The Process Of Recycling Essay Example For Students

The Process Of Recycling Essay The Process Of Recycling Essay Recycling was first thought of in 1776 during the war of Independence from England. Americans recycled scrap metals to help fight the war. But it wasnt until 1895 when the first residential waste program in the U.S. was invented in New York. The chemistry behind recycling is the idea that everything circulates. For instance, if you saved a box of cereal and put it into your recycling bin, that box of cereal can be made into a package of papers, or a newspaper, or a tissue box, and the possibilities are endless. Common household items that are recycled are newspapers and paper towels, aluminum, plastic, glass soft drink containers, steel cans, and plastic laundry detergent bottles. The process of recycling can be broken down into three steps. The first step is collection and processing. In this step one would look for items to recycle, they can be found on curbsides, drop-off centers, buy-back centers, and deposit/ refund centers. We will write a custom essay on The Process Of Recycling specifically for you for only $16.38 $13.9/page Order now These items are then sorted, cleaned, and prepared into marketable commodities for manufacturing at a materials recovery facility. In the second step, the manufacturing step, the recyclables are then manufactured into new items containing either total or partial recycled content. The purchasing recycled products step is the last. This step completes the circle of recycling, where consumers but the recycled items. The whole purpose of recycling is to reuse items to reduce the amount of waste in the environment. It helps the environment because it minimizes the amount of waste, there will be less space taken up by garbage dumps and the environment will be generally cleaner. One way of testing the recycling process is to make sure the recycled environmental testing solvents will be as pure as the new solvent. Contaminating solvents and analytes are removed in the solvent recycling process. However there are a few problems with the recycling process. One is that it takes too long to sort and dump the items, and this usually means a loss of finances somewhere because someone has to be paid for all the time it takes to sort the items. A second problem is that in order to recycle items, they must be dry. Paper cannot get wet because people will not want to deal with it. Also, people will be less likely to dump aluminum cans that still have liquid in them. Finally, a third problem with recycling is that there needs to be a convenient location for the recycling bins, as well as recycling dumpsters, the space taken up could mean less parking spaces. In the future recycling will improve by reducing even more waste by increasing use of lighter gauge materials, which offer significant energy and cost saving with no sacrifice or strength or performance. Sources http://www.taormina.com/mrfrcyhis. html http://www.recover.com/mat_recyc_proc.html http://www.afn.org/afn21661/Problems. htm http://www.brinstrument.com/fractional-distillation/enviro-solvent-recycling.html http://www.sheildsbag.com/pg5. htm .

The Life of Powhatan Indian Pocahontas

The Life of Powhatan Indian Pocahontas Birth: c.1594, Virginia Region Death: March 21, 1617, Gravesend, England Names: Pocahontas was a nickname meaning playful or naughty one. Here real name was MatoakaAfter her conversion to Christianity and baptism, Pocahontas was given the name Rebecca and became Lady Rebecca when she married John Rolfe. Pocohontas and John Smith: When Pocahontas was approximately 13 years old in 1607, she met John Smith of Jamestown, Virginia. They met in her fathers village which was called Werowocomoco on the north shore of what is now the York River. A tale often associated with Smith and Pocahontas is that she saved him from death by appealing to her father. However, this cannot be proven. In fact, the incident was not recorded until Pocahontas was traveling in London many years later. However, she did help the starving inhabitants of Jamestown during the winter of 1607-1608. First Marriage: Pocahontas was married between 1609 and 1612 to a Powhatan named Kocoum. It is believed that she might have had a baby girl who later died from this marriage. However, little more is known about this relationship. The Capture of Pocahontas: In 1612, the Powhatan Indians and the English settlers were becoming more hostile with each other. Eight Englishmen had been captured. In retaliation, Captain Samuel Argall captured Pocahontas. It was during this time that Pocahontas met and married John Rolfe who is credited with planting and selling the first tobacco crop in America. Lady Rebecca Rolfe: It is not known whether Pocahontas actually fell in love with Rolfe before they married. Some conjecture that their marriage was one condition of her release from captivity. Pocahontas converted to Christianity and was baptized Rebecca. She then married Rolfe on April 5, 1614. Powhatan gave his consent and presented Rolfe with a large piece of land. This marriage brought peace between the Powhatans and English until Chief Powhatans death in 1618. Thomas Rolfe Born: Pocahontas gave birth to Thomas Rolfe on January 30, 1615. Soon after, she along with her family and her sister Matchanna and her husband traveled to London. She was well received by the English. While in England she met back up with John Smith. Illness and Death: Rolfe and Pocahontas had decided to return to America in March 1616. However, Pocahontas got sick and soon thereafter died on March 21, 1616. She was only 22 years old. There is not real evidence to the cause of her death. She died in Gravesend, England, but the site of her death was destroyed years later when the church where she was buried was being rebuilt. Her son, Thomas, remained in England even though John Rolfe did return to America after her death. Many claim to be descendants of Pocahontas through Thomas including Nancy Reagan, Edith Wilson, and Thomas Jefferson Randolph, grandson to Thomas Jefferson. References: Ciment, James. Colonial America. Armonk, NY: M.E. Sharpe, 2006.

Chemistry Abbreviations Starting With the Letter S

Chemistry Abbreviations Starting With the Letter S Chemistry abbreviations and acronyms are common in all fields of science. This collection offers common abbreviations and acronyms beginning with the letter S used in chemistry and chemical engineering. S - Entropys - secondsS - Sulfurs - solids - spin quantum numberSA - Salicylic AcidSA - Surface AreaSAC - S-Allyl CysteineSAC - Strong Acid Cationsal - salt (Latin)SAM - S-Adenosyl MethionineSAM - Spin Angular MomentumSAN - Styrene-AcryloNitrileSAP - Super Absorbant PolymerSAQ - Soluble AnthraQunoneSAS - Small Angle ScatteringSATP - Standard Ambient Temperature and PressureSb - AntimonySB - Solvent BasedSBA - Strong Base AnionSBC - Styrene Butadiene CopolymerSBR - Sequencing Batch ReactorSBS - Styrene Butadiene StyreneSc - ScandiumSC - Silicon CarbideSCBA - Specific Chemical and Biologic AgentsSCC - Stress Corrosion CrackingSci - ScienceSCO - Super Charged OxygenSCS - Single Crystal SiliconSCU - Scoville UnitsSCVF - Single Chamber Vacuum FurnaceSCW - Super Critical WaterSCX - Strong Cation eXchangerSDMS - Scientific Data Management SystemSDV - Shut Down ValveSDW - Spin Density WaveSE - Sample ErrorSe - SeleniumSec - SecondsSCN - ThiocyanateSEP - SeparateSEU - Slightly Enriched Uraniu mSF - Safety FactorSF - Significant FiguresSFC - Supercritical Fluid ChromatographySFPM - Suspended Fine Particulate MatterSg - SeaborgiumSG - Specific GravitySG - Spheroidal GraphiteSH - Thiol functional groupSHE - Standard Hydrogen ElectrodeSHF - Super High FrequencySHC - Synthetic HydroCarbonSi - SiliconSI units - Systà ¨me international dunità ©s (International System of Units)SL - Sea LevelSL - Short-LivedSLI - Solid-Liquid InterfaceSLP - Sea Level PressureSm - SamariumSM - Semi-MetalSM - Standard ModelSMILES - Simplified Molecular Input Line Entry SystemSN - Sodium NitrateSn - TinSNAP S-Nitroso-N-AcetylPenicillamineSNP - Single-Nucleotide Polymorphismsp - hybrid orbital between s and p orbitalsSP - Solubility ProductSp - SpecialSP - Starting PointSPDF - atomic electron orbital namesSQ - squaredSr - StrontiumSS - Solid SolutionSS - Stainless SteelSSP - Steady-State PlasmaSTEL - Short Term Exposure LimitSTP - Standard Temperature and PressureSTM - Scanning Tunneling Microscop eSUS - SUSpension

Japans Expansionism in Asia Research Paper Example | Topics and Well Written Essays - 2500 words

Japans Expansionism in Asia - Research Paper Example Poring over Japan’s adversarial history in the late 19th and first half of the 20th century it is easily discernible that the sole incentive for the nation’s aggressive expansionism policy was its unquenchable thirst for natural resources. Japan’s seemingly interminable drive to conquer Asian colonies was clearly spurred by its three nationalistic campaigns namely, modernization, industrialization and an imperialistic militarism, which required an infinite source of natural resources to succeed. Late in the 19th century, Japan which was undergoing rapid industrialization and modernization realized that it needed to simulate Western nations to achieve significant success in its developing mainland1. The nation required a blend of two key drivers of Western economies to surge its economic aspirations; technology and capitalism. However, for Japan with its limited natural resources, capitalism dictated colonialism in order to furnish its needs for raw materials2. The country was further influenced into an imperialistic stance by its relatively hostile neighborhood featuring Russia and China and its inherent vulnerability considering its location3. The nation thus had no choice but to adopt an antagonistic policy for its neighbors. This policy dictated that the nation had to establish a palpable military to establish itself as one of the powers in Asia if not the sole power. The Japanese military evolved at a rapid pace just like its industries and added its materials’ demands to the already choked Japanese natural resource needs.

Explanation essay Example | Topics and Well Written Essays - 1250 words

Explanation - Essay Example These simplistic definitions of lying suggest that lying is a part of the communication process; lying is originated by the information sender; lying targets the information recipient, but there are no indications of the causes of lying (the reasons of lying). Researchers have long studied the characteristics of lying, but what is most important is to trace the reasons for lying; in essence to understand why people lie. This paper focuses on three propositions for the reasons for lying: lying as a product of an individual’s intention to withhold truthful information in order to deceive others, lying as an intention to prevent others from ‘injury’ or harm and lying as an unconscious practice where the individual who lies is not aware of lying. Lying often occurs in the communication process between individuals when one of the individuals has an interest in deceiving the other. It is very common that people will tell lies in order to produce false assumptions or false beliefs in their friends, families, peers or anyone with whom they communicate. According to Carson, this is the first and most important reason for lying, because individuals have in their nature the tendency to compete with each other, and thus lying can provide a relatively better position to one person against the other (48). Paul Faulkner, in his journal What Is Wrong with Lying, agrees with the view of Carson, and states that one of the most common reasons for lying is to make the others believe that what they are told is true while in fact it is false (536). Lying under the intention to deceive the listener can be viewed from different perspectives; lying to make the other person view a subject or an issue just like the person who is lying or lying in order to avoid the other person’s realization of the truth. For example, a child may lie to his or her parents in order to avoid

Overview of Vagus Nerve Stimulation

Overview of Vagus Nerve Stimulation The vagus nerve is one of 12 cranial nerves that pass information to and from the brain. The vagus nerve is the longest of the cranial nerves, with connections to the brain and many of the organs of the body. Intermittent electrical stimulation of the vagus nerve seems to reduce or prevent seizures. Vagus nerve stimulation involves a surgical procedure to implant an electrical pulse generator in the chest and attach electrodes to the vagus nerve in the neck. A pulse generator is similar to a pacemaker. It isabout the size of a pocket watch and weighs about 25 grams (g). How does vagus nerve stimulation work? The pulse generatoris surgically implanted in the chest just under the skin. This generator is programmed to intermittently transmit small electrical signals via a wire to the vagus nerve in the neck. We do not understand why electrical stimulation of the vagus nerve is effective at preventing seizures. It may be related to changes in the brainstem and thalamus, or the electrical stimulation may intercept the abnormal brain activity associated with seizures. The generator functions automatically 24 hours a day. An external programming wand and software are used by the doctor, to read and alter the stimulation strength and frequency. After the generator is first implanted, the usual starting settings are 30 seconds of stimulation every 5 minutes. The strength of the electrical signal usually starts at 0.25 or 0.5 milliamperes (mA) and is then increased every few months by 0.25 mA. The frequency of the stimulation can also be adjusted, to come on and off more frequently. Patients are also given a magnet, which acts as a switch for the generator. When a patient senses the beginning of a seizure, she can pass the magnet over the pulse generator to deliver extra stimulation. For some people, this extra stimulation can stop a seizure from progressing, shorten a seizure, or reduce the intensity of the seizure. The magnet can also be used to turn the stimulator off temporarily. The battery life of the generator is about six years, after which the device can be replaced. This will require another surgical procedure, similar to the first2. What and who is vagus nerve stimulation best used for? Vagus nerve stimulation has been used to treat partial and generalized seizures in both adults and children. It is considered in the following cases: Anti-epileptic medication does not control seizures effectively. The child is not a good candidate for brain surgery, either because of high risk or because he has various epileptogenic (seizure-generating) areas in his brain. The child is large enough to support the implant. This is usually decided by the neurologist and surgeon. Vagus nerve stimulation should not be used in children with certain cardiac, respiratory, or gastrointestinal problems. The vagus nerve serves the heart, lungs, and stomach, and some existing problems in these areas may lead to complications with vagus nerve stimulation. Vagus nerve stimulation usually reduces seizures but does not often eliminate them completely. Usually it is used together with medication. Use in the Pediatric Population A large group of patients with intractable epilepsy are younger than 12 years, including children with Lennox-Gastaut syndrome, Dravet syndrome, and other difficult-to-treat epileptic conditions. Morris and colleagues[3]recently provided an evidence-based guideline for VNS in children that is based on a review of off-label use. In 13 class 3 studies involving 470 children with partial or generalized epilepsy, 55% had > 50% seizure reduction with VNS. Similarly, in 4 class III studies of 113 children with Lennox-Gastaut syndrome, 55% had > 50% seizure reduction. Mood studies were not available for children. (In 2 class 3 studies of 31 adults with epilepsy, significant improvements in standard mood scales were observed.) Children were 3.4 times more likely than adults to develop an infection at the VNS implantation site. What is the procedure? A medical evaluation is necessary to determine if this is a case that may be successfully treated with vagus nerve stimulation. Once it has been decided that your child may be helped by vagus nerve stimulation, the surgeon, anaesthetist, and others on the medical team will explain the procedure to you in detail. Its important that you understand the procedure, its risks, and your childs future care; feel free to ask them any questions you may have. With the help of the treatment team, you should then explain the procedure to your child and help him understand what to expect after the implantation. Your child will need to be admitted into the hospital to install the device. Your child will probably need to be put to sleep under general anaesthetic, and therefore will need to stop eating eight hours before. The operation can be done with a local anaesthetic, but because it is hard for children to stay still, most require a general anaesthetic. The procedure itself takes about one hour. One cut about 5 cm long is made on the left chest wall to implant the pulse generator. Another cut about 5 cm long is made in the neck, through which flexible platinum electrodes are attached to the vagus nerve. Because the vagus nerve also goes to the heart, the generator will be turned on in the operating room so that the surgeon can make sure the device does not interfere with the heart. For the same reason, the electrodes are almost always placed on the left vagus nerve, which has less critical influence on the heart. Your child may be sent home on the same day or kept overnight for observation. You and your child will be taught how to care for the incisions before discharge1. Using vagus nerve stimulation After the pulse generator is implanted, the doctor will start the stimulation, using a wand attached to a laptop computer. The doctor will begin with a low dose of current, given for 30 seconds every five minutes. The strength and duration of the stimulation will be slowly increased, at subsequent doctor visits, to achieve optimum seizure control. The stimulation is delivered automatically, 24 hours a day. Your child will also be given a special magnet for use with the pulse generator. Children who experience auras (a feeling that signals the onset of a seizure) can use the magnet to give an extra burst of stimulation, which may reduce or eliminate an imminent seizure. You can also use the magnet if you see that your child is about to have a seizure. The magnet can also be used to turn off the pulse generator temporarily and to check its operation. The doctor will make sure that you and your child understand how to use the magnet before you leave the hospital. Your child will need to continue taking his medications. The dosage will be kept constant for several months while the generators output current is slowly increased. Once the current has been increased to its optimal level, your childs doctor will consider reducing medication and will discuss a new schedule with you. The benefits of VNS seem to increase over time. In one study:1 After 3 months, the number of seizures decreased by about one-third. After 12 months, the number of seizures decreased by about half. And in 2 out of 10 people, the number of seizures decreased by about three-fourths. For people who can sense when they are about to have a seizure, turning on the VNS using their hand-held magnet can sometimes prevent the seizure. It may also shorten a seizure already in progress. Studies show that VNS may also be effective in children. VNS improved independence, mood, and learning in some children3. What to Expect After Surgery The generator may be turned on the day following the surgery or at the first post-surgical visit. Your child will be reassessed in seven to 10 days for a wound check, and the generator may be turned on or adjusted.Parents will be shown how to use a magnet to control a seizure. Waving the magnet over the generator may stop or shorten a seizure. Children who are implanted with a VNS usually return home the same day following their surgery. Sometimes a hospital stay of one night is necessary2. Regular monitoring Regular monitoring is required to check the generator and battery and to make sure the treatment is working well and is not uncomfortable. The battery life of the generator is about six years, after which the device may be replaced. This will require another surgical procedure, similar to the first Risks The vagus nerve stimulator is considered safe. Mild side effects occur in some people when the device stimulates the nerve. The most common side effects include: Coughing. Throat pain. Hoarseness or slight voice changes. Shortness of breath. In children, vagus nerve stimulation may cause increased hyperactivity2. Conclusion For more than 15 years, VNS has proven a useful adjunct to pharmaceutical therapy in adults and children with intractable epilepsy. In an evidence-based guideline, Morris and colleaguesconcluded that VNS may be considered for treatment of seizures in children with epilepsy, including those with Lennox-Gastaut syndrome (level C). Improvements in mood, as well as a sense of control over seizures provided by the magnet, may be added benefits. Adverse events, such as postimplant infection and lead fracture, may occur more often in children than in adults1. As with many pediatric therapies, VNS is not FDA-approved for children. Nonetheless, VNS represents a potentially effective and nonsedating treatment option and should be considered for children with intractable epilepsy. Referances Andrew N,Vagus nerve stimulation for children;Medscape neurology,November 2013.http://www.medscape.com/viewarticle/813917_3 Buchhalter JR, Jarrar RG (2003). Therapeutics in pediatric epilepsy, part 2: Epilepsy surgery and vagus nerve stimulation.Mayo Clinic Proceedings, 78(3): 371–378 Schachter SC (2002). Vagus nerve stimulation therapy summary: Five years after FDA approval.Neurology, 59(6, Suppl 4): S15–S20.

Genetically Modified Food Speech Essay

Attention Material :How awesome would it be if your pet glowed in the dark? Or your family had a zebra-dog? How about a family dog that could take out the entire neighborhood in one lick? Now how about owning this dairy cow? Looks normal but its not. All these animals have been genetically modified and their genes have been altered. The cow is injected with a growth hormone rBGH to increase it’s milk production, only problem, that hormone has been found to cause different types of cancers as well as a number of other health hazards. This hormone has been banned in Canada and Europe but sadly in American this hormone linked to 3-4x higher cancer rates was approved by the FDA in 1993 after the consumer tested it for 90 days on 30 rats. Today, we are seeing the long-term affects of drinking this potent milk. Before the genetically modified food explosion only 1:11 individuals had cancer, today 1:2 men and 1:3 woman will develop cancer and nearly half of you can expect it in your lifetime. Today 2/3rds of all foods in your local grocery store are GM and in 2013 it will have raised to 90%. The problem here is that GM foods are hardly ever tested before consumed, they have a number of associated health problems and they are not labeled so you cant pick to not eat them or not. Credibility Material: I have always been interested in GM organisms but a few years ago my professor at IU intreguied me with the effects of GM foods. Today, I’ve done countless hours of research on the subject and wrote many papers about it. Thesis Statement: Today I want to inform about GM foods Preview: Today I want to inform you about GM foods, what they are and why we should push for labeling of GM foods in our grocery. Transition: To begin, allow me to inform you about GM foods. BODY I. GM foods are everywhere but what are they? Are they good, bad, or okay? Should I eat them or should I not? A. Genetically Modified (GM) foods are food items that have had their DNA changed or altered entirely through genetic engineering creating completely different variants. 1. GM products include medicines and vaccines, foods and food ingredients, feeds and fibers. B. GM foods first appeared on the marked in 1990 C. Between 1997-1999 GM food ingredients suddenly appeared in 2/3rds of all U. S. processed foods 1. If you consumed soy sauce with Chinese, popcorn at movie or occasional candy bar you’ve undoubtfully consumed this new food. a. Nearly every American has eaten GM foods but only 26% believe they have. b. No labeling and no regulation 2. â€Å"Potentially, GM could breed new animal and plant diseases, news sources of caner and novel epidemics in human health†, Dr. Wald, Prof of Biology at Harvard University. Transistion: Now that we know what GM foods are, lets discuss the health concerns associated with them. II. There are extensive health hazards that have been shown to be caused by modified foods. A. Study done in 1999 showed GM foods have decreased levels of vital nutrients- esp. those that protect us from heart disease and cancer. B. Modified proteins exist in GM foods, new proteins never before eaten by humanity. 1. Foreign GM ingredients produce allergies a. 25% of Americans have mild adverse RXNs to foods and at lease 4% have life threatening allergies to food. b. Soy allergies have doubled since GM soy introduced. â€Å"c. No labeling of GMO in foods and people experience allergies they were unaware of-Anaphylatic shock 2. In last decade, percent of children in U. S. affected by serious food allergies has significantly increased. a. Today 6-8% children under 3 yrs old affected. C. As we ingest transgenic human/animal products there is no real the impact of human evolution. 1. Research mice show increase in birth defects and shorter life spans when feed GM soy. a. Mothers feed GM soy- nearly all babies died (10% died in control) b. Males developed changed testicle color. c. Infertility when feed GM corn. 2. Other animal studies indicate serious health risk associated with GM foods; fertility, immune problems, accelerated aging, insulin regression, changes in major organs and gastroninteitinal region. a. There are more than casual associations between GM foods and adverse health affects b. Confirmed in animal studies-consitancy and association between GM foods and disease 3. Number of autoimmune diseases are enhanced by foreign DNA fragments not fully digested in stomach and intestines a. DNA fragments are abundant in bloodstream. b. Potentially mix with normal DNA. Transition: Considering these factors about GM foods, let me explain why I think it is so very important that these GM crops be labeled. III. In other countries, GM crops are almost always labeled but in the U. S. no GM foods are labeled. A. Unlabeled GM foods can cause serious health problems for those with allergens to it. 1. Most people by a tomato and aren’t worried about their soy allergy but with GM foods and ingredients, soy genes can easily be placed or accidently cross pollunant 2. Many unlabeled GMO’s in our food are causing people to experience allergies they were unaware of- a. It’s possible that they can go into anaphylactic shock. b. DEATH. B. There are no regulated health safety tests. 1. FDA only requests that firms conduct their own test of new GM products a. FDA makes no reviews of those tests. b. No long term effects of eating GM foods. 2. Louis Pribly, an FDA microbiologist explains, â€Å"Companies tailor tests to get the results they need. † C. Why labeling and what you can do. 1. Choose hormone-free beef and rBGH-free Dairy products a. Foods that carry â€Å"USDA-certified organic† label contain no artifical hormones. 2. Lack of labeling of GM foods violates the 1st Amendment of the Constitution, â€Å"Food, Drug, and Cosmetic Act requires added substances to be labeled. † a. Without labels, our public health agencies are powerless to trace problems of any kind back to their original source b. Crisis? c. Why do you think labeling hasn’t occurred yet? Because, the manufacters of GM crops would lose buisness. Would you buy GM foods if you had a choice? Probably not. CONCLUSION Summary Statement:In conclusion, I hope that everyone gained some knowledge towards the effects of genetically modified foods and why it needs to be taken more seriously when involving peoples health. Concluding Statement:â€Å"Its like playing Russian roulette (referring to the lack of testing done on GM foods) with public health, We have became involuntarily guinea pigs in vast genetic experiences,† Louis Pribyl, FDA microbiologist. Be a Voice, Sign a petition for GMO’s labeled in our foods, get the knowledge & protect your future generations. Sign The World Science open letter to all governments calling for GMO’s to be properly labeled in our foods. Who wants to become sick from food they eat? We have the right as Americans to know what is put in our food. Don’t We? Work Cited Works Cited Admin. (2010, Apr 29). GM. org. Retrieved Feb 24, 2011, from Genetically Modified Foods: http://www. gm. org/category/gm-foods/ Batalion, N. (n. d. ). Genetically Modified Food. Retrieved Feb 22, 2011, from Raw-Wisdom. com: http://www. raw-wisdom. com/50harmful. Boston University College of Engineering. (2010, Feb. 12). Low Levels of Antibiotics Cause Multidrug Resistace in ‘Superbugs’. Retrieved Dec. 5, 2010, from Science Daily: http://www. sciencedaily. com/releases/2010/02/100211151647. htm GMO Dangers. (2010). Retrieved Feb 24, 2011, from Institute For Responsible Technology: http://www. responsibletechnology. org/ The National Agricultural Library. (n. d. ). (USDA) Retrieved Feb 22, 2011, from United States Department of Agriculture: http://www. nal. usda. gov/.