Background and Objective: Depression is a severe mental disorder, and accurate diagnosis is pivotal to the cure and rehabilitation of people with depression. However, the current questionnaire-based diagnostic methods...
详细信息
Breast cancer is one of the most common causes of death among women worldwide. Early detection helps in reducing the number of deaths. Automated 3D Breast Ultrasound (ABUS) is a newer approach for breast screening, wh...
详细信息
Modular process plants enable the process industry to adapt to volatile and fluctuating markets. The preferred process technology concept for these market scenarios is realized through combining pre-engineered process...
ISBN:
(数字)9781728189567
ISBN:
(纸本)9781728189574
Modular process plants enable the process industry to adapt to volatile and fluctuating markets. The preferred process technology concept for these market scenarios is realized through combining pre-engineered process equipment assemblies (PEA) from different manufacturers with standardized interfaces. While the flexibility gain for this type of plants is high, the design of the safety systems of these modular plants in terms of exchangeability and compatibility is challenging. One solution could be the development of a safety-interface for PEAs to create flexible and scalable safety systems. The principles of modular basic processcontrol are analyzed and requirements with respect to safety design are discussed. The authors provide a differentiation of the intramodular safety concept of a single PEA from the intermodular safety concept of a complete modular plant. A concept for safe and modular interaction of PEAs in a modular plant is developed and additionally validated on a basic demonstrator. Finally, from these findings, standardization requirements are provided and aspects for further research are pointed out.
Background: Systems Medicine is a novel approach to medicine, that is, an interdisciplinary field that considers the human body as a system, composed of multiple parts and of complex relationships at multiple levels, ...
详细信息
Promptable segmentation foundation models have emerged as a transformative approach to addressing the diverse needs in medical images, but most existing models require expensive computing, posing a big barrier to thei...
详细信息
Shape sensing based on optical fiber-Bragg-grating technology is an important field of research that promises to bring a solution for the observation and tracking of flexible tubes. Currently for shape sensing, an opt...
详细信息
ISBN:
(纸本)9781509020126
Shape sensing based on optical fiber-Bragg-grating technology is an important field of research that promises to bring a solution for the observation and tracking of flexible tubes. Currently for shape sensing, an optical fiber with integrated Bragg-gratings is attached to a flexible material, to measure the material strain caused by bending. In this paper, a new approach for shape sensing is presented. For the first time, the Bragg-grating structures and the optical waveguides are directly inscribed in planar cyclo-olefin copolymers that can perform characteristic deformation itself. This new method solves many present problems in shape sensing. These problems are e.g. that the placement of the fibers along the carrier material is difficult to realize in practice. Also the fiber does not always connect properly to the carrier material. Thus, the material deformation can not be sufficiently applied to the fiber. The general idea of optical shape sensing and the advantages of the new concept are explained in section I and II. Further on, the manufacturing process of a prototype is described in section II-A. To use the presented 1-component sensor for shape sensing, a geometrical model is defined and assumptions regarding the behavior of the measured values are made in section II-B. The prototype is tested and the measurement data is compared to the defined model. The obtained results are shown in section III. Finally, in section IV, a conclusion of the work is given.
To increase the rehabilitation outcomes of stroke patients with weak residual muscle activity, a novel control strategy for Functional Electrical Stimulation (FES) was designed and tested during a tracking task. The s...
详细信息
Gliomas are the most common primary brain malignancies, with different degrees of aggressiveness, variable prognosis and various heterogeneous histologic sub-regions, i.e., peritumoral edematous/invaded tissue, necrot...
详细信息
To increase the rehabilitation outcomes of stroke patients with weak residual muscle activity, a novel control strategy for Functional Electrical Stimulation (FES) was designed and tested during a tracking task. The s...
详细信息
To increase the rehabilitation outcomes of stroke patients with weak residual muscle activity, a novel control strategy for Functional Electrical Stimulation (FES) was designed and tested during a tracking task. The system includes an electromyography (EMG)-based feedback controller and a trial-to-trial adaptation of the FES support. The first modulates the stimulation intensity to achieve a desired amount of FES-evoked muscle activity corresponding to a desired FES-induced angular support trajectory. The second iteratively updates this trajectory in order to minimize the error between the target displayed to the patient and the measured angle trajectory. This support adaptation only takes place in case the subject actively contributes to the movement. If the estimated volitional effort is too low, FES support is quickly withdrawn to remind the subject to actively contribute to the tracking task. The EMG signal of the stimulated muscle is used to estimate both the FES-induced and the volitional muscle activity. The feasibility of the proposed control scheme was experimentally investigated in one healthy subject by stimulating the medial deltoid muscle to support shoulder abduction. First, the controller was tested simulating different volitional contributions of a potential patient. The control system adjusted the amount of FES-support as expected. Then, the compensation of muscle fatigue by the feedback controller was demonstrated by repeatedly applying the same desired FES-induced angular trajectories, while the subject was asked to be relaxed. As a result, the control system was able to provide the desired support for about 7 minutes until the stimulation intensity saturated.
暂无评论