Blade as a part of an engine.
Blades The turbine is the probably the most critical part of the engine, and has always imposed the main limitation upon engine power and development. This is because, while to operate in gas temperatures only slightly less severe than those experienced by the stator blades, the whole turbine rotates so fast that centrifugal force exerts a force of many tons on each blade, tending to pull it out of the disc in which it is mounted. The acceleration on each blade may amount to several thousand ( g's), so that a blade with a mass of a few ounces may experience an end load of two or three tons and a consequent stress of 30,000 pounds per square inch or more. On the top of this, the blade must withstand the very large sideways, or tangential, gas load which makes the assembly rotate, as well as high-frequency vibrations which tend to induce fatigue in the metal. Special materials have had to be produced to make blades that will stand up to such demands, Most of the earliest blades were made of Nimonic 80 and similar alloys containing a high proportion of nickel. Their great advantage was an ability to resist creep - the lengthening of piece of metal when subjected to sever tension under conditions of high temperature . Many metals would run successfully in the form of a turbine blade for a few minutes or hours, but white or even cherry-red heat would weaken them so that they
Creating a safety system for a swimming pool used by the public.
GCSE Electronics - Stage 1 The problem At home my parents run a holiday park. One of the facilities that the park has is an outdoor swimming pool that is open throughout the summer months of the year. Due to health and safety laws within the PSOP (pool safety operating procedure) Swimming pools are required to have certain safety features. Swimming pools over a certain size are required to have a lifeguard, as our pool is smaller laws require that there should be a means of attracting the attention of staff should a problem within the swimming pool area arises. The second part of the problem is that only one of the doors that enters into the pump room are locked and although the door at the rear of the pump room is only accessible from through a gate it is possible that people can go through the gate and get into the pump room. I would need a function that could alert people if there was an intruder within the pump room Users of the project There will be two different types of users using the piece of equipment, one group to raise the alarm and another group of people to operate and control the alarm. The group that raises the alarm will be the paying customers of the park and sometimes local residents; they can range from the age of 1 - 70+ years of age. The other group is the one which control and operate the alarm, this will be a small group of about 12 staff who work
Eyewiyness Testimony - Significantly more RPs who are asked leading questions will state they saw a smashed headlamp than those who are not asked leading questions.
Patrick Southern Psychology Coursework Eyewitness Testimony Contents Introduction Methodology Hypothesis Analysis Bibliography Conclusion Project Brief Statement of hypothesis Significantly more RPs who are asked leading questions will state they saw a smashed headlamp than those who are not asked leading questions. Direction of Hypothesis A directional, or 'one tailed' hypothesis has been given. This means that it predicts specifically what will happen. This type of hypothesis has been given because looking at Loftus' 1975 study into eyewitness testimony (which is in ways similar to this study) we can predict the results. By doing this, validity is increased if the hypothesis is proved to be correct. Research Method The research is carried out using the independent measures design. This is because the disadvantages of the other designs made this the most suitable - the repeated measures design would increase order effects and the matched pairs design would be inefficient as it would take too long. It is the simplest design, making it easy to analyse or to explain to RPs when debriefing. It is also the quickest design to carry out as each RP takes part in only one of the groups. A disadvantage of this design though is that there is greater scope for participant variability - for example if 50% of the RPs in one group have been in a car crash, their feelings
D H W - 1 INSTALL HOT WATER SYSTEMS & COMPONENTS
D H W - 1 INSTALL HOT WATER SYSTEMS & COMPONENTS Pound lane Marlow ) There were no anticipated delays to know off except for materials /sanitary ware not arriving on time or arriving damaged, but the retailers assured me that the materials would arrive on time. 2) I ensured the cylinder sits in the space provided; I checked the size of the cylinder is adequate for the customer's requirements and to any future developments. I ensure all hot water outlets are currently working properly. I checked size of cylinder vent which is 22mm and discharging over tank. 3) The cold feed to the cylinder is 22mm which is adequate to supply the hot outlets. A 225 litres (50 gallons) storage cistern which is suitable and is also situated above the cylinder. 4) I checked with the customer that they were happy with the plans and sizing of the hot water cylinder. 5) Information on the job was available but there were no detailed plans, so we discussed and wrote out plans. 6) No specialised tools were required for the job; we have all tools and connections available in the van. All materials and equipment was ordered and delivered before we commenced any work. 7) I install the system to industry standards; I replace the gate valve on the cold feed because it wasn't holding up. 8) I installed the 450mm diameter by 900mm indirect pre-lagged cylinder, (which conforms to part L of the
Buiklding service
The property, which I inhabit, is an end of terraced two storey property situated in Belfast. There is an open plan kitchen and living room on the ground floor and three bedrooms and a bathroom on the first floor. Below is a simple sketch of the layout of my house: This second sketch identifies clearly where the heat producing appliances, heat emitters, cold water storage, hot water storage and cold and hot water outlets are in the property in more detail: Task 1 Firstly I will discuss the heating system that is in use in my student house. My home is heated through oiled fired central heating system. The main components of this are the oil tank and boiler, which are both located in the yard at the back of my student house. Oil fired central heating is a form of indirect heating. Indirect heating is where the energy purchased is consumed at some point outside the space to be heated and then transferred to equipment in that space for liberation. Below is a sketch illustrating how an indirect heating system operates: The medium used to transmit the thermal energy may be either liquid (water) or a vapour (steam) or a gas (air) and each may be used over a wide range of temperatures and pressures. In my home the medium used to transmit the thermal energy is liquid, as in my house a water based heating system is in operation. A water central heating system consists of basically
ICT in Manufacturing.
Chapter 3 - ICT in Manufacturing . Introduction In the face of ever-increasing competition from international market, many labour-intensive manufacturing companies face a stark choice: automation, or evaporate. Here are some of the many ways in which computers are used in the manufacturing world. * Order entry and processing systems accept and process customer orders. A fully integrated system will also calculate the quantity and cost of materials needed to make the items ordered, produce reports on any shortages of materials in stock that need to be ordered and raise the purchase order. It will then track the progress of the order through the manufacturing process so that customer queries can be answered. * Project management software provides management with the information necessary to keep projects within budget and on time. Reports can be produced showing actual costs versus projected costs, and the number of days ahead or behind schedule. * Expert systems can be used in a multitude of ways from calculating the cost of a new multi-storey office block to detecting when a batch of beer is ready for the next stage of the brewing process. * Computer-aided design systems are used in thousands of different applications from designing a new jumbo jet to the design of the most aerodynamic material for a ski racer's suit. * Computer-aided manufacture enables components to
5 Zone Alarm System
5 Zone Alarm System THIS IS THE CIRCUIT WERE I GOT MY CIRCUIT FROM. Description this is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CMOS IC's and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zones a "system armed" indicator. The schematic is as follows: Circuit Notes: Each zone uses a normally closed contact. These can be micro switches or standard alarm contacts (usually reed switches). Zone 1 is a timed zone, which must be used as the entry and exit point of the building. Zones 2 - 5 are immediate zones, which will trigger the alarm with no delay. Some RF immunity is provided for long wiring runs by the input capacitors, C1-C5. C7 and R14 also form a transient suppresser. The key switch acts as the Set/Unset and Reset switch. For good security this should be the metal type with a key. At switch on, C6 will charge via R11, this acts as the exit delay and is set to around 30 seconds. This can be altered by varying either C6 or R11. Once the timing period has elapsed, LED6 will light, meaning the system is armed. LED6 may be mounted externally (at the bell box for example) and provides visual indication that the system has set. Once set any contact that opens will trigger the alarm, including Zone 1. To prevent triggering the alarm on entry to
It is important that Sarah is blind having access to speech and Braille output devices. But access to this assistive technology is not enough. In order for them to benefit fully from this technology, the educational software, applications software
Special Needs - Student at college - unit 3c Introduction Today, technology plays a role in almost all educational, employment, and recreational activities. I am going to write about a disabled student with a blindness problem are studying in college, she is 17 years old and she called Sarah. She has a learning disability which affects seeing processing. Like many students with invisible disabilities, such as learning, he is sensitive to the attitudes and perceptions of member classmates and instructors about his need for a note taker in class. She is unenthusiastic to announce this need among his classmates, fearing perceptions of special treatment, invalid reasons, and negative stereotyping. At first the college said that it would be not appropriate for her to go as she has a learning disability. On the courses of her choice, creatively using technology to support her studies.. As well as writing assignments on adapted computers, Sarah uses technology for taking notes and accessing prospectus materials. And with effective use of the Internet she can access materials and information previously available only in print. Her blindness problem will benefit having her adapted computer system for her class work, home work and this may be portable. In addition, there is often the requirement to make use of college systems to access Intranet materials and Virtual Learning
Isambard Kingdom Brunel.
Isambard Kingdom Brunel Isambard Kingdom Brunel was born in Portsea on 9th April 1806 to an English mother (nee Kingdom) and a French father. His father, Marc Brunel, was a French monarchist whose continuing residence in revolutionary France had made life there somewhat uncomfortable. When working in New York, Marc conceived and patented machines to produce wooden pulley-blocks for the world's navies. This tackle block technology was adopted by the British Admiralty and Henry Maudsley's engineering company was engaged to build the machinery for their manufacture. Isambard had a French and English education. The technical side included mathematics and apprenticeship with Breguet a precision-instrument maker. Further practical experience came from working in the family engineering office and at the Maudsley engineering works where in 1829 the famous engineer, James Nasmyth the Bridgewater Foundry and steam hammer (1839) also trained. In 1818 Marc Brunel designed and patented a tunnelling shield. This moved the tunnel face forward and prevented collapse whilst work was done lining the hole. The design led to the formation of the Thames Tunnel Company (1818) and allowed the excavation of the Thames Tunnel to commence. This eighteen year project boring under the open sewer of the Thames suffered two major disasters. Isambard himself nearly drowned in the second flooding of
HEALTH AND SAFETY
PRODUCE AN ANALYSIS OF MY OWN ROLE AS A WORKER IN HEALTH AND SOCIAL CARE IN RELATION TO MAINTAINING THE HEALTH, SAFETY AND SECURITY OF THOSE WITH WHOM I INTERACT: SERVICE USERS, THEIR FAMILY AND FRIENDS, TEAM MEMBERS, SUPPORT STAFF, PROFESSIONALS, MANAGERS AND VISITORS / EXTERNAL AGENCIES. I am employed to support members of a team in the provision of care to 11 residents with learning difficulties. I work with residents with mental health or behavioural problems or Autistic Spectrum Disorders and I seek to ensure that all residents and staff can live and work in a secure but caring environment. I help the residents with their daily routine, including bathing, feeding, dressing and toileting. I am employed to enhance the quality of life of the residents as outlined in the Codes of Practice and this often involves accompanying them on leisure outings and shopping trips. The Codes of Practice for Social Care Workers sets out clearly the standards of conduct, training and practice required of social care workers. Many people rely on the honesty, integrity and professional skills of social care workers and these codes spell out the standards people can expect of them. The codes are essential for regulating the profession and helping to improve standards and public protection. The Codes of Practice allows proper enforcement of social work values and provides a framework for