Journal of Iranian Architecture & Urbanism(JIAU)

Abstract Extended Abstract
Background and Objectives: The aim of this study is to explore the design, construction, and control of adaptive free-form shading structures that can react to changes in light levels. The focus is on developing a transformable scissor-like structure capable of changing geometry to achieve controlled forms. The key objective is to create an adaptive shading device for a specific courtyard, considering factors such as human interaction, relaxation, and optimal shading conditions.
Methods: The study employed a parametric design approach, utilizing digital tools such as Rhino software and Grasshopper plugin. The design process involved identifying influential environmental factors, defining control objectives, and simulating daylight receiving conditions using the Ladybug plugin. Different forms with varying support points were proposed and evaluated based on aesthetics, shading levels, and site constraints. In this method, the desired free-form surface is initially drawn. Then, the Iso-curves of the surface are extracted along the horizontal and vertical directions to obtain a mesh network of the surface. This mesh network is transformed into a three-dimensional spatial mesh structure, and finally, all the lines of this network are converted into scissor-like modules. It is worth noting that besides using horizontal and vertical Iso-curves, it is also possible to extract inclined, triangular, pentagonal, and multi-sided networks from the free-form surface. Through this approach, various double-layer networks with diverse multi-sided modules can be transformed into scissor-like structures. In the next step, special connections, including rod connections within each scissor-like unit and connections between neighboring units, were designed and labeled for laser cut wood. Control connections were introduced to enable deformation within the fixed span of the structure. The modified scissor-like element model by Akgun was utilized, allowing individual substructures to change independently. Arduino, a microcomputer chip, has gained considerable interest in architecture because of its user-friendly nature and its ability to work seamlessly with a range of sensors and controllers. It facilitates the creation of smart devices by taking input from sensors and switches and producing diverse responses, like modifying light levels, adjusting motor speeds, and controlling other outputs. Arduino can function autonomously or be linked to a computer, and it can be programmed using software such as Arduino’s own IDE or the Grasshopper plugin in Rhino. In terms of controllers, there are various options available, including pneumatic jacks, shape-changing smart materials like shape memory alloys, piezoelectric elements, and electromechanical motors. Servo motors, in particular, are commonly used controllers, especially in small-scale model-making, as they can create rotational motion based on the input voltage received from microcontrollers. 
Findings: Through simulations and analysis, it was found that among the alternatives mentioned in this article, a three-support-point canopy offered the most favorable inactive option, delivering the desired shading conditions for more hours throughout the year. This finding validated the effectiveness of the proposed design approach and highlighted the potential for achieving passive shading without relying heavily on active control. The laboratory-scale prototype demonstrated the feasibility of the adaptive shading model. Sixteen servo motors were connected to eight corrective units, allowing for changes in the angle between rods and structural deformation. Light sensors, Arduino kits, and a closed-loop control system facilitated the processing of sensor data and commanded the servo motors. The prototype successfully achieved controlled structural deformation in response to the presence or absence of sunlight.
Conclusion: The study presented a comprehensive framework for the design, simulation, and construction of adaptive and controllable free-form scissor-like structures. The research showcased the potential of digital architecture and embedded systems in creating dynamic and responsive solutions. By combining sensors, central processing units, and controllers, the suggested design for a shading system allowed for the adjustment of its shape in response to environmental conditions, particularly the movement of sunlight. The findings underscored the significance of considering both passive and active design strategies. While passive geometry and form optimization played a crucial role in achieving desired shading, active control mechanisms provided flexibility and adaptability to changing conditions. The study emphasized the importance of carefully selecting the form, placement of corrective modules, and incorporating various sensors to enhance the capabilities of such structures. In conclusion, this research contributes to the growing field of digital architecture by providing insights into the design and implementation of adaptive shading device. The proposed framework and the laboratory-scale prototype demonstrate the potential for creating adaptive and responsive architectural solutions that seamlessly integrate with their surrounding environment. Future research can explore additional sensors, materials, and control strategies to further enhance the adaptability and functionality of such structures in diverse architectural contexts.

Abstract Extended Abstract
Background and Objectives: Landscapes in general and townscapes in specific are susceptible to various natural and non-natural risks. Flooding is considered one of the primary factors that contribute to the vulnerability and problems faced by landscapes and townscapes. Although these conditions are present worldwide, they are more severe in Iran compared to other countries. On the one hand, natural disasters such as floods and earthquakes threaten this region. On the other hand, the built environments of this country are threatened by the weakness of inadequate building construction trends. In many cases, the structural systems and materials used in buildings do not meet the risk management requirements of the development process. The negative impact of the threatening development process has relatively different consequences on place dimensions. The impacts of disasters are often linked to the sensitivity of the specific features of a place. Among these features, townscapes and landscapes are particularly vulnerable to various disasters, more so than other dimensions of a place such as function and management. The future of a place is shaped by the consequences that occur in different zones and areas of communities. The measurement of vulnerability and resilience should consider the normative qualities of the environment, especially in terms of geographical contexts. The aim of this research is to assess the resilience of townscapes in relation to their environmental qualities, such as efficiency, richness, attraction, and variety, through the use of a case study approach. The research aims to assess the flood vulnerability of the Pole-Dokhtar region and city, with a particular emphasis on the spring 2019 flood. The study will use a case study approach and evaluate the resilience of the townscapes in relation to environmental qualities, such as efficiency, richness, attraction, and variety. The region of Pole-Dokhtar in Lorestan province, Iran, will be the specific area of focus.
Methods: The research method will involve the application of the development category to identify and address the major problems related to flood vulnerability. By this condition, the city engine analytical software has been used for analysis and finding trends of case study area data and information process. The research methodology involves three actions in field study techniques, which are the examination of current documents, site observation, and interviews with relevant stakeholders at the local and national levels. These studies incorporate data gathering stages. For data gathering trends, three sources have been used: 1- the information from the Pole-Dokhtar city’s master and detailed plans, as well as any written documents relating to any regional development plans and studies 2- Official data from 2019 flood variables. 3- Field survey, with emphasis on direct observation in the Pole-Dokhtar urban area. Observation trends encompass a journey to Lorestan province, Pole- Dokhtar County and Pole-Dokhtar city in spring 2020. In addition, the data has been analyzed through GIS and SPSS logic, techniques, and tools. Then, using the SWOT matrix helped researchers to compare the basic influential factors in terms of contextual strengths, weakness, threats, and opportunities.
Findings: The research has produced three main findings. Firstly, it highlights the vulnerability of areas like Pole-Dokhtar not only to floods but also to other natural and man-made disasters. Secondly, the research reveals the importance of specific attention to the land slope, river basin, and soil foundation to maintain environmental quality in urban landscapes. Lastly, the study emphasizes the need for a comprehensive examination of various planning documents at different levels, including master, structure, and detail plans.
Conclusion: In summary, the achievements of this study encompass various research outcomes regarding both townscape resilience and vulnerability of national, regional level and scale on various geographical contexts. In spite of this, long-term experiences in disasters like wars, earthquakes, droughts, floods and the same Iranian communities could not benefit from their valuable lessons. Learning from these valuable experiences should be the key lessons to solve and resolve ongoing problems and challenges which are essential for the comprehensive development of a country.

Abstract