Developing an Opacity Sensor :: Opacity Sensors Technology Essays

Developing an Opacity Sensor There is a huge range of different sensors in this world, designed to detect changes in temperature, size, distance and many other important factors. Their ability to do this makes them valuable for use in industry, in particular, production processes. I have chosen to develop a sensor which measures the concentration of solution, suitable for the factory production of pre-diluted fruit squashes. The sensor can control the machinery via a servo-mechanism, indicating whether more squash needs to be added. The context in which my sensor is to be used is an important consideration as it determines a suitable sensitivity and resolution. Factors to consider when designing a sensor: Sensitivity The ratio of change of output to change of input. A very sensitive sensor will give a big change of output for a small change of input. A sensor which detects very small changes of input will need to be very sensitive so these changes can be observed. Resolution The smallest change the sensor can detect in the quantity it is measuring. If you had a quantity which was displayed as 0.0076, this sensor would have quite a high resolution (depending on what it was measuring). If the last digit were fluctuating this would be the maximum resolution of the sensor as it can only just resolve a change of that magnitude – 10,000th. A cooks oven may only need a resolution of 5 ºC whereas a baby monitoring system requires a resolution of 0.5 – 1 ºC. Response time The time a sensor takes to respond to a change in input. If changes occur more rapidly than this then they will usually be averaged out. The response time should be suitable to detect important changes as they occur. Systematic Most sensors are affected by changes in temperature, even those that aren’t designed to detect them. Some sensors may also be affected by other environmental changes depending on their methods of detection, for example a LDR might produce different readings on a sunny day if the whole system isn’t enclosed. Such influences will produce readings that display the correct trend but each reading is erroneous by the same amount. For this reason systematic errors are difficult to detect and an only by making another more accurate measurement. Today â€Å"smart systems† process information to compensate for disturbing influences. Noise, random error, fluctuations The input signal may fluctuate or the sensor itself may generate noise. Unsystematic variations are present in all experimental data and their size determines the reliability of the data and limits the precision with which a measurement can be made. Taking an average over repeated measurements can improve the final result

My Thoughts About “Do You Speak American?”

After watching this video, I asked myself â€Å"Do I speak American? † Absolutely, the answer was no. In the past, I thought American English was only a language which pronounced â€Å"r† heavily. Surprisingly, according to the map of dialect, America can be divided by seven parts. They are Eastern New English, NYC,Philadelphia, The North, The Midland, The South and The West. And different regions of America have different dialects. In terms of the dialect of American English, I have a re-understanding of this language. I find it is interesting, even surprising, and I am more curious about that.The dialects of American English is really interesting. Honestly, when I hear a conversation or a speech, I can hardly recognize the accents without special note, although sometimes I can recognize the obvious accents according to the meaning of the sentence. For example, most young California say [? ] to replace [? ], say â€Å"like† as â€Å"lake†. According to my personal experience, when I traveled to Miami, Florida, I heard that most people in there said â€Å"lift† as â€Å"left†. Moreover, Net English used among young people is another part of interest.For example, â€Å"das kool† equals â€Å"that is cool†, â€Å"lol† means â€Å"laugh out loud†, â€Å"How ya doin hun† is â€Å"how are you doing honey? †, â€Å"g2g† means â€Å"got to go†, etc. Maybe they think typing English in this way is more convenient and fashionable, however, I do not think so. Furthermore, experts recommend that TV series is a good way to recognize and learn dialects since the actors of a program are come from different regions. At last, teenagers prefer to use some new words of phrases to express an common meaning, such as â€Å"bling bling† refers to expensive jewelry.This is popular and sometimes I also use that to express myself. Actually, I am surprised about the dialects of Americ an English in the following aspects. Firstly, in North America, people will laugh at lobsterman’s dialect and make fun with the way they speak. As far as I am concerned, we should respect different languages and cultures. Even though we cannot understand the way of communication, every dialect must has its own value to exist. Moreover, although people dislike some dialects, they can always imitate those dialects they hate. It is unbelievable.In addition, I watched these three DVDs without subtitle. So when I watched the CD2 which introduced the dialects in the mid-land, I found it was difficult for me to understand what people said. However, it is easier to understand what the north and west people said. I think it means that the people of mid-land and south have strong accents. Frankly, there are some points that I do not know before I watching this video. First of all, Philadelphia shakes the American speech more than any other city. Secondly, the Black and the White cannot communicate with each other by using English at the beginning.Thirdly, some people who come from the mid-land consider New Yorker speak bad English, since New Yorker say â€Å"water† as â€Å"[w? :d? ]†. To be honest, as for me, I like the dialect of New York. Fourthly, some pronounciation of dialect are totally different from the original pronounciation. For example, in Ohio and Michigan, â€Å"yins† means â€Å"you†, and in north, â€Å"ayuh† is equal to â€Å"yes†, etc. Finally, looking at magazines to find new words is a job, its purpose is to update the dictionary. To sum up, I don’t think I am speaking American even though I am in New York now.The dialects in United States are diverse. In my opinion, dialect is a component of cultural activities. And some dialects are related to history, some are related to the life style of different region. There are a variety of expressions for dialects. Those include the differences of pron ounciation, the new words for common meaning, net English, etc. Most important, no matter what kind of language we say, we should respect all of them and admit the existence value of them. At last, I think watching different American TV series is a good way for me to improve my American English.

Should Public Service Mandatory For Graduation Requirement

ontinuous debate that is currently receiving much attention nationwide is whether the education system should make community service mandatory for graduation requirement. Preparing students to effectively function in the real world is an important aspect of our education system. Today more than ever, there is an emphasis on having experience before beginning work. Most jobs are now focused on looking past your resume to see what you have given back to the community. Nevertheless, it is important that schools focus on preparing college students for the work force by mandating that they receive all of the necessary exposure and experience. Schools nationwide are demanding that students must complete a required amount of community service hours in order to graduate. In Maryland, high school students are required to complete a minimum of 75 hours of service in order to graduate. While the opponents feel that it takes away valuable time from students who need to focus on their education. I believe that gaining experience outside of school is critical for future success in life. To ensure that students are prepared to transition smoothly from school to work, they need to be involved with the community while in school in order to build the leadership skills that are necessary to succeed. Advocates for mandatory community service say that it nurtures students and prepares them for future jobs in which leadership skills are valued. This also opens a marketing network for students toShow MoreRelatedResponsibility Essay1629 Words   |  7 Pagesget degrees, and have a life, its true of enough of them that the stereotype does prove itself true quite often. This is the problem that Dave Eggers postulates a way of solving in his essay Serve Or Fail. Eggers idea of making public service volunteering a mandatory part of your college education is brilliant and would no doubt aid in many areas of College students lives. 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Teachers and students treat education with the idea of â€Å"just passing† rather than graduation with honors. The government is leaving more kids behind today than ever before, with their constant demand for improvement of tests scores and increased graduation rates leads to unrealistic goals forcing teachers to teach the test and abandoned their own curriculum. State governments selling what will be taught as this year’sRead MorePotential Collaborators And Its Effects On Campus Health Clinics1582 Words   |  7 PagesCOLLABORATORS Potential collaborators in our campaign include on-campus health clinics, El Paso public health clinics, the Texas DSHS, hospitals and medical treatment facilities, and school and local government policy makers. The various health clinic and medical personnel will be a vital part of this campaign as they will be the professionals responsible for the administration, testing, reporting and counseling services necessary to accomplish our mission. 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