درخت حوزه‌های تخصصی

A study of the arrow guide or nāvak in Iran. It covers the technical aspects of arrow guides and how they may have entered Iran. In Persian, arrow guides are called nāvak and their projectiles are called tīr-e nāvak. However, sometimes nāvak is used for the arrow as well, and even the bow. It also covers how outside cultures viewed Iran as a source of innovation in the further development of these devices. In Arabic they are called majrā and this is the term most familiar in the west due to two important translations of Arabic archery manuals into English, Arab Archery and Saracen Archery, but they were mentioned earlier as nāvak in an English translation of part of the Hidāyat ar-Rāmī, where they were mistakenly described as crossbows. Essentially, an arrow guide is a partially closed tube used with a bow to shoot a short arrow drawn much farther than its length would normally allow. This produces a projectile that has increased velocity and less friction through the air than a regular arrow. The arrow guide has had a long history in Iran, probably entering in the last years of the Sasanian Dynasty, surviving the Arab conquest and persisting until the gradual takeover by firearms. It was fertile ground for invention with many variations being spread across the Islamic world. The persistent association with Iran in Arabic archery manuals reflects the perception that much of its development was tied to Persian users. Here, Persian and Arabic sources are examined. Reference is made to original artefacts and reconstructions.

The ability to recognize and compare shapes and understand the concept of proportions is one of the first human findings from environmental geometric data. And certainly the formation of geometry as a science of recognizing the arrangement of lines, shapes and levels and proportions leads to the definition of golden proportions in the mathematical sciences as a new way of organizing shapes and forms. Golden and geometric proportions are effective as a determining element in the scale of spatial forms, and the formation of spatial forms by not using or misuse of geometric proportions is due to functional and psychological interactions on human perception and cognition. Which causes the construction and formation of scales and proportions of the environment and the emergence of psychological effects due to human activities in the environment. And then the abnormal effects and environmental dysfunction on the saccade system of the human eye and as a result the feeling of fear and lack of belonging to the place interacts. On the other hand, nature as the raw material of creation, and the principle and mother of man, which causes him to model the proportions in nature. Understanding the laws governing the relationships between elements and spatial shapes leads to the formation of geometric and golden proportions in the spending of space. Because knowing the symbol of shapes, proportions and scales in the world of meaning and kingdom is reminiscent of the divine order in all dimensions of the world (even in astronomy). Therefore, evaluating the values ​​of spatial proportions in nature as the bedrock of human life and the pattern of psychological perceptions, leads to the adoption of human activities. Also, the study of human needs on a mental and psychological scale from the perception of the environment causes the recognition of scales and dimensions by human visual senses, which leads to the perception of the correct golden and geometric proportions through Sakadi eye movements and psychophysical sciences. . Certain ratios can also be observed in the creation and design of various shapes in nature. These relations are those geometric relations that have immaterial roots and follow the spiritual and supernatural principles, believing that their subject is sacred, and have a symbolic language and spiritual characteristics. In the traditional world, geometry was inseparable from the other four Pythagorean sciences, namely arithmetic, music, and astronomy. And traditional geometry is also associated with the symbolic composition and shapes of space. To this end, the study of the effect of golden and geometric proportions on human visual perception of the architectural environment based on the sense of belonging to the place, causes visual quality to increase the sensory richness of the place and achieve human values ​​and criteria in the sense of belonging to the place and human needs. To be considered by the architect. In this research, with the perspective of this identity and the interaction of geometric and golden proportions and the sense of belonging to the place, the criteria and indicators of the research have been studied and the results have been presented in the form of tables and diagrams.