Falls among older adults, especially those with complex comorbidities like cognitive impairment, present a considerable challenge in rehabilitation settings. Conventional treatment approaches often fall short in addressing these multifaceted needs, underscoring the demand for comprehensive, individualized rehabilitation solutions. Augmented Reality (AR) technologies are emerging as promising tools to meet these challenges, offering tailored interventions that respond to each patient's unique requirements. AR-based systems facilitate immersive and interactive rehabilitation, enabling patients to engage in activities that support both physical and cognitive health. Additionally, AR allows healthcare providers to offer real-time, remote support, expanding access to care for underserved populations. This paper introduces the Virtual Coach Platform, an AR-based rehabilitation system designed to address both the physical and cognitive needs of patients. The platform comprises an AR headset, which projects a 3D virtual coach, and an Android-based software application that integrates physical exercises, cognitive games, and exergames. By examining the challenges and advantages of this system, we highlight how the Virtual Coach Platform can foster greater patient adherence and engagement.

Air pollution has emerged as one of the most significant environmental issues in recent years, both globally and in Serbia. The high levels of pollutants in the air have been strongly linked to various adverse health outcomes, including increased mortality rates. One of the key factors in addressing this issue is the ability to assess and predict pollutant concentrations, especially when they exceed permissible limits for extended periods. These elevated concentrations can cause a range of health problems, particularly related to the respiratory system. This paper presents modeling approaches used to assess air pollution and its impact on human health. By utilizing different models and methods, we can simulate the emission, dispersion, and transport of pollutants. These models also help to evaluate the health risks associated with specific pollutants by estimating pollutant deposition in the human respiratory system. This study provides an overview of the modeling process in understanding air pollution patterns and their correlation with public health. The results highlight the importance of air quality models in identifying areas with elevated pollution levels and forecasting pollutant behavior under varying meteorological conditions. The insights gained from such research can inform policy decisions and contribute to the development of mitigation strategies aimed at reducing the environmental and health impacts of air pollution in Serbia.

In this paper, we will consider the forces in knee joints in football and futsal players during different types of jumps. We will consider two types of jumps: jumps with flywheel and jumps without flywheel. This study has two main aims. The first aim is to compare the knee joint forces in football players and futsal players during different types of jumps. The second aim is to determine the distribution of deformation and stress in menisci of the knee joints in football and futsal players. Professional futsal players performed jumps that were analyzed using a force plate and high-speed video camera system. For this purpose, a 3D model of the human knee joint was developed from medical scans. The 3D model of the human knee joint consisted of femur, fibula, tibia, articular cartilage, ligaments and menisci. Loads and material characteristics were adopted from the literature. The use of finite elements analysis enabled us to gain better understanding of the distribution of deformation and stress in specific parts of the knee joint, with the special focus on the menisci.

In this study, we will consider the forces in the knee joints of futsal players at the beginning and at the end of the training process focusing on two types of jumps: jumps without swing and jumps with swing. This study has two main objectives. The first objective is to compare the forces in the knee joint at the beginning and at the end of the training process in jumps without a swing and in jumps with a swing. The second objective is to show the distribution of deformations and stresses in the menisci of the knee joint at the beginning and at the end of the training process. Professional futsal players performed jumps that were analyzed using a force plate and high-speed video camera system. For this purpose, a 3D model of the human knee joint was developed from medical scans consisting of femur, fibula, tibia, articular cartilage, ligaments and menisci. Loads and material characteristics were adopted from the literature. Using finite element analysis, we were able to obtain a better insight into the distribution of deformation and stress in particular parts of the knee joint.

During everyday activities cartilage experiences high loads, stresses, deformations, and contact forces. Sometimes, those activities can lead to permanent damage, such as focal lesions. Focal cartilage lesions have been associated with the progressive degeneration of the surrounding cartilage tissue. This paper aims to compare the mechanical response of the knee joint and femoral cartilage using finite element models during the stance phase of the gait cycle. Our model, developed from MRI scans, has been used to compare the mechanical response of the knee joint with healthy and damaged femoral cartilage. The location of the lesion was above the anterior section of the lateral meniscus. Comparison of the obtained results has shown that having a lesion in the previously mentioned location leads to a significantly higher peak Von Mises stress values.

Aim of this study was to analyze how modifications in circulation chamber dimensions affect aerosol particle deposition in a Dry Powder Inhaler (DPI) Aerolizer®. Combining computational fluid dynamics (CFD), for simulation of fluid flow (air), with discrete phase model (DPM) for particles simulation, we can better understand particle dispersion within inhalers air flow field. Input in the simulation was 20mg of aerosol particles with initial velocity of 11,79166m/s. Dimension change influences maximum velocities, as well as percentage of deposited particles. Based on these information we were able to calculate the number of particles on the outlet and compare efficiency reduction when circulation chamber height increased. Knowledge obtained in this way can help in device performance optimization.

Hip replacement surgery is one of the most common and most successfully performed surgeries. Hip is an important joint in the human body that provides us with ability to perform different daily activities (walking, running, etc.). In this paper we have analyzed biomechanics of femoral bone with cementless hip prosthesis. The goal was to analyze stress distribution of the implant and femur bone. For numerical calculations of the stress distribution we have used finite element analysis. Presented results include von Mises stress distribution and Maximum Principal Stress distribution.

A three dimensional biomechanical model of the human knee joint was developed. The model was created from MRI scans and includes: bones, menisci, articular cartilage and relevant ligaments (posterior cruciate ligament, lateral collateral ligament and medial collateral ligament). The purpose of this study was to compare the stress distribution on the human knee joint in two situations. The first situation includes the rupture of anterior cruciate ligament (ACL) while the second situation includes the ACL rupture and the condition after medial meniscectomy is performed. We have used the finite element model of human knee joint to measure stress when person is standing on one foot. The finite element analysis can provide better insight at the situation in the knee joint when having anterior cruciate ligament and meniscus injury.