# Special Issue \"Feature Review Papers in Mechanical Engineering\"
## 2 An Overview of Published Articles  
Contribution 1 focuses on enhancing the functionality of crank presses by introducing actuators with dwell in which the output link remains stationary during part of the work cycle. By utilizing a fourth-class structural group, the study expands the capabilities of the crank press, allowing for precise control over the dwell duration. Numerical experiments led to the design of four variants of crank-knee press actuators, optimizing dimensions for improved performance, and the methodology involved kinematic analysis and the development of numerical algorithms and modeling programs. The results demonstrate the ability to regulate dwell duration based on slider guide eccentricity and rack coordinates. The findings provide insights into designing crank-knee presses with specific stroke and dwell requirements, offering potential solutions for precise mechanism synthesis.  
In today's manufacturing landscape, the need for flexibility to swiftly respond to customer demands while maintaining operational efficiency is paramount. Industrial Robots (IRs) have emerged as primary resources for modern factories due to their versatility in executing flexible, reconfigurable, and zero-defect manufacturing tasks. However, the effective implementation of IRs is hindered by limitations in control and programming, especially in dynamic production environments or for complex applications. To address these challenges, new technologies supporting more efficient methods for robot control and programming have been developed. Contribution 2 aims to identify and evaluate the main approaches proposed in scientific papers and by the robotics industry in recent decades. Following a critical review of the standard IR control schematic, the paper discusses available control alternatives, summarizing their characteristics, range of applications, and remaining limitations.  
Cellular manufacturing systems are widely embraced for their ability to combine the flexibility of job-shop setups with the productivity of flow-shop arrangements. Recent trends such as shortened product life cycles, demand variations, and new technologies have prompted manufacturing companies to enhance responsiveness and streamline cellular manufacturing life cycles through cell redesign. Sustainability concerns, particularly regarding energy costs, are also driving efforts to develop models supporting the sustainability of cellular manufacturing systems. Contribution 3 provides an overview of recent works on design approaches to enhance responsiveness and sustainability in cellular manufacturing systems, highlighting key findings and suggesting future research directions.  
Contribution 4 comprehensively reviews effective control applications using shape memory alloy (SMA) actuators, with a focus on vibration and stiffness control in flexible structures and shape control in aerospace engineering. Various vibration control methods and strategies are discussed, along with control strategies like neuro-fuzzy controllers and the inherent hysteretic behavior of SMAs. Additionally, the applications of SMA actuators in morphing wingsin aerospace engineering are reviewed, emphasizing control logics and geometrical parameters. A summary table of the study's contributions is provided, aiming to facilitate the development of advanced vibration and morphing control techniques using SMA actuators.  
The application of Constructal theory to flow design in engineering connects channel architecture with their morphing freedom. Svetleness emerges as a crucial parameter in assessing flow architecture evolution, despite its limited use in engineering applications. Contribution 5 explores the application of Svetleness, understanding its impact and evolution over time, and its relevance in explaining freedom to morph in a flow. Using two configurations, the review illustrates the relevance of using the configuration area for the external length scale, offering insights into its potential as an engineering design tool.