Definition and Examples of Digraphs in English

A digraph in the English language is a group of two successive letters ​that represents a single sound or phoneme. Common vowel digraphs include ai (rain), ay (day), ea (teach), ea (bread), ea (break), ee (free), ei (eight), ey (key), ie (piece), oa (road), oo (book), oo (room), ow (slow), and ue (true). Common consonant digraphs include ch (church), ch (school), ng (king), ph (phone), sh (shoe), th (then), th (think), and wh (wheel). Importance Diagraphs are considered nearly equal to the letters of the standard alphabet in importance to learning to read and write in English. In Linguistic Tips for Latino Learners and Teachers of English, E.Y. Odisho, writes: [F]rom the pedagogical and instructional perspective, the digraphs should be given utmost attention in the teaching of almost all language skills of English because of the proportionally large number of digraphs in relation to the 26 letters; they are approximately one-fourth of the core letters. Other experts have indicated the difficulty that learning digraphs presents to English language learners. For example, according to Roberta Heembrock in Why Kids Cant Spell, the digraph ch can be pronounced at least four different ways: k (character), sh (chute), kw (choir), and ch (chain). Complicated System Some sounds can be represented only by digraphs. In Childrens Reading and Spelling, T. Nunes and P. Bryant offer examples such as sh (shoot), ay (say), and ai (sail). Still other sounds can be represented in some words by single letters and in others by digraphs, such as fan and phantom, which begin with the same phoneme but are written as one letter in the first word and as two letters in the second. This is a complicated system and probably, to young children at least, it may seem a capricious and unpredictable one as well, Nunes and Bryant write. Spelling Confusion Spelling words that incorporate digraphs is as tricky as reading them and determining the sounds that they create. For example, the six letters of the six-phoneme word strict are represented by six digraph units: strict. On the other hand, the six letters of the three-phoneme word wreath are represented by just three digraph units: wreath, according to Brenda Rapp and Simon Fischer-Baum in Representation of Orthographic Knowledge.  Ã¢â‚¬â€¹ The Past Tense ​Spellings A particular difficulty for children is learning to spell words that deviate from what they have come to expect in their learning process. This is often the case, according to Rebecca Treiman and Brett Kessler in How Children Learn to Write Words, with the past tense. As an example, they note that the past tense of mess (messed) sounds like mest and that of call (called) sounds like cald, each of which is still one syllable, while the past tense of hunt, which adds the ed sound to make hunted, has two syllables. Children are used to the latter pattern and find the former one odd.

Psy 265 Final Personal Response on Sexual Identity

University of Phoenix/Axia College | Personal Response on Sexual Identity | Psychology 265 | name 11/7/2010 | What is our purpose in life? That is a question many people ask themselves every day. As we become older people believe that wisdom is automatically granted through knowledge and experience. I was one of those people until taking this course. When first I opened and read the first chapter of the text I believed I was an experienced and a mature individual in knowing myself intellectually, mentally, and sexually. However, this has been an awakening although I do possess much about basic knowledge for my age in sexual issues there was still much I did not know (Rathus, Nevid amp; Fichner-Rathus, 2005).†¦show more content†¦However, even with all of these pieces coming together to create a person’s sexual orientation none of them completely determine a person’s sexual choice. The determination of my gender identity was preset by my parents giving me the chromosomes XY, gave me an anatomic appearance of a female. Also being reared in a hetero environm ent had an influence in becoming a female as well. So the relation to the masculinity-femininity continuum is that I posses both traits feminine and masculine. In some situations I tend to carry myself as a caring and soft-spoken female, is typical for feminine behavior. On the other hand I express more masculine attributes like aggressiveness and self-reliance, which is typical for masculine behavior. Both add in the development in determining and sustaining my gender identity. The biological perspective by the way was inherited from my parents and aided in the development of the characteristics in becoming a woman, gender role of nurturing and caring individual, and maternal tendencies in taking care of my child. Then the psychological perspective according to my mother to which she insists that I was a normal girl with particular behaviors toward feminine toys and clothes. As a final point, the social environment offers an insight into the typical social role of an American woman , which was predetermined at birth by my social surroundings (Rathus, Nevid amp;Show MoreRelatedEssay on Personal Response on Sexuality Identity1766 Words   |  8 PagesFinal Project: Personal Response on Sexuality Identity Adriele Ajavon Psychology of Human Sexuality/ PSY 265 10/24/2010 Dean Marzofka Sex is a significant act of life. The deed is commonly initiated by arousal and results in conception or sheer satisfaction. A great deal of thought rarely goes into the execution of the actual performance, as sexual urges are instinctive. The true brainpower lies within the thought processes associated with sex. Love, commitment, and friendship are three aspectsRead MoreHuman Resources Management150900 Words   |  604 Pages5 FIGURE 1—1 The 10 Occupations with the Fastest Employment Growth, 1996—2006 Numbers in Thousands of Jobs Occupation Database administrators, computer support specialists, and all other computer scientists Computer engineers Systems analysts Personal and home care aides Physical and corrective therapy assistants and aides Home health aides Medical assistants Desktop publishing specialists Physical therapists Occupational therapy assistants and aides Employment 1996 212 216 506 202 84 495 225Read MoreMedicare Policy Analysis447966 Words   |  1792 PagesE:\BILLS\H3962.IH H3962 78 1 plan beneficiary identification card or similar 2 mechanism; 3 ‘‘(E) enable, where feasible, near real-time 4 adjudication of claims; 5 ‘‘(F) provide for timely acknowledgment, 6 response, and status reporting applicable to any 7 electronic transaction deemed appropriate by 8 the Secretary; 9 ‘‘(G) describe all data elements (such as 10 reason and remark codes) in unambiguous 11 terms, not permit optional

3d Printers Free Essays

Rapid prototyping 3D printers 3D printing  is a form of  additive manufacturing  technology where a  three dimensional  object is created by laying down successive layers of material. 3D printers are generally faster, more affordable and easier to use than other additive manufacturing technologies. 3D printers offer product developers the ability to print parts and assemblies made of several materials with different mechanical and physical properties in a single build process. We will write a custom essay sample on 3d Printers or any similar topic only for you Order Now Advanced 3D printing technologies yield models that closely emulate the look, feel and functionality of product prototypes. A 3D printer works by taking a 3D computer file and using and making a series of cross-sectional slices. Each slice is then printed one on top of the other to create the 3D object. The cost of 3D printers has declined. The technology also finds use in the jewellery, footwear,  industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries. A large number of competing technologies are available to do 3D printing. Their main differences are found in the way layers are built to create parts. Some methods use melting or softening material to produce the layers (SLS, FDM) where others lay liquid materials that are cured with different technologies. In the case of lamination systems, thin layers are cut to shape and joined together. Selective laser sintering  (SLS) Selective laser sintering  (SLS) is an additive manufacturing technique that uses a high power  laser  (for example, a  carbon dioxide laser) to fuse small particles of  plastic,  metal  (Direct Metal Laser Sintering),  ceramic, or  glass  powders into a mass that has a desired 3-dimensional shape. The laser selectively fuses powdered material by scanning cross-sections generated from a 3-D digital description of the part (for example from a  CAD  file or scan data) on the surface of a powder bed. After each cross-section is scanned, the powder bed is lowered by one layer thickness, a new layer of material is applied on top, and the process is repeated until the part is completed. Compared to other methods of additive manufacturing, SLS can produce parts from a relatively wide range of commercially available powder materials. These include  polymers  such as  nylon, (neat, glass-filled or with other fillers) or  polystyrene, metals including  steel,  titanium, alloy mixtures, and composites and  green sand. The physical process can be full  melting, partial melting, or liquid-phase  sintering. And, depending on the material, up to 100% density can be achieved with material properties comparable to those from conventional manufacturing methods. In many cases large numbers of parts can be packed within the powder bed, allowing very high productivity. SLS is performed by machines called SLS systems. SLS technology is in wide use around the world due to its ability to easily make very complex geometries directly from digital  CAD  data. While it began as a way to build  prototype  parts early in the design cycle, it is increasingly being used in  limited-run manufacturing  to produce end-use parts. One less expected and rapidly growing application of SLS is its use in art. [pic] The picture above is made using SLS and is a very intricate design which would be very difficult to imagine if it was only drawn on paper. Digital Light Processing (DLP) In  DLP, or Digital Light Processing, a vat of liquid polymer is exposed to light from a DLP projector under  safelight  conditions. The exposed liquid polymer hardens. The build plate then moves down in small increments and the liquid polymer is again exposed to light. The process repeats until the model is built. The liquid polymer is then drained from the vat, leaving the solid model. The  ZBuilder Ultrais an example of a DLP rapid prototyping system Laminated object manufacturing (LOM) Laminated object manufacturing  (LOM) is a  rapid prototyping  system developed by Helisys Inc. Cubic Technologies is now the successor organization of Helisys) In it, layers of adhesive-coated  paper,  plastic, or  metal  laminates are successively glued together and cut to shape with a knife or  laser cutter. The process is performed as follows: 1. Sheet is adhered to a substrate with a heated roller. 2. Laser traces desired dimensions of prototype. 3. Laser cross hatches non-part area to facilitate waste removal. 4. Platform with completed layer moves down out of the way. 5. Fresh sheet of material is rolled into position. 6. Platform moves up into position to receive next layer. 7. The process is repeated. Note: †¢ Low cost due to readily availability of raw material †¢ Paper moulds have wood like characteristics, and may be worked and finished accordingly †¢ Dimensional accuracy is slightly less than that of  Stereolithography  and  Selective laser sintering  but no milling step is necessary. †¢ Relatively large parts may be made, because no chemical reaction is necessary. [pic] The above picture shows how intricate objects con be made by LOM. Fused deposition modelling  (FDM) Fused deposition modelling  (FDM) is an additive manufacturing technology commonly used for modelling, prototyping, and production applications. FDM works on an â€Å"additive† principle by laying down material in layers. A plastic filament or metal wire is unwound from a coil and supplies material to an  extrusion  nozzle which can turn on and off the flow. The nozzle is heated to melt the material and can be moved in both horizontal and vertical directions by a numerically controlled mechanism, directly controlled by acomputer-aided manufacturing  (CAM) software package. The model or part is produced by extruding small beads of thermoplastic material to form layers as the material hardens immediately after extrusion from the nozzle. Several materials are available with different trade-offs between strength and temperature properties. As well as  acrylonitrile butadiene styrene  (ABS) polymer,  polycarbonates,  polycaprolactone,  polyphenylsulfones  and waxes, a â€Å"water-soluble† material can be used for making temporary supports while manufacturing is in progress, this soluble support material is quickly dissolved with specialized mechanical agitation equipment utilizing a precisely heated  sodium hydroxide  solution. [pic] In the picture above the support material is easy recognised and can be broken away easily. 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