The biomechanical variation in the knee during walking that accompanies medial meniscal radial tears stemming from osteoarthritis (OA) has not been explored. This study introduced a finite element musculoskeletal model using concurrent lower limb dynamics and joint analysis single framework expanded models to include knees with total meniscectomy. involved three locations: anterior horn, midbody, posterior horn grades of 33%, 50%, 83% meniscus width. shear hoop stresses tear tibial cartilage...

This study proposes a sound source localization (SSL) method applicable to sources inside structures such as mechanical equipment or buildings. Presently, an SSL system employing microphone array based on the time difference of arrival estimation can be used localize in same acoustic space microphone. However, conventional methods cannot adopted when is located structure. Achieving more difficult case indirect than that direct sound, because correlation between observed signals becomes...

In recent years, biometric authentication technology for smartphones has become widespread, with the mainstream methods being fingerprint and face recognition. However, cannot be used when hands are wet, recognition a person is wearing mask. Like fingers, ear as contains features that enable human identification been subject of research on personal authentication. Authentication systems based acoustic transfer function pinna (PRTF: Pinna Related Transfer Function) have investigated. accuracy...

Abstract Background Accumulating evidence indicates that abnormal foot posture are risk factors for knee osteoarthritis (OA). However, the relationship between and tibiofemoral contact force (CF) during habitual weight-bearing activities remains unclear. This study aimed to determine association CF while walking. Methods In total, 18 patients with OA healthy individuals participated in this cross-sectional study. Foot parameters were evaluated by Posture Index (FPI), Staheli Arch (SAI),...

We propose a method for applying sound source localization (SSL) model trained on simulated data in real-world environment, with domain transfer (DT) the SSL inside product structure. The DT transfers real into pseudo-simulation data. simulation is then adapted to using model. As such, our consists of an and predicts position structure, whereas transforms Because not perfect, are extrapolated use However, transformed by interpolated within feature space. outcome that performance world...

In the personal authentication using acoustic properties of ear canal (pinna related transfer function) by previous study, high rate was obtained in case earphone and headphone. On other hand, mobile phone, which does not cover outer or canal, is lower than that devices. However, phone require any equipment for measuring because micro speaker microphone are built in. This an important point highly convenient system pinna function. this paper, authors investigate function measured phone.

Fractographic analysis of fracture surfaces helps to improve the performance mechanical pieces. In order determine causes that generated fracture, it is necessary classify a into failure mode. Experts in fractographic classification use visual evidence textures and surface marks classification. The images for this task are obtained using Scanning Election Microscope (SEM). With new advances machine learning artificial intelligence, specifically with deep Convolution Neural Networks (CNN)...

The functional importance of trunk muscle strength for running movement is widely recognised, but the kinematic effects undertaking specific training are unclear. This study investigated change in joint angle and its variability during following training. Eighteen young female novice runners participated. Using Plug-in-gait model with infrared markers attached to body surface, lower limb lumber angles were measured, was examined by calculating coefficient variation Lyapunov exponent....

In this paper, we consider personal authentication technology using individual differences of acoustic transfer function measured from the pinna; Pinna Related Transfer Function (PRTF). addition, in considering convenience practical use, a smartphone that is not necessary to be worn on pinna for each used measure PRTF. However, it known case smartphone, PRTF changes according emission direction measurement signal toward pinna, so rate lower than earphones and headphones. multiple locations...

Sound source localization (SSL) is important to reduce noise of products such as machinery and electrical appliances. Currently, SSL methods have been proposed that use the correlation time-frequency signals sound waves observed by multiple microphones. However, application these are limited case where acoustic can be directly observed. In estimating location a inside structure from outside structure, not applicable because signal indirect sound. An method using deep neural network (DNN)...

Excessive hip flexion torque to prioritize leg swings in the elderly is likely be a factor that reduces their propulsive force and gait stability, but mechanism not clear. To understand mechanism, we investigated how force, torque, margin of stability (MoS) change when only spring stiffness increased without changing walking speed simple model, verified whether relationship holds human walking. The results showed at speeds between 0.50 1.75 m/s, increasing decreased MoS both model...

We propose a sound source localization (SSL) method called Ac-CycleGAN, which estimates the position of inside structure using frequency spectrum accelerometers (FSAs) observed on exterior structure. Accurately localizing sources is crucial for noise mitigation in development automobiles, machinery, and home appliances. However, SSL from its has limitations, representing significant gap reducing product levels. To solve this challenge, Ac-CycleGAN learns under unpaired data conditions small...

In this paper, we present a new method to enhance classification performance of multiple classifier system by combining boosting technique called AdaBoost.M2 and Kernel Discriminant Analysis (KDA).To reduce the dependency between outputs speed up learning, each is trained in different feature space, which obtained applying KDA small set hard-to-classify training samples.The conducted based on AdaBoost.M2, classifiers are implemented Radial Basis Function networks.To perform at every round...

Improper footwear can lead to painful knee and functional limitations for osteoarthritis (OA) patients. This study aimed examine the use of different types in Japanese OA no symptomatic control elderly. The participants answered questionnaires comprised demographic data, function survey. In survey, they chose type wearing time with it. was classified according American College Rheumatology criteria. A total 219 elderly were selected which 69 who did not satisfy criteria excluded remainder...

In recent years, biometric authentication, such as fingerprint and face recognition, has become widespread in smartphones. However, authentication have the problem that they cannot be used depending on condition of user's fingers or face. Therefore, we been investigating a new system using pinna personal for smart phones. We studied Pinna Related Transfer Function (PRTF), which is an acoustic transfer function measured from pinna. since position smartphone changes every time it placed ear,...

We propose a method for sound source localization (SSL) inside structure using Ac-CycleGAN under unpaired data conditions. The proposed utilizes large amount of simulated and small actual experimental to locate in real environment. An generator contributes the transformation into data, or vice versa, from both domains. discriminator an model is designed differentiate between transformed generated by while also predicting location source. Vectors representing frequency spectrum accelerometers...

High-carbon high-strength JIS-SUJ2 bearing steel is an alloy having the characteristics of high wear resistance and fatigue strength as a result quenching. When this kind material exposed to long-lasting low stress application loadings, fisheye fractures can often be seen. In research, we measured retained austenite near fracture surface in JIS-SUJ2. After measurement, confirmed decrease vertical under both ductile fracture.