Sajjad Rostamzadeh

User-centered design (UCD) has advanced significantly in recent years, propelled by the integration of emerging technologies such as additive manufacturing (AM), artificial intelligence (AI), and the incorporation of anthropometric and biomechanical data. These advancements are further supported by both subjective and objective assessment tools, as well as sensory systems that enhance the design process.These advancements (i.e. AM, AI, and anthropometry and biomechanics) have enabled designers to create products, systems, and environments that are tailored to the needs, preferences, and physical attributes of users. The emergence of Industry 4.0 and Industry 5.0 has accelerated the integration of User-Centered Design (UCD) principles, driving significant advancements in both productivity and design innovation. This chapter presents two UCD processes aimed at creating innovative solutions for real-world problems. The first project focuses on the development of a hands-free door handle, designed specifically for local hospitals to help individuals avoid transferring pathogens from door handles. The second project involves designing a crochet hook handle that improves ergonomics and user comfort during crocheting and reduces pain and discomfort associated with crocheting. Both projects utilized hands-related anthropometric data for design and were evaluated using subjective assessment tools.

Dear Chief Editor, I have completed the review of the revised version of the manuscript entitled “EVALUATION OF MUSICAL CONDUCTOR EXPOSURE TO NOISE [https://www.qeios.com/read/LPCS07.2]”. After carefully evaluating the authors' responses and the cha...

DEAR CHIEF-EDITOR I have carefully reviewed the manuscript titled "EVALUATION OF MUSICAL CONDUCTORS' EXPOSURE TO NOISE". The study presents a case evaluation of noise exposure among musical conductors and compares the findings with established occup...

DEAR CHIEF-EDITOR Thank you very much for giving me the opportunity to read and review this manuscript. The paper is a worthy contribution to assess and compare PhD supervisors’ capability, opportunity, and motivation by behavior change theory among...

DEAR CHIEF EDITOR Thank you very much for giving me the opportunity to read and review this manuscript. I thank the authors for taking the time to conduct this study. The paper is a worthy contribution to the design of an educational intervention ba...

Objectives. The decision-making trial and evaluation laboratory (DEMATEL) technique integrated with the analytic network process (ANP) is used for determination and prioritization of cause–effect relationships among factors affecting construction falls. Methods. Considering the 135 fall accidents collected between 2013 and 2018 from 15 residential construction projects, 70 factors and sub-factors affecting the occurrence of construction falls were determined based on safety experts’ opinions. Questionnaires based on the former and the latter were then distributed among 10 occupational health and safety specialists to determine the effectiveness of the factors. The interactions and important degree of each factor are specified, using the DEMATEL–ANP approach. Results. Findings showed that organizational factors and their sub-factors have the greatest impact on construction falls and were considered as causal variables (D – R > 0), while individual and environmental factors were considered as the effect variables (D – R < 0). The results of prioritization using the ANP method showed that the work platform altitude, psychological/occupational stresses and interactions were ranked as the first through third priorities affecting the falls, respectively. Conclusions. It is necessary to implement a systematic strategy to reduce the unsafe conditions in construction projects and to pay more attention to organizational factors.

Objectives. This study aimed to investigate the relationship between dentists’ hand functionality (handgrip, tip-to-tip pinch, key pinch and palmar pinch strengths) and dental specialty (maxillofacial surgery, endodontics, pediatric dentistry), socio-demographic factors and hand–forearm anthropometric dimensions. Methods. A cross-sectional study was designed in which 720 certified dentists (330 males and 390 females) voluntarily participated in the study. A tape measure (±0.1 cm) and a digital caliper (±0.1 mm) were used to measure anthropometric dimensions. A Jamar dynamometer and pinch gauge were used to measure hand strength variables. Results. Hand strengths decreased with age and clinical experience, and were always greater in male than female dentists. Maxillofacial surgeons aged 35–39 years attained the highest values of handgrip and key pinch strengths, while endodontists aged 30–34 years attained the peak values of tip-to-tip pinch strength. Among the measured hand dimensions, forearm circumference was significantly greater in maxillofacial surgeons compared with endodontists and pediatric dentists. Conclusion. Hand functionality is specialty-related among dentists because distinct dental specialties expose practitioners to different task demands. Like any other manual workers, dentists need more ergonomic and usable hand tools tailored not only to the intended application but also to the anthropometry of users.