20:58.0 - 21:03.0 You can make it rectangular, you can make it rounded, 21:03.1 - 21:05.1 depending on what you want to focus on. 21:05.2 - 21:10.0 Of course you can use different palettes, different types of icons. 21:10.1 - 21:14.4 Again, icons are usually mnemonic 21:14.5 - 21:19.3 and denote the action that people rather do. 21:19.4 - 21:25.0 If you are shown a sign of a cloud, then you understand we mean “Cloud”, some Cloud technologies. 21:25.1 - 21:32.5 If you show this cloud to a child, what will be the reaction? Well, not always clear. 21:32.6 - 21:37.4 If you show a cloud to an older person, they will most likely think that there is some kind of weather stuff. 21:37.5 - 21:45.4 Generally, their reaction to this button will be generally unpredictable, from the point of view of the designer and from the point of view of the programmer. 21:45.5 - 21:52.5 Some people are colorblind, who do not recognize colors. Generally, if you make such buttons, or such ones, 21:52.6 - 21:55.7 nothing good will come of it. They just won’t see them. 21:55.8 - 22:02.6 It will be just a white background for them and maybe shades of grey, or they won’t see this button on the screen at all 22:02.7 - 22:07.5 and will look for a long time where to press that OK button to close that window. 22:07.6 - 22:18.9 You should always be able to switch to modes that allow people with different health conditions to work. 22:19.0 - 22:24.7 In Windows, there is such a possibility,if the programmer has connected all these features, 22:24.8 - 22:33.1 then switching Windows to the mode for colorblind and visually impaired should turn all programs into that mode. 22:33.2 - 22:40.8 Well, only if the programmer specifically considers this. If not, then your program will remain with the same colors, with the same size. 22:40.9 - 22:52.6 Next… Of course, each program can be decomposed into other types of display. 22:52.7 - 23:04.3 For different groups of people these displays should be different and, so each time under different devices you need to reprogram each element, each interface, 23:04.4 - 23:11.7 to do different sets of procedures over functions, which will be realized, 23:11.8 - 23:16.6 and, accordingly, you will have the structure of dialogues completely changed. 23:16.7 - 23:25.5 We will have this with you in the laboratories and we will have it on the lectures in the following methods too. 23:25.6 - 23:34.1 Well, the main definition, yes, just as our subject is called, this is the most basic definition. 23:34.2 - 23:42.3 I recommend you write it down, it will be admission to the exam. Who does not know what is the intelligent definition, will not receive the admission. 23:47.5 - 23:57.1 Our discipline combines knowledge of the “psychology of cognition”, which means that we have to study different people in different aspects, 23:57.2 - 24:05.4 we have to design a software product or some computer system according to their psychology. 24:05.5 - 24:15.9 A computer system can be this model(on left board), the one we considered here before, that we have a mechanized part, a computer, 24:16.0 - 24:25.0 maybe some firmware, drivers, there are electronic data transmissions, and then there is an human – machine interface for user interaction. 24:25.1 - 24:32.4 This is exactly our computerized stuff. In addition, sociology. Sociology deals with groups of people. 24:32.5 - 24:39.7 If you know, there are such youth trends like Goths, Emo, whoever else is there. 24:43.0 - 24:50.3 Yes, they also perceive things differently, so if you want to make a program for them, for being actively used, 24:50.4 - 24:56.4 it is desirable to know their social behavior and how they deal with that kind of program. 24:56.5 - 25:08.4 Ergonomics is also necessary. Ergonomics determines comfort. That is how much this product will not be redundant, 25:08.5 - 25:14.9 how quickly you will react to it and be able to use it immediately and you will not be 25:15.0 - 25:21.6 psychologically irritated and you will always be psychologically satisfied with the ease of use. 25:21.7 - 25:30.5 Of course, nothing can be done without system analysis. You must have had a subject like “Systems Analysis”? 25:30.6 - 25:33.9 Yes or no? 25:34.0 - 25:43.3 Where you had to collect all the parameters and according to the statistics calculate all the components and deviations from the norms. 25:43.4 - 25:51.1 Accordingly, these deviations and finding the average value allows you to recover this system analysis. 25:51.2 - 26:00.0 And the so-called industrial design. If we take an artistic design, the artist can draw a picture, 26:00.1 - 26:07.1 he thinks that his colors are optimal, that these sizes of sun, grass and the rest are good, 26:07.2 - 26:11.2 but if it’s all pasted on a tiny screen, this picture just does not fit. 26:11.3 - 26:17.6 For example, the color display technology on this display does not allow you to display all the palettes. 26:17.7 - 26:27.4 Therefore, the industry, the implementation of display types, affects the drawing of your buttons. 26:27.5 - 26:33.5 You will write a program, for example, for black and white displays, such as parking. 26:33.6 - 26:38.4 Colors are not necessary there, so you are only interested in fonts and resolution. 26:38.5 - 26:45.7 You need to consider exactly where, on which devices, in which cases, your program will work. 26:48.6 - 26:59.0 Well, since you and I use mostly computers, we need all interfaces that we will develop 26:59.1 - 27:09.0 within the frames of human-machine interaction for the widest class of users, to ensure this measure of efficiency. 27:09.1 - 27:16.9 Have you heard it, in some other subjects… did you have economics… in the first year? 27:17.0 - 27:26.1 Maybe you had an economy in school. You probably had to count efficiency. Human-hours, right? 27:26.2 - 27:31.0 We calculated labor productivity, economic effect. Counted, right? 27:31.1 - 27:36.8 You can also calculate these economic effects from the interfaces. 27:36.9 - 27:44.2 If there is a huge window and there are too many buttons, the efficiency for the average person will be low. 27:44.3 - 27:49.1 If he is an experienced programmer, then the more buttons, the better. 27:49.2 - 27:54.8 The efficiency of it on the contrary will increase than the fact that it will be poking long between windows. 27:54.9 - 28:01.1 Now, what else is there to mean? The so-called user experience. 28:01.2 - 28:06.9 Have you heard the concept of ‘user experience’ everywhere in vacancies, in offices?