Astonomy and Cosmology Unit Final Essay - 537 Words

Astronomy and Cosmology have always been an interesting subjects for me since I was little. The two units before this unit were somewhat new to me but weren’t filled with a colossal amount of information. When we arrived at this unit I thought it would be a review of what I had already knew about space, but really it was much more than just planets and stars. My knowledge and view of the universe has drastically changed after learning about various concepts like the Main Sequence, Cosmic Microwave Blackbody Radiation, and red or blue shifts. From this i’ve learned that what is happening here on Earth is nothing compared to what is happening to what is happening in the far reaches of space. There is so much going on in our universe and it†¦show more content†¦Concepts that were new to me included the Main Sequence for stars, the concept of black holes losing mass, redshifts, and the timeline of the Big Bang. I had a basic understanding of black holes and galaxie s but after I learned that there a 2 types of galaxies(spiral and elliptical) and how in the center of a black hole is a singularity where all of the laws of physics break down because everything is so extreme. When learning about the galaxies I found the pictures as well as the descriptions to be very beautiful. Whether it was a spiral galaxy that is colliding with another spiral galaxy or the orange tinted elliptical galaxies, I found it all to be complete eye candy. Even though the images are computer enhanced to make the picture glow, i still find it crazy that there is so much natural beauty that still hasn’t been discovered and can only be seen by telescopes that get a faint image. One question I still have is about the cosmological principle, if there is no center for expansion, but the big bang started at a single point, so doesn’t that mean that the universe has been expanding from that one point this entire time? In conclusion this unit on astronomy and cosmo logy helped me understand that there is so much more to the universe than I had initially thought. There is so much more that goes on and our knowledge will only increase as technology makes our ability to learn more about the depths of our

Essay about Physics of the Eyes - 1171 Words

Protections of the eye: The human eye is one of the most important things to a person and thus has many forms of protection. The eyelid protects the eye in three different ways: the eyelashes, the glands, and the movement of the eyelids. The eyelashes are beneficial in keeping dust and debris out of the eye. Touching the lashes will trigger the reflexive blinking mechanism. There are many different glands that are located in the eye. The Zeis gland is a gland that secretes oil. An infection in this gland results in a stye. A second gland, the Meibomian gland, are large oil secreting glands located in the lid of the eye and play a part in producing the oily outer layer of tears. This oily layer prevents the evaporation of tears.†¦show more content†¦* Descernets membrane This layer is simply secretory products from the endothedlium. * the endothedlium The innermost layer of the eye is a single layer of cells that are lined up against Descemets membrane. The quality and quantity of these cells decrease over time and cannot be replaced. When one cell dies, the rest of the cells enlarge to keep the same distance covered. The Iris and Pupil: The most commonly known parts of the eye are the iris and the pupil. The iris is made of connective tissue and muscle that contains a hole in the midst of them. The iris is the part of the eye that is colored, either brown, green, blue, hazel, etc. The color is a result of the amount of pigment that is found in the eye, brown eyes have a lot of pigment, and light eyes, such as blue, have little pigment. The pupil is the hole in the eye that allows light to reach the retina. The pupil widens in a darker room to allow more light in, and narrows when in the light to restrict the amount of light to reach the retina. The pupil is adjusted by the iris muscles. The Lens: The lens is located in front of the iris. It is an elastic body, it stretches and returns to its former place. It is biconvex, and almost transparent. Directly in front of the lens is the aqueous, and directly behind it, the vitreous. The lens is one of the items in a persons body that deteriates with age, like many other bodyShow MoreRelated Physics of the Human Eye Essay2076 Words   |  9 PagesPhysics of the human eye. The human eye, what a complex but fascinating organ. It has the ability to see past the horizon and observe the different colors of a rainbow. The eye can be quicker then a race car but slow enough to witness a snail crawling across a beach. The eye can capture objects at various different angles, such as birds flying overhead or a person walking right beside you. Yes indeed, the eye is probably the greatest sense a person can have. The eye is so vast and complex. ToRead MoreEssay on Physics in Everyday Life1684 Words   |  7 PagesPhysics in Everyday Life 1 Just about everything you do from moving to eating to listening to music involves physics. 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HIV in Singapore Free Essays

To extend the impact of our effort to curb the spread of HIV, we propose to continue and improve on our outreach effort targeted at the Chinese speaking Geylang crowd, and to initiate a campaign targeted at youths. The main objective of both efforts would be to encourage condom use and promote HIV testing as means to prevent the spread of HIV. On top of having both campaigns, we would like to propose making HIV testing more convenient by assisting with the implementation of a Mobile HIV Testing Van (MTV) service. We will write a custom essay sample on HIV in Singapore or any similar topic only for you Order Now Continuing and Improving Current Efforts to Reach Out to the Chinese Speaking Geylang Crowd 1. Printing more Pamphlets Having conducted an outreach event at Geylang, we found that the majority of our target audience read the educational pamphlet, and did so with a certain measure of contemplation – an indication of their rational riders being influenced by facts such as the ability to prolong one’s life if early treatment for HIV is sought, the benefits of condom usage and where the HIV test can be taken. Due to the limited number of pamphlets printed thus far, we foresee that more will be needed for future outreach events. Thus, we propose to have part of the budget allocated for this purpose. 2. Printing of Taglines Encouraging Condom Usage on Condom Covers. Redesigning the box used to contain condoms for distribution. Our group conceived a series of short, catchy taglines to encourage condom use. Condom covers with these taglines could be produced and distributed during outreach events. The taglines conceived were meant to direct our audience’s emotional elephants by evoking positive feelings about condom use – by asserting that love making can be equally pleasurable even when condoms are worn. To further engage our audience’s emotional elephants, we propose that an effort be made to conceive suitably ‘hard’ messages evoking anxiety and fear by highlighting the risks of doing away with condoms. Some of these ‘hard’ taglines could put across the message an underestimation of the one’s chances of contracting HIV is a contributing factor leading to HIV infection. By focusing attention on this ‘black swan’ in HIV being closer to home than it is often thought to be, our target audience may be encouraged to use condoms. These ‘hard’ messages could then be similarly printed on condom covers and distributed during outreach events together with those having ‘soft’ taglines, thus producing a carrot and stick effect that could further improve our effort to encourage condom usage. Also, the boxes used to store condoms could be changed to make it less obvious that it contains condoms, as it currently is. The purpose of doing so would be to encourage the taking up of these condoms, as regardless of whether those approached are seeking paid sex or not, they may nonetheless avoid accepting the condoms altogether because they do not wish to be seen in public as having done so, as evidenced when approaching some members of the public. To overcome such reluctance, the condoms (with the taglines printed on their covers) could be packed into larger rectangular top opening boxes such as those containing sweets (like how the sweet Ricola is packaged), with plain messages such ‘specially for you’ as that would serve to mask the true contents of the package. 3. Associating Condom Use and Regular HIV Testing with Responsible Behaviour In addition to distributing condoms and educational pamphlets, we propose to utilise the behaviour changing effects of social identity promotion to encourage condom usage and regular HIV testing. Posters juxtaposing images of Chinese males, representing all adult age groups, with condom use messages and them going for regular HIV testing could be printed and put up at places where our target audience often congregate – lanes leading to coffee shops and eateries along Geylang. These posters would portray these males as being socially responsible. As most would not wish to be labelled as irresponsible, the effects of projecting such an image could serve to encourage condom use and regular HIV testing. This effort to create such a social identity could be made more effective if a greater number of older volunteers (over 40s) are involved in such outreach events. These older volunteers could serve as leading lights of their age group and potentially relate better with our target audience, since both could see each other as peers. As there is a lack of volunteers belonging to this age group, we propose that an effort be made to seek such volunteers. One way we could do so would be to seek volunteers from grassroots organisations such as community clubs and public housing residents committees (RCs), since these bodies consist of people with an existing spirit of volunteerism and mainly belong to this age group. Extending our Impact to another Target Group – Youths/Young Adults Why Youths/Young Adults? It can be reasonably inferred from statistical data that youths (below 20) and young adults (20-30) are either becoming more sexually active or engaging in riskier sexual behaviour. The number of Sexually Transmitted Infections (STIs) amongst youths rocketed by 118% between 2000 and 2008, while that of young adults increased by 67% during the same period1. Given these societal trends, this group seems increasing vulnerable to contracting HIV. Thus, we propose to mount a HIV prevention effort targeted at this group through similar means such as the promotion of condom use, regular HIV testing and creating a social identity to promote responsible sexual behaviour. 1. Going to Where Youths/Young Adults Are Instead of focusing on the Geylang red-light district, we propose establishing a presence at places where there’s a higher concentration of youths/young adults who are more likely to be sexually active and or engage in regrettable sexual behaviour. Some of these places would include entertainment nightspots such as clubs and pubs where the flow of alcohol and its adverse intoxicating effects are more keenly felt. 2. Distributing Educational Pamphlets and Condoms The content of the educational pamphlets targeted at the Chinese speaking Geylang crowd could be translated into English to cater to the younger set. The pamphlets could also include information, that would otherwise be absent in the Chinese-language version targeting the older crowd, directing our audience to social media sites (such as Facebook) where Action for Aids has a presence. We also propose modifying the taglines to be printed on condom covers, to appeal to the younger crowd. These taglines could include cheeky English language ones that the young can relate to. As with the Chinese speaking Geylang crowd, we propose to craft a social identity for the young who are sexually active, that would positively associate them with condom use and having regular HIV tests, by promoting their ‘clear’ HIV status as an asset. Assisting Action for Aids with the Implementation of a Mobile HIV Testing Van (MTV) Service Action for Aids (AFA) has plans to introduce a MTV service, to make HIV testing more convenient. Otherwise, AFA only has one test site at Kelantan Lane that may be out of the way. As the operational costs of such a van are high, and that the service will have to be chargeable, we propose committing part of our $1000 budget to subsidising these tests (the ones at AFA’s Anonymous Test Site cost $30) during the initial phase of the van’s operation, so as to allow the public to first acquaint themselves with the quality and safety of the service provided. How to cite HIV in Singapore, Essay examples