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  • 1
    Electronic Resource
    Electronic Resource
    Non-Invasive Kinematic Analysis of the Triceps Surae Muscle-Tendon Complex during a Gait (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1090-1093 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The purpose of this study is to calculate the length and velocity change of gastrocnemiusand soleus muscle-tendon complex (MTC) for diagnosis and estimation of the rehabilitationprocedure of the patient from non-invasive 3D markers. The previous method measuring the length ofMTC has been dependant on the regression equation based on the rotation angle in the sagittal plane.However, in view of the fact that movement analysis is based on the human body having a variety ofstructure, the measurement using merely rotation angle and regression equation which not based oneach subject shank and foot length might not be accurate. In order to overcome these limitations, thelength change of MTC is calculated, employing 3D MTC model accompanied with the trajectory dataof markers attached anatomical landmarks, each subject measurements and femur condyle radius.Basically, more accurate length change could be acquired through the 3D trajectory data of markers incomparing with 2D data based on the rotation angle.As our study, the difference of the gastrocnemius length change between 3D marker trajectorybased method and the method using a 2-D angle was approximately 4% (2cm) at maximumcontraction and 1% (0.5cm) at maximum relaxation. Similarly, the difference in terms of the soleuswas approximately 0.7% (0.3cm) at maximum contraction and 0.5% (0.2cm) at maximum relaxation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1090.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    The Development Telemedicine System for Blood Pressure Monitoring via Ethernet (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1103-1106 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The objective of this study was to develop an Ethernet-based telemedical blood pressuremonitor. Although telemedical applications utilizing a variety of media are currently available,present systems do not provide remote signals with regard to integrated vital information, includingblood pressure and pulse rate. In addition, the existing systems are largely embedded-structure,single-access, single-process models. Thus, we developed an Ethernet-based blood pressure monitorwhich includes a client/server structure, and is a real-time multi-access and multi-process system. Theclient for the developed system uses the Microsoft Comm Control in Microsoft Visual Basic andODBC to connect Microsoft Chart Control with DB for a user interface. The server is programmedwith the J2SE development platform, in a multi-thread structure. The system is capable of receivingdata simultaneously. A TCP/IP socket was used for the Ethernet connection. The JDBC was appliedto connect with the database for the saving, searching, and sampling of the data. The data transferfailure rate of the developed system was determined to be less than 0.05%
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1103.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    A New Severity Index for Nondestructive Dynamic Analyses in Equinus Gait (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1086-1089 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Equinus gait, defined as walking on one forefoot or both forefeet, has long been consideredan undesirable characteristic in patients with a variety of neuromuscular disorders. In the equinus gait,the heel contact pattern is changed according to the severity, because an excessive ankle plantarflexion instigates rearfoot lifting in patients. However, no biomechanical severity index exists toevaluate the rehabilitation procedure of equinus gait. Therefore, we developed an SIEG (SeverityIndex of Equinus Gait) for nondestructive evaluation of the equinus gait and to validate the index withregard to 11 kinematic and kinetic factors of gait analysis. In this study, the 3-D heel contact patternwas considered for the development of a severity index. In order to verify the result, we compared thedeveloped severity index values with ankle joint kinematic and kinetic factors in 3 test groups. As aresult, the average SIEG values ranged between 10.45 (Normal group) and 26.61 (Severe group) andthe highest correlation with regard to the 3 groups was shown in the developed severity index.Additionally, we also presented a fuzzy model using Takagi-Sugeno-Kang(TSK) logic with regard tothe 12 factors in order to more accurately classify equinus gait
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1086.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    The Analysis of Slice-Induced Factors in Golf Swing Using a 3D Motion Capture System (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1094-1097 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In golf, it is crucial that unintended shots, such as slices, be minimized. However, it hasproven rather difficult to improve golf performance via investigations of the causes of slicing, as thisparticular phenomenon is induced by a cooperative effect by each segment of the body, rather than bya single postural anomaly. Thus, the objective of this study was to isolate and characterize the factorscausing slicing, and to present possibilities for the improvement of golf performance via theminimization of the number of slices executed, using a three dimensional motion capture system,combined with multiple regression analysis, artificial neural network, and fuzzy logic techniques.This study obtained some interesting results, such as the following: (1) We isolated 9 slice-inducingfactors, using a stepwise method. (2) Our artificial neural network (ANN) accurately separated 'slice'from 'normal' shots (classification rate: 100%). (3)We could present the possibility of reducing thenumber of slice using the fuzzy logic. We expect that our data might be eventually used to improvegolf performance
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1094.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Moment Prediction for Evaluating Stability of the Upper Cervical Spine Fixed with Wires Using Finite Element Analysis (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1098-1102 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This study was aimed at predicting moments with respect to diameters of wires forevaluating stability of the upper cervical spine fixed with wires based on the finite element analysis. Incase of the severe atlanto-axial instability, several surgical methods have been tried and the posteriorfixation using wires has been widely used because of the sufficient stability and high rate of bonyadhesion. The diameters of wires applied in this study were 0.7 mm, 0.9 mm and 1.25 mm. 1.5 Nm isthe moment for the normal physiological range of motion of the upper cervical spine in cadavermodels. However, if this moment is applied to the occiput, an excessive load occurs at theoccipito-atlantal joint and clinical problems can break out realistically. Thus, it is necessary to predictmoments for evaluating stability with respect to diameters of wires. The results showed that 0.7 mmwire allowed the biggest moment while 1.25 mm wire allowed the smallest moment. In addition, theupper cervical spine fused with wires was stabilized effectively as the load increased
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1098.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Development of a Portable and Wireless Surface EMG (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1107-1110 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The objective of this study was to develop a portable, wireless surface EMG of anoninvasive type. The limitations of the existing system include its large size and the necessity of awire. Therefore, this study focused on the development of a portable and wireless type of EMG. Thedeveloped EMG, which has 10 channels, is composed of an electrode for the measurement of theEMG signal, a preamplifier for initial processing, a second amplifier, an A/D converter, and aBluetooth module for wireless communication. The communication of the developed EMG used aUART (Universal Asynchronous serial Receiver and Transmitter) and Bluetooth protocols. The rateof serial communication was set to 723kbps. This system is able to obtain 2,000 Hz in each channel.The data transfer success rate of the developed EMG is 100%
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1107.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Development of an Algorithm for a PZT Ceramic Foot Pressure Sensor (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1111-1114 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Currently available foot pressure sensors (FPS), which usually include a capacitive sensorand a piezoresistive sensor, tend to exhibit characteristically slow response times. Therefore, we usedPZT (lead zirconate-titanate) ceramic in this study, as it responds more quickly than thecurrently-used materials. We have developed an algorithm which can be applied to the PZTceramic-based measurement of foot pressure. This algorithm was also verified in experiments. In thisstudy, we fabricated the electronic circuits and a sensor on the basis of the newly-developedalgorithm, and then verified the algorithm experimentally
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1111.pdf
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