November 16th, 2023
Format Projection Screen Aspect Ratio – the ratio of height and width of the image. Best of all, when the aspect ratio matches the format of the projected image. Rusty holzer recognizes the significance of this. If you plan to use multiple formats (Which supports the projector), you can buy a screen with auto-correction format or roll screen, which can be rotated to the desired height. Standard typology of file formats, depending on the type of Projected Image: Audiovisual format – av 1:1 Universal screens that support the format of the square before the film by changing their height. Video format – ntsc 4:3 for projecting computer images or game console, as well as conventional television viewing. Format high-definition television – dvd (HDTV) 16:9 used to demonstrate most of the movies recorded on dvd, as well as the transmission of high definition television (HDTV). Size projection screen there are several general recommendations that can guide the choice of screen size. 1.
The height of the projection screen should be approximately equal to 1 / 6 the distance from the screen to the last row seats (a figure) In this case, the width of the projection screen can be calculated by a simple formula, depending on the screen format: 4:3 width = height x 1.33 width = 16:9 H x 1.78 2. The optimum height of the screen placement is: – for professional use – at least 125 cm from the floor to the bottom of the screen – for home theater – a minimum of 60-90 cm 3. For a better perception of the image the minimum distance to the audience (B) should be about 1,5 times more screen height (Y). The optimal screen size and distance also depend on the subjective preferences of the person. Therefore, the pre-experiment with Throw if plan fixed installation projector.
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May 6th, 2011
Perhaps a particularly important attribute of the workplace are office chairs. Certainly, the significance of this furniture is difficult to overestimate. It is difficult to explain the reasons for which in Russia is so casually refer to the selection of office furniture, because of its role in the life of the firm is very high. In particular, this applies to this item of furniture like office chairs. For employers, it becomes a rule to buy inexpensive furniture for the office. But this is fundamentally wrong. And this simply explained by the fact that a substantial part-time employees spend just on an office chair. And in this regard, proper selection of office chairs is very important.
So you'll not only be able to reduce occupational illnesses and injuries in the back of your employees, but also significantly improve the working efficiency. For clarity, turn your attention to a thorough selection of managers of foreign companies office chairs for their employees. And you will determine for themselves the whole significance of this issue. It's no secret is that Western people are basically incredibly stingy, and never pay for something that they do not necessary. In this case, all the Western companies are equipped with modern office chairs. For you, the employers, it is important to note that if you aspire to Western standards, it is a good comfort for the furniture should be not only in your classrooms and offices of your approach, but also in the offices of ordinary employees.
Raises the question: what are all the same causes "stingy Westerners" to buy furniture that class for the whole working staff? Reply elementary, because of its obviousness – wisely chosen seat can significantly minimize the level of occupational accidents and diseases. This is extremely important in the work of clerks. I would also like remind you that high-quality office chair increase both efficiency and productivity of your employees. But this automatically increases the income of the company! Not surprisingly, for such a people economically related to each dollar, is not afraid to spend money on expensive reliable office chair. Concluding the topic of the West, it should be noted that high-quality office chairs are arranged not only in large or medium-sized companies, but also in companies, rather low level of development. Many domestic managers of firms have taken note of all these subtle dependencies, and according to them equip their offices. They have learned well the philosophy of the west, and today safely use it in the domestic market. Today we can make a simple conclusion that the office chairs play an important role in the working life of the firm.
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