveness of the market. Awareness of the product: it is important to make the customer aware o f the product to get the attention of the customer. Interest: generating interest on the product plays an important role. Desire: Creating a desire that is related to the needs relative to the competitors is important. Action: stimulating the target market to purchase the product plays an important role.Giving the information and building awareness of the product, creating a positive attitude towards the product, and creating a good climate for purchase by clearing the doubts about the product are some of the attributes that has to be considered for promoting a product. The product offering in the form of stimulus input that provokes for a holiday tour, taking the full advantage of product promotion through the communication channels such as guides, brochures etc, will motivate the customers to purchase the product.Price: The price factor in the tourism industry is perceived in terms of value for money. This is largely influenced by the prior expectation of the customer as to how ex pensive or cheap the trip would be. The price and the perception the price in the market needs to be handles carefully in the marketing mix. Description of the travel product, the package tour A package tour is a service that comprises of transport and accommodation organized by a tour operator and sold by a travel agent.The package tour of the modern times has evolved from the package tours of 1960’s when there was a package tour that comprises of flights, accommodation and transfers. These package tours mostly existed in the United Kingdom where most of the people got an affordable travel to various destinations including the foreign travel. With a decreasing demand for the package tour, the sector is now largely operated by a few large tour operators. With the advent of dynamic tour package, the consumers have the freedom to choose their own packages consisting of accommodation, flights and transfers.(First conferences battle, 2005). Analysis of the product: Australian cul tural environment is unique in that it is a combination of the aboriginal, Europe and American cultures. The excellent cities, snowfields, deserts, rain forests, and the golden beaches of Australia provide a wealth of travel experiences. Australia is a tourist attraction for its events, arts from aboriginal culture, antiques, cuisine and most of all the flexible government policies to obtain visas for the foreign tourists.Contributing a large share to the economy, tourism in Australia represents about 5. 9% of the GDP. With a large number of domestic and international tourists visiting every year, there is a lot of scope for the dynamic package tours in the country. Activities and benefits of a package tour: The activity of a package tour is to plan a journey to a different place without many hazels at a reasonable cost. The benefits of the tour include the avoiding the hassles of searching for accommodation in a new place and all accommodation and transportation are pre arranged.Wi th packaging to tourism the tourism operators get the benefits such as increase in the sales, increasing marketability of the product and increase of the share in the market beyond the own resources. Target markets: Many tourists buy the package tours as they feel it is the secure, economical and a convenient way for a leisure travel. The travel agents can use this opportunity to enhance their product value by offering some compliments along with their services. The best packages give appealing experiences for a good value to the target market.The best package chooses specific products based on the best fit in the target market. Price: Price of the package is decided upon the per customer basis and is calculated based on variable costs, fixed costs and the overhead or the marketing costs. All these costs together with the profit will form the basic package of the price. Location/schedules: Many travelers and the budget minded in particular, prefer the travel that is safe convenient and secure. These package travels are useful for those who travel for an unfamiliar location that is exotic that can be covered in a short period.Many of the partially escorted tours take care of transportation and lodging in which meals are excluded. Personnel for the package tour: The warm and friendly personnel and their welcoming and receiving nature will give the tourists a relaxation. The relaxing environment provided by the personnel at every stage of the travel gives a feeling that the tourists feel excited and relaxed. Physical facilities for a package tour: The organizations, which offers services for package tours has to change the strategy in such a way that the package offered constantly meets the demands of the customer.By considering the aspirations of the tourists, it is possible to manage the resources effectively. Process management policies: The process management policies include package types that supports user-defined product types, dynamic packages that allows choice of items adjusted according to the budget, flexibility in accommodating the packages in different seasons, a complete rule based pricing mechanism, managing multiple currencies, pooled inventory management and powerful traveler reward programme. Competitive advantage or unique selling point:For selling a package, it is beneficial to develop the package that has appealing inventory of experiences, and support services. Developing a package concept that includes setting a theme, market position, and giving a full description of the specific services are appealing to the target market that give a competitive advantage. Travel products offered by one company Package tour-1 The package includes four days and three nights, and the price includes morning city sights, rivers and return private car transfers to airport, hotel and the choice of selecting star hotels including one lunch.Package tour-2 The package tour includes four days and three nights. The pricing includes escorted t ouring with knowledgeable guides. One night each at pinnacles, beach, museums, that includes six meals (3 breakfasts and 3 dinners). Package tour-3 The package includes five days and four nights, the price includes accommodation for two nights at rain forest retreat, excursions, guided walks, morning and afternoon teas, accommodation for two nights at a resort, four breakfasts and one lunch and private car transfer to hotel and airport.Analyzing the strengths and weaknesses of each package tour Package tour-1 Strengths: The strengths include city viewing in the morning, offering choice to choose a star hotel for accommodation and transport by private cars to airport and hotel. Weaknesses: The weaknesses include providing only one lunch during the period of stay. Package tour-2 Strengths: That include visit for the museums, viewing wild flowers, dolphins, beaches, and pinnacles and offering six meals. Weaknesses: Not offering transport by a private car to the hotels and airport.Packa ge tour-3 Strengths: The strengths include providing accommodation for two nights at rain forest retreat, with excursions and guided walks, all transfers, and private car transfer to hotel and airports. Weaknesses: The weaknesses include providing only four breakfasts and one lunch as the travelers has to visit the rain forest retreat. Proposed travel product The travel product comprises of a trip to Brisbane a cosmopolitan city that provides relaxation. The stay includes 3 days and two nights.The price includes two nights at Brisbane, transports by a private car to hotel and airport visit to a sanctuary, and high lights of the city in the afternoon, and a tour to the zoo. The price also includes three lunch and two breakfasts and one dinner and the choice of choosing one out of the three good star hotels for accommodation. The price will be reasonable at 520 US dollars. Presentation of the product A trip to Brisbane A trip to discover a young cosmopolitan city Brisbane will relax y ou from the hassles of routine life.Stay: 3 days and two nights Price: †¢ two nights at Brisbane †¢ private car transfers to the airport and hotel †¢ visit to sanctuary †¢ afternoon highlights of the city †¢ a tour to the zoo †¢ three lunch, two breakfasts and one dinner Day-1 Transport by a private car, a tourist guide will accompany a tour to the afternoon high lights of the city. A visit to the wild life sanctuary, and choice of choosing a hotel Day-2 Visit to the zoo, entertainment by many shows and demonstrations. Day-3Transfer to airport from Brisbane by a private car References From the journals: 1. Angel roper(2005), Marketing standardisation:tour operators in the nordic region European journal of marketing,vol. 39(5/6), pp. 514-27 2. Jay kadumpally(2000), The impact of demand fluctuation on the quality of service: a tourism industry example. Managing service quality, vol. 10(1), pp. 10-19. From the internet: 3. Travel Agents Could Lose Out in t he Dynamic Packaging Battle, First Conferences Ltd. (2005).

Free Essays on The Life Of Ancient Egyptians

Ancient Egypt has bequeathed us an enormous testimony to the skill and genius of its artists draughtsman, painters, relief-carvers and sculptors. The coming pages testify to their creations, but here we shall focus on the men themselves, their working techniques and conditions, and the place they occupied in society. It must be stressed at the outset that in their working tools, technical procedures and way of life the artists of ancient Egypt did not greatly differ from the artisans. Woodcarvers shared the tools and techniques of carpenters and joiners; sculptors in stone drew on the skills of stone masons and stone vessel makers, artists who worked with metal learned from the experience of metal-beaters. We often see an artist at work in the craft shop specializing in his chosen medium. The work of the draughtsman and the painter, on the other hand, had a close affinity to that of the scribe. Works of art, again, did not spring from the hands of single individuals; they were invar iably the product of collective effort by a number of men. The contribution of one artist linked up with that of another, a painting or a relief being based on another man's drawing while a sculpture was passed on to the painters to be colored. It is only for descriptive convenience, then that we shall be dealing with the various specializations in terms of present-day classification. We may well start with the sculptors, as it is they whose working methods are most fully documented. In most cases we are shown a sculptor standing in front of a finished work, normally a life-size male or female figure, standing or seated, less often the lying figure of an animal. Whatever the medium, any such figure is regularly referred to in captions as Tut. Often we are shown several figures being sculpted side by side in the same workshop; in the 5th-dynasty tomb of Ty at Saqqara, for instance, there are eight in various stages of completion. The early stages, by cont... Free Essays on The Life Of Ancient Egyptians Free Essays on The Life Of Ancient Egyptians Ancient Egypt has bequeathed us an enormous testimony to the skill and genius of its artists draughtsman, painters, relief-carvers and sculptors. The coming pages testify to their creations, but here we shall focus on the men themselves, their working techniques and conditions, and the place they occupied in society. It must be stressed at the outset that in their working tools, technical procedures and way of life the artists of ancient Egypt did not greatly differ from the artisans. Woodcarvers shared the tools and techniques of carpenters and joiners; sculptors in stone drew on the skills of stone masons and stone vessel makers, artists who worked with metal learned from the experience of metal-beaters. We often see an artist at work in the craft shop specializing in his chosen medium. The work of the draughtsman and the painter, on the other hand, had a close affinity to that of the scribe. Works of art, again, did not spring from the hands of single individuals; they were invar iably the product of collective effort by a number of men. The contribution of one artist linked up with that of another, a painting or a relief being based on another man's drawing while a sculpture was passed on to the painters to be colored. It is only for descriptive convenience, then that we shall be dealing with the various specializations in terms of present-day classification. We may well start with the sculptors, as it is they whose working methods are most fully documented. In most cases we are shown a sculptor standing in front of a finished work, normally a life-size male or female figure, standing or seated, less often the lying figure of an animal. Whatever the medium, any such figure is regularly referred to in captions as Tut. Often we are shown several figures being sculpted side by side in the same workshop; in the 5th-dynasty tomb of Ty at Saqqara, for instance, there are eight in various stages of completion. The early stages, by cont...

John Piaget essays

John Piaget essays Jean Piaget developed a theory that states that children develop cognitively through four developmental stages, sensorimotor, pre-operational, concrete operational, and formal. The first stage of the cognitive development theory is called the sensorimotor stage. This stage takes place from birth until the age of two. During the sensorimotor stage the infant learns by combining their senses (sight, sound, taste, touch, smell) with their motor skills. The sensorimotor infant begins with basic reflexes, then develops the ability to use more complex manipulations of objects. The second stage of cognitive development is referred to as the pre-operational stage. The pre-operational stage takes place from the ages of two years until the age of seven years. The majority of their new learning involves the use of symbols, language, and their imagination. A child in the pre-operational stage has no sense of logic and is egocentric, they can only view the world through their own perspective The stage following pre-operational is called concrete operational. In the concrete operational stage the child is still using symbols, however; he is able to apply logic to the symbols. Children in concrete operational do not act intuitively, they are able to use reasoning - provided that there are concrete examples. The final cognitive developmental stage is called the formal operational stage. In this stage, the young adult is able to apply logic to abstract thinking. They are able to deal with complicated problems and apply reason. Piaget considered formal operational the final stage of cognitive development because it is the highest level of learning that the individual will achieve. ...

Contrastive analysis of perception verbs in English and Arabic Thesis - 1

Contrastive analysis of perception verbs in English and Arabic - Thesis Example (Mina smelled the perfume ) (active) (Meher felt a prick in his thumb) (state). (Meher felt sick). (descriptive) Tahir felt his tie (Active) . (Mazi tasted defeat) (descriptive) Lemon tastes bitter (state) (Jack tasted the warm broth) (Active) Chapter 3: Perception verbs in English 3.1  Ã‚   Introduction This chapter presents a discussion on the perception verbs and their usage in English language. It will develop an understanding of the importance and relevance of the correct forms of perception verbs to the meaning of the sentence and will also highlight the basic issues that non-native learners may face when they try to learn the language. This chapter forms an essential background for the conduction of the contrastive analysis between the Arabic and the English language perception verbs.    3.2 What are Perception Verbs Perception verbs are the verbs that define the actions undertaken by our sensory parts. These are an essential element of any languag e as these have the capacity to explain and display a diverse variety of human behavoiurs and nuances. In semantics, perception verbs have been a subject of much debate and research owing to the complexity of their usage as well as their capacity to be modified in language use. The field of perception verbs is one of the important semantic fields that received the attention of linguists since 1970s, along with other semantic fields like basic color terms (Berlin and Kay 1969), body parts (Andersen 1978), cooking verbs (Lehrer 1974), and motion verbs (Talmy 1975). However, while other subjects and aspects of language have been explored in order to assess the richness of the language or to explore the richness with which concepts can be expressed, perception verbs are of interest due to their difficulty to translate into other languages. Perception verbs relate to the active usage of language and portrat not only the perceptions, but often the emotions and the conceptions as well. Thi s makes the usage of the perception verbs complex and difficult to translate in different languages.    Also, other elements of the language like the nouns, vocabulary etc., are easy to learn as these are governed by simple rules of grammar. These semantic fields share universal elements, and exist frequently in many languages. It is a well-known fact that in order to recognize the typological shape of any language, we must be aware of â€Å"the distinctive character of its structure in relation to other languages based mainly on work in general typology, and on contrastive analysis and other types of cross linguistic studies† (Viberg, 2006, p.3). Perception verbs have also â€Å"supplied a rich field of research in linguistics including grammaticalisation, complementation and semantic change† (Ibarretxe-Antunano, 1999, p. 41).      The complexity associated with the perception verbs has its roots in the variety of modes in which perception is understood. Percept ion is a basic human process through which they are able to access external inputs and make sense of their surroundings. However, academic definition of perception is varied as different scholars tend to define perception differently. The definition of perception is essential to understand as it has a direct impact on the development and usage of the perception verbs. Sekuler and Blake defined it as â€Å"a biological process wherein the brain derives descriptions

Vulnerabilities Research Paper Example | Topics and Well Written Essays - 500 words

Vulnerabilities - Research Paper Example Certificate Authority (CA) and is considered to be the most efficient control in terms of email security (Ellison & Schneier, 2000). In case of secure email, one has to make sure about the sender possessing the key is the one who is the authentic sender. Likewise, when signed email is verified, one of the checks includes the source of the email i.e. the sender. However, if encryption is applied to the public key infrastructure, there is a requirement of identifying people possessing the relevant key to decrypt the message (Ellison & Schneier, 2000). This is the point where email certificates starts to operate, as the certificate ID is a digitally signed message from the CA that is transmitted to the user linked with the public key. However, the (PKI) possess many risks that may lead to vulnerabilities and in the end threats. One of the risks incorporates a breach of keys associated with the signer via unauthorized access or by any other means (Ellison & Schneier, 2000). However, efficient Certificate Authorities can mitigate risks by en effective physical security, personnel security and secure network. Pretty Go od Privacy ‘PGP’ counters these issues as well by incorporating ‘Web of Trust’ including self-governing signatures linked with the single certificate (Ellison & Schneier, 2000). Moreover, for addressing internal security, monitoring of employee emails is a regulatory requirement. However, there are many procedures, tasks and functions associated with it. The requirements can be met by utilizing tools from outlook express that are capable of retrieving certain keywords used in the email. For example, the keyword ‘account’ can retrieve all emails including this specific word. (Bhatnagar, 2012). However, these outlook tools only work individually on each workstation and can be solved by incorporating Microsoft Exchange server. As the server will retrieve all emails of all employees containing the specific