Visual standards distance vision 6/9 speakers
The eye is perhaps the most interesting of all optical instruments. The eye is remarkable in how it forms images and in the richness of detail and color it can detect. Image formation by our eyes and common vision correction are easy to analyze with the optics discussed in Geometric Optics. Figure 1. The cornea and lens of an eye act together to form a real image on the light-sensing retina, which has its densest concentration of receptors in the fovea and a blind spot over the optic nerve.
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Vision loss in patients with giant cell arteritis treated with tocilizumab
DFC 1. We added class-leading towing technologies, such as 15 available camera views 3 some views may require an available trailer camera , to make trailering more convenient, whether pulling a large cargo trailer or fifth-wheel camper. And we made a host of changes to make tasks easier. Customers can choose a new, standard 6. It is matched with a six-speed automatic transmission. In addition, every component on the Silverado HD, between the transmission and the wheels, has been upgraded to enable an available percent increase in max towing capability — up up to 35, pounds requires HD regular cab 2WD with dual real wheels, available diesel engine and gooseneck hitch.
Tougher, stronger and more capable The Silverado HD increases towing capability across the lineup compared to This greater capability is driven by chassis and suspension enhancements and new propulsion combinations that work seamlessly to offer confident performance with great durability, particularly when towing.
The upgraded driveline includes robust front and rear axles, including an Also, percent-larger-diameter prop shafts provide greater strength with the high torque output of the new 6. Helping cool the Duramax engine is a massive inch-diameter fan with variable fan speed 2. More than 90 percent of heavy-duty truck owners use their truck for trailering, making it one of the most important considerations for customers, with convenience and confidence their top concerns when towing.
The Silverado HD delivers with an Advanced Trailering System designed to make every aspect of towing easier and more convenient. The Silverado HD offers up to 15 unique camera views, including HD Surround Vision3, Bed View 3 , an industry-first transparent trailer view 3 , and an accessory camera3. The transparent trailer view helps with views through the trailer as if the trailer was not there providing added confidence when towing.
The transparent trailer helps with navigating parking lots, merging into traffic or when making tight turns. It uses two cameras — one tailgate-mounted camera and an available accessory camera installation required mounted on the rear of the trailer — to provide a wide display that helps the driver to virtually see through and alongside the trailer. Other towing technologies include an in-vehicle trailering app 10 , complete with customizable trailer profiles, trailer light test, trailer electrical diagnostics, trailer tire pressure and temperature monitoring, maintenance reminders and pre-departure checklist.
New direct-injected 6. It is built with a forged steel crankshaft, forged powder-metal connecting rods and additional high-strength components to help provide the added strength and durability demanded by HD customers. Gasoline direct injection offers more precise fuel control in the new engine, which enables a higher compression ratio of The 6.
A diesel after-run feature specifically for use following a demanding towing situation is an additional new technology for the Duramax engine. The after-run allows the engine to keep running for up to 15 minutes to allow it to cool down using the fan and circulating coolant.
If the driver puts the truck in park when an after-run situation is needed, an alert will appear on the driver information cluster directing them to keep the engine running for cool down. Should the customer ignore the message and exit the vehicle, the truck will restart on its own via remote start mode for cool-down. At that point the customer can walk away and the truck will turn itself off when the engine reaches an acceptable temperature.
It also supports smart engine braking, which can help reduce brake wear. As a result, we deliver all lb-ft of torque to the ground in first gear.
For customers powering other equipment with their trucks on the job site, an all-new, factory-integrated engine-driven Power Take Off PTO is available and eliminates the need for an aftermarket unit.
And because it is engine-driven rather than turbine-driven, owners can use the PTO while the vehicle is idling. A button inside the cab enables the PTO, and a mode selector allows adjustment of load and torque output. Heavy-duty details Designers and engineers examined every detail of how heavy-duty customers use their trucks and developed the all-new Silverado HD with new, thoughtful and more intuitive features that make day-to-day work and interaction with the truck easier and more convenient — including features such as smooth outer door skins that enable easier business signage application.
Highlights include:. Larger and more functional design — with distinctive models Longer, wider and taller, the Silverado HD is larger in virtually every measure compared to the current HD.
From a design standpoint, the Silverado HD has the most differentiation from light duty ever. The roof is the only shared sheet metal between the two trucks — every other piece is exclusive to HD, and scaled as such. Inside, the Silverado HD offers a roomier, spacious, work-focused cabin with class-leading front head- and legroom, plus nearly 3 inches of additional rear-leg room in Crew Cab models while offering more innovative storage options.
For the first time on Silverado, the HD cargo beds are not shared with the light-duty models. They are designed specifically for the HD with unique dimensions, but still incorporate the multi-piece inner panels previously a single panel design and strong, rolled-steel bed construction featured on the Silverado The bed length is also about 3 inches longer on the standard bed, extending length, adding volume and extra clearance for longer items.
The long bed length remains 8 feet long. With the extra width enabled by the multi-piece inner panel construction, the total cargo bed volume expands 14 percent and about 9. The larger volume for the long bed — Optional equipment is extra. Max towing capability is available on HD regular cab with dual rear wheels, available 6.
The driver should remain attentive to traffic, surroundings and road conditions at all times. Visibility, weather, and road conditions may affect feature performance.
Read the vehicle's owner's manual for more important feature limitations and information. Service availability, features and functionality vary by vehicle, device and the plan you are enrolled in. Some features require working electrical system. User terms apply.
Device data connection required. See onstar. Control and monitoring functionality varies by trailer manufacturer, model, and installed options. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.
Requires compatible iPhone and data plan rates apply. Apple CarPlay is a trademark of Apple Inc. Data plan rates apply. Data connection may be required. Some features require active service plan and working electrical system. User terms and limitations apply. Connected services include navigation services and Remote Access Plan.
Services subject to Terms and limitations. Certain services require working electrical system, cell reception, and GPS signal. OnStar links to emergency services. Availability subject to change. To check for phone or other device compatibility, see my.
Not transferable. Standard connectivity available to original purchaser for 10 years from the date of initial vehicle purchase for model year or newer Chevrolet vehicles. Connected Access does not include emergency or security services. Availability and additional services enable by Connected Access are subject to change. Children are safer when properly secured in a rear seat in the appropriate child restraint.
Please view your lighbox to modify the assets. It is recommended that you download your current lightbox contents and clear its assets to add more. See More Images. Propulsion Systems. Contact Us Chevrolet. Vehicles Images Videos Brand Racing. Follow Us. Chevrolet Silverado HD - Back. Product Information Specifications. Advanced Trailering System technologies and new transparent trailer view 3 : The in-vehicle trailering system features an available total of 15 available camera views requires an installed accessory camera , such as HD Surround Vision 3 and other unique views including a transparent trailer feature to help provide added confidence when towing.
Also features increased integration with the myChevrolet mobile app 4. HD-exclusive sculpted exterior design features the most differentiation from the Silverado ever — the roof is the only shared sheet metal.
Heavy-duty details designed to make work easier and more intuitive, including features such as an easier-access engine block heater cord outlet in the front bumper, easy-to-fill diesel exhaust fluid DEF tank with the fill opening inside the fuel door, a more integrated snow plow prep package and new, available trailering mirrors with perimeter and auxiliary lighting and more.
BedSteps feature and larger CornerSteps makes it easier to load or reach items in the cargo bed, which is designed to hold a pair of size boots and up to pounds. Larger cab enables more spacious interiors with Crew Cab models adding about 3 inches in overall length.
All-new Park Grade Hold Assist enhances hill hold by using braking effort to help keep the truck in place for an extended length of time. Enhanced Digital Variable Steering Assist dynamically optimizes power steering according to driving scenarios and enables features like road pull compensation. Highlights include: Relocated engine-block heater cord plug-in. It is integrated into the front bumper, eliminating the need for cords hanging out of the grille or to open the hood for plug-in.
The block heater is standard with diesel models and available with the new 6. More-intuitive snow plow package The front end of the truck is designed for easy removal of the air dam and skid plate for easier and more intuitive mounting of the plow hardware. The design even eliminates the need to drill additional holes in the front bumper. And when the plow blade is removed, the Silverado HD returns to form by maintaining a smooth, integrated appearance without visible hardware.
Diesel DEF fill enhancements. An electronic gauge readout for the DEF fluid level is added to the Driver Infotainment Center of diesel-equipped models.
Frequently asked questions
JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. Ceiling speakers are a long-term audio solution and will provide you with room-filling sound for decades to come. Is it for ambient music or do you want to be able to throw the odd party on occasion?
Ocular Status of Commercial Drivers in a Nigerian Community
Information about visual behaviors that may indicate a possible vision problem can be obtained from observation of the child, from expression of parental concern about the child's vision, or from information provided by the parent s in response to specific questions. Examples of clinical clues of a possible vision problem include:. The age ranges for the visual developmental milestones are approximate and will vary somewhat for each child. Because many of the visual milestones are dependent on other areas of development such as development of cognitive and motor skills , a delay or failure to achieve a visual developmental milestone may be an indication of a vision problem, or it may be an indication of some other developmental delay. Next Back to Index. Navigation menu. Failure to achieve the following milestones may be an indication of a vision problem.
FIBRE Equipment Guide
The role of a firefighter has evolved significantly over the last few years and, as a result, firefighters have to be more adaptable and flexible in their approach than ever before. Our firefighters can find themselves managing environmental issues, such as floods and storms, or attending health related incidents, therefore an ability to work under pressure as part of a team is essential. Our firefighters are also proud to be an integral part of the local community and often attend public safety events as well as making home visits, therefore good communication skills are vital. Whilst there is no specific requirement for any formal qualifications, candidates will be asked to undertake a number of psychometric tests during the online assessment process and these will include verbal and numerical reasoning. Should you wish to improve your English and Maths skills, there are various courses within the area which may be of interest please click here for further information.
All About the Eye Chart
When you visit the eye doctor for a checkup, you may be asked to read an eye chart. The chart measures your visual acuity, or sharpness of vision. If you already wear corrective lenses, the test results will tell your doctor if your glasses or contacts prescription needs to change. Various types of eye charts are available. Some charts use pictures or patterns, while others use letters.
Car Music System
Like us on:. J Community Med Health Educ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Driving is the primary mode of travel in many countries [ 1 ]. It facilitates the performance of routine daily activities and it is thus integrated with the concept of quality of life [ 2 ]. In Africa, driving a car is still considered a privilege, an enviable option not a risky task with inherent responsibilities [ 3 ]. In Nigeria commercial vehicles are operated as business ventures.
HUAWEI Band 6
The 18dB crossover has been optimized for size, and features built-in tweeter protection. Utilizing Metallized Polypropylene capacitors, high-powered resistors and audiophile-grade air-core inductors, the crossover delivers outstanding overall sound quality and easy mounting in a door or under a seat. These QSC speakers work best with watts of recommended power. See below for more details.
We assessed how visually impaired VI people perceived their own auditory abilities using an established hearing questionnaire, the Speech, Spatial, and Qualities of Hearing Scale SSQ , that was adapted to make it relevant and applicable to VI individuals by removing references to visual aspects while retaining the meaning of the original questions. The resulting questionnaire, the SSQvi, assessed perceived hearing ability in diverse situations including the ability to follow conversations with multiple speakers, assessing how far away a vehicle is, and the ability to perceptually segregate simultaneous sounds. All participants had normal hearing or mild hearing loss, and all VI participants had some residual visual ability. VI participants gave significantly higher better scores than sighted participants for: i one speech question, indicating less difficulty in following a conversation that switches from one person to another, ii one spatial question, indicating less difficulty in localizing several talkers, iii three qualities questions, indicating less difficulty with segregating speech from music, hearing music more clearly, and better speech intelligibility in a car. These findings are consistent with the perceptual enhancement hypothesis, that certain auditory abilities are improved to help compensate for loss of vision, and show that full visual loss is not necessary for perceived changes in auditory ability to occur for a range of auditory situations. For all other questions, scores were not significantly different between the two groups.
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Latter-day Saints meet together to worship, edify each other, and teach and learn the gospel see Alma ; Moroni —6. Leadership meetings help leaders counsel together and coordinate efforts to serve others. However, holding a meeting should never replace serving and ministering as Jesus Christ did. The work of salvation and exaltation can be planned in a meeting, but it is most often accomplished outside of the meeting.
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